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Diffstat (limited to 'intl/icu/source/common/unicode/urep.h')
| -rw-r--r-- | intl/icu/source/common/unicode/urep.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/intl/icu/source/common/unicode/urep.h b/intl/icu/source/common/unicode/urep.h new file mode 100644 index 0000000000..932202ddb0 --- /dev/null +++ b/intl/icu/source/common/unicode/urep.h @@ -0,0 +1,157 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +****************************************************************************** +* Copyright (C) 1997-2010, International Business Machines +* Corporation and others. All Rights Reserved. +****************************************************************************** +* Date Name Description +* 06/23/00 aliu Creation. +****************************************************************************** +*/ + +#ifndef __UREP_H +#define __UREP_H + +#include "unicode/utypes.h" + +U_CDECL_BEGIN + +/******************************************************************** + * General Notes + ******************************************************************** + * TODO + * Add usage scenario + * Add test code + * Talk about pinning + * Talk about "can truncate result if out of memory" + */ + +/******************************************************************** + * Data Structures + ********************************************************************/ +/** + * \file + * \brief C API: Callbacks for UReplaceable + */ +/** + * An opaque replaceable text object. This will be manipulated only + * through the caller-supplied UReplaceableFunctor struct. Related + * to the C++ class Replaceable. + * This is currently only used in the Transliterator C API, see utrans.h . + * @stable ICU 2.0 + */ +typedef void* UReplaceable; + +/** + * A set of function pointers that transliterators use to manipulate a + * UReplaceable. The caller should supply the required functions to + * manipulate their text appropriately. Related to the C++ class + * Replaceable. + * @stable ICU 2.0 + */ +typedef struct UReplaceableCallbacks { + + /** + * Function pointer that returns the number of UChar code units in + * this text. + * + * @param rep A pointer to "this" UReplaceable object. + * @return The length of the text. + * @stable ICU 2.0 + */ + int32_t (*length)(const UReplaceable* rep); + + /** + * Function pointer that returns a UChar code units at the given + * offset into this text; 0 <= offset < n, where n is the value + * returned by (*length)(rep). See unistr.h for a description of + * charAt() vs. char32At(). + * + * @param rep A pointer to "this" UReplaceable object. + * @param offset The index at which to fetch the UChar (code unit). + * @return The UChar (code unit) at offset, or U+FFFF if the offset is out of bounds. + * @stable ICU 2.0 + */ + UChar (*charAt)(const UReplaceable* rep, + int32_t offset); + + /** + * Function pointer that returns a UChar32 code point at the given + * offset into this text. See unistr.h for a description of + * charAt() vs. char32At(). + * + * @param rep A pointer to "this" UReplaceable object. + * @param offset The index at which to fetch the UChar32 (code point). + * @return The UChar32 (code point) at offset, or U+FFFF if the offset is out of bounds. + * @stable ICU 2.0 + */ + UChar32 (*char32At)(const UReplaceable* rep, + int32_t offset); + + /** + * Function pointer that replaces text between start and limit in + * this text with the given text. Attributes (out of band info) + * should be retained. + * + * @param rep A pointer to "this" UReplaceable object. + * @param start the starting index of the text to be replaced, + * inclusive. + * @param limit the ending index of the text to be replaced, + * exclusive. + * @param text the new text to replace the UChars from + * start..limit-1. + * @param textLength the number of UChars at text, or -1 if text + * is null-terminated. + * @stable ICU 2.0 + */ + void (*replace)(UReplaceable* rep, + int32_t start, + int32_t limit, + const UChar* text, + int32_t textLength); + + /** + * Function pointer that copies the characters in the range + * [<tt>start</tt>, <tt>limit</tt>) into the array <tt>dst</tt>. + * + * @param rep A pointer to "this" UReplaceable object. + * @param start offset of first character which will be copied + * into the array + * @param limit offset immediately following the last character to + * be copied + * @param dst array in which to copy characters. The length of + * <tt>dst</tt> must be at least <tt>(limit - start)</tt>. + * @stable ICU 2.1 + */ + void (*extract)(UReplaceable* rep, + int32_t start, + int32_t limit, + UChar* dst); + + /** + * Function pointer that copies text between start and limit in + * this text to another index in the text. Attributes (out of + * band info) should be retained. After this call, there will be + * (at least) two copies of the characters originally located at + * start..limit-1. + * + * @param rep A pointer to "this" UReplaceable object. + * @param start the starting index of the text to be copied, + * inclusive. + * @param limit the ending index of the text to be copied, + * exclusive. + * @param dest the index at which the copy of the UChars should be + * inserted. + * @stable ICU 2.0 + */ + void (*copy)(UReplaceable* rep, + int32_t start, + int32_t limit, + int32_t dest); + +} UReplaceableCallbacks; + +U_CDECL_END + +#endif |