353 lines
12 KiB
C
353 lines
12 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) 2014 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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/* FIXME: most of these are currently placeholder functions */
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/*************************************************
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* Copy named captured string to given buffer *
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*************************************************/
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/* This function copies a single captured substring into a given buffer,
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identifying it by name. If the regex permits duplicate names, the first
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substring that is set is chosen.
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Arguments:
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match_data points to the match data
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stringname the name of the required substring
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buffer where to put the substring
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size the size of the buffer
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Returns: if successful:
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the length of the copied string, not including the zero
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that is put on the end; can be zero
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if not successful, a negative error code:
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PCRE2_ERROR_NOMEMORY: buffer too small
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PCRE2_ERROR_NOSUBSTRING: no such captured substring
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_copy_named_substring(pcre2_match_data *match_data, PCRE2_SPTR stringname,
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PCRE2_UCHAR *buffer, size_t size)
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{
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match_data=match_data;stringname=stringname;buffer=buffer;size=size;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Copy numbered captured string to given buffer *
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*************************************************/
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/* This function copies a single captured substring into a given buffer,
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identifying it by number.
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Arguments:
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match_data points to the match data
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stringnumber the number of the required substring
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buffer where to put the substring
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size the size of the buffer
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Returns: if successful:
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the length of the copied string, not including the zero
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that is put on the end; can be zero
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if not successful, a negative error code:
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PCRE2_ERROR_NOMEMORY: buffer too small
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PCRE2_ERROR_NOSUBSTRING: no such captured substring
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_copy_substring(pcre2_match_data *match_data, int stringnumber,
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PCRE2_UCHAR *buffer, size_t size)
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{
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match_data=match_data;stringnumber=stringnumber;buffer=buffer;size=size;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Free memory obtained by get_substring *
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*************************************************/
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/* This function exists for the benefit of people calling PCRE from non-C
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programs that can call its functions, but not free() itself.
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Arguments:
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context points to a PCRE2 context
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string the result of a previous pcre2_get_substring()
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Returns: nothing
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*/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_free_substring(pcre2_context *context, PCRE2_UCHAR *string)
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{
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context->free(string, context->user_data);
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return;
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}
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/*************************************************
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* Free memory obtained by get_substring_list *
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*************************************************/
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/* This function exists for the benefit of people calling PCRE from non-C
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programs that can call its functions, but not free() itself.
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Arguments:
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context points to a PCRE2 context
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list the result of a previous pcre2_get_substring_list()
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Returns: nothing
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*/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_free_substring_list(pcre2_context *context, PCRE2_SPTR *list)
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{
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context->free(list, context->user_data);
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return;
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}
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/*************************************************
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* Extract named captured string *
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*************************************************/
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/* This function copies a single captured substring, identified by name, into
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new memory. If the regex permits duplicate names, the first substring that is
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set is chosen.
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Arguments:
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context points to a PCRE2 context
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match_data pointer to match_data
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stringname the name of the required substring
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stringptr where to put the pointer
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Returns: if successful:
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the length of the copied string, not including the zero
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that is put on the end; can be zero
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if not successful, a negative value:
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PCRE2_ERROR_NOMEMORY: couldn't get memory
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PCRE2_ERROR_NOSUBSTRING: no such captured substring
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_named_substring(pcre2_context *context, pcre2_match_data *match_data,
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PCRE2_SPTR stringname, PCRE2_UCHAR **stringptr)
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{
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context=context;match_data=match_data;stringname=stringname;stringptr=stringptr;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Get length of a named substring *
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*************************************************/
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/* This function returns the length of a named captured substring. If the regex
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permits duplicate names, the first substring that is set is chosen.
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Arguments:
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match_data pointer to match data
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stringname the name of the required substring
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Returns: a non-negative length if successful
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a negative error code otherwise
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_named_substring_length(pcre2_match_data *match_data,
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PCRE2_SPTR stringname)
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{
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match_data=match_data;stringname=stringname;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Find (multiple) entries for named string *
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*************************************************/
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/* This is used by the local get_first_set() function, as well as being
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generally available. It is used when duplicated names are permitted.
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Arguments:
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code the compiled regex
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stringname the name whose entries required
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firstptr where to put the pointer to the first entry
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lastptr where to put the pointer to the last entry
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Returns: the length of each entry, or a negative number
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(PCRE2_ERROR_NOSUBSTRING) if not found
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_stringtable_entries(const pcre2_code *code, PCRE2_SPTR stringname,
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PCRE2_UCHAR **firstptr, PCRE2_UCHAR **lastptr)
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{
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code=code;stringname=stringname;firstptr=firstptr;lastptr=lastptr;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Extract captured string to new memory *
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*************************************************/
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/* This function copies a single captured substring into a piece of new
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memory.
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Arguments:
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context points to a PCRE2 context
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match_data points to match data
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stringnumber the number of the required substring
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stringptr where to put a pointer to the substring
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Returns: if successful:
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the length of the string, not including the zero that
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is put on the end; can be zero
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if not successful a negative error code:
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PCRE2_ERROR_NOMEMORY: failed to get memory
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PCRE2_ERROR_NOSUBSTRING: substring not present
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_substring(pcre2_context *context, pcre2_match_data *match_data,
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int stringnumber, PCRE2_UCHAR **stringptr)
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{
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context=context;match_data=match_data;stringnumber=stringnumber;
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stringptr=stringptr;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Get length of a numbered substring *
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*************************************************/
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/* This function returns the length of a captured substring.
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Arguments:
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match_data pointer to match data
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stringnumber the number of the required substring
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Returns: a non-negative length if successful
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a negative error code otherwise
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_substring_length(pcre2_match_data *match_data,
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int stringnumber)
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{
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match_data=match_data;stringnumber=stringnumber;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/*************************************************
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* Extract all captured strings to new memory *
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*************************************************/
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/* This function gets one chunk of memory and builds a list of pointers and all
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the captured substrings in it. A NULL pointer is put on the end of the list.
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Arguments:
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context points to a PCRE2 context
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match_data points to the match data
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listptr set to point to the list of pointers
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Returns: if successful: 0
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if not successful, a negative error code:
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PCRE2_ERROR_NOMEMORY: failed to get memory
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_substring_list(pcre2_context *context, pcre2_match_data *match_data,
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PCRE2_UCHAR ***listptr)
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{
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context=context;match_data=match_data;listptr=listptr;
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return PCRE2_ERROR_NOMEMORY;
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}
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/*************************************************
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* Find number for named string *
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*************************************************/
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/* This function is used by the local get_first_set() function, as well
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as being generally available. It assumes that names are unique.
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Arguments:
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code the compiled regex
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stringname the name whose number is required
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Returns: the number of the named parentheses, or a negative number
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(PCRE2_ERROR_NOSUBSTRING) if not found
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*/
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_get_substring_number(const pcre2_code *code, PCRE2_SPTR stringname)
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{
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code=code;stringname=stringname;
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return PCRE2_ERROR_NOSUBSTRING;
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}
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/* End of pcre2_substring.c */
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