DPS915/M-N-M
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Team: M-N-M
Team Members
Potential Projects
| Project Name | Project Description | Status |
|---|---|---|
| C Compiler | Take the compilation process and transfer it to the GPU | failed |
| Galactic Collision Simulation | A 2D simulation of two galaxies colliding, with fully simulated gravity effects. | cannot benefit from parallel computing,already fast enough |
| Isomorphism of graphs | Check if two graphs are isomorphic in nature. This is a very straight forward program. | failed |
| Image Processing | Mathematical operations applied to images for colour negation, rotation, blurring effects, etc. | scrapped |
| Facial Recognition system | Speed up time taken to match face with database | already CUDA enabled |
| Steganography | Speed up the process of encrypting one type of file into another | Profiled |
| Prime number generator | Generate prime numbers | Profiled |
| LZW File compression | Compress files using Lempel-Ziv-Welch algorithm | Profiled |
Progress
Assignment 1
Mohamed Baig: Steganography using Steghide
- Steghide has certain dependencies that it uses to complete its function.
- Dependencies:
- libmash
- libcrypt
- libjpeg
- zlib
- Ran the Configure file to see if I have all the Dependencies
- Installed the all the dependencies
- Ran Configure again to generate Makefile in the src folder
- Altered the Makefile to enable profiling
- Altered some source files to avoid errors
AuSampleValues.cc
#include "AuSampleValues.h" // AuMuLawSampleValue template <> //My change const BYTE AuMuLawSampleValue::MinValue = 0 ; template <> //My change const BYTE AuMuLawSampleValue::MaxValue = BYTE_MAX ; // AuPCM8SampleValue template <> //My change const SBYTE AuPCM8SampleValue::MinValue = SBYTE_MIN ; template <> //My change const SBYTE AuPCM8SampleValue::MaxValue = SBYTE_MAX ; // AuPCM16SampleValue template <> //My change const SWORD16 AuPCM16SampleValue::MinValue = SWORD16_MIN ; template <> //My change const SWORD16 AuPCM16SampleValue::MaxValue = SWORD16_MAX ; // AuPCM32SampleValue template <> //My change const SWORD32 AuPCM32SampleValue::MinValue = SWORD32_MIN ; template <> //My change const SWORD32 AuPCM32SampleValue::MaxValue = SWORD32_MAX ;
AuData.h
#ifndef SH_AUDATA_H
#define SH_AUDATA_H
#include "BinaryIO.h"
#include "AudioData.h"
// AuMuLawAudioData
typedef AudioDataImpl<AuMuLaw,BYTE> AuMuLawAudioData ;
template <> //My change
inline BYTE AuMuLawAudioData::readValue (BinaryIO* io) const { return (io->read8()) ; }
template <> //My change
inline void AuMuLawAudioData::writeValue (BinaryIO* io, BYTE v) const { io->write8(v) ; }
// AuPCM8AudioData
typedef AudioDataImpl<AuPCM8,SBYTE> AuPCM8AudioData ;
template <> //My change
inline SBYTE AuPCM8AudioData::readValue (BinaryIO* io) const { return ((SBYTE) io->read8()) ; }
template <> //My change
inline void AuPCM8AudioData::writeValue (BinaryIO* io, SBYTE v) const { io->write8((BYTE) v) ; }
// AuPCM16AudioData
typedef AudioDataImpl<AuPCM16,SWORD16> AuPCM16AudioData ;
template <> //My change
inline SWORD16 AuPCM16AudioData::readValue (BinaryIO* io) const { return ((SWORD16) io->read16_be()) ; }
template <> //My change
inline void AuPCM16AudioData::writeValue (BinaryIO* io, SWORD16 v) const { io->write16_be((UWORD16) v) ; }
// AuPCM32AudioData
typedef AudioDataImpl<AuPCM32,SWORD32> AuPCM32AudioData ;
template <> //My change
inline SWORD32 AuPCM32AudioData::readValue (BinaryIO* io) const { return ((SWORD32) io->read32_be()) ; }
template <> //My change
inline void AuPCM32AudioData::writeValue (BinaryIO* io, SWORD32 v) const { io->write32_be((UWORD32) v) ; }
#endif // ndef SH_AUDATA_H
- The result of embedding kilobytes of text data into an image
Flat profile: Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls s/call s/call name 13.38 0.21 0.21 1318276 0.00 0.00 Selector::idxX(unsigned int, unsigned int, unsigned int*) const 11.47 0.39 0.18 4054789 0.00 0.00 Vertex::getDegree() const 9.55 0.54 0.15 659139 0.00 0.00 Selector::calculate(unsigned int) 7.64 0.66 0.12 659141 0.00 0.00 JpegFile::getEmbeddedValue(unsigned int) const 7.01 0.77 0.11 659139 0.00 0.00 __gnu_cxx::hashtable<std::pair<unsigned int const, unsigned int>, unsigned int, __gnu_cxx::hash<unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::equal_to<unsigned int>, std::allocator<unsigned int> >::resize(unsigned long) 6.37 0.87 0.10 328293 0.00 0.00 JpegFile::getSampleValue(unsigned int) const 5.73 0.96 0.09 1 0.09 0.09 Selector::~Selector() 3.82 1.02 0.06 1 0.06 0.09 JpegFile::read(BinaryIO*)
- The result of attempting to embed 1.7 GB of data into an image
Flat profile: Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls s/call s/call name 54.43 21.52 21.52 1192388169 0.00 0.00 BitString::_append(bool) 16.79 28.15 6.64 593200712 0.00 0.00 BitString::operator[](unsigned long) const 9.30 31.83 3.68 74898412 0.00 0.00 BitString::append(unsigned char, unsigned short) 4.78 33.72 1.89 3 0.63 6.41 BitString::append(BitString const&) 3.50 35.10 1.39 BitString::BitString(unsigned long) 1.91 35.86 0.76 BitString::clear() 1.29 36.37 0.51 1 0.51 37.26 Embedder::Embedder() 1.20 36.84 0.48 37823336 0.00 0.00 BinaryIO::eof() const
Assignment 1
Muhammad Ahsan: Prime Number Generator( 1,000,000,000 primes)
Flat profile Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls Ts/call Ts/call name 100.00 53.83 53.83 get_primes(unsigned long) 0.00 53.83 0.00 27 0.00 0.00 void std::vector<unsigned long, std::allocator<unsigned long> >::_M_emplace_back_aux<unsigned long const&>(unsigned long const&&&) 0.00 53.83 0.00 1 0.00 0.00 _GLOBAL__sub_I__Z10get_primesm
Assignment 1
Nitin Prakash Panicker: LZW File Compression
Flat profile: Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls ns/call ns/call name 99.46 48.19 48.19 CLZWCompressFile::Compress(char*, char*) 0.33 48.35 0.16 17122488 9.34 9.34 CLZWCompressFile::getc_src() 0.21 48.45 0.10 7095561 14.09 14.09 CLZWCompressFile::putc_comp(int)
lzw.cpp
#include <time.h>
#include "lzw.h"
/********************************************************************
**
** This program gets a file name from the command line. It compresses the
** file, placing its output in a file named test.lzw. It then expands
** test.lzw into test.out. Test.out should then be an exact duplicate of
** the input file.
**
*************************************************************************/
main(int argc, char *argv[])
{
clock_t timer;
CLZWCompressFile lzw;
/*
** Get the file name, open it up, and open up the lzw output file.
*/
if (argc==1)
{
printf("Input file name to compress?\n");
return 0;
}
printf("testing %s...\n", argv[1]);
/*
** Compress the file.
*/
timer = clock();
int crunch = lzw.Compress(argv[1], "test.lzw");
timer = clock() - timer; //CLOCKS_PER_SEC
printf("compress time=%d ms, encoding=%d, size=%u", timer, lzw.get_bits(), crunch);
int filesize = lzw.u_io;
printf(" (ratio=%d%%)\n", filesize ? (filesize-crunch)*100/filesize : 0);
if(lzw.AnyIOErrors())
printf("***I/O ERROR***\n");
/*
** Expand the file.
*/
timer = clock();
int orig = lzw.Expand("test.lzw", "test.out");
timer = clock() - timer; //CLOCKS_PER_SEC
printf("expand time=%d ms, encoding=%d\n", timer, lzw.get_bits());
if(lzw.AnyIOErrors())
printf("***I/O ERROR***\n");
ATLASSERT(filesize == orig); // did we mangle the file?
return 0;
}
lzw.h
#ifndef UPRIGHT_LZW_H
#define UPRIGHT_LZW_H
/* LZW.h by N.A.Bozinis @ 19/01/2010 08:55:52
* ----------------------------------------------------------------------------------
*
* Plain C++ port of LZW compression algorithm and code originally (c) Mark R. Nelson
* http://marknelson.us/1989/10/01/lzw-data-compression
* Variable bit length encoding idea and code originally by Michael Dipperstein
* http://michael.dipperstein.com/lzw
*
* There are a lot of compression classes floating around but most are based on the
* zlib (zip/unzip) library, which is good but a bit of overkill for simple and small
* code. LZW combines decent compression ratios with very small code footprint. If
* you need something more powerful here are a few resources:
*
* http://www.codeproject.com/KB/files/zip_utils.aspx
* http://www.codeproject.com/KB/cpp/xzipunzip.aspx
* http://www.codeproject.com/KB/cpp/ChauMemzip.aspx
*
* Microsoft types can check the CAB protocol that is available in all windows:
* http://www.codeproject.com/KB/files/CABCompressExtract.aspx
* http://msdn.microsoft.com/en-us/library/bb417343.aspx
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <assert.h>
#define ATLASSERT assert
/* NOTE: function and variable names left as much as possible matching the original
LZW.c by Mark, naturally bundled in classes to get rid of static/globals etc
*/
#define MIN_CODE_LEN 9 /* min # bits in a code word */
#define MAX_CODE_LEN 20 /* max # bits in a code word */
#define CURRENT_MAX_CODES(x) (1UL << (x))
#define FIRST_CODE (1 << CHAR_BIT) /* value of 1st string code */
#if (MIN_CODE_LEN <= CHAR_BIT)
#error Code words must be larger than 1 character
#endif
#if (MAX_CODE_LEN >= 25)
#error Code words must fit in an integer
#endif
/* VARIABLE BIT LENGTH ENCODING
* Instead of using a fixed number of bits for code words, we start at 9 (=MIN_CODE_LEN)
* and go up to BITS (<=MAX_CODE_LEN) so that small files are tightly packed and larger
* files are fine too. The BITS constant determines the maximum hash table size. For 18
* this means 250KB runtime table size which is enough for files ~4MB.
* There is no problem for files larger than that; if we run out of table space for new
* codes then the same codes are emitted (uncompressed obviously)
*/
#define BITS 17 /* Setting the number of bits to 12, 13*/
#define HASHING_SHIFT (BITS-8) /* or 14 affects several constants. */
#define MAX_VALUE (1 << BITS) - 1 /* Note that MS-DOS machines need to */
#define MAX_CODE MAX_VALUE - 1 /* compile their code in large model if*/
/* 14 bits are selected. */
#if BITS == 20
#define TABLE_SIZE 1048583
#elif BITS == 19
#define TABLE_SIZE 524309
#elif BITS == 18
#define TABLE_SIZE 262147
#elif BITS == 17
#define TABLE_SIZE 131101
#elif BITS == 16
#define TABLE_SIZE 65543
#elif BITS == 15
#define TABLE_SIZE 32797
#elif BITS == 14
#define TABLE_SIZE 18041 /* The string table size needs to be a */
/* prime number that is somewhat larger*/
#elif BITS == 13 /* than 2**BITS. */
#define TABLE_SIZE 9029
#elif BITS == 12
#define TABLE_SIZE 5021
#else
#error define smaller or bigger table sizes
#endif
#if (TABLE_SIZE <= MAX_VALUE)
#error your prime numbers need attention
#endif
#if (BITS > MAX_CODE_LEN)
#error BITS can only go up to a maximum
#endif
/*
This class does most of the job, except reading source and writing the compressed data
A derived class does that so that there's flexibility to read either from files or memory
*/
class CLZWImpl {
protected:
int *code_value; /* This is the code value array */
unsigned int *prefix_code; /* This array holds the prefix codes */
unsigned char *append_character; /* This array holds the appended chars */
unsigned char decode_stack[4000]; /* This array holds the decoded string */
unsigned char CUR_BITS; /* ~nab: added for variable bit size */
/* we are processing bits but in the end of the day we do I/O in bytes */
int input_bit_count, output_bit_count;
unsigned long input_bit_buffer, output_bit_buffer;
public:
CLZWImpl() {
code_value = 0;
prefix_code = 0;
append_character = 0;
}
~CLZWImpl() {
if(code_value)
free(code_value);
if(prefix_code)
free(prefix_code);
if(append_character)
free(append_character);
}
int get_bits() { return CUR_BITS; }
protected:
int Init() {
ATLASSERT(!code_value); /* call just once */
code_value=(int*)malloc(TABLE_SIZE*sizeof(int));
prefix_code=(unsigned int*)malloc(TABLE_SIZE*sizeof(unsigned int));
append_character=(unsigned char*)malloc(TABLE_SIZE*sizeof(unsigned char));
return code_value != 0 && prefix_code != 0 && append_character != 0;
}
/* override these 4: read a byte from source */
virtual int getc_src() = 0;
/* read a byte from compressed source (during expansion) and write to compressed output */
virtual int getc_comp() = 0;
/* write a byte to compressed output */
virtual int putc_comp(int ch) = 0;
/* write a byte to expanded output */
virtual int putc_out(int ch) = 0;
/*
** This is the compression routine. The code should be a fairly close
** match to the algorithm accompanying the article.
**
*/
void compress()
{
unsigned int next_code;
unsigned int character;
unsigned int string_code;
unsigned int index;
unsigned int bit_limit;
int i;
ATLASSERT(code_value); /* initialized? */
CUR_BITS = MIN_CODE_LEN;
bit_limit = CURRENT_MAX_CODES(CUR_BITS) - 1;
output_bit_count=0;
output_bit_buffer=0L;
ATLASSERT(256==FIRST_CODE);
next_code=FIRST_CODE; /* Next code is the next available string code*/
for (i=0;i<TABLE_SIZE;i++) /* Clear out the string table before starting */
code_value[i]=-1;
string_code=getc_src(); /* Get the first code */
if(-1 == string_code)
return; /* empty file or error */
/*
** This is the main loop where it all happens. This loop runs util all of
** the input has been exhausted. Note that it stops adding codes to the
** table after all of the possible codes have been defined.
*/
while ((character=getc_src()) != -1)
{
index=find_match(string_code,character);/* See if the string is in */
if (code_value[index] != -1) /* the table. If it is, */
string_code=code_value[index]; /* get the code value. If */
else /* the string is not in the*/
{ /* table, try to add it. */
if (next_code <= MAX_CODE)
{
code_value[index]=next_code++;
prefix_code[index]=string_code;
append_character[index]=character;
}
/* are we using enough bits to write out this code word? */
if(string_code >= bit_limit && CUR_BITS < BITS)
{
/* mark need for bigger code word with all ones */
output_code(bit_limit);
CUR_BITS++;
bit_limit = (CURRENT_MAX_CODES(CUR_BITS) - 1);
}
ATLASSERT(string_code < bit_limit);
output_code(string_code); /* When a string is found */
string_code=character; /* that is not in the table*/
} /* I output the last string*/
} /* after adding the new one*/
/*
** End of the main loop.
*/
output_code(string_code); /* Output the last code */
output_code(-1); /* This code flushes the output buffer*/
}
/*
** This is the hashing routine. It tries to find a match for the prefix+char
** string in the string table. If it finds it, the index is returned. If
** the string is not found, the first available index in the string table is
** returned instead.
*/
int find_match(unsigned int hash_prefix,unsigned int hash_character)
{
int index;
int offset;
index = (hash_character << HASHING_SHIFT) ^ hash_prefix;
if (index == 0)
offset = 1;
else
offset = TABLE_SIZE - index;
while (1)
{
if (code_value[index] == -1)
return(index);
if (prefix_code[index] == hash_prefix &&
append_character[index] == hash_character)
return(index);
index -= offset;
if (index < 0)
index += TABLE_SIZE;
}
}
/*
** This is the expansion routine. It takes an LZW format file, and expands
** it to an output file. The code here should be a fairly close match to
** the algorithm in the accompanying article.
*/
void expand()
{
unsigned int next_code;
unsigned int new_code;
unsigned int old_code;
int character;
unsigned char *string;
unsigned int bit_limit;
ATLASSERT(code_value); /* initialized? */
CUR_BITS = MIN_CODE_LEN;
bit_limit = CURRENT_MAX_CODES(CUR_BITS) - 1;
input_bit_count=0;
input_bit_buffer=0L;
// @@@ what if we pass uncompressed file to decode?
next_code=FIRST_CODE; /* This is the next available code to define */
old_code=input_code(); /* Read in the first code, initialize the */
if(-1 == old_code)
return; /* read error? */
character=old_code; /* character variable, and send the first */
if(putc_out(old_code)==-1) /* code to the output file */
return; /* write error */
/*
** This is the main expansion loop. It reads in characters from the LZW file
** until it sees the special code used to inidicate the end of the data.
*/
while ((new_code=input_code()) != (-1))
{
/* look for code length increase marker */
if(bit_limit == new_code && CUR_BITS < BITS)
{
CUR_BITS++;
bit_limit = CURRENT_MAX_CODES(CUR_BITS) - 1;
new_code=input_code();
ATLASSERT(new_code != -1); /* must be read error? */
if(new_code == -1)
break;
}
ATLASSERT(new_code < bit_limit);
/*
** This code checks for the special STRING+CHARACTER+STRING+CHARACTER+STRING
** case which generates an undefined code. It handles it by decoding
** the last code, and adding a single character to the end of the decode string.
*/
if (new_code>=next_code)
{
*decode_stack=character;
string=decode_string(decode_stack+1,old_code);
}
/*
** Otherwise we do a straight decode of the new code.
*/
else
string=decode_string(decode_stack,new_code);
/*
** Now we output the decoded string in reverse order.
*/
character=*string;
while (string >= decode_stack)
putc_out(*string--);
/*
** Finally, if possible, add a new code to the string table.
*/
if (next_code <= MAX_CODE)
{
prefix_code[next_code]=old_code;
append_character[next_code]=character;
next_code++;
}
old_code=new_code;
}
}
/*
** This routine simply decodes a string from the string table, storing
** it in a buffer. The buffer can then be output in reverse order by
** the expansion program.
*/
/* ~nab: these char* aren't a risk for unicode; we are reading bytes */
unsigned char *decode_string(unsigned char *buffer,unsigned int code)
{
int i;
i=0;
while (code >= FIRST_CODE)
{
*buffer++ = append_character[code];
code=prefix_code[code];
i++;
ATLASSERT(i < sizeof(decode_stack)); /* buffer overrun if it blows, increase stack size! */
}
*buffer=code;
return(buffer);
}
/*
** The following two routines are used to output variable length
** codes. They are written strictly for clarity, and are not
** particularyl efficient.
~nab: there's room for improvement in these I/O functions eg work in DWORDS instead of bytes
*/
unsigned int input_code()
{
int c;
unsigned int return_value;
//static int input_bit_count=0;
//static unsigned long input_bit_buffer=0L;
while (input_bit_count <= 24)
{
if ((c = getc_comp()) == -1)
break;
input_bit_buffer |=
(unsigned long) c << (24-input_bit_count);
input_bit_count += 8;
}
if(input_bit_count < CUR_BITS) {
ATLASSERT(!input_bit_buffer);
return -1; /* EOF */
}
return_value=input_bit_buffer >> (32-CUR_BITS);
input_bit_buffer <<= CUR_BITS;
input_bit_count -= CUR_BITS;
ATLASSERT(return_value < (1UL << CUR_BITS));
return(return_value);
}
/* bits are written outside normal byte boundaries, hence the need for keeping old values */
void output_code(unsigned int code)
{
//static int output_bit_count=0;
//static unsigned long output_bit_buffer=0L;
ATLASSERT(output_bit_count < 8); /* leftovers */
ATLASSERT(CUR_BITS + output_bit_count <= 32);
/*codes <256 are possible for single characters, zero bytes etc*/
if(-1 == code) {
/* pad remaining zeros and flush the last byte */
if(output_bit_count) {
output_bit_buffer >>= 24;
ATLASSERT((output_bit_buffer & 0xFF) == output_bit_buffer);
putc_comp(output_bit_buffer);
output_bit_count = 0;
output_bit_buffer = 0; /* in case some eejit calls us again */
}
return;
}
ATLASSERT(code < (1UL << CUR_BITS));
/* sends new bytes near the top (MSB) */
output_bit_buffer |= (unsigned long) code << (32-CUR_BITS-output_bit_count);
output_bit_count += CUR_BITS;
while (output_bit_count >= 8)
{
/* no check for error but if there was a problem we'd know from the time we wrote the identifier */
putc_comp(output_bit_buffer >> 24);
output_bit_buffer <<= 8;
output_bit_count -= 8;
}
}
}; /* CLZWImpl */
/* example derived class using C buffered I/O functions */
class CLZWCompressFile : public CLZWImpl {
public:
CLZWCompressFile() {
io_file = 0;
lzw_file = 0;
};
~CLZWCompressFile() {
ATLASSERT(!io_file);
ATLASSERT(!lzw_file);
};
int AnyIOErrors() {return io_error; }
// @@@ these char* should be changed for unicode builds
unsigned int Compress(char* input_file_name, char* to_name)
{
ATLASSERT(input_file_name && *input_file_name);
ATLASSERT(to_name && *to_name);
ATLASSERT(strcmp(to_name, input_file_name));
io_error = 1;
if(!code_value)
if(!Init())
return 0; /* rare memory error */
u_comp = 0;
u_io = 0;
io_file=fopen(input_file_name,"rb");
if(io_file) {
lzw_file=fopen(to_name,"wb");
if(lzw_file) {
/* write LZW identifier L+starting bytes */
putc('L', lzw_file);
if(putc(MIN_CODE_LEN, lzw_file) == MIN_CODE_LEN) {
compress();
io_error = ferror(lzw_file) || ferror(io_file);
if(!io_error)
ATLASSERT(u_comp <= u_io); /* this is bound to bomb every now and then, no compression! */
}
fclose(lzw_file);
lzw_file = 0;
}
fclose(io_file);
io_file = 0;
}
return u_comp;
}
unsigned int Expand(char* lzw_name, char* to_name)
{
ATLASSERT(lzw_name && *lzw_name);
ATLASSERT(to_name && *to_name);
ATLASSERT(strcmp(to_name, lzw_name));
io_error = 1;
if(!code_value)
if(!Init())
return 0; /* rare memory error */
u_comp = 0;
u_io = 0;
lzw_file=fopen(lzw_name,"rb");
if(lzw_file) {
/* check LZW identifier L+starting bytes */
int ch1 = getc(lzw_file);
int ch2 = getc(lzw_file);
if('L' == ch1 && MIN_CODE_LEN==ch2) {
io_file=fopen(to_name,"wb");
if(io_file) {
expand();
io_error = ferror(lzw_file) || ferror(io_file);
fclose(io_file);
io_file = 0;
}
}
fclose(lzw_file);
lzw_file = 0;
}
return u_io;
}
protected:
/* -1 return indicates either EOF or some IO error */
virtual int getc_src() {
ATLASSERT(io_file);
int ch = getc(io_file);
if(EOF == ch)
return -1;
u_io++;
return ch;
}
virtual int getc_comp() {
ATLASSERT(lzw_file);
int ch = getc(lzw_file);
if(EOF == ch)
return -1;
u_comp++;
return ch;
}
virtual int putc_comp(int ch) {
ATLASSERT(lzw_file);
ATLASSERT(ch >= 0 && ch < 256);
int ret = putc(ch, lzw_file);
if(ret != EOF) {
ATLASSERT(ret == ch);
u_comp++;
}
else
ret = -1;
return ret;
}
virtual int putc_out(int ch) {
ATLASSERT(io_file);
ATLASSERT(ch >= 0 && ch < 256);
int ret = putc(ch, io_file);
if(ret != EOF)
u_io++;
else
ret = -1;
return ret;
}
FILE* io_file;
FILE *lzw_file;
int io_error;
public:
unsigned long u_io, u_comp; /* bytes read and written */
};
// @@@ could have a generic one on IStream, CreateStreamOnHGlobal/SHCreateStreamOnFile
#endif /* UPRIGHT_LZW_H */
