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   pcreapi    ( 3 )

Perl-совместимые регулярные выражения (Perl-compatible regular expressions)
  Name  |  Pcre native api basic functions  |  Pcre native api string extraction functions  |  Pcre native api auxiliary functions  |  Pcre native api indirected functions  |    Pcre 8-bit, 16-bit, and 32-bit libraries    |  Pcre api overview  |  Newlines  |  Multithreading  |  Saving precompiled patterns for later use  |  Checking build-time options  |  Compiling a pattern  |  Compilation error codes  |  Studying a pattern  |  Locale support  |  Information about a pattern  |  Reference counts  |  Matching a pattern: the traditional function  |  Extracting captured substrings by number  |  Extracting captured substrings by name  |  Duplicate subpattern names  |  Finding all possible matches  |  Obtaining an estimate of stack usage  |  Matching a pattern: the alternative function  |  See also  |

PCRE 8-BIT, 16-BIT, AND 32-BIT LIBRARIES

As well as support for 8-bit character strings, PCRE also supports 16-bit strings (from release 8.30) and 32-bit strings (from release 8.32), by means of two additional libraries. They can be built as well as, or instead of, the 8-bit library. To avoid too much complication, this document describes the 8-bit versions of the functions, with only occasional references to the 16-bit and 32-bit libraries.

The 16-bit and 32-bit functions operate in the same way as their 8-bit counterparts; they just use different data types for their arguments and results, and their names start with pcre16_ or pcre32_ instead of pcre_. For every option that has UTF8 in its name (for example, PCRE_UTF8), there are corresponding 16-bit and 32-bit names with UTF8 replaced by UTF16 or UTF32, respectively. This facility is in fact just cosmetic; the 16-bit and 32-bit option names define the same bit values.

References to bytes and UTF-8 in this document should be read as references to 16-bit data units and UTF-16 when using the 16-bit library, or 32-bit data units and UTF-32 when using the 32-bit library, unless specified otherwise. More details of the specific differences for the 16-bit and 32-bit libraries are given in the pcre16 and pcre32 pages.