489 lines
15 KiB
C
489 lines
15 KiB
C
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/*************************************************
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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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* Default malloc/free functions *
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*************************************************/
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/* Ignore the "user data" argument in each case. */
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static void *default_malloc(size_t size, void *data)
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{
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(void)data;
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return malloc(size);
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}
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static void default_free(void *block, void *data)
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{
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(void)data;
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free(block);
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}
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/*************************************************
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* Get a block and save memory control *
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*************************************************/
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/* This internal function is called to get a block of memory in which the
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memory control data is to be stored at the start for future use.
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Arguments:
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size amount of memory required
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memctl pointer to a memctl block or NULL
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Returns: pointer to memory or NULL on failure
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*/
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extern void *
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PRIV(memctl_malloc)(size_t size, pcre2_memctl *memctl)
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{
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pcre2_memctl *newmemctl;
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void *yield = (memctl == NULL)? malloc(size) :
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memctl->malloc(size, memctl->memory_data);
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if (yield == NULL) return NULL;
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newmemctl = (pcre2_memctl *)yield;
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if (memctl == NULL)
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{
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newmemctl->malloc = default_malloc;
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newmemctl->free = default_free;
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newmemctl->memory_data = NULL;
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}
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else *newmemctl = *memctl;
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return yield;
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}
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/*************************************************
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* Create and initialize contexts *
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*************************************************/
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/* Initializing for compile and match contexts is done in separate, private
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functions so that these can be called from functions such as pcre2_compile()
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when an external context is not supplied. The initializing functions have an
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option to set up default memory management. */
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PCRE2_EXP_DEFN pcre2_general_context * PCRE2_CALL_CONVENTION
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pcre2_general_context_create(void *(*private_malloc)(size_t, void *),
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void (*private_free)(void *, void *), void *memory_data)
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{
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pcre2_general_context *gcontext;
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if (private_malloc == NULL) private_malloc = default_malloc;
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if (private_free == NULL) private_free = default_free;
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gcontext = private_malloc(sizeof(pcre2_real_general_context), memory_data);
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if (gcontext == NULL) return NULL;
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gcontext->memctl.malloc = private_malloc;
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gcontext->memctl.free = private_free;
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gcontext->memctl.memory_data = memory_data;
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return gcontext;
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}
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/* A default compile context is set up to save having to initialize at run time
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when no context is supplied to the compile function. */
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const pcre2_compile_context PRIV(default_compile_context) = {
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{ default_malloc, default_free, NULL }, /* Default memory handling */
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NULL, /* Stack guard */
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NULL, /* Stack guard data */
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PRIV(default_tables), /* Character tables */
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PCRE2_UNSET, /* Max pattern length */
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BSR_DEFAULT, /* Backslash R default */
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NEWLINE_DEFAULT, /* Newline convention */
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PARENS_NEST_LIMIT, /* As it says */
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0 }; /* Extra options */
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/* The create function copies the default into the new memory, but must
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override the default memory handling functions if a gcontext was provided. */
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PCRE2_EXP_DEFN pcre2_compile_context * PCRE2_CALL_CONVENTION
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pcre2_compile_context_create(pcre2_general_context *gcontext)
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{
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pcre2_compile_context *ccontext = PRIV(memctl_malloc)(
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sizeof(pcre2_real_compile_context), (pcre2_memctl *)gcontext);
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if (ccontext == NULL) return NULL;
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*ccontext = PRIV(default_compile_context);
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if (gcontext != NULL)
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*((pcre2_memctl *)ccontext) = *((pcre2_memctl *)gcontext);
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return ccontext;
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}
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/* A default match context is set up to save having to initialize at run time
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when no context is supplied to a match function. */
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const pcre2_match_context PRIV(default_match_context) = {
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{ default_malloc, default_free, NULL },
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#ifdef SUPPORT_JIT
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NULL, /* JIT callback */
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NULL, /* JIT callback data */
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#endif
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NULL, /* Callout function */
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NULL, /* Callout data */
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NULL, /* Substitute callout function */
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NULL, /* Substitute callout data */
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PCRE2_UNSET, /* Offset limit */
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HEAP_LIMIT,
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MATCH_LIMIT,
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MATCH_LIMIT_DEPTH };
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/* The create function copies the default into the new memory, but must
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override the default memory handling functions if a gcontext was provided. */
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PCRE2_EXP_DEFN pcre2_match_context * PCRE2_CALL_CONVENTION
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pcre2_match_context_create(pcre2_general_context *gcontext)
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{
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pcre2_match_context *mcontext = PRIV(memctl_malloc)(
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sizeof(pcre2_real_match_context), (pcre2_memctl *)gcontext);
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if (mcontext == NULL) return NULL;
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*mcontext = PRIV(default_match_context);
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if (gcontext != NULL)
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*((pcre2_memctl *)mcontext) = *((pcre2_memctl *)gcontext);
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return mcontext;
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}
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/* A default convert context is set up to save having to initialize at run time
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when no context is supplied to the convert function. */
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const pcre2_convert_context PRIV(default_convert_context) = {
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{ default_malloc, default_free, NULL }, /* Default memory handling */
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#ifdef _WIN32
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CHAR_BACKSLASH, /* Default path separator */
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CHAR_GRAVE_ACCENT /* Default escape character */
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#else /* Not Windows */
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CHAR_SLASH, /* Default path separator */
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CHAR_BACKSLASH /* Default escape character */
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#endif
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};
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/* The create function copies the default into the new memory, but must
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override the default memory handling functions if a gcontext was provided. */
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PCRE2_EXP_DEFN pcre2_convert_context * PCRE2_CALL_CONVENTION
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pcre2_convert_context_create(pcre2_general_context *gcontext)
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{
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pcre2_convert_context *ccontext = PRIV(memctl_malloc)(
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sizeof(pcre2_real_convert_context), (pcre2_memctl *)gcontext);
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if (ccontext == NULL) return NULL;
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*ccontext = PRIV(default_convert_context);
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if (gcontext != NULL)
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*((pcre2_memctl *)ccontext) = *((pcre2_memctl *)gcontext);
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return ccontext;
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}
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/*************************************************
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* Context copy functions *
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*************************************************/
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PCRE2_EXP_DEFN pcre2_general_context * PCRE2_CALL_CONVENTION
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pcre2_general_context_copy(pcre2_general_context *gcontext)
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{
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pcre2_general_context *new =
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gcontext->memctl.malloc(sizeof(pcre2_real_general_context),
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gcontext->memctl.memory_data);
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if (new == NULL) return NULL;
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memcpy(new, gcontext, sizeof(pcre2_real_general_context));
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return new;
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}
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PCRE2_EXP_DEFN pcre2_compile_context * PCRE2_CALL_CONVENTION
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pcre2_compile_context_copy(pcre2_compile_context *ccontext)
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{
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pcre2_compile_context *new =
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ccontext->memctl.malloc(sizeof(pcre2_real_compile_context),
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ccontext->memctl.memory_data);
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if (new == NULL) return NULL;
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memcpy(new, ccontext, sizeof(pcre2_real_compile_context));
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return new;
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}
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PCRE2_EXP_DEFN pcre2_match_context * PCRE2_CALL_CONVENTION
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pcre2_match_context_copy(pcre2_match_context *mcontext)
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{
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pcre2_match_context *new =
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mcontext->memctl.malloc(sizeof(pcre2_real_match_context),
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mcontext->memctl.memory_data);
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if (new == NULL) return NULL;
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memcpy(new, mcontext, sizeof(pcre2_real_match_context));
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return new;
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}
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PCRE2_EXP_DEFN pcre2_convert_context * PCRE2_CALL_CONVENTION
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pcre2_convert_context_copy(pcre2_convert_context *ccontext)
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{
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pcre2_convert_context *new =
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ccontext->memctl.malloc(sizeof(pcre2_real_convert_context),
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ccontext->memctl.memory_data);
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if (new == NULL) return NULL;
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memcpy(new, ccontext, sizeof(pcre2_real_convert_context));
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return new;
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}
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/*************************************************
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* Context free functions *
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*************************************************/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_general_context_free(pcre2_general_context *gcontext)
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{
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if (gcontext != NULL)
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gcontext->memctl.free(gcontext, gcontext->memctl.memory_data);
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}
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_compile_context_free(pcre2_compile_context *ccontext)
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{
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if (ccontext != NULL)
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ccontext->memctl.free(ccontext, ccontext->memctl.memory_data);
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}
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_match_context_free(pcre2_match_context *mcontext)
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{
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if (mcontext != NULL)
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mcontext->memctl.free(mcontext, mcontext->memctl.memory_data);
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}
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_convert_context_free(pcre2_convert_context *ccontext)
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{
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if (ccontext != NULL)
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ccontext->memctl.free(ccontext, ccontext->memctl.memory_data);
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}
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/*************************************************
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* Set values in contexts *
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*************************************************/
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/* All these functions return 0 for success or PCRE2_ERROR_BADDATA if invalid
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data is given. Only some of the functions are able to test the validity of the
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data. */
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/* ------------ Compile context ------------ */
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_set_character_tables(pcre2_compile_context *ccontext,
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const uint8_t *tables)
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{
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ccontext->tables = tables;
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return 0;
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}
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_set_bsr(pcre2_compile_context *ccontext, uint32_t value)
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{
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switch(value)
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{
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case PCRE2_BSR_ANYCRLF:
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case PCRE2_BSR_UNICODE:
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ccontext->bsr_convention = value;
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return 0;
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default:
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return PCRE2_ERROR_BADDATA;
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}
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}
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_set_max_pattern_length(pcre2_compile_context *ccontext, PCRE2_SIZE length)
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{
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ccontext->max_pattern_length = length;
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return 0;
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}
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_set_newline(pcre2_compile_context *ccontext, uint32_t newline)
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{
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switch(newline)
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{
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case PCRE2_NEWLINE_CR:
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case PCRE2_NEWLINE_LF:
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case PCRE2_NEWLINE_CRLF:
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case PCRE2_NEWLINE_ANY:
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case PCRE2_NEWLINE_ANYCRLF:
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case PCRE2_NEWLINE_NUL:
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ccontext->newline_convention = newline;
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return 0;
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default:
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return PCRE2_ERROR_BADDATA;
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}
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}
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_parens_nest_limit(pcre2_compile_context *ccontext, uint32_t limit)
|
||
|
|
{
|
||
|
|
ccontext->parens_nest_limit = limit;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_compile_extra_options(pcre2_compile_context *ccontext, uint32_t options)
|
||
|
|
{
|
||
|
|
ccontext->extra_options = options;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_compile_recursion_guard(pcre2_compile_context *ccontext,
|
||
|
|
int (*guard)(uint32_t, void *), void *user_data)
|
||
|
|
{
|
||
|
|
ccontext->stack_guard = guard;
|
||
|
|
ccontext->stack_guard_data = user_data;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* ------------ Match context ------------ */
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_callout(pcre2_match_context *mcontext,
|
||
|
|
int (*callout)(pcre2_callout_block *, void *), void *callout_data)
|
||
|
|
{
|
||
|
|
mcontext->callout = callout;
|
||
|
|
mcontext->callout_data = callout_data;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_substitute_callout(pcre2_match_context *mcontext,
|
||
|
|
int (*substitute_callout)(pcre2_substitute_callout_block *, void *),
|
||
|
|
void *substitute_callout_data)
|
||
|
|
{
|
||
|
|
mcontext->substitute_callout = substitute_callout;
|
||
|
|
mcontext->substitute_callout_data = substitute_callout_data;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_heap_limit(pcre2_match_context *mcontext, uint32_t limit)
|
||
|
|
{
|
||
|
|
mcontext->heap_limit = limit;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_match_limit(pcre2_match_context *mcontext, uint32_t limit)
|
||
|
|
{
|
||
|
|
mcontext->match_limit = limit;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_depth_limit(pcre2_match_context *mcontext, uint32_t limit)
|
||
|
|
{
|
||
|
|
mcontext->depth_limit = limit;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_offset_limit(pcre2_match_context *mcontext, PCRE2_SIZE limit)
|
||
|
|
{
|
||
|
|
mcontext->offset_limit = limit;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This function became obsolete at release 10.30. It is kept as a synonym for
|
||
|
|
backwards compatibility. */
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_recursion_limit(pcre2_match_context *mcontext, uint32_t limit)
|
||
|
|
{
|
||
|
|
return pcre2_set_depth_limit(mcontext, limit);
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_recursion_memory_management(pcre2_match_context *mcontext,
|
||
|
|
void *(*mymalloc)(size_t, void *), void (*myfree)(void *, void *),
|
||
|
|
void *mydata)
|
||
|
|
{
|
||
|
|
(void)mcontext;
|
||
|
|
(void)mymalloc;
|
||
|
|
(void)myfree;
|
||
|
|
(void)mydata;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ------------ Convert context ------------ */
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_glob_separator(pcre2_convert_context *ccontext, uint32_t separator)
|
||
|
|
{
|
||
|
|
if (separator != CHAR_SLASH && separator != CHAR_BACKSLASH &&
|
||
|
|
separator != CHAR_DOT) return PCRE2_ERROR_BADDATA;
|
||
|
|
ccontext->glob_separator = separator;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
|
||
|
|
pcre2_set_glob_escape(pcre2_convert_context *ccontext, uint32_t escape)
|
||
|
|
{
|
||
|
|
if (escape > 255 || (escape != 0 && !ispunct(escape)))
|
||
|
|
return PCRE2_ERROR_BADDATA;
|
||
|
|
ccontext->glob_escape = escape;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* End of pcre2_context.c */
|
||
|
|
|