The following subroutines handle regular expressions:
| regcomp | Compiles a regular expression for comparison by the regexec subroutine. |
| regerror | Returns the error message, appropriate for the current locale, that corresponds to the error code returned by either the regcomp or regexec subroutine. |
| regexec | Compares a string with a compiled regular expression from a previous call to the regcomp subroutine. |
| regfree | Frees any memory allocated by a previous call to the regcomp subroutine. |
For more information about multibyte character subroutines see "National Language Support Subroutines Overview".
For more NLS subroutines see "List of National Language Support Subroutines".