| 1 | /* utf8.c |
| 2 | * |
| 3 | * Copyright (c) 1998-2000, Larry Wall |
| 4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * 'What a fix!' said Sam. 'That's the one place in all the lands we've ever |
| 12 | * heard of that we don't want to see any closer; and that's the one place |
| 13 | * we're trying to get to! And that's just where we can't get, nohow.' |
| 14 | * |
| 15 | * 'Well do I understand your speech,' he answered in the same language; |
| 16 | * 'yet few strangers do so. Why then do you not speak in the Common Tongue, |
| 17 | * as is the custom in the West, if you wish to be answered?' |
| 18 | * |
| 19 | * ...the travellers perceived that the floor was paved with stones of many |
| 20 | * hues; branching runes and strange devices intertwined beneath their feet. |
| 21 | */ |
| 22 | |
| 23 | #include "EXTERN.h" |
| 24 | #define PERL_IN_UTF8_C |
| 25 | #include "perl.h" |
| 26 | |
| 27 | /* Unicode support */ |
| 28 | |
| 29 | U8 * |
| 30 | Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) /* the d must be UTF8_MAXLEN+1 deep */ |
| 31 | { |
| 32 | if (uv < 0x80) { |
| 33 | *d++ = uv; |
| 34 | *d = 0; |
| 35 | return d; |
| 36 | } |
| 37 | if (uv < 0x800) { |
| 38 | *d++ = (( uv >> 6) | 0xc0); |
| 39 | *d++ = (( uv & 0x3f) | 0x80); |
| 40 | *d = 0; |
| 41 | return d; |
| 42 | } |
| 43 | if (uv < 0x10000) { |
| 44 | *d++ = (( uv >> 12) | 0xe0); |
| 45 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 46 | *d++ = (( uv & 0x3f) | 0x80); |
| 47 | *d = 0; |
| 48 | return d; |
| 49 | } |
| 50 | if (uv < 0x200000) { |
| 51 | *d++ = (( uv >> 18) | 0xf0); |
| 52 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
| 53 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 54 | *d++ = (( uv & 0x3f) | 0x80); |
| 55 | *d = 0; |
| 56 | return d; |
| 57 | } |
| 58 | if (uv < 0x4000000) { |
| 59 | *d++ = (( uv >> 24) | 0xf8); |
| 60 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
| 61 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
| 62 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 63 | *d++ = (( uv & 0x3f) | 0x80); |
| 64 | *d = 0; |
| 65 | return d; |
| 66 | } |
| 67 | if (uv < 0x80000000) { |
| 68 | *d++ = (( uv >> 30) | 0xfc); |
| 69 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
| 70 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
| 71 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
| 72 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 73 | *d++ = (( uv & 0x3f) | 0x80); |
| 74 | *d = 0; |
| 75 | return d; |
| 76 | } |
| 77 | #ifdef HAS_QUAD |
| 78 | if (uv < UTF8_QUAD_MAX) |
| 79 | #endif |
| 80 | { |
| 81 | *d++ = 0xfe; /* Can't match U+FEFF! */ |
| 82 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
| 83 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
| 84 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
| 85 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
| 86 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 87 | *d++ = (( uv & 0x3f) | 0x80); |
| 88 | *d = 0; |
| 89 | return d; |
| 90 | } |
| 91 | #ifdef HAS_QUAD |
| 92 | { |
| 93 | *d++ = 0xff; /* Can't match U+FFFE! */ |
| 94 | *d++ = 0x80; /* 6 Reserved bits */ |
| 95 | *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ |
| 96 | *d++ = (((uv >> 54) & 0x3f) | 0x80); |
| 97 | *d++ = (((uv >> 48) & 0x3f) | 0x80); |
| 98 | *d++ = (((uv >> 42) & 0x3f) | 0x80); |
| 99 | *d++ = (((uv >> 36) & 0x3f) | 0x80); |
| 100 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
| 101 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
| 102 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
| 103 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
| 104 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 105 | *d++ = (( uv & 0x3f) | 0x80); |
| 106 | *d = 0; |
| 107 | return d; |
| 108 | } |
| 109 | #endif |
| 110 | } |
| 111 | |
| 112 | /* Tests if some arbitrary number of bytes begins in a valid UTF-8 character. |
| 113 | * The actual number of bytes in the UTF-8 character will be returned if it |
| 114 | * is valid, otherwise 0. */ |
| 115 | STRLEN |
| 116 | Perl_is_utf8_char(pTHX_ U8 *s) |
| 117 | { |
| 118 | U8 u = *s; |
| 119 | STRLEN slen, len; |
| 120 | UV uv, ouv; |
| 121 | |
| 122 | if (u <= 0x7f) |
| 123 | return 1; |
| 124 | |
| 125 | if (u >= 0x80 && u <= 0xbf) |
| 126 | return 0; |
| 127 | |
| 128 | len = UTF8SKIP(s); |
| 129 | |
| 130 | if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80)) |
| 131 | return 0; |
| 132 | |
| 133 | slen = len - 1; |
| 134 | s++; |
| 135 | uv = u; |
| 136 | ouv = uv; |
| 137 | while (slen--) { |
| 138 | if ((*s & 0xc0) != 0x80) |
| 139 | return 0; |
| 140 | uv = UTF8_ACCUMULATE(uv, *s); |
| 141 | if (uv < ouv) |
| 142 | return 0; |
| 143 | ouv = uv; |
| 144 | s++; |
| 145 | } |
| 146 | |
| 147 | if (UNISKIP(uv) < len) |
| 148 | return 0; |
| 149 | |
| 150 | return len; |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | =for apidoc Am|is_utf8_string|U8 *s|STRLEN len |
| 155 | |
| 156 | Returns true if first C<len> bytes of the given string form valid a UTF8 |
| 157 | string, false otherwise. |
| 158 | |
| 159 | =cut |
| 160 | */ |
| 161 | |
| 162 | bool |
| 163 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
| 164 | { |
| 165 | U8* x = s; |
| 166 | U8* send = s + len; |
| 167 | STRLEN c; |
| 168 | |
| 169 | while (x < send) { |
| 170 | c = is_utf8_char(x); |
| 171 | if (!c) |
| 172 | return FALSE; |
| 173 | x += c; |
| 174 | if (x > send) |
| 175 | return FALSE; |
| 176 | } |
| 177 | |
| 178 | return TRUE; |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | =for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags |
| 183 | |
| 184 | Returns the character value of the first character in the string C<s> |
| 185 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
| 186 | C<retlen> will be set to the length, in bytes, of that character. |
| 187 | |
| 188 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
| 189 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
| 190 | it is assumed that the caller will raise a warning, and this function |
| 191 | will silently just set C<retlen> to C<-1> and return zero. If the |
| 192 | C<flags> does not contain UTF8_CHECK_ONLY, warnings about |
| 193 | malformations will be given, C<retlen> will be set to the expected |
| 194 | length of the UTF-8 character in bytes, and zero will be returned. |
| 195 | |
| 196 | The C<flags> can also contain various flags to allow deviations from |
| 197 | the strict UTF-8 encoding (see F<utf8.h>). |
| 198 | |
| 199 | =cut */ |
| 200 | |
| 201 | UV |
| 202 | Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags) |
| 203 | { |
| 204 | UV uv = *s, ouv; |
| 205 | STRLEN len = 1; |
| 206 | #ifdef EBCDIC |
| 207 | bool dowarn = 0; |
| 208 | #else |
| 209 | bool dowarn = ckWARN_d(WARN_UTF8); |
| 210 | #endif |
| 211 | STRLEN expectlen = 0; |
| 212 | |
| 213 | if (curlen == 0) { |
| 214 | if (dowarn) |
| 215 | Perl_warner(aTHX_ WARN_UTF8, |
| 216 | "Malformed UTF-8 character (an empty string)"); |
| 217 | goto malformed; |
| 218 | } |
| 219 | |
| 220 | if (UTF8_IS_ASCII(uv)) { |
| 221 | if (retlen) |
| 222 | *retlen = 1; |
| 223 | return *s; |
| 224 | } |
| 225 | |
| 226 | if (UTF8_IS_CONTINUATION(uv) && |
| 227 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
| 228 | if (dowarn) |
| 229 | Perl_warner(aTHX_ WARN_UTF8, |
| 230 | "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")", |
| 231 | uv); |
| 232 | goto malformed; |
| 233 | } |
| 234 | |
| 235 | if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) && |
| 236 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
| 237 | if (dowarn) |
| 238 | Perl_warner(aTHX_ WARN_UTF8, |
| 239 | "Malformed UTF-8 character (unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")", |
| 240 | (UV)s[1], uv); |
| 241 | goto malformed; |
| 242 | } |
| 243 | |
| 244 | if ((uv == 0xfe || uv == 0xff) && |
| 245 | !(flags & UTF8_ALLOW_FE_FF)) { |
| 246 | if (dowarn) |
| 247 | Perl_warner(aTHX_ WARN_UTF8, |
| 248 | "Malformed UTF-8 character (byte 0x%02"UVxf")", |
| 249 | uv); |
| 250 | goto malformed; |
| 251 | } |
| 252 | |
| 253 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
| 254 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } |
| 255 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } |
| 256 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } |
| 257 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
| 258 | else if (!(uv & 0x01)) { len = 7; uv = 0; } |
| 259 | else { len = 13; uv = 0; } /* whoa! */ |
| 260 | |
| 261 | if (retlen) |
| 262 | *retlen = len; |
| 263 | |
| 264 | expectlen = len; |
| 265 | |
| 266 | if ((curlen < expectlen) && |
| 267 | !(flags & UTF8_ALLOW_SHORT)) { |
| 268 | if (dowarn) |
| 269 | Perl_warner(aTHX_ WARN_UTF8, |
| 270 | "Malformed UTF-8 character (%d byte%s, need %d)", |
| 271 | curlen, curlen == 1 ? "" : "s", expectlen); |
| 272 | goto malformed; |
| 273 | } |
| 274 | |
| 275 | len--; |
| 276 | s++; |
| 277 | ouv = uv; |
| 278 | |
| 279 | while (len--) { |
| 280 | if (!UTF8_IS_CONTINUATION(*s) && |
| 281 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
| 282 | if (dowarn) |
| 283 | Perl_warner(aTHX_ WARN_UTF8, |
| 284 | "Malformed UTF-8 character (unexpected non-continuation byte 0x%02x)", |
| 285 | *s); |
| 286 | goto malformed; |
| 287 | } |
| 288 | else |
| 289 | uv = UTF8_ACCUMULATE(uv, *s); |
| 290 | if (uv < ouv) { |
| 291 | /* This cannot be allowed. */ |
| 292 | if (dowarn) |
| 293 | Perl_warner(aTHX_ WARN_UTF8, |
| 294 | "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)", |
| 295 | ouv, *s); |
| 296 | goto malformed; |
| 297 | } |
| 298 | s++; |
| 299 | ouv = uv; |
| 300 | } |
| 301 | |
| 302 | if (UNICODE_IS_SURROGATE(uv) && |
| 303 | !(flags & UTF8_ALLOW_SURROGATE)) { |
| 304 | if (dowarn) |
| 305 | Perl_warner(aTHX_ WARN_UTF8, |
| 306 | "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")", |
| 307 | uv); |
| 308 | goto malformed; |
| 309 | } else if (UNICODE_IS_BYTE_ORDER_MARK(uv) && |
| 310 | !(flags & UTF8_ALLOW_BOM)) { |
| 311 | if (dowarn) |
| 312 | Perl_warner(aTHX_ WARN_UTF8, |
| 313 | "Malformed UTF-8 character (byte order mark 0x%04"UVxf")", |
| 314 | uv); |
| 315 | goto malformed; |
| 316 | } else if ((expectlen > UNISKIP(uv)) && |
| 317 | !(flags & UTF8_ALLOW_LONG)) { |
| 318 | if (dowarn) |
| 319 | Perl_warner(aTHX_ WARN_UTF8, |
| 320 | "Malformed UTF-8 character (%d byte%s, need %d)", |
| 321 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
| 322 | goto malformed; |
| 323 | } else if (UNICODE_IS_ILLEGAL(uv) && |
| 324 | !(flags & UTF8_ALLOW_FFFF)) { |
| 325 | if (dowarn) |
| 326 | Perl_warner(aTHX_ WARN_UTF8, |
| 327 | "Malformed UTF-8 character (character 0x%04"UVxf")", |
| 328 | uv); |
| 329 | goto malformed; |
| 330 | } |
| 331 | |
| 332 | return uv; |
| 333 | |
| 334 | malformed: |
| 335 | |
| 336 | if (flags & UTF8_CHECK_ONLY) { |
| 337 | if (retlen) |
| 338 | *retlen = -1; |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | if (retlen) |
| 343 | *retlen = expectlen ? expectlen : len; |
| 344 | |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | =for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen |
| 350 | |
| 351 | Returns the character value of the first character in the string C<s> |
| 352 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
| 353 | length, in bytes, of that character. |
| 354 | |
| 355 | If C<s> does not point to a well-formed UTF8 character, zero is |
| 356 | returned and retlen is set, if possible, to -1. |
| 357 | |
| 358 | =cut |
| 359 | */ |
| 360 | |
| 361 | UV |
| 362 | Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen) |
| 363 | { |
| 364 | return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
| 365 | } |
| 366 | |
| 367 | /* |
| 368 | =for apidoc Am|STRLEN|utf8_length|U8* s|U8 *e |
| 369 | |
| 370 | Return the length of the UTF-8 char encoded string C<s> in characters. |
| 371 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
| 372 | up past C<e>, croaks. |
| 373 | |
| 374 | =cut |
| 375 | */ |
| 376 | |
| 377 | STRLEN |
| 378 | Perl_utf8_length(pTHX_ U8* s, U8* e) |
| 379 | { |
| 380 | STRLEN len = 0; |
| 381 | |
| 382 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
| 383 | * the bitops (especially ~) can create illegal UTF-8. |
| 384 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
| 385 | |
| 386 | if (e < s) |
| 387 | Perl_croak(aTHX_ "panic: utf8_length: unexpected end"); |
| 388 | while (s < e) { |
| 389 | U8 t = UTF8SKIP(s); |
| 390 | |
| 391 | if (e - s < t) |
| 392 | Perl_croak(aTHX_ "panic: utf8_length: unaligned end"); |
| 393 | s += t; |
| 394 | len++; |
| 395 | } |
| 396 | |
| 397 | return len; |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | =for apidoc Am|IV|utf8_distance|U8 *a|U8 *b |
| 402 | |
| 403 | Returns the number of UTF8 characters between the UTF-8 pointers C<a> |
| 404 | and C<b>. |
| 405 | |
| 406 | WARNING: use only if you *know* that the pointers point inside the |
| 407 | same UTF-8 buffer. |
| 408 | |
| 409 | =cut */ |
| 410 | |
| 411 | IV |
| 412 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
| 413 | { |
| 414 | IV off = 0; |
| 415 | |
| 416 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
| 417 | * the bitops (especially ~) can create illegal UTF-8. |
| 418 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
| 419 | |
| 420 | if (a < b) { |
| 421 | while (a < b) { |
| 422 | U8 c = UTF8SKIP(a); |
| 423 | |
| 424 | if (b - a < c) |
| 425 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
| 426 | a += c; |
| 427 | off--; |
| 428 | } |
| 429 | } |
| 430 | else { |
| 431 | while (b < a) { |
| 432 | U8 c = UTF8SKIP(b); |
| 433 | |
| 434 | if (a - b < c) |
| 435 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
| 436 | b += c; |
| 437 | off++; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | return off; |
| 442 | } |
| 443 | |
| 444 | /* |
| 445 | =for apidoc Am|U8*|utf8_hop|U8 *s|I32 off |
| 446 | |
| 447 | Return the UTF-8 pointer C<s> displaced by C<off> characters, either |
| 448 | forward or backward. |
| 449 | |
| 450 | WARNING: do not use the following unless you *know* C<off> is within |
| 451 | the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned |
| 452 | on the first byte of character or just after the last byte of a character. |
| 453 | |
| 454 | =cut */ |
| 455 | |
| 456 | U8 * |
| 457 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
| 458 | { |
| 459 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g |
| 460 | * the bitops (especially ~) can create illegal UTF-8. |
| 461 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
| 462 | |
| 463 | if (off >= 0) { |
| 464 | while (off--) |
| 465 | s += UTF8SKIP(s); |
| 466 | } |
| 467 | else { |
| 468 | while (off++) { |
| 469 | s--; |
| 470 | while (UTF8_IS_CONTINUATION(*s)) |
| 471 | s--; |
| 472 | } |
| 473 | } |
| 474 | return s; |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
| 479 | |
| 480 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
| 481 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
| 482 | updates len to contain the new length. |
| 483 | Returns zero on failure, setting C<len> to -1. |
| 484 | |
| 485 | =cut |
| 486 | */ |
| 487 | |
| 488 | U8 * |
| 489 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
| 490 | { |
| 491 | U8 *send; |
| 492 | U8 *d; |
| 493 | U8 *save = s; |
| 494 | |
| 495 | /* ensure valid UTF8 and chars < 256 before updating string */ |
| 496 | for (send = s + *len; s < send; ) { |
| 497 | U8 c = *s++; |
| 498 | |
| 499 | if (c >= 0x80 && |
| 500 | ((s >= send) || |
| 501 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { |
| 502 | *len = -1; |
| 503 | return 0; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | d = s = save; |
| 508 | while (s < send) { |
| 509 | STRLEN ulen; |
| 510 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
| 511 | s += ulen; |
| 512 | } |
| 513 | *d = '\0'; |
| 514 | *len = d - save; |
| 515 | return save; |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
| 520 | |
| 521 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
| 522 | Returns a pointer to the newly-created string, and sets C<len> to |
| 523 | reflect the new length. |
| 524 | |
| 525 | =cut |
| 526 | */ |
| 527 | |
| 528 | U8* |
| 529 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
| 530 | { |
| 531 | U8 *send; |
| 532 | U8 *d; |
| 533 | U8 *dst; |
| 534 | send = s + (*len); |
| 535 | |
| 536 | Newz(801, d, (*len) * 2 + 1, U8); |
| 537 | dst = d; |
| 538 | |
| 539 | while (s < send) { |
| 540 | if (*s < 0x80) |
| 541 | *d++ = *s++; |
| 542 | else { |
| 543 | UV uv = *s++; |
| 544 | *d++ = (( uv >> 6) | 0xc0); |
| 545 | *d++ = (( uv & 0x3f) | 0x80); |
| 546 | } |
| 547 | } |
| 548 | *d = '\0'; |
| 549 | *len = d-dst; |
| 550 | return dst; |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
| 555 | * |
| 556 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
| 557 | * We optimize for native, for obvious reasons. */ |
| 558 | |
| 559 | U8* |
| 560 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
| 561 | { |
| 562 | U8* pend; |
| 563 | U8* dstart = d; |
| 564 | |
| 565 | if (bytelen & 1) |
| 566 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
| 567 | |
| 568 | pend = p + bytelen; |
| 569 | |
| 570 | while (p < pend) { |
| 571 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
| 572 | p += 2; |
| 573 | if (uv < 0x80) { |
| 574 | *d++ = uv; |
| 575 | continue; |
| 576 | } |
| 577 | if (uv < 0x800) { |
| 578 | *d++ = (( uv >> 6) | 0xc0); |
| 579 | *d++ = (( uv & 0x3f) | 0x80); |
| 580 | continue; |
| 581 | } |
| 582 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
| 583 | UV low = *p++; |
| 584 | if (low < 0xdc00 || low >= 0xdfff) |
| 585 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
| 586 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
| 587 | } |
| 588 | if (uv < 0x10000) { |
| 589 | *d++ = (( uv >> 12) | 0xe0); |
| 590 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 591 | *d++ = (( uv & 0x3f) | 0x80); |
| 592 | continue; |
| 593 | } |
| 594 | else { |
| 595 | *d++ = (( uv >> 18) | 0xf0); |
| 596 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
| 597 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
| 598 | *d++ = (( uv & 0x3f) | 0x80); |
| 599 | continue; |
| 600 | } |
| 601 | } |
| 602 | *newlen = d - dstart; |
| 603 | return d; |
| 604 | } |
| 605 | |
| 606 | /* Note: this one is slightly destructive of the source. */ |
| 607 | |
| 608 | U8* |
| 609 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
| 610 | { |
| 611 | U8* s = (U8*)p; |
| 612 | U8* send = s + bytelen; |
| 613 | while (s < send) { |
| 614 | U8 tmp = s[0]; |
| 615 | s[0] = s[1]; |
| 616 | s[1] = tmp; |
| 617 | s += 2; |
| 618 | } |
| 619 | return utf16_to_utf8(p, d, bytelen, newlen); |
| 620 | } |
| 621 | |
| 622 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
| 623 | |
| 624 | bool |
| 625 | Perl_is_uni_alnum(pTHX_ U32 c) |
| 626 | { |
| 627 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 628 | uv_to_utf8(tmpbuf, (UV)c); |
| 629 | return is_utf8_alnum(tmpbuf); |
| 630 | } |
| 631 | |
| 632 | bool |
| 633 | Perl_is_uni_alnumc(pTHX_ U32 c) |
| 634 | { |
| 635 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 636 | uv_to_utf8(tmpbuf, (UV)c); |
| 637 | return is_utf8_alnumc(tmpbuf); |
| 638 | } |
| 639 | |
| 640 | bool |
| 641 | Perl_is_uni_idfirst(pTHX_ U32 c) |
| 642 | { |
| 643 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 644 | uv_to_utf8(tmpbuf, (UV)c); |
| 645 | return is_utf8_idfirst(tmpbuf); |
| 646 | } |
| 647 | |
| 648 | bool |
| 649 | Perl_is_uni_alpha(pTHX_ U32 c) |
| 650 | { |
| 651 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 652 | uv_to_utf8(tmpbuf, (UV)c); |
| 653 | return is_utf8_alpha(tmpbuf); |
| 654 | } |
| 655 | |
| 656 | bool |
| 657 | Perl_is_uni_ascii(pTHX_ U32 c) |
| 658 | { |
| 659 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 660 | uv_to_utf8(tmpbuf, (UV)c); |
| 661 | return is_utf8_ascii(tmpbuf); |
| 662 | } |
| 663 | |
| 664 | bool |
| 665 | Perl_is_uni_space(pTHX_ U32 c) |
| 666 | { |
| 667 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 668 | uv_to_utf8(tmpbuf, (UV)c); |
| 669 | return is_utf8_space(tmpbuf); |
| 670 | } |
| 671 | |
| 672 | bool |
| 673 | Perl_is_uni_digit(pTHX_ U32 c) |
| 674 | { |
| 675 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 676 | uv_to_utf8(tmpbuf, (UV)c); |
| 677 | return is_utf8_digit(tmpbuf); |
| 678 | } |
| 679 | |
| 680 | bool |
| 681 | Perl_is_uni_upper(pTHX_ U32 c) |
| 682 | { |
| 683 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 684 | uv_to_utf8(tmpbuf, (UV)c); |
| 685 | return is_utf8_upper(tmpbuf); |
| 686 | } |
| 687 | |
| 688 | bool |
| 689 | Perl_is_uni_lower(pTHX_ U32 c) |
| 690 | { |
| 691 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 692 | uv_to_utf8(tmpbuf, (UV)c); |
| 693 | return is_utf8_lower(tmpbuf); |
| 694 | } |
| 695 | |
| 696 | bool |
| 697 | Perl_is_uni_cntrl(pTHX_ U32 c) |
| 698 | { |
| 699 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 700 | uv_to_utf8(tmpbuf, (UV)c); |
| 701 | return is_utf8_cntrl(tmpbuf); |
| 702 | } |
| 703 | |
| 704 | bool |
| 705 | Perl_is_uni_graph(pTHX_ U32 c) |
| 706 | { |
| 707 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 708 | uv_to_utf8(tmpbuf, (UV)c); |
| 709 | return is_utf8_graph(tmpbuf); |
| 710 | } |
| 711 | |
| 712 | bool |
| 713 | Perl_is_uni_print(pTHX_ U32 c) |
| 714 | { |
| 715 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 716 | uv_to_utf8(tmpbuf, (UV)c); |
| 717 | return is_utf8_print(tmpbuf); |
| 718 | } |
| 719 | |
| 720 | bool |
| 721 | Perl_is_uni_punct(pTHX_ U32 c) |
| 722 | { |
| 723 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 724 | uv_to_utf8(tmpbuf, (UV)c); |
| 725 | return is_utf8_punct(tmpbuf); |
| 726 | } |
| 727 | |
| 728 | bool |
| 729 | Perl_is_uni_xdigit(pTHX_ U32 c) |
| 730 | { |
| 731 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 732 | uv_to_utf8(tmpbuf, (UV)c); |
| 733 | return is_utf8_xdigit(tmpbuf); |
| 734 | } |
| 735 | |
| 736 | U32 |
| 737 | Perl_to_uni_upper(pTHX_ U32 c) |
| 738 | { |
| 739 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 740 | uv_to_utf8(tmpbuf, (UV)c); |
| 741 | return to_utf8_upper(tmpbuf); |
| 742 | } |
| 743 | |
| 744 | U32 |
| 745 | Perl_to_uni_title(pTHX_ U32 c) |
| 746 | { |
| 747 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 748 | uv_to_utf8(tmpbuf, (UV)c); |
| 749 | return to_utf8_title(tmpbuf); |
| 750 | } |
| 751 | |
| 752 | U32 |
| 753 | Perl_to_uni_lower(pTHX_ U32 c) |
| 754 | { |
| 755 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 756 | uv_to_utf8(tmpbuf, (UV)c); |
| 757 | return to_utf8_lower(tmpbuf); |
| 758 | } |
| 759 | |
| 760 | /* for now these all assume no locale info available for Unicode > 255 */ |
| 761 | |
| 762 | bool |
| 763 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
| 764 | { |
| 765 | return is_uni_alnum(c); /* XXX no locale support yet */ |
| 766 | } |
| 767 | |
| 768 | bool |
| 769 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
| 770 | { |
| 771 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
| 772 | } |
| 773 | |
| 774 | bool |
| 775 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
| 776 | { |
| 777 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
| 778 | } |
| 779 | |
| 780 | bool |
| 781 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
| 782 | { |
| 783 | return is_uni_alpha(c); /* XXX no locale support yet */ |
| 784 | } |
| 785 | |
| 786 | bool |
| 787 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
| 788 | { |
| 789 | return is_uni_ascii(c); /* XXX no locale support yet */ |
| 790 | } |
| 791 | |
| 792 | bool |
| 793 | Perl_is_uni_space_lc(pTHX_ U32 c) |
| 794 | { |
| 795 | return is_uni_space(c); /* XXX no locale support yet */ |
| 796 | } |
| 797 | |
| 798 | bool |
| 799 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
| 800 | { |
| 801 | return is_uni_digit(c); /* XXX no locale support yet */ |
| 802 | } |
| 803 | |
| 804 | bool |
| 805 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
| 806 | { |
| 807 | return is_uni_upper(c); /* XXX no locale support yet */ |
| 808 | } |
| 809 | |
| 810 | bool |
| 811 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
| 812 | { |
| 813 | return is_uni_lower(c); /* XXX no locale support yet */ |
| 814 | } |
| 815 | |
| 816 | bool |
| 817 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
| 818 | { |
| 819 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
| 820 | } |
| 821 | |
| 822 | bool |
| 823 | Perl_is_uni_graph_lc(pTHX_ U32 c) |
| 824 | { |
| 825 | return is_uni_graph(c); /* XXX no locale support yet */ |
| 826 | } |
| 827 | |
| 828 | bool |
| 829 | Perl_is_uni_print_lc(pTHX_ U32 c) |
| 830 | { |
| 831 | return is_uni_print(c); /* XXX no locale support yet */ |
| 832 | } |
| 833 | |
| 834 | bool |
| 835 | Perl_is_uni_punct_lc(pTHX_ U32 c) |
| 836 | { |
| 837 | return is_uni_punct(c); /* XXX no locale support yet */ |
| 838 | } |
| 839 | |
| 840 | bool |
| 841 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) |
| 842 | { |
| 843 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
| 844 | } |
| 845 | |
| 846 | U32 |
| 847 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
| 848 | { |
| 849 | return to_uni_upper(c); /* XXX no locale support yet */ |
| 850 | } |
| 851 | |
| 852 | U32 |
| 853 | Perl_to_uni_title_lc(pTHX_ U32 c) |
| 854 | { |
| 855 | return to_uni_title(c); /* XXX no locale support yet */ |
| 856 | } |
| 857 | |
| 858 | U32 |
| 859 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
| 860 | { |
| 861 | return to_uni_lower(c); /* XXX no locale support yet */ |
| 862 | } |
| 863 | |
| 864 | bool |
| 865 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
| 866 | { |
| 867 | if (!is_utf8_char(p)) |
| 868 | return FALSE; |
| 869 | if (!PL_utf8_alnum) |
| 870 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
| 871 | * descendant of isalnum(3), in other words, it doesn't |
| 872 | * contain the '_'. --jhi */ |
| 873 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
| 874 | return swash_fetch(PL_utf8_alnum, p); |
| 875 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ |
| 876 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
| 877 | if (!PL_utf8_alnum) |
| 878 | PL_utf8_alnum = swash_init("utf8", "", |
| 879 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
| 880 | return swash_fetch(PL_utf8_alnum, p); |
| 881 | #endif |
| 882 | } |
| 883 | |
| 884 | bool |
| 885 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
| 886 | { |
| 887 | if (!is_utf8_char(p)) |
| 888 | return FALSE; |
| 889 | if (!PL_utf8_alnum) |
| 890 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
| 891 | return swash_fetch(PL_utf8_alnum, p); |
| 892 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
| 893 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
| 894 | if (!PL_utf8_alnum) |
| 895 | PL_utf8_alnum = swash_init("utf8", "", |
| 896 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
| 897 | return swash_fetch(PL_utf8_alnum, p); |
| 898 | #endif |
| 899 | } |
| 900 | |
| 901 | bool |
| 902 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
| 903 | { |
| 904 | return *p == '_' || is_utf8_alpha(p); |
| 905 | } |
| 906 | |
| 907 | bool |
| 908 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
| 909 | { |
| 910 | if (!is_utf8_char(p)) |
| 911 | return FALSE; |
| 912 | if (!PL_utf8_alpha) |
| 913 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
| 914 | return swash_fetch(PL_utf8_alpha, p); |
| 915 | } |
| 916 | |
| 917 | bool |
| 918 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
| 919 | { |
| 920 | if (!is_utf8_char(p)) |
| 921 | return FALSE; |
| 922 | if (!PL_utf8_ascii) |
| 923 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
| 924 | return swash_fetch(PL_utf8_ascii, p); |
| 925 | } |
| 926 | |
| 927 | bool |
| 928 | Perl_is_utf8_space(pTHX_ U8 *p) |
| 929 | { |
| 930 | if (!is_utf8_char(p)) |
| 931 | return FALSE; |
| 932 | if (!PL_utf8_space) |
| 933 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
| 934 | return swash_fetch(PL_utf8_space, p); |
| 935 | } |
| 936 | |
| 937 | bool |
| 938 | Perl_is_utf8_digit(pTHX_ U8 *p) |
| 939 | { |
| 940 | if (!is_utf8_char(p)) |
| 941 | return FALSE; |
| 942 | if (!PL_utf8_digit) |
| 943 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
| 944 | return swash_fetch(PL_utf8_digit, p); |
| 945 | } |
| 946 | |
| 947 | bool |
| 948 | Perl_is_utf8_upper(pTHX_ U8 *p) |
| 949 | { |
| 950 | if (!is_utf8_char(p)) |
| 951 | return FALSE; |
| 952 | if (!PL_utf8_upper) |
| 953 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
| 954 | return swash_fetch(PL_utf8_upper, p); |
| 955 | } |
| 956 | |
| 957 | bool |
| 958 | Perl_is_utf8_lower(pTHX_ U8 *p) |
| 959 | { |
| 960 | if (!is_utf8_char(p)) |
| 961 | return FALSE; |
| 962 | if (!PL_utf8_lower) |
| 963 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
| 964 | return swash_fetch(PL_utf8_lower, p); |
| 965 | } |
| 966 | |
| 967 | bool |
| 968 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
| 969 | { |
| 970 | if (!is_utf8_char(p)) |
| 971 | return FALSE; |
| 972 | if (!PL_utf8_cntrl) |
| 973 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
| 974 | return swash_fetch(PL_utf8_cntrl, p); |
| 975 | } |
| 976 | |
| 977 | bool |
| 978 | Perl_is_utf8_graph(pTHX_ U8 *p) |
| 979 | { |
| 980 | if (!is_utf8_char(p)) |
| 981 | return FALSE; |
| 982 | if (!PL_utf8_graph) |
| 983 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
| 984 | return swash_fetch(PL_utf8_graph, p); |
| 985 | } |
| 986 | |
| 987 | bool |
| 988 | Perl_is_utf8_print(pTHX_ U8 *p) |
| 989 | { |
| 990 | if (!is_utf8_char(p)) |
| 991 | return FALSE; |
| 992 | if (!PL_utf8_print) |
| 993 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
| 994 | return swash_fetch(PL_utf8_print, p); |
| 995 | } |
| 996 | |
| 997 | bool |
| 998 | Perl_is_utf8_punct(pTHX_ U8 *p) |
| 999 | { |
| 1000 | if (!is_utf8_char(p)) |
| 1001 | return FALSE; |
| 1002 | if (!PL_utf8_punct) |
| 1003 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
| 1004 | return swash_fetch(PL_utf8_punct, p); |
| 1005 | } |
| 1006 | |
| 1007 | bool |
| 1008 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
| 1009 | { |
| 1010 | if (!is_utf8_char(p)) |
| 1011 | return FALSE; |
| 1012 | if (!PL_utf8_xdigit) |
| 1013 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
| 1014 | return swash_fetch(PL_utf8_xdigit, p); |
| 1015 | } |
| 1016 | |
| 1017 | bool |
| 1018 | Perl_is_utf8_mark(pTHX_ U8 *p) |
| 1019 | { |
| 1020 | if (!is_utf8_char(p)) |
| 1021 | return FALSE; |
| 1022 | if (!PL_utf8_mark) |
| 1023 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
| 1024 | return swash_fetch(PL_utf8_mark, p); |
| 1025 | } |
| 1026 | |
| 1027 | UV |
| 1028 | Perl_to_utf8_upper(pTHX_ U8 *p) |
| 1029 | { |
| 1030 | UV uv; |
| 1031 | |
| 1032 | if (!PL_utf8_toupper) |
| 1033 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
| 1034 | uv = swash_fetch(PL_utf8_toupper, p); |
| 1035 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
| 1036 | } |
| 1037 | |
| 1038 | UV |
| 1039 | Perl_to_utf8_title(pTHX_ U8 *p) |
| 1040 | { |
| 1041 | UV uv; |
| 1042 | |
| 1043 | if (!PL_utf8_totitle) |
| 1044 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
| 1045 | uv = swash_fetch(PL_utf8_totitle, p); |
| 1046 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
| 1047 | } |
| 1048 | |
| 1049 | UV |
| 1050 | Perl_to_utf8_lower(pTHX_ U8 *p) |
| 1051 | { |
| 1052 | UV uv; |
| 1053 | |
| 1054 | if (!PL_utf8_tolower) |
| 1055 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
| 1056 | uv = swash_fetch(PL_utf8_tolower, p); |
| 1057 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
| 1058 | } |
| 1059 | |
| 1060 | /* a "swash" is a swatch hash */ |
| 1061 | |
| 1062 | SV* |
| 1063 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
| 1064 | { |
| 1065 | SV* retval; |
| 1066 | char tmpbuf[256]; |
| 1067 | dSP; |
| 1068 | |
| 1069 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ |
| 1070 | ENTER; |
| 1071 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
| 1072 | LEAVE; |
| 1073 | } |
| 1074 | SPAGAIN; |
| 1075 | PUSHSTACKi(PERLSI_MAGIC); |
| 1076 | PUSHMARK(SP); |
| 1077 | EXTEND(SP,5); |
| 1078 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
| 1079 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
| 1080 | PUSHs(listsv); |
| 1081 | PUSHs(sv_2mortal(newSViv(minbits))); |
| 1082 | PUSHs(sv_2mortal(newSViv(none))); |
| 1083 | PUTBACK; |
| 1084 | ENTER; |
| 1085 | SAVEI32(PL_hints); |
| 1086 | PL_hints = 0; |
| 1087 | save_re_context(); |
| 1088 | if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */ |
| 1089 | strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf); |
| 1090 | if (call_method("SWASHNEW", G_SCALAR)) |
| 1091 | retval = newSVsv(*PL_stack_sp--); |
| 1092 | else |
| 1093 | retval = &PL_sv_undef; |
| 1094 | LEAVE; |
| 1095 | POPSTACK; |
| 1096 | if (PL_curcop == &PL_compiling) { |
| 1097 | strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf); |
| 1098 | PL_curcop->op_private = PL_hints; |
| 1099 | } |
| 1100 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) |
| 1101 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
| 1102 | return retval; |
| 1103 | } |
| 1104 | |
| 1105 | UV |
| 1106 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
| 1107 | { |
| 1108 | HV* hv = (HV*)SvRV(sv); |
| 1109 | U32 klen = UTF8SKIP(ptr) - 1; |
| 1110 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ |
| 1111 | STRLEN slen; |
| 1112 | STRLEN needents = (klen ? 64 : 128); |
| 1113 | U8 *tmps; |
| 1114 | U32 bit; |
| 1115 | SV *retval; |
| 1116 | |
| 1117 | /* |
| 1118 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
| 1119 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
| 1120 | * it's nothing to sniff at.) Pity we usually come through at least |
| 1121 | * two function calls to get here... |
| 1122 | * |
| 1123 | * NB: this code assumes that swatches are never modified, once generated! |
| 1124 | */ |
| 1125 | |
| 1126 | if (hv == PL_last_swash_hv && |
| 1127 | klen == PL_last_swash_klen && |
| 1128 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
| 1129 | { |
| 1130 | tmps = PL_last_swash_tmps; |
| 1131 | slen = PL_last_swash_slen; |
| 1132 | } |
| 1133 | else { |
| 1134 | /* Try our second-level swatch cache, kept in a hash. */ |
| 1135 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
| 1136 | |
| 1137 | /* If not cached, generate it via utf8::SWASHGET */ |
| 1138 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
| 1139 | dSP; |
| 1140 | ENTER; |
| 1141 | SAVETMPS; |
| 1142 | save_re_context(); |
| 1143 | PUSHSTACKi(PERLSI_MAGIC); |
| 1144 | PUSHMARK(SP); |
| 1145 | EXTEND(SP,3); |
| 1146 | PUSHs((SV*)sv); |
| 1147 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1)))); |
| 1148 | PUSHs(sv_2mortal(newSViv(needents))); |
| 1149 | PUTBACK; |
| 1150 | if (call_method("SWASHGET", G_SCALAR)) |
| 1151 | retval = newSVsv(*PL_stack_sp--); |
| 1152 | else |
| 1153 | retval = &PL_sv_undef; |
| 1154 | POPSTACK; |
| 1155 | FREETMPS; |
| 1156 | LEAVE; |
| 1157 | if (PL_curcop == &PL_compiling) |
| 1158 | PL_curcop->op_private = PL_hints; |
| 1159 | |
| 1160 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
| 1161 | |
| 1162 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
| 1163 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
| 1164 | } |
| 1165 | |
| 1166 | PL_last_swash_hv = hv; |
| 1167 | PL_last_swash_klen = klen; |
| 1168 | PL_last_swash_tmps = tmps; |
| 1169 | PL_last_swash_slen = slen; |
| 1170 | if (klen) |
| 1171 | Copy(ptr, PL_last_swash_key, klen, U8); |
| 1172 | } |
| 1173 | |
| 1174 | switch ((int)((slen << 3) / needents)) { |
| 1175 | case 1: |
| 1176 | bit = 1 << (off & 7); |
| 1177 | off >>= 3; |
| 1178 | return (tmps[off] & bit) != 0; |
| 1179 | case 8: |
| 1180 | return tmps[off]; |
| 1181 | case 16: |
| 1182 | off <<= 1; |
| 1183 | return (tmps[off] << 8) + tmps[off + 1] ; |
| 1184 | case 32: |
| 1185 | off <<= 2; |
| 1186 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
| 1187 | } |
| 1188 | Perl_croak(aTHX_ "panic: swash_fetch"); |
| 1189 | return 0; |
| 1190 | } |