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Annotation of embedaddon/pcre/doc/pcre_dfa_exec.3, revision 1.1.1.4

1.1.1.4 ! misho       1: .TH PCRE_DFA_EXEC 3 "12 May 2013" "PCRE 8.33"
1.1       misho       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 int pcre_dfa_exec(const pcre *\fIcode\fP, "const pcre_extra *\fIextra\fP,"
                     11: .ti +5n
                     12: .B "const char *\fIsubject\fP," int \fIlength\fP, int \fIstartoffset\fP,
                     13: .ti +5n
                     14: .B int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,
                     15: .ti +5n
                     16: .B int *\fIworkspace\fP, int \fIwscount\fP);
1.1.1.2   misho      17: .PP
                     18: .B int pcre16_dfa_exec(const pcre16 *\fIcode\fP, "const pcre16_extra *\fIextra\fP,"
                     19: .ti +5n
                     20: .B "PCRE_SPTR16 \fIsubject\fP," int \fIlength\fP, int \fIstartoffset\fP,
                     21: .ti +5n
                     22: .B int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,
                     23: .ti +5n
                     24: .B int *\fIworkspace\fP, int \fIwscount\fP);
1.1.1.4 ! misho      25: .PP
        !            26: .B int pcre32_dfa_exec(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP,"
        !            27: .ti +5n
        !            28: .B "PCRE_SPTR32 \fIsubject\fP," int \fIlength\fP, int \fIstartoffset\fP,
        !            29: .ti +5n
        !            30: .B int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,
        !            31: .ti +5n
        !            32: .B int *\fIworkspace\fP, int \fIwscount\fP);
1.1       misho      33: .
                     34: .SH DESCRIPTION
                     35: .rs
                     36: .sp
                     37: This function matches a compiled regular expression against a given subject
                     38: string, using an alternative matching algorithm that scans the subject string
                     39: just once (\fInot\fP Perl-compatible). Note that the main, Perl-compatible,
1.1.1.4 ! misho      40: matching function is \fBpcre[16|32]_exec()\fP. The arguments for this function
1.1.1.2   misho      41: are:
1.1       misho      42: .sp
                     43:   \fIcode\fP         Points to the compiled pattern
1.1.1.4 ! misho      44:   \fIextra\fP        Points to an associated \fBpcre[16|32]_extra\fP structure,
1.1       misho      45:                  or is NULL
                     46:   \fIsubject\fP      Points to the subject string
1.1.1.4 ! misho      47:   \fIlength\fP       Length of the subject string
        !            48:   \fIstartoffset\fP  Offset in the subject at which to start matching
1.1       misho      49:   \fIoptions\fP      Option bits
                     50:   \fIovector\fP      Points to a vector of ints for result offsets
                     51:   \fIovecsize\fP     Number of elements in the vector
                     52:   \fIworkspace\fP    Points to a vector of ints used as working space
                     53:   \fIwscount\fP      Number of elements in the vector
                     54: .sp
1.1.1.4 ! misho      55: The units for \fIlength\fP and \fIstartoffset\fP are bytes for
        !            56: \fBpcre_exec()\fP, 16-bit data items for \fBpcre16_exec()\fP, and 32-bit items
        !            57: for \fBpcre32_exec()\fP. The options are:
1.1       misho      58: .sp
                     59:   PCRE_ANCHORED          Match only at the first position
                     60:   PCRE_BSR_ANYCRLF       \eR matches only CR, LF, or CRLF
                     61:   PCRE_BSR_UNICODE       \eR matches all Unicode line endings
                     62:   PCRE_NEWLINE_ANY       Recognize any Unicode newline sequence
                     63:   PCRE_NEWLINE_ANYCRLF   Recognize CR, LF, & CRLF as newline sequences
                     64:   PCRE_NEWLINE_CR        Recognize CR as the only newline sequence
                     65:   PCRE_NEWLINE_CRLF      Recognize CRLF as the only newline sequence
                     66:   PCRE_NEWLINE_LF        Recognize LF as the only newline sequence
                     67:   PCRE_NOTBOL            Subject is not the beginning of a line
                     68:   PCRE_NOTEOL            Subject is not the end of a line
                     69:   PCRE_NOTEMPTY          An empty string is not a valid match
                     70:   PCRE_NOTEMPTY_ATSTART  An empty string at the start of the subject
                     71:                            is not a valid match
                     72:   PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations
1.1.1.2   misho      73:   PCRE_NO_UTF16_CHECK    Do not check the subject for UTF-16
                     74:                            validity (only relevant if PCRE_UTF16
                     75:                            was set at compile time)
1.1.1.4 ! misho      76:   PCRE_NO_UTF32_CHECK    Do not check the subject for UTF-32
        !            77:                            validity (only relevant if PCRE_UTF32
        !            78:                            was set at compile time)
1.1       misho      79:   PCRE_NO_UTF8_CHECK     Do not check the subject for UTF-8
                     80:                            validity (only relevant if PCRE_UTF8
                     81:                            was set at compile time)
                     82:   PCRE_PARTIAL           ) Return PCRE_ERROR_PARTIAL for a partial
                     83:   PCRE_PARTIAL_SOFT      )   match if no full matches are found
                     84:   PCRE_PARTIAL_HARD      Return PCRE_ERROR_PARTIAL for a partial match
                     85:                            even if there is a full match as well
                     86:   PCRE_DFA_SHORTEST      Return only the shortest match
                     87:   PCRE_DFA_RESTART       Restart after a partial match
                     88: .sp
                     89: There are restrictions on what may appear in a pattern when using this matching
                     90: function. Details are given in the
                     91: .\" HREF
                     92: \fBpcrematching\fP
                     93: .\"
                     94: documentation. For details of partial matching, see the
                     95: .\" HREF
                     96: \fBpcrepartial\fP
                     97: .\"
                     98: page.
                     99: .P
1.1.1.4 ! misho     100: A \fBpcre[16|32]_extra\fP structure contains the following fields:
1.1       misho     101: .sp
                    102:   \fIflags\fP            Bits indicating which fields are set
1.1.1.4 ! misho     103:   \fIstudy_data\fP       Opaque data from \fBpcre[16|32]_study()\fP
1.1       misho     104:   \fImatch_limit\fP      Limit on internal resource use
                    105:   \fImatch_limit_recursion\fP  Limit on internal recursion depth
                    106:   \fIcallout_data\fP     Opaque data passed back to callouts
                    107:   \fItables\fP           Points to character tables or is NULL
                    108:   \fImark\fP             For passing back a *MARK pointer
                    109:   \fIexecutable_jit\fP   Opaque data from JIT compilation
                    110: .sp
                    111: The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT,
                    112: PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA,
                    113: PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT. For this
                    114: matching function, the \fImatch_limit\fP and \fImatch_limit_recursion\fP fields
                    115: are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and
                    116: the corresponding variable are ignored.
                    117: .P
                    118: There is a complete description of the PCRE native API in the
                    119: .\" HREF
                    120: \fBpcreapi\fP
                    121: .\"
                    122: page and a description of the POSIX API in the
                    123: .\" HREF
                    124: \fBpcreposix\fP
                    125: .\"
                    126: page.