433 lines
12 KiB
C
433 lines
12 KiB
C
/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Original API code Copyright (c) 1997-2012 University of Cambridge
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New API code Copyright (c) 2016-2018 University of Cambridge
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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
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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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
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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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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre2_internal.h"
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/*************************************************
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* Return info about compiled pattern *
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*************************************************/
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/*
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Arguments:
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code points to compiled code
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what what information is required
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where where to put the information; if NULL, return length
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Returns: 0 when data returned
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> 0 when length requested
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< 0 on error or unset value
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_pattern_info(const pcre2_code *code, uint32_t what, void *where)
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{
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const pcre2_real_code *re = (pcre2_real_code *)code;
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if (where == NULL) /* Requests field length */
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{
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switch(what)
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{
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case PCRE2_INFO_ALLOPTIONS:
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case PCRE2_INFO_ARGOPTIONS:
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case PCRE2_INFO_BACKREFMAX:
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case PCRE2_INFO_BSR:
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case PCRE2_INFO_CAPTURECOUNT:
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case PCRE2_INFO_DEPTHLIMIT:
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case PCRE2_INFO_EXTRAOPTIONS:
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case PCRE2_INFO_FIRSTCODETYPE:
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case PCRE2_INFO_FIRSTCODEUNIT:
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case PCRE2_INFO_HASBACKSLASHC:
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case PCRE2_INFO_HASCRORLF:
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case PCRE2_INFO_HEAPLIMIT:
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case PCRE2_INFO_JCHANGED:
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case PCRE2_INFO_LASTCODETYPE:
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case PCRE2_INFO_LASTCODEUNIT:
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case PCRE2_INFO_MATCHEMPTY:
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case PCRE2_INFO_MATCHLIMIT:
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case PCRE2_INFO_MAXLOOKBEHIND:
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case PCRE2_INFO_MINLENGTH:
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case PCRE2_INFO_NAMEENTRYSIZE:
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case PCRE2_INFO_NAMECOUNT:
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case PCRE2_INFO_NEWLINE:
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return sizeof(uint32_t);
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case PCRE2_INFO_FIRSTBITMAP:
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return sizeof(const uint8_t *);
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case PCRE2_INFO_JITSIZE:
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case PCRE2_INFO_SIZE:
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case PCRE2_INFO_FRAMESIZE:
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return sizeof(size_t);
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case PCRE2_INFO_NAMETABLE:
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return sizeof(PCRE2_SPTR);
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}
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}
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if (re == NULL) return PCRE2_ERROR_NULL;
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/* Check that the first field in the block is the magic number. If it is not,
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return with PCRE2_ERROR_BADMAGIC. */
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if (re->magic_number != MAGIC_NUMBER) return PCRE2_ERROR_BADMAGIC;
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/* Check that this pattern was compiled in the correct bit mode */
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if ((re->flags & (PCRE2_CODE_UNIT_WIDTH/8)) == 0) return PCRE2_ERROR_BADMODE;
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switch(what)
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{
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case PCRE2_INFO_ALLOPTIONS:
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*((uint32_t *)where) = re->overall_options;
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break;
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case PCRE2_INFO_ARGOPTIONS:
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*((uint32_t *)where) = re->compile_options;
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break;
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case PCRE2_INFO_BACKREFMAX:
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*((uint32_t *)where) = re->top_backref;
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break;
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case PCRE2_INFO_BSR:
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*((uint32_t *)where) = re->bsr_convention;
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break;
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case PCRE2_INFO_CAPTURECOUNT:
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*((uint32_t *)where) = re->top_bracket;
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break;
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case PCRE2_INFO_DEPTHLIMIT:
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*((uint32_t *)where) = re->limit_depth;
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if (re->limit_depth == UINT32_MAX) return PCRE2_ERROR_UNSET;
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break;
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case PCRE2_INFO_EXTRAOPTIONS:
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*((uint32_t *)where) = re->extra_options;
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break;
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case PCRE2_INFO_FIRSTCODETYPE:
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*((uint32_t *)where) = ((re->flags & PCRE2_FIRSTSET) != 0)? 1 :
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((re->flags & PCRE2_STARTLINE) != 0)? 2 : 0;
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break;
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case PCRE2_INFO_FIRSTCODEUNIT:
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*((uint32_t *)where) = ((re->flags & PCRE2_FIRSTSET) != 0)?
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re->first_codeunit : 0;
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break;
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case PCRE2_INFO_FIRSTBITMAP:
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*((const uint8_t **)where) = ((re->flags & PCRE2_FIRSTMAPSET) != 0)?
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&(re->start_bitmap[0]) : NULL;
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break;
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case PCRE2_INFO_FRAMESIZE:
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*((size_t *)where) = offsetof(heapframe, ovector) +
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re->top_bracket * 2 * sizeof(PCRE2_SIZE);
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break;
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case PCRE2_INFO_HASBACKSLASHC:
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*((uint32_t *)where) = (re->flags & PCRE2_HASBKC) != 0;
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break;
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case PCRE2_INFO_HASCRORLF:
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*((uint32_t *)where) = (re->flags & PCRE2_HASCRORLF) != 0;
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break;
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case PCRE2_INFO_HEAPLIMIT:
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*((uint32_t *)where) = re->limit_heap;
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if (re->limit_heap == UINT32_MAX) return PCRE2_ERROR_UNSET;
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break;
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case PCRE2_INFO_JCHANGED:
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*((uint32_t *)where) = (re->flags & PCRE2_JCHANGED) != 0;
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break;
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case PCRE2_INFO_JITSIZE:
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#ifdef SUPPORT_JIT
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*((size_t *)where) = (re->executable_jit != NULL)?
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PRIV(jit_get_size)(re->executable_jit) : 0;
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#else
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*((size_t *)where) = 0;
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#endif
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break;
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case PCRE2_INFO_LASTCODETYPE:
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*((uint32_t *)where) = ((re->flags & PCRE2_LASTSET) != 0)? 1 : 0;
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break;
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case PCRE2_INFO_LASTCODEUNIT:
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*((uint32_t *)where) = ((re->flags & PCRE2_LASTSET) != 0)?
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re->last_codeunit : 0;
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break;
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case PCRE2_INFO_MATCHEMPTY:
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*((uint32_t *)where) = (re->flags & PCRE2_MATCH_EMPTY) != 0;
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break;
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case PCRE2_INFO_MATCHLIMIT:
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*((uint32_t *)where) = re->limit_match;
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if (re->limit_match == UINT32_MAX) return PCRE2_ERROR_UNSET;
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break;
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case PCRE2_INFO_MAXLOOKBEHIND:
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*((uint32_t *)where) = re->max_lookbehind;
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break;
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case PCRE2_INFO_MINLENGTH:
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*((uint32_t *)where) = re->minlength;
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break;
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case PCRE2_INFO_NAMEENTRYSIZE:
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*((uint32_t *)where) = re->name_entry_size;
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break;
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case PCRE2_INFO_NAMECOUNT:
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*((uint32_t *)where) = re->name_count;
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break;
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case PCRE2_INFO_NAMETABLE:
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*((PCRE2_SPTR *)where) = (PCRE2_SPTR)((char *)re + sizeof(pcre2_real_code));
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break;
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case PCRE2_INFO_NEWLINE:
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*((uint32_t *)where) = re->newline_convention;
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break;
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case PCRE2_INFO_SIZE:
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*((size_t *)where) = re->blocksize;
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break;
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default: return PCRE2_ERROR_BADOPTION;
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}
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return 0;
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}
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/*************************************************
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* Callout enumerator *
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*************************************************/
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/*
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Arguments:
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code points to compiled code
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callback function called for each callout block
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callout_data user data passed to the callback
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Returns: 0 when successfully completed
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< 0 on local error
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!= 0 for callback error
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_callout_enumerate(const pcre2_code *code,
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int (*callback)(pcre2_callout_enumerate_block *, void *), void *callout_data)
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{
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pcre2_real_code *re = (pcre2_real_code *)code;
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pcre2_callout_enumerate_block cb;
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PCRE2_SPTR cc;
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#ifdef SUPPORT_UNICODE
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BOOL utf;
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#endif
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if (re == NULL) return PCRE2_ERROR_NULL;
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#ifdef SUPPORT_UNICODE
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utf = (re->overall_options & PCRE2_UTF) != 0;
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#endif
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/* Check that the first field in the block is the magic number. If it is not,
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return with PCRE2_ERROR_BADMAGIC. */
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if (re->magic_number != MAGIC_NUMBER) return PCRE2_ERROR_BADMAGIC;
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/* Check that this pattern was compiled in the correct bit mode */
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if ((re->flags & (PCRE2_CODE_UNIT_WIDTH/8)) == 0) return PCRE2_ERROR_BADMODE;
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cb.version = 0;
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cc = (PCRE2_SPTR)((uint8_t *)re + sizeof(pcre2_real_code))
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+ re->name_count * re->name_entry_size;
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while (TRUE)
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{
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int rc;
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switch (*cc)
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{
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case OP_END:
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return 0;
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case OP_CHAR:
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case OP_CHARI:
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case OP_NOT:
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case OP_NOTI:
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case OP_STAR:
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case OP_MINSTAR:
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case OP_PLUS:
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case OP_MINPLUS:
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case OP_QUERY:
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case OP_MINQUERY:
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case OP_UPTO:
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case OP_MINUPTO:
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case OP_EXACT:
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case OP_POSSTAR:
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case OP_POSPLUS:
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case OP_POSQUERY:
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case OP_POSUPTO:
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case OP_STARI:
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case OP_MINSTARI:
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case OP_PLUSI:
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case OP_MINPLUSI:
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case OP_QUERYI:
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case OP_MINQUERYI:
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case OP_UPTOI:
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case OP_MINUPTOI:
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case OP_EXACTI:
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case OP_POSSTARI:
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case OP_POSPLUSI:
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case OP_POSQUERYI:
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case OP_POSUPTOI:
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case OP_NOTSTAR:
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case OP_NOTMINSTAR:
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case OP_NOTPLUS:
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case OP_NOTMINPLUS:
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case OP_NOTQUERY:
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case OP_NOTMINQUERY:
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case OP_NOTUPTO:
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case OP_NOTMINUPTO:
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case OP_NOTEXACT:
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case OP_NOTPOSSTAR:
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case OP_NOTPOSPLUS:
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case OP_NOTPOSQUERY:
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case OP_NOTPOSUPTO:
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case OP_NOTSTARI:
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case OP_NOTMINSTARI:
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case OP_NOTPLUSI:
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case OP_NOTMINPLUSI:
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case OP_NOTQUERYI:
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case OP_NOTMINQUERYI:
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case OP_NOTUPTOI:
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case OP_NOTMINUPTOI:
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case OP_NOTEXACTI:
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case OP_NOTPOSSTARI:
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case OP_NOTPOSPLUSI:
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case OP_NOTPOSQUERYI:
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case OP_NOTPOSUPTOI:
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cc += PRIV(OP_lengths)[*cc];
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#ifdef SUPPORT_UNICODE
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if (utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
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#endif
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break;
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case OP_TYPESTAR:
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case OP_TYPEMINSTAR:
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case OP_TYPEPLUS:
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case OP_TYPEMINPLUS:
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case OP_TYPEQUERY:
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case OP_TYPEMINQUERY:
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case OP_TYPEUPTO:
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case OP_TYPEMINUPTO:
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case OP_TYPEEXACT:
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case OP_TYPEPOSSTAR:
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case OP_TYPEPOSPLUS:
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case OP_TYPEPOSQUERY:
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case OP_TYPEPOSUPTO:
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cc += PRIV(OP_lengths)[*cc];
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#ifdef SUPPORT_UNICODE
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if (cc[-1] == OP_PROP || cc[-1] == OP_NOTPROP) cc += 2;
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#endif
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break;
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#if defined SUPPORT_UNICODE || PCRE2_CODE_UNIT_WIDTH != 8
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case OP_XCLASS:
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cc += GET(cc, 1);
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break;
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#endif
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case OP_MARK:
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case OP_COMMIT_ARG:
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case OP_PRUNE_ARG:
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case OP_SKIP_ARG:
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case OP_THEN_ARG:
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cc += PRIV(OP_lengths)[*cc] + cc[1];
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break;
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case OP_CALLOUT:
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cb.pattern_position = GET(cc, 1);
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cb.next_item_length = GET(cc, 1 + LINK_SIZE);
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cb.callout_number = cc[1 + 2*LINK_SIZE];
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cb.callout_string_offset = 0;
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cb.callout_string_length = 0;
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cb.callout_string = NULL;
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rc = callback(&cb, callout_data);
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if (rc != 0) return rc;
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cc += PRIV(OP_lengths)[*cc];
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break;
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case OP_CALLOUT_STR:
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cb.pattern_position = GET(cc, 1);
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cb.next_item_length = GET(cc, 1 + LINK_SIZE);
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cb.callout_number = 0;
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cb.callout_string_offset = GET(cc, 1 + 3*LINK_SIZE);
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cb.callout_string_length =
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GET(cc, 1 + 2*LINK_SIZE) - (1 + 4*LINK_SIZE) - 2;
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cb.callout_string = cc + (1 + 4*LINK_SIZE) + 1;
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rc = callback(&cb, callout_data);
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if (rc != 0) return rc;
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cc += GET(cc, 1 + 2*LINK_SIZE);
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break;
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default:
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cc += PRIV(OP_lengths)[*cc];
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break;
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}
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}
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}
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/* End of pcre2_pattern_info.c */
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