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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2025 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include "rgx.h"
#include "rgx_internal.h"
#include "strfmt.h"
RGX_CodeType *
rgxCompilePattern (
const RGX_CharacterType *characters, size_t length,
RGX_OptionsType options, RGX_OffsetType *offset,
int *error
) {
return pcre2_compile(
characters, length, options, error, offset, NULL
);
}
void
rgxDeallocateCode (RGX_CodeType *code) {
pcre2_code_free(code);
}
RGX_DataType *
rgxAllocateData (RGX_CodeType *code) {
return pcre2_match_data_create_from_pattern(code, NULL);
}
void
rgxDeallocateData (RGX_DataType *data) {
pcre2_match_data_free(data);
}
int
rgxMatchText (
const RGX_CharacterType *characters, size_t length,
RGX_CodeType *code, RGX_DataType *data,
RGX_OptionsType options, size_t *count, int *error
) {
int result = pcre2_match(
code, characters, length, 0, options, data, NULL
);
if (result < 0) {
*error = result;
return 0;
}
if (!result) result = pcre2_get_ovector_count(data);
*count = result - 1;
return 1;
}
int
rgxNameNumber (
RGX_CodeType *code, const RGX_CharacterType *name,
size_t *number, int *error
) {
int result = pcre2_substring_number_from_name(code, name);
if (result > 0) {
*number = result;
return 1;
} else {
*error = result;
return 0;
}
}
int
rgxCaptureBounds (
RGX_DataType *data, size_t number, size_t *from, size_t *to
) {
const RGX_OffsetType *offsets = pcre2_get_ovector_pointer(data);
offsets += number * 2;
if (offsets[0] == PCRE2_UNSET) return 0;
if (offsets[1] == PCRE2_UNSET) return 0;
*from = offsets[0];
*to = offsets[1];
return 1;
}
STR_BEGIN_FORMATTER(rgxFormatErrorMessage, int error)
size_t size = STR_LEFT;
RGX_CharacterType message[size];
int length = pcre2_get_error_message(error, message, size);
if (length > 0) {
for (unsigned int index=0; index<length; index+=1) {
STR_PRINTF("%"PRIwc, message[index]);
}
}
STR_END_FORMATTER
RGX_BEGIN_OPTION_MAP(rgxCompileOptions)
[RGX_COMPILE_ANCHOR_START] = PCRE2_ANCHORED,
[RGX_COMPILE_IGNORE_CASE] = PCRE2_CASELESS,
[RGX_COMPILE_UNICODE_PROPERTIES] = PCRE2_UCP,
RGX_END_OPTION_MAP(rgxCompileOptions)
RGX_BEGIN_OPTION_MAP(rgxMatchOptions)
[RGX_MATCH_ANCHOR_START] = PCRE2_ANCHORED,
RGX_END_OPTION_MAP(rgxMatchOptions)
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