forked from mia/Aegisub
382 lines
14 KiB
C
382 lines
14 KiB
C
/*
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* Copyright (C) 1999-2001, 2005 Free Software Foundation, Inc.
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* This file is part of the GNU LIBICONV Library.
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*
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* The GNU LIBICONV Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* The GNU LIBICONV Library is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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* If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
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* Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* GB18030
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*/
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/*
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* GB18030, as specified in the GB18030 standard, is an extension of GBK.
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*
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* In what follows, page numbers refer to the GB18030 standard (second
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* printing).
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*
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*
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* It consists of the following parts:
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*
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* One-byte range:
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* ASCII p. 2 0x{00..7F}
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*
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* Two-byte range:
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* GBK part 1 p. 10..12 0x{A1..A9}{A1..FE}
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* GBK part 2 p. 13..36 0x{B0..F7}{A1..FE}
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* GBK part 3 p. 37..52 0x{81..A0}{40..7E,80..FE}
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* GBK part 4 p. 53..81 0x{AA..FE}{40..7E,80..A0}
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* GBK part 5 p. 82 0x{A8..A9}{40..7E,80..A0}
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* UDA part 1 p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233
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* UDA part 2 p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5
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* UDA part 3 p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765
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*
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* Four-byte range:
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* BMP rest p. 94..283 0x{81..84}{30..39}{81..FE}{30..39}
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* rest of U+0080..U+FFFF
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* Planes 1-16 p. 5 0x{90..FE}{30..39}{81..FE}{30..39}
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* U+10000..U+10FFFF
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*
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* To GBK part 1 were added:
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* 1. 0xA2E3, 0xA8BF.
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* 2. Characters mapped to the Unicode PUA
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* 0xA2AB..0xA2B0 U+E766..U+E76B
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* 0xA2E4 U+E76D
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* 0xA2EF..0xA2F0 U+E76E..U+E76F
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* 0xA2FD..0xA2FE U+E770..U+E771
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* 0xA4F4..0xA4FE U+E772..U+E77C
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* 0xA5F7..0xA5FE U+E77D..U+E784
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* 0xA6B9..0xA6C0 U+E785..U+E78C
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* 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793
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* 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795
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* 0xA6F3 [glyphs here!!] U+E796
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* 0xA6F6..0xA6FE U+E797..U+E79F
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* 0xA7C2..0xA7D0 U+E7A0..U+E7AE
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* 0xA7F2..0xA7FE U+E7AF..U+E7BB
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* 0xA8BC [glyphs here!!] U+E7C7
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* 0xA8C1..0xA8C4 U+E7C9..U+E7CC
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* 0xA8EA..0xA8FE U+E7CD..U+E7E1
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* 0xA9A1..0xA9A3 U+E7FE..U+E800
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* 0xA9F0..0xA9FE U+E801..U+E80F
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*
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* To GBK part 2 were added:
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* 3. Characters mapped to the Unicode PUA
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* 0xD7FA..0xD7FE U+E810..0xE814
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*
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* To GBK part 3 nothing was added.
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*
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* To GBK part 4 were added:
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* 4. 0xFE{50,54..58,5A..60,62..65,68..6B,6E..75,77..7D,80..8F,92..9F}.
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* 5. Characters mapped to the Unicode PUA
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* 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818
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* 0xFE59 [glyphs here!!] U+E81E
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* 0xFE61 [glyphs here!!] U+E826
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* 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C
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* 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832
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* 0xFE76 [glyphs here!!] U+E83B
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* 0xFE7E [glyphs here!!] U+E843
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* 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855
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* 0xFEA0 [glyphs here!!] U+E864
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*
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* To GBK part 5 were added:
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* 6. 0xA98A..0xA995.
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* 7. Characters mapped to the Unicode PUA
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* 0xA896..0xA8A0 U+E7BC..U+E7C6
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* 0xA958 U+E7E2
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* 0xA95B U+E7E3
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* 0xA95D..0xA95F U+E7E4..U+E7E6
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* 0xA997..0xA9A0 U+E7F4..U+E7FD
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*
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* UDA part 1 contains the user-defined characters, mapped to the Unicode PUA
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* U+E000..U+E233 in ascending order.
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*
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* UDA part 2 contains the user-defined characters, mapped to the Unicode PUA
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* U+E234..U+E4C5 in ascending order.
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*
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* UDA part 3 contains the user-defined characters, mapped to the Unicode PUA
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* U+E4C6..U+E765 in ascending order.
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*
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* The four-byte range 0x{81..84}{30..39}{81..FE}{30..39}
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* contains the rest of the Unicode BMP in ascending order.
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* Start: 0x81308130 = 0x0080
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* End: 0x8431A439 = 0xFFFF
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*
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* The four-byte range 0x{90..E3}{30..39}{81..FE}{30..39}
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* contains the remaining 16 Unicode planes in Unicode order.
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* Start: 0x90308130 = 0x010000
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* End: 0xE3329A35 = 0x10FFFF
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*
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*
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* Unassigned Unicode characters are mapped. For example,
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* U+173F = 0x8134BF35 (p. 120)
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* U+2EFF = 0x81398B31 (p. 148)
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* U+FFFE = 0x8431A438 (p. 283)
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*
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*
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* The Unicode PUA (U+E000..U+F8FF) is mapped as follows:
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* p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233
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* p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5
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* p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765
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* p. 10 0xA2AB..0xA2B0 U+E766..U+E76B
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* p. 255 0x8336C739 U+E76C
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* p. 10 0xA2E4 U+E76D
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* p. 10 0xA2EF..0xA2F0 U+E76E..U+E76F
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* p. 10 0xA2FD..0xA2FE U+E770..U+E771
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* p. 11 0xA4F4..0xA4FE U+E772..U+E77C
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* p. 11 0xA5F7..0xA5FE U+E77D..U+E784
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* p. 11 0xA6B9..0xA6C0 U+E785..U+E78C
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* p. 11 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793
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* p. 11 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795
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* p. 11 0xA6F3 [glyphs here!!] U+E796
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* p. 11 0xA6F6..0xA6FE U+E797..U+E79F
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* p. 12 0xA7C2..0xA7D0 U+E7A0..U+E7AE
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* p. 12 0xA7F2..0xA7FE U+E7AF..U+E7BB
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* p. 82 0xA896..0xA8A0 U+E7BC..U+E7C6
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* p. 12 0xA8BC [glyphs here!!] U+E7C7
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* p. 255 0x8336C830 U+E7C8
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* p. 12 0xA8C1..0xA8C4 U+E7C9..U+E7CC
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* p. 12 0xA8EA..0xA8FE U+E7CD..U+E7E1
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* p. 82 0xA958 U+E7E2
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* p. 82 0xA95B U+E7E3
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* p. 82 0xA95D..0xA95F U+E7E4..U+E7E6
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* p. 255 0x8336C831..0x8336C933 U+E7E7..U+E7F3
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* p. 82 0xA997..0xA9A0 U+E7F4..U+E7FD
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* p. 12 0xA9A1..0xA9A3 U+E7FE..U+E800
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* p. 12 0xA9F0..0xA9FE U+E801..U+E80F
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* p. 26 0xD7FA..0xD7FE U+E810..0xE814
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* p. 255 0x8336C934 U+E815
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* p. 81 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818
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* p. 255 0x8336C935..0x8336C939 U+E819..U+E81D
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* p. 81 0xFE59 [glyphs here!!] U+E81E
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* p. 255 0x8336CA30..0x8336CA36 U+E81F..U+E825
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* p. 81 0xFE61 [glyphs here!!] U+E826
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* p. 255 0x8336CA37..0x8336CB30 U+E827..U+E82A
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* p. 81 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C
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* p. 255 0x8336CB31..0x8336CB34 U+E82D..U+E830
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* p. 81 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832
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* p. 255 0x8336CB35..0x8336CC32 U+E833..U+E83A
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* p. 81 0xFE76 [glyphs here!!] U+E83B
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* p. 255 0x8336CC33..0x8336CC39 U+E83C..U+E842
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* p. 81 0xFE7E [glyphs here!!] U+E843
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* p. 255 0x8336CD30..0x8336CE35 U+E844..U+E853
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* p. 81 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855
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* p. 255 0x8336CE36..0x8336CF39 U+E856..U+E863
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* p. 81 0xFEA0 [glyphs here!!] U+E864
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* p. 255..276 0x8336D030..0x84308130 U+E865..U+F8FF
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*
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*
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* The Unicode surrogate area (U+D800..U+DFFF) is not mapped. (p. 255)
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*
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*/
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#include "gb18030ext.h"
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#include "gb18030uni.h"
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static int
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gb18030_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
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{
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int ret;
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/* Code set 0 (ASCII) */
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if (*s < 0x80)
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return ascii_mbtowc(conv,pwc,s,n);
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/* Code set 1 (GBK extended) */
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ret = gbk_mbtowc(conv,pwc,s,n);
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if (ret != RET_ILSEQ)
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return ret;
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ret = gb18030ext_mbtowc(conv,pwc,s,n);
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if (ret != RET_ILSEQ)
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return ret;
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/* Code set 2 (remainder of Unicode U+0000..U+FFFF), including
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User-defined characters, two-byte part of range U+E766..U+E864 */
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ret = gb18030uni_mbtowc(conv,pwc,s,n);
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if (ret != RET_ILSEQ)
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return ret;
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/* User-defined characters range U+E000..U+E765 */
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{
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unsigned char c1 = s[0];
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if ((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) {
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if (n >= 2) {
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unsigned char c2 = s[1];
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if (c2 >= 0xa1 && c2 <= 0xfe) {
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*pwc = 0xe000 + 94 * (c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c2 - 0xa1);
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return 2;
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}
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} else
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return RET_TOOFEW(0);
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} else if (c1 >= 0xa1 && c1 <= 0xa7) {
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if (n >= 2) {
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unsigned char c2 = s[1];
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if (c2 >= 0x40 && c2 <= 0xa1 && c2 != 0x7f) {
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*pwc = 0xe4c6 + 96 * (c1 - 0xa1) + c2 - (c2 >= 0x80 ? 0x41 : 0x40);
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return 2;
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}
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} else
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return RET_TOOFEW(0);
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}
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}
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/* Code set 3 (Unicode U+10000..U+10FFFF) */
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{
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unsigned char c1 = s[0];
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if (c1 >= 0x90 && c1 <= 0xe3) {
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if (n >= 2) {
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unsigned char c2 = s[1];
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if (c2 >= 0x30 && c2 <= 0x39) {
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if (n >= 3) {
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unsigned char c3 = s[2];
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if (c3 >= 0x81 && c3 <= 0xfe) {
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if (n >= 4) {
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unsigned char c4 = s[3];
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if (c4 >= 0x30 && c4 <= 0x39) {
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unsigned int i = (((c1 - 0x90) * 10 + (c2 - 0x30)) * 126 + (c3 - 0x81)) * 10 + (c4 - 0x30);
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if (i >= 0 && i < 0x100000) {
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*pwc = (ucs4_t) (0x10000 + i);
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return 4;
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}
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}
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return RET_ILSEQ;
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}
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return RET_TOOFEW(0);
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}
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return RET_ILSEQ;
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}
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return RET_TOOFEW(0);
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}
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return RET_ILSEQ;
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}
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return RET_TOOFEW(0);
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}
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return RET_ILSEQ;
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}
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}
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static const unsigned short gb18030_pua2charset[32*3] = {
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/* Unicode range GB18030 range */
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0xe766, 0xe76b, 0xa2ab, /*.. 0xa2b0, */
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0xe76d, 0xe76d, 0xa2e4,
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0xe76e, 0xe76f, 0xa2ef, /*.. 0xa2f0, */
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0xe770, 0xe771, 0xa2fd, /*.. 0xa2fe, */
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0xe772, 0xe77c, 0xa4f4, /*.. 0xa4fe, */
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0xe77d, 0xe784, 0xa5f7, /*.. 0xa5fe, */
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0xe785, 0xe78c, 0xa6b9, /*.. 0xa6c0, */
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0xe78d, 0xe793, 0xa6d9, /*.. 0xa6df, */
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0xe794, 0xe795, 0xa6ec, /*.. 0xa6ed, */
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0xe796, 0xe796, 0xa6f3,
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0xe797, 0xe79f, 0xa6f6, /*.. 0xa6fe, */
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0xe7a0, 0xe7ae, 0xa7c2, /*.. 0xa7d0, */
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0xe7af, 0xe7bb, 0xa7f2, /*.. 0xa7fe, */
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0xe7bc, 0xe7c6, 0xa896, /*.. 0xa8a0, */
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0xe7c7, 0xe7c7, 0xa8bc,
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0xe7c9, 0xe7cc, 0xa8c1, /*.. 0xa8c4, */
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0xe7cd, 0xe7e1, 0xa8ea, /*.. 0xa8fe, */
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0xe7e2, 0xe7e2, 0xa958,
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0xe7e3, 0xe7e3, 0xa95b,
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0xe7e4, 0xe7e6, 0xa95d, /*.. 0xa95f, */
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0xe7f4, 0xe800, 0xa997, /*.. 0xa9a3, */
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0xe801, 0xe80f, 0xa9f0, /*.. 0xa9fe, */
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0xe810, 0xe814, 0xd7fa, /*.. 0xd7fe, */
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0xe816, 0xe818, 0xfe51, /*.. 0xfe53, */
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0xe81e, 0xe81e, 0xfe59,
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0xe826, 0xe826, 0xfe61,
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0xe82b, 0xe82c, 0xfe66, /*.. 0xfe67, */
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0xe831, 0xe832, 0xfe6c, /*.. 0xfe6d, */
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0xe83b, 0xe83b, 0xfe76,
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0xe843, 0xe843, 0xfe7e,
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0xe854, 0xe855, 0xfe90, /*.. 0xfe91, */
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0xe864, 0xe864, 0xfea0,
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};
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static int
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gb18030_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
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{
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int ret;
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/* Code set 0 (ASCII) */
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ret = ascii_wctomb(conv,r,wc,n);
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if (ret != RET_ILUNI)
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return ret;
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/* Code set 1 (GBK extended) */
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ret = gbk_wctomb(conv,r,wc,n);
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if (ret != RET_ILUNI)
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return ret;
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ret = gb18030ext_wctomb(conv,r,wc,n);
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if (ret != RET_ILUNI)
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return ret;
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/* Code set 2 (remainder of Unicode U+0000..U+FFFF) */
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if (wc >= 0xe000 && wc <= 0xe864) {
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if (n >= 2) {
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if (wc < 0xe766) {
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/* User-defined characters range U+E000..U+E765 */
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if (wc < 0xe4c6) {
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unsigned int i = wc - 0xe000;
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r[1] = (i % 94) + 0xa1; i = i / 94;
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r[0] = (i < 6 ? i + 0xaa : i + 0xf2);
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return 2;
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} else {
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unsigned int i = wc - 0xe4c6;
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r[0] = (i / 96) + 0xa1; i = i % 96;
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r[1] = i + (i >= 0x3f ? 0x41 : 0x40);
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return 2;
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}
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} else {
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/* User-defined characters, two-byte part of range U+E766..U+E864 */
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unsigned int k1 = 0;
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unsigned int k2 = 32;
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/* Invariant: We know that if wc occurs in Unicode interval in
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gb18030_pua2charset, it does so at a k with k1 <= k < k2. */
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while (k1 < k2) {
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unsigned int k = (k1 + k2) / 2;
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if (wc < gb18030_pua2charset[k*3+0])
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k2 = k;
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else if (wc > gb18030_pua2charset[k*3+1])
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k1 = k + 1;
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else {
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unsigned short c =
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gb18030_pua2charset[k*3+2] + (wc - gb18030_pua2charset[k*3+0]);
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r[0] = (c >> 8);
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r[1] = (c & 0xff);
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return 2;
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}
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}
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}
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} else
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return RET_TOOSMALL;
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}
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ret = gb18030uni_wctomb(conv,r,wc,n);
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if (ret != RET_ILUNI)
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return ret;
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/* Code set 3 (Unicode U+10000..U+10FFFF) */
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if (n >= 4) {
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if (wc >= 0x10000 && wc < 0x110000) {
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unsigned int i = wc - 0x10000;
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r[3] = (i % 10) + 0x30; i = i / 10;
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r[2] = (i % 126) + 0x81; i = i / 126;
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r[1] = (i % 10) + 0x30; i = i / 10;
|
|
r[0] = i + 0x90;
|
|
return 4;
|
|
}
|
|
return RET_ILUNI;
|
|
}
|
|
return RET_TOOSMALL;
|
|
}
|