/*
**********************************************************************
-* Copyright (C) 2004, International Business Machines
+* Copyright (C) 2004-2015, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
-* file name: regex.h
+* file name: uregex.h
* encoding: US-ASCII
* indentation:4
*
#ifndef UREGEX_H
#define UREGEX_H
+#include "unicode/utext.h"
#include "unicode/utypes.h"
#if !UCONFIG_NO_REGULAR_EXPRESSIONS
+#include "unicode/localpointer.h"
#include "unicode/parseerr.h"
-#ifndef U_HIDE_DRAFT_API
-
struct URegularExpression;
/**
- * Structure represeting a compiled regular rexpression, plus the results
+ * Structure representing a compiled regular expression, plus the results
* of a match operation.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
typedef struct URegularExpression URegularExpression;
-#endif /* U_HIDE_DRAFT_API */
-
/**
* Constants for Regular Expression Match Modes.
* @stable ICU 2.4
*/
typedef enum URegexpFlag{
- /** Forces normalization of pattern and strings. @draft ICU 2.4 */
- UREGEX_CANON_EQ = 128,
+#ifndef U_HIDE_DRAFT_API
+ /** Forces normalization of pattern and strings.
+ Not implemented yet, just a placeholder, hence draft.
+ @draft ICU 2.4 */
+ UREGEX_CANON_EQ = 128,
+#endif /* U_HIDE_DRAFT_API */
/** Enable case insensitive matching. @stable ICU 2.4 */
UREGEX_CASE_INSENSITIVE = 2,
/** If set, '.' matches line terminators, otherwise '.' matching stops at line end.
* @stable ICU 2.4 */
UREGEX_DOTALL = 32,
+
+ /** If set, treat the entire pattern as a literal string.
+ * Metacharacters or escape sequences in the input sequence will be given
+ * no special meaning.
+ *
+ * The flag UREGEX_CASE_INSENSITIVE retains its impact
+ * on matching when used in conjunction with this flag.
+ * The other flags become superfluous.
+ *
+ * @stable ICU 4.0
+ */
+ UREGEX_LITERAL = 16,
/** Control behavior of "$" and "^"
* If set, recognize line terminators within string,
* otherwise, match only at start and end of input string.
* @stable ICU 2.4 */
UREGEX_MULTILINE = 8,
+
+ /** Unix-only line endings.
+ * When this mode is enabled, only \\u000a is recognized as a line ending
+ * in the behavior of ., ^, and $.
+ * @stable ICU 4.0
+ */
+ UREGEX_UNIX_LINES = 1,
/** Unicode word boundaries.
* If set, \b uses the Unicode TR 29 definition of word boundaries.
* Warning: Unicode word boundaries are quite different from
* traditional regular expression word boundaries. See
* http://unicode.org/reports/tr29/#Word_Boundaries
- * @draft ICU 2.8
+ * @stable ICU 2.8
*/
- UREGEX_UWORD = 256
+ UREGEX_UWORD = 256,
+
+ /** Error on Unrecognized backslash escapes.
+ * If set, fail with an error on patterns that contain
+ * backslash-escaped ASCII letters without a known special
+ * meaning. If this flag is not set, these
+ * escaped letters represent themselves.
+ * @stable ICU 4.0
+ */
+ UREGEX_ERROR_ON_UNKNOWN_ESCAPES = 512
+
} URegexpFlag;
/**
* string form into an internal representation using the specified match mode flags.
* The resulting regular expression handle can then be used to perform various
* matching operations.
+ *
*
* @param pattern The Regular Expression pattern to be compiled.
* @param patternLength The length of the pattern, or -1 if the pattern is
- * NUL termintated.
+ * NUL terminated.
* @param flags Flags that alter the default matching behavior for
* the regular expression, UREGEX_CASE_INSENSITIVE, for
* example. For default behavior, set this parameter to zero.
* See <code>enum URegexpFlag</code>. All desired flags
* are bitwise-ORed together.
- * @param pe Receives the position (line and column nubers) of any syntax
+ * @param pe Receives the position (line and column numbers) of any syntax
* error within the source regular expression string. If this
* information is not wanted, pass NULL for this parameter.
* @param status Receives error detected by this function.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*
*/
-U_DRAFT URegularExpression * U_EXPORT2
+U_STABLE URegularExpression * U_EXPORT2
uregex_open( const UChar *pattern,
int32_t patternLength,
uint32_t flags,
UParseError *pe,
UErrorCode *status);
+/**
+ * Open (compile) an ICU regular expression. Compiles the regular expression in
+ * string form into an internal representation using the specified match mode flags.
+ * The resulting regular expression handle can then be used to perform various
+ * matching operations.
+ * <p>
+ * The contents of the pattern UText will be extracted and saved. Ownership of the
+ * UText struct itself remains with the caller. This is to match the behavior of
+ * uregex_open().
+ *
+ * @param pattern The Regular Expression pattern to be compiled.
+ * @param flags Flags that alter the default matching behavior for
+ * the regular expression, UREGEX_CASE_INSENSITIVE, for
+ * example. For default behavior, set this parameter to zero.
+ * See <code>enum URegexpFlag</code>. All desired flags
+ * are bitwise-ORed together.
+ * @param pe Receives the position (line and column numbers) of any syntax
+ * error within the source regular expression string. If this
+ * information is not wanted, pass NULL for this parameter.
+ * @param status Receives error detected by this function.
+ *
+ * @stable ICU 4.6
+ */
+U_STABLE URegularExpression * U_EXPORT2
+uregex_openUText(UText *pattern,
+ uint32_t flags,
+ UParseError *pe,
+ UErrorCode *status);
+
/**
* Open (compile) an ICU regular expression. The resulting regular expression
* handle can then be used to perform various matching operations.
* is supplied as an 8 bit char * string in the default code page.
*
* @param pattern The Regular Expression pattern to be compiled,
- * NUL termintated.
+ * NUL terminated.
* @param flags Flags that alter the default matching behavior for
* the regular expression, UREGEX_CASE_INSENSITIVE, for
* example. For default behavior, set this parameter to zero.
* See <code>enum URegexpFlag</code>. All desired flags
* are bitwise-ORed together.
- * @param pe Receives the position (line and column nubers) of any syntax
+ * @param pe Receives the position (line and column numbers) of any syntax
* error within the source regular expression string. If this
* information is not wanted, pass NULL for this parameter.
* @param status Receives errors detected by this function.
* @return The URegularExpression object representing the compiled
* pattern.
*
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT URegularExpression * U_EXPORT2
+#if !UCONFIG_NO_CONVERSION
+U_STABLE URegularExpression * U_EXPORT2
uregex_openC( const char *pattern,
uint32_t flags,
UParseError *pe,
UErrorCode *status);
-
+#endif
* was holding.
*
* @param regexp The regular expression to be closed.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT void U_EXPORT2
+U_STABLE void U_EXPORT2
uregex_close(URegularExpression *regexp);
+#if U_SHOW_CPLUSPLUS_API
+
+U_NAMESPACE_BEGIN
+
+/**
+ * \class LocalURegularExpressionPointer
+ * "Smart pointer" class, closes a URegularExpression via uregex_close().
+ * For most methods see the LocalPointerBase base class.
+ *
+ * @see LocalPointerBase
+ * @see LocalPointer
+ * @stable ICU 4.4
+ */
+U_DEFINE_LOCAL_OPEN_POINTER(LocalURegularExpressionPointer, URegularExpression, uregex_close);
+
+U_NAMESPACE_END
+
+#endif
+
/**
* Make a copy of a compiled regular expression. Cloning a regular
* expression is faster than opening a second instance from the source
* form of the expression, and requires less memory.
* <p>
* Note that the current input string and the position of any matched text
- * within it are not cloned; only the pattern itself and and the
+ * within it are not cloned; only the pattern itself and the
* match mode flags are copied.
* <p>
* Cloning can be particularly useful to threaded applications that perform
* @param regexp The compiled regular expression to be cloned.
* @param status Receives indication of any errors encountered
* @return the cloned copy of the compiled regular expression.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT URegularExpression * U_EXPORT2
+U_STABLE URegularExpression * U_EXPORT2
uregex_clone(const URegularExpression *regexp, UErrorCode *status);
/**
- * Return a pointer to the source form of the pattern for this regular expression.
+ * Returns a pointer to the source form of the pattern for this regular expression.
+ * This function will work even if the pattern was originally specified as a UText.
*
* @param regexp The compiled regular expression.
* @param patLength This output parameter will be set to the length of the
* owned by the regular expression object, and must not be
* altered or deleted by the application. The returned string
* will remain valid until the regular expression is closed.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT const UChar * U_EXPORT2
-uregex_pattern(const URegularExpression *regexp,
- int32_t *patLength,
- UErrorCode *status);
+U_STABLE const UChar * U_EXPORT2
+uregex_pattern(const URegularExpression *regexp,
+ int32_t *patLength,
+ UErrorCode *status);
+/**
+ * Returns the source text of the pattern for this regular expression.
+ * This function will work even if the pattern was originally specified as a UChar string.
+ *
+ * @param regexp The compiled regular expression.
+ * @param status Receives errors detected by this function.
+ * @return the pattern text. The storage for the text is owned by the regular expression
+ * object, and must not be altered or deleted.
+ *
+ * @stable ICU 4.6
+ */
+U_STABLE UText * U_EXPORT2
+uregex_patternUText(const URegularExpression *regexp,
+ UErrorCode *status);
/**
* Get the match mode flags that were specified when compiling this regular expression.
* @param regexp The compiled regular expression.
* @return The match mode flags
* @see URegexpFlag
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+U_STABLE int32_t U_EXPORT2
uregex_flags(const URegularExpression *regexp,
UErrorCode *status);
* @param textLength The length of the subject text, or -1 if the string
* is NUL terminated.
* @param status Receives errors detected by this function.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT void U_EXPORT2
+U_STABLE void U_EXPORT2
uregex_setText(URegularExpression *regexp,
const UChar *text,
int32_t textLength,
UErrorCode *status);
+
+/**
+ * Set the subject text string upon which the regular expression will look for matches.
+ * This function may be called any number of times, allowing the regular
+ * expression pattern to be applied to different strings.
+ * <p>
+ * Regular expression matching operations work directly on the application's
+ * string data; only a shallow clone is made. The subject string data must not be
+ * altered after calling this function until after all regular expression
+ * operations involving this string data are completed.
+ *
+ * @param regexp The compiled regular expression.
+ * @param text The subject text string.
+ * @param status Receives errors detected by this function.
+ *
+ * @stable ICU 4.6
+ */
+U_STABLE void U_EXPORT2
+uregex_setUText(URegularExpression *regexp,
+ UText *text,
+ UErrorCode *status);
+
/**
* Get the subject text that is currently associated with this
- * regular expression object. This simply returns whatever string
- * pointer was previously supplied via uregex_setText().
+ * regular expression object. If the input was supplied using uregex_setText(),
+ * that pointer will be returned. Otherwise, the characters in the input will
+ * be extracted to a buffer and returned. In either case, ownership remains
+ * with the regular expression object.
+ *
+ * This function will work even if the input was originally specified as a UText.
*
* @param regexp The compiled regular expression.
* @param textLength The length of the string is returned in this output parameter.
* the text is known in advance to be a NUL terminated
* string.
* @param status Receives errors detected by this function.
- * @return Poiner to the subject text string currently associated with
+ * @return Pointer to the subject text string currently associated with
* this regular expression.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT const UChar * U_EXPORT2
+U_STABLE const UChar * U_EXPORT2
uregex_getText(URegularExpression *regexp,
int32_t *textLength,
UErrorCode *status);
/**
- * Attempts to match the input string, beginning at startIndex, against the pattern.
- * To succeed, the match must extend to the end of the input string.
+ * Get the subject text that is currently associated with this
+ * regular expression object.
+ *
+ * This function will work even if the input was originally specified as a UChar string.
+ *
+ * @param regexp The compiled regular expression.
+ * @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 actual input string.
+ * @param status Receives errors detected by this function.
+ * @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_getUText(URegularExpression *regexp,
+ UText *dest,
+ UErrorCode *status);
+
+/**
+ * Set the subject text string upon which the regular expression is looking for matches
+ * without changing any other aspect of the matching state.
+ * The new and previous text strings must have the same content.
+ *
+ * This function is intended for use in environments where ICU is operating on
+ * strings that may move around in memory. It provides a mechanism for notifying
+ * ICU that the string has been relocated, and providing a new UText to access the
+ * string in its new position.
+ *
+ * Note that the regular expression implementation never copies the underlying text
+ * of a string being matched, but always operates directly on the original text
+ * provided by the user. Refreshing simply drops the references to the old text
+ * and replaces them with references to the new.
+ *
+ * Caution: this function is normally used only by very specialized
+ * system-level code. One example use case is with garbage collection
+ * that moves the text in memory.
+ *
+ * @param regexp The compiled regular expression.
+ * @param text The new (moved) text string.
+ * @param status Receives errors detected by this function.
+ *
+ * @stable ICU 4.8
+ */
+U_STABLE void U_EXPORT2
+uregex_refreshUText(URegularExpression *regexp,
+ UText *text,
+ UErrorCode *status);
+
+/**
+ * Attempts to match the input string against the pattern.
+ * To succeed, the match must extend to the end of the string,
+ * or cover the complete match region.
+ *
+ * If startIndex >= zero the match operation starts at the specified
+ * index and must extend to the end of the input string. Any region
+ * that has been specified is reset.
+ *
+ * If startIndex == -1 the match must cover the input region, or the entire
+ * input string if no region has been set. This directly corresponds to
+ * Matcher.matches() in Java
*
* @param regexp The compiled regular expression.
- * @param startIndex The input string index at which to begin matching.
+ * @param startIndex The input string (native) index at which to begin matching, or -1
+ * to match the input Region.
* @param status Receives errors detected by this function.
* @return TRUE if there is a match
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT UBool U_EXPORT2
+U_STABLE UBool U_EXPORT2
uregex_matches(URegularExpression *regexp,
int32_t startIndex,
UErrorCode *status);
+/**
+ * 64bit version of uregex_matches.
+ * Attempts to match the input string against the pattern.
+ * To succeed, the match must extend to the end of the string,
+ * or cover the complete match region.
+ *
+ * If startIndex >= zero the match operation starts at the specified
+ * index and must extend to the end of the input string. Any region
+ * that has been specified is reset.
+ *
+ * If startIndex == -1 the match must cover the input region, or the entire
+ * input string if no region has been set. This directly corresponds to
+ * Matcher.matches() in Java
+ *
+ * @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 Receives errors detected by this function.
+ * @return TRUE if there is a match
+ * @stable ICU 4.6
+ */
+U_STABLE UBool U_EXPORT2
+uregex_matches64(URegularExpression *regexp,
+ int64_t startIndex,
+ UErrorCode *status);
+
/**
* 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>uregexp_group()</code> functions.</p>
*
* @param regexp The compiled regular expression.
- * @param startIndex The input string index at which to begin matching.
+ * @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.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT UBool U_EXPORT2
+U_STABLE UBool U_EXPORT2
uregex_lookingAt(URegularExpression *regexp,
int32_t startIndex,
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>uregexp_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.
- * The search for a match begins at the specified index.
+ * 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 in the input string to begin the search
+ * @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.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT UBool U_EXPORT2
+U_STABLE UBool U_EXPORT2
uregex_find(URegularExpression *regexp,
int32_t startIndex,
UErrorCode *status);
/**
- * Find the next pattern match in the input string.
- * Begin searching the input at the location following the end of
- * the previous match, or at the start of the string if there is no previous match.
- * If a match is found, <code>uregex_start(), uregex_end()</code>, and
+ * 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
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT UBool U_EXPORT2
+U_STABLE UBool U_EXPORT2
uregex_findNext(URegularExpression *regexp,
UErrorCode *status);
* @param regexp The compiled regular expression.
* @param status A reference to a UErrorCode to receive any errors.
* @return the number of capture groups
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+U_STABLE int32_t U_EXPORT2
uregex_groupCount(URegularExpression *regexp,
UErrorCode *status);
+#ifndef U_HIDE_DRAFT_API
+/**
+ * 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.
+ *
+ * @draft ICU 55
+ */
+U_DRAFT 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.
+ *
+ * @draft ICU 55
+ */
+U_DRAFT int32_t U_EXPORT2
+uregex_groupNumberFromCName(URegularExpression *regexp,
+ const char *groupName,
+ int32_t nameLength,
+ UErrorCode *status);
+#endif /* U_HIDE_DRAFT_API */
+
/** 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 status A reference to a UErrorCode to receive any errors.
* @return Length of matching data,
* or -1 if no applicable match.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+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
* @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 position in the input of the text matched
+ * @return the starting (native) position in the input of the text matched
* by the specified group.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+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.
* @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 index of the position following the last matched character.
- * @draft ICU 3.0
+ * @return the (native) index of the position following the last matched character.
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+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.
+ * 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 in the text at which a
+ * @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.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT void U_EXPORT2
+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
* @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 desitnation buffer.
+ * @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.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+U_STABLE int32_t U_EXPORT2
uregex_replaceAll(URegularExpression *regexp,
- UChar *replacementText,
+ 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
* @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 desitnation buffer.
+ * @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.
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+U_STABLE int32_t U_EXPORT2
uregex_replaceFirst(URegularExpression *regexp,
- UChar *replacementText,
+ 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
* destCapacity is inadequate, the full length of the
* untruncated output string is returned.
*
- * @draft ICU 3.0
+ * @stable ICU 3.0
*
*/
-U_DRAFT int32_t U_EXPORT2
+U_STABLE int32_t U_EXPORT2
uregex_appendReplacement(URegularExpression *regexp,
- UChar *replacementText,
- int32_t replacementLength,
- UChar **destBuf,
- int32_t *destCapacity,
- UErrorCode *status);
+ 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
* destCapacity is inadequate, the full length of the
* untruncated output string is returned.
*
- * @draft ICU 3.0
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+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.
- * <p>
+ *
* Each of the fields is copied from the input string to the destination
- * buffer, and the NUL terminated. The position of each field within
+ * 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
* 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.
- * @draft ICU 3.0
- *
- * Note: another choice for the design of this function would be to not
- * copy the resulting fields at all, but to return indexes and
- * lengths within the source text.
- * Advantages would be
- * o Faster. No Copying.
- * o Nothing extra needed when field data may contain embedded NUL chars.
- * o Less memory needed if working on large data.
- * Disadvantages
- * o Less consistent with C++ split, which copies into an
- * array of UnicodeStrings.
- * o No NUL termination, extracted fields would be less convenient
- * to use in most cases.
- * o Possible problems in the future, when support Unicode Normalization
- * could cause the fields to not correspond exactly to
- * a range of the source text.
+ * @stable ICU 3.0
*/
-U_DRAFT int32_t U_EXPORT2
+U_STABLE int32_t U_EXPORT2
uregex_split( URegularExpression *regexp,
UChar *destBuf,
int32_t destCapacity,
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 */
projects / apple / icu.git / blobdiff