1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/tools/genrb/rle.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,72 @@
1.4 +/*
1.5 +*******************************************************************************
1.6 +*
1.7 +* Copyright (C) 2000, International Business Machines
1.8 +* Corporation and others. All Rights Reserved.
1.9 +*
1.10 +*******************************************************************************
1.11 +*
1.12 +* File writejava.c
1.13 +*
1.14 +* Modification History:
1.15 +*
1.16 +* Date Name Description
1.17 +* 01/11/02 Ram Creation.
1.18 +*******************************************************************************
1.19 +*/
1.20 +
1.21 +#ifndef RLE_H
1.22 +#define RLE_H 1
1.23 +
1.24 +#include "unicode/utypes.h"
1.25 +#include "unicode/ustring.h"
1.26 +
1.27 +U_CDECL_BEGIN
1.28 +/**
1.29 + * Construct a string representing a byte array. Use run-length encoding.
1.30 + * Two bytes are packed into a single char, with a single extra zero byte at
1.31 + * the end if needed. A byte represents itself, unless it is the
1.32 + * ESCAPE_BYTE. Then the following notations are possible:
1.33 + * ESCAPE_BYTE ESCAPE_BYTE ESCAPE_BYTE literal
1.34 + * ESCAPE_BYTE n b n instances of byte b
1.35 + * Since an encoded run occupies 3 bytes, we only encode runs of 4 or
1.36 + * more bytes. Thus we have n > 0 and n != ESCAPE_BYTE and n <= 0xFF.
1.37 + * If we encounter a run where n == ESCAPE_BYTE, we represent this as:
1.38 + * b ESCAPE_BYTE n-1 b
1.39 + * The ESCAPE_BYTE value is chosen so as not to collide with commonly
1.40 + * seen values.
1.41 + */
1.42 +int32_t
1.43 +byteArrayToRLEString(const uint8_t* src,int32_t srcLen, uint16_t* buffer,int32_t bufLen, UErrorCode* status);
1.44 +
1.45 +
1.46 +/**
1.47 + * Construct a string representing a char array. Use run-length encoding.
1.48 + * A character represents itself, unless it is the ESCAPE character. Then
1.49 + * the following notations are possible:
1.50 + * ESCAPE ESCAPE ESCAPE literal
1.51 + * ESCAPE n c n instances of character c
1.52 + * Since an encoded run occupies 3 characters, we only encode runs of 4 or
1.53 + * more characters. Thus we have n > 0 and n != ESCAPE and n <= 0xFFFF.
1.54 + * If we encounter a run where n == ESCAPE, we represent this as:
1.55 + * c ESCAPE n-1 c
1.56 + * The ESCAPE value is chosen so as not to collide with commonly
1.57 + * seen values.
1.58 + */
1.59 +int32_t
1.60 +usArrayToRLEString(const uint16_t* src,int32_t srcLen,uint16_t* buffer, int32_t bufLen,UErrorCode* status);
1.61 +
1.62 +/**
1.63 + * Construct an array of bytes from a run-length encoded string.
1.64 + */
1.65 +int32_t
1.66 +rleStringToByteArray(uint16_t* src, int32_t srcLen, uint8_t* target, int32_t tgtLen, UErrorCode* status);
1.67 +/**
1.68 + * Construct an array of shorts from a run-length encoded string.
1.69 + */
1.70 +int32_t
1.71 +rleStringToUCharArray(uint16_t* src, int32_t srcLen, uint16_t* target, int32_t tgtLen, UErrorCode* status);
1.72 +
1.73 +U_CDECL_END
1.74 +
1.75 +#endif
