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d485cf29d7
This supports some binary property matching. It does not support any properties not yet parsed by LibUnicode, nor does it support value matching (such as Script_Extensions=Latin).
107 lines
6.6 KiB
C
107 lines
6.6 KiB
C
/*
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* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <stddef.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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typedef ssize_t regoff_t;
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typedef struct {
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void* __data;
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// Number of capture groups, Dr.POSIX requires this.
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size_t re_nsub;
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} regex_t;
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enum __Regex_Error {
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__Regex_NoError,
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__Regex_InvalidPattern, // Invalid regular expression.
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__Regex_InvalidCollationElement, // Invalid collating element referenced.
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__Regex_InvalidCharacterClass, // Invalid character class type referenced.
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__Regex_InvalidTrailingEscape, // Trailing \ in pattern.
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__Regex_InvalidNumber, // Number in \digit invalid or in error.
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__Regex_MismatchingBracket, // [ ] imbalance.
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__Regex_MismatchingParen, // ( ) imbalance.
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__Regex_MismatchingBrace, // { } imbalance.
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__Regex_InvalidBraceContent, // Content of {} invalid: not a number, number too large, more than two numbers, first larger than second.
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__Regex_InvalidBracketContent, // Content of [] invalid.
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__Regex_InvalidRange, // Invalid endpoint in range expression.
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__Regex_InvalidRepetitionMarker, // ?, * or + not preceded by valid regular expression.
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__Regex_ReachedMaxRecursion, // MaximumRecursion has been reached.
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__Regex_EmptySubExpression, // Sub expression has empty content.
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__Regex_InvalidCaptureGroup, // Content of capture group is invalid.
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__Regex_InvalidNameForCaptureGroup, // Name of capture group is invalid.
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__Regex_InvalidNameForProperty, // Name of property is invalid.
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};
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enum ReError {
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REG_NOERR = __Regex_NoError,
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REG_BADPAT = __Regex_InvalidPattern, // Invalid regular expression.
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REG_ECOLLATE = __Regex_InvalidCollationElement, // Invalid collating element referenced.
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REG_ECTYPE = __Regex_InvalidCharacterClass, // Invalid character class type referenced.
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REG_EESCAPE = __Regex_InvalidTrailingEscape, // Trailing \ in pattern.
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REG_ESUBREG = __Regex_InvalidNumber, // Number in \digit invalid or in error.
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REG_EBRACK = __Regex_MismatchingBracket, // [ ] imbalance.
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REG_EPAREN = __Regex_MismatchingParen, // \( \) or ( ) imbalance.
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REG_EBRACE = __Regex_MismatchingBrace, // \{ \} imbalance.
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REG_BADBR = __Regex_InvalidBraceContent, // Content of \{ \} invalid: not a number, number too large, more than two numbers, first larger than second.
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REG_ERANGE = __Regex_InvalidRange, // Invalid endpoint in range expression.
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REG_BADRPT = __Regex_InvalidRepetitionMarker, // ?, * or + not preceded by valid regular expression.
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REG_EMPTY_EXPR = __Regex_EmptySubExpression, // Empty expression
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REG_ENOSYS, // The implementation does not support the function.
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REG_ESPACE, // Out of memory.
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REG_NOMATCH, // regexec() failed to match.
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};
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typedef struct {
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regoff_t rm_so; // byte offset from start of string to start of substring
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regoff_t rm_eo; // byte offset from start of string of the first character after the end of substring
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regoff_t rm_cnt; // number of matches
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} regmatch_t;
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enum __RegexAllFlags {
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__Regex_Global = 1, // All matches (don't return after first match)
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__Regex_Insensitive = __Regex_Global << 1, // Case insensitive match (ignores case of [a-zA-Z])
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__Regex_Ungreedy = __Regex_Global << 2, // The match becomes lazy by default. Now a ? following a quantifier makes it greedy
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__Regex_Unicode = __Regex_Global << 3, // Enable all unicode features and interpret all unicode escape sequences as such
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__Regex_Extended = __Regex_Global << 4, // Ignore whitespaces. Spaces and text after a # in the pattern are ignored
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__Regex_Extra = __Regex_Global << 5, // Disallow meaningless escapes. A \ followed by a letter with no special meaning is faulted
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__Regex_MatchNotBeginOfLine = __Regex_Global << 6, // Pattern is not forced to ^ -> search in whole string!
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__Regex_MatchNotEndOfLine = __Regex_Global << 7, // Don't Force the dollar sign, $, to always match end of the string, instead of end of the line. This option is ignored if the Multiline-flag is set
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__Regex_SkipSubExprResults = __Regex_Global << 8, // Do not return sub expressions in the result
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__Regex_StringCopyMatches = __Regex_Global << 9, // Do explicitly copy results into new allocated string instead of StringView to original string.
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__Regex_SingleLine = __Regex_Global << 10, // Dot matches newline characters
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__Regex_Sticky = __Regex_Global << 11, // Force the pattern to only match consecutive matches from where the previous match ended.
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__Regex_Multiline = __Regex_Global << 12, // Handle newline characters. Match each line, one by one.
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__Regex_SkipTrimEmptyMatches = __Regex_Global << 13, // Do not remove empty capture group results.
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__Regex_Internal_Stateful = __Regex_Global << 14, // Internal flag; enables stateful matches.
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__Regex_Internal_BrowserExtended = __Regex_Global << 15, // Internal flag; enable browser-specific ECMA262 extensions.
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__Regex_Last = __Regex_SkipTrimEmptyMatches
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};
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// Values for the cflags parameter to the regcomp() function:
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#define REG_EXTENDED __Regex_Extended // Use Extended Regular Expressions.
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#define REG_ICASE __Regex_Insensitive // Ignore case in match.
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#define REG_NOSUB __Regex_SkipSubExprResults // Report only success or fail in regexec().
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#define REG_GLOBAL __Regex_Global // Don't stop searching for more match
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#define REG_NEWLINE (__Regex_Multiline | REG_GLOBAL) // Change the handling of newline.
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// Values for the eflags parameter to the regexec() function:
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#define REG_NOTBOL __Regex_MatchNotBeginOfLine // The circumflex character (^), when taken as a special character, will not match the beginning of string.
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#define REG_NOTEOL __Regex_MatchNotEndOfLine // The dollar sign ($), when taken as a special character, will not match the end of string.
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//static_assert (sizeof(FlagsUnderlyingType) * 8 >= regex::POSIXFlags::Last << 1), "flags type too small")
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#define REG_SEARCH __Regex_Last << 1
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int regcomp(regex_t*, const char*, int);
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int regexec(const regex_t*, const char*, size_t, regmatch_t[], int);
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size_t regerror(int, const regex_t*, char*, size_t);
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void regfree(regex_t*);
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__END_DECLS
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