intl/icu/source/tools/genrb/rle.h@6474c204b198 (annotated)
intl/icu/source/tools/genrb/rle.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | ******************************************************************************* |
| michael@0 | 3 | * |
| michael@0 | 4 | * Copyright (C) 2000, International Business Machines |
| michael@0 | 5 | * Corporation and others. All Rights Reserved. |
| michael@0 | 6 | * |
| michael@0 | 7 | ******************************************************************************* |
| michael@0 | 8 | * |
| michael@0 | 9 | * File writejava.c |
| michael@0 | 10 | * |
| michael@0 | 11 | * Modification History: |
| michael@0 | 12 | * |
| michael@0 | 13 | * Date Name Description |
| michael@0 | 14 | * 01/11/02 Ram Creation. |
| michael@0 | 15 | ******************************************************************************* |
| michael@0 | 16 | */ |
| michael@0 | 17 | |
| michael@0 | 18 | #ifndef RLE_H |
| michael@0 | 19 | #define RLE_H 1 |
| michael@0 | 20 | |
| michael@0 | 21 | #include "unicode/utypes.h" |
| michael@0 | 22 | #include "unicode/ustring.h" |
| michael@0 | 23 | |
| michael@0 | 24 | U_CDECL_BEGIN |
| michael@0 | 25 | /** |
| michael@0 | 26 | * Construct a string representing a byte array. Use run-length encoding. |
| michael@0 | 27 | * Two bytes are packed into a single char, with a single extra zero byte at |
| michael@0 | 28 | * the end if needed. A byte represents itself, unless it is the |
| michael@0 | 29 | * ESCAPE_BYTE. Then the following notations are possible: |
| michael@0 | 30 | * ESCAPE_BYTE ESCAPE_BYTE ESCAPE_BYTE literal |
| michael@0 | 31 | * ESCAPE_BYTE n b n instances of byte b |
| michael@0 | 32 | * Since an encoded run occupies 3 bytes, we only encode runs of 4 or |
| michael@0 | 33 | * more bytes. Thus we have n > 0 and n != ESCAPE_BYTE and n <= 0xFF. |
| michael@0 | 34 | * If we encounter a run where n == ESCAPE_BYTE, we represent this as: |
| michael@0 | 35 | * b ESCAPE_BYTE n-1 b |
| michael@0 | 36 | * The ESCAPE_BYTE value is chosen so as not to collide with commonly |
| michael@0 | 37 | * seen values. |
| michael@0 | 38 | */ |
| michael@0 | 39 | int32_t |
| michael@0 | 40 | byteArrayToRLEString(const uint8_t* src,int32_t srcLen, uint16_t* buffer,int32_t bufLen, UErrorCode* status); |
| michael@0 | 41 | |
| michael@0 | 42 | |
| michael@0 | 43 | /** |
| michael@0 | 44 | * Construct a string representing a char array. Use run-length encoding. |
| michael@0 | 45 | * A character represents itself, unless it is the ESCAPE character. Then |
| michael@0 | 46 | * the following notations are possible: |
| michael@0 | 47 | * ESCAPE ESCAPE ESCAPE literal |
| michael@0 | 48 | * ESCAPE n c n instances of character c |
| michael@0 | 49 | * Since an encoded run occupies 3 characters, we only encode runs of 4 or |
| michael@0 | 50 | * more characters. Thus we have n > 0 and n != ESCAPE and n <= 0xFFFF. |
| michael@0 | 51 | * If we encounter a run where n == ESCAPE, we represent this as: |
| michael@0 | 52 | * c ESCAPE n-1 c |
| michael@0 | 53 | * The ESCAPE value is chosen so as not to collide with commonly |
| michael@0 | 54 | * seen values. |
| michael@0 | 55 | */ |
| michael@0 | 56 | int32_t |
| michael@0 | 57 | usArrayToRLEString(const uint16_t* src,int32_t srcLen,uint16_t* buffer, int32_t bufLen,UErrorCode* status); |
| michael@0 | 58 | |
| michael@0 | 59 | /** |
| michael@0 | 60 | * Construct an array of bytes from a run-length encoded string. |
| michael@0 | 61 | */ |
| michael@0 | 62 | int32_t |
| michael@0 | 63 | rleStringToByteArray(uint16_t* src, int32_t srcLen, uint8_t* target, int32_t tgtLen, UErrorCode* status); |
| michael@0 | 64 | /** |
| michael@0 | 65 | * Construct an array of shorts from a run-length encoded string. |
| michael@0 | 66 | */ |
| michael@0 | 67 | int32_t |
| michael@0 | 68 | rleStringToUCharArray(uint16_t* src, int32_t srcLen, uint16_t* target, int32_t tgtLen, UErrorCode* status); |
| michael@0 | 69 | |
| michael@0 | 70 | U_CDECL_END |
| michael@0 | 71 | |
| michael@0 | 72 | #endif |
