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Test cases for printf of double overflows. (CVS 1260)

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FossilOrigin-Name: 96a6d2d3ff5bd0aaff188ee1c5e2f02cbea435b2
This commit is contained in:
drh
2004-02-21 19:41:04 +00:00
parent 3e7bc9ca1c
commit b621c23775
5 changed files with 58 additions and 17 deletions
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11
src/printf.c
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@@ -411,12 +411,11 @@ static int vxprintf(
/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
exp = 0;
if( realvalue>0.0 ){
int k = 0;
while( realvalue>=1e8 && k++<100 ){ realvalue *= 1e-8; exp+=8; }
while( realvalue>=10.0 && k++<100 ){ realvalue *= 0.1; exp++; }
while( realvalue<1e-8 && k++<100 ){ realvalue *= 1e8; exp-=8; }
while( realvalue<1.0 && k++<100 ){ realvalue *= 10.0; exp--; }
if( k>=100 ){
while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; }
while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; }
if( exp>350 || exp<-350 ){
bufpt = "NaN";
length = 3;
break;