diff options
Diffstat (limited to 'libbb/compare_string_array.c')
| -rw-r--r-- | libbb/compare_string_array.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/libbb/compare_string_array.c b/libbb/compare_string_array.c index 4b10cc138..e24815a03 100644 --- a/libbb/compare_string_array.c +++ b/libbb/compare_string_array.c @@ -5,6 +5,24 @@ #include "libbb.h" +char* FAST_FUNC is_prefixed_with(const char *string, const char *key) +{ +#if 0 /* Two passes over key - probably slower */ + int len = strlen(key); + if (strncmp(string, key, len) == 0) + return string + len; + return NULL; +#else /* Open-coded */ + while (*key != '\0') { + if (*key != *string) + return NULL; + key++; + string++; + } + return (char*)string; +#endif +} + /* returns the array index of the string */ /* (index of first match is returned, or -1) */ int FAST_FUNC index_in_str_array(const char *const string_array[], const char *key) @@ -39,10 +57,9 @@ int FAST_FUNC index_in_strings(const char *strings, const char *key) int FAST_FUNC index_in_substr_array(const char *const string_array[], const char *key) { int i; - int len = strlen(key); - if (len) { + if (key[0]) { for (i = 0; string_array[i] != 0; i++) { - if (strncmp(string_array[i], key, len) == 0) { + if (is_prefixed_with(string_array[i], key)) { return i; } } |