34 lines
1014 B
C
34 lines
1014 B
C
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#include <str_util.h>
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const char* str_util_strnstr(const char* haystack, const char* needle, os_size_t needle_len) {
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if (needle_len == 0) return (char*)haystack;
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if (!haystack || !needle || haystack[0]=='\0') return NULL;
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os_size_t haystack_len = strlen(haystack);
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if (haystack_len < needle_len) return NULL;
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for (os_size_t i = 0; i <= haystack_len - needle_len; i++) {
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if (memcmp(haystack + i, needle, needle_len) == 0) {
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return haystack + i;
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}
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}
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return NULL;
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}
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const char* str_util_strstr(const char* haystack, const char* needle) {
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if (!haystack || !needle || haystack[0]=='\0' || needle[0]=='\0') return NULL;
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os_size_t needle_len = strlen(needle);
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os_size_t haystack_len = strlen(haystack);
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if (haystack_len < needle_len) return NULL;
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for (os_size_t i = 0; i <= haystack_len - needle_len; i++) {
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if (memcmp(haystack + i, needle, needle_len) == 0) {
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return haystack + i;
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}
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}
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return NULL;
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}
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