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Added Hoehrmann's UTF-8 decoder in perftest for reference

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Minor optimization on UTF-8 validation

git-svn-id: https://rapidjson.googlecode.com/svn/trunk@37 c5894555-1306-4e8d-425f-1f6f381ee07c
This commit is contained in:
miloyip@gmail.com 2011-11-24 08:00:22 +00:00
parent 66754fc5b0
commit 32e001c684
1 changed files with 9 additions and 8 deletions
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17
include/rapidjson/rapidjson.h
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@ -372,21 +372,22 @@ struct UTF8 {
10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
};
#define COPY() os.Put(c = is.Take())
#define TRANS(mask) if (!(type[(unsigned char)c] & mask)) return false
#define TRANS(mask) result &= ((type[(unsigned char)c] & mask) != 0)
#define TAIL() COPY(); TRANS(0x70)
Ch c;
COPY();
if (!(c & 0x80))
return true;
bool result = true;
switch (type[(unsigned char)c]) {
case 2: TAIL(); return true;
case 3: TAIL(); TAIL(); return true;
case 4: COPY(); TRANS(0x50); TAIL(); return true;
case 5: COPY(); TRANS(0x10); COPY(); TAIL(); return true;
case 6: TAIL(); TAIL(); TAIL(); return true;
case 10: COPY(); TRANS(0x20); TAIL(); return true;
case 11: COPY(); TRANS(0x60); TAIL(); return true;
case 2: TAIL(); return result;
case 3: TAIL(); TAIL(); return result;
case 4: COPY(); TRANS(0x50); TAIL(); return result;
case 5: COPY(); TRANS(0x10); COPY(); TAIL(); return result;
case 6: TAIL(); TAIL(); TAIL(); return result;
case 10: COPY(); TRANS(0x20); TAIL(); return result;
case 11: COPY(); TRANS(0x60); TAIL(); return result;
default: return false;
}
#undef COPY