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Fix the check for a percent character 

It was matching everything less than 0x26, so could cause a minor
performance loss. Also made the second if statement superfluous.
pull/381/head
Daniel 2016-12-05 21:03:05 +00:00
parent bec0b26d1e
commit 4338a0e55e
1 changed files with 4 additions and 1 deletions
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5
stb_sprintf.h
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@ -247,9 +247,12 @@ STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsprintfcb )( STBSP_SPRINTFCB * callb
}
for(;;)
{
// Check if the next 4 bytes contain %(0x25) or end of string.
// Using the 'hasless' trick:
// https://graphics.stanford.edu/~seander/bithacks.html#HasLessInWord
stbsp__uint32 v,c;
v=*(stbsp__uint32*)f; c=(~v)&0x80808080;
if ((v-0x26262626)&c) goto schk1;
if (((v^0x25252525)-0x01010101)&c) goto schk1;
if ((v-0x01010101)&c) goto schk2;
if (callback) if ((STB_SPRINTF_MIN-(int)(bf-buf))<4) goto schk1;
*(stbsp__uint32*)bf=v; bf+=4; f+=4;