strtod.c\stdlib\src - musl - musl - an implementation of the standard library for Linux-based systems

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path: root/src/stdlib/strtod.c
blob: a898b1d421867146ac662e512894e4a67f6486c2 (plain) (blame)
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#include <stdlib.h>
#include "shgetc.h"
#include "floatscan.h"
#include "stdio_impl.h"
static long double strtox(const char *s, char **p, int prec)
{
	FILE f = {
		.buf = (void *)s, .rpos = (void *)s,
		.rend = (void *)-1, .lock = -1
	};
	shlim(&f, 0);
	long double y = __floatscan(&f, prec, 1);
	off_t cnt = shcnt(&f);
	if (p) *p = cnt ? (char *)s + cnt : (char *)s;
	return y;
}
float strtof(const char *restrict s, char **restrict p)
{
	return strtox(s, p, 0);
}
double strtod(const char *restrict s, char **restrict p)
{
	return strtox(s, p, 1);
}
long double strtold(const char *restrict s, char **restrict p)
{
	return strtox(s, p, 2);
}
weak_alias(strtof, strtof_l);
weak_alias(strtod, strtod_l);
weak_alias(strtold, strtold_l);
weak_alias(strtof, __strtof_l);
weak_alias(strtod, __strtod_l);
weak_alias(strtold, __strtold_l);
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