| 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2003, 2004, |
| 2 | * 2006, 2009, 2011, 2013 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public License |
| 6 | * as published by the Free Software Foundation; either version 3 of |
| 7 | * the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with this library; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 17 | * 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | \f |
| 22 | #ifdef HAVE_CONFIG_H |
| 23 | # include <config.h> |
| 24 | #endif |
| 25 | |
| 26 | #include <unistr.h> |
| 27 | |
| 28 | #include "libguile/_scm.h" |
| 29 | #include "libguile/chars.h" |
| 30 | #include "libguile/eval.h" |
| 31 | #include "libguile/hash.h" |
| 32 | #include "libguile/smob.h" |
| 33 | #include "libguile/variable.h" |
| 34 | #include "libguile/alist.h" |
| 35 | #include "libguile/fluids.h" |
| 36 | #include "libguile/strings.h" |
| 37 | #include "libguile/vectors.h" |
| 38 | #include "libguile/weak-set.h" |
| 39 | #include "libguile/modules.h" |
| 40 | #include "libguile/read.h" |
| 41 | #include "libguile/srfi-13.h" |
| 42 | |
| 43 | #include "libguile/validate.h" |
| 44 | #include "libguile/symbols.h" |
| 45 | |
| 46 | #include "libguile/private-options.h" |
| 47 | |
| 48 | |
| 49 | #ifdef HAVE_STRING_H |
| 50 | #include <string.h> |
| 51 | #endif |
| 52 | |
| 53 | \f |
| 54 | |
| 55 | static SCM symbols; |
| 56 | |
| 57 | #ifdef GUILE_DEBUG |
| 58 | SCM_DEFINE (scm_sys_symbols, "%symbols", 0, 0, 0, |
| 59 | (), |
| 60 | "Return the system symbol obarray.") |
| 61 | #define FUNC_NAME s_scm_sys_symbols |
| 62 | { |
| 63 | return symbols; |
| 64 | } |
| 65 | #undef FUNC_NAME |
| 66 | #endif |
| 67 | |
| 68 | \f |
| 69 | |
| 70 | /* {Symbols} |
| 71 | */ |
| 72 | |
| 73 | unsigned long |
| 74 | scm_i_hash_symbol (SCM obj, unsigned long n, void *closure) |
| 75 | { |
| 76 | return scm_i_symbol_hash (obj) % n; |
| 77 | } |
| 78 | |
| 79 | struct string_lookup_data |
| 80 | { |
| 81 | SCM string; |
| 82 | unsigned long string_hash; |
| 83 | }; |
| 84 | |
| 85 | static int |
| 86 | string_lookup_predicate_fn (SCM sym, void *closure) |
| 87 | { |
| 88 | struct string_lookup_data *data = closure; |
| 89 | |
| 90 | if (scm_i_symbol_hash (sym) == data->string_hash |
| 91 | && scm_i_symbol_length (sym) == scm_i_string_length (data->string)) |
| 92 | { |
| 93 | size_t n = scm_i_symbol_length (sym); |
| 94 | while (n--) |
| 95 | if (scm_i_symbol_ref (sym, n) != scm_i_string_ref (data->string, n)) |
| 96 | return 0; |
| 97 | return 1; |
| 98 | } |
| 99 | else |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static SCM |
| 104 | lookup_interned_symbol (SCM name, unsigned long raw_hash, SCM obarray) |
| 105 | { |
| 106 | struct string_lookup_data data; |
| 107 | |
| 108 | data.string = name; |
| 109 | data.string_hash = raw_hash; |
| 110 | |
| 111 | return scm_c_weak_set_lookup (obarray, raw_hash, |
| 112 | string_lookup_predicate_fn, |
| 113 | &data, SCM_BOOL_F); |
| 114 | } |
| 115 | |
| 116 | struct latin1_lookup_data |
| 117 | { |
| 118 | const char *str; |
| 119 | size_t len; |
| 120 | unsigned long string_hash; |
| 121 | }; |
| 122 | |
| 123 | static int |
| 124 | latin1_lookup_predicate_fn (SCM sym, void *closure) |
| 125 | { |
| 126 | struct latin1_lookup_data *data = closure; |
| 127 | |
| 128 | return scm_i_symbol_hash (sym) == data->string_hash |
| 129 | && scm_i_is_narrow_symbol (sym) |
| 130 | && scm_i_symbol_length (sym) == data->len |
| 131 | && strncmp (scm_i_symbol_chars (sym), data->str, data->len) == 0; |
| 132 | } |
| 133 | |
| 134 | static SCM |
| 135 | lookup_interned_latin1_symbol (const char *str, size_t len, |
| 136 | unsigned long raw_hash, |
| 137 | SCM obarray) |
| 138 | { |
| 139 | struct latin1_lookup_data data; |
| 140 | |
| 141 | data.str = str; |
| 142 | data.len = len; |
| 143 | data.string_hash = raw_hash; |
| 144 | |
| 145 | return scm_c_weak_set_lookup (obarray, raw_hash, |
| 146 | latin1_lookup_predicate_fn, |
| 147 | &data, SCM_BOOL_F); |
| 148 | } |
| 149 | |
| 150 | struct utf8_lookup_data |
| 151 | { |
| 152 | const char *str; |
| 153 | size_t len; |
| 154 | unsigned long string_hash; |
| 155 | }; |
| 156 | |
| 157 | static int |
| 158 | utf8_string_equals_wide_string (const scm_t_uint8 *narrow, size_t nlen, |
| 159 | const scm_t_wchar *wide, size_t wlen) |
| 160 | { |
| 161 | size_t byte_idx = 0, char_idx = 0; |
| 162 | |
| 163 | while (byte_idx < nlen && char_idx < wlen) |
| 164 | { |
| 165 | ucs4_t c; |
| 166 | int nbytes; |
| 167 | |
| 168 | nbytes = u8_mbtouc (&c, narrow + byte_idx, nlen - byte_idx); |
| 169 | if (nbytes == 0) |
| 170 | break; |
| 171 | else if (c == 0xfffd) |
| 172 | /* Bad UTF-8. */ |
| 173 | return 0; |
| 174 | else if (c != wide[char_idx]) |
| 175 | return 0; |
| 176 | |
| 177 | byte_idx += nbytes; |
| 178 | char_idx++; |
| 179 | } |
| 180 | |
| 181 | return byte_idx == nlen && char_idx == wlen; |
| 182 | } |
| 183 | |
| 184 | static int |
| 185 | utf8_lookup_predicate_fn (SCM sym, void *closure) |
| 186 | { |
| 187 | struct utf8_lookup_data *data = closure; |
| 188 | |
| 189 | if (scm_i_symbol_hash (sym) != data->string_hash) |
| 190 | return 0; |
| 191 | |
| 192 | if (scm_i_is_narrow_symbol (sym)) |
| 193 | return (scm_i_symbol_length (sym) == data->len |
| 194 | && strncmp (scm_i_symbol_chars (sym), data->str, data->len) == 0); |
| 195 | else |
| 196 | return utf8_string_equals_wide_string ((const scm_t_uint8 *) data->str, |
| 197 | data->len, |
| 198 | scm_i_symbol_wide_chars (sym), |
| 199 | scm_i_symbol_length (sym)); |
| 200 | } |
| 201 | |
| 202 | static SCM |
| 203 | lookup_interned_utf8_symbol (const char *str, size_t len, |
| 204 | unsigned long raw_hash, |
| 205 | SCM obarray) |
| 206 | { |
| 207 | struct utf8_lookup_data data; |
| 208 | |
| 209 | data.str = str; |
| 210 | data.len = len; |
| 211 | data.string_hash = raw_hash; |
| 212 | |
| 213 | return scm_c_weak_set_lookup (obarray, raw_hash, |
| 214 | utf8_lookup_predicate_fn, |
| 215 | &data, SCM_BOOL_F); |
| 216 | } |
| 217 | |
| 218 | static int |
| 219 | symbol_lookup_predicate_fn (SCM sym, void *closure) |
| 220 | { |
| 221 | SCM other = SCM_PACK_POINTER (closure); |
| 222 | |
| 223 | if (scm_i_symbol_hash (sym) == scm_i_symbol_hash (other) |
| 224 | && scm_i_symbol_length (sym) == scm_i_symbol_length (other)) |
| 225 | { |
| 226 | if (scm_i_is_narrow_symbol (sym)) |
| 227 | return scm_i_is_narrow_symbol (other) |
| 228 | && (strncmp (scm_i_symbol_chars (sym), |
| 229 | scm_i_symbol_chars (other), |
| 230 | scm_i_symbol_length (other)) == 0); |
| 231 | else |
| 232 | return scm_is_true |
| 233 | (scm_string_equal_p (scm_symbol_to_string (sym), |
| 234 | scm_symbol_to_string (other))); |
| 235 | } |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static SCM |
| 240 | scm_i_str2symbol (SCM str, SCM obarray) |
| 241 | { |
| 242 | SCM symbol; |
| 243 | size_t raw_hash = scm_i_string_hash (str); |
| 244 | |
| 245 | symbol = lookup_interned_symbol (str, raw_hash, obarray); |
| 246 | if (scm_is_true (symbol)) |
| 247 | return symbol; |
| 248 | else |
| 249 | { |
| 250 | /* The symbol was not found, create it. */ |
| 251 | symbol = scm_i_make_symbol (str, 0, raw_hash, |
| 252 | scm_cons (SCM_BOOL_F, SCM_EOL)); |
| 253 | |
| 254 | /* Might return a different symbol, if another one was interned at |
| 255 | the same time. */ |
| 256 | return scm_c_weak_set_add_x (obarray, raw_hash, |
| 257 | symbol_lookup_predicate_fn, |
| 258 | SCM_UNPACK_POINTER (symbol), symbol); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | |
| 263 | static SCM |
| 264 | scm_i_str2uninterned_symbol (SCM str) |
| 265 | { |
| 266 | size_t raw_hash = scm_i_string_hash (str); |
| 267 | |
| 268 | return scm_i_make_symbol (str, SCM_I_F_SYMBOL_UNINTERNED, |
| 269 | raw_hash, scm_cons (SCM_BOOL_F, SCM_EOL)); |
| 270 | } |
| 271 | |
| 272 | SCM_DEFINE (scm_symbol_p, "symbol?", 1, 0, 0, |
| 273 | (SCM obj), |
| 274 | "Return @code{#t} if @var{obj} is a symbol, otherwise return\n" |
| 275 | "@code{#f}.") |
| 276 | #define FUNC_NAME s_scm_symbol_p |
| 277 | { |
| 278 | return scm_from_bool (scm_is_symbol (obj)); |
| 279 | } |
| 280 | #undef FUNC_NAME |
| 281 | |
| 282 | SCM_DEFINE (scm_symbol_interned_p, "symbol-interned?", 1, 0, 0, |
| 283 | (SCM symbol), |
| 284 | "Return @code{#t} if @var{symbol} is interned, otherwise return\n" |
| 285 | "@code{#f}.") |
| 286 | #define FUNC_NAME s_scm_symbol_interned_p |
| 287 | { |
| 288 | SCM_VALIDATE_SYMBOL (1, symbol); |
| 289 | return scm_from_bool (scm_i_symbol_is_interned (symbol)); |
| 290 | } |
| 291 | #undef FUNC_NAME |
| 292 | |
| 293 | SCM_DEFINE (scm_make_symbol, "make-symbol", 1, 0, 0, |
| 294 | (SCM name), |
| 295 | "Return a new uninterned symbol with the name @var{name}. " |
| 296 | "The returned symbol is guaranteed to be unique and future " |
| 297 | "calls to @code{string->symbol} will not return it.") |
| 298 | #define FUNC_NAME s_scm_make_symbol |
| 299 | { |
| 300 | SCM_VALIDATE_STRING (1, name); |
| 301 | return scm_i_str2uninterned_symbol (name); |
| 302 | } |
| 303 | #undef FUNC_NAME |
| 304 | |
| 305 | SCM_DEFINE (scm_symbol_to_string, "symbol->string", 1, 0, 0, |
| 306 | (SCM s), |
| 307 | "Return the name of @var{symbol} as a string. If the symbol was\n" |
| 308 | "part of an object returned as the value of a literal expression\n" |
| 309 | "(section @pxref{Literal expressions,,,r5rs, The Revised^5\n" |
| 310 | "Report on Scheme}) or by a call to the @code{read} procedure,\n" |
| 311 | "and its name contains alphabetic characters, then the string\n" |
| 312 | "returned will contain characters in the implementation's\n" |
| 313 | "preferred standard case---some implementations will prefer\n" |
| 314 | "upper case, others lower case. If the symbol was returned by\n" |
| 315 | "@code{string->symbol}, the case of characters in the string\n" |
| 316 | "returned will be the same as the case in the string that was\n" |
| 317 | "passed to @code{string->symbol}. It is an error to apply\n" |
| 318 | "mutation procedures like @code{string-set!} to strings returned\n" |
| 319 | "by this procedure.\n" |
| 320 | "\n" |
| 321 | "The following examples assume that the implementation's\n" |
| 322 | "standard case is lower case:\n" |
| 323 | "\n" |
| 324 | "@lisp\n" |
| 325 | "(symbol->string 'flying-fish) @result{} \"flying-fish\"\n" |
| 326 | "(symbol->string 'Martin) @result{} \"martin\"\n" |
| 327 | "(symbol->string\n" |
| 328 | " (string->symbol \"Malvina\")) @result{} \"Malvina\"\n" |
| 329 | "@end lisp") |
| 330 | #define FUNC_NAME s_scm_symbol_to_string |
| 331 | { |
| 332 | SCM_VALIDATE_SYMBOL (1, s); |
| 333 | return scm_i_symbol_substring (s, 0, scm_i_symbol_length (s)); |
| 334 | } |
| 335 | #undef FUNC_NAME |
| 336 | |
| 337 | |
| 338 | SCM_DEFINE (scm_string_to_symbol, "string->symbol", 1, 0, 0, |
| 339 | (SCM string), |
| 340 | "Return the symbol whose name is @var{string}. This procedure\n" |
| 341 | "can create symbols with names containing special characters or\n" |
| 342 | "letters in the non-standard case, but it is usually a bad idea\n" |
| 343 | "to create such symbols because in some implementations of\n" |
| 344 | "Scheme they cannot be read as themselves. See\n" |
| 345 | "@code{symbol->string}.\n" |
| 346 | "\n" |
| 347 | "The following examples assume that the implementation's\n" |
| 348 | "standard case is lower case:\n" |
| 349 | "\n" |
| 350 | "@lisp\n" |
| 351 | "(eq? 'mISSISSIppi 'mississippi) @result{} #t\n" |
| 352 | "(string->symbol \"mISSISSIppi\") @result{} @r{the symbol with name \"mISSISSIppi\"}\n" |
| 353 | "(eq? 'bitBlt (string->symbol \"bitBlt\")) @result{} #f\n" |
| 354 | "(eq? 'JollyWog\n" |
| 355 | " (string->symbol (symbol->string 'JollyWog))) @result{} #t\n" |
| 356 | "(string=? \"K. Harper, M.D.\"\n" |
| 357 | " (symbol->string\n" |
| 358 | " (string->symbol \"K. Harper, M.D.\"))) @result{}#t\n" |
| 359 | "@end lisp") |
| 360 | #define FUNC_NAME s_scm_string_to_symbol |
| 361 | { |
| 362 | SCM_VALIDATE_STRING (1, string); |
| 363 | return scm_i_str2symbol (string, symbols); |
| 364 | } |
| 365 | #undef FUNC_NAME |
| 366 | |
| 367 | SCM_DEFINE (scm_string_ci_to_symbol, "string-ci->symbol", 1, 0, 0, |
| 368 | (SCM str), |
| 369 | "Return the symbol whose name is @var{str}. @var{str} is\n" |
| 370 | "converted to lowercase before the conversion is done, if Guile\n" |
| 371 | "is currently reading symbols case-insensitively.") |
| 372 | #define FUNC_NAME s_scm_string_ci_to_symbol |
| 373 | { |
| 374 | return scm_string_to_symbol (SCM_CASE_INSENSITIVE_P |
| 375 | ? scm_string_downcase(str) |
| 376 | : str); |
| 377 | } |
| 378 | #undef FUNC_NAME |
| 379 | |
| 380 | SCM_DEFINE (scm_make_obarray, "make-obarray", 0, 0, 0, |
| 381 | (void), |
| 382 | "Return a fresh obarray.") |
| 383 | #define FUNC_NAME s_scm_make_obarray |
| 384 | { |
| 385 | return scm_c_make_weak_set (0); |
| 386 | } |
| 387 | #undef FUNC_NAME |
| 388 | |
| 389 | SCM_DEFINE (scm_find_symbol, "find-symbol", 1, 1, 0, |
| 390 | (SCM string, SCM obarray), |
| 391 | "Return the symbol named @var{string} if it is present in\n" |
| 392 | "@var{obarray}. Return false otherwise.") |
| 393 | #define FUNC_NAME s_scm_find_symbol |
| 394 | { |
| 395 | if (SCM_UNBNDP (obarray)) |
| 396 | obarray = symbols; |
| 397 | |
| 398 | return lookup_interned_symbol (string, |
| 399 | scm_i_string_hash (string), |
| 400 | obarray); |
| 401 | } |
| 402 | #undef FUNC_NAME |
| 403 | |
| 404 | SCM_DEFINE (scm_intern, "intern", 1, 1, 0, |
| 405 | (SCM string, SCM obarray), |
| 406 | "Intern @var{string} in @var{obarray}.") |
| 407 | #define FUNC_NAME s_scm_intern |
| 408 | { |
| 409 | if (SCM_UNBNDP (obarray)) |
| 410 | obarray = symbols; |
| 411 | |
| 412 | SCM_VALIDATE_STRING (1, string); |
| 413 | return scm_i_str2symbol (string, obarray); |
| 414 | } |
| 415 | #undef FUNC_NAME |
| 416 | |
| 417 | SCM_DEFINE (scm_unintern, "unintern", 1, 1, 0, |
| 418 | (SCM symbol, SCM obarray), |
| 419 | "Unintern @var{symbol} from @var{obarray}.") |
| 420 | #define FUNC_NAME s_scm_unintern |
| 421 | { |
| 422 | if (SCM_UNBNDP (obarray)) |
| 423 | obarray = symbols; |
| 424 | |
| 425 | scm_weak_set_remove_x (obarray, symbol); |
| 426 | return SCM_UNSPECIFIED; |
| 427 | } |
| 428 | #undef FUNC_NAME |
| 429 | |
| 430 | SCM_DEFINE (scm_obarray_for_each, "obarray-for-each", 1, 1, 0, |
| 431 | (SCM proc, SCM obarray), |
| 432 | "") |
| 433 | #define FUNC_NAME s_scm_obarray_for_each |
| 434 | { |
| 435 | if (SCM_UNBNDP (obarray)) |
| 436 | obarray = symbols; |
| 437 | |
| 438 | scm_weak_set_for_each (proc, obarray); |
| 439 | return SCM_UNSPECIFIED; |
| 440 | } |
| 441 | #undef FUNC_NAME |
| 442 | |
| 443 | /* The default prefix for `gensym'd symbols. */ |
| 444 | static SCM default_gensym_prefix; |
| 445 | |
| 446 | #define MAX_PREFIX_LENGTH 30 |
| 447 | |
| 448 | SCM_DEFINE (scm_gensym, "gensym", 0, 1, 0, |
| 449 | (SCM prefix), |
| 450 | "Create a new symbol with a name constructed from a prefix and\n" |
| 451 | "a counter value. The string @var{prefix} can be specified as\n" |
| 452 | "an optional argument. Default prefix is @code{ g}. The counter\n" |
| 453 | "is increased by 1 at each call. There is no provision for\n" |
| 454 | "resetting the counter.") |
| 455 | #define FUNC_NAME s_scm_gensym |
| 456 | { |
| 457 | static int gensym_counter = 0; |
| 458 | |
| 459 | SCM suffix, name; |
| 460 | int n, n_digits; |
| 461 | char buf[SCM_INTBUFLEN]; |
| 462 | |
| 463 | if (SCM_UNBNDP (prefix)) |
| 464 | prefix = default_gensym_prefix; |
| 465 | |
| 466 | /* mutex in case another thread looks and incs at the exact same moment */ |
| 467 | scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex); |
| 468 | n = gensym_counter++; |
| 469 | scm_i_pthread_mutex_unlock (&scm_i_misc_mutex); |
| 470 | |
| 471 | n_digits = scm_iint2str (n, 10, buf); |
| 472 | suffix = scm_from_latin1_stringn (buf, n_digits); |
| 473 | name = scm_string_append (scm_list_2 (prefix, suffix)); |
| 474 | return scm_string_to_symbol (name); |
| 475 | } |
| 476 | #undef FUNC_NAME |
| 477 | |
| 478 | SCM_DEFINE (scm_symbol_hash, "symbol-hash", 1, 0, 0, |
| 479 | (SCM symbol), |
| 480 | "Return a hash value for @var{symbol}.") |
| 481 | #define FUNC_NAME s_scm_symbol_hash |
| 482 | { |
| 483 | SCM_VALIDATE_SYMBOL (1, symbol); |
| 484 | return scm_from_ulong (scm_i_symbol_hash (symbol)); |
| 485 | } |
| 486 | #undef FUNC_NAME |
| 487 | |
| 488 | SCM_DEFINE (scm_symbol_fref, "symbol-fref", 1, 0, 0, |
| 489 | (SCM s), |
| 490 | "Return the contents of the symbol @var{s}'s @dfn{function slot}.") |
| 491 | #define FUNC_NAME s_scm_symbol_fref |
| 492 | { |
| 493 | SCM_VALIDATE_SYMBOL (1, s); |
| 494 | return SCM_CAR (SCM_CELL_OBJECT_3 (s)); |
| 495 | } |
| 496 | #undef FUNC_NAME |
| 497 | |
| 498 | |
| 499 | SCM_DEFINE (scm_symbol_pref, "symbol-pref", 1, 0, 0, |
| 500 | (SCM s), |
| 501 | "Return the @dfn{property list} currently associated with the\n" |
| 502 | "symbol @var{s}.") |
| 503 | #define FUNC_NAME s_scm_symbol_pref |
| 504 | { |
| 505 | SCM_VALIDATE_SYMBOL (1, s); |
| 506 | return SCM_CDR (SCM_CELL_OBJECT_3 (s)); |
| 507 | } |
| 508 | #undef FUNC_NAME |
| 509 | |
| 510 | |
| 511 | SCM_DEFINE (scm_symbol_fset_x, "symbol-fset!", 2, 0, 0, |
| 512 | (SCM s, SCM val), |
| 513 | "Change the binding of the symbol @var{s}'s function slot.") |
| 514 | #define FUNC_NAME s_scm_symbol_fset_x |
| 515 | { |
| 516 | SCM_VALIDATE_SYMBOL (1, s); |
| 517 | SCM_SETCAR (SCM_CELL_OBJECT_3 (s), val); |
| 518 | return SCM_UNSPECIFIED; |
| 519 | } |
| 520 | #undef FUNC_NAME |
| 521 | |
| 522 | |
| 523 | SCM_DEFINE (scm_symbol_pset_x, "symbol-pset!", 2, 0, 0, |
| 524 | (SCM s, SCM val), |
| 525 | "Change the binding of the symbol @var{s}'s property slot.") |
| 526 | #define FUNC_NAME s_scm_symbol_pset_x |
| 527 | { |
| 528 | SCM_VALIDATE_SYMBOL (1, s); |
| 529 | SCM_SETCDR (SCM_CELL_OBJECT_3 (s), val); |
| 530 | return SCM_UNSPECIFIED; |
| 531 | } |
| 532 | #undef FUNC_NAME |
| 533 | |
| 534 | SCM |
| 535 | scm_from_locale_symbol (const char *sym) |
| 536 | { |
| 537 | return scm_from_locale_symboln (sym, -1); |
| 538 | } |
| 539 | |
| 540 | SCM |
| 541 | scm_from_locale_symboln (const char *sym, size_t len) |
| 542 | { |
| 543 | SCM str = scm_from_locale_stringn (sym, len); |
| 544 | return scm_i_str2symbol (str, symbols); |
| 545 | } |
| 546 | |
| 547 | SCM |
| 548 | scm_take_locale_symboln (char *sym, size_t len) |
| 549 | { |
| 550 | SCM str; |
| 551 | |
| 552 | str = scm_take_locale_stringn (sym, len); |
| 553 | return scm_i_str2symbol (str, symbols); |
| 554 | } |
| 555 | |
| 556 | SCM |
| 557 | scm_take_locale_symbol (char *sym) |
| 558 | { |
| 559 | return scm_take_locale_symboln (sym, (size_t)-1); |
| 560 | } |
| 561 | |
| 562 | SCM |
| 563 | scm_from_latin1_symbol (const char *sym) |
| 564 | { |
| 565 | return scm_from_latin1_symboln (sym, -1); |
| 566 | } |
| 567 | |
| 568 | SCM |
| 569 | scm_from_latin1_symboln (const char *sym, size_t len) |
| 570 | { |
| 571 | unsigned long hash; |
| 572 | SCM ret; |
| 573 | |
| 574 | if (len == (size_t) -1) |
| 575 | len = strlen (sym); |
| 576 | hash = scm_i_latin1_string_hash (sym, len); |
| 577 | |
| 578 | ret = lookup_interned_latin1_symbol (sym, len, hash, symbols); |
| 579 | if (scm_is_false (ret)) |
| 580 | { |
| 581 | SCM str = scm_from_latin1_stringn (sym, len); |
| 582 | ret = scm_i_str2symbol (str, symbols); |
| 583 | } |
| 584 | |
| 585 | return ret; |
| 586 | } |
| 587 | |
| 588 | SCM |
| 589 | scm_from_utf8_symbol (const char *sym) |
| 590 | { |
| 591 | return scm_from_utf8_symboln (sym, -1); |
| 592 | } |
| 593 | |
| 594 | SCM |
| 595 | scm_from_utf8_symboln (const char *sym, size_t len) |
| 596 | { |
| 597 | unsigned long hash; |
| 598 | SCM ret; |
| 599 | |
| 600 | if (len == (size_t) -1) |
| 601 | len = strlen (sym); |
| 602 | hash = scm_i_utf8_string_hash (sym, len); |
| 603 | |
| 604 | ret = lookup_interned_utf8_symbol (sym, len, hash, symbols); |
| 605 | if (scm_is_false (ret)) |
| 606 | { |
| 607 | SCM str = scm_from_utf8_stringn (sym, len); |
| 608 | ret = scm_i_str2symbol (str, symbols); |
| 609 | } |
| 610 | |
| 611 | return ret; |
| 612 | } |
| 613 | |
| 614 | void |
| 615 | scm_symbols_prehistory () |
| 616 | { |
| 617 | symbols = scm_c_make_weak_set (5000); |
| 618 | } |
| 619 | |
| 620 | |
| 621 | void |
| 622 | scm_init_symbols () |
| 623 | { |
| 624 | #include "libguile/symbols.x" |
| 625 | |
| 626 | default_gensym_prefix = scm_from_latin1_string (" g"); |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | Local Variables: |
| 631 | c-file-style: "gnu" |
| 632 | End: |
| 633 | */ |