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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /intl/icu/source/tools/genrb/rle.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'intl/icu/source/tools/genrb/rle.h')
-rw-r--r-- | intl/icu/source/tools/genrb/rle.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/intl/icu/source/tools/genrb/rle.h b/intl/icu/source/tools/genrb/rle.h new file mode 100644 index 0000000000..2684bbe6b2 --- /dev/null +++ b/intl/icu/source/tools/genrb/rle.h @@ -0,0 +1,74 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* +* 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 |