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

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path: root/src/stdio/fwrite.c
blob: 7a567b2c55a94b30288444bd93f6fc48fff7e433 (plain) (blame)
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#include "stdio_impl.h"
#include <string.h>
size_t __fwritex(const unsigned char *restrict s, size_t l, FILE *restrict f)
{
	size_t i=0;
	if (!f->wend && __towrite(f)) return 0;
	if (l > f->wend - f->wpos) return f->write(f, s, l);
	if (f->lbf >= 0) {
		/* Match /^(.*\n|)/ */
		for (i=l; i && s[i-1] != '\n'; i--);
		if (i) {
			size_t n = f->write(f, s, i);
			if (n < i) return n;
			s += i;
			l -= i;
		}
	}
	memcpy(f->wpos, s, l);
	f->wpos += l;
	return l+i;
}
size_t fwrite(const void *restrict src, size_t size, size_t nmemb, FILE *restrict f)
{
	size_t k, l = size*nmemb;
	if (!size) nmemb = 0;
	FLOCK(f);
	k = __fwritex(src, l, f);
	FUNLOCK(f);
	return k==l ? nmemb : k/size;
}
weak_alias(fwrite, fwrite_unlocked);
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