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/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
/**
* See aws/testing/compression/huffman.h for docs.
*/
#define AWS_UNSTABLE_TESTING_API
#include <aws/compression/private/huffman_testing.h>
#include <aws/common/byte_buf.h>
#include <aws/common/common.h>
int huffman_test_transitive(
struct aws_huffman_symbol_coder *coder,
const char *input,
size_t size,
size_t encoded_size,
const char **error_string) {
struct aws_huffman_encoder encoder;
aws_huffman_encoder_init(&encoder, coder);
struct aws_huffman_decoder decoder;
aws_huffman_decoder_init(&decoder, coder);
const size_t intermediate_buffer_size = size * 2;
AWS_VARIABLE_LENGTH_ARRAY(uint8_t, intermediate_buffer, intermediate_buffer_size);
memset(intermediate_buffer, 0, intermediate_buffer_size);
AWS_VARIABLE_LENGTH_ARRAY(char, output_buffer, size);
memset(output_buffer, 0, size);
struct aws_byte_cursor to_encode = aws_byte_cursor_from_array((uint8_t *)input, size);
struct aws_byte_buf intermediate_buf = aws_byte_buf_from_empty_array(intermediate_buffer, intermediate_buffer_size);
struct aws_byte_buf output_buf = aws_byte_buf_from_empty_array(output_buffer, size);
int result = aws_huffman_encode(&encoder, &to_encode, &intermediate_buf);
if (result != AWS_OP_SUCCESS) {
*error_string = "aws_huffman_encode failed";
return AWS_OP_ERR;
}
if (to_encode.len != 0) {
*error_string = "not all data encoded";
return AWS_OP_ERR;
}
if (encoded_size && intermediate_buf.len != encoded_size) {
*error_string = "encoded length is incorrect";
return AWS_OP_ERR;
}
struct aws_byte_cursor intermediate_cur = aws_byte_cursor_from_buf(&intermediate_buf);
result = aws_huffman_decode(&decoder, &intermediate_cur, &output_buf);
if (result != AWS_OP_SUCCESS) {
*error_string = "aws_huffman_decode failed";
return AWS_OP_ERR;
}
if (intermediate_cur.len != 0) {
*error_string = "not all encoded data was decoded";
return AWS_OP_ERR;
}
if (output_buf.len != size) {
*error_string = "decode output size incorrect";
return AWS_OP_ERR;
}
if (memcmp(input, output_buffer, size) != 0) {
*error_string = "decoded data does not match input data";
return AWS_OP_ERR;
}
return AWS_OP_SUCCESS;
}
int huffman_test_transitive_chunked(
struct aws_huffman_symbol_coder *coder,
const char *input,
size_t size,
size_t encoded_size,
size_t output_chunk_size,
const char **error_string) {
struct aws_huffman_encoder encoder;
aws_huffman_encoder_init(&encoder, coder);
struct aws_huffman_decoder decoder;
aws_huffman_decoder_init(&decoder, coder);
const size_t intermediate_buffer_size = size * 2;
AWS_VARIABLE_LENGTH_ARRAY(uint8_t, intermediate_buffer, intermediate_buffer_size);
memset(intermediate_buffer, 0, intermediate_buffer_size);
AWS_VARIABLE_LENGTH_ARRAY(char, output_buffer, size);
memset(output_buffer, 0, size);
struct aws_byte_cursor to_encode = aws_byte_cursor_from_array(input, size);
struct aws_byte_buf intermediate_buf = aws_byte_buf_from_empty_array(intermediate_buffer, (size_t)-1);
intermediate_buf.capacity = 0;
struct aws_byte_buf output_buf = aws_byte_buf_from_empty_array(output_buffer, (size_t)-1);
output_buf.capacity = 0;
int result = AWS_OP_SUCCESS;
{
do {
const size_t previous_intermediate_len = intermediate_buf.len;
intermediate_buf.capacity += output_chunk_size;
result = aws_huffman_encode(&encoder, &to_encode, &intermediate_buf);
if (intermediate_buf.len == previous_intermediate_len) {
*error_string = "encode didn't write any data";
return AWS_OP_ERR;
}
if (result != AWS_OP_SUCCESS && aws_last_error() != AWS_ERROR_SHORT_BUFFER) {
*error_string = "encode returned wrong error code";
return AWS_OP_ERR;
}
} while (result != AWS_OP_SUCCESS);
}
if (result != AWS_OP_SUCCESS) {
*error_string = "aws_huffman_encode failed";
return AWS_OP_ERR;
}
if (intermediate_buf.len > intermediate_buffer_size) {
*error_string = "too much data encoded";
return AWS_OP_ERR;
}
if (encoded_size && intermediate_buf.len != encoded_size) {
*error_string = "encoded length is incorrect";
return AWS_OP_ERR;
}
struct aws_byte_cursor intermediate_cur = aws_byte_cursor_from_buf(&intermediate_buf);
{
do {
const size_t previous_output_len = output_buf.len;
output_buf.capacity += output_chunk_size;
if (output_buf.capacity > size) {
output_buf.capacity = size;
}
result = aws_huffman_decode(&decoder, &intermediate_cur, &output_buf);
if (output_buf.len == previous_output_len) {
*error_string = "decode didn't write any data";
return AWS_OP_ERR;
}
if (result != AWS_OP_SUCCESS && aws_last_error() != AWS_ERROR_SHORT_BUFFER) {
*error_string = "decode returned wrong error code";
return AWS_OP_ERR;
}
} while (result != AWS_OP_SUCCESS);
}
if (result != AWS_OP_SUCCESS) {
*error_string = "aws_huffman_decode failed";
return AWS_OP_ERR;
}
if (output_buf.len != size) {
*error_string = "decode output size incorrect";
return AWS_OP_ERR;
}
if (memcmp(input, output_buffer, size) != 0) {
*error_string = "decoded data does not match input data";
return AWS_OP_ERR;
}
return AWS_OP_SUCCESS;
}
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