#include "fileops.h"

int gitfo_read(git_file fd, void *buf, size_t cnt)
{
	char *b = buf;
	while (cnt) {
		ssize_t r = read(fd, b, cnt);
		if (r < 0) {
			if (errno == EINTR || errno == EAGAIN)
				continue;
			return -1;
		}
		if (!r) {
			errno = EPIPE;
			return -1;
		}
		cnt -= r;
		b += r;
	}
	return GIT_SUCCESS;
}

int gitfo_write(git_file fd, void *buf, size_t cnt)
{
	char *b = buf;
	while (cnt) {
		ssize_t r = write(fd, b, cnt);
		if (r < 0) {
			if (errno == EINTR || errno == EAGAIN)
				continue;
			return -1;
		}
		if (!r) {
			errno = EPIPE;
			return -1;
		}
		cnt -= r;
		b += r;
	}
	return GIT_SUCCESS;
}

off_t gitfo_size(git_file fd)
{
	gitfo_statbuf sb;
	if (fstat(fd, &sb))
		return -1;
	return sb.st_size;
}