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Diffstat (limited to 'src/wchar/wcsstr.c')
| -rw-r--r-- | src/wchar/wcsstr.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/wchar/wcsstr.c b/src/wchar/wcsstr.c new file mode 100644 index 0000000..bba7d96 --- /dev/null +++ b/src/wchar/wcsstr.c @@ -0,0 +1,189 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * 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, either version 3 of the License, or + * (at your option) any later version. + * + * 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, see <http://www.gnu.org/licenses/>. + */ +#include <wchar.h> +#include <stddef.h> +#include <inttypes.h> + +#define WIDE + + + +/** + * This function is identical to `wcsstr`. + */ +wchar_t* wcswcs(const wchar_t* haystack, const wchar_t* needle) +{ + return wcsstr(haystack, needle); +} + + +/** + * Finds the first occurrence of a substring. + * This search is case sensitive. + * + * @param haystack The string to search. + * @param needle The sought after substring. + * @return Pointer to the first occurrence of the + * substring, `NULL` if not found. + */ +wchar_t* wcsstr(const wchar_t* haystack, const wchar_t* needle) +{ + return wmemmem(haystack, wcslen(haystack), needle, wcslen(needle)); +} + + +/** + * Finds the first occurrence of a substring. + * This search is case insensitive. + * + * This is a slibc extension. + * + * @param haystack The string to search. + * @param needle The sought after substring. + * @return Pointer to the first occurrence of the + * substring, `NULL` if not found. + */ +wchar_t* wcscasestr(const wchar_t* haystack, const wchar_t* needle) +{ + return wmemcasemem(haystack, wcslen(haystack), needle, wcslen(needle)); +} + + +/** + * Finds the first occurrence of a substring. + * This search is case sensitive. + * + * This is a slibc extension added for because it was useful + * in implementing slibc itself. + * + * @param haystack The string to search. + * @param needle The sought after substring. + * @param maxlen The maximum number of character to search. + * @return Pointer to the first occurrence of the + * substring, `NULL` if not found. + */ +wchar_t* wcsnstr(const wchar_t* haystack, const wchar_t* needle, size_t maxlen) +{ + return wmemmem(haystack, wcsnlen(haystack, maxlen), needle, wcslen(needle)); +} + + +/** + * Finds the first occurrence of a substring. + * This search is case insensitive. + * + * This is a slibc extension added for completeness. + * + * @param haystack The string to search. + * @param needle The sought after substring. + * @param maxlen The maximum number of character to search. + * @return Pointer to the first occurrence of the + * substring, `NULL` if not found. + */ +wchar_t* wcsncasestr(const wchar_t* haystack, const wchar_t* needle, size_t maxlen) +{ + return wmemcasemem(haystack, wcsnlen(haystack, maxlen), needle, wcslen(needle)); +} + + +/** + * Finds the first occurrence of a substring. + * This search is case sensitive. + * It must already be known that such a substring exists. + * + * This is a slibc extension. + * + * @param haystack The string to search. + * @param needle The sought after substring. + * @return Pointer to the first occurrence of the substring. + */ +wchar_t* rawwcsstr(const wchar_t* haystack, const wchar_t* needle) +{ + return wmemmem(haystack, SIZE_MAX, needle, wcslen(needle)); +} + + +/** + * Finds the first occurrence of a substring. + * This search is case insensitive. + * It must already be known that such a substring exists. + * + * This is a slibc extension. + * + * @param haystack The string to search. + * @param needle The sought after substring. + * @return Pointer to the first occurrence of the substring. + */ +wchar_t* rawwcscasestr(const wchar_t* haystack, const wchar_t* needle) +{ + return wmemcasemem(haystack, SIZE_MAX, needle, wcslen(needle)); +} + + +/** + * Finds the first occurrence of a substring + * This search is case sensitive. + * + * This is a slibc extension added for completeness, + * and because it was it was useful in implementing + * slibc itself. + * + * @param haystack The string to search. + * @param haystack_length The number of character to search. + * @param needle The sought after substring. + * @param needle_length The length of `needle`. + * @return Pointer to the first occurrence of + * the substring, `NULL` if not found. + */ +wchar_t* wmemmem(const wchar_t* haystack, size_t haystack_length, + const wchar_t* needle, size_t needle_length) +{ + if (haystack_length < needle_length) + return NULL; + if (haystack_length == needle_length) + return !wmemcmp(haystack, haystack_length, haystack_length) ? haystack : NULL; +#include "../string/substring.h" +} + + +/** + * Finds the first occurrence of a substring + * This search is case insensitive. + * + * This is a slibc extension added because it was useful + * in implementing slibc itself. + * + * @param haystack The string to search. + * @param haystack_length The number of character to search. + * @param needle The sought after substring. + * @param needle_length The length of `needle`. + * @return Pointer to the first occurrence of + * the substring, `NULL` if not found. + */ +wchar_t* wmemcasemem(const wchar_t* haystack, size_t haystack_length, + const wchar_t* needle, size_t needle_length) +{ + if (haystack_length < needle_length) + return NULL; + if (haystack_length == needle_length) + return !wmemcasecmp(haystack, haystack_length, haystack_length) ? haystack : NULL; +#define CASE +#include "../string/substring.h" +#undef CASE +} + |