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Added referenced performance of UTF-8 validation

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git-svn-id: https://rapidjson.googlecode.com/svn/trunk@36 c5894555-1306-4e8d-425f-1f6f381ee07c
This commit is contained in:
miloyip@gmail.com 2011-11-24 07:50:59 +00:00
parent a45bcbba7b
commit 66754fc5b0
3 changed files with 66 additions and 4 deletions
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61
test/perftest/misctest.cpp Normal file
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@ -0,0 +1,61 @@
#include "perftest.h"
#if TEST_MISC
class Misc : public PerfTest {
};
// Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de>
// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
#define UTF8_ACCEPT 0
#define UTF8_REJECT 12
static const unsigned char utf8d[] = {
// The first part of the table maps bytes to character classes that
// to reduce the size of the transition table and create bitmasks.
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
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,
// The second part is a transition table that maps a combination
// of a state of the automaton and a character class to a state.
0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
12,36,12,12,12,12,12,12,12,12,12,12,
};
static unsigned inline decode(unsigned* state, unsigned* codep, unsigned byte) {
unsigned type = utf8d[byte];
*codep = (*state != UTF8_ACCEPT) ?
(byte & 0x3fu) | (*codep << 6) :
(0xff >> type) & (byte);
*state = utf8d[256 + *state + type];
return *state;
}
static bool IsUTF8(unsigned char* s) {
unsigned codepoint, state = 0;
while (*s)
decode(&state, &codepoint, *s++);
return state == UTF8_ACCEPT;
}
TEST_F(Misc, Hoehrmann_IsUTF8) {
for (int i = 0; i < kTrialCount; i++) {
EXPECT_TRUE(IsUTF8((unsigned char*)json_));
}
}
#endif // TEST_ULTRAJSON

1
test/perftest/perftest.h
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@ -6,6 +6,7 @@
#define TEST_YAJL 0
#define TEST_ULTRAJSON 0
#define TEST_PLATFORM 0
#define TEST_MISC 1
#if TEST_RAPIDJSON
//#define RAPIDJSON_SSE2

8
test/perftest/rapidjsontest.cpp
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@ -233,14 +233,14 @@ TEST_F(RapidJson, SIMD_SUFFIX(Whitespace)) {
}
TEST_F(RapidJson, UTF8_Validate) {
StringBuffer os(0, length_ + 1);
NullStream os;
for (int i = 0; i < kTrialCount; i++) {
StringStream is(json_);
os.Clear();
bool result = true;
while (is.Peek() != '\0')
UTF8<>::Validate(is, os);
EXPECT_EQ(length_, os.GetSize());
result &= UTF8<>::Validate(is, os);
EXPECT_TRUE(result);
}
}