/******************************************************************** * 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
*/ typedefvoid* 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
*/ typedefstruct 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
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