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/*
* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "bits/regex_defs.h"
#include <stddef.h>
#include <sys/cdefs.h>
#include <sys/types.h>
__BEGIN_DECLS
typedef ssize_t regoff_t;
typedef struct {
void* __data;
// Number of capture groups, Dr.POSIX requires this.
size_t re_nsub;
} regex_t;
enum ReError {
REG_NOERR = __Regex_NoError,
REG_BADPAT = __Regex_InvalidPattern, // Invalid regular expression.
REG_ECOLLATE = __Regex_InvalidCollationElement, // Invalid collating element referenced.
REG_ECTYPE = __Regex_InvalidCharacterClass, // Invalid character class type referenced.
REG_EESCAPE = __Regex_InvalidTrailingEscape, // Trailing \ in pattern.
REG_ESUBREG = __Regex_InvalidNumber, // Number in \digit invalid or in error.
REG_EBRACK = __Regex_MismatchingBracket, // [ ] imbalance.
REG_EPAREN = __Regex_MismatchingParen, // \( \) or ( ) imbalance.
REG_EBRACE = __Regex_MismatchingBrace, // \{ \} imbalance.
REG_BADBR = __Regex_InvalidBraceContent, // Content of \{ \} invalid: not a number, number too large, more than two numbers, first larger than second.
REG_ERANGE = __Regex_InvalidRange, // Invalid endpoint in range expression.
REG_BADRPT = __Regex_InvalidRepetitionMarker, // ?, * or + not preceded by valid regular expression.
REG_EMPTY_EXPR = __Regex_EmptySubExpression, // Empty expression
REG_ENOSYS, // The implementation does not support the function.
REG_ESPACE, // Out of memory.
REG_NOMATCH, // regexec() failed to match.
};
typedef struct {
regoff_t rm_so; // byte offset from start of string to start of substring
regoff_t rm_eo; // byte offset from start of string of the first character after the end of substring
regoff_t rm_cnt; // number of matches
} regmatch_t;
// Values for the cflags parameter to the regcomp() function:
#define REG_EXTENDED __Regex_Extended // Use Extended Regular Expressions.
#define REG_ICASE __Regex_Insensitive // Ignore case in match.
#define REG_NOSUB __Regex_SkipSubExprResults // Report only success or fail in regexec().
#define REG_GLOBAL __Regex_Global // Don't stop searching for more match
#define REG_NEWLINE (__Regex_Multiline | REG_GLOBAL) // Change the handling of newline.
// Values for the eflags parameter to the regexec() function:
#define REG_NOTBOL __Regex_MatchNotBeginOfLine // The circumflex character (^), when taken as a special character, will not match the beginning of string.
#define REG_NOTEOL __Regex_MatchNotEndOfLine // The dollar sign ($), when taken as a special character, will not match the end of string.
#define REG_SEARCH __Regex_Last << 1
int regcomp(regex_t*, char const*, int);
int regexec(regex_t const*, char const*, size_t, regmatch_t[], int);
size_t regerror(int, regex_t const*, char*, size_t);
void regfree(regex_t*);
__END_DECLS
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