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 43c59e8e0..599449fe0 100644 --- a/libbb/compare_string_array.c +++ b/libbb/compare_string_array.c @@ -53,19 +53,24 @@ int FAST_FUNC index_in_substr_array(const char *const string_array[], const char int FAST_FUNC index_in_substrings(const char *strings, const char *key) { - int len = strlen(key); + int matched_idx = -1; + const int len = strlen(key); if (len) { int idx = 0; while (*strings) { if (strncmp(strings, key, len) == 0) { - return idx; + if (strings[len] == '\0') + return idx; /* exact match */ + if (matched_idx >= 0) + return -1; /* ambiguous match */ + matched_idx = idx; } strings += strlen(strings) + 1; /* skip NUL */ idx++; } } - return -1; + return matched_idx; } const char* FAST_FUNC nth_string(const char *strings, int n) @@ -76,3 +81,15 @@ const char* FAST_FUNC nth_string(const char *strings, int n) } return strings; } + +#ifdef UNUSED_SO_FAR /* only brctl.c needs it yet */ +/* Returns 0 for no, 1 for yes or a negative value on error. */ +smallint FAST_FUNC yesno(const char *str) +{ + static const char no_yes[] ALIGN1 = + "0\0" "off\0" "no\0" + "1\0" "on\0" "yes\0"; + int ret = index_in_substrings(no_yes, str); + return ret / 3; +} +#endif |