Chih-Hung Hsieh | a5ef72f | 2014-11-05 10:47:59 -0800 | [diff] [blame] | 1 | /* Machine-independant string function optimizations. |
| 2 | Copyright (C) 1997-2003, 2004, 2007, 2008 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | 02111-1307 USA. */ |
| 20 | |
| 21 | #ifndef _STRING_H |
| 22 | # error "Never use <bits/string2.h> directly; include <string.h> instead." |
| 23 | #endif |
| 24 | |
| 25 | #if !defined __NO_STRING_INLINES && !defined __BOUNDED_POINTERS__ |
| 26 | |
| 27 | /* Unlike the definitions in the header <bits/string.h> the |
| 28 | definitions contained here are not optimized down to assembler |
| 29 | level. Those optimizations are not always a good idea since this |
| 30 | means the code size increases a lot. Instead the definitions here |
| 31 | optimize some functions in a way which do not dramatically |
| 32 | increase the code size and which do not use assembler. The main |
| 33 | trick is to use GCC's `__builtin_constant_p' function. |
| 34 | |
| 35 | Every function XXX which has a defined version in |
| 36 | <bits/string.h> must be accompanied by a symbol _HAVE_STRING_ARCH_XXX |
| 37 | to make sure we don't get redefinitions. |
| 38 | |
| 39 | We must use here macros instead of inline functions since the |
| 40 | trick won't work with the latter. */ |
| 41 | |
| 42 | #ifndef __STRING_INLINE |
| 43 | # ifdef __cplusplus |
| 44 | # define __STRING_INLINE inline |
| 45 | # else |
| 46 | # define __STRING_INLINE __extern_inline |
| 47 | # endif |
| 48 | #endif |
| 49 | |
| 50 | #if _STRING_ARCH_unaligned |
| 51 | /* If we can do unaligned memory accesses we must know the endianess. */ |
| 52 | # include <endian.h> |
| 53 | # include <bits/types.h> |
| 54 | |
| 55 | # if __BYTE_ORDER == __LITTLE_ENDIAN |
| 56 | # define __STRING2_SMALL_GET16(src, idx) \ |
| 57 | (((__const unsigned char *) (__const char *) (src))[idx + 1] << 8 \ |
| 58 | | ((__const unsigned char *) (__const char *) (src))[idx]) |
| 59 | # define __STRING2_SMALL_GET32(src, idx) \ |
| 60 | (((((__const unsigned char *) (__const char *) (src))[idx + 3] << 8 \ |
| 61 | | ((__const unsigned char *) (__const char *) (src))[idx + 2]) << 8 \ |
| 62 | | ((__const unsigned char *) (__const char *) (src))[idx + 1]) << 8 \ |
| 63 | | ((__const unsigned char *) (__const char *) (src))[idx]) |
| 64 | # else |
| 65 | # define __STRING2_SMALL_GET16(src, idx) \ |
| 66 | (((__const unsigned char *) (__const char *) (src))[idx] << 8 \ |
| 67 | | ((__const unsigned char *) (__const char *) (src))[idx + 1]) |
| 68 | # define __STRING2_SMALL_GET32(src, idx) \ |
| 69 | (((((__const unsigned char *) (__const char *) (src))[idx] << 8 \ |
| 70 | | ((__const unsigned char *) (__const char *) (src))[idx + 1]) << 8 \ |
| 71 | | ((__const unsigned char *) (__const char *) (src))[idx + 2]) << 8 \ |
| 72 | | ((__const unsigned char *) (__const char *) (src))[idx + 3]) |
| 73 | # endif |
| 74 | #else |
| 75 | /* These are a few types we need for the optimizations if we cannot |
| 76 | use unaligned memory accesses. */ |
| 77 | # define __STRING2_COPY_TYPE(N) \ |
| 78 | typedef struct { unsigned char __arr[N]; } \ |
| 79 | __attribute__ ((__packed__)) __STRING2_COPY_ARR##N |
| 80 | __STRING2_COPY_TYPE (2); |
| 81 | __STRING2_COPY_TYPE (3); |
| 82 | __STRING2_COPY_TYPE (4); |
| 83 | __STRING2_COPY_TYPE (5); |
| 84 | __STRING2_COPY_TYPE (6); |
| 85 | __STRING2_COPY_TYPE (7); |
| 86 | __STRING2_COPY_TYPE (8); |
| 87 | # undef __STRING2_COPY_TYPE |
| 88 | #endif |
| 89 | |
| 90 | /* Dereferencing a pointer arg to run sizeof on it fails for the void |
| 91 | pointer case, so we use this instead. |
| 92 | Note that __x is evaluated twice. */ |
| 93 | #define __string2_1bptr_p(__x) \ |
| 94 | ((size_t)(const void *)((__x) + 1) - (size_t)(const void *)(__x) == 1) |
| 95 | |
| 96 | /* Set N bytes of S to C. */ |
| 97 | #if !defined _HAVE_STRING_ARCH_memset |
| 98 | # if !__GNUC_PREREQ (3, 0) |
| 99 | # if _STRING_ARCH_unaligned |
| 100 | # define memset(s, c, n) \ |
| 101 | (__extension__ (__builtin_constant_p (n) && (n) <= 16 \ |
| 102 | ? ((n) == 1 \ |
| 103 | ? __memset_1 (s, c) \ |
| 104 | : __memset_gc (s, c, n)) \ |
| 105 | : (__builtin_constant_p (c) && (c) == '\0' \ |
| 106 | ? ({ void *__s = (s); __bzero (__s, n); __s; }) \ |
| 107 | : memset (s, c, n)))) |
| 108 | |
| 109 | # define __memset_1(s, c) ({ void *__s = (s); \ |
| 110 | *((__uint8_t *) __s) = (__uint8_t) c; __s; }) |
| 111 | |
| 112 | # define __memset_gc(s, c, n) \ |
| 113 | ({ void *__s = (s); \ |
| 114 | union { \ |
| 115 | unsigned int __ui; \ |
| 116 | unsigned short int __usi; \ |
| 117 | unsigned char __uc; \ |
| 118 | } *__u = __s; \ |
| 119 | __uint8_t __c = (__uint8_t) (c); \ |
| 120 | \ |
| 121 | /* This `switch' statement will be removed at compile-time. */ \ |
| 122 | switch ((unsigned int) (n)) \ |
| 123 | { \ |
| 124 | case 15: \ |
| 125 | __u->__ui = __c * 0x01010101; \ |
| 126 | __u = __extension__ ((void *) __u + 4); \ |
| 127 | case 11: \ |
| 128 | __u->__ui = __c * 0x01010101; \ |
| 129 | __u = __extension__ ((void *) __u + 4); \ |
| 130 | case 7: \ |
| 131 | __u->__ui = __c * 0x01010101; \ |
| 132 | __u = __extension__ ((void *) __u + 4); \ |
| 133 | case 3: \ |
| 134 | __u->__usi = (unsigned short int) __c * 0x0101; \ |
| 135 | __u = __extension__ ((void *) __u + 2); \ |
| 136 | __u->__uc = (unsigned char) __c; \ |
| 137 | break; \ |
| 138 | \ |
| 139 | case 14: \ |
| 140 | __u->__ui = __c * 0x01010101; \ |
| 141 | __u = __extension__ ((void *) __u + 4); \ |
| 142 | case 10: \ |
| 143 | __u->__ui = __c * 0x01010101; \ |
| 144 | __u = __extension__ ((void *) __u + 4); \ |
| 145 | case 6: \ |
| 146 | __u->__ui = __c * 0x01010101; \ |
| 147 | __u = __extension__ ((void *) __u + 4); \ |
| 148 | case 2: \ |
| 149 | __u->__usi = (unsigned short int) __c * 0x0101; \ |
| 150 | break; \ |
| 151 | \ |
| 152 | case 13: \ |
| 153 | __u->__ui = __c * 0x01010101; \ |
| 154 | __u = __extension__ ((void *) __u + 4); \ |
| 155 | case 9: \ |
| 156 | __u->__ui = __c * 0x01010101; \ |
| 157 | __u = __extension__ ((void *) __u + 4); \ |
| 158 | case 5: \ |
| 159 | __u->__ui = __c * 0x01010101; \ |
| 160 | __u = __extension__ ((void *) __u + 4); \ |
| 161 | case 1: \ |
| 162 | __u->__uc = (unsigned char) __c; \ |
| 163 | break; \ |
| 164 | \ |
| 165 | case 16: \ |
| 166 | __u->__ui = __c * 0x01010101; \ |
| 167 | __u = __extension__ ((void *) __u + 4); \ |
| 168 | case 12: \ |
| 169 | __u->__ui = __c * 0x01010101; \ |
| 170 | __u = __extension__ ((void *) __u + 4); \ |
| 171 | case 8: \ |
| 172 | __u->__ui = __c * 0x01010101; \ |
| 173 | __u = __extension__ ((void *) __u + 4); \ |
| 174 | case 4: \ |
| 175 | __u->__ui = __c * 0x01010101; \ |
| 176 | case 0: \ |
| 177 | break; \ |
| 178 | } \ |
| 179 | \ |
| 180 | __s; }) |
| 181 | # else |
| 182 | # define memset(s, c, n) \ |
| 183 | (__extension__ (__builtin_constant_p (c) && (c) == '\0' \ |
| 184 | ? ({ void *__s = (s); __bzero (__s, n); __s; }) \ |
| 185 | : memset (s, c, n))) |
| 186 | # endif |
| 187 | # endif |
| 188 | |
| 189 | /* GCC < 3.0 optimizes memset(s, 0, n) but not bzero(s, n). |
| 190 | The optimization is broken before EGCS 1.1. |
| 191 | GCC 3.0+ has __builtin_bzero as well, but at least till GCC 3.4 |
| 192 | if it decides to call the library function, it calls memset |
| 193 | and not bzero. */ |
| 194 | # if __GNUC_PREREQ (2, 91) |
| 195 | # define __bzero(s, n) __builtin_memset (s, '\0', n) |
| 196 | # endif |
| 197 | |
| 198 | #endif |
| 199 | |
| 200 | |
| 201 | /* Copy N bytes from SRC to DEST, returning pointer to byte following the |
| 202 | last copied. */ |
| 203 | #ifdef __USE_GNU |
| 204 | # if !defined _HAVE_STRING_ARCH_mempcpy || defined _FORCE_INLINES |
| 205 | # ifndef _HAVE_STRING_ARCH_mempcpy |
| 206 | # if __GNUC_PREREQ (3, 4) |
| 207 | # define __mempcpy(dest, src, n) __builtin_mempcpy (dest, src, n) |
| 208 | # elif __GNUC_PREREQ (3, 0) |
| 209 | # define __mempcpy(dest, src, n) \ |
| 210 | (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ |
| 211 | && __string2_1bptr_p (src) && n <= 8 \ |
| 212 | ? __builtin_memcpy (dest, src, n) + (n) \ |
| 213 | : __mempcpy (dest, src, n))) |
| 214 | # else |
| 215 | # define __mempcpy(dest, src, n) \ |
| 216 | (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ |
| 217 | && __string2_1bptr_p (src) && n <= 8 \ |
| 218 | ? __mempcpy_small (dest, __mempcpy_args (src), n) \ |
| 219 | : __mempcpy (dest, src, n))) |
| 220 | # endif |
| 221 | /* In glibc we use this function frequently but for namespace reasons |
| 222 | we have to use the name `__mempcpy'. */ |
| 223 | # define mempcpy(dest, src, n) __mempcpy (dest, src, n) |
| 224 | # endif |
| 225 | |
| 226 | # if !__GNUC_PREREQ (3, 0) || defined _FORCE_INLINES |
| 227 | # if _STRING_ARCH_unaligned |
| 228 | # ifndef _FORCE_INLINES |
| 229 | # define __mempcpy_args(src) \ |
| 230 | ((__const char *) (src))[0], ((__const char *) (src))[2], \ |
| 231 | ((__const char *) (src))[4], ((__const char *) (src))[6], \ |
| 232 | __extension__ __STRING2_SMALL_GET16 (src, 0), \ |
| 233 | __extension__ __STRING2_SMALL_GET16 (src, 4), \ |
| 234 | __extension__ __STRING2_SMALL_GET32 (src, 0), \ |
| 235 | __extension__ __STRING2_SMALL_GET32 (src, 4) |
| 236 | # endif |
| 237 | __STRING_INLINE void *__mempcpy_small (void *, char, char, char, char, |
| 238 | __uint16_t, __uint16_t, __uint32_t, |
| 239 | __uint32_t, size_t); |
| 240 | __STRING_INLINE void * |
| 241 | __mempcpy_small (void *__dest1, |
| 242 | char __src0_1, char __src2_1, char __src4_1, char __src6_1, |
| 243 | __uint16_t __src0_2, __uint16_t __src4_2, |
| 244 | __uint32_t __src0_4, __uint32_t __src4_4, |
| 245 | size_t __srclen) |
| 246 | { |
| 247 | union { |
| 248 | __uint32_t __ui; |
| 249 | __uint16_t __usi; |
| 250 | unsigned char __uc; |
| 251 | unsigned char __c; |
| 252 | } *__u = __dest1; |
| 253 | switch ((unsigned int) __srclen) |
| 254 | { |
| 255 | case 1: |
| 256 | __u->__c = __src0_1; |
| 257 | __u = __extension__ ((void *) __u + 1); |
| 258 | break; |
| 259 | case 2: |
| 260 | __u->__usi = __src0_2; |
| 261 | __u = __extension__ ((void *) __u + 2); |
| 262 | break; |
| 263 | case 3: |
| 264 | __u->__usi = __src0_2; |
| 265 | __u = __extension__ ((void *) __u + 2); |
| 266 | __u->__c = __src2_1; |
| 267 | __u = __extension__ ((void *) __u + 1); |
| 268 | break; |
| 269 | case 4: |
| 270 | __u->__ui = __src0_4; |
| 271 | __u = __extension__ ((void *) __u + 4); |
| 272 | break; |
| 273 | case 5: |
| 274 | __u->__ui = __src0_4; |
| 275 | __u = __extension__ ((void *) __u + 4); |
| 276 | __u->__c = __src4_1; |
| 277 | __u = __extension__ ((void *) __u + 1); |
| 278 | break; |
| 279 | case 6: |
| 280 | __u->__ui = __src0_4; |
| 281 | __u = __extension__ ((void *) __u + 4); |
| 282 | __u->__usi = __src4_2; |
| 283 | __u = __extension__ ((void *) __u + 2); |
| 284 | break; |
| 285 | case 7: |
| 286 | __u->__ui = __src0_4; |
| 287 | __u = __extension__ ((void *) __u + 4); |
| 288 | __u->__usi = __src4_2; |
| 289 | __u = __extension__ ((void *) __u + 2); |
| 290 | __u->__c = __src6_1; |
| 291 | __u = __extension__ ((void *) __u + 1); |
| 292 | break; |
| 293 | case 8: |
| 294 | __u->__ui = __src0_4; |
| 295 | __u = __extension__ ((void *) __u + 4); |
| 296 | __u->__ui = __src4_4; |
| 297 | __u = __extension__ ((void *) __u + 4); |
| 298 | break; |
| 299 | } |
| 300 | return (void *) __u; |
| 301 | } |
| 302 | # else |
| 303 | # ifndef _FORCE_INLINES |
| 304 | # define __mempcpy_args(src) \ |
| 305 | ((__const char *) (src))[0], \ |
| 306 | __extension__ ((__STRING2_COPY_ARR2) \ |
| 307 | { { ((__const char *) (src))[0], ((__const char *) (src))[1] } }), \ |
| 308 | __extension__ ((__STRING2_COPY_ARR3) \ |
| 309 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 310 | ((__const char *) (src))[2] } }), \ |
| 311 | __extension__ ((__STRING2_COPY_ARR4) \ |
| 312 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 313 | ((__const char *) (src))[2], ((__const char *) (src))[3] } }), \ |
| 314 | __extension__ ((__STRING2_COPY_ARR5) \ |
| 315 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 316 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 317 | ((__const char *) (src))[4] } }), \ |
| 318 | __extension__ ((__STRING2_COPY_ARR6) \ |
| 319 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 320 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 321 | ((__const char *) (src))[4], ((__const char *) (src))[5] } }), \ |
| 322 | __extension__ ((__STRING2_COPY_ARR7) \ |
| 323 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 324 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 325 | ((__const char *) (src))[4], ((__const char *) (src))[5], \ |
| 326 | ((__const char *) (src))[6] } }), \ |
| 327 | __extension__ ((__STRING2_COPY_ARR8) \ |
| 328 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 329 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 330 | ((__const char *) (src))[4], ((__const char *) (src))[5], \ |
| 331 | ((__const char *) (src))[6], ((__const char *) (src))[7] } }) |
| 332 | # endif |
| 333 | __STRING_INLINE void *__mempcpy_small (void *, char, __STRING2_COPY_ARR2, |
| 334 | __STRING2_COPY_ARR3, |
| 335 | __STRING2_COPY_ARR4, |
| 336 | __STRING2_COPY_ARR5, |
| 337 | __STRING2_COPY_ARR6, |
| 338 | __STRING2_COPY_ARR7, |
| 339 | __STRING2_COPY_ARR8, size_t); |
| 340 | __STRING_INLINE void * |
| 341 | __mempcpy_small (void *__dest, char __src1, |
| 342 | __STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3, |
| 343 | __STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5, |
| 344 | __STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7, |
| 345 | __STRING2_COPY_ARR8 __src8, size_t __srclen) |
| 346 | { |
| 347 | union { |
| 348 | char __c; |
| 349 | __STRING2_COPY_ARR2 __sca2; |
| 350 | __STRING2_COPY_ARR3 __sca3; |
| 351 | __STRING2_COPY_ARR4 __sca4; |
| 352 | __STRING2_COPY_ARR5 __sca5; |
| 353 | __STRING2_COPY_ARR6 __sca6; |
| 354 | __STRING2_COPY_ARR7 __sca7; |
| 355 | __STRING2_COPY_ARR8 __sca8; |
| 356 | } *__u = __dest; |
| 357 | switch ((unsigned int) __srclen) |
| 358 | { |
| 359 | case 1: |
| 360 | __u->__c = __src1; |
| 361 | break; |
| 362 | case 2: |
| 363 | __extension__ __u->__sca2 = __src2; |
| 364 | break; |
| 365 | case 3: |
| 366 | __extension__ __u->__sca3 = __src3; |
| 367 | break; |
| 368 | case 4: |
| 369 | __extension__ __u->__sca4 = __src4; |
| 370 | break; |
| 371 | case 5: |
| 372 | __extension__ __u->__sca5 = __src5; |
| 373 | break; |
| 374 | case 6: |
| 375 | __extension__ __u->__sca6 = __src6; |
| 376 | break; |
| 377 | case 7: |
| 378 | __extension__ __u->__sca7 = __src7; |
| 379 | break; |
| 380 | case 8: |
| 381 | __extension__ __u->__sca8 = __src8; |
| 382 | break; |
| 383 | } |
| 384 | return __extension__ ((void *) __u + __srclen); |
| 385 | } |
| 386 | # endif |
| 387 | # endif |
| 388 | # endif |
| 389 | #endif |
| 390 | |
| 391 | |
| 392 | /* Return pointer to C in S. */ |
| 393 | #ifndef _HAVE_STRING_ARCH_strchr |
| 394 | extern void *__rawmemchr (const void *__s, int __c); |
| 395 | # if __GNUC_PREREQ (3, 2) |
| 396 | # define strchr(s, c) \ |
| 397 | (__extension__ (__builtin_constant_p (c) && !__builtin_constant_p (s) \ |
| 398 | && (c) == '\0' \ |
| 399 | ? (char *) __rawmemchr (s, c) \ |
| 400 | : __builtin_strchr (s, c))) |
| 401 | # else |
| 402 | # define strchr(s, c) \ |
| 403 | (__extension__ (__builtin_constant_p (c) && (c) == '\0' \ |
| 404 | ? (char *) __rawmemchr (s, c) \ |
| 405 | : strchr (s, c))) |
| 406 | # endif |
| 407 | #endif |
| 408 | |
| 409 | |
| 410 | /* Copy SRC to DEST. */ |
| 411 | #if (!defined _HAVE_STRING_ARCH_strcpy && !__GNUC_PREREQ (3, 0)) \ |
| 412 | || defined _FORCE_INLINES |
| 413 | # if !defined _HAVE_STRING_ARCH_strcpy && !__GNUC_PREREQ (3, 0) |
| 414 | # define strcpy(dest, src) \ |
| 415 | (__extension__ (__builtin_constant_p (src) \ |
| 416 | ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ |
| 417 | ? __strcpy_small (dest, __strcpy_args (src), \ |
| 418 | strlen (src) + 1) \ |
| 419 | : (char *) memcpy (dest, src, strlen (src) + 1)) \ |
| 420 | : strcpy (dest, src))) |
| 421 | # endif |
| 422 | |
| 423 | # if _STRING_ARCH_unaligned |
| 424 | # ifndef _FORCE_INLINES |
| 425 | # define __strcpy_args(src) \ |
| 426 | __extension__ __STRING2_SMALL_GET16 (src, 0), \ |
| 427 | __extension__ __STRING2_SMALL_GET16 (src, 4), \ |
| 428 | __extension__ __STRING2_SMALL_GET32 (src, 0), \ |
| 429 | __extension__ __STRING2_SMALL_GET32 (src, 4) |
| 430 | # endif |
| 431 | __STRING_INLINE char *__strcpy_small (char *, __uint16_t, __uint16_t, |
| 432 | __uint32_t, __uint32_t, size_t); |
| 433 | __STRING_INLINE char * |
| 434 | __strcpy_small (char *__dest, |
| 435 | __uint16_t __src0_2, __uint16_t __src4_2, |
| 436 | __uint32_t __src0_4, __uint32_t __src4_4, |
| 437 | size_t __srclen) |
| 438 | { |
| 439 | union { |
| 440 | __uint32_t __ui; |
| 441 | __uint16_t __usi; |
| 442 | unsigned char __uc; |
| 443 | } *__u = (void *) __dest; |
| 444 | switch ((unsigned int) __srclen) |
| 445 | { |
| 446 | case 1: |
| 447 | __u->__uc = '\0'; |
| 448 | break; |
| 449 | case 2: |
| 450 | __u->__usi = __src0_2; |
| 451 | break; |
| 452 | case 3: |
| 453 | __u->__usi = __src0_2; |
| 454 | __u = __extension__ ((void *) __u + 2); |
| 455 | __u->__uc = '\0'; |
| 456 | break; |
| 457 | case 4: |
| 458 | __u->__ui = __src0_4; |
| 459 | break; |
| 460 | case 5: |
| 461 | __u->__ui = __src0_4; |
| 462 | __u = __extension__ ((void *) __u + 4); |
| 463 | __u->__uc = '\0'; |
| 464 | break; |
| 465 | case 6: |
| 466 | __u->__ui = __src0_4; |
| 467 | __u = __extension__ ((void *) __u + 4); |
| 468 | __u->__usi = __src4_2; |
| 469 | break; |
| 470 | case 7: |
| 471 | __u->__ui = __src0_4; |
| 472 | __u = __extension__ ((void *) __u + 4); |
| 473 | __u->__usi = __src4_2; |
| 474 | __u = __extension__ ((void *) __u + 2); |
| 475 | __u->__uc = '\0'; |
| 476 | break; |
| 477 | case 8: |
| 478 | __u->__ui = __src0_4; |
| 479 | __u = __extension__ ((void *) __u + 4); |
| 480 | __u->__ui = __src4_4; |
| 481 | break; |
| 482 | } |
| 483 | return __dest; |
| 484 | } |
| 485 | # else |
| 486 | # ifndef _FORCE_INLINES |
| 487 | # define __strcpy_args(src) \ |
| 488 | __extension__ ((__STRING2_COPY_ARR2) \ |
| 489 | { { ((__const char *) (src))[0], '\0' } }), \ |
| 490 | __extension__ ((__STRING2_COPY_ARR3) \ |
| 491 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 492 | '\0' } }), \ |
| 493 | __extension__ ((__STRING2_COPY_ARR4) \ |
| 494 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 495 | ((__const char *) (src))[2], '\0' } }), \ |
| 496 | __extension__ ((__STRING2_COPY_ARR5) \ |
| 497 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 498 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 499 | '\0' } }), \ |
| 500 | __extension__ ((__STRING2_COPY_ARR6) \ |
| 501 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 502 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 503 | ((__const char *) (src))[4], '\0' } }), \ |
| 504 | __extension__ ((__STRING2_COPY_ARR7) \ |
| 505 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 506 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 507 | ((__const char *) (src))[4], ((__const char *) (src))[5], \ |
| 508 | '\0' } }), \ |
| 509 | __extension__ ((__STRING2_COPY_ARR8) \ |
| 510 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 511 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 512 | ((__const char *) (src))[4], ((__const char *) (src))[5], \ |
| 513 | ((__const char *) (src))[6], '\0' } }) |
| 514 | # endif |
| 515 | __STRING_INLINE char *__strcpy_small (char *, __STRING2_COPY_ARR2, |
| 516 | __STRING2_COPY_ARR3, |
| 517 | __STRING2_COPY_ARR4, |
| 518 | __STRING2_COPY_ARR5, |
| 519 | __STRING2_COPY_ARR6, |
| 520 | __STRING2_COPY_ARR7, |
| 521 | __STRING2_COPY_ARR8, size_t); |
| 522 | __STRING_INLINE char * |
| 523 | __strcpy_small (char *__dest, |
| 524 | __STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3, |
| 525 | __STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5, |
| 526 | __STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7, |
| 527 | __STRING2_COPY_ARR8 __src8, size_t __srclen) |
| 528 | { |
| 529 | union { |
| 530 | char __c; |
| 531 | __STRING2_COPY_ARR2 __sca2; |
| 532 | __STRING2_COPY_ARR3 __sca3; |
| 533 | __STRING2_COPY_ARR4 __sca4; |
| 534 | __STRING2_COPY_ARR5 __sca5; |
| 535 | __STRING2_COPY_ARR6 __sca6; |
| 536 | __STRING2_COPY_ARR7 __sca7; |
| 537 | __STRING2_COPY_ARR8 __sca8; |
| 538 | } *__u = (void *) __dest; |
| 539 | switch ((unsigned int) __srclen) |
| 540 | { |
| 541 | case 1: |
| 542 | __u->__c = '\0'; |
| 543 | break; |
| 544 | case 2: |
| 545 | __extension__ __u->__sca2 = __src2; |
| 546 | break; |
| 547 | case 3: |
| 548 | __extension__ __u->__sca3 = __src3; |
| 549 | break; |
| 550 | case 4: |
| 551 | __extension__ __u->__sca4 = __src4; |
| 552 | break; |
| 553 | case 5: |
| 554 | __extension__ __u->__sca5 = __src5; |
| 555 | break; |
| 556 | case 6: |
| 557 | __extension__ __u->__sca6 = __src6; |
| 558 | break; |
| 559 | case 7: |
| 560 | __extension__ __u->__sca7 = __src7; |
| 561 | break; |
| 562 | case 8: |
| 563 | __extension__ __u->__sca8 = __src8; |
| 564 | break; |
| 565 | } |
| 566 | return __dest; |
| 567 | } |
| 568 | # endif |
| 569 | #endif |
| 570 | |
| 571 | |
| 572 | /* Copy SRC to DEST, returning pointer to final NUL byte. */ |
| 573 | #ifdef __USE_GNU |
| 574 | # if !defined _HAVE_STRING_ARCH_stpcpy || defined _FORCE_INLINES |
| 575 | # ifndef _HAVE_STRING_ARCH_stpcpy |
| 576 | # if __GNUC_PREREQ (3, 4) |
| 577 | # define __stpcpy(dest, src) __builtin_stpcpy (dest, src) |
| 578 | # elif __GNUC_PREREQ (3, 0) |
| 579 | # define __stpcpy(dest, src) \ |
| 580 | (__extension__ (__builtin_constant_p (src) \ |
| 581 | ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ |
| 582 | ? __builtin_strcpy (dest, src) + strlen (src) \ |
| 583 | : ((char *) (__mempcpy) (dest, src, strlen (src) + 1) \ |
| 584 | - 1)) \ |
| 585 | : __stpcpy (dest, src))) |
| 586 | # else |
| 587 | # define __stpcpy(dest, src) \ |
| 588 | (__extension__ (__builtin_constant_p (src) \ |
| 589 | ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ |
| 590 | ? __stpcpy_small (dest, __stpcpy_args (src), \ |
| 591 | strlen (src) + 1) \ |
| 592 | : ((char *) (__mempcpy) (dest, src, strlen (src) + 1) \ |
| 593 | - 1)) \ |
| 594 | : __stpcpy (dest, src))) |
| 595 | # endif |
| 596 | /* In glibc we use this function frequently but for namespace reasons |
| 597 | we have to use the name `__stpcpy'. */ |
| 598 | # define stpcpy(dest, src) __stpcpy (dest, src) |
| 599 | # endif |
| 600 | |
| 601 | # if !__GNUC_PREREQ (3, 0) || defined _FORCE_INLINES |
| 602 | # if _STRING_ARCH_unaligned |
| 603 | # ifndef _FORCE_INLINES |
| 604 | # define __stpcpy_args(src) \ |
| 605 | __extension__ __STRING2_SMALL_GET16 (src, 0), \ |
| 606 | __extension__ __STRING2_SMALL_GET16 (src, 4), \ |
| 607 | __extension__ __STRING2_SMALL_GET32 (src, 0), \ |
| 608 | __extension__ __STRING2_SMALL_GET32 (src, 4) |
| 609 | # endif |
| 610 | __STRING_INLINE char *__stpcpy_small (char *, __uint16_t, __uint16_t, |
| 611 | __uint32_t, __uint32_t, size_t); |
| 612 | __STRING_INLINE char * |
| 613 | __stpcpy_small (char *__dest, |
| 614 | __uint16_t __src0_2, __uint16_t __src4_2, |
| 615 | __uint32_t __src0_4, __uint32_t __src4_4, |
| 616 | size_t __srclen) |
| 617 | { |
| 618 | union { |
| 619 | unsigned int __ui; |
| 620 | unsigned short int __usi; |
| 621 | unsigned char __uc; |
| 622 | char __c; |
| 623 | } *__u = (void *) __dest; |
| 624 | switch ((unsigned int) __srclen) |
| 625 | { |
| 626 | case 1: |
| 627 | __u->__uc = '\0'; |
| 628 | break; |
| 629 | case 2: |
| 630 | __u->__usi = __src0_2; |
| 631 | __u = __extension__ ((void *) __u + 1); |
| 632 | break; |
| 633 | case 3: |
| 634 | __u->__usi = __src0_2; |
| 635 | __u = __extension__ ((void *) __u + 2); |
| 636 | __u->__uc = '\0'; |
| 637 | break; |
| 638 | case 4: |
| 639 | __u->__ui = __src0_4; |
| 640 | __u = __extension__ ((void *) __u + 3); |
| 641 | break; |
| 642 | case 5: |
| 643 | __u->__ui = __src0_4; |
| 644 | __u = __extension__ ((void *) __u + 4); |
| 645 | __u->__uc = '\0'; |
| 646 | break; |
| 647 | case 6: |
| 648 | __u->__ui = __src0_4; |
| 649 | __u = __extension__ ((void *) __u + 4); |
| 650 | __u->__usi = __src4_2; |
| 651 | __u = __extension__ ((void *) __u + 1); |
| 652 | break; |
| 653 | case 7: |
| 654 | __u->__ui = __src0_4; |
| 655 | __u = __extension__ ((void *) __u + 4); |
| 656 | __u->__usi = __src4_2; |
| 657 | __u = __extension__ ((void *) __u + 2); |
| 658 | __u->__uc = '\0'; |
| 659 | break; |
| 660 | case 8: |
| 661 | __u->__ui = __src0_4; |
| 662 | __u = __extension__ ((void *) __u + 4); |
| 663 | __u->__ui = __src4_4; |
| 664 | __u = __extension__ ((void *) __u + 3); |
| 665 | break; |
| 666 | } |
| 667 | return &__u->__c; |
| 668 | } |
| 669 | # else |
| 670 | # ifndef _FORCE_INLINES |
| 671 | # define __stpcpy_args(src) \ |
| 672 | __extension__ ((__STRING2_COPY_ARR2) \ |
| 673 | { { ((__const char *) (src))[0], '\0' } }), \ |
| 674 | __extension__ ((__STRING2_COPY_ARR3) \ |
| 675 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 676 | '\0' } }), \ |
| 677 | __extension__ ((__STRING2_COPY_ARR4) \ |
| 678 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 679 | ((__const char *) (src))[2], '\0' } }), \ |
| 680 | __extension__ ((__STRING2_COPY_ARR5) \ |
| 681 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 682 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 683 | '\0' } }), \ |
| 684 | __extension__ ((__STRING2_COPY_ARR6) \ |
| 685 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 686 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 687 | ((__const char *) (src))[4], '\0' } }), \ |
| 688 | __extension__ ((__STRING2_COPY_ARR7) \ |
| 689 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 690 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 691 | ((__const char *) (src))[4], ((__const char *) (src))[5], \ |
| 692 | '\0' } }), \ |
| 693 | __extension__ ((__STRING2_COPY_ARR8) \ |
| 694 | { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ |
| 695 | ((__const char *) (src))[2], ((__const char *) (src))[3], \ |
| 696 | ((__const char *) (src))[4], ((__const char *) (src))[5], \ |
| 697 | ((__const char *) (src))[6], '\0' } }) |
| 698 | # endif |
| 699 | __STRING_INLINE char *__stpcpy_small (char *, __STRING2_COPY_ARR2, |
| 700 | __STRING2_COPY_ARR3, |
| 701 | __STRING2_COPY_ARR4, |
| 702 | __STRING2_COPY_ARR5, |
| 703 | __STRING2_COPY_ARR6, |
| 704 | __STRING2_COPY_ARR7, |
| 705 | __STRING2_COPY_ARR8, size_t); |
| 706 | __STRING_INLINE char * |
| 707 | __stpcpy_small (char *__dest, |
| 708 | __STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3, |
| 709 | __STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5, |
| 710 | __STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7, |
| 711 | __STRING2_COPY_ARR8 __src8, size_t __srclen) |
| 712 | { |
| 713 | union { |
| 714 | char __c; |
| 715 | __STRING2_COPY_ARR2 __sca2; |
| 716 | __STRING2_COPY_ARR3 __sca3; |
| 717 | __STRING2_COPY_ARR4 __sca4; |
| 718 | __STRING2_COPY_ARR5 __sca5; |
| 719 | __STRING2_COPY_ARR6 __sca6; |
| 720 | __STRING2_COPY_ARR7 __sca7; |
| 721 | __STRING2_COPY_ARR8 __sca8; |
| 722 | } *__u = (void *) __dest; |
| 723 | switch ((unsigned int) __srclen) |
| 724 | { |
| 725 | case 1: |
| 726 | __u->__c = '\0'; |
| 727 | break; |
| 728 | case 2: |
| 729 | __extension__ __u->__sca2 = __src2; |
| 730 | break; |
| 731 | case 3: |
| 732 | __extension__ __u->__sca3 = __src3; |
| 733 | break; |
| 734 | case 4: |
| 735 | __extension__ __u->__sca4 = __src4; |
| 736 | break; |
| 737 | case 5: |
| 738 | __extension__ __u->__sca5 = __src5; |
| 739 | break; |
| 740 | case 6: |
| 741 | __extension__ __u->__sca6 = __src6; |
| 742 | break; |
| 743 | case 7: |
| 744 | __extension__ __u->__sca7 = __src7; |
| 745 | break; |
| 746 | case 8: |
| 747 | __extension__ __u->__sca8 = __src8; |
| 748 | break; |
| 749 | } |
| 750 | return __dest + __srclen - 1; |
| 751 | } |
| 752 | # endif |
| 753 | # endif |
| 754 | # endif |
| 755 | #endif |
| 756 | |
| 757 | |
| 758 | /* Copy no more than N characters of SRC to DEST. */ |
| 759 | #ifndef _HAVE_STRING_ARCH_strncpy |
| 760 | # if __GNUC_PREREQ (3, 2) |
| 761 | # define strncpy(dest, src, n) __builtin_strncpy (dest, src, n) |
| 762 | # else |
| 763 | # define strncpy(dest, src, n) \ |
| 764 | (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ |
| 765 | ? (strlen (src) + 1 >= ((size_t) (n)) \ |
| 766 | ? (char *) memcpy (dest, src, n) \ |
| 767 | : strncpy (dest, src, n)) \ |
| 768 | : strncpy (dest, src, n))) |
| 769 | # endif |
| 770 | #endif |
| 771 | |
| 772 | |
| 773 | /* Append no more than N characters from SRC onto DEST. */ |
| 774 | #ifndef _HAVE_STRING_ARCH_strncat |
| 775 | # ifdef _USE_STRING_ARCH_strchr |
| 776 | # define strncat(dest, src, n) \ |
| 777 | (__extension__ ({ char *__dest = (dest); \ |
| 778 | __builtin_constant_p (src) && __builtin_constant_p (n) \ |
| 779 | ? (strlen (src) < ((size_t) (n)) \ |
| 780 | ? strcat (__dest, src) \ |
| 781 | : (*((char *) __mempcpy (strchr (__dest, '\0'), \ |
| 782 | src, n)) = '\0', __dest)) \ |
| 783 | : strncat (dest, src, n); })) |
| 784 | # elif __GNUC_PREREQ (3, 2) |
| 785 | # define strncat(dest, src, n) __builtin_strncat (dest, src, n) |
| 786 | # else |
| 787 | # define strncat(dest, src, n) \ |
| 788 | (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ |
| 789 | ? (strlen (src) < ((size_t) (n)) \ |
| 790 | ? strcat (dest, src) \ |
| 791 | : strncat (dest, src, n)) \ |
| 792 | : strncat (dest, src, n))) |
| 793 | # endif |
| 794 | #endif |
| 795 | |
| 796 | |
| 797 | /* Compare characters of S1 and S2. */ |
| 798 | #ifndef _HAVE_STRING_ARCH_strcmp |
| 799 | # if __GNUC_PREREQ (3, 2) |
| 800 | # define strcmp(s1, s2) \ |
| 801 | __extension__ \ |
| 802 | ({ size_t __s1_len, __s2_len; \ |
| 803 | (__builtin_constant_p (s1) && __builtin_constant_p (s2) \ |
| 804 | && (__s1_len = __builtin_strlen (s1), __s2_len = __builtin_strlen (s2), \ |
| 805 | (!__string2_1bptr_p (s1) || __s1_len >= 4) \ |
| 806 | && (!__string2_1bptr_p (s2) || __s2_len >= 4)) \ |
| 807 | ? __builtin_strcmp (s1, s2) \ |
| 808 | : (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ |
| 809 | && (__s1_len = __builtin_strlen (s1), __s1_len < 4) \ |
| 810 | ? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ |
| 811 | ? __builtin_strcmp (s1, s2) \ |
| 812 | : __strcmp_cg (s1, s2, __s1_len)) \ |
| 813 | : (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ |
| 814 | && (__s2_len = __builtin_strlen (s2), __s2_len < 4) \ |
| 815 | ? (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ |
| 816 | ? __builtin_strcmp (s1, s2) \ |
| 817 | : __strcmp_gc (s1, s2, __s2_len)) \ |
| 818 | : __builtin_strcmp (s1, s2)))); }) |
| 819 | # else |
| 820 | # define strcmp(s1, s2) \ |
| 821 | __extension__ \ |
| 822 | ({ size_t __s1_len, __s2_len; \ |
| 823 | (__builtin_constant_p (s1) && __builtin_constant_p (s2) \ |
| 824 | && (__s1_len = strlen (s1), __s2_len = strlen (s2), \ |
| 825 | (!__string2_1bptr_p (s1) || __s1_len >= 4) \ |
| 826 | && (!__string2_1bptr_p (s2) || __s2_len >= 4)) \ |
| 827 | ? memcmp ((__const char *) (s1), (__const char *) (s2), \ |
| 828 | (__s1_len < __s2_len ? __s1_len : __s2_len) + 1) \ |
| 829 | : (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ |
| 830 | && (__s1_len = strlen (s1), __s1_len < 4) \ |
| 831 | ? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ |
| 832 | ? __strcmp_cc (s1, s2, __s1_len) \ |
| 833 | : __strcmp_cg (s1, s2, __s1_len)) \ |
| 834 | : (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ |
| 835 | && (__s2_len = strlen (s2), __s2_len < 4) \ |
| 836 | ? (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ |
| 837 | ? __strcmp_cc (s1, s2, __s2_len) \ |
| 838 | : __strcmp_gc (s1, s2, __s2_len)) \ |
| 839 | : strcmp (s1, s2)))); }) |
| 840 | # endif |
| 841 | |
| 842 | # define __strcmp_cc(s1, s2, l) \ |
| 843 | (__extension__ ({ register int __result = \ |
| 844 | (((__const unsigned char *) (__const char *) (s1))[0] \ |
| 845 | - ((__const unsigned char *) (__const char *)(s2))[0]);\ |
| 846 | if (l > 0 && __result == 0) \ |
| 847 | { \ |
| 848 | __result = (((__const unsigned char *) \ |
| 849 | (__const char *) (s1))[1] \ |
| 850 | - ((__const unsigned char *) \ |
| 851 | (__const char *) (s2))[1]); \ |
| 852 | if (l > 1 && __result == 0) \ |
| 853 | { \ |
| 854 | __result = \ |
| 855 | (((__const unsigned char *) \ |
| 856 | (__const char *) (s1))[2] \ |
| 857 | - ((__const unsigned char *) \ |
| 858 | (__const char *) (s2))[2]); \ |
| 859 | if (l > 2 && __result == 0) \ |
| 860 | __result = \ |
| 861 | (((__const unsigned char *) \ |
| 862 | (__const char *) (s1))[3] \ |
| 863 | - ((__const unsigned char *) \ |
| 864 | (__const char *) (s2))[3]); \ |
| 865 | } \ |
| 866 | } \ |
| 867 | __result; })) |
| 868 | |
| 869 | # define __strcmp_cg(s1, s2, l1) \ |
| 870 | (__extension__ ({ __const unsigned char *__s2 = \ |
| 871 | (__const unsigned char *) (__const char *) (s2); \ |
| 872 | register int __result = \ |
| 873 | (((__const unsigned char *) (__const char *) (s1))[0] \ |
| 874 | - __s2[0]); \ |
| 875 | if (l1 > 0 && __result == 0) \ |
| 876 | { \ |
| 877 | __result = (((__const unsigned char *) \ |
| 878 | (__const char *) (s1))[1] - __s2[1]); \ |
| 879 | if (l1 > 1 && __result == 0) \ |
| 880 | { \ |
| 881 | __result = (((__const unsigned char *) \ |
| 882 | (__const char *) (s1))[2] - __s2[2]);\ |
| 883 | if (l1 > 2 && __result == 0) \ |
| 884 | __result = (((__const unsigned char *) \ |
| 885 | (__const char *) (s1))[3] \ |
| 886 | - __s2[3]); \ |
| 887 | } \ |
| 888 | } \ |
| 889 | __result; })) |
| 890 | |
| 891 | # define __strcmp_gc(s1, s2, l2) \ |
| 892 | (__extension__ ({ __const unsigned char *__s1 = \ |
| 893 | (__const unsigned char *) (__const char *) (s1); \ |
| 894 | register int __result = \ |
| 895 | __s1[0] - ((__const unsigned char *) \ |
| 896 | (__const char *) (s2))[0]; \ |
| 897 | if (l2 > 0 && __result == 0) \ |
| 898 | { \ |
| 899 | __result = (__s1[1] \ |
| 900 | - ((__const unsigned char *) \ |
| 901 | (__const char *) (s2))[1]); \ |
| 902 | if (l2 > 1 && __result == 0) \ |
| 903 | { \ |
| 904 | __result = \ |
| 905 | (__s1[2] - ((__const unsigned char *) \ |
| 906 | (__const char *) (s2))[2]); \ |
| 907 | if (l2 > 2 && __result == 0) \ |
| 908 | __result = \ |
| 909 | (__s1[3] \ |
| 910 | - ((__const unsigned char *) \ |
| 911 | (__const char *) (s2))[3]); \ |
| 912 | } \ |
| 913 | } \ |
| 914 | __result; })) |
| 915 | #endif |
| 916 | |
| 917 | |
| 918 | /* Compare N characters of S1 and S2. */ |
| 919 | #ifndef _HAVE_STRING_ARCH_strncmp |
| 920 | # define strncmp(s1, s2, n) \ |
| 921 | (__extension__ (__builtin_constant_p (n) \ |
| 922 | && ((__builtin_constant_p (s1) \ |
| 923 | && strlen (s1) < ((size_t) (n))) \ |
| 924 | || (__builtin_constant_p (s2) \ |
| 925 | && strlen (s2) < ((size_t) (n)))) \ |
| 926 | ? strcmp (s1, s2) : strncmp (s1, s2, n))) |
| 927 | #endif |
| 928 | |
| 929 | |
| 930 | /* Return the length of the initial segment of S which |
| 931 | consists entirely of characters not in REJECT. */ |
| 932 | #if !defined _HAVE_STRING_ARCH_strcspn || defined _FORCE_INLINES |
| 933 | # ifndef _HAVE_STRING_ARCH_strcspn |
| 934 | # if __GNUC_PREREQ (3, 2) |
| 935 | # define strcspn(s, reject) \ |
| 936 | __extension__ \ |
| 937 | ({ char __r0, __r1, __r2; \ |
| 938 | (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ |
| 939 | ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ |
| 940 | ? __builtin_strcspn (s, reject) \ |
| 941 | : ((__r0 = ((__const char *) (reject))[0], __r0 == '\0') \ |
| 942 | ? strlen (s) \ |
| 943 | : ((__r1 = ((__const char *) (reject))[1], __r1 == '\0') \ |
| 944 | ? __strcspn_c1 (s, __r0) \ |
| 945 | : ((__r2 = ((__const char *) (reject))[2], __r2 == '\0') \ |
| 946 | ? __strcspn_c2 (s, __r0, __r1) \ |
| 947 | : (((__const char *) (reject))[3] == '\0' \ |
| 948 | ? __strcspn_c3 (s, __r0, __r1, __r2) \ |
| 949 | : __builtin_strcspn (s, reject)))))) \ |
| 950 | : __builtin_strcspn (s, reject)); }) |
| 951 | # else |
| 952 | # define strcspn(s, reject) \ |
| 953 | __extension__ \ |
| 954 | ({ char __r0, __r1, __r2; \ |
| 955 | (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ |
| 956 | ? ((__r0 = ((__const char *) (reject))[0], __r0 == '\0') \ |
| 957 | ? strlen (s) \ |
| 958 | : ((__r1 = ((__const char *) (reject))[1], __r1 == '\0') \ |
| 959 | ? __strcspn_c1 (s, __r0) \ |
| 960 | : ((__r2 = ((__const char *) (reject))[2], __r2 == '\0') \ |
| 961 | ? __strcspn_c2 (s, __r0, __r1) \ |
| 962 | : (((__const char *) (reject))[3] == '\0' \ |
| 963 | ? __strcspn_c3 (s, __r0, __r1, __r2) \ |
| 964 | : strcspn (s, reject))))) \ |
| 965 | : strcspn (s, reject)); }) |
| 966 | # endif |
| 967 | # endif |
| 968 | |
| 969 | __STRING_INLINE size_t __strcspn_c1 (__const char *__s, int __reject); |
| 970 | __STRING_INLINE size_t |
| 971 | __strcspn_c1 (__const char *__s, int __reject) |
| 972 | { |
| 973 | register size_t __result = 0; |
| 974 | while (__s[__result] != '\0' && __s[__result] != __reject) |
| 975 | ++__result; |
| 976 | return __result; |
| 977 | } |
| 978 | |
| 979 | __STRING_INLINE size_t __strcspn_c2 (__const char *__s, int __reject1, |
| 980 | int __reject2); |
| 981 | __STRING_INLINE size_t |
| 982 | __strcspn_c2 (__const char *__s, int __reject1, int __reject2) |
| 983 | { |
| 984 | register size_t __result = 0; |
| 985 | while (__s[__result] != '\0' && __s[__result] != __reject1 |
| 986 | && __s[__result] != __reject2) |
| 987 | ++__result; |
| 988 | return __result; |
| 989 | } |
| 990 | |
| 991 | __STRING_INLINE size_t __strcspn_c3 (__const char *__s, int __reject1, |
| 992 | int __reject2, int __reject3); |
| 993 | __STRING_INLINE size_t |
| 994 | __strcspn_c3 (__const char *__s, int __reject1, int __reject2, |
| 995 | int __reject3) |
| 996 | { |
| 997 | register size_t __result = 0; |
| 998 | while (__s[__result] != '\0' && __s[__result] != __reject1 |
| 999 | && __s[__result] != __reject2 && __s[__result] != __reject3) |
| 1000 | ++__result; |
| 1001 | return __result; |
| 1002 | } |
| 1003 | #endif |
| 1004 | |
| 1005 | |
| 1006 | /* Return the length of the initial segment of S which |
| 1007 | consists entirely of characters in ACCEPT. */ |
| 1008 | #if !defined _HAVE_STRING_ARCH_strspn || defined _FORCE_INLINES |
| 1009 | # ifndef _HAVE_STRING_ARCH_strspn |
| 1010 | # if __GNUC_PREREQ (3, 2) |
| 1011 | # define strspn(s, accept) \ |
| 1012 | __extension__ \ |
| 1013 | ({ char __a0, __a1, __a2; \ |
| 1014 | (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ |
| 1015 | ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ |
| 1016 | ? __builtin_strspn (s, accept) \ |
| 1017 | : ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ |
| 1018 | ? ((void) (s), 0) \ |
| 1019 | : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ |
| 1020 | ? __strspn_c1 (s, __a0) \ |
| 1021 | : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ |
| 1022 | ? __strspn_c2 (s, __a0, __a1) \ |
| 1023 | : (((__const char *) (accept))[3] == '\0' \ |
| 1024 | ? __strspn_c3 (s, __a0, __a1, __a2) \ |
| 1025 | : __builtin_strspn (s, accept)))))) \ |
| 1026 | : __builtin_strspn (s, accept)); }) |
| 1027 | # else |
| 1028 | # define strspn(s, accept) \ |
| 1029 | __extension__ \ |
| 1030 | ({ char __a0, __a1, __a2; \ |
| 1031 | (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ |
| 1032 | ? ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ |
| 1033 | ? ((void) (s), 0) \ |
| 1034 | : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ |
| 1035 | ? __strspn_c1 (s, __a0) \ |
| 1036 | : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ |
| 1037 | ? __strspn_c2 (s, __a0, __a1) \ |
| 1038 | : (((__const char *) (accept))[3] == '\0' \ |
| 1039 | ? __strspn_c3 (s, __a0, __a1, __a2) \ |
| 1040 | : strspn (s, accept))))) \ |
| 1041 | : strspn (s, accept)); }) |
| 1042 | # endif |
| 1043 | # endif |
| 1044 | |
| 1045 | __STRING_INLINE size_t __strspn_c1 (__const char *__s, int __accept); |
| 1046 | __STRING_INLINE size_t |
| 1047 | __strspn_c1 (__const char *__s, int __accept) |
| 1048 | { |
| 1049 | register size_t __result = 0; |
| 1050 | /* Please note that __accept never can be '\0'. */ |
| 1051 | while (__s[__result] == __accept) |
| 1052 | ++__result; |
| 1053 | return __result; |
| 1054 | } |
| 1055 | |
| 1056 | __STRING_INLINE size_t __strspn_c2 (__const char *__s, int __accept1, |
| 1057 | int __accept2); |
| 1058 | __STRING_INLINE size_t |
| 1059 | __strspn_c2 (__const char *__s, int __accept1, int __accept2) |
| 1060 | { |
| 1061 | register size_t __result = 0; |
| 1062 | /* Please note that __accept1 and __accept2 never can be '\0'. */ |
| 1063 | while (__s[__result] == __accept1 || __s[__result] == __accept2) |
| 1064 | ++__result; |
| 1065 | return __result; |
| 1066 | } |
| 1067 | |
| 1068 | __STRING_INLINE size_t __strspn_c3 (__const char *__s, int __accept1, |
| 1069 | int __accept2, int __accept3); |
| 1070 | __STRING_INLINE size_t |
| 1071 | __strspn_c3 (__const char *__s, int __accept1, int __accept2, int __accept3) |
| 1072 | { |
| 1073 | register size_t __result = 0; |
| 1074 | /* Please note that __accept1 to __accept3 never can be '\0'. */ |
| 1075 | while (__s[__result] == __accept1 || __s[__result] == __accept2 |
| 1076 | || __s[__result] == __accept3) |
| 1077 | ++__result; |
| 1078 | return __result; |
| 1079 | } |
| 1080 | #endif |
| 1081 | |
| 1082 | |
| 1083 | /* Find the first occurrence in S of any character in ACCEPT. */ |
| 1084 | #if !defined _HAVE_STRING_ARCH_strpbrk || defined _FORCE_INLINES |
| 1085 | # ifndef _HAVE_STRING_ARCH_strpbrk |
| 1086 | # if __GNUC_PREREQ (3, 2) |
| 1087 | # define strpbrk(s, accept) \ |
| 1088 | __extension__ \ |
| 1089 | ({ char __a0, __a1, __a2; \ |
| 1090 | (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ |
| 1091 | ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ |
| 1092 | ? __builtin_strpbrk (s, accept) \ |
| 1093 | : ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ |
| 1094 | ? ((void) (s), (char *) NULL) \ |
| 1095 | : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ |
| 1096 | ? __builtin_strchr (s, __a0) \ |
| 1097 | : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ |
| 1098 | ? __strpbrk_c2 (s, __a0, __a1) \ |
| 1099 | : (((__const char *) (accept))[3] == '\0' \ |
| 1100 | ? __strpbrk_c3 (s, __a0, __a1, __a2) \ |
| 1101 | : __builtin_strpbrk (s, accept)))))) \ |
| 1102 | : __builtin_strpbrk (s, accept)); }) |
| 1103 | # else |
| 1104 | # define strpbrk(s, accept) \ |
| 1105 | __extension__ \ |
| 1106 | ({ char __a0, __a1, __a2; \ |
| 1107 | (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ |
| 1108 | ? ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ |
| 1109 | ? ((void) (s), (char *) NULL) \ |
| 1110 | : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ |
| 1111 | ? strchr (s, __a0) \ |
| 1112 | : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ |
| 1113 | ? __strpbrk_c2 (s, __a0, __a1) \ |
| 1114 | : (((__const char *) (accept))[3] == '\0' \ |
| 1115 | ? __strpbrk_c3 (s, __a0, __a1, __a2) \ |
| 1116 | : strpbrk (s, accept))))) \ |
| 1117 | : strpbrk (s, accept)); }) |
| 1118 | # endif |
| 1119 | # endif |
| 1120 | |
| 1121 | __STRING_INLINE char *__strpbrk_c2 (__const char *__s, int __accept1, |
| 1122 | int __accept2); |
| 1123 | __STRING_INLINE char * |
| 1124 | __strpbrk_c2 (__const char *__s, int __accept1, int __accept2) |
| 1125 | { |
| 1126 | /* Please note that __accept1 and __accept2 never can be '\0'. */ |
| 1127 | while (*__s != '\0' && *__s != __accept1 && *__s != __accept2) |
| 1128 | ++__s; |
| 1129 | return *__s == '\0' ? NULL : (char *) (size_t) __s; |
| 1130 | } |
| 1131 | |
| 1132 | __STRING_INLINE char *__strpbrk_c3 (__const char *__s, int __accept1, |
| 1133 | int __accept2, int __accept3); |
| 1134 | __STRING_INLINE char * |
| 1135 | __strpbrk_c3 (__const char *__s, int __accept1, int __accept2, |
| 1136 | int __accept3) |
| 1137 | { |
| 1138 | /* Please note that __accept1 to __accept3 never can be '\0'. */ |
| 1139 | while (*__s != '\0' && *__s != __accept1 && *__s != __accept2 |
| 1140 | && *__s != __accept3) |
| 1141 | ++__s; |
| 1142 | return *__s == '\0' ? NULL : (char *) (size_t) __s; |
| 1143 | } |
| 1144 | #endif |
| 1145 | |
| 1146 | |
| 1147 | /* Find the first occurrence of NEEDLE in HAYSTACK. Newer gcc versions |
| 1148 | do this itself. */ |
| 1149 | #if !defined _HAVE_STRING_ARCH_strstr && !__GNUC_PREREQ (2, 97) |
| 1150 | # define strstr(haystack, needle) \ |
| 1151 | (__extension__ (__builtin_constant_p (needle) && __string2_1bptr_p (needle) \ |
| 1152 | ? (((__const char *) (needle))[0] == '\0' \ |
| 1153 | ? (char *) (size_t) (haystack) \ |
| 1154 | : (((__const char *) (needle))[1] == '\0' \ |
| 1155 | ? strchr (haystack, \ |
| 1156 | ((__const char *) (needle))[0]) \ |
| 1157 | : strstr (haystack, needle))) \ |
| 1158 | : strstr (haystack, needle))) |
| 1159 | #endif |
| 1160 | |
| 1161 | |
| 1162 | #if !defined _HAVE_STRING_ARCH_strtok_r || defined _FORCE_INLINES |
| 1163 | # ifndef _HAVE_STRING_ARCH_strtok_r |
| 1164 | # define __strtok_r(s, sep, nextp) \ |
| 1165 | (__extension__ (__builtin_constant_p (sep) && __string2_1bptr_p (sep) \ |
| 1166 | && ((__const char *) (sep))[0] != '\0' \ |
| 1167 | && ((__const char *) (sep))[1] == '\0' \ |
| 1168 | ? __strtok_r_1c (s, ((__const char *) (sep))[0], nextp) \ |
| 1169 | : __strtok_r (s, sep, nextp))) |
| 1170 | # endif |
| 1171 | |
| 1172 | __STRING_INLINE char *__strtok_r_1c (char *__s, char __sep, char **__nextp); |
| 1173 | __STRING_INLINE char * |
| 1174 | __strtok_r_1c (char *__s, char __sep, char **__nextp) |
| 1175 | { |
| 1176 | char *__result; |
| 1177 | if (__s == NULL) |
| 1178 | __s = *__nextp; |
| 1179 | while (*__s == __sep) |
| 1180 | ++__s; |
| 1181 | __result = NULL; |
| 1182 | if (*__s != '\0') |
| 1183 | { |
| 1184 | __result = __s++; |
| 1185 | while (*__s != '\0') |
| 1186 | if (*__s++ == __sep) |
| 1187 | { |
| 1188 | __s[-1] = '\0'; |
| 1189 | break; |
| 1190 | } |
| 1191 | } |
| 1192 | *__nextp = __s; |
| 1193 | return __result; |
| 1194 | } |
| 1195 | # if defined __USE_POSIX || defined __USE_MISC |
| 1196 | # define strtok_r(s, sep, nextp) __strtok_r (s, sep, nextp) |
| 1197 | # endif |
| 1198 | #endif |
| 1199 | |
| 1200 | |
| 1201 | #if !defined _HAVE_STRING_ARCH_strsep || defined _FORCE_INLINES |
| 1202 | # ifndef _HAVE_STRING_ARCH_strsep |
| 1203 | |
| 1204 | extern char *__strsep_g (char **__stringp, __const char *__delim); |
| 1205 | # define __strsep(s, reject) \ |
| 1206 | __extension__ \ |
| 1207 | ({ char __r0, __r1, __r2; \ |
| 1208 | (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ |
| 1209 | && (__r0 = ((__const char *) (reject))[0], \ |
| 1210 | ((__const char *) (reject))[0] != '\0') \ |
| 1211 | ? ((__r1 = ((__const char *) (reject))[1], \ |
| 1212 | ((__const char *) (reject))[1] == '\0') \ |
| 1213 | ? __strsep_1c (s, __r0) \ |
| 1214 | : ((__r2 = ((__const char *) (reject))[2], __r2 == '\0') \ |
| 1215 | ? __strsep_2c (s, __r0, __r1) \ |
| 1216 | : (((__const char *) (reject))[3] == '\0' \ |
| 1217 | ? __strsep_3c (s, __r0, __r1, __r2) \ |
| 1218 | : __strsep_g (s, reject)))) \ |
| 1219 | : __strsep_g (s, reject)); }) |
| 1220 | # endif |
| 1221 | |
| 1222 | __STRING_INLINE char *__strsep_1c (char **__s, char __reject); |
| 1223 | __STRING_INLINE char * |
| 1224 | __strsep_1c (char **__s, char __reject) |
| 1225 | { |
| 1226 | register char *__retval = *__s; |
| 1227 | if (__retval != NULL && (*__s = strchr (__retval, __reject)) != NULL) |
| 1228 | *(*__s)++ = '\0'; |
| 1229 | return __retval; |
| 1230 | } |
| 1231 | |
| 1232 | __STRING_INLINE char *__strsep_2c (char **__s, char __reject1, char __reject2); |
| 1233 | __STRING_INLINE char * |
| 1234 | __strsep_2c (char **__s, char __reject1, char __reject2) |
| 1235 | { |
| 1236 | register char *__retval = *__s; |
| 1237 | if (__retval != NULL) |
| 1238 | { |
| 1239 | register char *__cp = __retval; |
| 1240 | while (1) |
| 1241 | { |
| 1242 | if (*__cp == '\0') |
| 1243 | { |
| 1244 | __cp = NULL; |
| 1245 | break; |
| 1246 | } |
| 1247 | if (*__cp == __reject1 || *__cp == __reject2) |
| 1248 | { |
| 1249 | *__cp++ = '\0'; |
| 1250 | break; |
| 1251 | } |
| 1252 | ++__cp; |
| 1253 | } |
| 1254 | *__s = __cp; |
| 1255 | } |
| 1256 | return __retval; |
| 1257 | } |
| 1258 | |
| 1259 | __STRING_INLINE char *__strsep_3c (char **__s, char __reject1, char __reject2, |
| 1260 | char __reject3); |
| 1261 | __STRING_INLINE char * |
| 1262 | __strsep_3c (char **__s, char __reject1, char __reject2, char __reject3) |
| 1263 | { |
| 1264 | register char *__retval = *__s; |
| 1265 | if (__retval != NULL) |
| 1266 | { |
| 1267 | register char *__cp = __retval; |
| 1268 | while (1) |
| 1269 | { |
| 1270 | if (*__cp == '\0') |
| 1271 | { |
| 1272 | __cp = NULL; |
| 1273 | break; |
| 1274 | } |
| 1275 | if (*__cp == __reject1 || *__cp == __reject2 || *__cp == __reject3) |
| 1276 | { |
| 1277 | *__cp++ = '\0'; |
| 1278 | break; |
| 1279 | } |
| 1280 | ++__cp; |
| 1281 | } |
| 1282 | *__s = __cp; |
| 1283 | } |
| 1284 | return __retval; |
| 1285 | } |
| 1286 | # ifdef __USE_BSD |
| 1287 | # define strsep(s, reject) __strsep (s, reject) |
| 1288 | # endif |
| 1289 | #endif |
| 1290 | |
| 1291 | /* We need the memory allocation functions for inline strdup(). |
| 1292 | Referring to stdlib.h (even minimally) is not allowed |
| 1293 | in any of the tight standards compliant modes. */ |
| 1294 | #ifdef __USE_MISC |
| 1295 | |
| 1296 | # if !defined _HAVE_STRING_ARCH_strdup || !defined _HAVE_STRING_ARCH_strndup |
| 1297 | # define __need_malloc_and_calloc |
| 1298 | # include <stdlib.h> |
| 1299 | # endif |
| 1300 | |
| 1301 | # ifndef _HAVE_STRING_ARCH_strdup |
| 1302 | |
| 1303 | extern char *__strdup (__const char *__string) __THROW __attribute_malloc__; |
| 1304 | # define __strdup(s) \ |
| 1305 | (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \ |
| 1306 | ? (((__const char *) (s))[0] == '\0' \ |
| 1307 | ? (char *) calloc ((size_t) 1, (size_t) 1) \ |
| 1308 | : ({ size_t __len = strlen (s) + 1; \ |
| 1309 | char *__retval = (char *) malloc (__len); \ |
| 1310 | if (__retval != NULL) \ |
| 1311 | __retval = (char *) memcpy (__retval, s, __len); \ |
| 1312 | __retval; })) \ |
| 1313 | : __strdup (s))) |
| 1314 | |
| 1315 | # if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED |
| 1316 | # define strdup(s) __strdup (s) |
| 1317 | # endif |
| 1318 | # endif |
| 1319 | |
| 1320 | # ifndef _HAVE_STRING_ARCH_strndup |
| 1321 | |
| 1322 | extern char *__strndup (__const char *__string, size_t __n) |
| 1323 | __THROW __attribute_malloc__; |
| 1324 | # define __strndup(s, n) \ |
| 1325 | (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \ |
| 1326 | ? (((__const char *) (s))[0] == '\0' \ |
| 1327 | ? (char *) calloc ((size_t) 1, (size_t) 1) \ |
| 1328 | : ({ size_t __len = strlen (s) + 1; \ |
| 1329 | size_t __n = (n); \ |
| 1330 | char *__retval; \ |
| 1331 | if (__n < __len) \ |
| 1332 | __len = __n + 1; \ |
| 1333 | __retval = (char *) malloc (__len); \ |
| 1334 | if (__retval != NULL) \ |
| 1335 | { \ |
| 1336 | __retval[__len - 1] = '\0'; \ |
| 1337 | __retval = (char *) memcpy (__retval, s, \ |
| 1338 | __len - 1); \ |
| 1339 | } \ |
| 1340 | __retval; })) \ |
| 1341 | : __strndup (s, n))) |
| 1342 | |
| 1343 | # ifdef __USE_GNU |
| 1344 | # define strndup(s, n) __strndup (s, n) |
| 1345 | # endif |
| 1346 | # endif |
| 1347 | |
| 1348 | #endif /* Use misc. or use GNU. */ |
| 1349 | |
| 1350 | #ifndef _FORCE_INLINES |
| 1351 | # undef __STRING_INLINE |
| 1352 | #endif |
| 1353 | |
| 1354 | #endif /* No string inlines. */ |