This file is indexed.

/usr/share/doc/libplplot11/examples/d/x23d.d is in libplplot-dev 5.9.9-2ubuntu2.

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
// $Id: x23d.d 11684 2011-03-31 04:15:32Z airwin $
//
//  Displays Greek letters and mathematically interesting Unicode ranges
//  Copyright (C) 2005,2008 Alan Irwin
//  Copyright (C) 2005,2008 Andrew Ross
//
//
//  This file is part of PLplot.
//
//  PLplot is free software; you can redistribute it and/or modify
//  it under the terms of the GNU Library General Public License as published
//  by the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  PLplot 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 Library General Public License for more details.
//
//  You should have received a copy of the GNU Library General Public License
//  along with PLplot; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
//

import std.string;
import std.stdio;

import plplot;


//
// main
//
// Displays Greek letters and mathematically interesting Unicode ranges
//

static char[][] Greek = [
    "#gA", "#gB", "#gG", "#gD", "#gE", "#gZ", "#gY", "#gH", "#gI", "#gK", "#gL", "#gM",
    "#gN", "#gC", "#gO", "#gP", "#gR", "#gS", "#gT", "#gU", "#gF", "#gX", "#gQ", "#gW",
    "#ga", "#gb", "#gg", "#gd", "#ge", "#gz", "#gy", "#gh", "#gi", "#gk", "#gl", "#gm",
    "#gn", "#gc", "#go", "#gp", "#gr", "#gs", "#gt", "#gu", "#gf", "#gx", "#gq", "#gw"
];

static int[] Type1 = [
    0x0020, 0x0021, 0x0023, 0x0025, 0x0026,
    0x0028, 0x0029, 0x002b, 0x002c, 0x002e,
    0x002f, 0x0030, 0x0031, 0x0032, 0x0033,
    0x0034, 0x0035, 0x0036, 0x0037, 0x0038,
    0x0039, 0x003a, 0x003b, 0x003c, 0x003d,
    0x003e, 0x003f, 0x005b, 0x005d, 0x005f,
    0x007b, 0x007c, 0x007d, 0x00a9, 0x00ac,
    0x00ae, 0x00b0, 0x00b1, 0x00d7, 0x00f7,
    0x0192, 0x0391, 0x0392, 0x0393, 0x0394,
    0x0395, 0x0396, 0x0397, 0x0398, 0x0399,
    0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
    0x039f, 0x03a0, 0x03a1, 0x03a3, 0x03a4,
    0x03a5, 0x03a6, 0x03a7, 0x03a8, 0x03a9,
    0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5,
    0x03b6, 0x03b7, 0x03b8, 0x03b9, 0x03ba,
    0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
    0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4,
    0x03c5, 0x03c6, 0x03c7, 0x03c8, 0x03c9,
    0x03d1, 0x03d2, 0x03d5, 0x03d6, 0x2022,
    0x2026, 0x2032, 0x2033, 0x203e, 0x2044,
    0x2111, 0x2118, 0x211c, 0x2122, 0x2126,
    0x2135, 0x2190, 0x2191, 0x2192, 0x2193,
    0x2194, 0x21b5, 0x21d0, 0x21d1, 0x21d2,
    0x21d3, 0x21d4, 0x2200, 0x2202, 0x2203,
    0x2205, 0x2206, 0x2207, 0x2208, 0x2209,
    0x220b, 0x220f, 0x2211, 0x2212, 0x2215,
    0x2217, 0x221a, 0x221d, 0x221e, 0x2220,
    0x2227, 0x2228, 0x2229, 0x222a, 0x222b,
    0x2234, 0x223c, 0x2245, 0x2248, 0x2260,
    0x2261, 0x2264, 0x2265, 0x2282, 0x2283,
    0x2284, 0x2286, 0x2287, 0x2295, 0x2297,
    0x22a5, 0x22c5, 0x2320, 0x2321, 0x2329,
    0x232a, 0x25ca, 0x2660, 0x2663, 0x2665,
    0x2666
];

static char[][] title = [
    "#<0x10>PLplot Example 23 - Greek Letters",
    "#<0x10>PLplot Example 23 - Type 1 Symbol Font Glyphs by Unicode (a)",
    "#<0x10>PLplot Example 23 - Type 1 Symbol Font Glyphs by Unicode (b)",
    "#<0x10>PLplot Example 23 - Type 1 Symbol Font Glyphs by Unicode (c)",
    "#<0x10>PLplot Example 23 - Number Forms Unicode Block",
    "#<0x10>PLplot Example 23 - Arrows Unicode Block (a)",
    "#<0x10>PLplot Example 23 - Arrows Unicode Block (b)",
    "#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (a)",
    "#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (b)",
    "#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (c)",
    "#<0x10>PLplot Example 23 - Mathematical Operators Unicode Block (d)"
];

static int[] lo = [
    0x0,
    0x0,
    0x40,
    0x80,
    0x2153,
    0x2190,
    0x21d0,
    0x2200,
    0x2240,
    0x2280,
    0x22c0
];

static int[] hi = [
    0x30,
    0x40,
    0x80,
    0xA6,
    0x2184,
    0x21d0,
    0x2200,
    0x2240,
    0x2280,
    0x22c0,
    0x2300
];

static int[] nxcells = [
    12,
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8
];

static int[] nycells = [
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8,
    8
];

// non-zero values Must be consistent with nxcells and nycells.
static int[] offset = [
    0,
    0,
    64,
    128,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
];

// 30 possible FCI values.

const int          FCI_COMBINATIONS = 30;
static PLUNICODE[] fci = [
    0x80000000,
    0x80000001,
    0x80000002,
    0x80000003,
    0x80000004,
    0x80000010,
    0x80000011,
    0x80000012,
    0x80000013,
    0x80000014,
    0x80000020,
    0x80000021,
    0x80000022,
    0x80000023,
    0x80000024,
    0x80000100,
    0x80000101,
    0x80000102,
    0x80000103,
    0x80000104,
    0x80000110,
    0x80000111,
    0x80000112,
    0x80000113,
    0x80000114,
    0x80000120,
    0x80000121,
    0x80000122,
    0x80000123,
    0x80000124
];

static const char[][] family = [
    "sans-serif",
    "serif",
    "monospace",
    "script",
    "symbol"
];
static const char[][] style = [
    "upright",
    "italic",
    "oblique"
];
static const char[][] weight = [
    "medium",
    "bold"
];



int main( char[][] args )
{
    string cmdString;

    // Parse and process command line arguments
    plparseopts( args, PL_PARSE_FULL );

    plinit();

    for ( int page = 0; page < 11; page++ )
    {
        pladv( 0 );

        // Set up viewport and window
        plvpor( 0.02, 0.98, 0.02, 0.90 );
        plwind( 0.0, 1.0, 0.0, 1.0 );

        PLFLT xmin, xmax, ymin, ymax;
        plgspa( &xmin, &xmax, &ymin, &ymax );
        plschr( 0., 0.8 );
        PLFLT ycharacter_scale = ( 1.0 - 0.0 ) / ( ymax - ymin );

        // Factor should be 0.5, but heuristically it turns out to be larger.
        PLFLT chardef, charht;
        plgchr( &chardef, &charht );
        PLFLT yoffset = 1.0 * charht * ycharacter_scale;

        // Draw the grid using plbox
        plcol0( 2 );
        PLFLT deltax = 1.0 / nxcells[page];
        PLFLT deltay = 1.0 / nycells[page];
        plbox( "bcg", deltax, 0, "bcg", deltay, 0 );
        plcol0( 15 );

        int   length = hi[page] - lo[page];
        int   slice  = 0;
        PLFLT x, y;
        for ( int j = nycells[page] - 1; j >= -1; j-- )
        {
            y = ( 0.5 + j ) * deltay;
            for ( int i = 0; i < nxcells[page]; i++ )
            {
                x = ( 0.5 + i ) * deltax;
                if ( slice < length )
                {
                    if ( page == 0 )
                        cmdString = format( "#%s", Greek[slice] );
                    else if ( ( page >= 1 ) && ( page <= 3 ) )
                        cmdString = format( "##[0x%.4x]", Type1[offset[page] + slice] );
                    else if ( page >= 4 )
                        cmdString = format( "##[0x%.4x]", lo[page] + slice );
                    plptex( x, y + yoffset, 1., 0., 0.5, cmdString[1..cmdString.length] );
                    plptex( x, y - yoffset, 1., 0., 0.5, cmdString );
                }
                slice++;
            }
        }

        // Page title
        plschr( 0., 1.0 );
        plmtex( "t", 1.5, 0.5, 0.5, title[page] );
    }

    // Demonstrate methods of getting the current fonts
    PLUNICODE fci_old;
    plgfci( &fci_old );

    PLINT ifamily, istyle, iweight;
    plgfont( &ifamily, &istyle, &iweight );

    writefln( "For example 23 prior to page 12 the FCI is 0x%x", fci_old );
    writefln( "For example 23 prior to page 12 the font family, style and weight are %s %s %s", family[ifamily], style[istyle], weight[iweight] );

    for ( int page = 11; page < 16; page++ )
    {
        PLFLT  dy = 0.030;
        string text;

        pladv( 0 );
        plvpor( 0.02, 0.98, 0.02, 0.90 );
        plwind( 0.0, 1.0, 0.0, 1.0 );
        plsfci( 0 );
        if ( page == 11 )
            plmtex( "t", 1.5, 0.5, 0.5, "#<0x10>PLplot Example 23 - Set Font with plsfci" );
        else if ( page == 12 )
            plmtex( "t", 1.5, 0.5, 0.5, "#<0x10>PLplot Example 23 - Set Font with plsfont" );
        else if ( page == 13 )
            plmtex( "t", 1.5, 0.5, 0.5, "#<0x10>PLplot Example 23 - Set Font with ##<0x8nnnnnnn> construct" );
        else if ( page == 14 )
            plmtex( "t", 1.5, 0.5, 0.5, "#<0x10>PLplot Example 23 - Set Font with ##<0xmn> constructs" );
        else if ( page == 15 )
            plmtex( "t", 1.5, 0.5, 0.5, "#<0x10>PLplot Example 23 - Set Font with ##<FCI COMMAND STRING/> constructs" );

        plschr( 0., 0.75 );
        for ( int i = 0; i < FCI_COMBINATIONS; i++ )
        {
            int family_index = i % 5;
            int style_index  = ( i / 5 ) % 3;
            int weight_index = ( ( i / 5 ) / 3 ) % 2;

            if ( page == 11 )
            {
                plsfci( fci[i] );
                text = format( "Page 12, %s, %s, %s:  The quick brown fox jumps over the lazy dog",
                    family[family_index], style[style_index], weight[weight_index] );
            }
            else if ( page == 12 )
            {
                plsfont( family_index, style_index, weight_index );
                text = format( "Page 13, %s, %s, %s:  The quick brown fox jumps over the lazy dog",
                    family[family_index], style[style_index], weight[weight_index] );
            }
            else if ( page == 13 )
            {
                text = format( "Page 14, %s, %s, %s:  #<0x%x>The quick brown fox jumps over the lazy dog",
                    family[family_index], style[style_index], weight[weight_index], fci[i] );
            }
            else if ( page == 14 )
            {
                text = format( "Page 15, %s, %s, %s:  #<0x%1x0>#<0x%1x1>#<0x%1x2>"
                    "The quick brown fox jumps over the lazy dog",
                    family[family_index], style[style_index], weight[weight_index],
                    family_index, style_index, weight_index );
            }
            else if ( page == 15 )
            {
                text = format( "Page 16, %s, %s, %s:  #<%s/>#<%s/>#<%s/>"
                    "The quick brown fox jumps over the lazy dog",
                    family[family_index], style[style_index], weight[weight_index],
                    family[family_index], style[style_index], weight[weight_index] );
            }
            plptex( 0., 1. - ( i + 0.5 ) * dy, 1., 0., 0., text );
        }

        plschr( 0., 1.0 );
    }

    // Restore defaults
    plcol0( 1 );

    plend();
    return 0;
}