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#ifdef __wasilibc_unmodified_upstream // Changes to optimize printf/scanf when long double isn't needed
#else
#include "printscan.h"
#endif
#include "shgetc.h"
#include "floatscan.h"
#include "stdio_impl.h"
#include <wchar.h>
#include <wctype.h>
/* This read function heavily cheats. It knows:
* (1) len will always be 1
* (2) non-ascii characters don't matter */
static size_t do_read(FILE *f, unsigned char *buf, size_t len)
{
size_t i;
const wchar_t *wcs = f->cookie;
if (!wcs[0]) wcs=L"@";
for (i=0; i<f->buf_size && wcs[i]; i++)
f->buf[i] = wcs[i] < 128 ? wcs[i] : '@';
f->rpos = f->buf;
f->rend = f->buf + i;
f->cookie = (void *)(wcs+i);
if (i && len) {
*buf = *f->rpos++;
return 1;
}
return 0;
}
#if defined(__wasilibc_printscan_no_long_double)
static long_double wcstox(const wchar_t *s, wchar_t **p, int prec)
#else
static long double wcstox(const wchar_t *s, wchar_t **p, int prec)
#endif
{
wchar_t *t = (wchar_t *)s;
unsigned char buf[64];
FILE f = {0};
f.flags = 0;
f.rpos = f.rend = f.buf = buf + 4;
f.buf_size = sizeof buf - 4;
#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
f.lock = -1;
#endif
f.read = do_read;
while (iswspace(*t)) t++;
f.cookie = (void *)t;
shlim(&f, 0);
#if defined(__wasilibc_printscan_no_long_double)
long_double y = __floatscan(&f, prec, 1);
#else
long double y = __floatscan(&f, prec, 1);
#endif
if (p) {
size_t cnt = shcnt(&f);
*p = cnt ? t + cnt : (wchar_t *)s;
}
return y;
}
float wcstof(const wchar_t *restrict s, wchar_t **restrict p)
{
return wcstox(s, p, 0);
}
double wcstod(const wchar_t *restrict s, wchar_t **restrict p)
{
return wcstox(s, p, 1);
}
long double wcstold(const wchar_t *restrict s, wchar_t **restrict p)
{
#if defined(__wasilibc_printscan_no_long_double)
long_double_not_supported();
#else
return wcstox(s, p, 2);
#endif
}
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