1615 lines
72 KiB
C
1615 lines
72 KiB
C
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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**********************************************************************
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* Copyright (C) 2004-2016, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* file name: uregex.h
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* encoding: UTF-8
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* indentation:4
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*
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* created on: 2004mar09
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* created by: Andy Heninger
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*
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* ICU Regular Expressions, API for C
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*/
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/**
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* \file
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* \brief C API: Regular Expressions
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*
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* <p>This is a C wrapper around the C++ RegexPattern and RegexMatcher classes.</p>
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*/
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#ifndef UREGEX_H
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#define UREGEX_H
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#include "unicode/utext.h"
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_REGULAR_EXPRESSIONS
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#include "unicode/localpointer.h"
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#include "unicode/parseerr.h"
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struct URegularExpression;
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/**
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* Structure representing a compiled regular expression, plus the results
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* of a match operation.
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* @stable ICU 3.0
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*/
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typedef struct URegularExpression URegularExpression;
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/**
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* Constants for Regular Expression Match Modes.
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* @stable ICU 2.4
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*/
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typedef enum URegexpFlag{
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#ifndef U_HIDE_DRAFT_API
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/** Forces normalization of pattern and strings.
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Not implemented yet, just a placeholder, hence draft.
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@draft ICU 2.4 */
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UREGEX_CANON_EQ = 128,
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#endif /* U_HIDE_DRAFT_API */
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/** Enable case insensitive matching. @stable ICU 2.4 */
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UREGEX_CASE_INSENSITIVE = 2,
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/** Allow white space and comments within patterns @stable ICU 2.4 */
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UREGEX_COMMENTS = 4,
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/** If set, '.' matches line terminators, otherwise '.' matching stops at line end.
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* @stable ICU 2.4 */
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UREGEX_DOTALL = 32,
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/** If set, treat the entire pattern as a literal string.
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* Metacharacters or escape sequences in the input sequence will be given
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* no special meaning.
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*
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* The flag UREGEX_CASE_INSENSITIVE retains its impact
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* on matching when used in conjunction with this flag.
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* The other flags become superfluous.
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*
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* @stable ICU 4.0
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*/
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UREGEX_LITERAL = 16,
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/** Control behavior of "$" and "^"
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* If set, recognize line terminators within string,
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* otherwise, match only at start and end of input string.
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* @stable ICU 2.4 */
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UREGEX_MULTILINE = 8,
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/** Unix-only line endings.
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* When this mode is enabled, only \\u000a is recognized as a line ending
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* in the behavior of ., ^, and $.
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* @stable ICU 4.0
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*/
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UREGEX_UNIX_LINES = 1,
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/** Unicode word boundaries.
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* If set, \b uses the Unicode TR 29 definition of word boundaries.
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* Warning: Unicode word boundaries are quite different from
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* traditional regular expression word boundaries. See
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* http://unicode.org/reports/tr29/#Word_Boundaries
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* @stable ICU 2.8
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*/
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UREGEX_UWORD = 256,
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/** Error on Unrecognized backslash escapes.
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* If set, fail with an error on patterns that contain
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* backslash-escaped ASCII letters without a known special
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* meaning. If this flag is not set, these
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* escaped letters represent themselves.
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* @stable ICU 4.0
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*/
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UREGEX_ERROR_ON_UNKNOWN_ESCAPES = 512
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} URegexpFlag;
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/**
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* Open (compile) an ICU regular expression. Compiles the regular expression in
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* string form into an internal representation using the specified match mode flags.
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* The resulting regular expression handle can then be used to perform various
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* matching operations.
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*
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*
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* @param pattern The Regular Expression pattern to be compiled.
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* @param patternLength The length of the pattern, or -1 if the pattern is
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* NUL terminated.
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* @param flags Flags that alter the default matching behavior for
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* the regular expression, UREGEX_CASE_INSENSITIVE, for
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* example. For default behavior, set this parameter to zero.
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* See <code>enum URegexpFlag</code>. All desired flags
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* are bitwise-ORed together.
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* @param pe Receives the position (line and column numbers) of any syntax
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* error within the source regular expression string. If this
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* information is not wanted, pass NULL for this parameter.
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* @param status Receives error detected by this function.
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* @stable ICU 3.0
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*
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*/
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U_STABLE URegularExpression * U_EXPORT2
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uregex_open( const UChar *pattern,
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int32_t patternLength,
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uint32_t flags,
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UParseError *pe,
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UErrorCode *status);
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/**
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* Open (compile) an ICU regular expression. Compiles the regular expression in
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* string form into an internal representation using the specified match mode flags.
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* The resulting regular expression handle can then be used to perform various
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* matching operations.
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* <p>
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* The contents of the pattern UText will be extracted and saved. Ownership of the
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* UText struct itself remains with the caller. This is to match the behavior of
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* uregex_open().
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*
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* @param pattern The Regular Expression pattern to be compiled.
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* @param flags Flags that alter the default matching behavior for
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* the regular expression, UREGEX_CASE_INSENSITIVE, for
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* example. For default behavior, set this parameter to zero.
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* See <code>enum URegexpFlag</code>. All desired flags
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* are bitwise-ORed together.
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* @param pe Receives the position (line and column numbers) of any syntax
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* error within the source regular expression string. If this
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* information is not wanted, pass NULL for this parameter.
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* @param status Receives error detected by this function.
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*
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* @stable ICU 4.6
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*/
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U_STABLE URegularExpression * U_EXPORT2
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uregex_openUText(UText *pattern,
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uint32_t flags,
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UParseError *pe,
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UErrorCode *status);
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/**
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* Open (compile) an ICU regular expression. The resulting regular expression
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* handle can then be used to perform various matching operations.
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* <p>
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* This function is the same as uregex_open, except that the pattern
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* is supplied as an 8 bit char * string in the default code page.
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*
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* @param pattern The Regular Expression pattern to be compiled,
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* NUL terminated.
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* @param flags Flags that alter the default matching behavior for
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* the regular expression, UREGEX_CASE_INSENSITIVE, for
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* example. For default behavior, set this parameter to zero.
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* See <code>enum URegexpFlag</code>. All desired flags
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* are bitwise-ORed together.
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* @param pe Receives the position (line and column numbers) of any syntax
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* error within the source regular expression string. If this
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* information is not wanted, pass NULL for this parameter.
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* @param status Receives errors detected by this function.
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* @return The URegularExpression object representing the compiled
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* pattern.
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*
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* @stable ICU 3.0
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*/
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#if !UCONFIG_NO_CONVERSION
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U_STABLE URegularExpression * U_EXPORT2
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uregex_openC( const char *pattern,
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uint32_t flags,
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UParseError *pe,
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UErrorCode *status);
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#endif
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/**
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* Close the regular expression, recovering all resources (memory) it
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* was holding.
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*
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* @param regexp The regular expression to be closed.
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* @stable ICU 3.0
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*/
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U_STABLE void U_EXPORT2
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uregex_close(URegularExpression *regexp);
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#if U_SHOW_CPLUSPLUS_API
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U_NAMESPACE_BEGIN
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/**
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* \class LocalURegularExpressionPointer
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* "Smart pointer" class, closes a URegularExpression via uregex_close().
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* For most methods see the LocalPointerBase base class.
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*
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* @see LocalPointerBase
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* @see LocalPointer
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* @stable ICU 4.4
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*/
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U_DEFINE_LOCAL_OPEN_POINTER(LocalURegularExpressionPointer, URegularExpression, uregex_close);
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U_NAMESPACE_END
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#endif
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/**
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* Make a copy of a compiled regular expression. Cloning a regular
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* expression is faster than opening a second instance from the source
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* form of the expression, and requires less memory.
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* <p>
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* Note that the current input string and the position of any matched text
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* within it are not cloned; only the pattern itself and the
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* match mode flags are copied.
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* <p>
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* Cloning can be particularly useful to threaded applications that perform
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* multiple match operations in parallel. Each concurrent RE
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* operation requires its own instance of a URegularExpression.
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*
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* @param regexp The compiled regular expression to be cloned.
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* @param status Receives indication of any errors encountered
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* @return the cloned copy of the compiled regular expression.
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* @stable ICU 3.0
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*/
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U_STABLE URegularExpression * U_EXPORT2
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uregex_clone(const URegularExpression *regexp, UErrorCode *status);
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/**
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* Returns a pointer to the source form of the pattern for this regular expression.
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* This function will work even if the pattern was originally specified as a UText.
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*
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* @param regexp The compiled regular expression.
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* @param patLength This output parameter will be set to the length of the
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* pattern string. A NULL pointer may be used here if the
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* pattern length is not needed, as would be the case if
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* the pattern is known in advance to be a NUL terminated
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* string.
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* @param status Receives errors detected by this function.
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* @return a pointer to the pattern string. The storage for the string is
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* owned by the regular expression object, and must not be
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* altered or deleted by the application. The returned string
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* will remain valid until the regular expression is closed.
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* @stable ICU 3.0
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*/
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U_STABLE const UChar * U_EXPORT2
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uregex_pattern(const URegularExpression *regexp,
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int32_t *patLength,
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UErrorCode *status);
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/**
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* Returns the source text of the pattern for this regular expression.
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* This function will work even if the pattern was originally specified as a UChar string.
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*
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* @param regexp The compiled regular expression.
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* @param status Receives errors detected by this function.
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* @return the pattern text. The storage for the text is owned by the regular expression
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* object, and must not be altered or deleted.
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*
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* @stable ICU 4.6
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*/
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U_STABLE UText * U_EXPORT2
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uregex_patternUText(const URegularExpression *regexp,
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UErrorCode *status);
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/**
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* Get the match mode flags that were specified when compiling this regular expression.
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* @param status Receives errors detected by this function.
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* @param regexp The compiled regular expression.
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* @return The match mode flags
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* @see URegexpFlag
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* @stable ICU 3.0
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*/
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U_STABLE int32_t U_EXPORT2
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uregex_flags(const URegularExpression *regexp,
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UErrorCode *status);
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/**
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* Set the subject text string upon which the regular expression will look for matches.
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* This function may be called any number of times, allowing the regular
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* expression pattern to be applied to different strings.
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* <p>
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* Regular expression matching operations work directly on the application's
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* string data. No copy is made. The subject string data must not be
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* altered after calling this function until after all regular expression
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* operations involving this string data are completed.
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* <p>
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* Zero length strings are permitted. In this case, no subsequent match
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* operation will dereference the text string pointer.
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*
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* @param regexp The compiled regular expression.
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* @param text The subject text string.
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* @param textLength The length of the subject text, or -1 if the string
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* is NUL terminated.
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* @param status Receives errors detected by this function.
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* @stable ICU 3.0
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*/
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U_STABLE void U_EXPORT2
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uregex_setText(URegularExpression *regexp,
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const UChar *text,
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int32_t textLength,
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UErrorCode *status);
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/**
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* Set the subject text string upon which the regular expression will look for matches.
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* This function may be called any number of times, allowing the regular
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* expression pattern to be applied to different strings.
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* <p>
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* Regular expression matching operations work directly on the application's
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* string data; only a shallow clone is made. The subject string data must not be
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* altered after calling this function until after all regular expression
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* operations involving this string data are completed.
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*
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* @param regexp The compiled regular expression.
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* @param text The subject text string.
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* @param status Receives errors detected by this function.
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*
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* @stable ICU 4.6
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*/
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U_STABLE void U_EXPORT2
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uregex_setUText(URegularExpression *regexp,
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UText *text,
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UErrorCode *status);
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/**
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* Get the subject text that is currently associated with this
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* regular expression object. If the input was supplied using uregex_setText(),
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* that pointer will be returned. Otherwise, the characters in the input will
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* be extracted to a buffer and returned. In either case, ownership remains
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* with the regular expression object.
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*
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* This function will work even if the input was originally specified as a UText.
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*
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* @param regexp The compiled regular expression.
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* @param textLength The length of the string is returned in this output parameter.
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* A NULL pointer may be used here if the
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* text length is not needed, as would be the case if
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* the text is known in advance to be a NUL terminated
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* string.
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* @param status Receives errors detected by this function.
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* @return Pointer to the subject text string currently associated with
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* this regular expression.
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* @stable ICU 3.0
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*/
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U_STABLE const UChar * U_EXPORT2
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uregex_getText(URegularExpression *regexp,
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int32_t *textLength,
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UErrorCode *status);
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/**
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* Get the subject text that is currently associated with this
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* regular expression object.
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*
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* This function will work even if the input was originally specified as a UChar string.
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*
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* @param regexp The compiled regular expression.
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* @param dest A mutable UText in which to store the current input.
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* If NULL, a new UText will be created as an immutable shallow clone
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* of the actual input string.
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* @param status Receives errors detected by this function.
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* @return The subject text currently associated with this regular expression.
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* If a pre-allocated UText was provided, it will always be used and returned.
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*
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* @stable ICU 4.6
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*/
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U_STABLE UText * U_EXPORT2
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uregex_getUText(URegularExpression *regexp,
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UText *dest,
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UErrorCode *status);
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/**
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* Set the subject text string upon which the regular expression is looking for matches
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* without changing any other aspect of the matching state.
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* The new and previous text strings must have the same content.
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*
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* This function is intended for use in environments where ICU is operating on
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* strings that may move around in memory. It provides a mechanism for notifying
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* ICU that the string has been relocated, and providing a new UText to access the
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* string in its new position.
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*
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* Note that the regular expression implementation never copies the underlying text
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* of a string being matched, but always operates directly on the original text
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* provided by the user. Refreshing simply drops the references to the old text
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* and replaces them with references to the new.
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*
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* Caution: this function is normally used only by very specialized
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* system-level code. One example use case is with garbage collection
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* that moves the text in memory.
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*
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* @param regexp The compiled regular expression.
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* @param text The new (moved) text string.
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* @param status Receives errors detected by this function.
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*
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* @stable ICU 4.8
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*/
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U_STABLE void U_EXPORT2
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uregex_refreshUText(URegularExpression *regexp,
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UText *text,
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UErrorCode *status);
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/**
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* Attempts to match the input string against the pattern.
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* To succeed, the match must extend to the end of the string,
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* or cover the complete match region.
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*
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* If startIndex >= zero the match operation starts at the specified
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* index and must extend to the end of the input string. Any region
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* that has been specified is reset.
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*
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* If startIndex == -1 the match must cover the input region, or the entire
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* input string if no region has been set. This directly corresponds to
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* Matcher.matches() in Java
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*
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* @param regexp The compiled regular expression.
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* @param startIndex The input string (native) index at which to begin matching, or -1
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* to match the input Region.
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* @param status Receives errors detected by this function.
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* @return TRUE if there is a match
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* @stable ICU 3.0
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*/
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U_STABLE UBool U_EXPORT2
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uregex_matches(URegularExpression *regexp,
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int32_t startIndex,
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UErrorCode *status);
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/**
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* 64bit version of uregex_matches.
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* Attempts to match the input string against the pattern.
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* To succeed, the match must extend to the end of the string,
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* or cover the complete match region.
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*
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* If startIndex >= zero the match operation starts at the specified
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* index and must extend to the end of the input string. Any region
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* that has been specified is reset.
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*
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* If startIndex == -1 the match must cover the input region, or the entire
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* input string if no region has been set. This directly corresponds to
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* Matcher.matches() in Java
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*
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* @param regexp The compiled regular expression.
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* @param startIndex The input string (native) index at which to begin matching, or -1
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* to match the input Region.
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* @param status Receives errors detected by this function.
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* @return TRUE if there is a match
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* @stable ICU 4.6
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*/
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U_STABLE UBool U_EXPORT2
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uregex_matches64(URegularExpression *regexp,
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int64_t startIndex,
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UErrorCode *status);
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/**
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* Attempts to match the input string, starting from the specified index, against the pattern.
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* The match may be of any length, and is not required to extend to the end
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* of the input string. Contrast with uregex_matches().
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*
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* <p>If startIndex is >= 0 any input region that was set for this
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* URegularExpression is reset before the operation begins.
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*
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* <p>If the specified starting index == -1 the match begins at the start of the input
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* region, or at the start of the full string if no region has been specified.
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* This corresponds directly with Matcher.lookingAt() in Java.
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*
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* <p>If the match succeeds then more information can be obtained via the
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* <code>uregexp_start()</code>, <code>uregexp_end()</code>,
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* and <code>uregex_group()</code> functions.</p>
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*
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* @param regexp The compiled regular expression.
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* @param startIndex The input string (native) index at which to begin matching, or
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* -1 to match the Input Region
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* @param status A reference to a UErrorCode to receive any errors.
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* @return TRUE if there is a match.
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* @stable ICU 3.0
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*/
|
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U_STABLE UBool U_EXPORT2
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uregex_lookingAt(URegularExpression *regexp,
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int32_t startIndex,
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|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_lookingAt.
|
|
* Attempts to match the input string, starting from the specified index, against the pattern.
|
|
* The match may be of any length, and is not required to extend to the end
|
|
* of the input string. Contrast with uregex_matches().
|
|
*
|
|
* <p>If startIndex is >= 0 any input region that was set for this
|
|
* URegularExpression is reset before the operation begins.
|
|
*
|
|
* <p>If the specified starting index == -1 the match begins at the start of the input
|
|
* region, or at the start of the full string if no region has been specified.
|
|
* This corresponds directly with Matcher.lookingAt() in Java.
|
|
*
|
|
* <p>If the match succeeds then more information can be obtained via the
|
|
* <code>uregexp_start()</code>, <code>uregexp_end()</code>,
|
|
* and <code>uregex_group()</code> functions.</p>
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param startIndex The input string (native) index at which to begin matching, or
|
|
* -1 to match the Input Region
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return TRUE if there is a match.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_lookingAt64(URegularExpression *regexp,
|
|
int64_t startIndex,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Find the first matching substring of the input string that matches the pattern.
|
|
* If startIndex is >= zero the search for a match begins at the specified index,
|
|
* and any match region is reset. This corresponds directly with
|
|
* Matcher.find(startIndex) in Java.
|
|
*
|
|
* If startIndex == -1 the search begins at the start of the input region,
|
|
* or at the start of the full string if no region has been specified.
|
|
*
|
|
* If a match is found, <code>uregex_start(), uregex_end()</code>, and
|
|
* <code>uregex_group()</code> will provide more information regarding the match.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param startIndex The position (native) in the input string to begin the search, or
|
|
* -1 to search within the Input Region.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return TRUE if a match is found.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_find(URegularExpression *regexp,
|
|
int32_t startIndex,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_find.
|
|
* Find the first matching substring of the input string that matches the pattern.
|
|
* If startIndex is >= zero the search for a match begins at the specified index,
|
|
* and any match region is reset. This corresponds directly with
|
|
* Matcher.find(startIndex) in Java.
|
|
*
|
|
* If startIndex == -1 the search begins at the start of the input region,
|
|
* or at the start of the full string if no region has been specified.
|
|
*
|
|
* If a match is found, <code>uregex_start(), uregex_end()</code>, and
|
|
* <code>uregex_group()</code> will provide more information regarding the match.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param startIndex The position (native) in the input string to begin the search, or
|
|
* -1 to search within the Input Region.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return TRUE if a match is found.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_find64(URegularExpression *regexp,
|
|
int64_t startIndex,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Find the next pattern match in the input string. Begin searching
|
|
* the input at the location following the end of he previous match,
|
|
* or at the start of the string (or region) if there is no
|
|
* previous match. If a match is found, <code>uregex_start(), uregex_end()</code>, and
|
|
* <code>uregex_group()</code> will provide more information regarding the match.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return TRUE if a match is found.
|
|
* @see uregex_reset
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_findNext(URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Get the number of capturing groups in this regular expression's pattern.
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return the number of capture groups
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_groupCount(URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Get the group number corresponding to a named capture group.
|
|
* The returned number can be used with any function that access
|
|
* capture groups by number.
|
|
*
|
|
* The function returns an error status if the specified name does not
|
|
* appear in the pattern.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupName The capture group name.
|
|
* @param nameLength The length of the name, or -1 if the name is a
|
|
* nul-terminated string.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
*
|
|
* @stable ICU 55
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_groupNumberFromName(URegularExpression *regexp,
|
|
const UChar *groupName,
|
|
int32_t nameLength,
|
|
UErrorCode *status);
|
|
|
|
|
|
/**
|
|
* Get the group number corresponding to a named capture group.
|
|
* The returned number can be used with any function that access
|
|
* capture groups by number.
|
|
*
|
|
* The function returns an error status if the specified name does not
|
|
* appear in the pattern.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupName The capture group name,
|
|
* platform invariant characters only.
|
|
* @param nameLength The length of the name, or -1 if the name is
|
|
* nul-terminated.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
*
|
|
* @stable ICU 55
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_groupNumberFromCName(URegularExpression *regexp,
|
|
const char *groupName,
|
|
int32_t nameLength,
|
|
UErrorCode *status);
|
|
|
|
/** Extract the string for the specified matching expression or subexpression.
|
|
* Group #0 is the complete string of matched text.
|
|
* Group #1 is the text matched by the first set of capturing parentheses.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupNum The capture group to extract. Group 0 is the complete
|
|
* match. The value of this parameter must be
|
|
* less than or equal to the number of capture groups in
|
|
* the pattern.
|
|
* @param dest Buffer to receive the matching string data
|
|
* @param destCapacity Capacity of the dest buffer.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return Length of matching data,
|
|
* or -1 if no applicable match.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_group(URegularExpression *regexp,
|
|
int32_t groupNum,
|
|
UChar *dest,
|
|
int32_t destCapacity,
|
|
UErrorCode *status);
|
|
|
|
/** Returns a shallow immutable clone of the entire input string with the current index set
|
|
* to the beginning of the requested capture group. The capture group length is also
|
|
* returned via groupLength.
|
|
* Group #0 is the complete string of matched text.
|
|
* Group #1 is the text matched by the first set of capturing parentheses.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupNum The capture group to extract. Group 0 is the complete
|
|
* match. The value of this parameter must be
|
|
* less than or equal to the number of capture groups in
|
|
* the pattern.
|
|
* @param dest A mutable UText in which to store the current input.
|
|
* If NULL, a new UText will be created as an immutable shallow clone
|
|
* of the entire input string.
|
|
* @param groupLength The group length of the desired capture group. Output parameter.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return The subject text currently associated with this regular expression.
|
|
* If a pre-allocated UText was provided, it will always be used and returned.
|
|
|
|
*
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE UText * U_EXPORT2
|
|
uregex_groupUText(URegularExpression *regexp,
|
|
int32_t groupNum,
|
|
UText *dest,
|
|
int64_t *groupLength,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Returns the index in the input string of the start of the text matched by the
|
|
* specified capture group during the previous match operation. Return -1 if
|
|
* the capture group was not part of the last match.
|
|
* Group #0 refers to the complete range of matched text.
|
|
* Group #1 refers to the text matched by the first set of capturing parentheses.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupNum The capture group number
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return the starting (native) position in the input of the text matched
|
|
* by the specified group.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_start(URegularExpression *regexp,
|
|
int32_t groupNum,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_start.
|
|
* Returns the index in the input string of the start of the text matched by the
|
|
* specified capture group during the previous match operation. Return -1 if
|
|
* the capture group was not part of the last match.
|
|
* Group #0 refers to the complete range of matched text.
|
|
* Group #1 refers to the text matched by the first set of capturing parentheses.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupNum The capture group number
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return the starting (native) position in the input of the text matched
|
|
* by the specified group.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE int64_t U_EXPORT2
|
|
uregex_start64(URegularExpression *regexp,
|
|
int32_t groupNum,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Returns the index in the input string of the position following the end
|
|
* of the text matched by the specified capture group.
|
|
* Return -1 if the capture group was not part of the last match.
|
|
* Group #0 refers to the complete range of matched text.
|
|
* Group #1 refers to the text matched by the first set of capturing parentheses.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupNum The capture group number
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return the (native) index of the position following the last matched character.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_end(URegularExpression *regexp,
|
|
int32_t groupNum,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_end.
|
|
* Returns the index in the input string of the position following the end
|
|
* of the text matched by the specified capture group.
|
|
* Return -1 if the capture group was not part of the last match.
|
|
* Group #0 refers to the complete range of matched text.
|
|
* Group #1 refers to the text matched by the first set of capturing parentheses.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param groupNum The capture group number
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return the (native) index of the position following the last matched character.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE int64_t U_EXPORT2
|
|
uregex_end64(URegularExpression *regexp,
|
|
int32_t groupNum,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Reset any saved state from the previous match. Has the effect of
|
|
* causing uregex_findNext to begin at the specified index, and causing
|
|
* uregex_start(), uregex_end() and uregex_group() to return an error
|
|
* indicating that there is no match information available. Clears any
|
|
* match region that may have been set.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param index The position (native) in the text at which a
|
|
* uregex_findNext() should begin searching.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_reset(URegularExpression *regexp,
|
|
int32_t index,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_reset.
|
|
* Reset any saved state from the previous match. Has the effect of
|
|
* causing uregex_findNext to begin at the specified index, and causing
|
|
* uregex_start(), uregex_end() and uregex_group() to return an error
|
|
* indicating that there is no match information available. Clears any
|
|
* match region that may have been set.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param index The position (native) in the text at which a
|
|
* uregex_findNext() should begin searching.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_reset64(URegularExpression *regexp,
|
|
int64_t index,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Sets the limits of the matching region for this URegularExpression.
|
|
* The region is the part of the input string that will be considered when matching.
|
|
* Invoking this method resets any saved state from the previous match,
|
|
* then sets the region to start at the index specified by the start parameter
|
|
* and end at the index specified by the end parameter.
|
|
*
|
|
* Depending on the transparency and anchoring being used (see useTransparentBounds
|
|
* and useAnchoringBounds), certain constructs such as anchors may behave differently
|
|
* at or around the boundaries of the region
|
|
*
|
|
* The function will fail if start is greater than limit, or if either index
|
|
* is less than zero or greater than the length of the string being matched.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param regionStart The (native) index to begin searches at.
|
|
* @param regionLimit The (native) index to end searches at (exclusive).
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setRegion(URegularExpression *regexp,
|
|
int32_t regionStart,
|
|
int32_t regionLimit,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_setRegion.
|
|
* Sets the limits of the matching region for this URegularExpression.
|
|
* The region is the part of the input string that will be considered when matching.
|
|
* Invoking this method resets any saved state from the previous match,
|
|
* then sets the region to start at the index specified by the start parameter
|
|
* and end at the index specified by the end parameter.
|
|
*
|
|
* Depending on the transparency and anchoring being used (see useTransparentBounds
|
|
* and useAnchoringBounds), certain constructs such as anchors may behave differently
|
|
* at or around the boundaries of the region
|
|
*
|
|
* The function will fail if start is greater than limit, or if either index
|
|
* is less than zero or greater than the length of the string being matched.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param regionStart The (native) index to begin searches at.
|
|
* @param regionLimit The (native) index to end searches at (exclusive).
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setRegion64(URegularExpression *regexp,
|
|
int64_t regionStart,
|
|
int64_t regionLimit,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Set the matching region and the starting index for subsequent matches
|
|
* in a single operation.
|
|
* This is useful because the usual function for setting the starting
|
|
* index, urgex_reset(), also resets any region limits.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param regionStart The (native) index to begin searches at.
|
|
* @param regionLimit The (native) index to end searches at (exclusive).
|
|
* @param startIndex The index in the input text at which the next
|
|
* match operation should begin.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setRegionAndStart(URegularExpression *regexp,
|
|
int64_t regionStart,
|
|
int64_t regionLimit,
|
|
int64_t startIndex,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Reports the start index of the matching region. Any matches found are limited to
|
|
* to the region bounded by regionStart (inclusive) and regionEnd (exclusive).
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return The starting (native) index of this matcher's region.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_regionStart(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_regionStart.
|
|
* Reports the start index of the matching region. Any matches found are limited to
|
|
* to the region bounded by regionStart (inclusive) and regionEnd (exclusive).
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return The starting (native) index of this matcher's region.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE int64_t U_EXPORT2
|
|
uregex_regionStart64(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Reports the end index (exclusive) of the matching region for this URegularExpression.
|
|
* Any matches found are limited to to the region bounded by regionStart (inclusive)
|
|
* and regionEnd (exclusive).
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return The ending point (native) of this matcher's region.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_regionEnd(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* 64bit version of uregex_regionEnd.
|
|
* Reports the end index (exclusive) of the matching region for this URegularExpression.
|
|
* Any matches found are limited to to the region bounded by regionStart (inclusive)
|
|
* and regionEnd (exclusive).
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return The ending point (native) of this matcher's region.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE int64_t U_EXPORT2
|
|
uregex_regionEnd64(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Queries the transparency of region bounds for this URegularExpression.
|
|
* See useTransparentBounds for a description of transparent and opaque bounds.
|
|
* By default, matching boundaries are opaque.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return TRUE if this matcher is using opaque bounds, false if it is not.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_hasTransparentBounds(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
|
|
/**
|
|
* Sets the transparency of region bounds for this URegularExpression.
|
|
* Invoking this function with an argument of TRUE will set matches to use transparent bounds.
|
|
* If the boolean argument is FALSE, then opaque bounds will be used.
|
|
*
|
|
* Using transparent bounds, the boundaries of the matching region are transparent
|
|
* to lookahead, lookbehind, and boundary matching constructs. Those constructs can
|
|
* see text beyond the boundaries of the region while checking for a match.
|
|
*
|
|
* With opaque bounds, no text outside of the matching region is visible to lookahead,
|
|
* lookbehind, and boundary matching constructs.
|
|
*
|
|
* By default, opaque bounds are used.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param b TRUE for transparent bounds; FALSE for opaque bounds
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.0
|
|
**/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_useTransparentBounds(URegularExpression *regexp,
|
|
UBool b,
|
|
UErrorCode *status);
|
|
|
|
|
|
/**
|
|
* Return true if this URegularExpression is using anchoring bounds.
|
|
* By default, anchoring region bounds are used.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return TRUE if this matcher is using anchoring bounds.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_hasAnchoringBounds(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
|
|
/**
|
|
* Set whether this URegularExpression is using Anchoring Bounds for its region.
|
|
* With anchoring bounds, pattern anchors such as ^ and $ will match at the start
|
|
* and end of the region. Without Anchoring Bounds, anchors will only match at
|
|
* the positions they would in the complete text.
|
|
*
|
|
* Anchoring Bounds are the default for regions.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param b TRUE if to enable anchoring bounds; FALSE to disable them.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_useAnchoringBounds(URegularExpression *regexp,
|
|
UBool b,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Return TRUE if the most recent matching operation touched the
|
|
* end of the text being processed. In this case, additional input text could
|
|
* change the results of that match.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return TRUE if the most recent match hit the end of input
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_hitEnd(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Return TRUE the most recent match succeeded and additional input could cause
|
|
* it to fail. If this function returns false and a match was found, then more input
|
|
* might change the match but the match won't be lost. If a match was not found,
|
|
* then requireEnd has no meaning.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A pointer to a UErrorCode to receive any errors.
|
|
* @return TRUE if more input could cause the most recent match to no longer match.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE UBool U_EXPORT2
|
|
uregex_requireEnd(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Replaces every substring of the input that matches the pattern
|
|
* with the given replacement string. This is a convenience function that
|
|
* provides a complete find-and-replace-all operation.
|
|
*
|
|
* This method scans the input string looking for matches of the pattern.
|
|
* Input that is not part of any match is copied unchanged to the
|
|
* destination buffer. Matched regions are replaced in the output
|
|
* buffer by the replacement string. The replacement string may contain
|
|
* references to capture groups; these take the form of $1, $2, etc.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param replacementText A string containing the replacement text.
|
|
* @param replacementLength The length of the replacement string, or
|
|
* -1 if it is NUL terminated.
|
|
* @param destBuf A (UChar *) buffer that will receive the result.
|
|
* @param destCapacity The capacity of the destination buffer.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return The length of the string resulting from the find
|
|
* and replace operation. In the event that the
|
|
* destination capacity is inadequate, the return value
|
|
* is still the full length of the untruncated string.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_replaceAll(URegularExpression *regexp,
|
|
const UChar *replacementText,
|
|
int32_t replacementLength,
|
|
UChar *destBuf,
|
|
int32_t destCapacity,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Replaces every substring of the input that matches the pattern
|
|
* with the given replacement string. This is a convenience function that
|
|
* provides a complete find-and-replace-all operation.
|
|
*
|
|
* This method scans the input string looking for matches of the pattern.
|
|
* Input that is not part of any match is copied unchanged to the
|
|
* destination buffer. Matched regions are replaced in the output
|
|
* buffer by the replacement string. The replacement string may contain
|
|
* references to capture groups; these take the form of $1, $2, etc.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param replacement A string containing the replacement text.
|
|
* @param dest A mutable UText that will receive the result.
|
|
* If NULL, a new UText will be created (which may not be mutable).
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return A UText containing the results of the find and replace.
|
|
* If a pre-allocated UText was provided, it will always be used and returned.
|
|
*
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE UText * U_EXPORT2
|
|
uregex_replaceAllUText(URegularExpression *regexp,
|
|
UText *replacement,
|
|
UText *dest,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Replaces the first substring of the input that matches the pattern
|
|
* with the given replacement string. This is a convenience function that
|
|
* provides a complete find-and-replace operation.
|
|
*
|
|
* This method scans the input string looking for a match of the pattern.
|
|
* All input that is not part of the match is copied unchanged to the
|
|
* destination buffer. The matched region is replaced in the output
|
|
* buffer by the replacement string. The replacement string may contain
|
|
* references to capture groups; these take the form of $1, $2, etc.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param replacementText A string containing the replacement text.
|
|
* @param replacementLength The length of the replacement string, or
|
|
* -1 if it is NUL terminated.
|
|
* @param destBuf A (UChar *) buffer that will receive the result.
|
|
* @param destCapacity The capacity of the destination buffer.
|
|
* @param status a reference to a UErrorCode to receive any errors.
|
|
* @return The length of the string resulting from the find
|
|
* and replace operation. In the event that the
|
|
* destination capacity is inadequate, the return value
|
|
* is still the full length of the untruncated string.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_replaceFirst(URegularExpression *regexp,
|
|
const UChar *replacementText,
|
|
int32_t replacementLength,
|
|
UChar *destBuf,
|
|
int32_t destCapacity,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Replaces the first substring of the input that matches the pattern
|
|
* with the given replacement string. This is a convenience function that
|
|
* provides a complete find-and-replace operation.
|
|
*
|
|
* This method scans the input string looking for a match of the pattern.
|
|
* All input that is not part of the match is copied unchanged to the
|
|
* destination buffer. The matched region is replaced in the output
|
|
* buffer by the replacement string. The replacement string may contain
|
|
* references to capture groups; these take the form of $1, $2, etc.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param replacement A string containing the replacement text.
|
|
* @param dest A mutable UText that will receive the result.
|
|
* If NULL, a new UText will be created (which may not be mutable).
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return A UText containing the results of the find and replace.
|
|
* If a pre-allocated UText was provided, it will always be used and returned.
|
|
*
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE UText * U_EXPORT2
|
|
uregex_replaceFirstUText(URegularExpression *regexp,
|
|
UText *replacement,
|
|
UText *dest,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Implements a replace operation intended to be used as part of an
|
|
* incremental find-and-replace.
|
|
*
|
|
* <p>The input string, starting from the end of the previous match and ending at
|
|
* the start of the current match, is appended to the destination string. Then the
|
|
* replacement string is appended to the output string,
|
|
* including handling any substitutions of captured text.</p>
|
|
*
|
|
* <p>A note on preflight computation of buffersize and error handling:
|
|
* Calls to uregex_appendReplacement() and uregex_appendTail() are
|
|
* designed to be chained, one after another, with the destination
|
|
* buffer pointer and buffer capacity updated after each in preparation
|
|
* to for the next. If the destination buffer is exhausted partway through such a
|
|
* sequence, a U_BUFFER_OVERFLOW_ERROR status will be returned. Normal
|
|
* ICU conventions are for a function to perform no action if it is
|
|
* called with an error status, but for this one case, uregex_appendRepacement()
|
|
* will operate normally so that buffer size computations will complete
|
|
* correctly.
|
|
*
|
|
* <p>For simple, prepackaged, non-incremental find-and-replace
|
|
* operations, see replaceFirst() or replaceAll().</p>
|
|
*
|
|
* @param regexp The regular expression object.
|
|
* @param replacementText The string that will replace the matched portion of the
|
|
* input string as it is copied to the destination buffer.
|
|
* The replacement text may contain references ($1, for
|
|
* example) to capture groups from the match.
|
|
* @param replacementLength The length of the replacement text string,
|
|
* or -1 if the string is NUL terminated.
|
|
* @param destBuf The buffer into which the results of the
|
|
* find-and-replace are placed. On return, this pointer
|
|
* will be updated to refer to the beginning of the
|
|
* unused portion of buffer, leaving it in position for
|
|
* a subsequent call to this function.
|
|
* @param destCapacity The size of the output buffer, On return, this
|
|
* parameter will be updated to reflect the space remaining
|
|
* unused in the output buffer.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return The length of the result string. In the event that
|
|
* destCapacity is inadequate, the full length of the
|
|
* untruncated output string is returned.
|
|
*
|
|
* @stable ICU 3.0
|
|
*
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_appendReplacement(URegularExpression *regexp,
|
|
const UChar *replacementText,
|
|
int32_t replacementLength,
|
|
UChar **destBuf,
|
|
int32_t *destCapacity,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Implements a replace operation intended to be used as part of an
|
|
* incremental find-and-replace.
|
|
*
|
|
* <p>The input string, starting from the end of the previous match and ending at
|
|
* the start of the current match, is appended to the destination string. Then the
|
|
* replacement string is appended to the output string,
|
|
* including handling any substitutions of captured text.</p>
|
|
*
|
|
* <p>For simple, prepackaged, non-incremental find-and-replace
|
|
* operations, see replaceFirst() or replaceAll().</p>
|
|
*
|
|
* @param regexp The regular expression object.
|
|
* @param replacementText The string that will replace the matched portion of the
|
|
* input string as it is copied to the destination buffer.
|
|
* The replacement text may contain references ($1, for
|
|
* example) to capture groups from the match.
|
|
* @param dest A mutable UText that will receive the result. Must not be NULL.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
*
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_appendReplacementUText(URegularExpression *regexp,
|
|
UText *replacementText,
|
|
UText *dest,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* As the final step in a find-and-replace operation, append the remainder
|
|
* of the input string, starting at the position following the last match,
|
|
* to the destination string. <code>uregex_appendTail()</code> is intended
|
|
* to be invoked after one or more invocations of the
|
|
* <code>uregex_appendReplacement()</code> function.
|
|
*
|
|
* @param regexp The regular expression object. This is needed to
|
|
* obtain the input string and with the position
|
|
* of the last match within it.
|
|
* @param destBuf The buffer in which the results of the
|
|
* find-and-replace are placed. On return, the pointer
|
|
* will be updated to refer to the beginning of the
|
|
* unused portion of buffer.
|
|
* @param destCapacity The size of the output buffer, On return, this
|
|
* value will be updated to reflect the space remaining
|
|
* unused in the output buffer.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return The length of the result string. In the event that
|
|
* destCapacity is inadequate, the full length of the
|
|
* untruncated output string is returned.
|
|
*
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_appendTail(URegularExpression *regexp,
|
|
UChar **destBuf,
|
|
int32_t *destCapacity,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* As the final step in a find-and-replace operation, append the remainder
|
|
* of the input string, starting at the position following the last match,
|
|
* to the destination string. <code>uregex_appendTailUText()</code> is intended
|
|
* to be invoked after one or more invocations of the
|
|
* <code>uregex_appendReplacementUText()</code> function.
|
|
*
|
|
* @param regexp The regular expression object. This is needed to
|
|
* obtain the input string and with the position
|
|
* of the last match within it.
|
|
* @param dest A mutable UText that will receive the result. Must not be NULL.
|
|
*
|
|
* @param status Error code
|
|
*
|
|
* @return The destination UText.
|
|
*
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE UText * U_EXPORT2
|
|
uregex_appendTailUText(URegularExpression *regexp,
|
|
UText *dest,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Split a string into fields. Somewhat like split() from Perl.
|
|
* The pattern matches identify delimiters that separate the input
|
|
* into fields. The input data between the matches becomes the
|
|
* fields themselves.
|
|
*
|
|
* Each of the fields is copied from the input string to the destination
|
|
* buffer, and NUL terminated. The position of each field within
|
|
* the destination buffer is returned in the destFields array.
|
|
*
|
|
* If the delimiter pattern includes capture groups, the captured text will
|
|
* also appear in the destination array of output strings, interspersed
|
|
* with the fields. This is similar to Perl, but differs from Java,
|
|
* which ignores the presence of capture groups in the pattern.
|
|
*
|
|
* Trailing empty fields will always be returned, assuming sufficient
|
|
* destination capacity. This differs from the default behavior for Java
|
|
* and Perl where trailing empty fields are not returned.
|
|
*
|
|
* The number of strings produced by the split operation is returned.
|
|
* This count includes the strings from capture groups in the delimiter pattern.
|
|
* This behavior differs from Java, which ignores capture groups.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param destBuf A (UChar *) buffer to receive the fields that
|
|
* are extracted from the input string. These
|
|
* field pointers will refer to positions within the
|
|
* destination buffer supplied by the caller. Any
|
|
* extra positions within the destFields array will be
|
|
* set to NULL.
|
|
* @param destCapacity The capacity of the destBuf.
|
|
* @param requiredCapacity The actual capacity required of the destBuf.
|
|
* If destCapacity is too small, requiredCapacity will return
|
|
* the total capacity required to hold all of the output, and
|
|
* a U_BUFFER_OVERFLOW_ERROR will be returned.
|
|
* @param destFields An array to be filled with the position of each
|
|
* of the extracted fields within destBuf.
|
|
* @param destFieldsCapacity The number of elements in the destFields array.
|
|
* If the number of fields found is less than destFieldsCapacity,
|
|
* the extra destFields elements are set to zero.
|
|
* If destFieldsCapacity is too small, the trailing part of the
|
|
* input, including any field delimiters, is treated as if it
|
|
* were the last field - it is copied to the destBuf, and
|
|
* its position is in the destBuf is stored in the last element
|
|
* of destFields. This behavior mimics that of Perl. It is not
|
|
* an error condition, and no error status is returned when all destField
|
|
* positions are used.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return The number of fields into which the input string was split.
|
|
* @stable ICU 3.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_split( URegularExpression *regexp,
|
|
UChar *destBuf,
|
|
int32_t destCapacity,
|
|
int32_t *requiredCapacity,
|
|
UChar *destFields[],
|
|
int32_t destFieldsCapacity,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Split a string into fields. Somewhat like split() from Perl.
|
|
* The pattern matches identify delimiters that separate the input
|
|
* into fields. The input data between the matches becomes the
|
|
* fields themselves.
|
|
* <p>
|
|
* The behavior of this function is not very closely aligned with uregex_split();
|
|
* instead, it is based on (and implemented directly on top of) the C++ split method.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param destFields An array of mutable UText structs to receive the results of the split.
|
|
* If a field is NULL, a new UText is allocated to contain the results for
|
|
* that field. This new UText is not guaranteed to be mutable.
|
|
* @param destFieldsCapacity The number of elements in the destination array.
|
|
* If the number of fields found is less than destCapacity, the
|
|
* extra strings in the destination array are not altered.
|
|
* If the number of destination strings is less than the number
|
|
* of fields, the trailing part of the input string, including any
|
|
* field delimiters, is placed in the last destination string.
|
|
* This behavior mimics that of Perl. It is not an error condition, and no
|
|
* error status is returned when all destField positions are used.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return The number of fields into which the input string was split.
|
|
*
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_splitUText(URegularExpression *regexp,
|
|
UText *destFields[],
|
|
int32_t destFieldsCapacity,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Set a processing time limit for match operations with this URegularExpression.
|
|
*
|
|
* Some patterns, when matching certain strings, can run in exponential time.
|
|
* For practical purposes, the match operation may appear to be in an
|
|
* infinite loop.
|
|
* When a limit is set a match operation will fail with an error if the
|
|
* limit is exceeded.
|
|
* <p>
|
|
* The units of the limit are steps of the match engine.
|
|
* Correspondence with actual processor time will depend on the speed
|
|
* of the processor and the details of the specific pattern, but will
|
|
* typically be on the order of milliseconds.
|
|
* <p>
|
|
* By default, the matching time is not limited.
|
|
* <p>
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param limit The limit value, or 0 for no limit.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setTimeLimit(URegularExpression *regexp,
|
|
int32_t limit,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Get the time limit for for matches with this URegularExpression.
|
|
* A return value of zero indicates that there is no limit.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @return the maximum allowed time for a match, in units of processing steps.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_getTimeLimit(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Set the amount of heap storage available for use by the match backtracking stack.
|
|
* <p>
|
|
* ICU uses a backtracking regular expression engine, with the backtrack stack
|
|
* maintained on the heap. This function sets the limit to the amount of memory
|
|
* that can be used for this purpose. A backtracking stack overflow will
|
|
* result in an error from the match operation that caused it.
|
|
* <p>
|
|
* A limit is desirable because a malicious or poorly designed pattern can use
|
|
* excessive memory, potentially crashing the process. A limit is enabled
|
|
* by default.
|
|
* <p>
|
|
* @param regexp The compiled regular expression.
|
|
* @param limit The maximum size, in bytes, of the matching backtrack stack.
|
|
* A value of zero means no limit.
|
|
* The limit must be greater than or equal to zero.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
*
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setStackLimit(URegularExpression *regexp,
|
|
int32_t limit,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Get the size of the heap storage available for use by the back tracking stack.
|
|
*
|
|
* @return the maximum backtracking stack size, in bytes, or zero if the
|
|
* stack size is unlimited.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
uregex_getStackLimit(const URegularExpression *regexp,
|
|
UErrorCode *status);
|
|
|
|
|
|
/**
|
|
* Function pointer for a regular expression matching callback function.
|
|
* When set, a callback function will be called periodically during matching
|
|
* operations. If the call back function returns FALSE, the matching
|
|
* operation will be terminated early.
|
|
*
|
|
* Note: the callback function must not call other functions on this
|
|
* URegularExpression.
|
|
*
|
|
* @param context context pointer. The callback function will be invoked
|
|
* with the context specified at the time that
|
|
* uregex_setMatchCallback() is called.
|
|
* @param steps the accumulated processing time, in match steps,
|
|
* for this matching operation.
|
|
* @return TRUE to continue the matching operation.
|
|
* FALSE to terminate the matching operation.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_CDECL_BEGIN
|
|
typedef UBool U_CALLCONV URegexMatchCallback (
|
|
const void *context,
|
|
int32_t steps);
|
|
U_CDECL_END
|
|
|
|
/**
|
|
* Set a callback function for this URegularExpression.
|
|
* During matching operations the function will be called periodically,
|
|
* giving the application the opportunity to terminate a long-running
|
|
* match.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param callback A pointer to the user-supplied callback function.
|
|
* @param context User context pointer. The value supplied at the
|
|
* time the callback function is set will be saved
|
|
* and passed to the callback each time that it is called.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setMatchCallback(URegularExpression *regexp,
|
|
URegexMatchCallback *callback,
|
|
const void *context,
|
|
UErrorCode *status);
|
|
|
|
|
|
/**
|
|
* Get the callback function for this URegularExpression.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param callback Out parameter, receives a pointer to the user-supplied
|
|
* callback function.
|
|
* @param context Out parameter, receives the user context pointer that
|
|
* was set when uregex_setMatchCallback() was called.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.0
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_getMatchCallback(const URegularExpression *regexp,
|
|
URegexMatchCallback **callback,
|
|
const void **context,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Function pointer for a regular expression find callback function.
|
|
*
|
|
* When set, a callback function will be called during a find operation
|
|
* and for operations that depend on find, such as findNext, split and some replace
|
|
* operations like replaceFirst.
|
|
* The callback will usually be called after each attempt at a match, but this is not a
|
|
* guarantee that the callback will be invoked at each character. For finds where the
|
|
* match engine is invoked at each character, this may be close to true, but less likely
|
|
* for more optimized loops where the pattern is known to only start, and the match
|
|
* engine invoked, at certain characters.
|
|
* When invoked, this callback will specify the index at which a match operation is about
|
|
* to be attempted, giving the application the opportunity to terminate a long-running
|
|
* find operation.
|
|
*
|
|
* If the call back function returns FALSE, the find operation will be terminated early.
|
|
*
|
|
* Note: the callback function must not call other functions on this
|
|
* URegularExpression
|
|
*
|
|
* @param context context pointer. The callback function will be invoked
|
|
* with the context specified at the time that
|
|
* uregex_setFindProgressCallback() is called.
|
|
* @param matchIndex the next index at which a match attempt will be attempted for this
|
|
* find operation. If this callback interrupts the search, this is the
|
|
* index at which a find/findNext operation may be re-initiated.
|
|
* @return TRUE to continue the matching operation.
|
|
* FALSE to terminate the matching operation.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_CDECL_BEGIN
|
|
typedef UBool U_CALLCONV URegexFindProgressCallback (
|
|
const void *context,
|
|
int64_t matchIndex);
|
|
U_CDECL_END
|
|
|
|
|
|
/**
|
|
* Set the find progress callback function for this URegularExpression.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param callback A pointer to the user-supplied callback function.
|
|
* @param context User context pointer. The value supplied at the
|
|
* time the callback function is set will be saved
|
|
* and passed to the callback each time that it is called.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_setFindProgressCallback(URegularExpression *regexp,
|
|
URegexFindProgressCallback *callback,
|
|
const void *context,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Get the find progress callback function for this URegularExpression.
|
|
*
|
|
* @param regexp The compiled regular expression.
|
|
* @param callback Out parameter, receives a pointer to the user-supplied
|
|
* callback function.
|
|
* @param context Out parameter, receives the user context pointer that
|
|
* was set when uregex_setFindProgressCallback() was called.
|
|
* @param status A reference to a UErrorCode to receive any errors.
|
|
* @stable ICU 4.6
|
|
*/
|
|
U_STABLE void U_EXPORT2
|
|
uregex_getFindProgressCallback(const URegularExpression *regexp,
|
|
URegexFindProgressCallback **callback,
|
|
const void **context,
|
|
UErrorCode *status);
|
|
|
|
#endif /* !UCONFIG_NO_REGULAR_EXPRESSIONS */
|
|
#endif /* UREGEX_H */
|