diff options
Diffstat (limited to 'src/utils.c')
| -rw-r--r-- | src/utils.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c index b8b4ef56..9ab990ab 100644 --- a/src/utils.c +++ b/src/utils.c @@ -928,4 +928,18 @@ const char osmo_luhn(const char* in, int in_len) return (sum * 9) % 10 + '0'; } +/*! Compare start of a string. + * This is an optimisation of 'strstr(str, startswith_str) == str' because it doesn't search through the entire string. + * \param str (Longer) string to compare. + * \param startswith_str (Shorter) string to compare with the start of str. + * \return true iff the first characters of str fully match startswith_str or startswith_str is empty. */ +bool osmo_str_startswith(const char *str, const char *startswith_str) +{ + if (!startswith_str || !*startswith_str) + return true; + if (!str) + return false; + return strncmp(str, startswith_str, strlen(startswith_str)) == 0; +} + /*! @} */ |