pcre_exec man page
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SYNOPSIS
#include <pcre.h>
int pcre_exec(const pcre *code, const pcre_extra *extra,const char *subject, int length, int startoffset,int options, int *ovector, int ovecsize);
DESCRIPTION
This function matches a compiled regular expression against a given subject
string, using a matching algorithm that is similar to Perl's. It returns
offsets to captured substrings. Its arguments are:
  
code         Points to the compiled pattern
  
extra        Points to an associated pcre_extra structure,
                 or is NULL
  
subject      Points to the subject string
  
length       Length of the subject string, in bytes
  
startoffset  Offset in bytes in the subject at which to
                 start matching
  
options      Option bits
  
ovector      Points to a vector of ints for result offsets
  
ovecsize     Number of elements in the vector (a multiple of 3)
The options are:
  PCRE_ANCHORED      Match only at the first position
  PCRE_NOTBOL        Subject is not the beginning of a line
  PCRE_NOTEOL        Subject is not the end of a line
  PCRE_NOTEMPTY      An empty string is not a valid match
  PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
                       validity (only relevant if PCRE_UTF8
                       was set at compile time)
  PCRE_PARTIAL       Return PCRE_ERROR_PARTIAL for a partial match
There are restrictions on what may appear in a pattern when partial matching is
requested.
A 
pcre_extra structure contains the following fields:
  
flags        Bits indicating which fields are set
  
study_data   Opaque data from pcre_study()  
match_limit  Limit on internal recursion
  
callout_data Opaque data passed back to callouts
  
tables       Points to character tables or is NULL
The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
PCRE_EXTRA_CALLOUT_DATA, and PCRE_EXTRA_TABLES.
There is a complete description of the PCRE native API in the
pcreapi.htmlpcreapi page and a description of the POSIX API in the
pcreposix.htmlpcreposix page.
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index.htmlPCRE index page .
