310 lines
9.4 KiB
C
310 lines
9.4 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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/// \file test_vli.c
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/// \brief Tests liblzma vli functions
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//
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// Author: Jia Tan
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//
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// This file has been put into the public domain.
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// You can do whatever you want with this file.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "tests.h"
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// Pre-encoded VLI values for testing
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// VLI can have between 1 and 9 bytes when encoded
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// They are encoded little endian where all but the last
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// byte must have the leading 1 bit set
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static const uint8_t one_byte[1] = {0x25};
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static const lzma_vli one_byte_value = 37;
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static const uint8_t two_bytes[2] = {0x80, 0x56};
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static const lzma_vli two_byte_value = 11008;
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static const uint8_t three_bytes[3] = {0x99, 0x92, 0x20};
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static const lzma_vli three_byte_value = 526617;
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static const uint8_t four_bytes[4] = {0x97, 0x83, 0x94, 0x47};
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static const lzma_vli four_byte_value = 149225879;
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static const uint8_t five_bytes[5] = {0xA6, 0x92, 0x88, 0x89, 0x32};
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static const lzma_vli five_byte_value = 13440780582;
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static const uint8_t six_bytes[6] = {0xA9, 0x84, 0x99, 0x82, 0x94, 0x12};
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static const lzma_vli six_byte_value = 623848604201;
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static const uint8_t seven_bytes[7] = {0x90, 0x80, 0x90, 0x80, 0x90, 0x80,
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0x79};
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static const lzma_vli seven_byte_value = 532167923073040;
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static const uint8_t eight_bytes[8] = {0x91, 0x87, 0xF2, 0xB2, 0xC2, 0xD2,
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0x93, 0x63};
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static const lzma_vli eight_byte_value = 55818443594433425;
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static const uint8_t nine_bytes[9] = {0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1,
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0xE1, 0xF1, 0x1};
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static const lzma_vli nine_byte_value = 136100349976529025;
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static void
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test_lzma_vli_size(void)
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{
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// First test invalid VLI values (should return 0)
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// VLI UNKNOWN is an invalid VLI
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assert_uint_eq(lzma_vli_size(LZMA_VLI_UNKNOWN), 0);
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// Loop over a few VLI values just over the maximum
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for (uint64_t i = LZMA_VLI_MAX + 1; i < LZMA_VLI_MAX + 10; i++)
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assert_uint_eq(lzma_vli_size(i), 0);
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// Number should increment every seven set bits
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lzma_vli vli = 1;
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for (uint32_t i = 1; i < LZMA_VLI_BYTES_MAX; i++, vli <<= 7) {
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// Test the base value and a few others around it
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assert_uint_eq(lzma_vli_size(vli), i);
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assert_uint_eq(lzma_vli_size(vli * 2), i);
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assert_uint_eq(lzma_vli_size(vli + 10), i);
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assert_uint_eq(lzma_vli_size(vli * 3 + 39), i);
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}
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}
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// Helper function for test_lzma_vli_encode
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// Encodes an input VLI and compares against a pre-computed value
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static void
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encode_single_call_mode(lzma_vli input, const uint8_t *expected,
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uint32_t expected_len)
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{
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uint8_t out[LZMA_VLI_BYTES_MAX];
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size_t out_pos = 0;
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assert_lzma_ret(lzma_vli_encode(input, NULL, out, &out_pos,
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expected_len), LZMA_OK);
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assert_uint_eq(out_pos, expected_len);
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assert_array_eq(out, expected, expected_len);
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}
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// Helper function for test_lzma_vli_encode
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// Encodes an input VLI one byte at a time with the multi call
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// method. Then compares agaist a pre-computed value
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static void
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encode_multi_call_mode(lzma_vli input, const uint8_t *expected,
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uint32_t expected_len)
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{
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uint8_t out[LZMA_VLI_BYTES_MAX];
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size_t out_pos = 0;
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size_t vli_pos = 0;
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for (uint32_t i = 1; i < expected_len; i++) {
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assert_lzma_ret(lzma_vli_encode(input, &vli_pos, out,
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&out_pos, i), LZMA_OK);
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assert_uint_eq(out_pos, i);
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assert_uint_eq(vli_pos, i);
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}
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assert_lzma_ret(lzma_vli_encode(input, &vli_pos, out, &out_pos,
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expected_len), LZMA_STREAM_END);
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assert_uint_eq(out_pos, expected_len);
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assert_uint_eq(vli_pos, expected_len);
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assert_array_eq(out, expected, expected_len);
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}
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static void
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test_lzma_vli_encode(void)
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{
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size_t vli_pos = 0;
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uint8_t out[LZMA_VLI_BYTES_MAX];
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uint8_t zeros[LZMA_VLI_BYTES_MAX];
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memzero(out, LZMA_VLI_BYTES_MAX);
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memzero(zeros, LZMA_VLI_BYTES_MAX);
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size_t out_pos = 0;
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// First test invalid input parameters
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// VLI invalid
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assert_lzma_ret(lzma_vli_encode(LZMA_VLI_UNKNOWN, &vli_pos, out,
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&out_pos, sizeof(out)), LZMA_PROG_ERROR);
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// Failure should not change params
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assert_uint_eq(vli_pos, 0);
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assert_uint_eq(out_pos, 0);
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assert_array_eq(out, zeros, LZMA_VLI_BYTES_MAX);
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assert_lzma_ret(lzma_vli_encode(LZMA_VLI_MAX + 1, &vli_pos, out,
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&out_pos, sizeof(out)), LZMA_PROG_ERROR);
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assert_uint_eq(vli_pos, 0);
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assert_uint_eq(out_pos, 0);
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assert_array_eq(out, zeros, LZMA_VLI_BYTES_MAX);
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// 0 output size
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assert_lzma_ret(lzma_vli_encode(one_byte_value, &vli_pos, out,
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&out_pos, 0), LZMA_BUF_ERROR);
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assert_uint_eq(vli_pos, 0);
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assert_uint_eq(out_pos, 0);
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assert_array_eq(out, zeros, LZMA_VLI_BYTES_MAX);
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// Size of VLI does not fit in buffer
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size_t phony_out_pos = 3;
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assert_lzma_ret(lzma_vli_encode(one_byte_value, NULL, out,
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&phony_out_pos, 2), LZMA_PROG_ERROR);
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assert_lzma_ret(lzma_vli_encode(LZMA_VLI_MAX / 2, NULL, out,
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&out_pos, 2), LZMA_PROG_ERROR);
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// Test single-call mode (using vli_pos as NULL)
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encode_single_call_mode(one_byte_value, one_byte,
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sizeof(one_byte));
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encode_single_call_mode(two_byte_value, two_bytes,
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sizeof(two_bytes));
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encode_single_call_mode(three_byte_value, three_bytes,
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sizeof(three_bytes));
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encode_single_call_mode(four_byte_value, four_bytes,
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sizeof(four_bytes));
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encode_single_call_mode(five_byte_value, five_bytes,
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sizeof(five_bytes));
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encode_single_call_mode(six_byte_value, six_bytes,
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sizeof(six_bytes));
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encode_single_call_mode(seven_byte_value, seven_bytes,
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sizeof(seven_bytes));
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encode_single_call_mode(eight_byte_value, eight_bytes,
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sizeof(eight_bytes));
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encode_single_call_mode(nine_byte_value, nine_bytes,
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sizeof(nine_bytes));
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// Test multi-call mode
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encode_multi_call_mode(one_byte_value, one_byte,
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sizeof(one_byte));
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encode_multi_call_mode(two_byte_value, two_bytes,
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sizeof(two_bytes));
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encode_multi_call_mode(three_byte_value, three_bytes,
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sizeof(three_bytes));
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encode_multi_call_mode(four_byte_value, four_bytes,
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sizeof(four_bytes));
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encode_multi_call_mode(five_byte_value, five_bytes,
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sizeof(five_bytes));
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encode_multi_call_mode(six_byte_value, six_bytes,
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sizeof(six_bytes));
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encode_multi_call_mode(seven_byte_value, seven_bytes,
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sizeof(seven_bytes));
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encode_multi_call_mode(eight_byte_value, eight_bytes,
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sizeof(eight_bytes));
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encode_multi_call_mode(nine_byte_value, nine_bytes,
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sizeof(nine_bytes));
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}
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static void
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decode_single_call_mode(const uint8_t *input, uint32_t input_len,
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lzma_vli expected)
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{
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lzma_vli out = 0;
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size_t in_pos = 0;
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assert_lzma_ret(lzma_vli_decode(&out, NULL, input, &in_pos,
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input_len), LZMA_OK);
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assert_uint_eq(in_pos, input_len);
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assert_uint_eq(out, expected);
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}
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static void
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decode_multi_call_mode(const uint8_t *input, uint32_t input_len,
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lzma_vli expected)
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{
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lzma_vli out = 0;
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size_t in_pos = 0;
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size_t vli_pos = 0;
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for (uint32_t i = 1; i < input_len; i++) {
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assert_lzma_ret(lzma_vli_decode(&out, &vli_pos, input,
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&in_pos, i), LZMA_OK);
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assert_uint_eq(in_pos, i);
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assert_uint_eq(vli_pos, i);
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}
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assert_lzma_ret(lzma_vli_decode(&out, &vli_pos, input, &in_pos,
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input_len), LZMA_STREAM_END);
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assert_uint_eq(in_pos, input_len);
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assert_uint_eq(vli_pos, input_len);
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assert_uint_eq(out, expected);
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}
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static void
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test_lzma_vli_decode(void)
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{
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lzma_vli out = 0;
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size_t in_pos = 0;
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// First test invalid input params
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// 0 in_size
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assert_lzma_ret(lzma_vli_decode(&out, NULL, one_byte, &in_pos, 0),
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LZMA_DATA_ERROR);
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assert_uint_eq(out, 0);
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assert_uint_eq(in_pos, 0);
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// VLI encoded is invalid (last digit has leading 1 set)
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uint8_t invalid_vli[3] = {0x80, 0x80, 0x80};
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assert_lzma_ret(lzma_vli_decode(&out, NULL, invalid_vli, &in_pos,
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sizeof(invalid_vli)), LZMA_DATA_ERROR);
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// Bad vli_pos
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size_t vli_pos = LZMA_VLI_BYTES_MAX;
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assert_lzma_ret(lzma_vli_decode(&out, &vli_pos, invalid_vli, &in_pos,
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sizeof(invalid_vli)), LZMA_PROG_ERROR);
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// Bad in_pos
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in_pos = sizeof(invalid_vli);
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assert_lzma_ret(lzma_vli_decode(&out, &in_pos, invalid_vli, &in_pos,
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sizeof(invalid_vli)), LZMA_BUF_ERROR);
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// Test single call mode
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decode_single_call_mode(one_byte, sizeof(one_byte),
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one_byte_value);
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decode_single_call_mode(two_bytes, sizeof(two_bytes),
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two_byte_value);
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decode_single_call_mode(three_bytes, sizeof(three_bytes),
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three_byte_value);
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decode_single_call_mode(four_bytes, sizeof(four_bytes),
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four_byte_value);
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decode_single_call_mode(five_bytes, sizeof(five_bytes),
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five_byte_value);
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decode_single_call_mode(six_bytes, sizeof(six_bytes),
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six_byte_value);
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decode_single_call_mode(seven_bytes, sizeof(seven_bytes),
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seven_byte_value);
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decode_single_call_mode(eight_bytes, sizeof(eight_bytes),
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eight_byte_value);
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decode_single_call_mode(nine_bytes, sizeof(nine_bytes),
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nine_byte_value);
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// Test multi call mode
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decode_multi_call_mode(one_byte, sizeof(one_byte),
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one_byte_value);
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decode_multi_call_mode(two_bytes, sizeof(two_bytes),
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two_byte_value);
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decode_multi_call_mode(three_bytes, sizeof(three_bytes),
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three_byte_value);
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decode_multi_call_mode(four_bytes, sizeof(four_bytes),
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four_byte_value);
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decode_multi_call_mode(five_bytes, sizeof(five_bytes),
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five_byte_value);
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decode_multi_call_mode(six_bytes, sizeof(six_bytes),
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six_byte_value);
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decode_multi_call_mode(seven_bytes, sizeof(seven_bytes),
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seven_byte_value);
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decode_multi_call_mode(eight_bytes, sizeof(eight_bytes),
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eight_byte_value);
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decode_multi_call_mode(nine_bytes, sizeof(nine_bytes),
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nine_byte_value);
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}
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extern int
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main(int argc, char **argv)
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{
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tuktest_start(argc, argv);
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tuktest_run(test_lzma_vli_size);
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tuktest_run(test_lzma_vli_encode);
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tuktest_run(test_lzma_vli_decode);
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return tuktest_end();
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}
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