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65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
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// Copyright 2008 The RE2 Authors. All Rights Reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Unicode character groups.
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// The codes get split into ranges of 16-bit codes
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// and ranges of 32-bit codes. It would be simpler
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// to use only 32-bit ranges, but these tables are large
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// enough to warrant extra care.
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//
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// Using just 32-bit ranges gives 27 kB of data.
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// Adding 16-bit ranges gives 18 kB of data.
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// Adding an extra table of 16-bit singletons would reduce
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// to 16.5 kB of data but make the data harder to use;
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// we don't bother.
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#ifndef RE2_UNICODE_GROUPS_H__
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#define RE2_UNICODE_GROUPS_H__
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#include "util/util.h"
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namespace re2 {
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struct URange16
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{
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uint16 lo;
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uint16 hi;
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};
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struct URange32
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{
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uint32 lo;
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uint32 hi;
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};
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struct UGroup
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{
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const char *name;
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int sign; // +1 for [abc], -1 for [^abc]
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const URange16 *r16;
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int nr16;
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const URange32 *r32;
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int nr32;
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};
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// Named by property or script name (e.g., "Nd", "N", "Han").
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// Negated groups are not included.
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extern const UGroup unicode_groups[];
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extern const int num_unicode_groups;
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// Named by POSIX name (e.g., "[:alpha:]", "[:^lower:]").
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// Negated groups are included.
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extern const UGroup posix_groups[];
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extern const int num_posix_groups;
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// Named by Perl name (e.g., "\\d", "\\D").
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// Negated groups are included.
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extern const UGroup perl_groups[];
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extern const int num_perl_groups;
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} // namespace re2
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#endif // RE2_UNICODE_GROUPS_H__
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