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Create a branch for header work.

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svn path=/branches/header-work/; revision=45691
This commit is contained in:
Timo Kreuzer 2010-02-26 22:57:55 +00:00
parent 14fe274b1c
commit 9ea495ba33
19538 changed files with 0 additions and 1063950 deletions
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103
lib/sdk/crt/string/strtod.c Normal file
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/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <precomp.h>
/*
* @implemented
*/
double
strtod(const char *s, char **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;
if (s == NULL)
return r;
while ((*s == ' ') || (*s == '\t'))
s++;
if (*s == '+')
s++;
else if (*s == '-')
{
sign = -1;
s++;
}
while ((*s >= '0') && (*s <= '9'))
{
flags |= 1;
r *= 10.0;
r += *s - '0';
s++;
}
if (*s == '.')
{
d = 0.1L;
s++;
while ((*s >= '0') && (*s <= '9'))
{
flags |= 2;
r += d * (*s - '0');
s++;
d *= 0.1L;
}
}
if (flags == 0)
{
if (sret)
*sret = (char *)s;
return 0;
}
if ((*s == 'e') || (*s == 'E'))
{
s++;
if (*s == '+')
s++;
else if (*s == '-')
{
s++;
esign = -1;
}
if ((*s < '0') || (*s > '9'))
{
if (sret)
*sret = (char *)s;
return r;
}
while ((*s >= '0') && (*s <= '9'))
{
e *= 10;
e += *s - '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 = (char *)s;
return r * sign;
}