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58 lines
1.2 KiB
Python
58 lines
1.2 KiB
Python
# Needs UnicodeData.txt in the current directory.
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#
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# It can be obtained from unicode.org:
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# - http://www.unicode.org/Public/<VERSION>/ucd/UnicodeData.txt
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#
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# If executed as a script, it will generate the contents of the file
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# python3 scripts/generate_unicode_tolower.py header > `src/base/unicode/tolower.h`,
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# python3 scripts/generate_unicode_tolower.py data > `src/base/unicode/tolower_data.h`.
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import sys
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import unicode
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def generate_cases():
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ud = unicode.data()
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return [(unicode.unhex(u["Value"]), unicode.unhex(u["Simple_Lowercase_Mapping"])) for u in ud if u["Simple_Lowercase_Mapping"]]
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def gen_header(cases):
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print(f"""\
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#include <cstdint>
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struct UPPER_LOWER
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{{
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\tint32_t upper;
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\tint32_t lower;
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}};
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enum
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{{
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\tNUM_TOLOWER = {len(cases)},
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}};
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extern const struct UPPER_LOWER tolowermap[];""")
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def gen_data(cases):
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print("""\
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#ifndef TOLOWER_DATA
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#error "This file must only be included in `tolower.cpp`"
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#endif
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const struct UPPER_LOWER tolowermap[] = {""")
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for upper_code, lower_code in cases:
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print(f"\t{{{upper_code}, {lower_code}}},")
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print("};")
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def main():
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cases = generate_cases()
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header = "header" in sys.argv
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data = "data" in sys.argv
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if header:
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gen_header(cases)
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elif data:
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gen_data(cases)
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if __name__ == '__main__':
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main()
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