| .TH PCRE_STUDY 3 " 24 June 2012" "PCRE 8.30" |
| .SH NAME |
| PCRE - Perl-compatible regular expressions |
| .SH SYNOPSIS |
| .rs |
| .sp |
| .B #include <pcre.h> |
| .PP |
| .nf |
| .B pcre_extra *pcre_study(const pcre *\fIcode\fP, int \fIoptions\fP, |
| .B " const char **\fIerrptr\fP);" |
| .sp |
| .B pcre16_extra *pcre16_study(const pcre16 *\fIcode\fP, int \fIoptions\fP, |
| .B " const char **\fIerrptr\fP);" |
| .sp |
| .B pcre32_extra *pcre32_study(const pcre32 *\fIcode\fP, int \fIoptions\fP, |
| .B " const char **\fIerrptr\fP);" |
| .fi |
| . |
| .SH DESCRIPTION |
| .rs |
| .sp |
| This function studies a compiled pattern, to see if additional information can |
| be extracted that might speed up matching. Its arguments are: |
| .sp |
| \fIcode\fP A compiled regular expression |
| \fIoptions\fP Options for \fBpcre[16|32]_study()\fP |
| \fIerrptr\fP Where to put an error message |
| .sp |
| If the function succeeds, it returns a value that can be passed to |
| \fBpcre[16|32]_exec()\fP or \fBpcre[16|32]_dfa_exec()\fP via their \fIextra\fP |
| arguments. |
| .P |
| If the function returns NULL, either it could not find any additional |
| information, or there was an error. You can tell the difference by looking at |
| the error value. It is NULL in first case. |
| .P |
| The only option is PCRE_STUDY_JIT_COMPILE. It requests just-in-time compilation |
| if possible. If PCRE has been compiled without JIT support, this option is |
| ignored. See the |
| .\" HREF |
| \fBpcrejit\fP |
| .\" |
| page for further details. |
| .P |
| There is a complete description of the PCRE native API in the |
| .\" HREF |
| \fBpcreapi\fP |
| .\" |
| page and a description of the POSIX API in the |
| .\" HREF |
| \fBpcreposix\fP |
| .\" |
| page. |