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Progress towards fixing corner-case floating-point formatting issues.

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FossilOrigin-Name: 1138b8d16edef16d2943d407e289d07d546a14e64c3efa3c94127631e06fafeb
This commit is contained in:
drh
2023-07-01 14:03:50 +00:00
parent 3f073f9ef8
commit 42d042e602
4 changed files with 29 additions and 16 deletions
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12
src/util.c
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@@ -957,7 +957,7 @@ void sqlite3FpDecode(FpDecode *p, double r, int iRound){
}
memcpy(&v,&r,8);
e = v>>52;
if( e==0x7ff ){
if( (e&0x7ff)==0x7ff ){
if( v==0x7ff0000000000000L ){
p->isInf = 1;
p->isNan = 0;
@@ -996,7 +996,15 @@ void sqlite3FpDecode(FpDecode *p, double r, int iRound){
while( v ){ p->z[i--] = (v%10) + '0'; v /= 10; }
p->n = sizeof(p->z) - 1 - i;
p->iDP = p->n + exp;
if( iRound<0 ) iRound = p->iDP - iRound;
if( iRound<0 ){
iRound = p->iDP - iRound;
if( iRound==0 && p->z[i+1]>='5' ){
iRound = 1;
p->z[i--] = '0';
p->n++;
p->iDP++;
}
}
if( iRound>0 && iRound<p->n ){
char *z = &p->z[i+1];
p->n = iRound;