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Create a branch for audio work

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svn path=/branches/audio-bringup/; revision=49478
This commit is contained in:
Timo Kreuzer 2010-11-05 11:04:48 +00:00
parent 26c20f3857
commit 5eb25b5c24
20759 changed files with 0 additions and 1141005 deletions
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125
lib/sdk/crt/string/strtold.c Normal file
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/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <stdlib.h>
#include <msvcrt/ctype.h>
static double powten[] =
{
1e1L, 1e2L, 1e4L, 1e8L, 1e16L, 1e32L, 1e64L, 1e128L, 1e256L,
#ifdef __GNUC__
1e512L, 1e512L*1e512L, 1e2048L, 1e4096L
#else
1e256L, 1e256L, 1e256L, 1e256L
#endif
};
long double
_strtold(const char *s, char **sret)
{
double r; /* result */
int e, ne; /* exponent */
int sign; /* +- 1.0 */
int esign;
int flags=0;
int l2powm1;
r = 0.0L;
sign = 1;
e = ne = 0;
esign = 1;
while(*s && isspace(*s))
s++;
if (*s == '+')
s++;
else if (*s == '-')
{
sign = -1;
s++;
}
while ((*s >= '0') && (*s <= '9'))
{
flags |= 1;
r *= 10.0L;
r += *s - '0';
s++;
}
if (*s == '.')
{
s++;
while ((*s >= '0') && (*s <= '9'))
{
flags |= 2;
r *= 10.0L;
r += *s - '0';
s++;
ne++;
}
}
if (flags == 0)
{
if (sret)
*sret = (char *)s;
return 0.0L;
}
if ((*s == 'e') || (*s == 'E'))
{
s++;
if (*s == '+')
s++;
else if (*s == '-')
{
s++;
esign = -1;
}
while ((*s >= '0') && (*s <= '9'))
{
e *= 10;
e += *s - '0';
s++;
}
}
if (esign < 0)
{
esign = -esign;
e = -e;
}
e = e - ne;
if (e < -4096)
{
/* possibly subnormal number, 10^e would overflow */
r *= 1.0e-2048L;
e += 2048;
}
if (e < 0)
{
e = -e;
esign = -esign;
}
if (e >= 8192)
e = 8191;
if (e)
{
double d = 1.0L;
l2powm1 = 0;
while (e)
{
if (e & 1)
d *= powten[l2powm1];
e >>= 1;
l2powm1++;
}
if (esign > 0)
r *= d;
else
r /= d;
}
if (sret)
*sret = (char *)s;
return r * sign;
return 0;
}