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.TH PCRE2_PATTERN_INFO 3 "14 February 2019" "PCRE2 10.33".SH NAMEPCRE2 - Perl-compatible regular expressions (revised API).SH SYNOPSIS.rs.sp.B #include <pcre2.h>.PP.nf.B int pcre2_pattern_info(const pcre2_code *\fIcode\fP, uint32_t \fIwhat\fP,.B " void *\fIwhere\fP);".fi..SH DESCRIPTION.rs.spThis function returns information about a compiled pattern. Its arguments are:.sp \fIcode\fP Pointer to a compiled regular expression pattern \fIwhat\fP What information is required \fIwhere\fP Where to put the information.spThe recognized values for the \fIwhat\fP argument, and the information theyrequest are as follows:.sp PCRE2_INFO_ALLOPTIONS Final options after compiling PCRE2_INFO_ARGOPTIONS Options passed to \fBpcre2_compile()\fP PCRE2_INFO_BACKREFMAX Number of highest backreference PCRE2_INFO_BSR What \eR matches: PCRE2_BSR_UNICODE: Unicode line endings PCRE2_BSR_ANYCRLF: CR, LF, or CRLF only PCRE2_INFO_CAPTURECOUNT Number of capturing subpatterns.\" JOIN PCRE2_INFO_DEPTHLIMIT Backtracking depth limit if set, otherwise PCRE2_ERROR_UNSET PCRE2_INFO_EXTRAOPTIONS Extra options that were passed in the compile context PCRE2_INFO_FIRSTBITMAP Bitmap of first code units, or NULL PCRE2_INFO_FIRSTCODETYPE Type of start-of-match information 0 nothing set 1 first code unit is set 2 start of string or after newline PCRE2_INFO_FIRSTCODEUNIT First code unit when type is 1 PCRE2_INFO_FRAMESIZE Size of backtracking frame PCRE2_INFO_HASBACKSLASHC Return 1 if pattern contains \eC.\" JOIN PCRE2_INFO_HASCRORLF Return 1 if explicit CR or LF matches exist in the pattern.\" JOIN PCRE2_INFO_HEAPLIMIT Heap memory limit if set, otherwise PCRE2_ERROR_UNSET PCRE2_INFO_JCHANGED Return 1 if (?J) or (?-J) was used PCRE2_INFO_JITSIZE Size of JIT compiled code, or 0 PCRE2_INFO_LASTCODETYPE Type of must-be-present information 0 nothing set 1 code unit is set PCRE2_INFO_LASTCODEUNIT Last code unit when type is 1.\" JOIN PCRE2_INFO_MATCHEMPTY 1 if the pattern can match an empty string, 0 otherwise.\" JOIN PCRE2_INFO_MATCHLIMIT Match limit if set, otherwise PCRE2_ERROR_UNSET.\" JOIN PCRE2_INFO_MAXLOOKBEHIND Length (in characters) of the longest lookbehind assertion PCRE2_INFO_MINLENGTH Lower bound length of matching strings PCRE2_INFO_NAMECOUNT Number of named subpatterns PCRE2_INFO_NAMEENTRYSIZE Size of name table entries PCRE2_INFO_NAMETABLE Pointer to name table PCRE2_CONFIG_NEWLINE Code for the newline sequence: PCRE2_NEWLINE_CR PCRE2_NEWLINE_LF PCRE2_NEWLINE_CRLF PCRE2_NEWLINE_ANY PCRE2_NEWLINE_ANYCRLF PCRE2_NEWLINE_NUL PCRE2_INFO_RECURSIONLIMIT Obsolete synonym for PCRE2_INFO_DEPTHLIMIT PCRE2_INFO_SIZE Size of compiled pattern.spIf \fIwhere\fP is NULL, the function returns the amount of memory needed forthe requested information, in bytes. Otherwise, the \fIwhere\fP argument mustpoint to an unsigned 32-bit integer (uint32_t variable), except for thefollowing \fIwhat\fP values, when it must point to a variable of the typeshown:.sp PCRE2_INFO_FIRSTBITMAP const uint8_t * PCRE2_INFO_JITSIZE size_t PCRE2_INFO_NAMETABLE PCRE2_SPTR PCRE2_INFO_SIZE size_t.spThe yield of the function is zero on success or:.sp PCRE2_ERROR_NULL the argument \fIcode\fP is NULL PCRE2_ERROR_BADMAGIC the "magic number" was not found PCRE2_ERROR_BADOPTION the value of \fIwhat\fP is invalid PCRE2_ERROR_BADMODE the pattern was compiled in the wrong mode PCRE2_ERROR_UNSET the requested information is not set.PThere is a complete description of the PCRE2 native API in the.\" HREF\fBpcre2api\fP.\"page and a description of the POSIX API in the.\" HREF\fBpcre2posix\fP.\"page.
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