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With permission from the main authors [1], most of the code has been relicensed under the MIT license. SPDX license identifiers are used so that the license headers in source code files aren't too large. Add CONTRIBUTORS.rst file. [1] https://github.com/rednex/rgbds/issues/128 Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
/*
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* Copyright (c) 2008-2009, Björn Höhrmann <bjoern@hoehrmann.de>
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*
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* SPDX-License-Identifier: MIT
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*/
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/*
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* UTF-8 decoder: http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
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*/
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#include <stdint.h>
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static const uint8_t utf8d[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 00..0f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10..1f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 20..2f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 30..3f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 40..4f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 50..5f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60..6f */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 70..7f */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 80..8f */
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, /* 90..9f */
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, /* a0..af */
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, /* b0..bf */
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8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* c0..cf */
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* d0..df */
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0xa, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, /* e0..e7 */
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0x3, 0x3, 0x3, 0x3, 0x3, 0x4, 0x3, 0x3, /* e8..ef */
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0xb, 0x6, 0x6, 0x6, 0x5, 0x8, 0x8, 0x8, /* f0..f7 */
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0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, /* f8..ff */
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0x0, 0x1, 0x2, 0x3, 0x5, 0x8, 0x7, 0x1, /* s0.. */
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0x1, 0x1, 0x4, 0x6, 0x1, 0x1, 0x1, 0x1, /* ..s0 */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* s1 */
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1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, /* s1 */
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1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, /* s3 */
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1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, /* s4 */
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1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, /* s5 */
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1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, /* s6 */
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1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, /* s7 */
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1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* s8 */
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};
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uint32_t decode(uint32_t *state, uint32_t *codep, uint32_t byte)
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{
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uint32_t type = utf8d[byte];
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*codep = (*state != 0) ?
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(byte & 0x3fu) | (*codep << 6) :
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(0xff >> type) & (byte);
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*state = utf8d[256 + *state * 16 + type];
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return *state;
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}
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