This file is indexed.

/usr/include/eina-1/eina/eina_value.h is in libeina-dev 1.7.10-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
/* EINA - EFL data type library
 * Copyright (C) 2012 ProFUSION embedded systems
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library;
 * if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef EINA_VALUE_H_
#define EINA_VALUE_H_

#include <stdarg.h>

#include "eina_types.h"
#include "eina_fp.h" /* defines int64_t and uint64_t */
#include "eina_inarray.h"
#include "eina_list.h"
#include "eina_hash.h"

/**
 * @page eina_value_example_01_page Eina_Value usage
 * @dontinclude eina_value_01.c
 *
 * This very simple example shows how to use some of the basic features of eina
 * value: setting and getting values, converting between types and printing a
 * value as a string.
 *
 * Our main function starts out with the basic, declaring some variables and
 * initializing eina:
 * @until eina_init
 *
 * Now we can jump into using eina value. We set a value, get this value and
 * then print it:
 * @until printf
 *
 * In the above snippet of code we printed an @c int value, we can however print
 * the value as a string:
 * @until free
 *
 * And once done with a value it's good practice to destroy it:
 * @until eina_value_flush
 *
 * We now reuse @c v to store a string, get its value and print it:
 * @until printf
 * @note Since @c s is the value and not returned by @c eina_value_to_string()
 * we don't need to free it.
 *
 * Just because we stored a string doesn't mean we can't use the @c
 * eina_value_to_string() function, we can and it's important to note that it
 * will return not the stored string but rather a copy of it(one we have to
 * free):
 * @until eina_value_flush
 *
 * And now to explore conversions between two type we'll create another value:
 * @until eina_value_setup
 *
 * And make sure @c v and @c otherv have different types:
 * @until eina_value_setup
 *
 * We then set a value to @c v and have it converted, to do this we don't need
 * to tell to which type we want to convert, we just say were we want to store
 * the converted value and eina value will figure out what to convert to, and
 * how:
 * @until eina_value_convert
 *
 * And now let's check the conversion worked:
 * @until printf
 *
 * But converting to strings is not particularly exciting, @c
 * eina_value_to_string() already did that, so now let's make the conversion the
 * other way around, from string to @c int:
 * @until printf
 *
 * And once done, destroy the values:
 * @until }
 *
 * Full source code: @ref eina_value_01_c
 */

/**
 * @page eina_value_01_c eina_value_01.c
 * @include eina_value_01.c
 * @example eina_value_01.c
 */

/**
 * @page eina_value_example_02_page Eina_Value struct usage
 * @dontinclude eina_value_02.c
 *
 * This example will examine a hypothetical situation in which we had a
 * structure(which represented parameters) with two fields, and then need to add
 * a third field to our structure. If using structs directly we'd need to
 * rewrite every piece of code that touches the struct, by using eina value, and
 * thus having the compiler not even know the struct, we can reduce the amount
 * of changes needed and retain interoperability between the old and new format.
 *
 * Our example will start with a function that creates descriptions of both of
 * our structs for eina value usage. The first step is to create a struct and
 * describe its members:
 * @until v1_members[1]
 * @note We can't pass the types of the members to EINA_VALUE_STRUCT_MEMBER
 * macro because they are not constant initializers.
 *
 * So far it should be pretty easy to understand, we said @c My_Struct_V1 has
 * two members, one of type @c int and another of type @c char. We now create
 * the description of the actual struct, again nothing overly complex, we signal
 * which version of EINA_VALUE_STRUCT we're using, we declare no special
 * operations, our members and our size:
 * @until V1_DESC
 *
 * We now repeat the process for the second version of our struct, the only
 * difference is the addition of a third parameter of type @c int :
 * @until V2_DESC
 * @until }
 *
 * We'll now look at a function that sets the values of our structs. For
 * simplicity's sake we initialize it we random values, a real world case would
 * read these values from a file, a database or even from the network. The
 * fundamental detail here is that this function works for both V1 and V2
 * structs, this is because setting a parameter that a struct that doesn't have
 * does nothing without throwing any errors:
 * @until }
 * @note While using eina_value_struct_set() with an in-existing parameter
 * causes no error, it does return #EINA_FALSE, to notify it was not possible
 * to set the value. This could be used to determine that we're handling a V1
 * struct and take some action based on that.
 *
 * The next thing is to do is see what a function that uses the values of the
 * struct looks like. We'll again be very simplistic in our usage, we'll just
 * print the values, but a real world case, might send these values to another
 * process use them to open a network/database connection or anything else.
 * Since all versions of the struct have @c param1 and @c param2 we'll
 * unconditionally use them:
 * @until printf
 *
 * The next step is to conditionally use @c param3, which can fortunately be
 * done in the same step in which we get it's value:
 * @until }
 *
 * There we've now got functions that can both populate and use values from both
 * our structs, so now let's actually use them in our main function by creating
 * a struct of each type, initializing them and them using them:
 * @until }
 *
 * This concludes our example. For the full source code see @ref
 * eina_value_02_c.
 */

/**
 * @page eina_value_02_c eina_value_02.c
 * @include eina_value_02.c
 * @example eina_value_02.c
 */

/**
 * @page eina_value_example_03_page Eina value custom type example
 * @dontinclude eina_value_03.c
 *
 * For this example we'll be creating our own custom type of eina value. Eina
 * value can already store struct timeval(man gettimeofday for more information)
 * but it has no type to store struct timezone, so that's what this example will
 * do.
 * @note struct timezone is actually obsolete, so using it in real world
 * programs is probably not a good idea, but this is an example so, bear with
 * us.
 *
 * To create our own custom eina value type we need to define functions to
 * do the following operations on it:
 * @li Setup
 * @li Flush
 * @li Copy
 * @li Compare
 * @li Set
 * @li Get
 * @li Conversion
 *
 * Most of this functions are very simple, so let's look at them, starting with
 * setup which only clear the memory so that we can be certain we won't be using
 * stale data:
 * @until }
 *
 * Now the flush function, which is even simpler, it does nothing, that's
 * because there is nothing we need to do, all the necessary steps are taken by
 * eina value itself:
 * @until }
 *
 * Our next function, copy, is a bit more interesting, but not much, it just
 * casts our void pointers to struct timezone pointers and does the copy:
 * @until }
 * @note By now you might be wondering why our functions receive void pointers
 * instead of pointers to struct timezone, and this is a good point. The reason
 * for this is that eina value doesn't know anything about our type so it must
 * use a generic void pointer, casting that pointer into a proper value is the
 * job of the implementor of the new type.
 *
 * Next we have the comparison function, which compares the @c tz_minuteswest
 * field of struct timezone, we don't compare @c tz_dsttime because that field
 * is not used in linux:
 * @until }
 *
 * Next we have setting, this however requires not one but rather two functions,
 * the reason for this is because to be able to receive arguments of any type
 * eina value uses <a href="https://wikipedia.org/wiki/Variadic_functions">
 * variadic functions</a>, so we need a function to get the argument from a 
 * va_list and another to actually to the setting.
 *
 * Lets first look at the pset function which sets the received value to a
 * pointer:
 * @until }
 *
 * Next we have the vset function which get the argument from the va_list and
 * passes it to the pset function:
 * @until }
 *
 * And now the function to get the value, a very simple copying of the value to
 * the given pointer:
 * @until }
 *
 * And finally our conversion function, this is our longest and most interesting
 * one. For numeric type we simply assign the value of @c tz_minuteswest to the
 * new type and call a set function using it:
 * @until EINA_VALUE_TYPE_DOUBLE
 * @until return
 * @note It would be a good idea to add checks for over and underflow for these
 * types and return #EINA_FALSE in thoses cases, we omit this here for brevity.
 *
 * For string types we use @c snprintf() to format our @c tz_minuteswest field
 * and put it in a string(again @c tz_dsttime is ignored because it's not used):
 * @until }
 *
 * Finally we handle any other types by returning an error in that case:
 * @until }
 *
 * Now that we have all the functions, we can populate an @c Eina_Value_Type to
 * later use it with @c eina_value_setup():
 * @until }
 *
 * We can now finally use our new TZ_TYPE with eina value, so lets conclude our
 * example by practicing that by setting its value and printing it:
 * @until }
 *
 * For the full source code see @ref eina_value_03_c.
 */

/**
 * @page eina_value_03_c eina_value_03.c
 * @include eina_value_03.c
 * @example eina_value_03.c
 */

/**
 * @addtogroup Eina_Data_Types_Group Data Types
 *
 * @since 1.2
 *
 * @{
 */

/**
 * @addtogroup Eina_Containers_Group Containers
 *
 * @{
 */

/**
 * @defgroup Eina_Value_Group Generic Value Storage
 *
 * Abstracts generic data storage and access to it in an extensible
 * and efficient way.
 *
 * It comes with pre-defined types for numbers, array, list, hash,
 * blob and structs. It is able to convert between data types,
 * including to string.
 *
 * It is meant for simple data types, providing uniform access and
 * release functions, useful to exchange data preserving their
 * types. For more complex hierarchical data, with properties and
 * children, reference counting, inheritance and interfaces, 
 *
 * Examples of usage of the Eina_Value API:
 * @li @ref eina_value_example_01_page
 * @li @ref eina_value_example_02_page
 * @li @ref eina_value_example_03_page
 *
 * @{
 */


/**
 * @typedef Eina_Value
 * Store generic values.
 *
 * @since 1.2
 */
typedef struct _Eina_Value Eina_Value;

/**
 * @typedef Eina_Value_Type
 * Describes the data contained by the value
 *
 * @since 1.2
 */
typedef struct _Eina_Value_Type Eina_Value_Type;

/**
 * @typedef Eina_Value_Union
 * Union of all known value types.
 *
 * This is only used to specify the minimum payload memory for #Eina_Value.
 *
 * @internal
 * @since 1.2
 */
typedef union _Eina_Value_Union Eina_Value_Union;

/**
 * @union _Eina_Value_Union
 * All possible value types.
 *
 * This is only used to specify the minimum payload memory for #Eina_Value.
 *
 * @internal
 * @since 1.2
 */
union _Eina_Value_Union
{
   unsigned char  buf[8];    /**< just hold 8-bytes, more goes into ptr */
   void          *ptr;       /**< used as generic pointer */
   uint64_t      _guarantee; /**< guarantees 8-byte alignment */
};

/**
 * @var EINA_VALUE_TYPE_UCHAR
 * manages unsigned char type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_UCHAR;

/**
 * @var EINA_VALUE_TYPE_USHORT
 * manages unsigned short type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_USHORT;

/**
 * @var EINA_VALUE_TYPE_UINT
 * manages unsigned int type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_UINT;

/**
 * @var EINA_VALUE_TYPE_ULONG
 * manages unsigned long type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_ULONG;

/**
 * @var EINA_VALUE_TYPE_TIMESTAMP
 * manages unsigned long type used for timestamps.
 * @note this is identical in function to EINA_VALUE_TYPE_ULONG
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_TIMESTAMP;

/**
 * @var EINA_VALUE_TYPE_UINT64
 * manages unsigned integer of 64 bits type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_UINT64;

/**
 * @var EINA_VALUE_TYPE_CHAR
 * manages char type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_CHAR;

/**
 * @var EINA_VALUE_TYPE_SHORT
 * manages short type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_SHORT;

/**
 * @var EINA_VALUE_TYPE_INT
 * manages int type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_INT;

/**
 * @var EINA_VALUE_TYPE_LONG
 * manages long type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_LONG;

/**
 * @var EINA_VALUE_TYPE_INT64
 * manages integer of 64 bits type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_INT64;

/**
 * @var EINA_VALUE_TYPE_FLOAT
 * manages float type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_FLOAT;

/**
 * @var EINA_VALUE_TYPE_DOUBLE
 * manages double type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_DOUBLE;

/**
 * @var EINA_VALUE_TYPE_STRINGSHARE
 * manages stringshared string type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_STRINGSHARE;

/**
 * @var EINA_VALUE_TYPE_STRING
 * manages string type.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_STRING;


/**
 * @var EINA_VALUE_TYPE_ARRAY
 *
 * manages array type. Use the value get/set for arrays:
 *  @li eina_value_array_get() and eina_value_array_set()
 *  @li eina_value_array_vget() and eina_value_array_vset()
 *  @li eina_value_array_pget() and eina_value_array_pset()
 *
 * eina_value_set() takes an #Eina_Value_Array where just @c subtype
 * and @c step are used. If there is an @c array, it will be copied
 * (including each item) and its contents must be properly
 * configurable as @c subtype expects. eina_value_pset() takes a
 * pointer to an #Eina_Value_Array.  For your convenience, use
 * eina_value_array_setup().
 *
 * eina_value_get() and eina_value_pget() takes a pointer
 * to #Eina_Value_Array, it's an exact copy of the current structure in
 * use by value, no copies are done.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_ARRAY;

/**
 * @var EINA_VALUE_TYPE_LIST
 *
 * manages list type. Use the value get/set for lists:
 *  @li eina_value_list_get() and eina_value_list_set()
 *  @li eina_value_list_vget() and eina_value_list_vset()
 *  @li eina_value_list_pget() and eina_value_list_pset()
 *
 * eina_value_set() takes an #Eina_Value_List where just @c subtype is
 * used. If there is an @c list, it will be copied (including each
 * item) and its contents must be properly configurable as @c
 * subtype expects. eina_value_pset() takes a pointer to an #Eina_Value_List.
 * For your convenience, use eina_value_list_setup().
 *
 * eina_value_get() and eina_value_pget() takes a pointer to #Eina_Value_List,
 * it's an exact copy of the current structure in use by value, no copies are
 * done.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_LIST;

/**
 * @var EINA_VALUE_TYPE_HASH
 *
 * manages hash type. Use the value get/set for hashes:
 *  @li eina_value_hash_get() and eina_value_hash_set()
 *  @li eina_value_hash_vget() and eina_value_hash_vset()
 *  @li eina_value_hash_pget() and eina_value_hash_pset()
 *
 * eina_value_set() takes an #Eina_Value_Hash where just @c subtype
 * and @c buckets_power_size are used. If there is an @c hash, it will
 * be copied (including each item) and its contents must be
 * properly configurable as @c subtype expects. eina_value_pset()
 * takes a pointer to an #Eina_Value_Hash.  For your convenience, use
 * eina_value_hash_setup().
 *
 * eina_value_get() and eina_value_pget() takes a pointer to #Eina_Value_Hash,
 * it's an exact copy of the current structure in use by value, no copies are
 * done.
 *
 * @note be aware that hash data is always an allocated memory of size
 *       defined by @c subtype->value_size. If your @c subtype is an
 *       integer, add as data malloc(sizeof(int)). If your @c subtype
 *       is an string, add as data malloc(sizeof(char*)) and this data
 *       value must point to strdup(string)!
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_HASH;

/**
 * @var EINA_VALUE_TYPE_TIMEVAL
 * manages 'struct timeval' type
 *
 * eina_value_set() takes a "struct timeval" from sys/time.h.
 * eina_value_pset() takes a pointer to "struct timeval".
 *
 * eina_value_get() and eina_value_pget() takes a pointer to "struct
 * timeval" and it's an exact copy of value.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_TIMEVAL;

/**
 * @var EINA_VALUE_TYPE_BLOB
 * manages blob of bytes type, see @ref Eina_Value_Blob
 *
 * eina_value_set() takes an #Eina_Value_Blob
 * eina_value_pset() takes a pointer to #Eina_Value_Blob.
 *
 * eina_value_get() and eina_value_pget() takes a pointer to #Eina_Value_Blob
 * and it's an exact copy of value, no allocations are made.
 *
 * Memory is untouched unless you provide @c ops (operations) pointer.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_BLOB;

/**
 * @var EINA_VALUE_TYPE_STRUCT
 *
 * manages struct type. Use the value get/set for structs:
 *  @li eina_value_struct_get() and eina_value_struct_set()
 *  @li eina_value_struct_vget() and eina_value_struct_vset()
 *  @li eina_value_struct_pget() and eina_value_struct_pset()
 *
 * eina_value_set() takes an #Eina_Value_Struct where just @c desc is
 * used. If there is an @c memory, it will be copied (including each
 * member) and its contents must be properly configurable as @c desc
 * expects. eina_value_pset() takes a pointer to an #Eina_Value_Struct. For
 * your convenience, use eina_value_struct_setup().
 *
 * eina_value_get() and eina_value_pget() takes a pointer
 * to #Eina_Value_Struct, it's an exact copy of the current structure in
 * use by value, no copies are done.
 *
 * @since 1.2
 */
EAPI extern const Eina_Value_Type *EINA_VALUE_TYPE_STRUCT;

/**
 * @var EINA_ERROR_VALUE_FAILED
 * Error identifier corresponding to value check failure.
 *
 * @since 1.2
 */
EAPI extern int EINA_ERROR_VALUE_FAILED;

/**
 * @defgroup Eina_Value_Value_Group Generic Value management
 *
 * @{
 */

/**
 * @struct _Eina_Value
 * defines the contents of a value
 *
 * @since 1.2
 */
struct _Eina_Value
{
   const Eina_Value_Type *type; /**< how to access values */
   Eina_Value_Union value; /**< to be accessed with type descriptor */
};

/**
 * @brief Create generic value storage.
 * @param type how to manage this value.
 * @return The new value or @c NULL on failure.
 *
 * Create a new generic value storage. The members are managed using
 * the description specified by @a type.
 *
 * Some types may specify more operations:
 * eg. #EINA_VALUE_TYPE_ARRAY uses eina_value_array_set(),
 * eina_value_array_get() and so on.
 *
 * On failure, @c NULL is returned and either #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @note this calls creates from mempool and then uses
 *       eina_value_setup(). Consider using eina_value_flush() and
 *       eina_value_setup() instead to avoid memory allocations.
 *
 * @see eina_value_free()
 *
 * @since 1.2
 */
EAPI Eina_Value *eina_value_new(const Eina_Value_Type *type) EINA_ARG_NONNULL(1) EINA_MALLOC EINA_WARN_UNUSED_RESULT;

/**
 * @brief Free value and its data.
 * @param value value object
 *
 * @see eina_value_flush()
 *
 * @since 1.2
 */
EAPI void eina_value_free(Eina_Value *value) EINA_ARG_NONNULL(1);


/**
 * @brief Initialize generic value storage.
 * @param value value object
 * @param type how to manage this value.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * Initializes existing generic value storage. The members are managed using the
 * description specified by @a type.
 *
 * Some types may specify more operations, as an example #EINA_VALUE_TYPE_ARRAY
 * uses eina_value_array_set(), eina_value_array_get() and so on.
 *
 * @note Existing contents are ignored! If the value was previously used, then
 *       use eina_value_flush() first.
 *
 * On failure, #EINA_FALSE is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @see eina_value_flush()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_setup(Eina_Value *value,
                                         const Eina_Value_Type *type) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Create generic value storage.
 * @param value value object
 *
 * Releases all the resources associated with an #Eina_Value. The
 * value must be already set with eina_value_setup() or
 * eina_value_new().
 *
 * After this call returns, the contents of the value are undefined,
 * but the value can be reused by calling eina_value_setup() again.
 *
 * @see eina_value_setup()
 * @see eina_value_free()
 *
 * @since 1.2
 */
static inline void eina_value_flush(Eina_Value *value) EINA_ARG_NONNULL(1);

/**
 * @brief Copy generic value storage.
 * @param value source value object
 * @param copy destination value object
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The @a copy object is considered uninitialized and its existing
 * contents are overwritten (just as if eina_value_flush() was called on
 * it).
 *
 * The copy happens by calling eina_value_setup() on @a copy, followed
 * by getting the contents of @a value and setting it to @a copy.
 *
 * @since 1.2
 */
EAPI Eina_Bool eina_value_copy(const Eina_Value *value,
                               Eina_Value *copy) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Compare generic value storage.
 * @param a left side of comparison
 * @param b right side of comparison
 * @return less than zero if a < b, greater than zero if a > b, zero
 *         if a == b
 *
 * @since 1.2
 */
static inline int eina_value_compare(const Eina_Value *a,
                                     const Eina_Value *b) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Set the generic value.
 * @param value source value object
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_new(EINA_VALUE_TYPE_INT);
 *     int x = 567;
 *     eina_value_set(value, 1234);
 *     eina_value_set(value, x);
 *
 *     eina_value_flush(value);
 *
 *     eina_value_setup(value, EINA_VALUE_TYPE_STRING);
 *     eina_value_set(value, "hello world!");
 *
 *     eina_value_free(value);
 * @endcode
 *
 * @note for array member see eina_value_array_set()
 * @note for list member see eina_value_list_set()
 * @note for hash member see eina_value_hash_set()
 *
 * @see eina_value_get()
 * @see eina_value_vset()
 * @see eina_value_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_set(Eina_Value *value,
                                       ...) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value.
 * @param value source value object
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * The variable argument is dependent on chosen type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *     const char *s;
 *
 *     eina_value_set(value, 1234);
 *     eina_value_get(value, &x);
 *
 *     eina_value_flush(value);
 *
 *     eina_value_setup(value, EINA_VALUE_TYPE_STRING);
 *     eina_value_set(value, "hello world!");
 *     eina_value_get(value, &s);
 *
 *     eina_value_free(value);
 * @endcode
 *
 * @note for array member see eina_value_array_get()
 * @note for list member see eina_value_list_get()
 * @note for hash member see eina_value_hash_get()
 *
 * @see eina_value_set()
 * @see eina_value_vset()
 * @see eina_value_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_get(const Eina_Value *value,
                                       ...) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value.
 * @param value source value object
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * @note for array member see eina_value_array_vset()
 * @note for list member see eina_value_list_vset()
 * @note for hash member see eina_value_hash_vset()
 *
 * @see eina_value_vget()
 * @see eina_value_set()
 * @see eina_value_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_vset(Eina_Value *value,
                                        va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value.
 * @param value source value object
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * @note for array member see eina_value_array_vget()
 * @note for list member see eina_value_list_vget()
 * @note for hash member see eina_value_hash_vget()
 *
 * @see eina_value_vset()
 * @see eina_value_get()
 * @see eina_value_pget()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_vget(const Eina_Value *value,
                                        va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value from pointer.
 * @param value source value object
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_new(EINA_VALUE_TYPE_INT);
 *     int x = 567;
 *     const char *s = "hello world!";
 *
 *     eina_value_pset(value, &x);
 *
 *     eina_value_flush(value);
 *
 *     eina_value_setup(value, EINA_VALUE_TYPE_STRING);
 *     eina_value_pset(value, &s);
 *
 *     eina_value_free(value);
 * @endcode
 *
 * @note for array member see eina_value_array_pset()
 * @note for list member see eina_value_list_pset()
 * @note for hash member see eina_value_hash_pset()
 *
 * @see eina_value_pget()
 * @see eina_value_set()
 * @see eina_value_vset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_pset(Eina_Value *value,
                                        const void *ptr) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Get the generic value to pointer.
 * @param value source value object
 * @param ptr pointer to receive the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in pointer contents, the actual value is
 * type-dependent, but usually it will be what is stored inside the
 * object. There shouldn't be any memory allocation, thus the contents
 * should @b not be freed.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 *
 * @code
 *     Eina_Value *value = eina_value_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *     const char *s;
 *
 *     eina_value_set(value, 1234);
 *     eina_value_pget(value, &x);
 *
 *     eina_value_flush(value);
 *
 *     eina_value_setup(value, EINA_VALUE_TYPE_STRING);
 *     eina_value_set(value, "hello world!");
 *     eina_value_pget(value, &s);
 *
 *     eina_value_free(value);
 * @endcode
 *
 * @note for array member see eina_value_array_get()
 * @note for list member see eina_value_list_get()
 * @note for hash member see eina_value_hash_get()
 *
 * @see eina_value_set()
 * @see eina_value_vset()
 * @see eina_value_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_pget(const Eina_Value *value,
                                        void *ptr) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Convert one value to another type.
 * @param value source value object.
 * @param convert destination value object.
 * @return #EINA_TRUE if converted, #EINA_FALSE otherwise.
 *
 * Converts one value to another trying first @a value type
 * @c convert_to() function. If unsuccessful, tries using @c convert_from()
 * function in @a convert.
 *
 * Conversion functions are type defined, and the basic types can convert
 * between themselves, but conversion is strict! That is, if
 * converting from negative value to unsigned type, it will fail. It
 * also fails on value overflow.
 *
 * It is recommended that all types implement at least convert to
 * string, used by eina_value_to_string().
 *
 * @note Both objects must have eina_value_setup() called on them beforehand!
 *
 * @since 1.2
 */
EAPI Eina_Bool eina_value_convert(const Eina_Value *value,
                                  Eina_Value *convert) EINA_ARG_NONNULL(1, 2);


/**
 * @brief Convert value to string.
 * @param value value object.
 * @return newly allocated memory or @c NULL on failure.
 *
 * @see eina_value_convert()
 * @since 1.2
 */
EAPI char *eina_value_to_string(const Eina_Value *value) EINA_ARG_NONNULL(1);

/**
 * @brief Query value type.
 * @param value value object.
 * @return type instance or @c NULL if type is invalid.
 *
 * Check if value type is valid and returns it. A type is invalid if
 * it does not exist or if it is using a different version field.
 *
 * @see eina_value_type_check()
 *
 * @since 1.2
 */
static inline const Eina_Value_Type *eina_value_type_get(const Eina_Value *value) EINA_PURE EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;

/**
 * @}
 */


/**
 * @defgroup Eina_Value_Array_Group Generic Value Array management
 *
 * @{
 */


/**
 * @typedef Eina_Value_Array
 * Value type for #EINA_VALUE_TYPE_ARRAY.
 *
 * @see #_Eina_Value_Array explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Array Eina_Value_Array;

/**
 * @struct _Eina_Value_Array
 * Used to store the array and its subtype.
 * @since 1.2
 */
struct _Eina_Value_Array
{
   const Eina_Value_Type *subtype; /**< how to allocate and access items */
   unsigned int step; /**< how to grow the members array */
   Eina_Inarray *array; /**< the array that holds data, members are of subtype->value_size bytes. */
};

/**
 * @brief Create generic value storage of type array.
 * @param subtype how to manage this array members.
 * @param step how to grow the members array.
 * @return The new value or @c NULL on failure.
 *
 * Create a new generic value storage of type array. The members are
 * managed using the description specified by @a subtype.
 *
 * On failure, @c NULL is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @note this creates from mempool and then uses
 *       eina_value_array_setup().  @see eina_value_free() @see
 *       eina_value_array_setup()
 *
 * @since 1.2
 */
EAPI Eina_Value *eina_value_array_new(const Eina_Value_Type *subtype,
                                      unsigned int step) EINA_ARG_NONNULL(1);

/**
 * @brief Initialize generic value storage of type array.
 * @param value value object
 * @param subtype how to manage array members.
 * @param step how to grow the members array.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * Initializes new generic value storage of type array with the given
 * @a subtype.
 *
 * This is the same as calling eina_value_set()
 * with #EINA_VALUE_TYPE_ARRAY followed by eina_value_pset() with
 * the #Eina_Value_Array description configured.
 *
 * @note Existing contents are ignored! If the value was previously used, then
 *       use eina_value_flush() first.
 *
 * On failure, #EINA_FALSE is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @see eina_value_flush()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_setup(Eina_Value *value,
                                               const Eina_Value_Type *subtype,
                                               unsigned int step) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Query number of elements in value of array type.
 * @param value value object.
 * @return number of child elements.
 * @since 1.2
 */
static inline unsigned int eina_value_array_count(const Eina_Value *value);

/**
 * @brief Remove element at given position in value of array type.
 * @param value value object.
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_remove(Eina_Value *value,
                                                unsigned int position) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value in an array member.
 * @param value source value object
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_array_append(value, 1234);
 *     eina_value_array_set(value, 0, 5678);
 *     eina_value_array_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_pset()
 * @see eina_value_array_insert()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_set(Eina_Value *value,
                                             unsigned int position,
                                             ...) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value from an array member.
 * @param value source value object
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, and the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation;
 * thus the contents should @b not be freed.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_array_append(value, 1234);
 *     eina_value_array_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_vset()
 * @see eina_value_array_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_get(const Eina_Value *value,
                                             unsigned int position,
                                             ...) EINA_ARG_NONNULL(1);

/**
 * @brief Insert a generic value in an array member position.
 * @param value source value object
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_array_insert(value, 0, 1234);
 *     eina_value_array_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_pset()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_insert(Eina_Value *value,
                                                unsigned int position,
                                                ...) EINA_ARG_NONNULL(1);


/**
 * @brief Append a generic value in an array.
 * @param value source value object
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_array_append(value, 1234);
 *     eina_value_array_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_pset()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_append(Eina_Value *value,
                                                ...) EINA_ARG_NONNULL(1);

/**
 * @brief Set a generic value to an array member.
 * @param value source value object
 * @param position index of the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_pset()
 * @see eina_value_array_insert()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_vset(Eina_Value *value,
                                              unsigned int position,
                                              va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value from an array member.
 * @param value source value object
 * @param position index of the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * @see eina_value_array_vset()
 * @see eina_value_array_get()
 * @see eina_value_array_pget()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_vget(const Eina_Value *value,
                                              unsigned int position,
                                              va_list args) EINA_ARG_NONNULL(1);
/**
 * @brief Insert a generic value to an array member position.
 * @param value source value object
 * @param position index of the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_pset()
 * @see eina_value_array_insert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_vinsert(Eina_Value *value,
                                                unsigned int position,
                                                va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Append a generic value to an array.
 * @param value source value object
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vget()
 * @see eina_value_array_pset()
 * @see eina_value_array_insert()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_vappend(Eina_Value *value,
                                                 va_list args) EINA_ARG_NONNULL(1);


/**
 * @brief Set a generic value to an array member from a pointer.
 * @param value source value object
 * @param position index of the member
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x = 1234;
 *
 *     eina_value_array_append(value, 1234);
 *     eina_value_array_pset(value, 0, &x);
 *     eina_value_array_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_insert()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_pset(Eina_Value *value,
                                              unsigned int position,
                                              const void *ptr) EINA_ARG_NONNULL(1, 3);

/**
 * @brief Retrieve a generic value into a pointer from an array member.
 * @param value source value object
 * @param position index of the member
 * @param ptr pointer to receive the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in pointer contents, the actual value is
 * type-dependent, but usually it will be what is stored inside the
 * object. There shouldn't be any memory allocation, thus the contents
 * should @b not be freed.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_array_append(value, 1234);
 *     eina_value_array_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_vset()
 * @see eina_value_array_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_pget(const Eina_Value *value,
                                              unsigned int position,
                                              void *ptr) EINA_ARG_NONNULL(1, 3);

/**
 * @brief Insert a generic value to an array member position from a pointer.
 * @param value source value object
 * @param position index of the member
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x = 1234;
 *
 *     eina_value_array_pinsert(value, 0, &x);
 *     eina_value_array_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_insert()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_pinsert(Eina_Value *value,
                                                 unsigned int position,
                                                 const void *ptr) EINA_ARG_NONNULL(1);

/**
 * @brief Append a generic value to an array from a pointer.
 * @param value source value object
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_ARRAY: Eina_Value_Array*
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_array_new(EINA_VALUE_TYPE_INT, 0);
 *     int x = 1234;
 *
 *     eina_value_array_pappend(value, &x);
 *     eina_value_array_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_array_set()
 * @see eina_value_array_get()
 * @see eina_value_array_vset()
 * @see eina_value_array_insert()
 * @see eina_value_array_vinsert()
 * @see eina_value_array_pinsert()
 * @see eina_value_array_append()
 * @see eina_value_array_vappend()
 * @see eina_value_array_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_pappend(Eina_Value *value,
                                                 const void *ptr) EINA_ARG_NONNULL(1);

/**
 * @brief Retrieves a value from the array as an Eina_Value copy.
 * @param src source value object
 * @param position index of the member
 * @param dst where to return the array member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The argument @a dst is considered uninitialized and it's setup to
 * the type of the member.
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_array_value_get(const Eina_Value *src,
                                                   unsigned int position,
                                                   Eina_Value *dst) EINA_ARG_NONNULL(1, 3);

/**
 * @}
 */


/**
 * @defgroup Eina_Value_List_Group Generic Value List management
 *
 * @{
 */


/**
 * @typedef Eina_Value_List
 * Value type for #EINA_VALUE_TYPE_LIST.
 *
 * @see #_Eina_Value_List explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_List Eina_Value_List;

/**
 * @struct _Eina_Value_List
 * Used to store the list and its subtype.
 * @since 1.2
 */
struct _Eina_Value_List
{
   const Eina_Value_Type *subtype; /**< how to allocate and access items */
   Eina_List *list; /**< the list that holds data, members are of subtype->value_size bytes. */
};

/**
 * @brief Create generic value storage of type list.
 * @param subtype how to manage this list members.
 * @return The new value or @c NULL on failure.
 *
 * Create a new generic value storage of type list. The members are
 * managed using the description specified by @a subtype.
 *
 * On failure, @c NULL is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @note this creates from mempool and then uses
 *       eina_value_list_setup().
 *
 * @see eina_value_free()
 * @see eina_value_list_setup()
 *
 * @since 1.2
 */
EAPI Eina_Value *eina_value_list_new(const Eina_Value_Type *subtype) EINA_ARG_NONNULL(1);

/**
 * @brief Initialize generic value storage of type list.
 * @param value value object
 * @param subtype how to manage this list members.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * Initializes new generic value storage of type list with the given
 * @a subtype.
 *
 * This is the same as calling eina_value_set()
 * with #EINA_VALUE_TYPE_LIST followed by eina_value_pset() with
 * the #Eina_Value_List description configured.
 *
 * @note Existing contents are ignored! If the value was previously used, then
 *       use eina_value_flush() first.
 *
 * On failure, #EINA_FALSE is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @see eina_value_flush()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_setup(Eina_Value *value,
                                               const Eina_Value_Type *subtype) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Query number of elements in value of list type.
 * @param value value object.
 * @return number of child elements.
 * @since 1.2
 */
static inline unsigned int eina_value_list_count(const Eina_Value *value);

/**
 * @brief Remove element at given position in value of list type.
 * @param value value object.
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_remove(Eina_Value *value,
                                                unsigned int position) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value in an list member.
 * @param value source value object
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *
 *     eina_value_list_append(value, 1234);
 *     eina_value_list_set(value, 0, 5678);
 *     eina_value_list_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_pset()
 * @see eina_value_list_insert()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_set(Eina_Value *value,
                                             unsigned int position,
                                             ...) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value from an list member.
 * @param value source value object
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *
 *     eina_value_list_append(value, 1234);
 *     eina_value_list_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_vset()
 * @see eina_value_list_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_get(const Eina_Value *value,
                                             unsigned int position,
                                             ...) EINA_ARG_NONNULL(1);

/**
 * @brief Insert the generic value in an list member position.
 * @param value source value object
 * @param position index of the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *
 *     eina_value_list_insert(value, 0, 1234);
 *     eina_value_list_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_pset()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_insert(Eina_Value *value,
                                                unsigned int position,
                                                ...) EINA_ARG_NONNULL(1);


/**
 * @brief Append the generic value in an list.
 * @param value source value object
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *
 *     eina_value_list_append(value, 1234);
 *     eina_value_list_get(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_pset()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_append(Eina_Value *value,
                                                ...) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value in an list member.
 * @param value source value object
 * @param position index of the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_pset()
 * @see eina_value_list_insert()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_vset(Eina_Value *value,
                                              unsigned int position,
                                              va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value from an list member.
 * @param value source value object
 * @param position index of the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * @see eina_value_list_vset()
 * @see eina_value_list_get()
 * @see eina_value_list_pget()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_vget(const Eina_Value *value,
                                              unsigned int position,
                                              va_list args) EINA_ARG_NONNULL(1);
/**
 * @brief Insert the generic value in an list member position.
 * @param value source value object
 * @param position index of the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_pset()
 * @see eina_value_list_insert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_vinsert(Eina_Value *value,
                                                unsigned int position,
                                                va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Append the generic value in an list.
 * @param value source value object
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vget()
 * @see eina_value_list_pset()
 * @see eina_value_list_insert()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_vappend(Eina_Value *value,
                                                 va_list args) EINA_ARG_NONNULL(1);


/**
 * @brief Set the generic value in an list member from pointer.
 * @param value source value object
 * @param position index of the member
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x = 1234;
 *
 *     eina_value_list_append(value, 1234);
 *     eina_value_list_pset(value, 0, &x);
 *     eina_value_list_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_insert()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_pset(Eina_Value *value,
                                              unsigned int position,
                                              const void *ptr) EINA_ARG_NONNULL(1, 3);

/**
 * @brief Get the generic value to pointer from an list member.
 * @param value source value object
 * @param position index of the member
 * @param ptr pointer to receive the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in pointer contents, the actual value is
 * type-dependent, but usually it will be what is stored inside the
 * object. There shouldn't be any memory allocation, thus the contents
 * should @b not be freed.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x;
 *
 *     eina_value_list_append(value, 1234);
 *     eina_value_list_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_vset()
 * @see eina_value_list_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_pget(const Eina_Value *value,
                                              unsigned int position,
                                              void *ptr) EINA_ARG_NONNULL(1, 3);

/**
 * @brief Insert the generic value in an list member position from pointer.
 * @param value source value object
 * @param position index of the member
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x = 1234;
 *
 *     eina_value_list_pinsert(value, 0, &x);
 *     eina_value_list_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_insert()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_pinsert(Eina_Value *value,
                                                 unsigned int position,
                                                 const void *ptr) EINA_ARG_NONNULL(1);

/**
 * @brief Append the generic value in an list from pointer.
 * @param value source value object
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_LIST: Eina_Value_List*
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_list_new(EINA_VALUE_TYPE_INT);
 *     int x = 1234;
 *
 *     eina_value_list_pappend(value, &x);
 *     eina_value_list_pget(value, 0, &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_list_set()
 * @see eina_value_list_get()
 * @see eina_value_list_vset()
 * @see eina_value_list_insert()
 * @see eina_value_list_vinsert()
 * @see eina_value_list_pinsert()
 * @see eina_value_list_append()
 * @see eina_value_list_vappend()
 * @see eina_value_list_pappend()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_list_pappend(Eina_Value *value,
                                                 const void *ptr) EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @defgroup Eina_Value_Hash_Group Generic Value Hash management
 *
 * @{
 */

/**
 * @typedef Eina_Value_Hash
 * Value type for #EINA_VALUE_TYPE_HASH.
 *
 * @see #_Eina_Value_Hash explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Hash Eina_Value_Hash;

/**
 * @struct _Eina_Value_Hash
 * Used to store the hash and its subtype.
 * @since 1.2
 */
struct _Eina_Value_Hash
{
   const Eina_Value_Type *subtype; /**< how to allocate and access items */
   unsigned int buckets_power_size; /**< how to allocate hash buckets, if zero a sane default is chosen. */
   Eina_Hash *hash; /**< the hash that holds data, members are of subtype->value_size bytes. */
};

/**
 * @brief Create generic value storage of type hash.
 * @param subtype how to manage this hash members.
 * @param buckets_power_size how to allocate hash buckets (2 ^
 *        buckets_power_size), if zero then a sane value is chosen.
 * @return The new value or @c NULL on failure.
 *
 * Create a new generic value storage of type hash. The members are
 * managed using the description specified by @a subtype.
 *
 * On failure, @c NULL is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @note this creates from mempool and then uses
 *       eina_value_hash_setup().
 *
 * @see eina_value_free()
 * @see eina_value_hash_setup()
 *
 * @since 1.2
 */
EAPI Eina_Value *eina_value_hash_new(const Eina_Value_Type *subtype, unsigned int buckets_power_size) EINA_ARG_NONNULL(1);

/**
 * @brief Initialize generic value storage of type hash.
 * @param value value object
 * @param subtype how to manage this hash members.
 * @param buckets_power_size how to allocate hash buckets (2 ^
 *        buckets_power_size), if zero then a sane value is chosen.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * Initializes new generic value storage of type hash with the given
 * @a subtype.
 *
 * This is the same as calling eina_value_set()
 * with #EINA_VALUE_TYPE_HASH followed by eina_value_pset() with
 * the #Eina_Value_Hash description configured.
 *
 * @note Existing contents are ignored! If the value was previously used, then
 *       use eina_value_flush() first.
 *
 * On failure, #EINA_FALSE is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @see eina_value_flush()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_setup(Eina_Value *value,
                                              const Eina_Value_Type *subtype,
                                              unsigned int buckets_power_size) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Query number of elements in value of hash type.
 * @param value value object.
 * @return number of child elements.
 * @since 1.2
 */
static inline unsigned int eina_value_hash_population(const Eina_Value *value);

/**
 * @brief Remove element at given position in value of hash type.
 * @param value value object.
 * @param key key to find the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_del(Eina_Value *value,
                                            const char *key) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value in an hash member.
 * @param value source value object
 * @param key key to find the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_hash_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_hash_set(value, "abc", 5678);
 *     eina_value_hash_get(value, "abc", &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_hash_get()
 * @see eina_value_hash_vset()
 * @see eina_value_hash_pset()
 * @see eina_value_hash_del()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_set(Eina_Value *value,
                                            const char *key,
                                            ...) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value from an hash member.
 * @param value source value object
 * @param key key to find the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * The variable argument is dependent on chosen subtype. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_hash_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_hash_set(value, "abc", 1234);
 *     eina_value_hash_get(value, "abc", &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_hash_set()
 * @see eina_value_hash_vset()
 * @see eina_value_hash_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_get(const Eina_Value *value,
                                            const char *key,
                                            ...) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value in an hash member.
 * @param value source value object
 * @param key key to find the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_hash_set()
 * @see eina_value_hash_get()
 * @see eina_value_hash_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_vset(Eina_Value *value,
                                             const char *key,
                                             va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Get the generic value from an hash member.
 * @param value source value object
 * @param key key to find the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * @see eina_value_hash_vset()
 * @see eina_value_hash_get()
 * @see eina_value_hash_pget()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_vget(const Eina_Value *value,
                                             const char *key,
                                             va_list args) EINA_ARG_NONNULL(1);

/**
 * @brief Set the generic value in an hash member from pointer.
 * @param value source value object
 * @param key key to find the member
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     Eina_Value *value = eina_value_hash_new(EINA_VALUE_TYPE_INT, 0);
 *     int x = 1234;
 *
 *     eina_value_hash_pset(value, "abc", &x);
 *     eina_value_hash_pget(value, "abc", &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_hash_set()
 * @see eina_value_hash_get()
 * @see eina_value_hash_vset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_pset(Eina_Value *value,
                                             const char *key,
                                             const void *ptr) EINA_ARG_NONNULL(1, 3);

/**
 * @brief Get the generic value to pointer from an hash member.
 * @param value source value object
 * @param key key to find the member
 * @param ptr pointer to receive the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in pointer contents, the actual value is
 * type-dependent, but usually it will be what is stored inside the
 * object. There shouldn't be any memory allocation, thus the contents
 * should @b not be freed.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     Eina_Value *value = eina_value_hash_new(EINA_VALUE_TYPE_INT, 0);
 *     int x;
 *
 *     eina_value_hash_set(value, "abc", 1234);
 *     eina_value_hash_pget(value, "abc", &x);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_hash_set()
 * @see eina_value_hash_vset()
 * @see eina_value_hash_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_hash_pget(const Eina_Value *value,
                                             const char *key,
                                             void *ptr) EINA_ARG_NONNULL(1, 3);

/**
 * @}
 */

/**
 * @defgroup Eina_Value_Blob_Group Generic Value Blob management
 *
 * @{
 */

/**
 * @typedef Eina_Value_Blob_Operations
 * How to manage blob. Any @c NULL callback is ignored.
 * @see #_Eina_Value_Blob_Operations explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Blob_Operations Eina_Value_Blob_Operations;

/**
 * @def EINA_VALUE_BLOB_OPERATIONS_VERSION
 * Current API version, used to validate #_Eina_Value_Blob_Operations.
 */
#define EINA_VALUE_BLOB_OPERATIONS_VERSION (1)

/**
 * @struct _Eina_Value_Blob_Operations
 * How to manage blob. Any @c NULL callback is ignored.
 * @since 1.2
 */
struct _Eina_Value_Blob_Operations
{
   unsigned int version; /**< must be #EINA_VALUE_BLOB_OPERATIONS_VERSION */
   void (*free)(const Eina_Value_Blob_Operations *ops, void *memory, size_t size);
   void *(*copy)(const Eina_Value_Blob_Operations *ops, const void *memory, size_t size);
   int (*compare)(const Eina_Value_Blob_Operations *ops, const void *data1, size_t size_data1, const void *data2, size_t size_data2);
   char *(*to_string)(const Eina_Value_Blob_Operations *ops, const void *memory, size_t size);
};

/**
 * @var EINA_VALUE_BLOB_OPERATIONS_MALLOC
 *
 * Assumes @c memory was create with malloc() and applies free() to it
 * during flush (Eina_Value_Blob_Operations::free). Copy is done with
 * malloc() as well.
 *
 * No compare or to_string are provided, defaults will be used.
 */
EAPI extern const Eina_Value_Blob_Operations *EINA_VALUE_BLOB_OPERATIONS_MALLOC;

/**
 * @typedef Eina_Value_Blob
 * Value type for #EINA_VALUE_TYPE_BLOB.
 *
 * @see #_Eina_Value_Blob explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Blob Eina_Value_Blob;

/**
 * @struct _Eina_Value_Blob
 * Used to store the blob information and management operations.
 * @since 1.2
 */
struct _Eina_Value_Blob
{
   const Eina_Value_Blob_Operations *ops; /**< if @c NULL, nothing is freed, copy will just copy the memory pointer, not its value. */
   const void *memory;
   unsigned int size;
};

/**
 * @}
 */

/**
 * @defgroup Eina_Value_Struct_Group Generic Value Struct management
 *
 * @{
 */

/**
 * @typedef Eina_Value_Struct_Operations
 * How to manage struct. Any @c NULL callback is ignored.
 *
 * A structure can specify alternative methods to allocate, free and
 * copy itself. See structure definition for all methods.
 *
 * @see #_Eina_Value_Struct_Operations explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Struct_Operations Eina_Value_Struct_Operations;

/**
 * @typedef Eina_Value_Struct_Member
 * Describes a single member of struct.
 *
 * The member holds a name, type and its byte offset within the struct
 * memory. Most Eina_Value_Struct functions takes the member name as
 * parameter, as in eina_value_struct_set().
 *
 * @see #_Eina_Value_Struct_Member explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Struct_Member Eina_Value_Struct_Member;

/**
 * @typedef Eina_Value_Struct_Desc
 * Describes the struct by listing its size, members and operations.
 * @see #_Eina_Value_Struct_Desc explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Struct_Desc Eina_Value_Struct_Desc;

/**
 * @typedef Eina_Value_Struct
 * Value type for #EINA_VALUE_TYPE_STRUCT.
 *
 * @see #_Eina_Value_Struct explains fields.
 * @since 1.2
 */
typedef struct _Eina_Value_Struct Eina_Value_Struct;

/**
 * @def EINA_VALUE_STRUCT_OPERATIONS_VERSION
 * Current API version, used to validate #_Eina_Value_Struct_Operations.
 */
#define EINA_VALUE_STRUCT_OPERATIONS_VERSION (1)

/**
 * @struct _Eina_Value_Struct_Operations
 * How to manage struct. Any @c NULL callback is ignored.
 * @since 1.2
 */
struct _Eina_Value_Struct_Operations
{
   unsigned int version; /**< must be #EINA_VALUE_STRUCT_OPERATIONS_VERSION */
   void *(*alloc)(const Eina_Value_Struct_Operations *ops, const Eina_Value_Struct_Desc *desc); /**< How to allocate struct memory to be managed by the Eina_Value */
   void (*free)(const Eina_Value_Struct_Operations *ops, const Eina_Value_Struct_Desc *desc, void *memory); /**< How to release memory managed by the Eina_Value */
   void *(*copy)(const Eina_Value_Struct_Operations *ops, const Eina_Value_Struct_Desc *desc, const void *memory); /**< How to copy struct memory from an existing Eina_Value, if not provided alloc() will be used, then every member is copied using eina_value_type_copy() with member's type. */
   int (*compare)(const Eina_Value_Struct_Operations *ops, const Eina_Value_Struct_Desc *desc, const void *data1, const void *data2); /**< How to compare two struct memories */
   const Eina_Value_Struct_Member *(*find_member)(const Eina_Value_Struct_Operations *ops, const Eina_Value_Struct_Desc *desc, const char *name); /**< How to find description for member. For huge structures consider using binary search, stringshared, hash or gperf. The default function does linear search using strcmp(). */
};

/**
 * @var EINA_VALUE_STRUCT_OPERATIONS_BINSEARCH
 *
 * Assumes @c members is sorted by name and applies binary search for
 * names.
 *
 * Ideally the @c member_count field is set to speed it up.
 *
 * No other methods are set (alloc, free, copy, compare), then it uses
 * the default operations.
 */
EAPI extern const Eina_Value_Struct_Operations *EINA_VALUE_STRUCT_OPERATIONS_BINSEARCH;

/**
 * @var EINA_VALUE_STRUCT_OPERATIONS_STRINGSHARE
 *
 * Assumes @c members name are stringshared and can be compared for
 * equality without using its contents (simple pointer comparison).
 *
 * Ideally the search @c name will be stringshared as well, but it
 * will do a second loop with a forced stringshare if it did not find
 * the member.
 *
 * No other methods are set (alloc, free, copy, compare), then it uses
 * the default operations.
 */
EAPI extern const Eina_Value_Struct_Operations *EINA_VALUE_STRUCT_OPERATIONS_STRINGSHARE;

/**
 * @struct _Eina_Value_Struct_Member
 * Describes a single member of struct.
 *
 * The name is used to lookup the member description. This is done as
 * specified as _Eina_Value_Struct_Operations::find_member(). For
 * structures with huge number of members, consider using a better
 * find_member function to quickly finding it! There are two helper
 * operations provided to help this: #EINA_VALUE_STRUCT_OPERATIONS_BINSEARCH
 * and #EINA_VALUE_STRUCT_OPERATIONS_STRINGSHARE, both depend on properly
 * set #_Eina_Value_Struct_Desc and #_Eina_Value_Struct_Member.
 *
 * @see #EINA_VALUE_STRUCT_MEMBER
 * @see #EINA_VALUE_STRUCT_MEMBER_SENTINEL
 *
 * @since 1.2
 */
struct _Eina_Value_Struct_Member
{
   const char *name; /**< member name, used in lookups such as eina_value_struct_get() */
   const Eina_Value_Type *type; /**< how to use this member */
   unsigned int offset; /**< where this member is located within the structure memory */
};

/**
 * @def EINA_VALUE_STRUCT_DESC_VERSION
 * Current API version, used to validate #_Eina_Value_Struct_Desc.
 */
#define EINA_VALUE_STRUCT_DESC_VERSION (1)

/**
 * @struct _Eina_Value_Struct_Desc
 * Describes the struct by listing its size, members and operations.
 *
 * This is the root of Eina_Value knowledge about the memory it's
 * handling as a structure. It adds introspection, saying the byte
 * size of the structure, its members and how to manage such members.
 *
 * @since 1.2
 */
struct _Eina_Value_Struct_Desc
{
   unsigned int version; /**< must be #EINA_VALUE_STRUCT_DESC_VERSION */
   const Eina_Value_Struct_Operations *ops; /**< operations, if @c NULL defaults will be used. You may use operations to optimize member lookup using binary search or gperf hash. */
   const Eina_Value_Struct_Member *members; /**< array of member descriptions, if @c member_count is zero, then it must be @c NULL terminated. */
   unsigned int member_count; /**< if > 0, specifies number of members. If zero then @c members must be NULL terminated. */
   unsigned int size; /**< byte size to allocate, may be bigger than sum of members */
};

/**
 * @def EINA_VALUE_STRUCT_MEMBER
 *
 * Helper to define Eina_Value_Struct_Member fields, uses offsetof()
 * with type and member.
 *
 * @since 1.2
 */
#define EINA_VALUE_STRUCT_MEMBER(eina_value_type, type, member) \
   {#member, eina_value_type, offsetof(type, member)}

/**
 * @def EINA_VALUE_STRUCT_MEMBER_SENTINEL
 *
 * Helper to define Eina_Value_Struct_Member fields for sentinel (last
 * item), useful if you did not define @c member_count.
 *
 * @since 1.2
 */
#define EINA_VALUE_STRUCT_MEMBER_SENTINEL {NULL, NULL, 0}


/**
 * @struct _Eina_Value_Struct
 * Used to store the memory and its description.
 * @since 1.2
 */
struct _Eina_Value_Struct
{
   const Eina_Value_Struct_Desc *desc; /**< How to manage the structure */
   void *memory; /**< The managed structure memory */
};

/**
 * @brief Create generic value storage of type struct.
 * @param desc how to manage this struct members.
 * @return The new value or @c NULL on failure.
 *
 * Create a new generic value storage of type struct. The members are
 * managed using the description specified by @a desc.
 *
 * On failure, @c NULL is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @note this creates from mempool and then uses
 *       eina_value_struct_setup().
 *
 * @see eina_value_free()
 * @see eina_value_struct_setup()
 *
 * @since 1.2
 */
EAPI Eina_Value *eina_value_struct_new(const Eina_Value_Struct_Desc *desc) EINA_ARG_NONNULL(1);

/**
 * @brief Initialize generic value storage of type struct.
 * @param value value object
 * @param desc how to manage this struct members.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * Initializes new generic value storage of type struct with the given
 * @a desc.
 *
 * This is the same as calling eina_value_set()
 * with #EINA_VALUE_TYPE_STRUCT followed by eina_value_pset() with
 * the #Eina_Value_Struct description configured.
 *
 * @note Existing contents are ignored! If the value was previously used, then
 *       use eina_value_flush() first.
 *
 * On failure, #EINA_FALSE is returned and #EINA_ERROR_OUT_OF_MEMORY
 * or #EINA_ERROR_VALUE_FAILED is set.
 *
 * @see eina_value_flush()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_setup(Eina_Value *value,
                                                const Eina_Value_Struct_Desc *desc) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Set the generic value in an struct member.
 * @param value source value object
 * @param name name to find the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The variable argument is dependent on chosen member type. The list
 * for basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char
 * @li EINA_VALUE_TYPE_USHORT: unsigned short
 * @li EINA_VALUE_TYPE_UINT: unsigned int
 * @li EINA_VALUE_TYPE_ULONG: unsigned long
 * @li EINA_VALUE_TYPE_UINT64: uint64_t
 * @li EINA_VALUE_TYPE_CHAR: char
 * @li EINA_VALUE_TYPE_SHORT: short
 * @li EINA_VALUE_TYPE_INT: int
 * @li EINA_VALUE_TYPE_LONG: long
 * @li EINA_VALUE_TYPE_INT64: int64_t
 * @li EINA_VALUE_TYPE_FLOAT: float
 * @li EINA_VALUE_TYPE_DOUBLE: double
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char *
 * @li EINA_VALUE_TYPE_STRING: const char *
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     struct myst {
 *         int i;
 *         char c;
 *     };
 *     const Eina_Value_Struct_Member myst_members[] = {
 *         {"i", EINA_VALUE_TYPE_INT, 0},
 *         {"c", EINA_VALUE_TYPE_CHAR, 4},
 *         {NULL, NULL, 0}
 *     };
 *     const Eina_Value_Struct_Desc myst_desc = {
 *         EINA_VALUE_STRUCT_DESC_VERSION,
 *         NULL, myst_members, 2, sizeof(struct myst)
 *     };
 *     Eina_Value *value = eina_value_struct_new(&my_desc);
 *     int x;
 *     char y;
 *
 *     eina_value_struct_set(value, "i", 5678);
 *     eina_value_struct_get(value, "i", &x);
 *     eina_value_struct_set(value, "c", 0xf);
 *     eina_value_struct_get(value, "c", &y);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_struct_get()
 * @see eina_value_struct_vset()
 * @see eina_value_struct_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_set(Eina_Value *value,
                                              const char *name,
                                              ...) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Get the generic value from an struct member.
 * @param value source value object
 * @param name name to find the member
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * The variable argument is dependent on chosen member type. The list
 * for basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     struct myst {
 *         int i;
 *         char c;
 *     };
 *     const Eina_Value_Struct_Member myst_members[] = {
 *         {"i", EINA_VALUE_TYPE_INT, 0},
 *         {"c", EINA_VALUE_TYPE_CHAR, 4},
 *         {NULL, NULL, 0}
 *     };
 *     const Eina_Value_Struct_Desc myst_desc = {
 *         EINA_VALUE_STRUCT_DESC_VERSION,
 *         NULL, myst_members, 2, sizeof(struct myst)
 *     };
 *     Eina_Value *value = eina_value_struct_new(&my_desc);
 *     int x;
 *     char y;
 *
 *     eina_value_struct_set(value, "i", 5678);
 *     eina_value_struct_get(value, "i", &x);
 *     eina_value_struct_set(value, "c", 0xf);
 *     eina_value_struct_get(value, "c", &y);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_struct_set()
 * @see eina_value_struct_vset()
 * @see eina_value_struct_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_get(const Eina_Value *value,
                                              const char *name,
                                              ...) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Set the generic value in an struct member.
 * @param value source value object
 * @param name name to find the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @see eina_value_struct_set()
 * @see eina_value_struct_get()
 * @see eina_value_struct_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_vset(Eina_Value *value,
                                               const char *name,
                                               va_list args) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Get the generic value from an struct member.
 * @param value source value object
 * @param name name to find the member
 * @param args variable argument
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in the variable argument parameter, the
 * actual value is type-dependent, but usually it will be what is
 * stored inside the object. There shouldn't be any memory allocation,
 * thus the contents should @b not be freed.
 *
 * @see eina_value_struct_vset()
 * @see eina_value_struct_get()
 * @see eina_value_struct_pget()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_vget(const Eina_Value *value,
                                               const char *name,
                                               va_list args) EINA_ARG_NONNULL(1, 2);

/**
 * @brief Set the generic value in an struct member from pointer.
 * @param value source value object
 * @param name name to find the member
 * @param ptr pointer to specify the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @note the pointer contents are written using the size defined by
 *       type. It can be larger than void* or uint64_t.
 *
 * @code
 *     struct myst {
 *         int i;
 *         char c;
 *     };
 *     const Eina_Value_Struct_Member myst_members[] = {
 *         {"i", EINA_VALUE_TYPE_INT, 0},
 *         {"c", EINA_VALUE_TYPE_CHAR, 4},
 *         {NULL, NULL, 0}
 *     };
 *     const Eina_Value_Struct_Desc myst_desc = {
 *         EINA_VALUE_STRUCT_DESC_VERSION,
 *         NULL, myst_members, 2, sizeof(struct myst)
 *     };
 *     Eina_Value *value = eina_value_struct_new(&my_desc);
 *     int x = 5678;
 *     char y = 0xf;
 *
 *     eina_value_struct_pset(value, "i", &);
 *     eina_value_struct_pget(value, "i", &x);
 *     eina_value_struct_pset(value, "c", &y);
 *     eina_value_struct_pget(value, "c", &y);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_struct_set()
 * @see eina_value_struct_get()
 * @see eina_value_struct_vset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_pset(Eina_Value *value,
                                               const char *name,
                                               const void *ptr) EINA_ARG_NONNULL(1, 2, 3);

/**
 * @brief Get the generic value to pointer from an struct member.
 * @param value source value object
 * @param name name to find the member
 * @param ptr pointer to receive the contents.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 *
 * The value is returned in pointer contents, the actual value is
 * type-dependent, but usually it will be what is stored inside the
 * object. There shouldn't be any memory allocation, thus the contents
 * should @b not be freed.
 *
 * The pointer type is dependent on chosen value type. The list for
 * basic types:
 *
 * @li EINA_VALUE_TYPE_UCHAR: unsigned char*
 * @li EINA_VALUE_TYPE_USHORT: unsigned short*
 * @li EINA_VALUE_TYPE_UINT: unsigned int*
 * @li EINA_VALUE_TYPE_ULONG: unsigned long*
 * @li EINA_VALUE_TYPE_UINT64: uint64_t*
 * @li EINA_VALUE_TYPE_CHAR: char*
 * @li EINA_VALUE_TYPE_SHORT: short*
 * @li EINA_VALUE_TYPE_INT: int*
 * @li EINA_VALUE_TYPE_LONG: long*
 * @li EINA_VALUE_TYPE_INT64: int64_t*
 * @li EINA_VALUE_TYPE_FLOAT: float*
 * @li EINA_VALUE_TYPE_DOUBLE: double*
 * @li EINA_VALUE_TYPE_STRINGSHARE: const char **
 * @li EINA_VALUE_TYPE_STRING: const char **
 * @li EINA_VALUE_TYPE_HASH: Eina_Value_Hash*
 * @li EINA_VALUE_TYPE_TIMEVAL: struct timeval*
 * @li EINA_VALUE_TYPE_BLOB: Eina_Value_Blob*
 * @li EINA_VALUE_TYPE_STRUCT: Eina_Value_Struct*
 *
 * @code
 *     struct myst {
 *         int i;
 *         char c;
 *     };
 *     const Eina_Value_Struct_Member myst_members[] = {
 *         {"i", EINA_VALUE_TYPE_INT, 0},
 *         {"c", EINA_VALUE_TYPE_CHAR, 4},
 *         {NULL, NULL, 0}
 *     };
 *     const Eina_Value_Struct_Desc myst_desc = {
 *         EINA_VALUE_STRUCT_DESC_VERSION,
 *         NULL, myst_members, 2, sizeof(struct myst)
 *     };
 *     Eina_Value *value = eina_value_struct_new(&my_desc);
 *     int x = 5678;
 *     char y = 0xf;
 *
 *     eina_value_struct_pset(value, "i", &);
 *     eina_value_struct_pget(value, "i", &x);
 *     eina_value_struct_pset(value, "c", &y);
 *     eina_value_struct_pget(value, "c", &y);
 *     eina_value_free(value);
 * @endcode
 *
 * @see eina_value_struct_set()
 * @see eina_value_struct_vset()
 * @see eina_value_struct_pset()
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_pget(const Eina_Value *value,
                                               const char *name,
                                               void *ptr) EINA_ARG_NONNULL(1, 2, 3);

/**
 * @brief Get the member as Eina_Value copy
 * @param src source value object
 * @param name name to find the member
 * @param dst where to return the member value.
 * @return #EINA_TRUE on success, #EINA_FALSE on failure.
 *
 * The argument @a dst is considered uninitialized and it's setup to
 * the type of the member.
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_value_get(const Eina_Value *src,
                                                    const char *name,
                                                    Eina_Value *dst) EINA_ARG_NONNULL(1, 2, 3);

/**
 * @brief Set the member from Eina_Value source
 * @param dst destination value object
 * @param name name to find the member
 * @param src source value
 * @return #EINA_TRUE on success, #EINA_FALSE on failure.
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_value_set(Eina_Value *dst,
                                                    const char *name,
                                                    const Eina_Value *src) EINA_ARG_NONNULL(1, 2, 3);

/**
 * @brief Get the member as Eina_Value copy given its member description.
 * @param src source value object
 * @param member the member description to use
 * @param dst where to return the member value.
 * @return #EINA_TRUE on success, #EINA_FALSE on failure.
 *
 * The argument @a dst is considered uninitialized and it's setup to
 * the type of the member.
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_member_value_get(const Eina_Value *src,
                                                           const Eina_Value_Struct_Member *member,
                                                           Eina_Value *dst) EINA_ARG_NONNULL(1, 2, 3);

/**
 * @brief Set the member from Eina_Value source
 * @param dst destination value object
 * @param member the member description to use
 * @param src source value
 * @return #EINA_TRUE on success, #EINA_FALSE on failure.
 *
 * @since 1.2
 */
static inline Eina_Bool eina_value_struct_member_value_set(Eina_Value *dst,
                                                           const Eina_Value_Struct_Member *member,
                                                           const Eina_Value *src) EINA_ARG_NONNULL(1, 2, 3);


/**
 * @}
 */


/**
 * @defgroup Eina_Value_Type_Group Generic Value Type management
 *
 * @{
 */

/**
 * @def EINA_VALUE_TYPE_VERSION
 * Current API version, used to validate type.
 */
#define EINA_VALUE_TYPE_VERSION (1)

/**
 * @struct _Eina_Value_Type
 * API to access values.
 *
 * @since 1.2
 */
struct _Eina_Value_Type
{
   unsigned int version; /**< must be #EINA_VALUE_TYPE_VERSION */
   unsigned int value_size; /**< byte size of value */
   const char *name; /**< name for debug and introspection */
   Eina_Bool (*setup)(const Eina_Value_Type *type, void *mem); /**< mem will be malloc(value_size) and should be configured */
   Eina_Bool (*flush)(const Eina_Value_Type *type, void *mem); /**< clear any values from mem */
   Eina_Bool (*copy)(const Eina_Value_Type *type, const void *src, void *dst); /**< how to copy values, both memory are @c value_size */
   int (*compare)(const Eina_Value_Type *type, const void *a, const void *b); /**< how to compare values, both memory are @c value_size */
   Eina_Bool (*convert_to)(const Eina_Value_Type *type, const Eina_Value_Type *convert, const void *type_mem, void *convert_mem); /**< how to convert values, both memory are @c value_size */
   Eina_Bool (*convert_from)(const Eina_Value_Type *type, const Eina_Value_Type *convert, void *type_mem, const void *convert_mem); /**< how to convert values, both memory are @c value_size */
   Eina_Bool (*vset)(const Eina_Value_Type *type, void *mem, va_list args); /**< how to set memory from variable argument */
   Eina_Bool (*pset)(const Eina_Value_Type *type, void *mem, const void *ptr); /**< how to set memory from pointer */
   Eina_Bool (*pget)(const Eina_Value_Type *type, const void *mem, void *ptr); /**< how to read memory */
};

/**
 * @brief Query type name.
 * @param type type reference.
 * @return string or @c NULL if type is invalid.
 * @since 1.2
 */
EAPI const char *eina_value_type_name_get(const Eina_Value_Type *type) EINA_PURE EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;

/**
 * @brief Check if type is valid.
 * @param type type reference.
 * @return #EINA_TRUE if valid, #EINA_FALSE otherwise.
 *
 * A type is invalid if it's NULL or if version field is not the same
 * as runtime #EINA_VALUE_TYPE_VERSION.
 *
 * @since 1.2
 */
EAPI Eina_Bool eina_value_type_check(const Eina_Value_Type *type) EINA_PURE EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;

/**
 * @brief Initialize memory using type descriptor.
 * @param type type reference.
 * @param mem memory to operate, must be of size @c type->value_size.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_setup(const Eina_Value_Type *type, void *mem);

/**
 * @brief Flush (clear) memory using type descriptor.
 * @param type type reference.
 * @param mem memory to operate, must be of size @c type->value_size.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_flush(const Eina_Value_Type *type, void *mem);

/**
 * @brief Copy memory using type descriptor.
 * @param type type reference.
 * @param src memory to operate, must be of size @c type->value_size.
 * @param dst memory to operate, must be of size @c type->value_size.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_copy(const Eina_Value_Type *type, const void *src, void *dst);

/**
 * @brief Compare memory using type descriptor.
 * @param type type reference.
 * @param a memory to operate, must be of size @c type->value_size.
 * @param b memory to operate, must be of size @c type->value_size.
 * @return less than zero if a < b, greater than zero if a > b, zero if equal.
 * @since 1.2
 */
static inline int eina_value_type_compare(const Eina_Value_Type *type, const void *a, const void *b);

/**
 * @brief Convert memory using type descriptor.
 * @param type type reference of the source.
 * @param convert type reference of the destination.
 * @param type_mem memory to operate, must be of size @c type->value_size.
 * @param convert_mem memory to operate, must be of size @c convert->value_size.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_convert_to(const Eina_Value_Type *type, const Eina_Value_Type *convert, const void *type_mem, void *convert_mem);

/**
 * @brief Convert memory using type descriptor.
 * @param type type reference of the destination.
 * @param convert type reference of the source.
 * @param type_mem memory to operate, must be of size @c type->value_size.
 * @param convert_mem memory to operate, must be of size @c convert->value_size.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_convert_from(const Eina_Value_Type *type, const Eina_Value_Type *convert, void *type_mem, const void *convert_mem);

/**
 * @brief Set memory using type descriptor and variable argument.
 * @param type type reference of the source.
 * @param mem memory to operate, must be of size @c type->value_size.
 * @param args input value.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_vset(const Eina_Value_Type *type, void *mem, va_list args);

/**
 * @brief Set memory using type descriptor and pointer.
 * @param type type reference of the source.
 * @param mem memory to operate, must be of size @c type->value_size.
 * @param ptr pointer to input value.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_pset(const Eina_Value_Type *type, void *mem, const void *ptr);

/**
 * @brief Get memory using type descriptor.
 * @param type type reference of the source.
 * @param mem memory to operate, must be of size @c type->value_size.
 * @param ptr pointer to output.
 * @return #EINA_TRUE on success, #EINA_FALSE otherwise.
 * @since 1.2
 */
static inline Eina_Bool eina_value_type_pget(const Eina_Value_Type *type, const void *mem, void *ptr);

/**
 * @}
 */

#include "eina_inline_value.x"

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */
#endif