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author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
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committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/missing/strstr.c |
Fresh start
Diffstat (limited to 'jni/ruby/missing/strstr.c')
-rw-r--r-- | jni/ruby/missing/strstr.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/jni/ruby/missing/strstr.c b/jni/ruby/missing/strstr.c new file mode 100644 index 0000000..e6613c5 --- /dev/null +++ b/jni/ruby/missing/strstr.c @@ -0,0 +1,29 @@ +/* public domain rewrite of strstr(3) */ + +#include "ruby/missing.h" + +size_t strlen(const char*); + +char * +strstr(const char *haystack, const char *needle) +{ + const char *hend; + const char *a, *b; + + if (*needle == 0) return (char *)haystack; + hend = haystack + strlen(haystack) - strlen(needle) + 1; + while (haystack < hend) { + if (*haystack == *needle) { + a = haystack; + b = needle; + for (;;) { + if (*b == 0) return (char *)haystack; + if (*a++ != *b++) { + break; + } + } + } + haystack++; + } + return 0; +} |