diff options
Diffstat (limited to 'src/printf.c')
| -rw-r--r-- | src/printf.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/printf.c b/src/printf.c index 0f66bc29f..f1634799b 100644 --- a/src/printf.c +++ b/src/printf.c @@ -99,6 +99,12 @@ static const et_info fmtinfo[] = { { 'r', 10, 1, etORDINAL, 0, 0 }, }; +/* Floating point constants used for rounding */ +static const double arRound[] = { + 5.0e-01, 5.0e-02, 5.0e-03, 5.0e-04, 5.0e-05, + 5.0e-06, 5.0e-07, 5.0e-08, 5.0e-09, 5.0e-10, +}; + /* ** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point ** conversions will work. @@ -517,8 +523,13 @@ void sqlite3_str_vappendf( } if( xtype==etGENERIC && precision>0 ) precision--; testcase( precision>0xfff ); - for(idx=precision&0xfff, rounder=0.5; idx>0; idx--, rounder*=0.1){} - if( xtype==etFLOAT ) realvalue += rounder; + idx = precision & 0xfff; + rounder = arRound[idx%10]; + while( idx>=10 ){ rounder *= 1.0e-10; idx -= 10; } + if( xtype==etFLOAT ){ + if( precision<17) rounder += realvalue*2.0e-16; + realvalue += rounder; + } /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ exp = 0; if( sqlite3IsNaN((double)realvalue) ){ |