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