mirror of
https://github.com/mozilla/gecko-dev.git
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78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this file,
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# You can obtain one at http://mozilla.org/MPL/2.0/.
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import os.path
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import re
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import sys
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f = open(sys.argv[1] if len(sys.argv) > 1 else 'StandardizedVariants.txt')
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line = f.readline()
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m = re.compile('^# (StandardizedVariants(-\d+(\.\d+)*)?\.txt)').search(line)
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fileversion = m.group(1)
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vsdict = {}
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r = re.compile('^([0-9A-F]{4,6}) (FE0[0-9A-F]); CJK COMPATIBILITY IDEOGRAPH-([0-9A-F]{4,6});')
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while True:
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line = f.readline()
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if not line:
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break
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if not 'CJK COMPATIBILITY IDEOGRAPH-' in line:
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continue
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m = r.search(line)
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unified = int(m.group(1), 16)
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vs = int(m.group(2), 16)
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compat = int(m.group(3), 16)
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if not vs in vsdict:
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vsdict[vs] = {}
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vsdict[vs][unified] = compat
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f.close
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offsets = []
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length = 10 + 11 * len(vsdict)
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for (k, mappings) in sorted(vsdict.items()):
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offsets.append(length)
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length += 4 + 5 * len(mappings)
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f = open(sys.argv[2] if len(sys.argv) > 2 else 'CJKCompatSVS.cpp', 'wb')
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f.write("""// Generated by %s. Do not edit.
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#include <stdint.h>
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#define U16(v) (((v) >> 8) & 0xFF), ((v) & 0xFF)
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#define U24(v) (((v) >> 16) & 0xFF), (((v) >> 8) & 0xFF), ((v) & 0xFF)
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#define U32(v) (((v) >> 24) & 0xFF), (((v) >> 16) & 0xFF), (((v) >> 8) & 0xFF), ((v) & 0xFF)
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#define GLYPH(v) U16(v >= 0x2F800 ? (v) - (0x2F800 - 0xFB00) : (v))
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// Fallback mappings for CJK Compatibility Ideographs Standardized Variants
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// taken from %s.
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// Using OpenType format 14 cmap subtable structure to reuse the lookup code
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// for fonts. The glyphID field is used to store the corresponding codepoints
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// CJK Compatibility Ideographs. To fit codepoints into the 16-bit glyphID
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// field, CJK Compatibility Ideographs Supplement (U+2F800..U+2FA1F) will be
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// mapped to 0xFB00..0xFD1F.
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extern const uint8_t sCJKCompatSVSTable[] = {
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""" % (os.path.basename(sys.argv[0]), fileversion))
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f.write(' U16(14), // format\n')
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f.write(' U32(%d), // length\n' % length)
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f.write(' U32(%d), // numVarSelectorRecords\n' % len(vsdict))
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for i, k in enumerate(sorted(vsdict.keys())):
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f.write(' U24(0x%04X), U32(0), U32(%d), // varSelectorRecord[%d]\n' % (k, offsets[i], i))
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for (k, mappings) in sorted(vsdict.items()):
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f.write(' // 0x%04X\n' % k)
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f.write(' U32(%d), // numUVSMappings\n' % len(mappings))
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for (unified, compat) in sorted(mappings.items()):
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f.write(' U24(0x%04X), GLYPH(0x%04X),\n' % (unified, compat))
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f.write("""};
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#undef U16
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#undef U24
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#undef U32
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#undef GLYPH
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static_assert(sizeof sCJKCompatSVSTable == %d, "Table generator has a bug.");
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""" % length)
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