Regex: Add PCRE 8.32 in tools directory.

tools/pcre/doc/pcre_get_substring_list.3

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+.TH PCRE_GET_SUBSTRING_LIST 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 int pcre_get_substring_list(const char *\fIsubject\fP,
+.ti +5n
+.B int *\fIovector\fP, int \fIstringcount\fP, "const char ***\fIlistptr\fP);"
+.PP
+.B int pcre16_get_substring_list(PCRE_SPTR16 \fIsubject\fP,
+.ti +5n
+.B int *\fIovector\fP, int \fIstringcount\fP, "PCRE_SPTR16 **\fIlistptr\fP);"
+.PP
+.B int pcre32_get_substring_list(PCRE_SPTR32 \fIsubject\fP,
+.ti +5n
+.B int *\fIovector\fP, int \fIstringcount\fP, "PCRE_SPTR32 **\fIlistptr\fP);"
+.
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for extracting a list of all the captured
+substrings. The arguments are:
+.sp
+  \fIsubject\fP       Subject that has been successfully matched
+  \fIovector\fP       Offset vector that \fBpcre[16|32]_exec\fP used
+  \fIstringcount\fP   Value returned by \fBpcre[16|32]_exec\fP
+  \fIlistptr\fP       Where to put a pointer to the list
+.sp
+The memory in which the substrings and the list are placed is obtained by
+calling \fBpcre[16|32]_malloc()\fP. The convenience function
+\fBpcre[16|32]_free_substring_list()\fP can be used to free it when it is no
+longer needed. A pointer to a list of pointers is put in the variable whose
+address is in \fIlistptr\fP. The list is terminated by a NULL pointer. The
+yield of the function is zero on success or PCRE_ERROR_NOMEMORY if sufficient
+memory could not be obtained.
+.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.