yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1991,92,96,97,99,2000,2001 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, write to the Free |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 17 | 02111-1307 USA. */ |
| 18 | |
| 19 | #ifndef _STRINGS_H |
| 20 | #define _STRINGS_H 1 |
| 21 | |
| 22 | /* We don't need and should not read this file if <string.h> was already |
| 23 | read. The one exception being that if __USE_BSD isn't defined, then |
| 24 | these aren't defined in string.h, so we need to define them here. */ |
| 25 | |
| 26 | /* keep this file in sync w/ string.h, the glibc version is out of date */ |
| 27 | |
| 28 | #if !defined _STRING_H || !defined __USE_BSD |
| 29 | |
| 30 | # include <features.h> |
| 31 | # define __need_size_t |
| 32 | # include <stddef.h> |
| 33 | |
| 34 | __BEGIN_DECLS |
| 35 | |
| 36 | # ifdef __UCLIBC_SUSV3_LEGACY__ |
| 37 | /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */ |
| 38 | extern void bcopy (__const void *__src, void *__dest, size_t __n) |
| 39 | __THROW __nonnull ((1, 2)); |
| 40 | |
| 41 | /* Set N bytes of S to 0. */ |
| 42 | extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
| 43 | |
| 44 | /* Compare N bytes of S1 and S2 (same as memcmp). */ |
| 45 | extern int bcmp (__const void *__s1, __const void *__s2, size_t __n) |
| 46 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
| 47 | |
| 48 | /* Find the first occurrence of C in S (same as strchr). */ |
| 49 | extern char *index (__const char *__s, int __c) |
| 50 | __THROW __attribute_pure__ __nonnull ((1)); |
| 51 | |
| 52 | /* Find the last occurrence of C in S (same as strrchr). */ |
| 53 | extern char *rindex (__const char *__s, int __c) |
| 54 | __THROW __attribute_pure__ __nonnull ((1)); |
| 55 | # else |
| 56 | # ifdef __UCLIBC_SUSV3_LEGACY_MACROS__ |
| 57 | /* bcopy/bzero/bcmp/index/rindex are marked LEGACY in SuSv3. |
| 58 | * They are replaced as proposed by SuSv3. Don't sync this part |
| 59 | * with glibc and keep it in sync with string.h. */ |
| 60 | |
| 61 | # define bcopy(src,dest,n) (memmove((dest), (src), (n)), (void) 0) |
| 62 | # define bzero(s,n) (memset((s), '\0', (n)), (void) 0) |
| 63 | # define bcmp(s1,s2,n) memcmp((s1), (s2), (size_t)(n)) |
| 64 | # define index(s,c) strchr((s), (c)) |
| 65 | # define rindex(s,c) strrchr((s), (c)) |
| 66 | # endif |
| 67 | # endif |
| 68 | |
| 69 | /* Return the position of the first bit set in I, or 0 if none are set. |
| 70 | The least-significant bit is position 1, the most-significant 32. */ |
| 71 | extern int ffs (int __i) __THROW __attribute__ ((__const__)); |
| 72 | |
| 73 | /* The following two functions are non-standard but necessary for non-32 bit |
| 74 | platforms. */ |
| 75 | #if 0 /*def __USE_GNU*/ |
| 76 | extern int ffsl (long int __l) __THROW __attribute__ ((__const__)); |
| 77 | # ifdef __GNUC__ |
| 78 | __extension__ extern int ffsll (long long int __ll) |
| 79 | __THROW __attribute__ ((__const__)); |
| 80 | # endif |
| 81 | # endif |
| 82 | |
| 83 | /* Compare S1 and S2, ignoring case. */ |
| 84 | extern int strcasecmp (__const char *__s1, __const char *__s2) |
| 85 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
| 86 | |
| 87 | /* Compare no more than N chars of S1 and S2, ignoring case. */ |
| 88 | extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n) |
| 89 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
| 90 | |
| 91 | __END_DECLS |
| 92 | |
| 93 | |
| 94 | #ifdef _LIBC |
| 95 | #error "<strings.h> should not be included from libc." |
| 96 | #endif |
| 97 | |
| 98 | |
| 99 | #endif /* string.h */ |
| 100 | |
| 101 | #endif /* strings.h */ |