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1.1 ! misho 1: <html> ! 2: <head> ! 3: <title>pcre_dfa_exec specification</title> ! 4: </head> ! 5: <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> ! 6: <h1>pcre_dfa_exec man page</h1> ! 7: <p> ! 8: Return to the <a href="index.html">PCRE index page</a>. ! 9: </p> ! 10: <p> ! 11: This page is part of the PCRE HTML documentation. It was generated automatically ! 12: from the original man page. If there is any nonsense in it, please consult the ! 13: man page, in case the conversion went wrong. ! 14: <br> ! 15: <br><b> ! 16: SYNOPSIS ! 17: </b><br> ! 18: <P> ! 19: <b>#include <pcre.h></b> ! 20: </P> ! 21: <P> ! 22: <b>int pcre_dfa_exec(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b> ! 23: <b>const char *<i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b> ! 24: <b>int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>,</b> ! 25: <b>int *<i>workspace</i>, int <i>wscount</i>);</b> ! 26: </P> ! 27: <br><b> ! 28: DESCRIPTION ! 29: </b><br> ! 30: <P> ! 31: This function matches a compiled regular expression against a given subject ! 32: string, using an alternative matching algorithm that scans the subject string ! 33: just once (<i>not</i> Perl-compatible). Note that the main, Perl-compatible, ! 34: matching function is <b>pcre_exec()</b>. The arguments for this function are: ! 35: <pre> ! 36: <i>code</i> Points to the compiled pattern ! 37: <i>extra</i> Points to an associated <b>pcre_extra</b> structure, ! 38: or is NULL ! 39: <i>subject</i> Points to the subject string ! 40: <i>length</i> Length of the subject string, in bytes ! 41: <i>startoffset</i> Offset in bytes in the subject at which to ! 42: start matching ! 43: <i>options</i> Option bits ! 44: <i>ovector</i> Points to a vector of ints for result offsets ! 45: <i>ovecsize</i> Number of elements in the vector ! 46: <i>workspace</i> Points to a vector of ints used as working space ! 47: <i>wscount</i> Number of elements in the vector ! 48: </pre> ! 49: The options are: ! 50: <pre> ! 51: PCRE_ANCHORED Match only at the first position ! 52: PCRE_BSR_ANYCRLF \R matches only CR, LF, or CRLF ! 53: PCRE_BSR_UNICODE \R matches all Unicode line endings ! 54: PCRE_NEWLINE_ANY Recognize any Unicode newline sequence ! 55: PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences ! 56: PCRE_NEWLINE_CR Recognize CR as the only newline sequence ! 57: PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence ! 58: PCRE_NEWLINE_LF Recognize LF as the only newline sequence ! 59: PCRE_NOTBOL Subject is not the beginning of a line ! 60: PCRE_NOTEOL Subject is not the end of a line ! 61: PCRE_NOTEMPTY An empty string is not a valid match ! 62: PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject ! 63: is not a valid match ! 64: PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations ! 65: PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8 ! 66: validity (only relevant if PCRE_UTF8 ! 67: was set at compile time) ! 68: PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial ! 69: PCRE_PARTIAL_SOFT ) match if no full matches are found ! 70: PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match ! 71: even if there is a full match as well ! 72: PCRE_DFA_SHORTEST Return only the shortest match ! 73: PCRE_DFA_RESTART Restart after a partial match ! 74: </pre> ! 75: There are restrictions on what may appear in a pattern when using this matching ! 76: function. Details are given in the ! 77: <a href="pcrematching.html"><b>pcrematching</b></a> ! 78: documentation. For details of partial matching, see the ! 79: <a href="pcrepartial.html"><b>pcrepartial</b></a> ! 80: page. ! 81: </P> ! 82: <P> ! 83: A <b>pcre_extra</b> structure contains the following fields: ! 84: <pre> ! 85: <i>flags</i> Bits indicating which fields are set ! 86: <i>study_data</i> Opaque data from <b>pcre_study()</b> ! 87: <i>match_limit</i> Limit on internal resource use ! 88: <i>match_limit_recursion</i> Limit on internal recursion depth ! 89: <i>callout_data</i> Opaque data passed back to callouts ! 90: <i>tables</i> Points to character tables or is NULL ! 91: <i>mark</i> For passing back a *MARK pointer ! 92: <i>executable_jit</i> Opaque data from JIT compilation ! 93: </pre> ! 94: The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT, ! 95: PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA, ! 96: PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT. For this ! 97: matching function, the <i>match_limit</i> and <i>match_limit_recursion</i> fields ! 98: are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and ! 99: the corresponding variable are ignored. ! 100: </P> ! 101: <P> ! 102: There is a complete description of the PCRE native API in the ! 103: <a href="pcreapi.html"><b>pcreapi</b></a> ! 104: page and a description of the POSIX API in the ! 105: <a href="pcreposix.html"><b>pcreposix</b></a> ! 106: page. ! 107: <p> ! 108: Return to the <a href="index.html">PCRE index page</a>. ! 109: </p>