/* ******************************************************************************* * * Copyright (C) 2000, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * * File writejava.c * * Modification History: * * Date Name Description * 01/11/02 Ram Creation. ******************************************************************************* */ #ifndef RLE_H #define RLE_H 1 #include "unicode/utypes.h" #include "unicode/ustring.h" U_CDECL_BEGIN /** * Construct a string representing a byte array. Use run-length encoding. * Two bytes are packed into a single char, with a single extra zero byte at * the end if needed. A byte represents itself, unless it is the * ESCAPE_BYTE. Then the following notations are possible: * ESCAPE_BYTE ESCAPE_BYTE ESCAPE_BYTE literal * ESCAPE_BYTE n b n instances of byte b * Since an encoded run occupies 3 bytes, we only encode runs of 4 or * more bytes. Thus we have n > 0 and n != ESCAPE_BYTE and n <= 0xFF. * If we encounter a run where n == ESCAPE_BYTE, we represent this as: * b ESCAPE_BYTE n-1 b * The ESCAPE_BYTE value is chosen so as not to collide with commonly * seen values. */ int32_t byteArrayToRLEString(const uint8_t* src,int32_t srcLen, uint16_t* buffer,int32_t bufLen, UErrorCode* status); /** * Construct a string representing a char array. Use run-length encoding. * A character represents itself, unless it is the ESCAPE character. Then * the following notations are possible: * ESCAPE ESCAPE ESCAPE literal * ESCAPE n c n instances of character c * Since an encoded run occupies 3 characters, we only encode runs of 4 or * more characters. Thus we have n > 0 and n != ESCAPE and n <= 0xFFFF. * If we encounter a run where n == ESCAPE, we represent this as: * c ESCAPE n-1 c * The ESCAPE value is chosen so as not to collide with commonly * seen values. */ int32_t usArrayToRLEString(const uint16_t* src,int32_t srcLen,uint16_t* buffer, int32_t bufLen,UErrorCode* status); /** * Construct an array of bytes from a run-length encoded string. */ int32_t rleStringToByteArray(uint16_t* src, int32_t srcLen, uint8_t* target, int32_t tgtLen, UErrorCode* status); /** * Construct an array of shorts from a run-length encoded string. */ int32_t rleStringToUCharArray(uint16_t* src, int32_t srcLen, uint16_t* target, int32_t tgtLen, UErrorCode* status); U_CDECL_END #endif