| .TH PCRE_DFA_EXEC 3 |
| .SH NAME |
| PCRE - Perl-compatible regular expressions |
| .SH SYNOPSIS |
| .rs |
| .sp |
| .B #include <pcre.h> |
| .PP |
| .SM |
| .B int pcre_dfa_exec(const pcre *\fIcode\fP, "const pcre_extra *\fIextra\fP," |
| .ti +5n |
| .B "const char *\fIsubject\fP," int \fIlength\fP, int \fIstartoffset\fP, |
| .ti +5n |
| .B int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP, |
| .ti +5n |
| .B int *\fIworkspace\fP, int \fIwscount\fP); |
| . |
| .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_exec()\fP. The arguments for this function are: |
| .sp |
| \fIcode\fP Points to the compiled pattern |
| \fIextra\fP Points to an associated \fBpcre_extra\fP structure, |
| or is NULL |
| \fIsubject\fP Points to the subject string |
| \fIlength\fP Length of the subject string, in bytes |
| \fIstartoffset\fP Offset in bytes 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 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_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_extra\fP structure contains the following fields: |
| .sp |
| \fIflags\fP Bits indicating which fields are set |
| \fIstudy_data\fP Opaque data from \fBpcre_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. |