Function compareFiles

ThirdParty/libxml2/vtklibxml2/runtest.c:358–416

}

static int compareFiles(const char *r1 /* temp */, const char *r2 /* result */) {
    int res1, res2, total;
    int fd1, fd2;
    char bytes1[4096];
    char bytes2[4096];

    if (update_results) {
        fd1 = open(r1, RD_FLAGS);
        if (fd1 < 0)
            return(-1);
        fd2 = open(r2, WR_FLAGS, 0644);
        if (fd2 < 0) {
            close(fd1);
            return(-1);
        }
        total = 0;
        do {
            res1 = read(fd1, bytes1, 4096);
            if (res1 <= 0)
                break;
            total += res1;
            res2 = write(fd2, bytes1, res1);
            if (res2 <= 0 || res2 != res1)
                break;
        } while (1);
        close(fd2);
        close(fd1);
        if (total == 0)
            unlink(r2);
        return(res1 != 0);
    }

    fd1 = open(r1, RD_FLAGS);
    if (fd1 < 0)
        return(-1);
    fd2 = open(r2, RD_FLAGS);
    while (1) {
        res1 = read(fd1, bytes1, 4096);
        res2 = fd2 >= 0 ? read(fd2, bytes2, 4096) : 0;
	if ((res1 != res2) || (res1 < 0)) {
	    close(fd1);
            if (fd2 >= 0)
                close(fd2);
	    return(1);
	}
	if (res1 == 0)
	    break;
	if (memcmp(bytes1, bytes2, res1) != 0) {
	    close(fd1);
            if (fd2 >= 0)
                close(fd2);
	    return(1);
	}
    }
    close(fd1);
    if (fd2 >= 0)
        close(fd2);
    return(0);