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//opt/pcre/share/man/man3/pcre_dfa_exec.3
.TH PCRE_DFA_EXEC 3 "12 May 2013" "PCRE 8.33" .SH NAME PCRE - Perl-compatible regular expressions .SH SYNOPSIS .rs .sp .B #include <pcre.h> .PP .nf .B int pcre_dfa_exec(const pcre *\fIcode\fP, "const pcre_extra *\fIextra\fP," .B " const char *\fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP," .B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP," .B " int *\fIworkspace\fP, int \fIwscount\fP);" .sp .B int pcre16_dfa_exec(const pcre16 *\fIcode\fP, "const pcre16_extra *\fIextra\fP," .B " PCRE_SPTR16 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP," .B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP," .B " int *\fIworkspace\fP, int \fIwscount\fP);" .sp .B int pcre32_dfa_exec(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP," .B " PCRE_SPTR32 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP," .B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP," .B " int *\fIworkspace\fP, int \fIwscount\fP);" .fi . .SH DESCRIPTION .rs .sp This function matches a compiled regular expression against a given subject string, using an alternative matching algorithm that scans the subject string just once (\fInot\fP Perl-compatible). Note that the main, Perl-compatible, matching function is \fBpcre[16|32]_exec()\fP. The arguments for this function are: .sp \fIcode\fP Points to the compiled pattern \fIextra\fP Points to an associated \fBpcre[16|32]_extra\fP structure, or is NULL \fIsubject\fP Points to the subject string \fIlength\fP Length of the subject string \fIstartoffset\fP Offset in the subject at which to start matching \fIoptions\fP Option bits \fIovector\fP Points to a vector of ints for result offsets \fIovecsize\fP Number of elements in the vector \fIworkspace\fP Points to a vector of ints used as working space \fIwscount\fP Number of elements in the vector .sp The units for \fIlength\fP and \fIstartoffset\fP are bytes for \fBpcre_exec()\fP, 16-bit data items for \fBpcre16_exec()\fP, and 32-bit items for \fBpcre32_exec()\fP. The options are: .sp PCRE_ANCHORED Match only at the first position PCRE_BSR_ANYCRLF \eR matches only CR, LF, or CRLF PCRE_BSR_UNICODE \eR matches all Unicode line endings PCRE_NEWLINE_ANY Recognize any Unicode newline sequence PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences PCRE_NEWLINE_CR Recognize CR as the only newline sequence PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence PCRE_NEWLINE_LF Recognize LF as the only newline sequence PCRE_NOTBOL Subject is not the beginning of a line PCRE_NOTEOL Subject is not the end of a line PCRE_NOTEMPTY An empty string is not a valid match PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject is not a valid match PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations PCRE_NO_UTF16_CHECK Do not check the subject for UTF-16 validity (only relevant if PCRE_UTF16 was set at compile time) PCRE_NO_UTF32_CHECK Do not check the subject for UTF-32 validity (only relevant if PCRE_UTF32 was set at compile time) PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8 validity (only relevant if PCRE_UTF8 was set at compile time) PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial PCRE_PARTIAL_SOFT ) match if no full matches are found PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match even if there is a full match as well PCRE_DFA_SHORTEST Return only the shortest match PCRE_DFA_RESTART Restart after a partial match .sp There are restrictions on what may appear in a pattern when using this matching function. Details are given in the .\" HREF \fBpcrematching\fP .\" documentation. For details of partial matching, see the .\" HREF \fBpcrepartial\fP .\" page. .P A \fBpcre[16|32]_extra\fP structure contains the following fields: .sp \fIflags\fP Bits indicating which fields are set \fIstudy_data\fP Opaque data from \fBpcre[16|32]_study()\fP \fImatch_limit\fP Limit on internal resource use \fImatch_limit_recursion\fP Limit on internal recursion depth \fIcallout_data\fP Opaque data passed back to callouts \fItables\fP Points to character tables or is NULL \fImark\fP For passing back a *MARK pointer \fIexecutable_jit\fP Opaque data from JIT compilation .sp The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT, PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA, PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT. For this matching function, the \fImatch_limit\fP and \fImatch_limit_recursion\fP fields are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and the corresponding variable are ignored. .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.
