diff options
Diffstat (limited to 'src/libc/src/mem.c')
| -rw-r--r-- | src/libc/src/mem.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/src/libc/src/mem.c b/src/libc/src/mem.c new file mode 100644 index 0000000..a75ff85 --- /dev/null +++ b/src/libc/src/mem.c @@ -0,0 +1,251 @@ +/* + * <mem.c> + * + * Open Hack'Ware BIOS: mem<xxx> functions + * + * Copyright (c) 2004-2005 Jocelyn Mayer + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License V2 + * as published by the Free Software Foundation + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* functions prototypes are here */ +#include <string.h> +/* NULL is declared here */ +#include <stdlib.h> + +/* mem___ functions */ +#if defined (__USE_memcpy__) +void *memcpy (void *dest, const void *src, size_t n) +{ + const char *p; + char *q; + + p = src; + q = dest; + for (; n != 0; n--) + *q++ = *p++; + + return dest; +} +#endif + +#if defined (__USE_memccpy__) +void *memccpy (void *dest, const void *src, int c, size_t n) +{ + const char *p; + char *q, *r; + + p = src; + q = dest; + r = NULL; + for (; n != 0; n--, q++) { + *q = *p++; + if (*q == c) { + r = q; + break; + } + } + + return r; +} +#endif + +#if defined (__USE_mempcpy__) +/* GNU extension */ +void *mempcpy (void *dest, const void *src, size_t n) +{ + const char *p; + char *q; + + p = src; + q = dest; + for (; n != 0; n--) + *q++ = *p++; + + return q; +} +#endif + +#if defined (__USE_memmove__) +void *memmove (void *dest, const void *src, size_t n) +{ + const char *p; + char *q; + + p = src; + q = dest; + if (dest <= src) { + for (; n != 0; n--) + *q++ = *p++; + } else { + p += n; + q += n; + for (; n != 0; n--) + *--q = *--p; + } + + return dest; +} +#endif + +#if defined (__USE_memcmove__) +/* OHW extension */ +void *memcmove (void *dest, const void *src, int c, size_t n) +{ + const char *p; + char *q, *r; + + p = src; + q = dest; + r = NULL; + if (dest <= src) { + for (; n != 0; n--, q++) { + *q++ = *p++; + if (*q == c) { + r = q; + break; + } + } + } else { + p += n; + q += n; + for (; n != 0; n--, q--) { + *--q = *--p; + if (*q == c) { + r = q; + break; + } + } + } + + return dest; +} +#endif + +#if defined (__USE_mempmove__) +/* OHW extension */ +void *mempmove (void *dest, const void *src, size_t n) +{ + const char *p; + char *q, *r; + + p = src; + q = dest; + r = q + n; + if (dest <= src) { + for (; n != 0; n--) + *q++ = *p++; + } else { + p += n; + q = r; + for (; n != 0; n--) + *--q = *--p; + } + + return r; +} +#endif + +#if defined (__USE_memset__) +void *memset (void *s, int c, size_t n) +{ + char *p; + + for (p = s; n != 0; n--) + *p++ = c; + + return s; +} +#endif + +#if defined (__USE_memcmp__) +int memcmp (const void *s1, const void *s2, size_t n) +{ + const char *p, *q; + int ret; + + p = s1; + q = s2; + for (ret = 0; n != 0 && ret == 0; n--) + ret = *p++ - *q++; + + return ret; +} +#endif + +#if defined (__USE_memchr__) +void *memchr (const void *s, int c, size_t n) +{ + const char *p, *r; + + r = NULL; + for (p = s; n != 0; n--, p++) { + if (*p == c) { + r = p; + break; + } + } + + return (void *)r; +} +#endif + +#if defined (__USE_rawmemchr__) +/* GNU extension */ +void *rawmemchr (const void *s, int c) +{ + const char *p; + + for (p = s; *p != c; p++) + continue; + + return (void *)p; +} +#endif + +#if defined (__USE_memrchr__) +void *memrchr (const void *s, int c, size_t n) +{ + const char *p, *r; + + r = NULL; + for (p = s + n; n != 0; n--, p--) { + if (*p == c) { + r = p; + break; + } + } + + return (void *)r; +} +#endif + +#if defined (__USE_memmem__) +/* GNU extension */ +void *memmem (const void *haystack, size_t haystacklen, + const void *needle, size_t neddlelen) +{ + const char *p, *r; + + r = NULL; + for (p = haystack; haystacklen > neddlelen; haystacklen--, p++) { + if (memcmp(p, needle, neddlelen) == 0) { + r = p; + break; + } + } + + return (void *)r; +} +#endif |