diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asterisk/strings.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/asterisk/strings.h b/include/asterisk/strings.h index 79dac8700..4f5e326cf 100644 --- a/include/asterisk/strings.h +++ b/include/asterisk/strings.h @@ -23,6 +23,8 @@ #ifndef _ASTERISK_STRINGS_H #define _ASTERISK_STRINGS_H +#include <ctype.h> + #include "asterisk/inline_api.h" #include "asterisk/utils.h" #include "asterisk/threadstorage.h" @@ -702,4 +704,21 @@ static force_inline int ast_str_hash(const char *str) return abs(hash); } +/*! + * \brief Compute a hash value on a case-insensitive string + * + * Uses the same hash algorithm as ast_str_hash, but converts + * all characters to lowercase prior to computing a hash. This + * allows for easy case-insensitive lookups in a hash table. + */ +static force_inline int ast_str_case_hash(const char *str) +{ + int hash = 5381; + + while (*str) { + hash = hash * 33 ^ tolower(*str++); + } + + return abs(hash); +} #endif /* _ASTERISK_STRINGS_H */ |