trunk/doc/pcre_study.3

.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
.SM
.B pcre_extra *pcre_study(const pcre *\fIcode\fP, int \fIoptions\fP,
.ti +5n
.B const char **\fIerrptr\fP);
.PP
.B pcre16_extra *pcre16_study(const pcre16 *\fIcode\fP, int \fIoptions\fP,
.ti +5n
.B const char **\fIerrptr\fP);
.PP
.B pcre32_extra *pcre32_study(const pcre32 *\fIcode\fP, int \fIoptions\fP,
.ti +5n
.B const char **\fIerrptr\fP);
.
.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.
1	.TH PCRE_STUDY 3 " 24 June 2012" "PCRE 8.30"
2	.SH NAME
3	PCRE - Perl-compatible regular expressions
4	.SH SYNOPSIS
5	.rs
6	.sp
7	.B #include <pcre.h>
8	.PP
9	.SM
10	.B pcre_extra pcre_study(const pcre \fIcode\fP, int \fIoptions\fP,
11	.ti +5n
12	.B const char **\fIerrptr\fP);
13	.PP
14	.B pcre16_extra pcre16_study(const pcre16 \fIcode\fP, int \fIoptions\fP,
15	.ti +5n
16	.B const char **\fIerrptr\fP);
17	.PP
18	.B pcre32_extra pcre32_study(const pcre32 \fIcode\fP, int \fIoptions\fP,
19	.ti +5n
20	.B const char **\fIerrptr\fP);
21	.
22	.SH DESCRIPTION
23	.rs
24	.sp
25	This function studies a compiled pattern, to see if additional information can
26	be extracted that might speed up matching. Its arguments are:
27	.sp
28	\fIcode\fP A compiled regular expression
29	\fIoptions\fP Options for \fBpcre[16\|32]_study()\fP
30	\fIerrptr\fP Where to put an error message
31	.sp
32	If the function succeeds, it returns a value that can be passed to
33	\fBpcre[16\|32]_exec()\fP or \fBpcre[16\|32]_dfa_exec()\fP via their \fIextra\fP
34	arguments.
35	.P
36	If the function returns NULL, either it could not find any additional
37	information, or there was an error. You can tell the difference by looking at
38	the error value. It is NULL in first case.
39	.P
40	The only option is PCRE_STUDY_JIT_COMPILE. It requests just-in-time compilation
41	if possible. If PCRE has been compiled without JIT support, this option is
42	ignored. See the
43	.\" HREF
44	\fBpcrejit\fP
45	.\"
46	page for further details.
47	.P
48	There is a complete description of the PCRE native API in the
49	.\" HREF
50	\fBpcreapi\fP
51	.\"
52	page and a description of the POSIX API in the
53	.\" HREF
54	\fBpcreposix\fP
55	.\"
56	page.
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