reactos/sdk/lib/crt/string/wcstod.c

101 lines
1.5 KiB
C

/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <stdlib.h>
/*
* @implemented
*/
#if 0 //FIXME: Compare with wcstod in wcs.c
double wcstod(const wchar_t *s, wchar_t **sret)
{
long double r; /* result */
int e; /* exponent */
long double d; /* scale */
int sign; /* +- 1.0 */
int esign;
int i;
int flags=0;
r = 0.0;
sign = 1;
e = 0;
esign = 1;
while ((*s == L' ') || (*s == L'\t'))
s++;
if (*s == L'+')
s++;
else if (*s == L'-')
{
sign = -1;
s++;
}
while ((*s >= L'0') && (*s <= L'9'))
{
flags |= 1;
r *= 10.0;
r += *s - L'0';
s++;
}
if (*s == L'.')
{
d = 0.1L;
s++;
while ((*s >= L'0') && (*s <= L'9'))
{
flags |= 2;
r += d * (*s - L'0');
s++;
d *= 0.1L;
}
}
if (flags == 0)
{
if (sret)
*sret = (wchar_t *)s;
return 0;
}
if ((*s == L'e') || (*s == L'E'))
{
s++;
if (*s == L'+')
s++;
else if (*s == L'-')
{
s++;
esign = -1;
}
if ((*s < L'0') || (*s > L'9'))
{
if (sret)
*sret = (wchar_t *)s;
return r;
}
while ((*s >= L'0') && (*s <= L'9'))
{
e *= 10;
e += *s - L'0';
s++;
}
}
if (esign < 0)
for (i = 1; i <= e; i++)
r *= 0.1L;
else
for (i = 1; i <= e; i++)
r *= 10.0;
if (sret)
*sret = (wchar_t *)s;
return r * sign;
}
#endif