| 1 | /* Elementary Unicode string functions. |
| 2 | Copyright (C) 2001-2002, 2005-2013 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software: you can redistribute it and/or modify it |
| 5 | under the terms of the GNU Lesser General Public License as published |
| 6 | by the Free Software Foundation; either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but 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 License |
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 16 | |
| 17 | #ifndef _UNISTR_H |
| 18 | #define _UNISTR_H |
| 19 | |
| 20 | #include "unitypes.h" |
| 21 | |
| 22 | /* Get common macros for C. */ |
| 23 | #include "unused-parameter.h" |
| 24 | |
| 25 | /* Get bool. */ |
| 26 | #include <stdbool.h> |
| 27 | |
| 28 | /* Get size_t. */ |
| 29 | #include <stddef.h> |
| 30 | |
| 31 | #ifdef __cplusplus |
| 32 | extern "C" { |
| 33 | #endif |
| 34 | |
| 35 | |
| 36 | /* Conventions: |
| 37 | |
| 38 | All functions prefixed with u8_ operate on UTF-8 encoded strings. |
| 39 | Their unit is an uint8_t (1 byte). |
| 40 | |
| 41 | All functions prefixed with u16_ operate on UTF-16 encoded strings. |
| 42 | Their unit is an uint16_t (a 2-byte word). |
| 43 | |
| 44 | All functions prefixed with u32_ operate on UCS-4 encoded strings. |
| 45 | Their unit is an uint32_t (a 4-byte word). |
| 46 | |
| 47 | All argument pairs (s, n) denote a Unicode string s[0..n-1] with exactly |
| 48 | n units. |
| 49 | |
| 50 | All arguments starting with "str" and the arguments of functions starting |
| 51 | with u8_str/u16_str/u32_str denote a NUL terminated string, i.e. a string |
| 52 | which terminates at the first NUL unit. This termination unit is |
| 53 | considered part of the string for all memory allocation purposes, but |
| 54 | is not considered part of the string for all other logical purposes. |
| 55 | |
| 56 | Functions returning a string result take a (resultbuf, lengthp) argument |
| 57 | pair. If resultbuf is not NULL and the result fits into *lengthp units, |
| 58 | it is put in resultbuf, and resultbuf is returned. Otherwise, a freshly |
| 59 | allocated string is returned. In both cases, *lengthp is set to the |
| 60 | length (number of units) of the returned string. In case of error, |
| 61 | NULL is returned and errno is set. */ |
| 62 | |
| 63 | |
| 64 | /* Elementary string checks. */ |
| 65 | |
| 66 | /* Check whether an UTF-8 string is well-formed. |
| 67 | Return NULL if valid, or a pointer to the first invalid unit otherwise. */ |
| 68 | extern const uint8_t * |
| 69 | u8_check (const uint8_t *s, size_t n) |
| 70 | _UC_ATTRIBUTE_PURE; |
| 71 | |
| 72 | /* Check whether an UTF-16 string is well-formed. |
| 73 | Return NULL if valid, or a pointer to the first invalid unit otherwise. */ |
| 74 | extern const uint16_t * |
| 75 | u16_check (const uint16_t *s, size_t n) |
| 76 | _UC_ATTRIBUTE_PURE; |
| 77 | |
| 78 | /* Check whether an UCS-4 string is well-formed. |
| 79 | Return NULL if valid, or a pointer to the first invalid unit otherwise. */ |
| 80 | extern const uint32_t * |
| 81 | u32_check (const uint32_t *s, size_t n) |
| 82 | _UC_ATTRIBUTE_PURE; |
| 83 | |
| 84 | |
| 85 | /* Elementary string conversions. */ |
| 86 | |
| 87 | /* Convert an UTF-8 string to an UTF-16 string. */ |
| 88 | extern uint16_t * |
| 89 | u8_to_u16 (const uint8_t *s, size_t n, uint16_t *resultbuf, |
| 90 | size_t *lengthp); |
| 91 | |
| 92 | /* Convert an UTF-8 string to an UCS-4 string. */ |
| 93 | extern uint32_t * |
| 94 | u8_to_u32 (const uint8_t *s, size_t n, uint32_t *resultbuf, |
| 95 | size_t *lengthp); |
| 96 | |
| 97 | /* Convert an UTF-16 string to an UTF-8 string. */ |
| 98 | extern uint8_t * |
| 99 | u16_to_u8 (const uint16_t *s, size_t n, uint8_t *resultbuf, |
| 100 | size_t *lengthp); |
| 101 | |
| 102 | /* Convert an UTF-16 string to an UCS-4 string. */ |
| 103 | extern uint32_t * |
| 104 | u16_to_u32 (const uint16_t *s, size_t n, uint32_t *resultbuf, |
| 105 | size_t *lengthp); |
| 106 | |
| 107 | /* Convert an UCS-4 string to an UTF-8 string. */ |
| 108 | extern uint8_t * |
| 109 | u32_to_u8 (const uint32_t *s, size_t n, uint8_t *resultbuf, |
| 110 | size_t *lengthp); |
| 111 | |
| 112 | /* Convert an UCS-4 string to an UTF-16 string. */ |
| 113 | extern uint16_t * |
| 114 | u32_to_u16 (const uint32_t *s, size_t n, uint16_t *resultbuf, |
| 115 | size_t *lengthp); |
| 116 | |
| 117 | |
| 118 | /* Elementary string functions. */ |
| 119 | |
| 120 | /* Return the length (number of units) of the first character in S, which is |
| 121 | no longer than N. Return 0 if it is the NUL character. Return -1 upon |
| 122 | failure. */ |
| 123 | /* Similar to mblen(), except that s must not be NULL. */ |
| 124 | extern int |
| 125 | u8_mblen (const uint8_t *s, size_t n) |
| 126 | _UC_ATTRIBUTE_PURE; |
| 127 | extern int |
| 128 | u16_mblen (const uint16_t *s, size_t n) |
| 129 | _UC_ATTRIBUTE_PURE; |
| 130 | extern int |
| 131 | u32_mblen (const uint32_t *s, size_t n) |
| 132 | _UC_ATTRIBUTE_PURE; |
| 133 | |
| 134 | /* Return the length (number of units) of the first character in S, putting |
| 135 | its 'ucs4_t' representation in *PUC. Upon failure, *PUC is set to 0xfffd, |
| 136 | and an appropriate number of units is returned. |
| 137 | The number of available units, N, must be > 0. */ |
| 138 | /* Similar to mbtowc(), except that puc and s must not be NULL, n must be > 0, |
| 139 | and the NUL character is not treated specially. */ |
| 140 | /* The variants with _safe suffix are safe, even if the library is compiled |
| 141 | without --enable-safety. */ |
| 142 | |
| 143 | #if GNULIB_UNISTR_U8_MBTOUC_UNSAFE || HAVE_LIBUNISTRING |
| 144 | # if !HAVE_INLINE |
| 145 | extern int |
| 146 | u8_mbtouc_unsafe (ucs4_t *puc, const uint8_t *s, size_t n); |
| 147 | # else |
| 148 | extern int |
| 149 | u8_mbtouc_unsafe_aux (ucs4_t *puc, const uint8_t *s, size_t n); |
| 150 | static inline int |
| 151 | u8_mbtouc_unsafe (ucs4_t *puc, const uint8_t *s, size_t n) |
| 152 | { |
| 153 | uint8_t c = *s; |
| 154 | |
| 155 | if (c < 0x80) |
| 156 | { |
| 157 | *puc = c; |
| 158 | return 1; |
| 159 | } |
| 160 | else |
| 161 | return u8_mbtouc_unsafe_aux (puc, s, n); |
| 162 | } |
| 163 | # endif |
| 164 | #endif |
| 165 | |
| 166 | #if GNULIB_UNISTR_U16_MBTOUC_UNSAFE || HAVE_LIBUNISTRING |
| 167 | # if !HAVE_INLINE |
| 168 | extern int |
| 169 | u16_mbtouc_unsafe (ucs4_t *puc, const uint16_t *s, size_t n); |
| 170 | # else |
| 171 | extern int |
| 172 | u16_mbtouc_unsafe_aux (ucs4_t *puc, const uint16_t *s, size_t n); |
| 173 | static inline int |
| 174 | u16_mbtouc_unsafe (ucs4_t *puc, const uint16_t *s, size_t n) |
| 175 | { |
| 176 | uint16_t c = *s; |
| 177 | |
| 178 | if (c < 0xd800 || c >= 0xe000) |
| 179 | { |
| 180 | *puc = c; |
| 181 | return 1; |
| 182 | } |
| 183 | else |
| 184 | return u16_mbtouc_unsafe_aux (puc, s, n); |
| 185 | } |
| 186 | # endif |
| 187 | #endif |
| 188 | |
| 189 | #if GNULIB_UNISTR_U32_MBTOUC_UNSAFE || HAVE_LIBUNISTRING |
| 190 | # if !HAVE_INLINE |
| 191 | extern int |
| 192 | u32_mbtouc_unsafe (ucs4_t *puc, const uint32_t *s, size_t n); |
| 193 | # else |
| 194 | static inline int |
| 195 | u32_mbtouc_unsafe (ucs4_t *puc, |
| 196 | const uint32_t *s, size_t n _GL_UNUSED_PARAMETER) |
| 197 | { |
| 198 | uint32_t c = *s; |
| 199 | |
| 200 | # if CONFIG_UNICODE_SAFETY |
| 201 | if (c < 0xd800 || (c >= 0xe000 && c < 0x110000)) |
| 202 | # endif |
| 203 | *puc = c; |
| 204 | # if CONFIG_UNICODE_SAFETY |
| 205 | else |
| 206 | /* invalid multibyte character */ |
| 207 | *puc = 0xfffd; |
| 208 | # endif |
| 209 | return 1; |
| 210 | } |
| 211 | # endif |
| 212 | #endif |
| 213 | |
| 214 | #if GNULIB_UNISTR_U8_MBTOUC || HAVE_LIBUNISTRING |
| 215 | # if !HAVE_INLINE |
| 216 | extern int |
| 217 | u8_mbtouc (ucs4_t *puc, const uint8_t *s, size_t n); |
| 218 | # else |
| 219 | extern int |
| 220 | u8_mbtouc_aux (ucs4_t *puc, const uint8_t *s, size_t n); |
| 221 | static inline int |
| 222 | u8_mbtouc (ucs4_t *puc, const uint8_t *s, size_t n) |
| 223 | { |
| 224 | uint8_t c = *s; |
| 225 | |
| 226 | if (c < 0x80) |
| 227 | { |
| 228 | *puc = c; |
| 229 | return 1; |
| 230 | } |
| 231 | else |
| 232 | return u8_mbtouc_aux (puc, s, n); |
| 233 | } |
| 234 | # endif |
| 235 | #endif |
| 236 | |
| 237 | #if GNULIB_UNISTR_U16_MBTOUC || HAVE_LIBUNISTRING |
| 238 | # if !HAVE_INLINE |
| 239 | extern int |
| 240 | u16_mbtouc (ucs4_t *puc, const uint16_t *s, size_t n); |
| 241 | # else |
| 242 | extern int |
| 243 | u16_mbtouc_aux (ucs4_t *puc, const uint16_t *s, size_t n); |
| 244 | static inline int |
| 245 | u16_mbtouc (ucs4_t *puc, const uint16_t *s, size_t n) |
| 246 | { |
| 247 | uint16_t c = *s; |
| 248 | |
| 249 | if (c < 0xd800 || c >= 0xe000) |
| 250 | { |
| 251 | *puc = c; |
| 252 | return 1; |
| 253 | } |
| 254 | else |
| 255 | return u16_mbtouc_aux (puc, s, n); |
| 256 | } |
| 257 | # endif |
| 258 | #endif |
| 259 | |
| 260 | #if GNULIB_UNISTR_U32_MBTOUC || HAVE_LIBUNISTRING |
| 261 | # if !HAVE_INLINE |
| 262 | extern int |
| 263 | u32_mbtouc (ucs4_t *puc, const uint32_t *s, size_t n); |
| 264 | # else |
| 265 | static inline int |
| 266 | u32_mbtouc (ucs4_t *puc, const uint32_t *s, size_t n _GL_UNUSED_PARAMETER) |
| 267 | { |
| 268 | uint32_t c = *s; |
| 269 | |
| 270 | if (c < 0xd800 || (c >= 0xe000 && c < 0x110000)) |
| 271 | *puc = c; |
| 272 | else |
| 273 | /* invalid multibyte character */ |
| 274 | *puc = 0xfffd; |
| 275 | return 1; |
| 276 | } |
| 277 | # endif |
| 278 | #endif |
| 279 | |
| 280 | /* Return the length (number of units) of the first character in S, putting |
| 281 | its 'ucs4_t' representation in *PUC. Upon failure, *PUC is set to 0xfffd, |
| 282 | and -1 is returned for an invalid sequence of units, -2 is returned for an |
| 283 | incomplete sequence of units. |
| 284 | The number of available units, N, must be > 0. */ |
| 285 | /* Similar to u*_mbtouc(), except that the return value gives more details |
| 286 | about the failure, similar to mbrtowc(). */ |
| 287 | |
| 288 | #if GNULIB_UNISTR_U8_MBTOUCR || HAVE_LIBUNISTRING |
| 289 | extern int |
| 290 | u8_mbtoucr (ucs4_t *puc, const uint8_t *s, size_t n); |
| 291 | #endif |
| 292 | |
| 293 | #if GNULIB_UNISTR_U16_MBTOUCR || HAVE_LIBUNISTRING |
| 294 | extern int |
| 295 | u16_mbtoucr (ucs4_t *puc, const uint16_t *s, size_t n); |
| 296 | #endif |
| 297 | |
| 298 | #if GNULIB_UNISTR_U32_MBTOUCR || HAVE_LIBUNISTRING |
| 299 | extern int |
| 300 | u32_mbtoucr (ucs4_t *puc, const uint32_t *s, size_t n); |
| 301 | #endif |
| 302 | |
| 303 | /* Put the multibyte character represented by UC in S, returning its |
| 304 | length. Return -1 upon failure, -2 if the number of available units, N, |
| 305 | is too small. The latter case cannot occur if N >= 6/2/1, respectively. */ |
| 306 | /* Similar to wctomb(), except that s must not be NULL, and the argument n |
| 307 | must be specified. */ |
| 308 | |
| 309 | #if GNULIB_UNISTR_U8_UCTOMB || HAVE_LIBUNISTRING |
| 310 | /* Auxiliary function, also used by u8_chr, u8_strchr, u8_strrchr. */ |
| 311 | extern int |
| 312 | u8_uctomb_aux (uint8_t *s, ucs4_t uc, int n); |
| 313 | # if !HAVE_INLINE |
| 314 | extern int |
| 315 | u8_uctomb (uint8_t *s, ucs4_t uc, int n); |
| 316 | # else |
| 317 | static inline int |
| 318 | u8_uctomb (uint8_t *s, ucs4_t uc, int n) |
| 319 | { |
| 320 | if (uc < 0x80 && n > 0) |
| 321 | { |
| 322 | s[0] = uc; |
| 323 | return 1; |
| 324 | } |
| 325 | else |
| 326 | return u8_uctomb_aux (s, uc, n); |
| 327 | } |
| 328 | # endif |
| 329 | #endif |
| 330 | |
| 331 | #if GNULIB_UNISTR_U16_UCTOMB || HAVE_LIBUNISTRING |
| 332 | /* Auxiliary function, also used by u16_chr, u16_strchr, u16_strrchr. */ |
| 333 | extern int |
| 334 | u16_uctomb_aux (uint16_t *s, ucs4_t uc, int n); |
| 335 | # if !HAVE_INLINE |
| 336 | extern int |
| 337 | u16_uctomb (uint16_t *s, ucs4_t uc, int n); |
| 338 | # else |
| 339 | static inline int |
| 340 | u16_uctomb (uint16_t *s, ucs4_t uc, int n) |
| 341 | { |
| 342 | if (uc < 0xd800 && n > 0) |
| 343 | { |
| 344 | s[0] = uc; |
| 345 | return 1; |
| 346 | } |
| 347 | else |
| 348 | return u16_uctomb_aux (s, uc, n); |
| 349 | } |
| 350 | # endif |
| 351 | #endif |
| 352 | |
| 353 | #if GNULIB_UNISTR_U32_UCTOMB || HAVE_LIBUNISTRING |
| 354 | # if !HAVE_INLINE |
| 355 | extern int |
| 356 | u32_uctomb (uint32_t *s, ucs4_t uc, int n); |
| 357 | # else |
| 358 | static inline int |
| 359 | u32_uctomb (uint32_t *s, ucs4_t uc, int n) |
| 360 | { |
| 361 | if (uc < 0xd800 || (uc >= 0xe000 && uc < 0x110000)) |
| 362 | { |
| 363 | if (n > 0) |
| 364 | { |
| 365 | *s = uc; |
| 366 | return 1; |
| 367 | } |
| 368 | else |
| 369 | return -2; |
| 370 | } |
| 371 | else |
| 372 | return -1; |
| 373 | } |
| 374 | # endif |
| 375 | #endif |
| 376 | |
| 377 | /* Copy N units from SRC to DEST. */ |
| 378 | /* Similar to memcpy(). */ |
| 379 | extern uint8_t * |
| 380 | u8_cpy (uint8_t *dest, const uint8_t *src, size_t n); |
| 381 | extern uint16_t * |
| 382 | u16_cpy (uint16_t *dest, const uint16_t *src, size_t n); |
| 383 | extern uint32_t * |
| 384 | u32_cpy (uint32_t *dest, const uint32_t *src, size_t n); |
| 385 | |
| 386 | /* Copy N units from SRC to DEST, guaranteeing correct behavior for |
| 387 | overlapping memory areas. */ |
| 388 | /* Similar to memmove(). */ |
| 389 | extern uint8_t * |
| 390 | u8_move (uint8_t *dest, const uint8_t *src, size_t n); |
| 391 | extern uint16_t * |
| 392 | u16_move (uint16_t *dest, const uint16_t *src, size_t n); |
| 393 | extern uint32_t * |
| 394 | u32_move (uint32_t *dest, const uint32_t *src, size_t n); |
| 395 | |
| 396 | /* Set the first N characters of S to UC. UC should be a character that |
| 397 | occupies only 1 unit. */ |
| 398 | /* Similar to memset(). */ |
| 399 | extern uint8_t * |
| 400 | u8_set (uint8_t *s, ucs4_t uc, size_t n); |
| 401 | extern uint16_t * |
| 402 | u16_set (uint16_t *s, ucs4_t uc, size_t n); |
| 403 | extern uint32_t * |
| 404 | u32_set (uint32_t *s, ucs4_t uc, size_t n); |
| 405 | |
| 406 | /* Compare S1 and S2, each of length N. */ |
| 407 | /* Similar to memcmp(). */ |
| 408 | extern int |
| 409 | u8_cmp (const uint8_t *s1, const uint8_t *s2, size_t n) |
| 410 | _UC_ATTRIBUTE_PURE; |
| 411 | extern int |
| 412 | u16_cmp (const uint16_t *s1, const uint16_t *s2, size_t n) |
| 413 | _UC_ATTRIBUTE_PURE; |
| 414 | extern int |
| 415 | u32_cmp (const uint32_t *s1, const uint32_t *s2, size_t n) |
| 416 | _UC_ATTRIBUTE_PURE; |
| 417 | |
| 418 | /* Compare S1 and S2. */ |
| 419 | /* Similar to the gnulib function memcmp2(). */ |
| 420 | extern int |
| 421 | u8_cmp2 (const uint8_t *s1, size_t n1, const uint8_t *s2, size_t n2) |
| 422 | _UC_ATTRIBUTE_PURE; |
| 423 | extern int |
| 424 | u16_cmp2 (const uint16_t *s1, size_t n1, const uint16_t *s2, size_t n2) |
| 425 | _UC_ATTRIBUTE_PURE; |
| 426 | extern int |
| 427 | u32_cmp2 (const uint32_t *s1, size_t n1, const uint32_t *s2, size_t n2) |
| 428 | _UC_ATTRIBUTE_PURE; |
| 429 | |
| 430 | /* Search the string at S for UC. */ |
| 431 | /* Similar to memchr(). */ |
| 432 | extern uint8_t * |
| 433 | u8_chr (const uint8_t *s, size_t n, ucs4_t uc) |
| 434 | _UC_ATTRIBUTE_PURE; |
| 435 | extern uint16_t * |
| 436 | u16_chr (const uint16_t *s, size_t n, ucs4_t uc) |
| 437 | _UC_ATTRIBUTE_PURE; |
| 438 | extern uint32_t * |
| 439 | u32_chr (const uint32_t *s, size_t n, ucs4_t uc) |
| 440 | _UC_ATTRIBUTE_PURE; |
| 441 | |
| 442 | /* Count the number of Unicode characters in the N units from S. */ |
| 443 | /* Similar to mbsnlen(). */ |
| 444 | extern size_t |
| 445 | u8_mbsnlen (const uint8_t *s, size_t n) |
| 446 | _UC_ATTRIBUTE_PURE; |
| 447 | extern size_t |
| 448 | u16_mbsnlen (const uint16_t *s, size_t n) |
| 449 | _UC_ATTRIBUTE_PURE; |
| 450 | extern size_t |
| 451 | u32_mbsnlen (const uint32_t *s, size_t n) |
| 452 | _UC_ATTRIBUTE_PURE; |
| 453 | |
| 454 | /* Elementary string functions with memory allocation. */ |
| 455 | |
| 456 | /* Make a freshly allocated copy of S, of length N. */ |
| 457 | extern uint8_t * |
| 458 | u8_cpy_alloc (const uint8_t *s, size_t n); |
| 459 | extern uint16_t * |
| 460 | u16_cpy_alloc (const uint16_t *s, size_t n); |
| 461 | extern uint32_t * |
| 462 | u32_cpy_alloc (const uint32_t *s, size_t n); |
| 463 | |
| 464 | /* Elementary string functions on NUL terminated strings. */ |
| 465 | |
| 466 | /* Return the length (number of units) of the first character in S. |
| 467 | Return 0 if it is the NUL character. Return -1 upon failure. */ |
| 468 | extern int |
| 469 | u8_strmblen (const uint8_t *s) |
| 470 | _UC_ATTRIBUTE_PURE; |
| 471 | extern int |
| 472 | u16_strmblen (const uint16_t *s) |
| 473 | _UC_ATTRIBUTE_PURE; |
| 474 | extern int |
| 475 | u32_strmblen (const uint32_t *s) |
| 476 | _UC_ATTRIBUTE_PURE; |
| 477 | |
| 478 | /* Return the length (number of units) of the first character in S, putting |
| 479 | its 'ucs4_t' representation in *PUC. Return 0 if it is the NUL |
| 480 | character. Return -1 upon failure. */ |
| 481 | extern int |
| 482 | u8_strmbtouc (ucs4_t *puc, const uint8_t *s); |
| 483 | extern int |
| 484 | u16_strmbtouc (ucs4_t *puc, const uint16_t *s); |
| 485 | extern int |
| 486 | u32_strmbtouc (ucs4_t *puc, const uint32_t *s); |
| 487 | |
| 488 | /* Forward iteration step. Advances the pointer past the next character, |
| 489 | or returns NULL if the end of the string has been reached. Puts the |
| 490 | character's 'ucs4_t' representation in *PUC. */ |
| 491 | extern const uint8_t * |
| 492 | u8_next (ucs4_t *puc, const uint8_t *s); |
| 493 | extern const uint16_t * |
| 494 | u16_next (ucs4_t *puc, const uint16_t *s); |
| 495 | extern const uint32_t * |
| 496 | u32_next (ucs4_t *puc, const uint32_t *s); |
| 497 | |
| 498 | /* Backward iteration step. Advances the pointer to point to the previous |
| 499 | character, or returns NULL if the beginning of the string had been reached. |
| 500 | Puts the character's 'ucs4_t' representation in *PUC. */ |
| 501 | extern const uint8_t * |
| 502 | u8_prev (ucs4_t *puc, const uint8_t *s, const uint8_t *start); |
| 503 | extern const uint16_t * |
| 504 | u16_prev (ucs4_t *puc, const uint16_t *s, const uint16_t *start); |
| 505 | extern const uint32_t * |
| 506 | u32_prev (ucs4_t *puc, const uint32_t *s, const uint32_t *start); |
| 507 | |
| 508 | /* Return the number of units in S. */ |
| 509 | /* Similar to strlen(), wcslen(). */ |
| 510 | extern size_t |
| 511 | u8_strlen (const uint8_t *s) |
| 512 | _UC_ATTRIBUTE_PURE; |
| 513 | extern size_t |
| 514 | u16_strlen (const uint16_t *s) |
| 515 | _UC_ATTRIBUTE_PURE; |
| 516 | extern size_t |
| 517 | u32_strlen (const uint32_t *s) |
| 518 | _UC_ATTRIBUTE_PURE; |
| 519 | |
| 520 | /* Return the number of units in S, but at most MAXLEN. */ |
| 521 | /* Similar to strnlen(), wcsnlen(). */ |
| 522 | extern size_t |
| 523 | u8_strnlen (const uint8_t *s, size_t maxlen) |
| 524 | _UC_ATTRIBUTE_PURE; |
| 525 | extern size_t |
| 526 | u16_strnlen (const uint16_t *s, size_t maxlen) |
| 527 | _UC_ATTRIBUTE_PURE; |
| 528 | extern size_t |
| 529 | u32_strnlen (const uint32_t *s, size_t maxlen) |
| 530 | _UC_ATTRIBUTE_PURE; |
| 531 | |
| 532 | /* Copy SRC to DEST. */ |
| 533 | /* Similar to strcpy(), wcscpy(). */ |
| 534 | extern uint8_t * |
| 535 | u8_strcpy (uint8_t *dest, const uint8_t *src); |
| 536 | extern uint16_t * |
| 537 | u16_strcpy (uint16_t *dest, const uint16_t *src); |
| 538 | extern uint32_t * |
| 539 | u32_strcpy (uint32_t *dest, const uint32_t *src); |
| 540 | |
| 541 | /* Copy SRC to DEST, returning the address of the terminating NUL in DEST. */ |
| 542 | /* Similar to stpcpy(). */ |
| 543 | extern uint8_t * |
| 544 | u8_stpcpy (uint8_t *dest, const uint8_t *src); |
| 545 | extern uint16_t * |
| 546 | u16_stpcpy (uint16_t *dest, const uint16_t *src); |
| 547 | extern uint32_t * |
| 548 | u32_stpcpy (uint32_t *dest, const uint32_t *src); |
| 549 | |
| 550 | /* Copy no more than N units of SRC to DEST. */ |
| 551 | /* Similar to strncpy(), wcsncpy(). */ |
| 552 | extern uint8_t * |
| 553 | u8_strncpy (uint8_t *dest, const uint8_t *src, size_t n); |
| 554 | extern uint16_t * |
| 555 | u16_strncpy (uint16_t *dest, const uint16_t *src, size_t n); |
| 556 | extern uint32_t * |
| 557 | u32_strncpy (uint32_t *dest, const uint32_t *src, size_t n); |
| 558 | |
| 559 | /* Copy no more than N units of SRC to DEST. Return a pointer past the last |
| 560 | non-NUL unit written into DEST. */ |
| 561 | /* Similar to stpncpy(). */ |
| 562 | extern uint8_t * |
| 563 | u8_stpncpy (uint8_t *dest, const uint8_t *src, size_t n); |
| 564 | extern uint16_t * |
| 565 | u16_stpncpy (uint16_t *dest, const uint16_t *src, size_t n); |
| 566 | extern uint32_t * |
| 567 | u32_stpncpy (uint32_t *dest, const uint32_t *src, size_t n); |
| 568 | |
| 569 | /* Append SRC onto DEST. */ |
| 570 | /* Similar to strcat(), wcscat(). */ |
| 571 | extern uint8_t * |
| 572 | u8_strcat (uint8_t *dest, const uint8_t *src); |
| 573 | extern uint16_t * |
| 574 | u16_strcat (uint16_t *dest, const uint16_t *src); |
| 575 | extern uint32_t * |
| 576 | u32_strcat (uint32_t *dest, const uint32_t *src); |
| 577 | |
| 578 | /* Append no more than N units of SRC onto DEST. */ |
| 579 | /* Similar to strncat(), wcsncat(). */ |
| 580 | extern uint8_t * |
| 581 | u8_strncat (uint8_t *dest, const uint8_t *src, size_t n); |
| 582 | extern uint16_t * |
| 583 | u16_strncat (uint16_t *dest, const uint16_t *src, size_t n); |
| 584 | extern uint32_t * |
| 585 | u32_strncat (uint32_t *dest, const uint32_t *src, size_t n); |
| 586 | |
| 587 | /* Compare S1 and S2. */ |
| 588 | /* Similar to strcmp(), wcscmp(). */ |
| 589 | #ifdef __sun |
| 590 | /* Avoid a collision with the u8_strcmp() function in Solaris 11 libc. */ |
| 591 | extern int |
| 592 | u8_strcmp_gnu (const uint8_t *s1, const uint8_t *s2) |
| 593 | _UC_ATTRIBUTE_PURE; |
| 594 | # define u8_strcmp u8_strcmp_gnu |
| 595 | #else |
| 596 | extern int |
| 597 | u8_strcmp (const uint8_t *s1, const uint8_t *s2) |
| 598 | _UC_ATTRIBUTE_PURE; |
| 599 | #endif |
| 600 | extern int |
| 601 | u16_strcmp (const uint16_t *s1, const uint16_t *s2) |
| 602 | _UC_ATTRIBUTE_PURE; |
| 603 | extern int |
| 604 | u32_strcmp (const uint32_t *s1, const uint32_t *s2) |
| 605 | _UC_ATTRIBUTE_PURE; |
| 606 | |
| 607 | /* Compare S1 and S2 using the collation rules of the current locale. |
| 608 | Return -1 if S1 < S2, 0 if S1 = S2, 1 if S1 > S2. |
| 609 | Upon failure, set errno and return any value. */ |
| 610 | /* Similar to strcoll(), wcscoll(). */ |
| 611 | extern int |
| 612 | u8_strcoll (const uint8_t *s1, const uint8_t *s2); |
| 613 | extern int |
| 614 | u16_strcoll (const uint16_t *s1, const uint16_t *s2); |
| 615 | extern int |
| 616 | u32_strcoll (const uint32_t *s1, const uint32_t *s2); |
| 617 | |
| 618 | /* Compare no more than N units of S1 and S2. */ |
| 619 | /* Similar to strncmp(), wcsncmp(). */ |
| 620 | extern int |
| 621 | u8_strncmp (const uint8_t *s1, const uint8_t *s2, size_t n) |
| 622 | _UC_ATTRIBUTE_PURE; |
| 623 | extern int |
| 624 | u16_strncmp (const uint16_t *s1, const uint16_t *s2, size_t n) |
| 625 | _UC_ATTRIBUTE_PURE; |
| 626 | extern int |
| 627 | u32_strncmp (const uint32_t *s1, const uint32_t *s2, size_t n) |
| 628 | _UC_ATTRIBUTE_PURE; |
| 629 | |
| 630 | /* Duplicate S, returning an identical malloc'd string. */ |
| 631 | /* Similar to strdup(), wcsdup(). */ |
| 632 | extern uint8_t * |
| 633 | u8_strdup (const uint8_t *s); |
| 634 | extern uint16_t * |
| 635 | u16_strdup (const uint16_t *s); |
| 636 | extern uint32_t * |
| 637 | u32_strdup (const uint32_t *s); |
| 638 | |
| 639 | /* Find the first occurrence of UC in STR. */ |
| 640 | /* Similar to strchr(), wcschr(). */ |
| 641 | extern uint8_t * |
| 642 | u8_strchr (const uint8_t *str, ucs4_t uc) |
| 643 | _UC_ATTRIBUTE_PURE; |
| 644 | extern uint16_t * |
| 645 | u16_strchr (const uint16_t *str, ucs4_t uc) |
| 646 | _UC_ATTRIBUTE_PURE; |
| 647 | extern uint32_t * |
| 648 | u32_strchr (const uint32_t *str, ucs4_t uc) |
| 649 | _UC_ATTRIBUTE_PURE; |
| 650 | |
| 651 | /* Find the last occurrence of UC in STR. */ |
| 652 | /* Similar to strrchr(), wcsrchr(). */ |
| 653 | extern uint8_t * |
| 654 | u8_strrchr (const uint8_t *str, ucs4_t uc) |
| 655 | _UC_ATTRIBUTE_PURE; |
| 656 | extern uint16_t * |
| 657 | u16_strrchr (const uint16_t *str, ucs4_t uc) |
| 658 | _UC_ATTRIBUTE_PURE; |
| 659 | extern uint32_t * |
| 660 | u32_strrchr (const uint32_t *str, ucs4_t uc) |
| 661 | _UC_ATTRIBUTE_PURE; |
| 662 | |
| 663 | /* Return the length of the initial segment of STR which consists entirely |
| 664 | of Unicode characters not in REJECT. */ |
| 665 | /* Similar to strcspn(), wcscspn(). */ |
| 666 | extern size_t |
| 667 | u8_strcspn (const uint8_t *str, const uint8_t *reject) |
| 668 | _UC_ATTRIBUTE_PURE; |
| 669 | extern size_t |
| 670 | u16_strcspn (const uint16_t *str, const uint16_t *reject) |
| 671 | _UC_ATTRIBUTE_PURE; |
| 672 | extern size_t |
| 673 | u32_strcspn (const uint32_t *str, const uint32_t *reject) |
| 674 | _UC_ATTRIBUTE_PURE; |
| 675 | |
| 676 | /* Return the length of the initial segment of STR which consists entirely |
| 677 | of Unicode characters in ACCEPT. */ |
| 678 | /* Similar to strspn(), wcsspn(). */ |
| 679 | extern size_t |
| 680 | u8_strspn (const uint8_t *str, const uint8_t *accept) |
| 681 | _UC_ATTRIBUTE_PURE; |
| 682 | extern size_t |
| 683 | u16_strspn (const uint16_t *str, const uint16_t *accept) |
| 684 | _UC_ATTRIBUTE_PURE; |
| 685 | extern size_t |
| 686 | u32_strspn (const uint32_t *str, const uint32_t *accept) |
| 687 | _UC_ATTRIBUTE_PURE; |
| 688 | |
| 689 | /* Find the first occurrence in STR of any character in ACCEPT. */ |
| 690 | /* Similar to strpbrk(), wcspbrk(). */ |
| 691 | extern uint8_t * |
| 692 | u8_strpbrk (const uint8_t *str, const uint8_t *accept) |
| 693 | _UC_ATTRIBUTE_PURE; |
| 694 | extern uint16_t * |
| 695 | u16_strpbrk (const uint16_t *str, const uint16_t *accept) |
| 696 | _UC_ATTRIBUTE_PURE; |
| 697 | extern uint32_t * |
| 698 | u32_strpbrk (const uint32_t *str, const uint32_t *accept) |
| 699 | _UC_ATTRIBUTE_PURE; |
| 700 | |
| 701 | /* Find the first occurrence of NEEDLE in HAYSTACK. */ |
| 702 | /* Similar to strstr(), wcsstr(). */ |
| 703 | extern uint8_t * |
| 704 | u8_strstr (const uint8_t *haystack, const uint8_t *needle) |
| 705 | _UC_ATTRIBUTE_PURE; |
| 706 | extern uint16_t * |
| 707 | u16_strstr (const uint16_t *haystack, const uint16_t *needle) |
| 708 | _UC_ATTRIBUTE_PURE; |
| 709 | extern uint32_t * |
| 710 | u32_strstr (const uint32_t *haystack, const uint32_t *needle) |
| 711 | _UC_ATTRIBUTE_PURE; |
| 712 | |
| 713 | /* Test whether STR starts with PREFIX. */ |
| 714 | extern bool |
| 715 | u8_startswith (const uint8_t *str, const uint8_t *prefix) |
| 716 | _UC_ATTRIBUTE_PURE; |
| 717 | extern bool |
| 718 | u16_startswith (const uint16_t *str, const uint16_t *prefix) |
| 719 | _UC_ATTRIBUTE_PURE; |
| 720 | extern bool |
| 721 | u32_startswith (const uint32_t *str, const uint32_t *prefix) |
| 722 | _UC_ATTRIBUTE_PURE; |
| 723 | |
| 724 | /* Test whether STR ends with SUFFIX. */ |
| 725 | extern bool |
| 726 | u8_endswith (const uint8_t *str, const uint8_t *suffix) |
| 727 | _UC_ATTRIBUTE_PURE; |
| 728 | extern bool |
| 729 | u16_endswith (const uint16_t *str, const uint16_t *suffix) |
| 730 | _UC_ATTRIBUTE_PURE; |
| 731 | extern bool |
| 732 | u32_endswith (const uint32_t *str, const uint32_t *suffix) |
| 733 | _UC_ATTRIBUTE_PURE; |
| 734 | |
| 735 | /* Divide STR into tokens separated by characters in DELIM. |
| 736 | This interface is actually more similar to wcstok than to strtok. */ |
| 737 | /* Similar to strtok_r(), wcstok(). */ |
| 738 | extern uint8_t * |
| 739 | u8_strtok (uint8_t *str, const uint8_t *delim, uint8_t **ptr); |
| 740 | extern uint16_t * |
| 741 | u16_strtok (uint16_t *str, const uint16_t *delim, uint16_t **ptr); |
| 742 | extern uint32_t * |
| 743 | u32_strtok (uint32_t *str, const uint32_t *delim, uint32_t **ptr); |
| 744 | |
| 745 | |
| 746 | #ifdef __cplusplus |
| 747 | } |
| 748 | #endif |
| 749 | |
| 750 | #endif /* _UNISTR_H */ |