/usr/share/tcltk/tcllib1.18/yaml/json2huddle.tcl is in tcllib 1.18-dfsg-3.
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 | # -*- tcl -*-
# (c) 2015 Miguel Martínez López
package require Tcl 8.5
package require TclOO ; # For 8.5. Integrated with 8.6
package require try ; # For 8.5. Integrated with 8.6. Tcllib.
package require huddle 0.1.7
package provide huddle::json 0.1
namespace eval ::huddle {
namespace export json2huddle
proc json2huddle {jsonText} {
set huddle_object [::huddle::json::json2huddle parse $jsonText]
return $huddle_object
}
}
namespace eval ::huddle::json {
oo::class create Json2huddle {
variable cursor jsonText EndOfTextException numberRE
constructor {} {
if {[package vcompare [package present Tcl] 8.6] == 0} {
proc throw {code msg} {
return -code error -errorcode $code $msg
}
}
set positiveRE {[1-9][[:digit:]]*}
set cardinalRE "-?(?:$positiveRE|0)"
set fractionRE {[.][[:digit:]]+}
set exponentialRE {[eE][+-]?[[:digit:]]+}
set numberRE "${cardinalRE}(?:$fractionRE)?(?:$exponentialRE)?"
# Exception code for "End of Text" signal
set EndOfTextException 5
}
method parse {json_to_parse} {
set cursor -1
set jsonText $json_to_parse
my parse_next_json_data
}
method peekChar { {increment 1} } {
return [string index $jsonText [expr {$cursor+$increment}]]
}
method advanceCursor { {increment 1} } {
incr cursor $increment
}
method nextChar {} {
if {$cursor + 1 < [string length $jsonText] } {
incr cursor
return [string index $jsonText $cursor]
} else {
return -code $EndOfTextException
}
}
method assertNext {ch {target ""}} {
incr cursor
if {[string index $jsonText $cursor] != $ch} {
if {$target == ""} {
set target $ch
}
throw {HUDDLE JSONparser} "Trying to read the string $target at index $cursor."
}
}
method parse_next_json_data {} {
my eatWhitespace
set ch [my peekChar]
if {$ch eq ""} {
throw {HUDDLE JSONparser} {Nothing to read}
}
switch -exact -- $ch {
"\{" {
return [my readObject]
}
"\[" {
return [my readArray]
}
"\"" {
return [my readString]
}
"t" {
return [my readTrue]
}
"f" {
return [my readFalse]
}
"n" {
return [my readNull]
}
"/" {
my readComment
return [my parse_next_json_data]
}
"-" -
"0" -
"1" -
"2" -
"3" -
"4" -
"5" -
"6" -
"7" -
"8" -
"9" {
return [my readNumber]
}
default {
throw {HUDDLE JSONparser} "Input is not valid JSON: '$jsonText'"
}
}
}
method eatWhitespace {} {
while {true} {
set ch [my peekChar]
if {[string is space -strict $ch]} {
my advanceCursor
} elseif {$ch eq "/"} {
my readComment
} else {
break
}
}
}
method readTrue {} {
my assertNext t true
my assertNext r true
my assertNext u true
my assertNext e true
return [::huddle true]
}
method readFalse {} {
my assertNext f false
my assertNext a false
my assertNext l false
my assertNext s false
my assertNext e false
return [::huddle false]
}
method readNull {} {
my assertNext n null
my assertNext u null
my assertNext l null
my assertNext l null
return [::huddle null]
}
method readComment {} {
switch -exact -- [my peekChar 1][my peekChar 2] {
"//" {
my readDoubleSolidusComment
}
"/*" {
my readCStyleComment
}
default {
throw {HUDDLE JSONparser} "Not a valid JSON comment: $jsonText"
}
}
}
method readCStyleComment {} {
my assertNext "/" "/*"
my assertNext "*" "/*"
try {
while {true} {
set ch [my nextChar]
switch -exact -- $ch {
"*" {
if { [my peekChar] eq "/"} {
my advanceCursor
break
}
}
"/" {
if { [my peekChar] eq "*"} {
throw {HUDDLE JSONparser} "Not a valid JSON comment: $jsonText, '/*' cannot be embedded in the comment at index $cursor."
}
}
}
}
} on $EndOfTextException {} {
throw {HUDDLE JSONparser} "not a valid JSON comment: $jsonText, expected */"
}
}
method readDoubleSolidusComment {} {
my assertNext "/" "//"
my assertNext "/" "//"
try {
set ch [my nextChar]
while { $ch ne "\r" && $ch ne "\n"} {
set ch [my nextChar]
}
} on $EndOfTextException {} {}
}
method readArray {} {
my assertNext "\["
my eatWhitespace
if { [my peekChar] eq "\]"} {
my advanceCursor
return [huddle list]
}
try {
while {true} {
lappend result [my parse_next_json_data]
my eatWhitespace
set ch [my nextChar]
if {$ch eq "\]"} {
break
} else {
if {$ch ne ","} {
throw {HUDDLE JSONparser} "Not a valid JSON array: '$jsonText' due to: '$ch' at index $cursor."
}
my eatWhitespace
}
}
} on $EndOfTextException {} {
throw {HUDDLE JSONparser} "Not a valid JSON string: '$jsonText'"
}
return [huddle list {*}$result]
}
method readObject {} {
my assertNext "\{"
my eatWhitespace
if { [my peekChar] eq "\}"} {
my advanceCursor
return [huddle create]
}
try {
while {true} {
set key [my readStringLiteral]
my eatWhitespace
set ch [my nextChar]
if { $ch ne ":"} {
throw {HUDDLE JSONparser} "Not a valid JSON object: '$jsonText' due to: '$ch' at index $cursor."
}
my eatWhitespace
lappend result $key [my parse_next_json_data]
my eatWhitespace
set ch [my nextChar]
if {$ch eq "\}"} {
break
} else {
if {$ch ne ","} {
throw {HUDDLE JSONparser} "Not a valid JSON array: '$jsonText' due to: '$ch' at index $cursor."
}
my eatWhitespace
}
}
} on $EndOfTextException {} {
throw {HUDDLE JSONparser} "Not a valid JSON string: '$jsonText'"
}
return [huddle create {*}$result]
}
method readNumber {} {
regexp -start $cursor -- $numberRE $jsonText number
my advanceCursor [string length $number]
return [huddle number $number]
}
method readString {} {
set string [my readStringLiteral]
return [huddle string $string]
}
method readStringLiteral {} {
my assertNext "\""
set result ""
try {
while {true} {
set ch [my nextChar]
if {$ch eq "\""} break
if {$ch eq "\\"} {
set ch [my nextChar]
switch -exact -- $ch {
"b" {
set ch "\b"
}
"r" {
set ch "\r"
}
"n" {
set ch "\n"
}
"f" {
set ch "\f"
}
"t" {
set ch "\t"
}
"u" {
set ch [format "%c" 0x[my nextChar][my nextChar][my nextChar][my nextChar]]
}
"\"" {}
"/" {}
"\\" {}
default {
throw {HUDDLE JSONparser} "Not a valid escaped JSON character: '$ch' in $jsonText"
}
}
}
append result $ch
}
} on $EndOfTextException {} {
throw {HUDDLE JSONparser} "Not a valid JSON string: '$jsonText'"
}
return $result
}
}
Json2huddle create json2huddle
}
|