yyc12345/stb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'fix-percent-check' of https://github.com/d26435/stb into working

Browse Source
This commit is contained in:
Sean Barrett 2017-01-15 23:43:53 -08:00
commit 80a39f958f
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
stb_sprintf.h
View File

@ -247,9 +247,12 @@ STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsprintfcb )( STBSP_SPRINTFCB * callb
} }
for(;;) 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; stbsp__uint32 v,c;
v=*(stbsp__uint32*)f; c=(~v)&0x80808080; 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 ((v-0x01010101)&c) goto schk2;
if (callback) if ((STB_SPRINTF_MIN-(int)(bf-buf))<4) goto schk1; if (callback) if ((STB_SPRINTF_MIN-(int)(bf-buf))<4) goto schk1;
*(stbsp__uint32*)bf=v; bf+=4; f+=4; *(stbsp__uint32*)bf=v; bf+=4; f+=4;