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| 1 import sys | |
| 2 | |
| 3 # http://www.unicode.org/Public/UNIDATA/auxiliary/BidiMirroring.txt | |
| 4 | |
| 5 # This parses a file in the format of the above file and outputs a table | |
| 6 # suitable for bsearch(3). This table maps Unicode code points to their | |
| 7 # 'mirror'. (Mirroring is used when rendering RTL characters, see the Unicode | |
| 8 # standard). By convention, this mapping should be commutative, but this code | |
| 9 # doesn't enforce or check this. | |
| 10 | |
| 11 def main(infile, outfile): | |
| 12 pairs = [] | |
| 13 for line in infile: | |
| 14 line = line[:-1] | |
| 15 if len(line) == 0 or line[0] == '#': | |
| 16 continue | |
| 17 if '#' in line: | |
| 18 (data, _) = line.split('#', 1) | |
| 19 else: | |
| 20 data = line | |
| 21 if ';' not in data: | |
| 22 continue | |
| 23 (a, b) = data.split(';', 1) | |
| 24 a = int(a, 16) | |
| 25 b = int(b, 16) | |
| 26 | |
| 27 pairs.append((a, b)) | |
| 28 | |
| 29 pairs.sort() | |
| 30 | |
| 31 print >>outfile, '// Generated from Unicode Bidi Mirroring tables\n' | |
| 32 print >>outfile, '#ifndef MIRRORING_PROPERTY_H_' | |
| 33 print >>outfile, '#define MIRRORING_PROPERTY_H_\n' | |
| 34 print >>outfile, '#include <stdint.h>' | |
| 35 print >>outfile, 'struct mirroring_property {' | |
| 36 print >>outfile, ' uint32_t a;' | |
| 37 print >>outfile, ' uint32_t b;' | |
| 38 print >>outfile, '};\n' | |
| 39 print >>outfile, 'static const struct mirroring_property mirroring_properties[
] = {' | |
| 40 for pair in pairs: | |
| 41 print >>outfile, ' {0x%x, 0x%x},' % pair | |
| 42 print >>outfile, '};\n' | |
| 43 print >>outfile, 'static const unsigned mirroring_properties_count = %d;\n' %
len(pairs) | |
| 44 print >>outfile, '#endif // MIRRORING_PROPERTY_H_' | |
| 45 | |
| 46 if __name__ == '__main__': | |
| 47 if len(sys.argv) != 3: | |
| 48 print 'Usage: %s <input .txt> <output .h>' % sys.argv[0] | |
| 49 else: | |
| 50 main(file(sys.argv[1], 'r'), file(sys.argv[2], 'w+')) | |
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