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<title>pcre2_config specification</title>
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<h1>pcre2_config man page</h1>
<p>
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</p>
<p>
This page is part of the PCRE2 HTML documentation. It was generated
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<br>
<br><b>
SYNOPSIS
</b><br>
<P>
<b>#include &#60;pcre2.h&#62;</b>
</P>
<P>
<b>int pcre2_config(uint32_t <i>what</i>, void *<i>where</i>);</b>
</P>
<br><b>
DESCRIPTION
</b><br>
<P>
This function makes it possible for a client program to find out which optional
features are available in the version of the PCRE2 library it is using. The
arguments are as follows:
<pre>
  <i>what</i>     A code specifying what information is required
  <i>where</i>    Points to where to put the information
</pre>
If <i>where</i> is NULL, the function returns the amount of memory needed for
the requested information. When the information is a string, the value is in
code units; for other types of data it is in bytes.
</P>
<P>
If <b>where</b> is not NULL, for PCRE2_CONFIG_JITTARGET,
PCRE2_CONFIG_UNICODE_VERSION, and PCRE2_CONFIG_VERSION it must point to a
buffer that is large enough to hold the string. For all other codes it must
point to a uint32_t integer variable. The available codes are:
<pre>
  PCRE2_CONFIG_BSR             Indicates what \R matches by default:
                                 PCRE2_BSR_UNICODE
                                 PCRE2_BSR_ANYCRLF
  PCRE2_CONFIG_COMPILED_WIDTHS Which of 8/16/32 support was compiled
  PCRE2_CONFIG_DEPTHLIMIT      Default backtracking depth limit
  PCRE2_CONFIG_HEAPLIMIT       Default heap memory limit
  PCRE2_CONFIG_JIT             Availability of just-in-time compiler support (1=yes 0=no)
  PCRE2_CONFIG_JITTARGET       Information (a string) about the target architecture for the JIT compiler
  PCRE2_CONFIG_LINKSIZE        Configured internal link size (2, 3, 4)
  PCRE2_CONFIG_MATCHLIMIT      Default internal resource limit
  PCRE2_CONFIG_NEVER_BACKSLASH_C  Whether or not \C is disabled
  PCRE2_CONFIG_NEWLINE         Code for the default newline sequence:
                                 PCRE2_NEWLINE_CR
                                 PCRE2_NEWLINE_LF
                                 PCRE2_NEWLINE_CRLF
                                 PCRE2_NEWLINE_ANY
                                 PCRE2_NEWLINE_ANYCRLF
                                 PCRE2_NEWLINE_NUL
  PCRE2_CONFIG_PARENSLIMIT     Default parentheses nesting limit
  PCRE2_CONFIG_RECURSIONLIMIT  Obsolete: use PCRE2_CONFIG_DEPTHLIMIT
  PCRE2_CONFIG_STACKRECURSE    Obsolete: always returns 0
  PCRE2_CONFIG_UNICODE         Availability of Unicode support (1=yes 0=no)
  PCRE2_CONFIG_UNICODE_VERSION The Unicode version (a string)
  PCRE2_CONFIG_VERSION         The PCRE2 version (a string)
</pre>
The function yields a non-negative value on success or the negative value
PCRE2_ERROR_BADOPTION otherwise. This is also the result for the
PCRE2_CONFIG_JITTARGET code if JIT support is not available. When a string is
requested, the function returns the number of code units used, including the
terminating zero.
</P>
<P>
There is a complete description of the PCRE2 native API in the
<a href="pcre2api.html"><b>pcre2api</b></a>
page and a description of the POSIX API in the
<a href="pcre2posix.html"><b>pcre2posix</b></a>
page.
<p>
Return to the <a href="index.html">PCRE2 index page</a>.
</p>
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