1: /*************************************************
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: Copyright (c) 1997-2011 University of Cambridge
10:
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_fullinfo(), which returns
42: information about a compiled pattern. */
43:
44:
45: #ifdef HAVE_CONFIG_H
46: #include "config.h"
47: #endif
48:
49: #include "pcre_internal.h"
50:
51:
52: /*************************************************
53: * Return info about compiled pattern *
54: *************************************************/
55:
56: /* This is a newer "info" function which has an extensible interface so
57: that additional items can be added compatibly.
58:
59: Arguments:
60: argument_re points to compiled code
61: extra_data points extra data, or NULL
62: what what information is required
63: where where to put the information
64:
65: Returns: 0 if data returned, negative on error
66: */
67:
68: PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
69: pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
70: void *where)
71: {
72: real_pcre internal_re;
73: pcre_study_data internal_study;
74: const real_pcre *re = (const real_pcre *)argument_re;
75: const pcre_study_data *study = NULL;
76:
77: if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
78:
79: if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
80: study = (const pcre_study_data *)extra_data->study_data;
81:
82: if (re->magic_number != MAGIC_NUMBER)
83: {
84: re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
85: if (re == NULL) return PCRE_ERROR_BADMAGIC;
86: if (study != NULL) study = &internal_study;
87: }
88:
89: switch (what)
90: {
91: case PCRE_INFO_OPTIONS:
92: *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
93: break;
94:
95: case PCRE_INFO_SIZE:
96: *((size_t *)where) = re->size;
97: break;
98:
99: case PCRE_INFO_STUDYSIZE:
100: *((size_t *)where) = (study == NULL)? 0 : study->size;
101: break;
102:
103: case PCRE_INFO_JITSIZE:
104: #ifdef SUPPORT_JIT
105: *((size_t *)where) =
106: (extra_data != NULL &&
107: (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
108: extra_data->executable_jit != NULL)?
109: _pcre_jit_get_size(extra_data->executable_jit) : 0;
110: #else
111: *((size_t *)where) = 0;
112: #endif
113:
114: break;
115:
116: case PCRE_INFO_CAPTURECOUNT:
117: *((int *)where) = re->top_bracket;
118: break;
119:
120: case PCRE_INFO_BACKREFMAX:
121: *((int *)where) = re->top_backref;
122: break;
123:
124: case PCRE_INFO_FIRSTBYTE:
125: *((int *)where) =
126: ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte :
127: ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
128: break;
129:
130: /* Make sure we pass back the pointer to the bit vector in the external
131: block, not the internal copy (with flipped integer fields). */
132:
133: case PCRE_INFO_FIRSTTABLE:
134: *((const uschar **)where) =
135: (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
136: ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
137: break;
138:
139: case PCRE_INFO_MINLENGTH:
140: *((int *)where) =
141: (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
142: study->minlength : -1;
143: break;
144:
145: case PCRE_INFO_JIT:
146: *((int *)where) = extra_data != NULL &&
147: (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
148: extra_data->executable_jit != NULL;
149: break;
150:
151: case PCRE_INFO_LASTLITERAL:
152: *((int *)where) =
153: ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
154: break;
155:
156: case PCRE_INFO_NAMEENTRYSIZE:
157: *((int *)where) = re->name_entry_size;
158: break;
159:
160: case PCRE_INFO_NAMECOUNT:
161: *((int *)where) = re->name_count;
162: break;
163:
164: case PCRE_INFO_NAMETABLE:
165: *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
166: break;
167:
168: case PCRE_INFO_DEFAULT_TABLES:
169: *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
170: break;
171:
172: /* From release 8.00 this will always return TRUE because NOPARTIAL is
173: no longer ever set (the restrictions have been removed). */
174:
175: case PCRE_INFO_OKPARTIAL:
176: *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
177: break;
178:
179: case PCRE_INFO_JCHANGED:
180: *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
181: break;
182:
183: case PCRE_INFO_HASCRORLF:
184: *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
185: break;
186:
187: default: return PCRE_ERROR_BADOPTION;
188: }
189:
190: return 0;
191: }
192:
193: /* End of pcre_fullinfo.c */
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