/[pcre]/code/trunk/pcre_info.c
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Revision 117 - (hide annotations) (download)
Fri Mar 9 15:59:06 2007 UTC (7 years, 5 months ago) by ph10
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Update copyright years to 2007.

1 nigel 77 /*************************************************
2     * Perl-Compatible Regular Expressions *
3     *************************************************/
4    
5     /* PCRE is a library of functions to support regular expressions whose syntax
6     and semantics are as close as possible to those of the Perl 5 language.
7    
8     Written by Philip Hazel
9 ph10 117 Copyright (c) 1997-2007 University of Cambridge
10 nigel 77
11     -----------------------------------------------------------------------------
12     Redistribution and use in source and binary forms, with or without
13     modification, are permitted provided that the following conditions are met:
14    
15     * Redistributions of source code must retain the above copyright notice,
16     this list of conditions and the following disclaimer.
17    
18     * Redistributions in binary form must reproduce the above copyright
19     notice, this list of conditions and the following disclaimer in the
20     documentation and/or other materials provided with the distribution.
21    
22     * Neither the name of the University of Cambridge nor the names of its
23     contributors may be used to endorse or promote products derived from
24     this software without specific prior written permission.
25    
26     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27     AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29     ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30     LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36     POSSIBILITY OF SUCH DAMAGE.
37     -----------------------------------------------------------------------------
38     */
39    
40    
41     /* This module contains the external function pcre_info(), which gives some
42     information about a compiled pattern. However, use of this function is now
43     deprecated, as it has been superseded by pcre_fullinfo(). */
44    
45    
46     #include "pcre_internal.h"
47    
48    
49     /*************************************************
50     * (Obsolete) Return info about compiled pattern *
51     *************************************************/
52    
53     /* This is the original "info" function. It picks potentially useful data out
54     of the private structure, but its interface was too rigid. It remains for
55     backwards compatibility. The public options are passed back in an int - though
56     the re->options field has been expanded to a long int, all the public options
57     at the low end of it, and so even on 16-bit systems this will still be OK.
58     Therefore, I haven't changed the API for pcre_info().
59    
60     Arguments:
61     argument_re points to compiled code
62     optptr where to pass back the options
63     first_byte where to pass back the first character,
64     or -1 if multiline and all branches start ^,
65     or -2 otherwise
66    
67     Returns: number of capturing subpatterns
68     or negative values on error
69     */
70    
71 nigel 87 PCRE_DATA_SCOPE int
72 nigel 77 pcre_info(const pcre *argument_re, int *optptr, int *first_byte)
73     {
74     real_pcre internal_re;
75     const real_pcre *re = (const real_pcre *)argument_re;
76     if (re == NULL) return PCRE_ERROR_NULL;
77     if (re->magic_number != MAGIC_NUMBER)
78     {
79     re = _pcre_try_flipped(re, &internal_re, NULL, NULL);
80     if (re == NULL) return PCRE_ERROR_BADMAGIC;
81     }
82     if (optptr != NULL) *optptr = (int)(re->options & PUBLIC_OPTIONS);
83     if (first_byte != NULL)
84     *first_byte = ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
85     ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
86     return re->top_bracket;
87     }
88    
89     /* End of pcre_info.c */

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