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fix failure to read infinity in scanf

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this code worked in strtod, but not in scanf. more evidence that i
should design a better interface for discarding multiple tail
characters than just calling unget repeatedly...
This commit is contained in:
Rich Felker
2012-04-17 22:05:51 -04:00
parent bb477f9fd4
commit dad4040770
1 changed files with 4 additions and 3 deletions
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5
src/internal/floatscan.c
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@ -428,9 +428,10 @@ long double __floatscan(FILE *f, int c, int prec, int pok)
for (i=0; i<8 && (c|32)=="infinity"[i]; i++) for (i=0; i<8 && (c|32)=="infinity"[i]; i++)
if (i<7) c = shgetc(f); if (i<7) c = shgetc(f);
if (i==3 || i==8 || (i>3 && pok)) { if (i==3 || i==8 || (i>3 && pok)) {
if (i==3) shunget(f); if (i!=8) {
shunget(f);
if (pok) for (; i>3; i--) shunget(f); if (pok) for (; i>3; i--) shunget(f);
else shlim(f, 0); }
return sign * INFINITY; return sign * INFINITY;
} }
if (!i) for (i=0; i<3 && (c|32)=="nan"[i]; i++) if (!i) for (i=0; i<3 && (c|32)=="nan"[i]; i++)