| 1 |
/*************************************************
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| 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) 1997-2007 University of Cambridge
|
| 10 |
|
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
|
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
|
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this list of conditions and the following disclaimer.
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* 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 |
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| 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
|
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 28 |
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
|
| 39 |
|
| 40 |
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/* This module contains a PCRE private debugging function for printing out the
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internal form of a compiled regular expression, along with some supporting
|
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local functions. This source file is used in two places:
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| 44 |
|
| 45 |
(1) It is #included by pcre_compile.c when it is compiled in debugging mode
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| 46 |
(DEBUG defined in pcre_internal.h). It is not included in production compiles.
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| 47 |
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| 48 |
(2) It is always #included by pcretest.c, which can be asked to print out a
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compiled regex for debugging purposes. */
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|
| 51 |
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/* Macro that decides whether a character should be output as a literal or in
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| 53 |
hexadecimal. We don't use isprint() because that can vary from system to system
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(even without the use of locales) and we want the output always to be the same,
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for testing purposes. This macro is used in pcretest as well as in this file. */
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| 56 |
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| 57 |
#define PRINTABLE(c) ((c) >= 32 && (c) < 127)
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| 58 |
|
| 59 |
/* The table of operator names. */
|
| 60 |
|
| 61 |
static const char *OP_names[] = { OP_NAME_LIST };
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|
| 63 |
|
| 64 |
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| 65 |
/*************************************************
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* Print single- or multi-byte character *
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| 67 |
*************************************************/
|
| 68 |
|
| 69 |
static int
|
| 70 |
print_char(FILE *f, uschar *ptr, BOOL utf8)
|
| 71 |
{
|
| 72 |
int c = *ptr;
|
| 73 |
|
| 74 |
#ifndef SUPPORT_UTF8
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utf8 = utf8; /* Avoid compiler warning */
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| 76 |
if (PRINTABLE(c)) fprintf(f, "%c", c); else fprintf(f, "\\x%02x", c);
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return 0;
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| 78 |
|
| 79 |
#else
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if (!utf8 || (c & 0xc0) != 0xc0)
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{
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| 82 |
if (PRINTABLE(c)) fprintf(f, "%c", c); else fprintf(f, "\\x%02x", c);
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return 0;
|
| 84 |
}
|
| 85 |
else
|
| 86 |
{
|
| 87 |
int i;
|
| 88 |
int a = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */
|
| 89 |
int s = 6*a;
|
| 90 |
c = (c & _pcre_utf8_table3[a]) << s;
|
| 91 |
for (i = 1; i <= a; i++)
|
| 92 |
{
|
| 93 |
/* This is a check for malformed UTF-8; it should only occur if the sanity
|
| 94 |
check has been turned off. Rather than swallow random bytes, just stop if
|
| 95 |
we hit a bad one. Print it with \X instead of \x as an indication. */
|
| 96 |
|
| 97 |
if ((ptr[i] & 0xc0) != 0x80)
|
| 98 |
{
|
| 99 |
fprintf(f, "\\X{%x}", c);
|
| 100 |
return i - 1;
|
| 101 |
}
|
| 102 |
|
| 103 |
/* The byte is OK */
|
| 104 |
|
| 105 |
s -= 6;
|
| 106 |
c |= (ptr[i] & 0x3f) << s;
|
| 107 |
}
|
| 108 |
if (c < 128) fprintf(f, "\\x%02x", c); else fprintf(f, "\\x{%x}", c);
|
| 109 |
return a;
|
| 110 |
}
|
| 111 |
#endif
|
| 112 |
}
|
| 113 |
|
| 114 |
|
| 115 |
|
| 116 |
/*************************************************
|
| 117 |
* Find Unicode property name *
|
| 118 |
*************************************************/
|
| 119 |
|
| 120 |
static const char *
|
| 121 |
get_ucpname(int ptype, int pvalue)
|
| 122 |
{
|
| 123 |
#ifdef SUPPORT_UCP
|
| 124 |
int i;
|
| 125 |
for (i = _pcre_utt_size - 1; i >= 0; i--)
|
| 126 |
{
|
| 127 |
if (ptype == _pcre_utt[i].type && pvalue == _pcre_utt[i].value) break;
|
| 128 |
}
|
| 129 |
return (i >= 0)? _pcre_utt_names + _pcre_utt[i].name_offset : "??";
|
| 130 |
#else
|
| 131 |
/* It gets harder and harder to shut off unwanted compiler warnings. */
|
| 132 |
ptype = ptype * pvalue;
|
| 133 |
return (ptype == pvalue)? "??" : "??";
|
| 134 |
#endif
|
| 135 |
}
|
| 136 |
|
| 137 |
|
| 138 |
|
| 139 |
/*************************************************
|
| 140 |
* Print compiled regex *
|
| 141 |
*************************************************/
|
| 142 |
|
| 143 |
/* Make this function work for a regex with integers either byte order.
|
| 144 |
However, we assume that what we are passed is a compiled regex. The
|
| 145 |
print_lengths flag controls whether offsets and lengths of items are printed.
|
| 146 |
They can be turned off from pcretest so that automatic tests on bytecode can be
|
| 147 |
written that do not depend on the value of LINK_SIZE. */
|
| 148 |
|
| 149 |
static void
|
| 150 |
pcre_printint(pcre *external_re, FILE *f, BOOL print_lengths)
|
| 151 |
{
|
| 152 |
real_pcre *re = (real_pcre *)external_re;
|
| 153 |
uschar *codestart, *code;
|
| 154 |
BOOL utf8;
|
| 155 |
|
| 156 |
unsigned int options = re->options;
|
| 157 |
int offset = re->name_table_offset;
|
| 158 |
int count = re->name_count;
|
| 159 |
int size = re->name_entry_size;
|
| 160 |
|
| 161 |
if (re->magic_number != MAGIC_NUMBER)
|
| 162 |
{
|
| 163 |
offset = ((offset << 8) & 0xff00) | ((offset >> 8) & 0xff);
|
| 164 |
count = ((count << 8) & 0xff00) | ((count >> 8) & 0xff);
|
| 165 |
size = ((size << 8) & 0xff00) | ((size >> 8) & 0xff);
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options = ((options << 24) & 0xff000000) |
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((options << 8) & 0x00ff0000) |
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((options >> 8) & 0x0000ff00) |
|
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((options >> 24) & 0x000000ff);
|
| 170 |
}
|
| 171 |
|
| 172 |
code = codestart = (uschar *)re + offset + count * size;
|
| 173 |
utf8 = (options & PCRE_UTF8) != 0;
|
| 174 |
|
| 175 |
for(;;)
|
| 176 |
{
|
| 177 |
uschar *ccode;
|
| 178 |
int c;
|
| 179 |
int extra = 0;
|
| 180 |
|
| 181 |
if (print_lengths)
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| 182 |
fprintf(f, "%3d ", (int)(code - codestart));
|
| 183 |
else
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| 184 |
fprintf(f, " ");
|
| 185 |
|
| 186 |
switch(*code)
|
| 187 |
{
|
| 188 |
case OP_END:
|
| 189 |
fprintf(f, " %s\n", OP_names[*code]);
|
| 190 |
fprintf(f, "------------------------------------------------------------------\n");
|
| 191 |
return;
|
| 192 |
|
| 193 |
case OP_OPT:
|
| 194 |
fprintf(f, " %.2x %s", code[1], OP_names[*code]);
|
| 195 |
break;
|
| 196 |
|
| 197 |
case OP_CHAR:
|
| 198 |
fprintf(f, " ");
|
| 199 |
do
|
| 200 |
{
|
| 201 |
code++;
|
| 202 |
code += 1 + print_char(f, code, utf8);
|
| 203 |
}
|
| 204 |
while (*code == OP_CHAR);
|
| 205 |
fprintf(f, "\n");
|
| 206 |
continue;
|
| 207 |
|
| 208 |
case OP_CHARNC:
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| 209 |
fprintf(f, " NC ");
|
| 210 |
do
|
| 211 |
{
|
| 212 |
code++;
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code += 1 + print_char(f, code, utf8);
|
| 214 |
}
|
| 215 |
while (*code == OP_CHARNC);
|
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fprintf(f, "\n");
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| 217 |
continue;
|
| 218 |
|
| 219 |
case OP_CBRA:
|
| 220 |
case OP_SCBRA:
|
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if (print_lengths) fprintf(f, "%3d ", GET(code, 1));
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else fprintf(f, " ");
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fprintf(f, "%s %d", OP_names[*code], GET2(code, 1+LINK_SIZE));
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| 224 |
break;
|
| 225 |
|
| 226 |
case OP_BRA:
|
| 227 |
case OP_SBRA:
|
| 228 |
case OP_KETRMAX:
|
| 229 |
case OP_KETRMIN:
|
| 230 |
case OP_ALT:
|
| 231 |
case OP_KET:
|
| 232 |
case OP_ASSERT:
|
| 233 |
case OP_ASSERT_NOT:
|
| 234 |
case OP_ASSERTBACK:
|
| 235 |
case OP_ASSERTBACK_NOT:
|
| 236 |
case OP_ONCE:
|
| 237 |
case OP_COND:
|
| 238 |
case OP_SCOND:
|
| 239 |
case OP_REVERSE:
|
| 240 |
if (print_lengths) fprintf(f, "%3d ", GET(code, 1));
|
| 241 |
else fprintf(f, " ");
|
| 242 |
fprintf(f, "%s", OP_names[*code]);
|
| 243 |
break;
|
| 244 |
|
| 245 |
case OP_CREF:
|
| 246 |
fprintf(f, "%3d %s", GET2(code,1), OP_names[*code]);
|
| 247 |
break;
|
| 248 |
|
| 249 |
case OP_RREF:
|
| 250 |
c = GET2(code, 1);
|
| 251 |
if (c == RREF_ANY)
|
| 252 |
fprintf(f, " Cond recurse any");
|
| 253 |
else
|
| 254 |
fprintf(f, " Cond recurse %d", c);
|
| 255 |
break;
|
| 256 |
|
| 257 |
case OP_DEF:
|
| 258 |
fprintf(f, " Cond def");
|
| 259 |
break;
|
| 260 |
|
| 261 |
case OP_STAR:
|
| 262 |
case OP_MINSTAR:
|
| 263 |
case OP_POSSTAR:
|
| 264 |
case OP_PLUS:
|
| 265 |
case OP_MINPLUS:
|
| 266 |
case OP_POSPLUS:
|
| 267 |
case OP_QUERY:
|
| 268 |
case OP_MINQUERY:
|
| 269 |
case OP_POSQUERY:
|
| 270 |
case OP_TYPESTAR:
|
| 271 |
case OP_TYPEMINSTAR:
|
| 272 |
case OP_TYPEPOSSTAR:
|
| 273 |
case OP_TYPEPLUS:
|
| 274 |
case OP_TYPEMINPLUS:
|
| 275 |
case OP_TYPEPOSPLUS:
|
| 276 |
case OP_TYPEQUERY:
|
| 277 |
case OP_TYPEMINQUERY:
|
| 278 |
case OP_TYPEPOSQUERY:
|
| 279 |
fprintf(f, " ");
|
| 280 |
if (*code >= OP_TYPESTAR)
|
| 281 |
{
|
| 282 |
fprintf(f, "%s", OP_names[code[1]]);
|
| 283 |
if (code[1] == OP_PROP || code[1] == OP_NOTPROP)
|
| 284 |
{
|
| 285 |
fprintf(f, " %s ", get_ucpname(code[2], code[3]));
|
| 286 |
extra = 2;
|
| 287 |
}
|
| 288 |
}
|
| 289 |
else extra = print_char(f, code+1, utf8);
|
| 290 |
fprintf(f, "%s", OP_names[*code]);
|
| 291 |
break;
|
| 292 |
|
| 293 |
case OP_EXACT:
|
| 294 |
case OP_UPTO:
|
| 295 |
case OP_MINUPTO:
|
| 296 |
case OP_POSUPTO:
|
| 297 |
fprintf(f, " ");
|
| 298 |
extra = print_char(f, code+3, utf8);
|
| 299 |
fprintf(f, "{");
|
| 300 |
if (*code != OP_EXACT) fprintf(f, "0,");
|
| 301 |
fprintf(f, "%d}", GET2(code,1));
|
| 302 |
if (*code == OP_MINUPTO) fprintf(f, "?");
|
| 303 |
else if (*code == OP_POSUPTO) fprintf(f, "+");
|
| 304 |
break;
|
| 305 |
|
| 306 |
case OP_TYPEEXACT:
|
| 307 |
case OP_TYPEUPTO:
|
| 308 |
case OP_TYPEMINUPTO:
|
| 309 |
case OP_TYPEPOSUPTO:
|
| 310 |
fprintf(f, " %s", OP_names[code[3]]);
|
| 311 |
if (code[3] == OP_PROP || code[3] == OP_NOTPROP)
|
| 312 |
{
|
| 313 |
fprintf(f, " %s ", get_ucpname(code[4], code[5]));
|
| 314 |
extra = 2;
|
| 315 |
}
|
| 316 |
fprintf(f, "{");
|
| 317 |
if (*code != OP_TYPEEXACT) fprintf(f, "0,");
|
| 318 |
fprintf(f, "%d}", GET2(code,1));
|
| 319 |
if (*code == OP_TYPEMINUPTO) fprintf(f, "?");
|
| 320 |
else if (*code == OP_TYPEPOSUPTO) fprintf(f, "+");
|
| 321 |
break;
|
| 322 |
|
| 323 |
case OP_NOT:
|
| 324 |
c = code[1];
|
| 325 |
if (PRINTABLE(c)) fprintf(f, " [^%c]", c);
|
| 326 |
else fprintf(f, " [^\\x%02x]", c);
|
| 327 |
break;
|
| 328 |
|
| 329 |
case OP_NOTSTAR:
|
| 330 |
case OP_NOTMINSTAR:
|
| 331 |
case OP_NOTPOSSTAR:
|
| 332 |
case OP_NOTPLUS:
|
| 333 |
case OP_NOTMINPLUS:
|
| 334 |
case OP_NOTPOSPLUS:
|
| 335 |
case OP_NOTQUERY:
|
| 336 |
case OP_NOTMINQUERY:
|
| 337 |
case OP_NOTPOSQUERY:
|
| 338 |
c = code[1];
|
| 339 |
if (PRINTABLE(c)) fprintf(f, " [^%c]", c);
|
| 340 |
else fprintf(f, " [^\\x%02x]", c);
|
| 341 |
fprintf(f, "%s", OP_names[*code]);
|
| 342 |
break;
|
| 343 |
|
| 344 |
case OP_NOTEXACT:
|
| 345 |
case OP_NOTUPTO:
|
| 346 |
case OP_NOTMINUPTO:
|
| 347 |
case OP_NOTPOSUPTO:
|
| 348 |
c = code[3];
|
| 349 |
if (PRINTABLE(c)) fprintf(f, " [^%c]{", c);
|
| 350 |
else fprintf(f, " [^\\x%02x]{", c);
|
| 351 |
if (*code != OP_NOTEXACT) fprintf(f, "0,");
|
| 352 |
fprintf(f, "%d}", GET2(code,1));
|
| 353 |
if (*code == OP_NOTMINUPTO) fprintf(f, "?");
|
| 354 |
else if (*code == OP_NOTPOSUPTO) fprintf(f, "+");
|
| 355 |
break;
|
| 356 |
|
| 357 |
case OP_RECURSE:
|
| 358 |
if (print_lengths) fprintf(f, "%3d ", GET(code, 1));
|
| 359 |
else fprintf(f, " ");
|
| 360 |
fprintf(f, "%s", OP_names[*code]);
|
| 361 |
break;
|
| 362 |
|
| 363 |
case OP_REF:
|
| 364 |
fprintf(f, " \\%d", GET2(code,1));
|
| 365 |
ccode = code + _pcre_OP_lengths[*code];
|
| 366 |
goto CLASS_REF_REPEAT;
|
| 367 |
|
| 368 |
case OP_CALLOUT:
|
| 369 |
fprintf(f, " %s %d %d %d", OP_names[*code], code[1], GET(code,2),
|
| 370 |
GET(code, 2 + LINK_SIZE));
|
| 371 |
break;
|
| 372 |
|
| 373 |
case OP_PROP:
|
| 374 |
case OP_NOTPROP:
|
| 375 |
fprintf(f, " %s %s", OP_names[*code], get_ucpname(code[1], code[2]));
|
| 376 |
break;
|
| 377 |
|
| 378 |
/* OP_XCLASS can only occur in UTF-8 mode. However, there's no harm in
|
| 379 |
having this code always here, and it makes it less messy without all those
|
| 380 |
#ifdefs. */
|
| 381 |
|
| 382 |
case OP_CLASS:
|
| 383 |
case OP_NCLASS:
|
| 384 |
case OP_XCLASS:
|
| 385 |
{
|
| 386 |
int i, min, max;
|
| 387 |
BOOL printmap;
|
| 388 |
|
| 389 |
fprintf(f, " [");
|
| 390 |
|
| 391 |
if (*code == OP_XCLASS)
|
| 392 |
{
|
| 393 |
extra = GET(code, 1);
|
| 394 |
ccode = code + LINK_SIZE + 1;
|
| 395 |
printmap = (*ccode & XCL_MAP) != 0;
|
| 396 |
if ((*ccode++ & XCL_NOT) != 0) fprintf(f, "^");
|
| 397 |
}
|
| 398 |
else
|
| 399 |
{
|
| 400 |
printmap = TRUE;
|
| 401 |
ccode = code + 1;
|
| 402 |
}
|
| 403 |
|
| 404 |
/* Print a bit map */
|
| 405 |
|
| 406 |
if (printmap)
|
| 407 |
{
|
| 408 |
for (i = 0; i < 256; i++)
|
| 409 |
{
|
| 410 |
if ((ccode[i/8] & (1 << (i&7))) != 0)
|
| 411 |
{
|
| 412 |
int j;
|
| 413 |
for (j = i+1; j < 256; j++)
|
| 414 |
if ((ccode[j/8] & (1 << (j&7))) == 0) break;
|
| 415 |
if (i == '-' || i == ']') fprintf(f, "\\");
|
| 416 |
if (PRINTABLE(i)) fprintf(f, "%c", i);
|
| 417 |
else fprintf(f, "\\x%02x", i);
|
| 418 |
if (--j > i)
|
| 419 |
{
|
| 420 |
if (j != i + 1) fprintf(f, "-");
|
| 421 |
if (j == '-' || j == ']') fprintf(f, "\\");
|
| 422 |
if (PRINTABLE(j)) fprintf(f, "%c", j);
|
| 423 |
else fprintf(f, "\\x%02x", j);
|
| 424 |
}
|
| 425 |
i = j;
|
| 426 |
}
|
| 427 |
}
|
| 428 |
ccode += 32;
|
| 429 |
}
|
| 430 |
|
| 431 |
/* For an XCLASS there is always some additional data */
|
| 432 |
|
| 433 |
if (*code == OP_XCLASS)
|
| 434 |
{
|
| 435 |
int ch;
|
| 436 |
while ((ch = *ccode++) != XCL_END)
|
| 437 |
{
|
| 438 |
if (ch == XCL_PROP)
|
| 439 |
{
|
| 440 |
int ptype = *ccode++;
|
| 441 |
int pvalue = *ccode++;
|
| 442 |
fprintf(f, "\\p{%s}", get_ucpname(ptype, pvalue));
|
| 443 |
}
|
| 444 |
else if (ch == XCL_NOTPROP)
|
| 445 |
{
|
| 446 |
int ptype = *ccode++;
|
| 447 |
int pvalue = *ccode++;
|
| 448 |
fprintf(f, "\\P{%s}", get_ucpname(ptype, pvalue));
|
| 449 |
}
|
| 450 |
else
|
| 451 |
{
|
| 452 |
ccode += 1 + print_char(f, ccode, TRUE);
|
| 453 |
if (ch == XCL_RANGE)
|
| 454 |
{
|
| 455 |
fprintf(f, "-");
|
| 456 |
ccode += 1 + print_char(f, ccode, TRUE);
|
| 457 |
}
|
| 458 |
}
|
| 459 |
}
|
| 460 |
}
|
| 461 |
|
| 462 |
/* Indicate a non-UTF8 class which was created by negation */
|
| 463 |
|
| 464 |
fprintf(f, "]%s", (*code == OP_NCLASS)? " (neg)" : "");
|
| 465 |
|
| 466 |
/* Handle repeats after a class or a back reference */
|
| 467 |
|
| 468 |
CLASS_REF_REPEAT:
|
| 469 |
switch(*ccode)
|
| 470 |
{
|
| 471 |
case OP_CRSTAR:
|
| 472 |
case OP_CRMINSTAR:
|
| 473 |
case OP_CRPLUS:
|
| 474 |
case OP_CRMINPLUS:
|
| 475 |
case OP_CRQUERY:
|
| 476 |
case OP_CRMINQUERY:
|
| 477 |
fprintf(f, "%s", OP_names[*ccode]);
|
| 478 |
extra += _pcre_OP_lengths[*ccode];
|
| 479 |
break;
|
| 480 |
|
| 481 |
case OP_CRRANGE:
|
| 482 |
case OP_CRMINRANGE:
|
| 483 |
min = GET2(ccode,1);
|
| 484 |
max = GET2(ccode,3);
|
| 485 |
if (max == 0) fprintf(f, "{%d,}", min);
|
| 486 |
else fprintf(f, "{%d,%d}", min, max);
|
| 487 |
if (*ccode == OP_CRMINRANGE) fprintf(f, "?");
|
| 488 |
extra += _pcre_OP_lengths[*ccode];
|
| 489 |
break;
|
| 490 |
|
| 491 |
/* Do nothing if it's not a repeat; this code stops picky compilers
|
| 492 |
warning about the lack of a default code path. */
|
| 493 |
|
| 494 |
default:
|
| 495 |
break;
|
| 496 |
}
|
| 497 |
}
|
| 498 |
break;
|
| 499 |
|
| 500 |
/* Anything else is just an item with no data*/
|
| 501 |
|
| 502 |
default:
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| 503 |
fprintf(f, " %s", OP_names[*code]);
|
| 504 |
break;
|
| 505 |
}
|
| 506 |
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| 507 |
code += _pcre_OP_lengths[*code] + extra;
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| 508 |
fprintf(f, "\n");
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| 509 |
}
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| 510 |
}
|
| 511 |
|
| 512 |
/* End of pcre_printint.src */
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