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POSIX Regex Functions
=====================
If you're writing code that has to be POSIX compatible, you'll need
to use these functions. Their interfaces are as specified by POSIX,
draft 1003.2/D11.2.
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- POSIX Pattern Buffers
- The regex_t type.
- POSIX Regular Expression Compiling
- regcomp ()
- POSIX Matching
- regexec ()
- Reporting Errors
- regerror ()
- Using Byte Offsets
- The regmatch_t type.
- Freeing POSIX Pattern Buffers
- regfree ()