Annotation of embedaddon/pcre/doc/html/pcresample.html, revision 1.1.1.2
1.1 misho 1: <html>
2: <head>
3: <title>pcresample specification</title>
4: </head>
5: <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
6: <h1>pcresample 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: PCRE SAMPLE PROGRAM
17: </b><br>
18: <P>
19: A simple, complete demonstration program, to get you started with using PCRE,
20: is supplied in the file <i>pcredemo.c</i> in the PCRE distribution. A listing of
21: this program is given in the
22: <a href="pcredemo.html"><b>pcredemo</b></a>
23: documentation. If you do not have a copy of the PCRE distribution, you can save
24: this listing to re-create <i>pcredemo.c</i>.
25: </P>
26: <P>
1.1.1.2 ! misho 27: The demonstration program, which uses the original PCRE 8-bit library, compiles
! 28: the regular expression that is its first argument, and matches it against the
! 29: subject string in its second argument. No PCRE options are set, and default
! 30: character tables are used. If matching succeeds, the program outputs the
! 31: portion of the subject that matched, together with the contents of any captured
! 32: substrings.
1.1 misho 33: </P>
34: <P>
35: If the -g option is given on the command line, the program then goes on to
36: check for further matches of the same regular expression in the same subject
37: string. The logic is a little bit tricky because of the possibility of matching
38: an empty string. Comments in the code explain what is going on.
39: </P>
40: <P>
41: If PCRE is installed in the standard include and library directories for your
42: operating system, you should be able to compile the demonstration program using
43: this command:
44: <pre>
45: gcc -o pcredemo pcredemo.c -lpcre
46: </pre>
47: If PCRE is installed elsewhere, you may need to add additional options to the
48: command line. For example, on a Unix-like system that has PCRE installed in
49: <i>/usr/local</i>, you can compile the demonstration program using a command
50: like this:
51: <pre>
52: gcc -o pcredemo -I/usr/local/include pcredemo.c -L/usr/local/lib -lpcre
53: </pre>
54: In a Windows environment, if you want to statically link the program against a
55: non-dll <b>pcre.a</b> file, you must uncomment the line that defines PCRE_STATIC
56: before including <b>pcre.h</b>, because otherwise the <b>pcre_malloc()</b> and
57: <b>pcre_free()</b> exported functions will be declared
58: <b>__declspec(dllimport)</b>, with unwanted results.
59: </P>
60: <P>
61: Once you have compiled and linked the demonstration program, you can run simple
62: tests like this:
63: <pre>
64: ./pcredemo 'cat|dog' 'the cat sat on the mat'
65: ./pcredemo -g 'cat|dog' 'the dog sat on the cat'
66: </pre>
67: Note that there is a much more comprehensive test program, called
68: <a href="pcretest.html"><b>pcretest</b>,</a>
1.1.1.2 ! misho 69: which supports many more facilities for testing regular expressions and both
! 70: PCRE libraries. The
1.1 misho 71: <a href="pcredemo.html"><b>pcredemo</b></a>
72: program is provided as a simple coding example.
73: </P>
74: <P>
75: If you try to run
76: <a href="pcredemo.html"><b>pcredemo</b></a>
77: when PCRE is not installed in the standard library directory, you may get an
78: error like this on some operating systems (e.g. Solaris):
79: <pre>
80: ld.so.1: a.out: fatal: libpcre.so.0: open failed: No such file or directory
81: </pre>
82: This is caused by the way shared library support works on those systems. You
83: need to add
84: <pre>
85: -R/usr/local/lib
86: </pre>
87: (for example) to the compile command to get round this problem.
88: </P>
89: <br><b>
90: AUTHOR
91: </b><br>
92: <P>
93: Philip Hazel
94: <br>
95: University Computing Service
96: <br>
97: Cambridge CB2 3QH, England.
98: <br>
99: </P>
100: <br><b>
101: REVISION
102: </b><br>
103: <P>
1.1.1.2 ! misho 104: Last updated: 10 January 2012
1.1 misho 105: <br>
1.1.1.2 ! misho 106: Copyright © 1997-2012 University of Cambridge.
1.1 misho 107: <br>
108: <p>
109: Return to the <a href="index.html">PCRE index page</a>.
110: </p>
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