Edit File: string2.h
/* Machine-independant string function optimizations. Copyright (C) 1997-2003, 2004, 2007, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _STRING_H # error "Never use <bits/string2.h> directly; include <string.h> instead." #endif #if !defined __NO_STRING_INLINES && !defined __BOUNDED_POINTERS__ /* Unlike the definitions in the header <bits/string.h> the definitions contained here are not optimized down to assembler level. Those optimizations are not always a good idea since this means the code size increases a lot. Instead the definitions here optimize some functions in a way which do not dramatically increase the code size and which do not use assembler. The main trick is to use GCC's `__builtin_constant_p' function. Every function XXX which has a defined version in <bits/string.h> must be accompanied by a symbol _HAVE_STRING_ARCH_XXX to make sure we don't get redefinitions. We must use here macros instead of inline functions since the trick won't work with the latter. */ #ifndef __STRING_INLINE # ifdef __cplusplus # define __STRING_INLINE inline # else # define __STRING_INLINE __extern_inline # endif #endif #if _STRING_ARCH_unaligned /* If we can do unaligned memory accesses we must know the endianess. */ # include <endian.h> # include <bits/types.h> # if __BYTE_ORDER == __LITTLE_ENDIAN # define __STRING2_SMALL_GET16(src, idx) \ (((__const unsigned char *) (__const char *) (src))[idx + 1] << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx]) # define __STRING2_SMALL_GET32(src, idx) \ (((((__const unsigned char *) (__const char *) (src))[idx + 3] << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx + 2]) << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx + 1]) << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx]) # else # define __STRING2_SMALL_GET16(src, idx) \ (((__const unsigned char *) (__const char *) (src))[idx] << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx + 1]) # define __STRING2_SMALL_GET32(src, idx) \ (((((__const unsigned char *) (__const char *) (src))[idx] << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx + 1]) << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx + 2]) << 8 \ | ((__const unsigned char *) (__const char *) (src))[idx + 3]) # endif #else /* These are a few types we need for the optimizations if we cannot use unaligned memory accesses. */ # define __STRING2_COPY_TYPE(N) \ typedef struct { unsigned char __arr[N]; } \ __attribute__ ((__packed__)) __STRING2_COPY_ARR##N __STRING2_COPY_TYPE (2); __STRING2_COPY_TYPE (3); __STRING2_COPY_TYPE (4); __STRING2_COPY_TYPE (5); __STRING2_COPY_TYPE (6); __STRING2_COPY_TYPE (7); __STRING2_COPY_TYPE (8); # undef __STRING2_COPY_TYPE #endif /* Dereferencing a pointer arg to run sizeof on it fails for the void pointer case, so we use this instead. Note that __x is evaluated twice. */ #define __string2_1bptr_p(__x) \ ((size_t)(const void *)((__x) + 1) - (size_t)(const void *)(__x) == 1) /* Set N bytes of S to C. */ #if !defined _HAVE_STRING_ARCH_memset # if !__GNUC_PREREQ (3, 0) # if _STRING_ARCH_unaligned # define memset(s, c, n) \ (__extension__ (__builtin_constant_p (n) && (n) <= 16 \ ? ((n) == 1 \ ? __memset_1 (s, c) \ : __memset_gc (s, c, n)) \ : (__builtin_constant_p (c) && (c) == '\0' \ ? ({ void *__s = (s); __bzero (__s, n); __s; }) \ : memset (s, c, n)))) # define __memset_1(s, c) ({ void *__s = (s); \ *((__uint8_t *) __s) = (__uint8_t) c; __s; }) # define __memset_gc(s, c, n) \ ({ void *__s = (s); \ union { \ unsigned int __ui; \ unsigned short int __usi; \ unsigned char __uc; \ } *__u = __s; \ __uint8_t __c = (__uint8_t) (c); \ \ /* This `switch' statement will be removed at compile-time. */ \ switch ((unsigned int) (n)) \ { \ case 15: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 11: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 7: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 3: \ __u->__usi = (unsigned short int) __c * 0x0101; \ __u = __extension__ ((void *) __u + 2); \ __u->__uc = (unsigned char) __c; \ break; \ \ case 14: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 10: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 6: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 2: \ __u->__usi = (unsigned short int) __c * 0x0101; \ break; \ \ case 13: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 9: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 5: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 1: \ __u->__uc = (unsigned char) __c; \ break; \ \ case 16: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 12: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 8: \ __u->__ui = __c * 0x01010101; \ __u = __extension__ ((void *) __u + 4); \ case 4: \ __u->__ui = __c * 0x01010101; \ case 0: \ break; \ } \ \ __s; }) # else # define memset(s, c, n) \ (__extension__ (__builtin_constant_p (c) && (c) == '\0' \ ? ({ void *__s = (s); __bzero (__s, n); __s; }) \ : memset (s, c, n))) # endif # endif /* GCC < 3.0 optimizes memset(s, 0, n) but not bzero(s, n). The optimization is broken before EGCS 1.1. GCC 3.0+ has __builtin_bzero as well, but at least till GCC 3.4 if it decides to call the library function, it calls memset and not bzero. */ # if __GNUC_PREREQ (2, 91) # define __bzero(s, n) __builtin_memset (s, '\0', n) # endif #endif /* Copy N bytes from SRC to DEST, returning pointer to byte following the last copied. */ #ifdef __USE_GNU # if !defined _HAVE_STRING_ARCH_mempcpy || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_mempcpy # if __GNUC_PREREQ (3, 4) # define __mempcpy(dest, src, n) __builtin_mempcpy (dest, src, n) # elif __GNUC_PREREQ (3, 0) # define __mempcpy(dest, src, n) \ (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ && __string2_1bptr_p (src) && n <= 8 \ ? __builtin_memcpy (dest, src, n) + (n) \ : __mempcpy (dest, src, n))) # else # define __mempcpy(dest, src, n) \ (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ && __string2_1bptr_p (src) && n <= 8 \ ? __mempcpy_small (dest, __mempcpy_args (src), n) \ : __mempcpy (dest, src, n))) # endif /* In glibc we use this function frequently but for namespace reasons we have to use the name `__mempcpy'. */ # define mempcpy(dest, src, n) __mempcpy (dest, src, n) # endif # if !__GNUC_PREREQ (3, 0) || defined _FORCE_INLINES # if _STRING_ARCH_unaligned # ifndef _FORCE_INLINES # define __mempcpy_args(src) \ ((__const char *) (src))[0], ((__const char *) (src))[2], \ ((__const char *) (src))[4], ((__const char *) (src))[6], \ __extension__ __STRING2_SMALL_GET16 (src, 0), \ __extension__ __STRING2_SMALL_GET16 (src, 4), \ __extension__ __STRING2_SMALL_GET32 (src, 0), \ __extension__ __STRING2_SMALL_GET32 (src, 4) # endif __STRING_INLINE void *__mempcpy_small (void *, char, char, char, char, __uint16_t, __uint16_t, __uint32_t, __uint32_t, size_t); __STRING_INLINE void * __mempcpy_small (void *__dest1, char __src0_1, char __src2_1, char __src4_1, char __src6_1, __uint16_t __src0_2, __uint16_t __src4_2, __uint32_t __src0_4, __uint32_t __src4_4, size_t __srclen) { union { __uint32_t __ui; __uint16_t __usi; unsigned char __uc; unsigned char __c; } *__u = __dest1; switch ((unsigned int) __srclen) { case 1: __u->__c = __src0_1; __u = __extension__ ((void *) __u + 1); break; case 2: __u->__usi = __src0_2; __u = __extension__ ((void *) __u + 2); break; case 3: __u->__usi = __src0_2; __u = __extension__ ((void *) __u + 2); __u->__c = __src2_1; __u = __extension__ ((void *) __u + 1); break; case 4: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); break; case 5: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__c = __src4_1; __u = __extension__ ((void *) __u + 1); break; case 6: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__usi = __src4_2; __u = __extension__ ((void *) __u + 2); break; case 7: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__usi = __src4_2; __u = __extension__ ((void *) __u + 2); __u->__c = __src6_1; __u = __extension__ ((void *) __u + 1); break; case 8: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__ui = __src4_4; __u = __extension__ ((void *) __u + 4); break; } return (void *) __u; } # else # ifndef _FORCE_INLINES # define __mempcpy_args(src) \ ((__const char *) (src))[0], \ __extension__ ((__STRING2_COPY_ARR2) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1] } }), \ __extension__ ((__STRING2_COPY_ARR3) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2] } }), \ __extension__ ((__STRING2_COPY_ARR4) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3] } }), \ __extension__ ((__STRING2_COPY_ARR5) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4] } }), \ __extension__ ((__STRING2_COPY_ARR6) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5] } }), \ __extension__ ((__STRING2_COPY_ARR7) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5], \ ((__const char *) (src))[6] } }), \ __extension__ ((__STRING2_COPY_ARR8) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5], \ ((__const char *) (src))[6], ((__const char *) (src))[7] } }) # endif __STRING_INLINE void *__mempcpy_small (void *, char, __STRING2_COPY_ARR2, __STRING2_COPY_ARR3, __STRING2_COPY_ARR4, __STRING2_COPY_ARR5, __STRING2_COPY_ARR6, __STRING2_COPY_ARR7, __STRING2_COPY_ARR8, size_t); __STRING_INLINE void * __mempcpy_small (void *__dest, char __src1, __STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3, __STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5, __STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7, __STRING2_COPY_ARR8 __src8, size_t __srclen) { union { char __c; __STRING2_COPY_ARR2 __sca2; __STRING2_COPY_ARR3 __sca3; __STRING2_COPY_ARR4 __sca4; __STRING2_COPY_ARR5 __sca5; __STRING2_COPY_ARR6 __sca6; __STRING2_COPY_ARR7 __sca7; __STRING2_COPY_ARR8 __sca8; } *__u = __dest; switch ((unsigned int) __srclen) { case 1: __u->__c = __src1; break; case 2: __extension__ __u->__sca2 = __src2; break; case 3: __extension__ __u->__sca3 = __src3; break; case 4: __extension__ __u->__sca4 = __src4; break; case 5: __extension__ __u->__sca5 = __src5; break; case 6: __extension__ __u->__sca6 = __src6; break; case 7: __extension__ __u->__sca7 = __src7; break; case 8: __extension__ __u->__sca8 = __src8; break; } return __extension__ ((void *) __u + __srclen); } # endif # endif # endif #endif /* Return pointer to C in S. */ #ifndef _HAVE_STRING_ARCH_strchr extern void *__rawmemchr (const void *__s, int __c); # if __GNUC_PREREQ (3, 2) # define strchr(s, c) \ (__extension__ (__builtin_constant_p (c) && !__builtin_constant_p (s) \ && (c) == '\0' \ ? (char *) __rawmemchr (s, c) \ : __builtin_strchr (s, c))) # else # define strchr(s, c) \ (__extension__ (__builtin_constant_p (c) && (c) == '\0' \ ? (char *) __rawmemchr (s, c) \ : strchr (s, c))) # endif #endif /* Copy SRC to DEST. */ #if (!defined _HAVE_STRING_ARCH_strcpy && !__GNUC_PREREQ (3, 0)) \ || defined _FORCE_INLINES # if !defined _HAVE_STRING_ARCH_strcpy && !__GNUC_PREREQ (3, 0) # define strcpy(dest, src) \ (__extension__ (__builtin_constant_p (src) \ ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ ? __strcpy_small (dest, __strcpy_args (src), \ strlen (src) + 1) \ : (char *) memcpy (dest, src, strlen (src) + 1)) \ : strcpy (dest, src))) # endif # if _STRING_ARCH_unaligned # ifndef _FORCE_INLINES # define __strcpy_args(src) \ __extension__ __STRING2_SMALL_GET16 (src, 0), \ __extension__ __STRING2_SMALL_GET16 (src, 4), \ __extension__ __STRING2_SMALL_GET32 (src, 0), \ __extension__ __STRING2_SMALL_GET32 (src, 4) # endif __STRING_INLINE char *__strcpy_small (char *, __uint16_t, __uint16_t, __uint32_t, __uint32_t, size_t); __STRING_INLINE char * __strcpy_small (char *__dest, __uint16_t __src0_2, __uint16_t __src4_2, __uint32_t __src0_4, __uint32_t __src4_4, size_t __srclen) { union { __uint32_t __ui; __uint16_t __usi; unsigned char __uc; } *__u = (void *) __dest; switch ((unsigned int) __srclen) { case 1: __u->__uc = '\0'; break; case 2: __u->__usi = __src0_2; break; case 3: __u->__usi = __src0_2; __u = __extension__ ((void *) __u + 2); __u->__uc = '\0'; break; case 4: __u->__ui = __src0_4; break; case 5: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__uc = '\0'; break; case 6: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__usi = __src4_2; break; case 7: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__usi = __src4_2; __u = __extension__ ((void *) __u + 2); __u->__uc = '\0'; break; case 8: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__ui = __src4_4; break; } return __dest; } # else # ifndef _FORCE_INLINES # define __strcpy_args(src) \ __extension__ ((__STRING2_COPY_ARR2) \ { { ((__const char *) (src))[0], '\0' } }), \ __extension__ ((__STRING2_COPY_ARR3) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ '\0' } }), \ __extension__ ((__STRING2_COPY_ARR4) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], '\0' } }), \ __extension__ ((__STRING2_COPY_ARR5) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ '\0' } }), \ __extension__ ((__STRING2_COPY_ARR6) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], '\0' } }), \ __extension__ ((__STRING2_COPY_ARR7) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5], \ '\0' } }), \ __extension__ ((__STRING2_COPY_ARR8) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5], \ ((__const char *) (src))[6], '\0' } }) # endif __STRING_INLINE char *__strcpy_small (char *, __STRING2_COPY_ARR2, __STRING2_COPY_ARR3, __STRING2_COPY_ARR4, __STRING2_COPY_ARR5, __STRING2_COPY_ARR6, __STRING2_COPY_ARR7, __STRING2_COPY_ARR8, size_t); __STRING_INLINE char * __strcpy_small (char *__dest, __STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3, __STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5, __STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7, __STRING2_COPY_ARR8 __src8, size_t __srclen) { union { char __c; __STRING2_COPY_ARR2 __sca2; __STRING2_COPY_ARR3 __sca3; __STRING2_COPY_ARR4 __sca4; __STRING2_COPY_ARR5 __sca5; __STRING2_COPY_ARR6 __sca6; __STRING2_COPY_ARR7 __sca7; __STRING2_COPY_ARR8 __sca8; } *__u = (void *) __dest; switch ((unsigned int) __srclen) { case 1: __u->__c = '\0'; break; case 2: __extension__ __u->__sca2 = __src2; break; case 3: __extension__ __u->__sca3 = __src3; break; case 4: __extension__ __u->__sca4 = __src4; break; case 5: __extension__ __u->__sca5 = __src5; break; case 6: __extension__ __u->__sca6 = __src6; break; case 7: __extension__ __u->__sca7 = __src7; break; case 8: __extension__ __u->__sca8 = __src8; break; } return __dest; } # endif #endif /* Copy SRC to DEST, returning pointer to final NUL byte. */ #ifdef __USE_GNU # if !defined _HAVE_STRING_ARCH_stpcpy || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_stpcpy # if __GNUC_PREREQ (3, 4) # define __stpcpy(dest, src) __builtin_stpcpy (dest, src) # elif __GNUC_PREREQ (3, 0) # define __stpcpy(dest, src) \ (__extension__ (__builtin_constant_p (src) \ ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ ? __builtin_strcpy (dest, src) + strlen (src) \ : ((char *) (__mempcpy) (dest, src, strlen (src) + 1) \ - 1)) \ : __stpcpy (dest, src))) # else # define __stpcpy(dest, src) \ (__extension__ (__builtin_constant_p (src) \ ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ ? __stpcpy_small (dest, __stpcpy_args (src), \ strlen (src) + 1) \ : ((char *) (__mempcpy) (dest, src, strlen (src) + 1) \ - 1)) \ : __stpcpy (dest, src))) # endif /* In glibc we use this function frequently but for namespace reasons we have to use the name `__stpcpy'. */ # define stpcpy(dest, src) __stpcpy (dest, src) # endif # if !__GNUC_PREREQ (3, 0) || defined _FORCE_INLINES # if _STRING_ARCH_unaligned # ifndef _FORCE_INLINES # define __stpcpy_args(src) \ __extension__ __STRING2_SMALL_GET16 (src, 0), \ __extension__ __STRING2_SMALL_GET16 (src, 4), \ __extension__ __STRING2_SMALL_GET32 (src, 0), \ __extension__ __STRING2_SMALL_GET32 (src, 4) # endif __STRING_INLINE char *__stpcpy_small (char *, __uint16_t, __uint16_t, __uint32_t, __uint32_t, size_t); __STRING_INLINE char * __stpcpy_small (char *__dest, __uint16_t __src0_2, __uint16_t __src4_2, __uint32_t __src0_4, __uint32_t __src4_4, size_t __srclen) { union { unsigned int __ui; unsigned short int __usi; unsigned char __uc; char __c; } *__u = (void *) __dest; switch ((unsigned int) __srclen) { case 1: __u->__uc = '\0'; break; case 2: __u->__usi = __src0_2; __u = __extension__ ((void *) __u + 1); break; case 3: __u->__usi = __src0_2; __u = __extension__ ((void *) __u + 2); __u->__uc = '\0'; break; case 4: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 3); break; case 5: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__uc = '\0'; break; case 6: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__usi = __src4_2; __u = __extension__ ((void *) __u + 1); break; case 7: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__usi = __src4_2; __u = __extension__ ((void *) __u + 2); __u->__uc = '\0'; break; case 8: __u->__ui = __src0_4; __u = __extension__ ((void *) __u + 4); __u->__ui = __src4_4; __u = __extension__ ((void *) __u + 3); break; } return &__u->__c; } # else # ifndef _FORCE_INLINES # define __stpcpy_args(src) \ __extension__ ((__STRING2_COPY_ARR2) \ { { ((__const char *) (src))[0], '\0' } }), \ __extension__ ((__STRING2_COPY_ARR3) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ '\0' } }), \ __extension__ ((__STRING2_COPY_ARR4) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], '\0' } }), \ __extension__ ((__STRING2_COPY_ARR5) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ '\0' } }), \ __extension__ ((__STRING2_COPY_ARR6) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], '\0' } }), \ __extension__ ((__STRING2_COPY_ARR7) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5], \ '\0' } }), \ __extension__ ((__STRING2_COPY_ARR8) \ { { ((__const char *) (src))[0], ((__const char *) (src))[1], \ ((__const char *) (src))[2], ((__const char *) (src))[3], \ ((__const char *) (src))[4], ((__const char *) (src))[5], \ ((__const char *) (src))[6], '\0' } }) # endif __STRING_INLINE char *__stpcpy_small (char *, __STRING2_COPY_ARR2, __STRING2_COPY_ARR3, __STRING2_COPY_ARR4, __STRING2_COPY_ARR5, __STRING2_COPY_ARR6, __STRING2_COPY_ARR7, __STRING2_COPY_ARR8, size_t); __STRING_INLINE char * __stpcpy_small (char *__dest, __STRING2_COPY_ARR2 __src2, __STRING2_COPY_ARR3 __src3, __STRING2_COPY_ARR4 __src4, __STRING2_COPY_ARR5 __src5, __STRING2_COPY_ARR6 __src6, __STRING2_COPY_ARR7 __src7, __STRING2_COPY_ARR8 __src8, size_t __srclen) { union { char __c; __STRING2_COPY_ARR2 __sca2; __STRING2_COPY_ARR3 __sca3; __STRING2_COPY_ARR4 __sca4; __STRING2_COPY_ARR5 __sca5; __STRING2_COPY_ARR6 __sca6; __STRING2_COPY_ARR7 __sca7; __STRING2_COPY_ARR8 __sca8; } *__u = (void *) __dest; switch ((unsigned int) __srclen) { case 1: __u->__c = '\0'; break; case 2: __extension__ __u->__sca2 = __src2; break; case 3: __extension__ __u->__sca3 = __src3; break; case 4: __extension__ __u->__sca4 = __src4; break; case 5: __extension__ __u->__sca5 = __src5; break; case 6: __extension__ __u->__sca6 = __src6; break; case 7: __extension__ __u->__sca7 = __src7; break; case 8: __extension__ __u->__sca8 = __src8; break; } return __dest + __srclen - 1; } # endif # endif # endif #endif /* Copy no more than N characters of SRC to DEST. */ #ifndef _HAVE_STRING_ARCH_strncpy # if __GNUC_PREREQ (3, 2) # define strncpy(dest, src, n) __builtin_strncpy (dest, src, n) # else # define strncpy(dest, src, n) \ (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ ? (strlen (src) + 1 >= ((size_t) (n)) \ ? (char *) memcpy (dest, src, n) \ : strncpy (dest, src, n)) \ : strncpy (dest, src, n))) # endif #endif /* Append no more than N characters from SRC onto DEST. */ #ifndef _HAVE_STRING_ARCH_strncat # ifdef _USE_STRING_ARCH_strchr # define strncat(dest, src, n) \ (__extension__ ({ char *__dest = (dest); \ __builtin_constant_p (src) && __builtin_constant_p (n) \ ? (strlen (src) < ((size_t) (n)) \ ? strcat (__dest, src) \ : (*((char *) __mempcpy (strchr (__dest, '\0'), \ src, n)) = '\0', __dest)) \ : strncat (dest, src, n); })) # elif __GNUC_PREREQ (3, 2) # define strncat(dest, src, n) __builtin_strncat (dest, src, n) # else # define strncat(dest, src, n) \ (__extension__ (__builtin_constant_p (src) && __builtin_constant_p (n) \ ? (strlen (src) < ((size_t) (n)) \ ? strcat (dest, src) \ : strncat (dest, src, n)) \ : strncat (dest, src, n))) # endif #endif /* Compare characters of S1 and S2. */ #ifndef _HAVE_STRING_ARCH_strcmp # if __GNUC_PREREQ (3, 2) # define strcmp(s1, s2) \ __extension__ \ ({ size_t __s1_len, __s2_len; \ (__builtin_constant_p (s1) && __builtin_constant_p (s2) \ && (__s1_len = strlen (s1), __s2_len = strlen (s2), \ (!__string2_1bptr_p (s1) || __s1_len >= 4) \ && (!__string2_1bptr_p (s2) || __s2_len >= 4)) \ ? __builtin_strcmp (s1, s2) \ : (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ && (__s1_len = strlen (s1), __s1_len < 4) \ ? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ ? __builtin_strcmp (s1, s2) \ : __strcmp_cg (s1, s2, __s1_len)) \ : (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ && (__s2_len = strlen (s2), __s2_len < 4) \ ? (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ ? __builtin_strcmp (s1, s2) \ : __strcmp_gc (s1, s2, __s2_len)) \ : __builtin_strcmp (s1, s2)))); }) # else # define strcmp(s1, s2) \ __extension__ \ ({ size_t __s1_len, __s2_len; \ (__builtin_constant_p (s1) && __builtin_constant_p (s2) \ && (__s1_len = strlen (s1), __s2_len = strlen (s2), \ (!__string2_1bptr_p (s1) || __s1_len >= 4) \ && (!__string2_1bptr_p (s2) || __s2_len >= 4)) \ ? memcmp ((__const char *) (s1), (__const char *) (s2), \ (__s1_len < __s2_len ? __s1_len : __s2_len) + 1) \ : (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ && (__s1_len = strlen (s1), __s1_len < 4) \ ? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ ? __strcmp_cc (s1, s2, __s1_len) \ : __strcmp_cg (s1, s2, __s1_len)) \ : (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \ && (__s2_len = strlen (s2), __s2_len < 4) \ ? (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \ ? __strcmp_cc (s1, s2, __s2_len) \ : __strcmp_gc (s1, s2, __s2_len)) \ : strcmp (s1, s2)))); }) # endif # define __strcmp_cc(s1, s2, l) \ (__extension__ ({ register int __result = \ (((__const unsigned char *) (__const char *) (s1))[0] \ - ((__const unsigned char *) (__const char *)(s2))[0]);\ if (l > 0 && __result == 0) \ { \ __result = (((__const unsigned char *) \ (__const char *) (s1))[1] \ - ((__const unsigned char *) \ (__const char *) (s2))[1]); \ if (l > 1 && __result == 0) \ { \ __result = \ (((__const unsigned char *) \ (__const char *) (s1))[2] \ - ((__const unsigned char *) \ (__const char *) (s2))[2]); \ if (l > 2 && __result == 0) \ __result = \ (((__const unsigned char *) \ (__const char *) (s1))[3] \ - ((__const unsigned char *) \ (__const char *) (s2))[3]); \ } \ } \ __result; })) # define __strcmp_cg(s1, s2, l1) \ (__extension__ ({ __const unsigned char *__s2 = \ (__const unsigned char *) (__const char *) (s2); \ register int __result = \ (((__const unsigned char *) (__const char *) (s1))[0] \ - __s2[0]); \ if (l1 > 0 && __result == 0) \ { \ __result = (((__const unsigned char *) \ (__const char *) (s1))[1] - __s2[1]); \ if (l1 > 1 && __result == 0) \ { \ __result = (((__const unsigned char *) \ (__const char *) (s1))[2] - __s2[2]);\ if (l1 > 2 && __result == 0) \ __result = (((__const unsigned char *) \ (__const char *) (s1))[3] \ - __s2[3]); \ } \ } \ __result; })) # define __strcmp_gc(s1, s2, l2) \ (__extension__ ({ __const unsigned char *__s1 = \ (__const unsigned char *) (__const char *) (s1); \ register int __result = \ __s1[0] - ((__const unsigned char *) \ (__const char *) (s2))[0]; \ if (l2 > 0 && __result == 0) \ { \ __result = (__s1[1] \ - ((__const unsigned char *) \ (__const char *) (s2))[1]); \ if (l2 > 1 && __result == 0) \ { \ __result = \ (__s1[2] - ((__const unsigned char *) \ (__const char *) (s2))[2]); \ if (l2 > 2 && __result == 0) \ __result = \ (__s1[3] \ - ((__const unsigned char *) \ (__const char *) (s2))[3]); \ } \ } \ __result; })) #endif /* Compare N characters of S1 and S2. */ #ifndef _HAVE_STRING_ARCH_strncmp # define strncmp(s1, s2, n) \ (__extension__ (__builtin_constant_p (n) \ && ((__builtin_constant_p (s1) \ && strlen (s1) < ((size_t) (n))) \ || (__builtin_constant_p (s2) \ && strlen (s2) < ((size_t) (n)))) \ ? strcmp (s1, s2) : strncmp (s1, s2, n))) #endif /* Return the length of the initial segment of S which consists entirely of characters not in REJECT. */ #if !defined _HAVE_STRING_ARCH_strcspn || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_strcspn # if __GNUC_PREREQ (3, 2) # define strcspn(s, reject) \ __extension__ \ ({ char __r0, __r1, __r2; \ (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ ? __builtin_strcspn (s, reject) \ : ((__r0 = ((__const char *) (reject))[0], __r0 == '\0') \ ? strlen (s) \ : ((__r1 = ((__const char *) (reject))[1], __r1 == '\0') \ ? __strcspn_c1 (s, __r0) \ : ((__r2 = ((__const char *) (reject))[2], __r2 == '\0') \ ? __strcspn_c2 (s, __r0, __r1) \ : (((__const char *) (reject))[3] == '\0' \ ? __strcspn_c3 (s, __r0, __r1, __r2) \ : __builtin_strcspn (s, reject)))))) \ : __builtin_strcspn (s, reject)); }) # else # define strcspn(s, reject) \ __extension__ \ ({ char __r0, __r1, __r2; \ (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ ? ((__r0 = ((__const char *) (reject))[0], __r0 == '\0') \ ? strlen (s) \ : ((__r1 = ((__const char *) (reject))[1], __r1 == '\0') \ ? __strcspn_c1 (s, __r0) \ : ((__r2 = ((__const char *) (reject))[2], __r2 == '\0') \ ? __strcspn_c2 (s, __r0, __r1) \ : (((__const char *) (reject))[3] == '\0' \ ? __strcspn_c3 (s, __r0, __r1, __r2) \ : strcspn (s, reject))))) \ : strcspn (s, reject)); }) # endif # endif __STRING_INLINE size_t __strcspn_c1 (__const char *__s, int __reject); __STRING_INLINE size_t __strcspn_c1 (__const char *__s, int __reject) { register size_t __result = 0; while (__s[__result] != '\0' && __s[__result] != __reject) ++__result; return __result; } __STRING_INLINE size_t __strcspn_c2 (__const char *__s, int __reject1, int __reject2); __STRING_INLINE size_t __strcspn_c2 (__const char *__s, int __reject1, int __reject2) { register size_t __result = 0; while (__s[__result] != '\0' && __s[__result] != __reject1 && __s[__result] != __reject2) ++__result; return __result; } __STRING_INLINE size_t __strcspn_c3 (__const char *__s, int __reject1, int __reject2, int __reject3); __STRING_INLINE size_t __strcspn_c3 (__const char *__s, int __reject1, int __reject2, int __reject3) { register size_t __result = 0; while (__s[__result] != '\0' && __s[__result] != __reject1 && __s[__result] != __reject2 && __s[__result] != __reject3) ++__result; return __result; } #endif /* Return the length of the initial segment of S which consists entirely of characters in ACCEPT. */ #if !defined _HAVE_STRING_ARCH_strspn || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_strspn # if __GNUC_PREREQ (3, 2) # define strspn(s, accept) \ __extension__ \ ({ char __a0, __a1, __a2; \ (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ ? __builtin_strspn (s, accept) \ : ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ ? ((void) (s), 0) \ : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ ? __strspn_c1 (s, __a0) \ : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ ? __strspn_c2 (s, __a0, __a1) \ : (((__const char *) (accept))[3] == '\0' \ ? __strspn_c3 (s, __a0, __a1, __a2) \ : __builtin_strspn (s, accept)))))) \ : __builtin_strspn (s, accept)); }) # else # define strspn(s, accept) \ __extension__ \ ({ char __a0, __a1, __a2; \ (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ ? ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ ? ((void) (s), 0) \ : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ ? __strspn_c1 (s, __a0) \ : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ ? __strspn_c2 (s, __a0, __a1) \ : (((__const char *) (accept))[3] == '\0' \ ? __strspn_c3 (s, __a0, __a1, __a2) \ : strspn (s, accept))))) \ : strspn (s, accept)); }) # endif # endif __STRING_INLINE size_t __strspn_c1 (__const char *__s, int __accept); __STRING_INLINE size_t __strspn_c1 (__const char *__s, int __accept) { register size_t __result = 0; /* Please note that __accept never can be '\0'. */ while (__s[__result] == __accept) ++__result; return __result; } __STRING_INLINE size_t __strspn_c2 (__const char *__s, int __accept1, int __accept2); __STRING_INLINE size_t __strspn_c2 (__const char *__s, int __accept1, int __accept2) { register size_t __result = 0; /* Please note that __accept1 and __accept2 never can be '\0'. */ while (__s[__result] == __accept1 || __s[__result] == __accept2) ++__result; return __result; } __STRING_INLINE size_t __strspn_c3 (__const char *__s, int __accept1, int __accept2, int __accept3); __STRING_INLINE size_t __strspn_c3 (__const char *__s, int __accept1, int __accept2, int __accept3) { register size_t __result = 0; /* Please note that __accept1 to __accept3 never can be '\0'. */ while (__s[__result] == __accept1 || __s[__result] == __accept2 || __s[__result] == __accept3) ++__result; return __result; } #endif /* Find the first occurrence in S of any character in ACCEPT. */ #if !defined _HAVE_STRING_ARCH_strpbrk || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_strpbrk # if __GNUC_PREREQ (3, 2) # define strpbrk(s, accept) \ __extension__ \ ({ char __a0, __a1, __a2; \ (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ ? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \ ? __builtin_strpbrk (s, accept) \ : ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ ? ((void) (s), (char *) NULL) \ : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ ? __builtin_strchr (s, __a0) \ : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ ? __strpbrk_c2 (s, __a0, __a1) \ : (((__const char *) (accept))[3] == '\0' \ ? __strpbrk_c3 (s, __a0, __a1, __a2) \ : __builtin_strpbrk (s, accept)))))) \ : __builtin_strpbrk (s, accept)); }) # else # define strpbrk(s, accept) \ __extension__ \ ({ char __a0, __a1, __a2; \ (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \ ? ((__a0 = ((__const char *) (accept))[0], __a0 == '\0') \ ? ((void) (s), (char *) NULL) \ : ((__a1 = ((__const char *) (accept))[1], __a1 == '\0') \ ? strchr (s, __a0) \ : ((__a2 = ((__const char *) (accept))[2], __a2 == '\0') \ ? __strpbrk_c2 (s, __a0, __a1) \ : (((__const char *) (accept))[3] == '\0' \ ? __strpbrk_c3 (s, __a0, __a1, __a2) \ : strpbrk (s, accept))))) \ : strpbrk (s, accept)); }) # endif # endif __STRING_INLINE char *__strpbrk_c2 (__const char *__s, int __accept1, int __accept2); __STRING_INLINE char * __strpbrk_c2 (__const char *__s, int __accept1, int __accept2) { /* Please note that __accept1 and __accept2 never can be '\0'. */ while (*__s != '\0' && *__s != __accept1 && *__s != __accept2) ++__s; return *__s == '\0' ? NULL : (char *) (size_t) __s; } __STRING_INLINE char *__strpbrk_c3 (__const char *__s, int __accept1, int __accept2, int __accept3); __STRING_INLINE char * __strpbrk_c3 (__const char *__s, int __accept1, int __accept2, int __accept3) { /* Please note that __accept1 to __accept3 never can be '\0'. */ while (*__s != '\0' && *__s != __accept1 && *__s != __accept2 && *__s != __accept3) ++__s; return *__s == '\0' ? NULL : (char *) (size_t) __s; } #endif /* Find the first occurrence of NEEDLE in HAYSTACK. Newer gcc versions do this itself. */ #if !defined _HAVE_STRING_ARCH_strstr && !__GNUC_PREREQ (2, 97) # define strstr(haystack, needle) \ (__extension__ (__builtin_constant_p (needle) && __string2_1bptr_p (needle) \ ? (((__const char *) (needle))[0] == '\0' \ ? (char *) (size_t) (haystack) \ : (((__const char *) (needle))[1] == '\0' \ ? strchr (haystack, \ ((__const char *) (needle))[0]) \ : strstr (haystack, needle))) \ : strstr (haystack, needle))) #endif #if !defined _HAVE_STRING_ARCH_strtok_r || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_strtok_r # define __strtok_r(s, sep, nextp) \ (__extension__ (__builtin_constant_p (sep) && __string2_1bptr_p (sep) \ && ((__const char *) (sep))[0] != '\0' \ && ((__const char *) (sep))[1] == '\0' \ ? __strtok_r_1c (s, ((__const char *) (sep))[0], nextp) \ : __strtok_r (s, sep, nextp))) # endif __STRING_INLINE char *__strtok_r_1c (char *__s, char __sep, char **__nextp); __STRING_INLINE char * __strtok_r_1c (char *__s, char __sep, char **__nextp) { char *__result; if (__s == NULL) __s = *__nextp; while (*__s == __sep) ++__s; __result = NULL; if (*__s != '\0') { __result = __s++; while (*__s != '\0') if (*__s++ == __sep) { __s[-1] = '\0'; break; } } *__nextp = __s; return __result; } # if defined __USE_POSIX || defined __USE_MISC # define strtok_r(s, sep, nextp) __strtok_r (s, sep, nextp) # endif #endif #if !defined _HAVE_STRING_ARCH_strsep || defined _FORCE_INLINES # ifndef _HAVE_STRING_ARCH_strsep extern char *__strsep_g (char **__stringp, __const char *__delim); # define __strsep(s, reject) \ __extension__ \ ({ char __r0, __r1, __r2; \ (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \ && (__r0 = ((__const char *) (reject))[0], \ ((__const char *) (reject))[0] != '\0') \ ? ((__r1 = ((__const char *) (reject))[1], \ ((__const char *) (reject))[1] == '\0') \ ? __strsep_1c (s, __r0) \ : ((__r2 = ((__const char *) (reject))[2], __r2 == '\0') \ ? __strsep_2c (s, __r0, __r1) \ : (((__const char *) (reject))[3] == '\0' \ ? __strsep_3c (s, __r0, __r1, __r2) \ : __strsep_g (s, reject)))) \ : __strsep_g (s, reject)); }) # endif __STRING_INLINE char *__strsep_1c (char **__s, char __reject); __STRING_INLINE char * __strsep_1c (char **__s, char __reject) { register char *__retval = *__s; if (__retval != NULL && (*__s = strchr (__retval, __reject)) != NULL) *(*__s)++ = '\0'; return __retval; } __STRING_INLINE char *__strsep_2c (char **__s, char __reject1, char __reject2); __STRING_INLINE char * __strsep_2c (char **__s, char __reject1, char __reject2) { register char *__retval = *__s; if (__retval != NULL) { register char *__cp = __retval; while (1) { if (*__cp == '\0') { __cp = NULL; break; } if (*__cp == __reject1 || *__cp == __reject2) { *__cp++ = '\0'; break; } ++__cp; } *__s = __cp; } return __retval; } __STRING_INLINE char *__strsep_3c (char **__s, char __reject1, char __reject2, char __reject3); __STRING_INLINE char * __strsep_3c (char **__s, char __reject1, char __reject2, char __reject3) { register char *__retval = *__s; if (__retval != NULL) { register char *__cp = __retval; while (1) { if (*__cp == '\0') { __cp = NULL; break; } if (*__cp == __reject1 || *__cp == __reject2 || *__cp == __reject3) { *__cp++ = '\0'; break; } ++__cp; } *__s = __cp; } return __retval; } # ifdef __USE_BSD # define strsep(s, reject) __strsep (s, reject) # endif #endif /* We need the memory allocation functions for inline strdup(). Referring to stdlib.h (even minimally) is not allowed in any of the tight standards compliant modes. */ #ifdef __USE_MISC # if !defined _HAVE_STRING_ARCH_strdup || !defined _HAVE_STRING_ARCH_strndup # define __need_malloc_and_calloc # include <stdlib.h> # endif # ifndef _HAVE_STRING_ARCH_strdup extern char *__strdup (__const char *__string) __THROW __attribute_malloc__; # define __strdup(s) \ (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \ ? (((__const char *) (s))[0] == '\0' \ ? (char *) calloc ((size_t) 1, (size_t) 1) \ : ({ size_t __len = strlen (s) + 1; \ char *__retval = (char *) malloc (__len); \ if (__retval != NULL) \ __retval = (char *) memcpy (__retval, s, __len); \ __retval; })) \ : __strdup (s))) # if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED # define strdup(s) __strdup (s) # endif # endif # ifndef _HAVE_STRING_ARCH_strndup extern char *__strndup (__const char *__string, size_t __n) __THROW __attribute_malloc__; # define __strndup(s, n) \ (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \ ? (((__const char *) (s))[0] == '\0' \ ? (char *) calloc ((size_t) 1, (size_t) 1) \ : ({ size_t __len = strlen (s) + 1; \ size_t __n = (n); \ char *__retval; \ if (__n < __len) \ __len = __n + 1; \ __retval = (char *) malloc (__len); \ if (__retval != NULL) \ { \ __retval[__len - 1] = '\0'; \ __retval = (char *) memcpy (__retval, s, \ __len - 1); \ } \ __retval; })) \ : __strndup (s, n))) # ifdef __USE_GNU # define strndup(s, n) __strndup (s, n) # endif # endif #endif /* Use misc. or use GNU. */ #ifndef _FORCE_INLINES # undef __STRING_INLINE #endif #endif /* No string inlines. */
Back to File Manager