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msvcrt: Improved strtod_l precision.

This commit is contained in:
Piotr Caban 2012-11-06 10:33:51 +01:00 committed by Alexandre Julliard
parent 505e5a162f
commit cbb94b1fcc
1 changed files with 12 additions and 5 deletions
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17
dlls/msvcrt/string.c
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@ -291,7 +291,8 @@ double CDECL MSVCRT_strtod_l( const char *str, char **end, MSVCRT__locale_t loca
int exp=0, sign=1;
const char *p;
double ret;
BOOL found_digit = FALSE;
long double lret=1, expcnt = 10;
BOOL found_digit = FALSE, negexp;
if (!MSVCRT_CHECK_PMT(str != NULL)) return 0;
@ -378,10 +379,16 @@ double CDECL MSVCRT_strtod_l( const char *str, char **end, MSVCRT__locale_t loca
_control87(MSVCRT__EM_DENORMAL|MSVCRT__EM_INVALID|MSVCRT__EM_ZERODIVIDE
|MSVCRT__EM_OVERFLOW|MSVCRT__EM_UNDERFLOW|MSVCRT__EM_INEXACT, 0xffffffff);
if(exp>0)
ret = (double)sign*d*pow(10, exp);
else
ret = (double)sign*d/pow(10, -exp);
negexp = (exp < 0);
if(negexp)
exp = -exp;
while(exp) {
if(exp & 1)
lret *= expcnt;
exp /= 2;
expcnt = expcnt*expcnt;
}
ret = (long double)sign * (negexp ? d/lret : d*lret);
_control87(fpcontrol, 0xffffffff);