diff options
Diffstat (limited to 'mysql/mysys/my_memmem.c')
-rw-r--r-- | mysql/mysys/my_memmem.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/mysql/mysys/my_memmem.c b/mysql/mysys/my_memmem.c deleted file mode 100644 index e15dedf..0000000 --- a/mysql/mysys/my_memmem.c +++ /dev/null @@ -1,84 +0,0 @@ -/* Copyright (c) 2000, 2006, 2007 MySQL AB - Use is subject to license terms - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ - -#include <my_global.h> -#include <m_string.h> - -/* - my_memmem, port of a GNU extension. - - Returns a pointer to the beginning of the substring, needle, or NULL if the - substring is not found in haystack. -*/ - -void *my_memmem(const void *haystack, size_t haystacklen, - const void *needle, size_t needlelen) -{ - const unsigned char *cursor; - const unsigned char *last_possible_needle_location = - (unsigned char *)haystack + haystacklen - needlelen; - - /* Easy answers */ - if (needlelen > haystacklen) return(NULL); - if (needle == NULL) return(NULL); - if (haystack == NULL) return(NULL); - if (needlelen == 0) return(NULL); - if (haystacklen == 0) return(NULL); - - for (cursor = haystack; cursor <= last_possible_needle_location; cursor++) { - if (memcmp(needle, cursor, needlelen) == 0) { - return((void *) cursor); - } - } - return(NULL); -} - - - -#ifdef MAIN -#include <assert.h> - -int main(int argc, char *argv[]) { - char haystack[10], needle[3]; - - memmove(haystack, "0123456789", 10); - - memmove(needle, "no", 2); - assert(my_memmem(haystack, 10, needle, 2) == NULL); - - memmove(needle, "345", 3); - assert(my_memmem(haystack, 10, needle, 3) != NULL); - - memmove(needle, "789", 3); - assert(my_memmem(haystack, 10, needle, 3) != NULL); - assert(my_memmem(haystack, 9, needle, 3) == NULL); - - memmove(needle, "012", 3); - assert(my_memmem(haystack, 10, needle, 3) != NULL); - assert(my_memmem(NULL, 10, needle, 3) == NULL); - - assert(my_memmem(NULL, 10, needle, 3) == NULL); - assert(my_memmem(haystack, 0, needle, 3) == NULL); - assert(my_memmem(haystack, 10, NULL, 3) == NULL); - assert(my_memmem(haystack, 10, needle, 0) == NULL); - - assert(my_memmem(haystack, 1, needle, 3) == NULL); - - printf("success\n"); - return(0); -} - -#endif |