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 <br> 27 <br> 28 <b>int pcre16_dfa_exec(const pcre16 *<i>code</i>, const pcre16_extra *<i>extra</i>,</b> 29 <b> PCRE_SPTR16 <i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b> 30 <b> int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>,</b> 31 <b> int *<i>workspace</i>, int <i>wscount</i>);</b> 32 <br> 33 <br> 34 <b>int pcre32_dfa_exec(const pcre32 *<i>code</i>, const pcre32_extra *<i>extra</i>,</b> 35 <b> PCRE_SPTR32 <i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b> 36 <b> int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>,</b> 37 <b> int *<i>workspace</i>, int <i>wscount</i>);</b> 38 </P> 39 <br><b> 40 DESCRIPTION 41 </b><br> 42 <P> 43 This function matches a compiled regular expression against a given subject 44 string, using an alternative matching algorithm that scans the subject string 45 just once (<i>not</i> Perl-compatible). Note that the main, Perl-compatible, 46 matching function is <b>pcre[16|32]_exec()</b>. The arguments for this function 47 are: 48 <pre> 49 <i>code</i> Points to the compiled pattern 50 <i>extra</i> Points to an associated <b>pcre[16|32]_extra</b> structure, 51 or is NULL 52 <i>subject</i> Points to the subject string 53 <i>length</i> Length of the subject string 54 <i>startoffset</i> Offset in the subject at which to start matching 55 <i>options</i> Option bits 56 <i>ovector</i> Points to a vector of ints for result offsets 57 <i>ovecsize</i> Number of elements in the vector 58 <i>workspace</i> Points to a vector of ints used as working space 59 <i>wscount</i> Number of elements in the vector 60 </pre> 61 The units for <i>length</i> and <i>startoffset</i> are bytes for 62 <b>pcre_exec()</b>, 16-bit data items for <b>pcre16_exec()</b>, and 32-bit items 63 for <b>pcre32_exec()</b>. The options are: 64 <pre> 65 PCRE_ANCHORED Match only at the first position 66 PCRE_BSR_ANYCRLF \R matches only CR, LF, or CRLF 67 PCRE_BSR_UNICODE \R matches all Unicode line endings 68 PCRE_NEWLINE_ANY Recognize any Unicode newline sequence 69 PCRE_NEWLINE_ANYCRLF Recognize CR, LF, & CRLF as newline sequences 70 PCRE_NEWLINE_CR Recognize CR as the only newline sequence 71 PCRE_NEWLINE_CRLF Recognize CRLF as the only newline sequence 72 PCRE_NEWLINE_LF Recognize LF as the only newline sequence 73 PCRE_NOTBOL Subject is not the beginning of a line 74 PCRE_NOTEOL Subject is not the end of a line 75 PCRE_NOTEMPTY An empty string is not a valid match 76 PCRE_NOTEMPTY_ATSTART An empty string at the start of the subject 77 is not a valid match 78 PCRE_NO_START_OPTIMIZE Do not do "start-match" optimizations 79 PCRE_NO_UTF16_CHECK Do not check the subject for UTF-16 80 validity (only relevant if PCRE_UTF16 81 was set at compile time) 82 PCRE_NO_UTF32_CHECK Do not check the subject for UTF-32 83 validity (only relevant if PCRE_UTF32 84 was set at compile time) 85 PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8 86 validity (only relevant if PCRE_UTF8 87 was set at compile time) 88 PCRE_PARTIAL ) Return PCRE_ERROR_PARTIAL for a partial 89 PCRE_PARTIAL_SOFT ) match if no full matches are found 90 PCRE_PARTIAL_HARD Return PCRE_ERROR_PARTIAL for a partial match 91 even if there is a full match as well 92 PCRE_DFA_SHORTEST Return only the shortest match 93 PCRE_DFA_RESTART Restart after a partial match 94 </pre> 95 There are restrictions on what may appear in a pattern when using this matching 96 function. Details are given in the 97 <a href="pcrematching.html"><b>pcrematching</b></a> 98 documentation. For details of partial matching, see the 99 <a href="pcrepartial.html"><b>pcrepartial</b></a> 100 page. 101 </P> 102 <P> 103 A <b>pcre[16|32]_extra</b> structure contains the following fields: 104 <pre> 105 <i>flags</i> Bits indicating which fields are set 106 <i>study_data</i> Opaque data from <b>pcre[16|32]_study()</b> 107 <i>match_limit</i> Limit on internal resource use 108 <i>match_limit_recursion</i> Limit on internal recursion depth 109 <i>callout_data</i> Opaque data passed back to callouts 110 <i>tables</i> Points to character tables or is NULL 111 <i>mark</i> For passing back a *MARK pointer 112 <i>executable_jit</i> Opaque data from JIT compilation 113 </pre> 114 The flag bits are PCRE_EXTRA_STUDY_DATA, PCRE_EXTRA_MATCH_LIMIT, 115 PCRE_EXTRA_MATCH_LIMIT_RECURSION, PCRE_EXTRA_CALLOUT_DATA, 116 PCRE_EXTRA_TABLES, PCRE_EXTRA_MARK and PCRE_EXTRA_EXECUTABLE_JIT. For this 117 matching function, the <i>match_limit</i> and <i>match_limit_recursion</i> fields 118 are not used, and must not be set. The PCRE_EXTRA_EXECUTABLE_JIT flag and 119 the corresponding variable are ignored. 120 </P> 121 <P> 122 There is a complete description of the PCRE native API in the 123 <a href="pcreapi.html"><b>pcreapi</b></a> 124 page and a description of the POSIX API in the 125 <a href="pcreposix.html"><b>pcreposix</b></a> 126 page. 127 <p> 128 Return to the <a href="index.html">PCRE index page</a>. 129 </p> 130
