litespeed-quic/test/unittests/test_varint.c

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/* Copyright (c) 2017 - 2019 LiteSpeed Technologies Inc. See LICENSE. */
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include "lsquic_varint.h"
#define MAX_INPUT_SZ 8
struct test_read_varint
{
/* Input: */
unsigned char input[MAX_INPUT_SZ];
size_t in_sz;
/* Output: */
int rv;
uint64_t val;
};
static const struct test_read_varint read_tests[] =
{
{
.input = "\x25",
.in_sz = 0,
.rv = -1,
},
{
.input = "\x25",
.in_sz = 2,
.rv = 1,
.val = 0x25,
},
{
.input = "\x40\x25",
.in_sz = 1,
.rv = -1,
},
{
.input = "\x40\x25",
.in_sz = 2,
.rv = 2,
.val = 0x25,
},
{
.input = "\x9d\x7f\x3e\x7d",
.in_sz = 2,
.rv = -1,
},
{
.input = "\x9d\x7f\x3e\x7d",
.in_sz = 4,
.rv = 4,
.val = 494878333,
},
{
.input = "\xc2\x19\x7c\x5e\xff\x14\xe8\x8c",
.in_sz = 7,
.rv = -1,
},
{
.input = "\xc2\x19\x7c\x5e\xff\x14\xe8\x8c",
.in_sz = 8,
.rv = 8,
.val = 151288809941952652ull,
},
};
int
main (void)
{
const struct test_read_varint *test;
const struct test_read_varint *const end
= read_tests + sizeof(read_tests) / sizeof(read_tests[0]);
size_t input_sz, avail;
struct varint_read_state state;
const unsigned char *p, *endp;
int s;
for (test = read_tests; test < end; ++test)
{
uint64_t val;
const int rv = vint_read(test->input, test->input + test->in_sz, &val);
assert(rv == test->rv);
if (test->rv > 0)
assert(val == test->val);
/* Test non-blocking read */
for (input_sz = MAX_INPUT_SZ; input_sz > 0; --input_sz)
{
state.pos = 0;
p = test->input;
endp = p + test->in_sz;
while (p < endp)
{
avail = (uintptr_t) (endp - p);
if (avail > input_sz)
avail = input_sz;
s = lsquic_varint_read_nb(&p, p + avail, &state);
if (0 == s)
{
assert(state.val == test->val);
assert(p <= endp);
break;
}
else if (p == endp)
{
assert(test->rv == -1);
break;
}
else
{
assert(p < endp);
}
}
}
}
return 0;
}