isa-l/igzip/igzip_rand_test.c

/**********************************************************************
  Copyright(c) 2011-2016 Intel Corporation All rights reserved.

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  modification, are permitted provided that the following conditions
  are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in
      the documentation and/or other materials provided with the
      distribution.
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      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "igzip_lib.h"
#include "checksum_test_ref.h"
#include "inflate_std_vects.h"
#include <math.h>
#include "test.h"

#ifndef RANDOMS
# define RANDOMS   0x40
#endif
#ifndef TEST_SEED
# define TEST_SEED 0x1234
#endif

#define MAX_BITS_COUNT 20
#define MIN_BITS_COUNT 8

#define IBUF_SIZE  (1024*1024)

#define PAGE_SIZE 4*1024

#define str1 "Short test string"
#define str2 "one two three four five six seven eight nine ten eleven twelve " \
		 "thirteen fourteen fifteen sixteen"

#define TYPE0_HDR_SIZE 5	/* Size of a type 0 blocks header in bytes */
#define TYPE0_MAX_SIZE 65535	/* Max length of a type 0 block in bytes (excludes the header) */

#define MAX_LOOPS 20
/* Defines for the possible error conditions */
enum IGZIP_TEST_ERROR_CODES {
	IGZIP_COMP_OK,

	MALLOC_FAILED,
	FILE_READ_FAILED,

	COMPRESS_INCORRECT_STATE,
	COMPRESS_INPUT_STREAM_INTEGRITY_ERROR,
	COMPRESS_OUTPUT_STREAM_INTEGRITY_ERROR,
	COMPRESS_END_OF_STREAM_NOT_SET,
	COMPRESS_ALL_INPUT_FAIL,
	COMPRESS_OUT_BUFFER_OVERFLOW,
	COMPRESS_LOOP_COUNT_OVERFLOW,
	COMPRESS_GENERAL_ERROR,

	INFLATE_END_OF_INPUT,
	INFLATE_INVALID_BLOCK_HEADER,
	INFLATE_INVALID_SYMBOL,
	INFLATE_OUT_BUFFER_OVERFLOW,
	INFLATE_LEFTOVER_INPUT,
	INFLATE_INCORRECT_OUTPUT_SIZE,
	INFLATE_INVALID_LOOK_BACK_DISTANCE,
	INFLATE_INPUT_STREAM_INTEGRITY_ERROR,
	INFLATE_OUTPUT_STREAM_INTEGRITY_ERROR,
	INVALID_GZIP_HEADER,
	INCORRECT_GZIP_TRAILER,
	INVALID_ZLIB_HEADER,
	INCORRECT_ZLIB_TRAILER,

	INFLATE_GENERAL_ERROR,

	INVALID_FLUSH_ERROR,

	OVERFLOW_TEST_ERROR,
	RESULT_ERROR
};

static const int hdr_bytes = 300;

static const uint8_t gzip_hdr[10] = {
	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0xff
};

static const uint8_t zlib_hdr[2] = {
	0x78, 0x01
};

static const uint32_t gzip_hdr_bytes = 10;
static const uint32_t zlib_hdr_bytes = 2;
static const uint32_t gzip_trl_bytes = 8;
static const uint32_t zlib_trl_bytes = 4;
static const int gzip_extra_bytes = 18;	/* gzip_hdr_bytes + gzip_trl_bytes */
static const int zlib_extra_bytes = 6;	/* zlib_hdr_bytes + zlib_trl_bytes */

int inflate_type = 0;

struct isal_hufftables *hufftables = NULL;

#define HISTORY_SIZE 32*1024
#define MIN_LENGTH 3
#define MIN_DIST 1

/* Create random compressible data. This is achieved by randomly choosing a
 * random character, or to repeat previous data in the stream for a random
 * length and look back distance. The probability of a random character or a
 * repeat being chosen is semi-randomly chosen by setting max_repeat_data to be
 * differing values */
void create_rand_repeat_data(uint8_t * data, int size)
{
	uint32_t next_data;
	uint8_t *data_start = data;
	uint32_t length, distance;
	uint32_t symbol_count = rand() % 255 + 1, swaps_left, tmp;
	uint32_t max_repeat_data = symbol_count;
	uint8_t symbols[256], *symbols_next, swap_val;

	/* An array of the powers of 2 (except the final element which is 0) */
	const uint32_t power_of_2_array[] = {
		0x00000001, 0x00000002, 0x00000004, 0x00000008,
		0x00000010, 0x00000020, 0x00000040, 0x00000080,
		0x00000100, 0x00000200, 0x00000400, 0x00000800,
		0x00001000, 0x00002000, 0x00004000, 0x00008000,
		0x00010000, 0x00020000, 0x00040000, 0x00080000,
		0x00100000, 0x00200000, 0x00400000, 0x00800000,
		0x01000000, 0x02000000, 0x04000000, 0x08000000,
		0x10000000, 0x20000000, 0x40000000, 0x00000000
	};

	uint32_t power = rand() % sizeof(power_of_2_array) / sizeof(uint32_t);

	if (symbol_count > 128) {
		memset(symbols, 1, sizeof(symbols));
		swap_val = 0;
		swaps_left = 256 - symbol_count;
	} else {
		memset(symbols, 0, sizeof(symbols));
		swap_val = 1;
		swaps_left = symbol_count;
	}

	while (swaps_left > 0) {
		tmp = rand() % 256;
		if (symbols[tmp] != swap_val) {
			symbols[tmp] = swap_val;
			swaps_left--;
		}
	}

	symbols_next = symbols;
	for (tmp = 0; tmp < 256; tmp++) {
		if (symbols[tmp]) {
			*symbols_next = tmp;
			symbols_next++;
		}
	}

	max_repeat_data += power_of_2_array[power];

	if (size-- > 0)
		*data++ = rand();

	while (size > 0) {
		next_data = rand() % max_repeat_data;
		if (next_data < symbol_count) {
			*data++ = symbols[next_data];
			size--;
		} else if (size < 3) {
			*data++ = symbols[rand() % symbol_count];
			size--;
		} else {
			length = (rand() % 256) + MIN_LENGTH;
			if (length > size)
				length = (rand() % (size - 2)) + MIN_LENGTH;

			distance = (rand() % HISTORY_SIZE) + MIN_DIST;
			if (distance > data - data_start)
				distance = (rand() % (data - data_start)) + MIN_DIST;

			size -= length;
			if (distance <= length) {
				while (length-- > 0) {
					*data = *(data - distance);
					data++;
				}
			} else
				memcpy(data, data - distance, length);
		}
	}
}

void create_rand_dict(uint8_t * dict, uint32_t dict_len, uint8_t * buf, uint32_t buf_len)
{
	uint32_t dict_chunk_size, buf_chunk_size;
	while (dict_len > 0) {
		dict_chunk_size = rand() % IGZIP_K;
		dict_chunk_size = (dict_len >= dict_chunk_size) ? dict_chunk_size : dict_len;

		buf_chunk_size = rand() % IGZIP_K;
		buf_chunk_size = (buf_len >= buf_chunk_size) ? buf_chunk_size : buf_len;

		if (rand() % 3 == 0 && buf_len >= dict_len)
			memcpy(dict, buf, dict_chunk_size);
		else
			create_rand_repeat_data(dict, dict_chunk_size);

		dict_len -= dict_chunk_size;
		dict += dict_chunk_size;
		buf_len -= buf_chunk_size;
		buf += buf_chunk_size;
	}

}

int get_rand_data_length(void)
{
	int max_mask =
	    (1 << ((rand() % (MAX_BITS_COUNT - MIN_BITS_COUNT)) + MIN_BITS_COUNT)) - 1;
	return rand() & max_mask;
}

void print_error(int error_code)
{
	switch (error_code) {
	case IGZIP_COMP_OK:
		break;
	case MALLOC_FAILED:
		printf("error: failed to allocate memory\n");
		break;
	case FILE_READ_FAILED:
		printf("error: failed to read in file\n");
		break;
	case COMPRESS_INCORRECT_STATE:
		printf("error: incorrect stream internal state\n");
		break;
	case COMPRESS_INPUT_STREAM_INTEGRITY_ERROR:
		printf("error: inconsistent stream input buffer\n");
		break;
	case COMPRESS_OUTPUT_STREAM_INTEGRITY_ERROR:
		printf("error: inconsistent stream output buffer\n");
		break;
	case COMPRESS_END_OF_STREAM_NOT_SET:
		printf("error: end of stream not set\n");
		break;
	case COMPRESS_ALL_INPUT_FAIL:
		printf("error: not all input data compressed\n");
		break;
	case COMPRESS_OUT_BUFFER_OVERFLOW:
		printf("error: output buffer overflow while compressing data\n");
		break;
	case COMPRESS_GENERAL_ERROR:
		printf("error: compression failed\n");
		break;
	case INFLATE_END_OF_INPUT:
		printf("error: did not decompress all input\n");
		break;
	case INFLATE_INVALID_BLOCK_HEADER:
		printf("error: invalid header\n");
		break;
	case INFLATE_INVALID_SYMBOL:
		printf("error: invalid symbol found when decompressing input\n");
		break;
	case INFLATE_OUT_BUFFER_OVERFLOW:
		printf("error: output buffer overflow while decompressing data\n");
		break;
	case INFLATE_GENERAL_ERROR:
		printf("error: decompression failed\n");
		break;
	case INFLATE_LEFTOVER_INPUT:
		printf("error: the trailer of igzip output contains junk\n");
		break;
	case INFLATE_INCORRECT_OUTPUT_SIZE:
		printf("error: incorrect amount of data was decompressed\n");
		break;
	case INFLATE_INVALID_LOOK_BACK_DISTANCE:
		printf("error: invalid look back distance found while decompressing\n");
		break;
	case INFLATE_INPUT_STREAM_INTEGRITY_ERROR:
		printf("error: inconsistent input buffer\n");
		break;
	case INFLATE_OUTPUT_STREAM_INTEGRITY_ERROR:
		printf("error: inconsistent output buffer\n");
		break;
	case INVALID_GZIP_HEADER:
		printf("error: incorrect gzip header found when inflating data\n");
		break;
	case INCORRECT_GZIP_TRAILER:
		printf("error: incorrect gzip trailer found when inflating data\n");
		break;
	case INVALID_ZLIB_HEADER:
		printf("error: incorrect zlib header found when inflating data\n");
		break;
	case INCORRECT_ZLIB_TRAILER:
		printf("error: incorrect zlib trailer found when inflating data\n");
		break;
	case INVALID_FLUSH_ERROR:
		printf("error: invalid flush did not cause compression to error\n");
		break;
	case RESULT_ERROR:
		printf("error: decompressed data is not the same as the compressed data\n");
		break;
	case OVERFLOW_TEST_ERROR:
		printf("error: overflow undetected\n");
		break;
	default:
		printf("error: unknown error code\n");
	}
}

void print_uint8_t(uint8_t * array, uint64_t length)
{
	const int line_size = 16;
	int i;

	printf("Length = %lu", length);
	for (i = 0; i < length; i++) {
		if ((i % line_size) == 0)
			printf("\n0x%08x\t", i);
		else
			printf(" ");
		printf("0x%02x,", array[i]);
	}
	printf("\n");
}

uint32_t check_gzip_header(uint8_t * z_buf)
{
	/* These values are defined in RFC 1952 page 4 */
	const uint8_t ID1 = 0x1f, ID2 = 0x8b, CM = 0x08, FLG = 0;
	uint32_t ret = 0;
	int i;
	/* Verify that the gzip header is the one used in hufftables_c.c */
	for (i = 0; i < gzip_hdr_bytes; i++)
		if (z_buf[i] != gzip_hdr[i])
			ret = INVALID_GZIP_HEADER;

	/* Verify that the gzip header is a valid gzip header */
	if (*z_buf++ != ID1)
		ret = INVALID_GZIP_HEADER;

	if (*z_buf++ != ID2)
		ret = INVALID_GZIP_HEADER;

	/* Verfiy compression method is Deflate */
	if (*z_buf++ != CM)
		ret = INVALID_GZIP_HEADER;

	/* The following comparison is specific to how gzip headers are written in igzip */
	/* Verify no extra flags are set */
	if (*z_buf != FLG)
		ret = INVALID_GZIP_HEADER;

	/* The last 6 bytes in the gzip header do not contain any information
	 * important to decomrpessing the data */

	return ret;
}

uint32_t check_zlib_header(uint8_t * z_buf)
{
	/* These values are defined in RFC 1952 page 4 */
	uint32_t ret = 0;
	int i;
	/* Verify that the gzip header is the one used in hufftables_c.c */
	for (i = 0; i < zlib_hdr_bytes; i++)
		if (z_buf[i] != zlib_hdr[i])
			ret = INVALID_ZLIB_HEADER;
	return ret;
}

uint32_t check_gzip_trl(uint64_t gzip_trl, uint32_t inflate_crc, uint8_t * uncompress_buf,
			uint32_t uncompress_len)
{
	uint64_t trl, ret = 0;
	uint32_t crc;

	crc = crc32_gzip_refl_ref(0, uncompress_buf, uncompress_len);
	trl = ((uint64_t) uncompress_len << 32) | crc;

	if (crc != inflate_crc || trl != gzip_trl)
		ret = INCORRECT_GZIP_TRAILER;

	return ret;
}

uint32_t check_zlib_trl(uint32_t zlib_trl, uint32_t inflate_adler, uint8_t * uncompress_buf,
			uint32_t uncompress_len)
{
	uint32_t trl, ret = 0;
	uint32_t adler;

	adler = adler_ref(1, uncompress_buf, uncompress_len);

	trl =
	    (adler >> 24) | ((adler >> 8) & 0xFF00) | (adler << 24) | ((adler & 0xFF00) << 8);

	if (adler != inflate_adler || trl != zlib_trl) {
		ret = INCORRECT_ZLIB_TRAILER;
	}

	return ret;
}

int inflate_stateless_pass(uint8_t * compress_buf, uint64_t compress_len,
			   uint8_t * uncompress_buf, uint32_t * uncompress_len,
			   uint32_t gzip_flag)
{
	struct inflate_state state;
	int ret = 0;

	state.next_in = compress_buf;
	state.avail_in = compress_len;
	state.next_out = uncompress_buf;
	state.avail_out = *uncompress_len;
	state.crc_flag = gzip_flag;

	ret = isal_inflate_stateless(&state);

	*uncompress_len = state.total_out;

	if (gzip_flag) {
		if (gzip_flag == IGZIP_GZIP || gzip_flag == IGZIP_GZIP_NO_HDR) {
			if (!ret)
				ret =
				    check_gzip_trl(*(uint64_t *) state.next_in, state.crc,
						   uncompress_buf, *uncompress_len);
			state.avail_in -= gzip_trl_bytes;
		} else if (gzip_flag == IGZIP_ZLIB || gzip_flag == IGZIP_ZLIB_NO_HDR) {
			if (!ret)
				ret =
				    check_zlib_trl(*(uint32_t *) state.next_in, state.crc,
						   uncompress_buf, *uncompress_len);
			state.avail_in -= zlib_trl_bytes;

		}

	}

	if (ret == 0 && state.avail_in != 0)
		ret = INFLATE_LEFTOVER_INPUT;

	return ret;
}

/* Check if that the state of the data stream is consistent */
int inflate_state_valid_check(struct inflate_state *state, uint8_t * in_buf, uint32_t in_size,
			      uint8_t * out_buf, uint32_t out_size, uint32_t in_processed,
			      uint32_t out_processed, uint32_t data_size)
{
	uint32_t in_buffer_size, total_out, out_buffer_size;

	in_buffer_size = (in_size == 0) ? 0 : state->next_in - in_buf + state->avail_in;

	/* Check for a consistent amount of data processed */
	if (in_buffer_size != in_size)
		return INFLATE_INPUT_STREAM_INTEGRITY_ERROR;

	total_out =
	    (out_size == 0) ? out_processed : out_processed + (state->next_out - out_buf);
	out_buffer_size = (out_size == 0) ? 0 : state->next_out - out_buf + state->avail_out;

	/* Check for a consistent amount of data compressed */
	if (total_out != state->total_out || out_buffer_size != out_size)
		return INFLATE_OUTPUT_STREAM_INTEGRITY_ERROR;

	return 0;
}

/* Performs compression with checks to discover and verify the state of the
 * stream
 * state: inflate data structure which has been initialized to use
 * in_buf and out_buf as the buffers
 * compress_len: size of all input compressed data
 * data_size: size of all available output buffers
 * in_buf: next buffer of data to be inflated
 * in_size: size of in_buf
 * out_buf: next out put buffer where data is stored
 * out_size: size of out_buf
 * in_processed: the amount of input data which has been loaded into buffers
 * to be inflated, this includes the data in in_buf
 * out_processed: the amount of output data which has been decompressed and stored,
 * this does not include the data in the current out_buf
*/
int isal_inflate_with_checks(struct inflate_state *state, uint32_t compress_len,
			     uint32_t data_size, uint8_t * in_buf, uint32_t in_size,
			     uint32_t in_processed, uint8_t * out_buf, uint32_t out_size,
			     uint32_t out_processed)
{
	int ret, stream_check = 0;

	ret = isal_inflate(state);

	/* Verify the stream is in a valid state when no errors occured */
	if (ret >= 0) {
		stream_check =
		    inflate_state_valid_check(state, in_buf, in_size, out_buf, out_size,
					      in_processed, out_processed, data_size);
	}

	if (stream_check != 0)
		return stream_check;

	return ret;

}

int inflate_multi_pass(uint8_t * compress_buf, uint64_t compress_len,
		       uint8_t * uncompress_buf, uint32_t * uncompress_len, uint32_t gzip_flag,
		       uint8_t * dict, uint32_t dict_len)
{
	struct inflate_state *state = NULL;
	int ret = 0;
	uint8_t *comp_tmp = NULL, *uncomp_tmp = NULL;
	uint32_t comp_tmp_size = 0, uncomp_tmp_size = 0;
	uint32_t comp_processed = 0, uncomp_processed = 0;
	int32_t read_in_old = 0;
	uint32_t reset_test_flag = 0;

	state = malloc(sizeof(struct inflate_state));
	if (state == NULL) {
		printf("Failed to allocate memory\n");
		exit(0);
	}

	create_rand_repeat_data((uint8_t *) state, sizeof(state));
	isal_inflate_init(state);

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		create_rand_repeat_data((uint8_t *) state, sizeof(state));
	}

	state->next_in = NULL;
	state->next_out = NULL;
	state->avail_in = 0;
	state->avail_out = 0;
	state->crc_flag = gzip_flag;

	if (reset_test_flag)
		isal_inflate_reset(state);

	if (dict != NULL)
		isal_inflate_set_dict(state, dict, dict_len);

	if (gzip_flag == IGZIP_GZIP || gzip_flag == IGZIP_GZIP_NO_HDR)
		compress_len -= gzip_trl_bytes;
	else if (gzip_flag == IGZIP_ZLIB || gzip_flag == IGZIP_ZLIB_NO_HDR)
		compress_len -= zlib_trl_bytes;

	while (1) {
		if (state->avail_in == 0) {
			comp_tmp_size = rand() % (compress_len + 1);

			if (comp_tmp_size >= compress_len - comp_processed)
				comp_tmp_size = compress_len - comp_processed;

			if (comp_tmp_size != 0) {
				if (comp_tmp != NULL) {
					free(comp_tmp);
					comp_tmp = NULL;
				}

				comp_tmp = malloc(comp_tmp_size);

				if (comp_tmp == NULL) {
					printf("Failed to allocate memory\n");
					return MALLOC_FAILED;
				}

				memcpy(comp_tmp, compress_buf + comp_processed, comp_tmp_size);
				comp_processed += comp_tmp_size;

				state->next_in = comp_tmp;
				state->avail_in = comp_tmp_size;
			}
		}

		if (state->avail_out == 0) {
			/* Save uncompressed data into uncompress_buf */
			if (uncomp_tmp != NULL) {
				memcpy(uncompress_buf + uncomp_processed, uncomp_tmp,
				       uncomp_tmp_size);
				uncomp_processed += uncomp_tmp_size;
			}

			uncomp_tmp_size = rand() % (*uncompress_len + 1);

			/* Limit size of buffer to be smaller than maximum */
			if (uncomp_tmp_size > *uncompress_len - uncomp_processed)
				uncomp_tmp_size = *uncompress_len - uncomp_processed;

			if (uncomp_tmp_size != 0) {

				if (uncomp_tmp != NULL) {
					fflush(0);
					free(uncomp_tmp);
					uncomp_tmp = NULL;
				}

				uncomp_tmp = malloc(uncomp_tmp_size);
				if (uncomp_tmp == NULL) {
					printf("Failed to allocate memory\n");
					return MALLOC_FAILED;
				}

				state->avail_out = uncomp_tmp_size;
				state->next_out = uncomp_tmp;
			}
		}

		ret = isal_inflate_with_checks(state, compress_len, *uncompress_len, comp_tmp,
					       comp_tmp_size, comp_processed, uncomp_tmp,
					       uncomp_tmp_size, uncomp_processed);

		if (state->block_state == ISAL_BLOCK_FINISH || ret != 0) {
			memcpy(uncompress_buf + uncomp_processed, uncomp_tmp, uncomp_tmp_size);
			*uncompress_len = state->total_out;
			break;
		}

		if (*uncompress_len - uncomp_processed == 0 && state->avail_out == 0
		    && state->tmp_out_valid - state->tmp_out_processed > 0) {
			ret = ISAL_OUT_OVERFLOW;
			break;
		}

		if (compress_len - comp_processed == 0 && state->avail_in == 0
		    && (state->block_state != ISAL_BLOCK_INPUT_DONE)
		    && state->tmp_out_valid - state->tmp_out_processed == 0) {
			if (state->read_in_length == read_in_old) {
				ret = ISAL_END_INPUT;
				break;
			}
			read_in_old = state->read_in_length;
		}
	}

	if (gzip_flag) {
		if (!ret) {
			if (gzip_flag == IGZIP_GZIP || gzip_flag == IGZIP_GZIP_NO_HDR) {
				ret =
				    check_gzip_trl(*(uint64_t *) & compress_buf[compress_len],
						   state->crc, uncompress_buf,
						   *uncompress_len);
			} else if (gzip_flag == IGZIP_ZLIB || gzip_flag == IGZIP_ZLIB_NO_HDR) {
				ret =
				    check_zlib_trl(*(uint32_t *) & compress_buf[compress_len],
						   state->crc, uncompress_buf,
						   *uncompress_len);
			}
		}
	}
	if (ret == 0 && state->avail_in != 0)
		ret = INFLATE_LEFTOVER_INPUT;

	if (comp_tmp != NULL) {
		free(comp_tmp);
		comp_tmp = NULL;
	}

	if (uncomp_tmp != NULL) {
		free(uncomp_tmp);
		uncomp_tmp = NULL;
	}

	free(state);
	return ret;
}

/* Inflate the  compressed data and check that the decompressed data agrees with the input data */
int inflate_check(uint8_t * z_buf, int z_size, uint8_t * in_buf, int in_size,
		  uint32_t gzip_flag, uint8_t * dict, uint32_t dict_len)
{
	/* Test inflate with reference inflate */

	int ret = 0;
	uint32_t test_size = in_size;
	uint8_t *test_buf = NULL;
	int mem_result = 0;
	int gzip_hdr_result = 0, gzip_trl_result = 0;

	if (in_size > 0) {
		assert(in_buf != NULL);
		test_buf = malloc(test_size);
		if (test_buf == NULL)
			return MALLOC_FAILED;
	}

	if (test_buf != NULL)
		memset(test_buf, 0xff, test_size);

	if (gzip_flag == IGZIP_GZIP) {
		gzip_hdr_result = check_gzip_header(z_buf);
		z_buf += gzip_hdr_bytes;
		z_size -= gzip_hdr_bytes;
	} else if (gzip_flag == IGZIP_ZLIB) {
		gzip_hdr_result = check_zlib_header(z_buf);
		z_buf += zlib_hdr_bytes;
		z_size -= zlib_hdr_bytes;
	}

	if (inflate_type == 0 && dict == NULL) {
		ret = inflate_stateless_pass(z_buf, z_size, test_buf, &test_size, gzip_flag);
		inflate_type = 1;
	} else {
		ret =
		    inflate_multi_pass(z_buf, z_size, test_buf, &test_size, gzip_flag, dict,
				       dict_len);
		inflate_type = 0;
	}

	if (test_buf != NULL)
		mem_result = memcmp(in_buf, test_buf, in_size);

#ifdef VERBOSE
	int i;
	if (mem_result)
		for (i = 0; i < in_size; i++) {
			if (in_buf[i] != test_buf[i]) {
				printf
				    ("First incorrect data at 0x%x of 0x%x, 0x%x != 0x%x\n",
				     i, in_size, in_buf[i], test_buf[i]);
				break;
			}
		}
#endif

	if (test_buf != NULL)
		free(test_buf);
	switch (ret) {
	case 0:
		break;
	case ISAL_END_INPUT:
		return INFLATE_END_OF_INPUT;
		break;
	case ISAL_INVALID_BLOCK:
		return INFLATE_INVALID_BLOCK_HEADER;
		break;
	case ISAL_INVALID_SYMBOL:
		return INFLATE_INVALID_SYMBOL;
		break;
	case ISAL_OUT_OVERFLOW:
		return INFLATE_OUT_BUFFER_OVERFLOW;
		break;
	case ISAL_INVALID_LOOKBACK:
		return INFLATE_INVALID_LOOK_BACK_DISTANCE;
		break;
	case INFLATE_LEFTOVER_INPUT:
		return INFLATE_LEFTOVER_INPUT;
		break;
	case INCORRECT_GZIP_TRAILER:
		gzip_trl_result = INCORRECT_GZIP_TRAILER;
		break;
	case INCORRECT_ZLIB_TRAILER:
		gzip_trl_result = INCORRECT_ZLIB_TRAILER;
		break;
	case INFLATE_INPUT_STREAM_INTEGRITY_ERROR:
		return INFLATE_INPUT_STREAM_INTEGRITY_ERROR;
		break;
	case INFLATE_OUTPUT_STREAM_INTEGRITY_ERROR:
		return INFLATE_OUTPUT_STREAM_INTEGRITY_ERROR;
		break;
	default:
		return INFLATE_GENERAL_ERROR;
		break;
	}

	if (test_size != in_size)
		return INFLATE_INCORRECT_OUTPUT_SIZE;

	if (mem_result)
		return RESULT_ERROR;

	if (gzip_hdr_result == INVALID_GZIP_HEADER)
		return INVALID_GZIP_HEADER;

	else if (gzip_hdr_result == INVALID_ZLIB_HEADER)
		return INVALID_ZLIB_HEADER;

	if (gzip_trl_result == INCORRECT_GZIP_TRAILER)
		return INCORRECT_GZIP_TRAILER;

	else if (gzip_trl_result == INCORRECT_ZLIB_TRAILER)
		return INCORRECT_ZLIB_TRAILER;

	return 0;
}

/* Check if that the state of the data stream is consistent */
int stream_valid_check(struct isal_zstream *stream, uint8_t * in_buf, uint32_t in_size,
		       uint8_t * out_buf, uint32_t out_size, uint32_t in_processed,
		       uint32_t out_processed, uint32_t data_size)
{
	uint32_t total_in, in_buffer_size, total_out, out_buffer_size;

	total_in =
	    (in_size ==
	     0) ? in_processed : (in_processed - in_size) + (stream->next_in - in_buf);
	in_buffer_size = (in_size == 0) ? 0 : stream->next_in - in_buf + stream->avail_in;

	/* Check for a consistent amount of data processed */
	if (total_in != stream->total_in || in_buffer_size != in_size)
		return COMPRESS_INPUT_STREAM_INTEGRITY_ERROR;

	total_out =
	    (out_size == 0) ? out_processed : out_processed + (stream->next_out - out_buf);
	out_buffer_size = (out_size == 0) ? 0 : stream->next_out - out_buf + stream->avail_out;

	/* Check for a consistent amount of data compressed */
	if (total_out != stream->total_out || out_buffer_size != out_size) {
		return COMPRESS_OUTPUT_STREAM_INTEGRITY_ERROR;
	}

	return 0;
}

/* Performs compression with checks to discover and verify the state of the
 * stream
 * stream: compress data structure which has been initialized to use
 * in_buf and out_buf as the buffers
 * data_size: size of all input data
 * compressed_size: size of all available output buffers
 * in_buf: next buffer of data to be compressed
 * in_size: size of in_buf
 * out_buf: next out put buffer where data is stored
 * out_size: size of out_buf
 * in_processed: the amount of input data which has been loaded into buffers
 * to be compressed, this includes the data in in_buf
 * out_processed: the amount of output data which has been compressed and stored,
 * this does not include the data in the current out_buf
*/
int isal_deflate_with_checks(struct isal_zstream *stream, uint32_t data_size,
			     uint32_t compressed_size, uint8_t * in_buf, uint32_t in_size,
			     uint32_t in_processed, uint8_t * out_buf, uint32_t out_size,
			     uint32_t out_processed)
{
	int ret, stream_check;
	struct isal_zstate *state = &stream->internal_state;

#ifdef VERBOSE
	printf("Pre compression\n");
	printf
	    ("data_size       = 0x%05x, in_processed  = 0x%05x, in_size  = 0x%05x, avail_in  = 0x%05x, total_in  = 0x%05x\n",
	     data_size, in_processed, in_size, stream->avail_in, stream->total_in);
	printf
	    ("compressed_size = 0x%05x, out_processed = 0x%05x, out_size = 0x%05x, avail_out = 0x%05x, total_out = 0x%05x\n",
	     compressed_size, out_processed, out_size, stream->avail_out, stream->total_out);
#endif

	ret = isal_deflate(stream);

#ifdef VERBOSE
	printf("Post compression\n");
	printf
	    ("data_size       = 0x%05x, in_processed  = 0x%05x, in_size  = 0x%05x, avail_in  = 0x%05x, total_in  = 0x%05x\n",
	     data_size, in_processed, in_size, stream->avail_in, stream->total_in);
	printf
	    ("compressed_size = 0x%05x, out_processed = 0x%05x, out_size = 0x%05x, avail_out = 0x%05x, total_out = 0x%05x\n",
	     compressed_size, out_processed, out_size, stream->avail_out, stream->total_out);
	printf("\n\n");
#endif

	/* Verify the stream is in a valid state */
	stream_check = stream_valid_check(stream, in_buf, in_size, out_buf, out_size,
					  in_processed, out_processed, data_size);

	if (stream_check != 0)
		return stream_check;

	if (ret != IGZIP_COMP_OK)
		return COMPRESS_GENERAL_ERROR;

	/* Check if the compression is completed */
	if (state->state != ZSTATE_END)
		if (compressed_size - out_processed - (out_size - stream->avail_out) <= 0)
			return COMPRESS_OUT_BUFFER_OVERFLOW;

	return ret;

}

void set_random_hufftable(struct isal_zstream *stream)
{
	isal_deflate_set_hufftables(stream, hufftables, rand() % 4);
}

/* Compress the input data into the output buffer where the input buffer and
 * output buffer are randomly segmented to test state information for the
 * compression*/
int compress_multi_pass(uint8_t * data, uint32_t data_size, uint8_t * compressed_buf,
			uint32_t * compressed_size, uint32_t flush_type, uint32_t gzip_flag,
			uint32_t level, uint8_t * dict, uint32_t dict_len)
{
	int ret = IGZIP_COMP_OK;
	uint8_t *in_buf = NULL, *out_buf = NULL;
	uint32_t in_size = 0, out_size = 0;
	uint32_t in_processed = 0, out_processed = 0;
	struct isal_zstream stream;
	struct isal_zstate *state = &stream.internal_state;
	uint32_t loop_count = 0;
	uint32_t level_buf_size;
	uint8_t *level_buf = NULL;
	struct isal_hufftables *huff_tmp;
	uint32_t reset_test_flag = 0;
	uint8_t tmp_symbol;

#ifdef VERBOSE
	printf("Starting Compress Multi Pass\n");
#endif

	create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

	isal_deflate_init(&stream);

	if (state->state != ZSTATE_NEW_HDR)
		return COMPRESS_INCORRECT_STATE;

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		huff_tmp = stream.hufftables;
		create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

		/* Restore variables not necessarily set by user */
		stream.hufftables = huff_tmp;
		stream.end_of_stream = 0;
		stream.level = 0;
		stream.level_buf = NULL;
		stream.level_buf_size = 0;
	}

	stream.flush = flush_type;
	stream.end_of_stream = 0;

	/* These are set here to allow the loop to run correctly */
	stream.avail_in = 0;
	stream.avail_out = 0;
	stream.gzip_flag = gzip_flag;
	stream.level = level;

	if (level >= 1) {
		level_buf_size = rand() % IBUF_SIZE + ISAL_DEF_LVL1_MIN;
		level_buf = malloc(level_buf_size);
		create_rand_repeat_data(level_buf, level_buf_size);
		stream.level_buf = level_buf;
		stream.level_buf_size = level_buf_size;
	}

	if (reset_test_flag)
		isal_deflate_reset(&stream);

	if (dict != NULL)
		isal_deflate_set_dict(&stream, dict, dict_len);

	while (1) {
		loop_count++;

		/* Setup in buffer for next round of compression */
		if (stream.avail_in == 0) {
			if (flush_type == NO_FLUSH || state->state == ZSTATE_NEW_HDR) {
				/* Randomly choose size of the next out buffer */
				in_size = rand() % (data_size + 1);

				/* Limit size of buffer to be smaller than maximum */
				if (in_size >= data_size - in_processed) {
					in_size = data_size - in_processed;
					stream.end_of_stream = 1;
				}

				if (in_size != 0) {
					if (in_buf != NULL) {
						free(in_buf);
						in_buf = NULL;
					}

					in_buf = malloc(in_size);
					if (in_buf == NULL) {
						ret = MALLOC_FAILED;
						break;
					}
					memcpy(in_buf, data + in_processed, in_size);
					in_processed += in_size;

					stream.avail_in = in_size;
					stream.next_in = in_buf;
				}
			}
		} else {
			/* Randomly modify data after next in */
			if (rand() % 4 == 0) {

				tmp_symbol = rand();
#ifdef VERBOSE
				printf
				    ("Modifying data at index 0x%x from 0x%x to 0x%x before recalling isal_deflate\n",
				     in_processed - stream.avail_in,
				     data[in_processed - stream.avail_in], tmp_symbol);
#endif
				*stream.next_in = tmp_symbol;
				data[in_processed - stream.avail_in] = tmp_symbol;
			}
		}

		/* Setup out buffer for next round of compression */
		if (stream.avail_out == 0) {
			/* Save compressed data inot compressed_buf */
			if (out_buf != NULL) {
				memcpy(compressed_buf + out_processed, out_buf,
				       out_size - stream.avail_out);
				out_processed += out_size - stream.avail_out;
			}

			/* Randomly choose size of the next out buffer */
			out_size = rand() % (*compressed_size + 1);

			/* Limit size of buffer to be smaller than maximum */
			if (out_size > *compressed_size - out_processed)
				out_size = *compressed_size - out_processed;

			if (out_size != 0) {
				if (out_buf != NULL) {
					free(out_buf);
					out_buf = NULL;
				}

				out_buf = malloc(out_size);
				if (out_buf == NULL) {
					ret = MALLOC_FAILED;
					break;
				}

				stream.avail_out = out_size;
				stream.next_out = out_buf;
			}
		}

		if (state->state == ZSTATE_NEW_HDR)
			set_random_hufftable(&stream);

		ret =
		    isal_deflate_with_checks(&stream, data_size, *compressed_size, in_buf,
					     in_size, in_processed, out_buf, out_size,
					     out_processed);

		if (ret) {
			if (ret == COMPRESS_OUT_BUFFER_OVERFLOW
			    || ret == COMPRESS_INCORRECT_STATE)
				memcpy(compressed_buf + out_processed, out_buf, out_size);
			break;
		}

		/* Check if the compression is completed */
		if (state->state == ZSTATE_END) {
			memcpy(compressed_buf + out_processed, out_buf, out_size);
			*compressed_size = stream.total_out;
			break;
		}

	}

	if (level_buf != NULL)
		free(level_buf);
	if (in_buf != NULL)
		free(in_buf);
	if (out_buf != NULL)
		free(out_buf);

	if (ret == COMPRESS_OUT_BUFFER_OVERFLOW && flush_type == SYNC_FLUSH
	    && loop_count >= MAX_LOOPS)
		ret = COMPRESS_LOOP_COUNT_OVERFLOW;

	return ret;

}

/* Compress the input data into the outbuffer in one call to isal_deflate */
int compress_single_pass(uint8_t * data, uint32_t data_size, uint8_t * compressed_buf,
			 uint32_t * compressed_size, uint32_t flush_type, uint32_t gzip_flag,
			 uint32_t level, uint8_t * dict, uint32_t dict_len)
{
	int ret = IGZIP_COMP_OK;
	struct isal_zstream stream;
	struct isal_zstate *state = &stream.internal_state;
	uint32_t level_buf_size;
	uint8_t *level_buf = NULL;
	struct isal_hufftables *huff_tmp;
	uint32_t reset_test_flag = 0;

#ifdef VERBOSE
	printf("Starting Compress Single Pass\n");
#endif

	create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

	isal_deflate_init(&stream);

	set_random_hufftable(&stream);

	if (state->state != ZSTATE_NEW_HDR)
		return COMPRESS_INCORRECT_STATE;

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		huff_tmp = stream.hufftables;
		create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

		/* Restore variables not necessarily set by user */
		stream.hufftables = huff_tmp;
		stream.end_of_stream = 0;
		stream.level = 0;
		stream.level_buf = NULL;
		stream.level_buf_size = 0;
	}

	stream.flush = flush_type;
	stream.avail_in = data_size;
	stream.next_in = data;
	stream.avail_out = *compressed_size;
	stream.next_out = compressed_buf;
	stream.end_of_stream = 1;
	stream.gzip_flag = gzip_flag;
	stream.level = level;

	if (level >= 1) {
		level_buf_size = rand() % IBUF_SIZE + ISAL_DEF_LVL1_MIN;
		level_buf = malloc(level_buf_size);
		create_rand_repeat_data(level_buf, level_buf_size);
		stream.level_buf = level_buf;
		stream.level_buf_size = level_buf_size;
	}

	if (reset_test_flag)
		isal_deflate_reset(&stream);

	if (dict != NULL)
		isal_deflate_set_dict(&stream, dict, dict_len);
	ret =
	    isal_deflate_with_checks(&stream, data_size, *compressed_size, data, data_size,
				     data_size, compressed_buf, *compressed_size, 0);

	if (level_buf != NULL)
		free(level_buf);

	/* Check if the compression is completed */
	if (state->state == ZSTATE_END)
		*compressed_size = stream.total_out;
	else if (flush_type == SYNC_FLUSH && stream.avail_out < 16)
		ret = COMPRESS_OUT_BUFFER_OVERFLOW;

	return ret;

}

/* Statelessly compress the input buffer into the output buffer */
int compress_stateless(uint8_t * data, uint32_t data_size, uint8_t * compressed_buf,
		       uint32_t * compressed_size, uint32_t flush_type, uint32_t gzip_flag,
		       uint32_t level)
{
	int ret = IGZIP_COMP_OK;
	struct isal_zstream stream;
	uint32_t level_buf_size;
	uint8_t *level_buf = NULL;
	struct isal_hufftables *huff_tmp;
	uint32_t reset_test_flag = 0;

	create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

	isal_deflate_stateless_init(&stream);

	set_random_hufftable(&stream);

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		huff_tmp = stream.hufftables;
		create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

		/* Restore variables not necessarily set by user */
		stream.hufftables = huff_tmp;
		stream.end_of_stream = 0;
		stream.level = 0;
		stream.level_buf = NULL;
		stream.level_buf_size = 0;
	}

	stream.avail_in = data_size;
	stream.next_in = data;
	stream.flush = flush_type;
	if (flush_type != NO_FLUSH)
		stream.end_of_stream = 1;
	stream.avail_out = *compressed_size;
	stream.next_out = compressed_buf;
	stream.gzip_flag = gzip_flag;
	stream.level = level;

	if (level >= 1) {
		level_buf_size = rand() % IBUF_SIZE;
		/* printf("level_buf_size = %d\n", level_buf_size); */
		if (level_buf_size >= ISAL_DEF_LVL1_MIN) {
			level_buf = malloc(level_buf_size);
			create_rand_repeat_data(level_buf, level_buf_size);
			stream.level_buf = level_buf;
			stream.level_buf_size = level_buf_size;
		}
	}

	if (reset_test_flag) {
		isal_deflate_reset(&stream);
		/* printf("post reset level_buf_size = %d\n", level_buf_size); */
	}
	ret = isal_deflate_stateless(&stream);

	if (level_buf != NULL)
		free(level_buf);

	/* verify the stream */
	if (stream.next_in - data != stream.total_in ||
	    stream.total_in + stream.avail_in != data_size)
		return COMPRESS_INPUT_STREAM_INTEGRITY_ERROR;

	if (stream.next_out - compressed_buf != stream.total_out ||
	    stream.total_out + stream.avail_out != *compressed_size) {
		return COMPRESS_OUTPUT_STREAM_INTEGRITY_ERROR;
	}

	if (ret != IGZIP_COMP_OK) {
		if (ret == STATELESS_OVERFLOW)
			return COMPRESS_OUT_BUFFER_OVERFLOW;
		else if (ret == INVALID_FLUSH)
			return INVALID_FLUSH_ERROR;
		else
			return COMPRESS_GENERAL_ERROR;
	}

	if (!stream.end_of_stream) {
		return COMPRESS_END_OF_STREAM_NOT_SET;
	}

	if (stream.avail_in != 0)
		return COMPRESS_ALL_INPUT_FAIL;

	*compressed_size = stream.total_out;

	return ret;

}

/* Statelessly compress the input buffer into the output buffer */
int compress_stateless_full_flush(uint8_t * data, uint32_t data_size, uint8_t * compressed_buf,
				  uint32_t * compressed_size, uint32_t level)
{
	int ret = IGZIP_COMP_OK;
	uint8_t *in_buf = NULL, *level_buf = NULL, *out_buf = compressed_buf;
	uint32_t in_size = 0, level_buf_size;
	uint32_t in_processed = 00;
	struct isal_zstream stream;
	uint32_t loop_count = 0;
	struct isal_hufftables *huff_tmp;
	uint32_t reset_test_flag = 0;

#ifdef VERBOSE
	printf("Starting Stateless Compress Full Flush\n");
#endif

	create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

	isal_deflate_stateless_init(&stream);

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		huff_tmp = stream.hufftables;
		create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

		/* Restore variables not necessarily set by user */
		stream.hufftables = huff_tmp;
		stream.end_of_stream = 0;
		stream.level = 0;
		stream.level_buf = NULL;
		stream.level_buf_size = 0;
	}

	stream.flush = FULL_FLUSH;
	stream.end_of_stream = 0;
	stream.avail_out = *compressed_size;
	stream.next_out = compressed_buf;
	stream.level = level;

	if (level >= 1) {
		level_buf_size = rand() % IBUF_SIZE;
		if (level_buf_size >= ISAL_DEF_LVL1_MIN) {
			level_buf = malloc(level_buf_size);
			create_rand_repeat_data(level_buf, level_buf_size);
			stream.level_buf = level_buf;
			stream.level_buf_size = level_buf_size;
		}
	}

	if (reset_test_flag)
		isal_deflate_reset(&stream);

	while (1) {
		loop_count++;

		/* Randomly choose size of the next out buffer */
		in_size = rand() % (data_size + 1);

		/* Limit size of buffer to be smaller than maximum */
		if (in_size >= data_size - in_processed) {
			in_size = data_size - in_processed;
			stream.end_of_stream = 1;
		}

		stream.avail_in = in_size;

		if (in_size != 0) {
			if (in_buf != NULL) {
				free(in_buf);
				in_buf = NULL;
			}

			in_buf = malloc(in_size);
			if (in_buf == NULL) {
				ret = MALLOC_FAILED;
				break;
			}
			memcpy(in_buf, data + in_processed, in_size);
			in_processed += in_size;

			stream.next_in = in_buf;
		}

		out_buf = stream.next_out;

		if (stream.internal_state.state == ZSTATE_NEW_HDR)
			set_random_hufftable(&stream);

		ret = isal_deflate_stateless(&stream);
		assert(stream.internal_state.bitbuf.m_bit_count == 0);

		assert(compressed_buf == stream.next_out - stream.total_out);
		if (ret)
			break;

		/* Verify that blocks are independent */
		ret =
		    inflate_check(out_buf, stream.next_out - out_buf, in_buf, in_size, 0, NULL,
				  0);

		if (ret == INFLATE_INVALID_LOOK_BACK_DISTANCE) {
			break;
		} else
			ret = 0;

		/* Check if the compression is completed */
		if (in_processed == data_size) {
			*compressed_size = stream.total_out;
			break;
		}

	}

	if (level_buf != NULL)
		free(level_buf);

	if (in_buf != NULL)
		free(in_buf);

	if (ret == STATELESS_OVERFLOW && loop_count >= MAX_LOOPS)
		ret = COMPRESS_LOOP_COUNT_OVERFLOW;

	return ret;

}

/* Compress the input data into the output buffer where the input buffer and
 * is randomly segmented to test for independence of blocks in full flush
 * compression*/
int compress_full_flush(uint8_t * data, uint32_t data_size, uint8_t * compressed_buf,
			uint32_t * compressed_size, uint32_t gzip_flag, uint32_t level)
{
	int ret = IGZIP_COMP_OK;
	uint8_t *in_buf = NULL, *out_buf = compressed_buf, *level_buf = NULL;
	uint32_t in_size = 0, level_buf_size;
	uint32_t in_processed = 00;
	struct isal_zstream stream;
	struct isal_zstate *state = &stream.internal_state;
	uint32_t loop_count = 0;
	struct isal_hufftables *huff_tmp;
	uint32_t reset_test_flag = 0;

#ifdef VERBOSE
	printf("Starting Compress Full Flush\n");
#endif

	create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

	isal_deflate_init(&stream);

	if (state->state != ZSTATE_NEW_HDR)
		return COMPRESS_INCORRECT_STATE;

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		huff_tmp = stream.hufftables;
		create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

		/* Restore variables not necessarily set by user */
		stream.hufftables = huff_tmp;
		stream.end_of_stream = 0;
		stream.level = 0;
		stream.level_buf = NULL;
		stream.level_buf_size = 0;
	}

	stream.flush = FULL_FLUSH;
	stream.end_of_stream = 0;
	stream.avail_out = *compressed_size;
	stream.next_out = compressed_buf;
	stream.total_out = 0;
	stream.gzip_flag = gzip_flag;
	stream.level = level;

	if (level >= 1) {
		level_buf_size = rand() % IBUF_SIZE + ISAL_DEF_LVL1_MIN;
		if (level_buf_size >= ISAL_DEF_LVL1_MIN) {
			level_buf = malloc(level_buf_size);
			create_rand_repeat_data(level_buf, level_buf_size);
			stream.level_buf = level_buf;
			stream.level_buf_size = level_buf_size;
		}
	}

	if (reset_test_flag)
		isal_deflate_reset(&stream);

	while (1) {
		loop_count++;

		/* Setup in buffer for next round of compression */
		if (state->state == ZSTATE_NEW_HDR) {
			/* Randomly choose size of the next out buffer */
			in_size = rand() % (data_size + 1);

			/* Limit size of buffer to be smaller than maximum */
			if (in_size >= data_size - in_processed) {
				in_size = data_size - in_processed;
				stream.end_of_stream = 1;
			}

			stream.avail_in = in_size;

			if (in_size != 0) {
				if (in_buf != NULL) {
					free(in_buf);
					in_buf = NULL;
				}

				in_buf = malloc(in_size);
				if (in_buf == NULL) {
					ret = MALLOC_FAILED;
					break;
				}
				memcpy(in_buf, data + in_processed, in_size);
				in_processed += in_size;

				stream.next_in = in_buf;
			}

			out_buf = stream.next_out;
		}

		if (state->state == ZSTATE_NEW_HDR)
			set_random_hufftable(&stream);

		ret = isal_deflate(&stream);

		if (ret)
			break;

		/* Verify that blocks are independent */
		if (state->state == ZSTATE_NEW_HDR || state->state == ZSTATE_END) {
			ret =
			    inflate_check(out_buf, stream.next_out - out_buf, in_buf, in_size,
					  0, NULL, 0);

			if (ret == INFLATE_INVALID_LOOK_BACK_DISTANCE)
				break;
			else
				ret = 0;
		}

		/* Check if the compression is completed */
		if (state->state == ZSTATE_END) {
			*compressed_size = stream.total_out;
			break;
		}

	}

	if (level_buf != NULL)
		free(level_buf);

	if (in_buf != NULL)
		free(in_buf);

	if (ret == COMPRESS_OUT_BUFFER_OVERFLOW && loop_count >= MAX_LOOPS)
		ret = COMPRESS_LOOP_COUNT_OVERFLOW;

	return ret;

}

/*Compress the input buffer into the output buffer, but switch the flush type in
 * the middle of the compression to test what happens*/
int compress_swap_flush(uint8_t * data, uint32_t data_size, uint8_t * compressed_buf,
			uint32_t * compressed_size, uint32_t flush_type, uint32_t gzip_flag)
{
	int ret = IGZIP_COMP_OK;
	struct isal_zstream stream;
	struct isal_zstate *state = &stream.internal_state;
	uint32_t partial_size;
	struct isal_hufftables *huff_tmp;
	uint32_t reset_test_flag = 0;

#ifdef VERBOSE
	printf("Starting Compress Swap Flush\n");
#endif

	isal_deflate_init(&stream);

	set_random_hufftable(&stream);

	if (state->state != ZSTATE_NEW_HDR)
		return COMPRESS_INCORRECT_STATE;

	if (rand() % 4 == 0) {
		/* Test reset */
		reset_test_flag = 1;
		huff_tmp = stream.hufftables;
		create_rand_repeat_data((uint8_t *) & stream, sizeof(stream));

		/* Restore variables not necessarily set by user */
		stream.hufftables = huff_tmp;
		stream.end_of_stream = 0;
		stream.level = 0;
		stream.level_buf = NULL;
		stream.level_buf_size = 0;
	}

	partial_size = rand() % (data_size + 1);

	stream.flush = flush_type;
	stream.avail_in = partial_size;
	stream.next_in = data;
	stream.avail_out = *compressed_size;
	stream.next_out = compressed_buf;
	stream.end_of_stream = 0;
	stream.gzip_flag = gzip_flag;

	if (reset_test_flag)
		isal_deflate_reset(&stream);

	ret =
	    isal_deflate_with_checks(&stream, data_size, *compressed_size, data, partial_size,
				     partial_size, compressed_buf, *compressed_size, 0);

	if (ret)
		return ret;

	if (state->state == ZSTATE_NEW_HDR)
		set_random_hufftable(&stream);

	flush_type = rand() % 3;

	stream.flush = flush_type;
	stream.avail_in = data_size - partial_size;
	stream.next_in = data + partial_size;
	stream.end_of_stream = 1;

	ret =
	    isal_deflate_with_checks(&stream, data_size, *compressed_size, data + partial_size,
				     data_size - partial_size, data_size, compressed_buf,
				     *compressed_size, 0);

	if (ret == COMPRESS_GENERAL_ERROR)
		return INVALID_FLUSH_ERROR;

	*compressed_size = stream.total_out;

	return ret;
}

/* Test deflate_stateless */
int test_compress_stateless(uint8_t * in_data, uint32_t in_size, uint32_t flush_type)
{
	int ret = IGZIP_COMP_OK;
	uint32_t z_size, overflow, gzip_flag, level;
	uint8_t *z_buf = NULL;
	uint8_t *in_buf = NULL;

	gzip_flag = rand() % 5;
	level = rand() % 2;

	if (in_size != 0) {
		in_buf = malloc(in_size);

		if (in_buf == NULL)
			return MALLOC_FAILED;

		memcpy(in_buf, in_data, in_size);
	}

	/* Test non-overflow case where a type 0 block is not written */
	z_size = 2 * in_size + hdr_bytes;
	if (gzip_flag == IGZIP_GZIP)
		z_size += gzip_extra_bytes;
	else if (gzip_flag == IGZIP_GZIP_NO_HDR)
		z_size += gzip_trl_bytes;
	else if (gzip_flag == IGZIP_ZLIB)
		z_size += zlib_extra_bytes;
	else if (gzip_flag == IGZIP_ZLIB_NO_HDR)
		z_size += zlib_trl_bytes;

	z_buf = malloc(z_size);

	if (z_buf == NULL)
		return MALLOC_FAILED;

	create_rand_repeat_data(z_buf, z_size);

	/* If flush type is invalid */
	if (flush_type != NO_FLUSH && flush_type != FULL_FLUSH) {
		ret =
		    compress_stateless(in_buf, in_size, z_buf, &z_size, flush_type, gzip_flag,
				       level);

		if (ret != INVALID_FLUSH_ERROR)
			print_error(ret);
		else
			ret = 0;

		if (z_buf != NULL)
			free(z_buf);

		if (in_buf != NULL)
			free(in_buf);

		return ret;
	}

	/* Else test valid flush type */
	ret =
	    compress_stateless(in_buf, in_size, z_buf, &z_size, flush_type, gzip_flag, level);

	if (!ret)
		ret = inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, NULL, 0);

#ifdef VERBOSE
	if (ret) {
		printf
		    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
		     level, gzip_flag, flush_type);
		print_uint8_t(z_buf, z_size);
		printf("\n");
		printf("Data: ");
		print_uint8_t(in_buf, in_size);
	}
#endif
	if (z_buf != NULL) {
		free(z_buf);
		z_buf = NULL;
	}

	print_error(ret);
	if (ret)
		return ret;

	/*Test non-overflow case where a type 0 block is possible to be written */
	z_size = TYPE0_HDR_SIZE * ((in_size + TYPE0_MAX_SIZE - 1) / TYPE0_MAX_SIZE) + in_size;

	if (gzip_flag == IGZIP_GZIP)
		z_size += gzip_extra_bytes;
	else if (gzip_flag == IGZIP_GZIP_NO_HDR)
		z_size += gzip_trl_bytes;
	else if (gzip_flag == IGZIP_ZLIB)
		z_size += zlib_extra_bytes;
	else if (gzip_flag == IGZIP_ZLIB_NO_HDR)
		z_size += zlib_trl_bytes;

	if (z_size <= gzip_extra_bytes)
		z_size += TYPE0_HDR_SIZE;

	if (z_size < 8)
		z_size = 8;

	z_buf = malloc(z_size);

	if (z_buf == NULL)
		return MALLOC_FAILED;

	create_rand_repeat_data(z_buf, z_size);

	ret =
	    compress_stateless(in_buf, in_size, z_buf, &z_size, flush_type, gzip_flag, level);
	if (!ret)
		ret = inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, NULL, 0);
#ifdef VERBOSE
	if (ret) {
		printf
		    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
		     level, gzip_flag, flush_type);
		print_uint8_t(z_buf, z_size);
		printf("\n");
		printf("Data: ");
		print_uint8_t(in_buf, in_size);
	}
#endif

	if (!ret) {
		free(z_buf);
		z_buf = NULL;

		/* Test random overflow case */
		z_size = rand() % z_size;

		if (z_size > in_size)
			z_size = rand() & in_size;

		if (z_size > 0) {
			z_buf = malloc(z_size);

			if (z_buf == NULL)
				return MALLOC_FAILED;
		}

		overflow =
		    compress_stateless(in_buf, in_size, z_buf, &z_size, flush_type, gzip_flag,
				       level);

		if (overflow != COMPRESS_OUT_BUFFER_OVERFLOW) {
			if (overflow == 0)
				ret =
				    inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag,
						  NULL, 0);

			if (overflow != 0 || ret != 0) {
#ifdef VERBOSE
				printf("overflow error = %d\n", overflow);
				print_error(overflow);
				printf("inflate ret = %d\n", ret);
				print_error(overflow);

				printf
				    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
				     level, gzip_flag, flush_type);

				print_uint8_t(z_buf, z_size);
				printf("\n");
				printf("Data: ");
				print_uint8_t(in_buf, in_size);
#endif
				printf("Failed on compress single pass overflow\n");
				print_error(ret);
				ret = OVERFLOW_TEST_ERROR;
			}
		}
	}

	print_error(ret);
	if (ret) {
		if (z_buf != NULL) {
			free(z_buf);
			z_buf = NULL;
		}
		if (in_buf != NULL)
			free(in_buf);
		return ret;
	}

	if (flush_type == FULL_FLUSH) {
		if (z_buf != NULL)
			free(z_buf);

		z_size = 2 * in_size + MAX_LOOPS * (hdr_bytes + 5);

		z_buf = malloc(z_size);

		if (z_buf == NULL)
			return MALLOC_FAILED;

		create_rand_repeat_data(z_buf, z_size);

		/* Else test valid flush type */
		ret = compress_stateless_full_flush(in_buf, in_size, z_buf, &z_size, level);

		if (!ret)
			ret = inflate_check(z_buf, z_size, in_buf, in_size, 0, NULL, 0);
		else if (ret == COMPRESS_LOOP_COUNT_OVERFLOW)
			ret = 0;

		print_error(ret);
#ifdef VERBOSE
		if (ret) {
			printf
			    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
			     level, gzip_flag, FULL_FLUSH);
			print_uint8_t(z_buf, z_size);
			printf("\n");
			printf("Data: ");
			print_uint8_t(in_buf, in_size);
		}
#endif
	}
	if (z_buf != NULL)
		free(z_buf);

	if (in_buf != NULL)
		free(in_buf);

	return ret;
}

/* Test deflate */
int test_compress(uint8_t * in_buf, uint32_t in_size, uint32_t flush_type)
{
	int ret = IGZIP_COMP_OK, fin_ret = IGZIP_COMP_OK;
	uint32_t overflow = 0, gzip_flag, level;
	uint32_t z_size = 0, z_size_max = 0, z_compressed_size, dict_len = 0;
	uint8_t *z_buf = NULL, *dict = NULL;

	/* Test a non overflow case */
	if (flush_type == NO_FLUSH)
		z_size_max = 2 * in_size + hdr_bytes + 2;
	else if (flush_type == SYNC_FLUSH || flush_type == FULL_FLUSH)
		z_size_max = 2 * in_size + MAX_LOOPS * (hdr_bytes + 5);
	else {
		printf("Invalid Flush Parameter\n");
		return COMPRESS_GENERAL_ERROR;
	}

	gzip_flag = rand() % 5;
	level = rand() % 2;

	z_size = z_size_max;

	if (gzip_flag == IGZIP_GZIP)
		z_size += gzip_extra_bytes;
	else if (gzip_flag == IGZIP_GZIP_NO_HDR)
		z_size += gzip_trl_bytes;
	else if (gzip_flag == IGZIP_ZLIB)
		z_size += zlib_extra_bytes;
	else if (gzip_flag == IGZIP_ZLIB_NO_HDR)
		z_size += zlib_trl_bytes;

	z_buf = malloc(z_size);
	if (z_buf == NULL) {
		print_error(MALLOC_FAILED);
		return MALLOC_FAILED;
	}
	create_rand_repeat_data(z_buf, z_size);

	if (rand() % 8 == 0) {
		dict_len = (rand() % IGZIP_HIST_SIZE) + 1;
		dict = malloc(dict_len);
		if (dict == NULL) {
			print_error(MALLOC_FAILED);
			return MALLOC_FAILED;
		}
		create_rand_dict(dict, dict_len, z_buf, z_size);
	}

	ret = compress_single_pass(in_buf, in_size, z_buf, &z_size, flush_type,
				   gzip_flag, level, dict, dict_len);

	if (!ret)
		ret = inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, dict, dict_len);

	if (ret) {
#ifdef VERBOSE
		printf
		    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
		     level, gzip_flag, flush_type);
		print_uint8_t(z_buf, z_size);
		printf("\n");
		if (dict != NULL) {
			printf("Using Dictionary: ");
			print_uint8_t(dict, dict_len);
			printf("\n");
		}
		printf("Data: ");
		print_uint8_t(in_buf, in_size);
#endif
		printf("Failed on compress single pass\n");
		print_error(ret);
	}

	if (dict != NULL) {
		free(dict);
		dict = NULL;
		dict_len = 0;
	}

	fin_ret |= ret;

	z_compressed_size = z_size;
	z_size = z_size_max;
	create_rand_repeat_data(z_buf, z_size_max);

	if (rand() % 8 == 0) {
		dict_len = (rand() % IGZIP_HIST_SIZE) + 1;
		dict = malloc(dict_len);
		if (dict == NULL) {
			print_error(MALLOC_FAILED);
			return MALLOC_FAILED;
		}
		create_rand_dict(dict, dict_len, z_buf, z_size);
	}

	ret =
	    compress_multi_pass(in_buf, in_size, z_buf, &z_size, flush_type, gzip_flag, level,
				dict, dict_len);

	if (!ret)
		ret = inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, dict, dict_len);

	if (ret) {
#ifdef VERBOSE
		printf
		    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
		     level, gzip_flag, flush_type);
		print_uint8_t(z_buf, z_size);
		printf("\n");
		if (dict != NULL) {
			printf("Using Dictionary: ");
			print_uint8_t(dict, dict_len);
			printf("\n");
		}
		printf("Data: ");
		print_uint8_t(in_buf, in_size);
#endif
		printf("Failed on compress multi pass\n");
		print_error(ret);
	}

	if (dict != NULL) {
		free(dict);
		dict = NULL;
		dict_len = 0;
	}

	fin_ret |= ret;

	ret = 0;

	/* Test random overflow case */
	if (flush_type == SYNC_FLUSH && z_compressed_size > in_size)
		z_compressed_size = in_size + 1;

	z_size = rand() % z_compressed_size;
	create_rand_repeat_data(z_buf, z_size);

	overflow = compress_single_pass(in_buf, in_size, z_buf, &z_size, flush_type,
					gzip_flag, level, dict, dict_len);

	if (overflow != COMPRESS_OUT_BUFFER_OVERFLOW) {
		if (overflow == 0)
			ret =
			    inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, dict,
					  dict_len);

		/* Rarely single pass overflow will compresses data
		 * better than the initial run. This is to stop that
		 * case from erroring. */
		if (overflow != 0 || ret != 0) {
#ifdef VERBOSE
			printf("overflow error = %d\n", overflow);
			print_error(overflow);
			printf("inflate ret = %d\n", ret);
			print_error(ret);

			printf
			    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
			     level, gzip_flag, flush_type);
			print_uint8_t(z_buf, z_size);
			printf("\n");
			printf("Data: ");
			print_uint8_t(in_buf, in_size);
#endif
			printf("Failed on compress single pass overflow\n");
			print_error(ret);
			ret = OVERFLOW_TEST_ERROR;
		}
	}

	fin_ret |= ret;

	if (flush_type == NO_FLUSH) {
		create_rand_repeat_data(z_buf, z_size);

		overflow =
		    compress_multi_pass(in_buf, in_size, z_buf, &z_size, flush_type,
					gzip_flag, level, dict, dict_len);

		if (overflow != COMPRESS_OUT_BUFFER_OVERFLOW) {
			if (overflow == 0)
				ret =
				    inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag,
						  dict, dict_len);

			/* Rarely multi pass overflow will compresses data
			 * better than the initial run. This is to stop that
			 * case from erroring */
			if (overflow != 0 || ret != 0) {
#ifdef VERBOSE
				printf("overflow error = %d\n", overflow);
				print_error(overflow);
				printf("inflate ret = %d\n", ret);
				print_error(ret);
				printf
				    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
				     level, gzip_flag, flush_type);
				print_uint8_t(z_buf, z_size);
				printf("\n");
				printf("Data: ");
				print_uint8_t(in_buf, in_size);
#endif
				printf("Failed on compress multi pass overflow\n");
				print_error(ret);
				ret = OVERFLOW_TEST_ERROR;
			}
		}
		fin_ret |= ret;
	}

	free(z_buf);

	return fin_ret;
}

/* Test swapping flush types in the middle of compression */
int test_flush(uint8_t * in_buf, uint32_t in_size)
{
	int fin_ret = IGZIP_COMP_OK, ret;
	uint32_t z_size, flush_type = 0, gzip_flag, level;
	uint8_t *z_buf = NULL;

	gzip_flag = rand() % 5;
	level = rand() % 2;

	z_size = 2 * in_size + 2 * hdr_bytes + 8;
	if (gzip_flag == IGZIP_GZIP)
		z_size += gzip_extra_bytes;
	else if (gzip_flag == IGZIP_GZIP_NO_HDR)
		z_size += gzip_trl_bytes;
	else if (gzip_flag == IGZIP_ZLIB)
		z_size += zlib_extra_bytes;
	else if (gzip_flag == IGZIP_ZLIB_NO_HDR)
		z_size += zlib_trl_bytes;

	z_buf = malloc(z_size);

	if (z_buf == NULL)
		return MALLOC_FAILED;

	create_rand_repeat_data(z_buf, z_size);

	while (flush_type < 3)
		flush_type = rand() & 0xFFFF;

	/* Test invalid flush */
	ret = compress_single_pass(in_buf, in_size, z_buf, &z_size, flush_type,
				   gzip_flag, level, NULL, 0);

	if (ret == COMPRESS_GENERAL_ERROR)
		ret = 0;
	else {
		printf("Failed when passing invalid flush parameter\n");
		ret = INVALID_FLUSH_ERROR;
	}

	fin_ret |= ret;
	print_error(ret);

	create_rand_repeat_data(z_buf, z_size);

	/* Test swapping flush type */
	ret = compress_swap_flush(in_buf, in_size, z_buf, &z_size, rand() % 3, gzip_flag);

	if (!ret)
		ret = inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, NULL, 0);

	if (ret) {
#ifdef VERBOSE
		printf("Compressed array at level %d with gzip flag %d: ", level, gzip_flag);
		print_uint8_t(z_buf, z_size);
		printf("\n");
		printf("Data: ");
		print_uint8_t(in_buf, in_size);
#endif
		printf("Failed on swapping flush type\n");
		print_error(ret);
	}

	fin_ret |= ret;
	print_error(ret);

	return fin_ret;
}

/* Test there are no length distance pairs across full flushes */
int test_full_flush(uint8_t * in_buf, uint32_t in_size)
{
	int ret = IGZIP_COMP_OK;
	uint32_t z_size, gzip_flag, level;
	uint8_t *z_buf = NULL;

	gzip_flag = rand() % 5;
	level = rand() % 2;
	z_size = 2 * in_size + MAX_LOOPS * (hdr_bytes + 5);

	if (gzip_flag == IGZIP_GZIP)
		z_size += gzip_extra_bytes;
	else if (gzip_flag == IGZIP_GZIP_NO_HDR)
		z_size += gzip_trl_bytes;
	else if (gzip_flag == IGZIP_ZLIB)
		z_size += zlib_extra_bytes;
	else if (gzip_flag == IGZIP_ZLIB_NO_HDR)
		z_size += zlib_trl_bytes;

	z_buf = malloc(z_size);
	if (z_buf == NULL) {
		print_error(MALLOC_FAILED);
		return MALLOC_FAILED;
	}

	create_rand_repeat_data(z_buf, z_size);

	ret = compress_full_flush(in_buf, in_size, z_buf, &z_size, gzip_flag, level);

	if (!ret)
		ret = inflate_check(z_buf, z_size, in_buf, in_size, gzip_flag, NULL, 0);

	if (ret) {
#ifdef VERBOSE
		printf
		    ("Compressed array at level %d with gzip flag %d and flush type %d: ",
		     level, gzip_flag, FULL_FLUSH);
		print_uint8_t(z_buf, z_size);
		printf("\n");
		printf("Data: ");
		print_uint8_t(in_buf, in_size);
#endif
		printf("Failed on compress multi pass\n");
		print_error(ret);
	}

	free(z_buf);

	return ret;
}

int test_inflate(struct vect_result *in_vector)
{
	int ret = IGZIP_COMP_OK;
	uint8_t *compress_buf = in_vector->vector, *out_buf = NULL;
	uint64_t compress_len = in_vector->vector_length;
	uint32_t out_size = 0;

	out_size = 10 * in_vector->vector_length;
	out_buf = malloc(out_size);
	if (out_buf == NULL)
		return MALLOC_FAILED;

	ret = inflate_stateless_pass(compress_buf, compress_len, out_buf, &out_size, 0);

	if (ret == INFLATE_LEFTOVER_INPUT)
		ret = ISAL_DECOMP_OK;

	if (ret != in_vector->expected_error)
		printf("Inflate return value incorrect, %d != %d\n", ret,
		       in_vector->expected_error);
	else
		ret = IGZIP_COMP_OK;

	if (!ret) {
		ret = inflate_multi_pass(compress_buf, compress_len, out_buf, &out_size,
					 0, NULL, 0);

		if (ret == INFLATE_LEFTOVER_INPUT)
			ret = ISAL_DECOMP_OK;

		if (ret != in_vector->expected_error)
			printf("Inflate return value incorrect, %d != %d\n", ret,
			       in_vector->expected_error);
		else
			ret = IGZIP_COMP_OK;
	}

	return ret;

}

/* Run multiple compression tests on data stored in a file */
int test_compress_file(char *file_name)
{
	int ret = IGZIP_COMP_OK;
	uint64_t in_size;
	uint8_t *in_buf = NULL;
	FILE *in_file = NULL;

	in_file = fopen(file_name, "rb");
	if (!in_file)
		return FILE_READ_FAILED;

	in_size = get_filesize(in_file);
	if (in_size != 0) {
		in_buf = malloc(in_size);
		if (in_buf == NULL)
			return MALLOC_FAILED;
		fread(in_buf, 1, in_size, in_file);
	}

	ret |= test_compress_stateless(in_buf, in_size, NO_FLUSH);
	ret |= test_compress_stateless(in_buf, in_size, SYNC_FLUSH);
	ret |= test_compress_stateless(in_buf, in_size, FULL_FLUSH);
	ret |= test_compress(in_buf, in_size, NO_FLUSH);
	ret |= test_compress(in_buf, in_size, SYNC_FLUSH);
	ret |= test_compress(in_buf, in_size, FULL_FLUSH);
	ret |= test_flush(in_buf, in_size);

	if (ret)
		printf("Failed on file %s\n", file_name);

	if (in_buf != NULL)
		free(in_buf);

	return ret;
}

int create_custom_hufftables(struct isal_hufftables *hufftables_custom, int argc, char *argv[])
{
	long int file_length;
	uint8_t *stream = NULL;
	struct isal_huff_histogram histogram;
	FILE *file;

	memset(&histogram, 0, sizeof(histogram));

	while (argc > 1) {
		printf("Processing %s\n", argv[argc - 1]);
		file = fopen(argv[argc - 1], "r");
		if (file == NULL) {
			printf("Error opening file\n");
			return 1;
		}
		fseek(file, 0, SEEK_END);
		file_length = ftell(file);
		fseek(file, 0, SEEK_SET);
		file_length -= ftell(file);

		if (file_length > 0) {
			stream = malloc(file_length);
			if (stream == NULL) {
				printf("Failed to allocate memory to read in file\n");
				fclose(file);
				return 1;
			}
		}

		fread(stream, 1, file_length, file);

		if (ferror(file)) {
			printf("Error occurred when reading file\n");
			fclose(file);
			free(stream);
			stream = NULL;
			return 1;
		}

		/* Create a histogram of frequency of symbols found in stream to
		 * generate the huffman tree.*/
		isal_update_histogram(stream, file_length, &histogram);

		fclose(file);
		if (stream != NULL) {
			free(stream);
			stream = NULL;
		}
		argc--;
	}

	return isal_create_hufftables(hufftables_custom, &histogram);

}

int main(int argc, char *argv[])
{
	int i = 0, ret = 0, fin_ret = 0;
	uint32_t in_size = 0, offset = 0;
	uint8_t *in_buf;
	struct isal_hufftables hufftables_custom;

#ifndef VERBOSE
	setbuf(stdout, NULL);
#endif

	printf("Window Size: %d K\n", IGZIP_HIST_SIZE / 1024);
	printf("Test Seed  : %d\n", TEST_SEED);
	printf("Randoms    : %d\n", RANDOMS);
	srand(TEST_SEED);

	if (argc > 1) {
		ret = create_custom_hufftables(&hufftables_custom, argc, argv);
		if (ret == 0)
			hufftables = &hufftables_custom;
		else {
			printf("Failed to generate custom hufftable");
			return -1;
		}
	}

	in_buf = malloc(IBUF_SIZE);
	memset(in_buf, 0, IBUF_SIZE);

	if (in_buf == NULL) {
		fprintf(stderr, "Can't allocate in_buf memory\n");
		return -1;
	}

	if (argc > 1) {
		printf("igzip_rand_test files:                  ");

		for (i = 1; i < argc; i++) {
			ret |= test_compress_file(argv[i]);
			if (ret)
				return ret;
		}

		printf("................");
		printf("%s\n", ret ? "Fail" : "Pass");
		fin_ret |= ret;
	}

	printf("igzip_rand_test stateless:              ");

	ret = test_compress_stateless((uint8_t *) str1, sizeof(str1), NO_FLUSH);
	if (ret)
		return ret;

	ret |= test_compress_stateless((uint8_t *) str2, sizeof(str2), NO_FLUSH);
	if (ret)
		return ret;

	for (i = 0; i < RANDOMS; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_compress_stateless(in_buf, in_size, NO_FLUSH);

		in_buf -= offset;

		if (i % (RANDOMS / 16) == 0)
			printf(".");

		if (ret)
			return ret;
	}

	for (i = 0; i < RANDOMS / 16; i++) {
		create_rand_repeat_data(in_buf, PAGE_SIZE);
		ret |= test_compress_stateless(in_buf, PAGE_SIZE, NO_FLUSH);	// good for efence
		if (ret)
			return ret;
	}

	fin_ret |= ret;

	ret = test_compress_stateless((uint8_t *) str1, sizeof(str1), SYNC_FLUSH);
	if (ret)
		return ret;

	ret |= test_compress_stateless((uint8_t *) str2, sizeof(str2), SYNC_FLUSH);
	if (ret)
		return ret;

	for (i = 0; i < 16; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_compress_stateless(in_buf, in_size, SYNC_FLUSH);

		in_buf -= offset;

		if (ret)
			return ret;
	}

	fin_ret |= ret;

	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip_rand_test stateless FULL_FLUSH:   ");

	ret = test_compress_stateless((uint8_t *) str1, sizeof(str1), FULL_FLUSH);
	if (ret)
		return ret;

	ret |= test_compress_stateless((uint8_t *) str2, sizeof(str2), FULL_FLUSH);
	if (ret)
		return ret;

	for (i = 0; i < RANDOMS; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_compress_stateless(in_buf, in_size, FULL_FLUSH);

		in_buf -= offset;

		if (i % (RANDOMS / 16) == 0)
			printf(".");

		if (ret)
			return ret;
	}

	for (i = 0; i < RANDOMS / 16; i++) {
		create_rand_repeat_data(in_buf, PAGE_SIZE);
		ret |= test_compress_stateless(in_buf, PAGE_SIZE, FULL_FLUSH);	// good for efence
		if (ret)
			return ret;
	}
	fin_ret |= ret;

	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip_rand_test stateful  NO_FLUSH:     ");

	ret = test_compress((uint8_t *) str1, sizeof(str1), NO_FLUSH);
	if (ret)
		return ret;

	ret |= test_compress((uint8_t *) str2, sizeof(str2), NO_FLUSH);
	if (ret)
		return ret;

	for (i = 0; i < RANDOMS; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_compress(in_buf, in_size, NO_FLUSH);

		in_buf -= offset;

		if (i % (RANDOMS / 16) == 0)
			printf(".");
		if (ret)
			return ret;
	}

	fin_ret |= ret;

	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip_rand_test stateful  SYNC_FLUSH:   ");

	ret = test_compress((uint8_t *) str1, sizeof(str1), SYNC_FLUSH);
	if (ret)
		return ret;

	ret |= test_compress((uint8_t *) str2, sizeof(str2), SYNC_FLUSH);
	if (ret)
		return ret;

	for (i = 0; i < RANDOMS; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_compress(in_buf, in_size, SYNC_FLUSH);

		in_buf -= offset;

		if (i % (RANDOMS / 16) == 0)
			printf(".");
		if (ret)
			return ret;
	}

	fin_ret |= ret;

	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip_rand_test stateful  FULL_FLUSH:   ");

	ret = test_compress((uint8_t *) str1, sizeof(str1), FULL_FLUSH);
	if (ret)
		return ret;

	ret |= test_compress((uint8_t *) str2, sizeof(str2), FULL_FLUSH);
	if (ret)
		return ret;

	for (i = 0; i < RANDOMS; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_compress(in_buf, in_size, FULL_FLUSH);

		in_buf -= offset;

		if (i % (RANDOMS / 16) == 0)
			printf(".");
		if (ret)
			return ret;
	}

	for (i = 0; i < RANDOMS / 8; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_full_flush(in_buf, in_size);

		in_buf -= offset;

		if (ret)
			return ret;
	}

	fin_ret |= ret;

	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip_rand_test stateful  Change Flush: ");

	ret = test_flush((uint8_t *) str1, sizeof(str1));
	if (ret)
		return ret;

	ret |= test_flush((uint8_t *) str2, sizeof(str2));
	if (ret)
		return ret;

	for (i = 0; i < RANDOMS / 4; i++) {
		in_size = get_rand_data_length();
		offset = rand() % (IBUF_SIZE + 1 - in_size);
		in_buf += offset;

		create_rand_repeat_data(in_buf, in_size);

		ret |= test_flush(in_buf, in_size);

		in_buf -= offset;

		if (i % ((RANDOMS / 4) / 16) == 0)
			printf(".");
		if (ret)
			return ret;
	}

	fin_ret |= ret;

	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip_rand_test inflate   Std Vectors:  ");

	for (i = 0; i < sizeof(std_vect_array) / sizeof(struct vect_result); i++) {
		ret = test_inflate(&std_vect_array[i]);
		if (ret)
			return ret;
	}
	printf("................");
	printf("%s\n", ret ? "Fail" : "Pass");

	printf("igzip rand test finished: %s\n",
	       fin_ret ? "Some tests failed" : "All tests passed");

	return fin_ret != IGZIP_COMP_OK;
}