www.pudn.com > HuffmanForFile.zip > CARMAN.C

#include  
#include  
#include  
#include  
#include  
#include  
 
/*Used in Turbo c*/ 
#define MSDOS 1 
#define DIR_STRUCT struct ffblk 
#define FIND_FIRST(n,d,a) findfirst(n,d,a) 
#define FIND_NEXT findnext 
#define DIR_FILE_NAME ff_name 
 
#define BASE_HEADER_SIZE 19 
#define CRC_MASK 0xffffffffl 
#define CRC32_POLYNOMIAL Oxedb88320l 
 
#ifndef FILENAME_MAX  
#define FILENAME_MAX 128\ 
#endif 
 
 
typedef struct header{ 
   char file_name[FILENAME_MAX]; 
   char compression_method; 
   unsigned long original; 
   unsigned long compressed_size; 
   unsigned long original_crc; 
   unsigned long header_crc; 
   }HEADER; 
 
int main( int argc,char * argv[] ); 
void FatalError( char * message,... ); 
void BuildCRCTable( void ); 
unsigned long CalculateBlockCRC32( unsigned int count, unsigned long crc,void * buffer ); 
unsigned long UpdateCharacterCRC32( unsigned long crc,int c ); 
int ParseArguments( int argc,char *  argv[] ); 
void UsageExit( void ); 
void OpenArchiveFile( char * name,int command ); 
void BuildFileList( int argc,char * argv,int command ); 
int ExpandAndMassageMSDOSFileNames( int count,char * wild_name ); 
void MassageMSDOSFileName( int count,char * file ); 
int AddFileListToArchive( void ); 
int ProcessAllFileInInputCar( int command,int count ); 
int SearchFileList( char * file_name ); 
int WildCardMatch( char * s1,char * s2 ); 
void SkipOverFileFromInputCar( void ); 
void copyFileFromInputCar( void ); 
void PrintListTitles( void ); 
void ListCarFileEntry( void ); 
int RatioInPercent( unsigned long compressed,unsigned long original ); 
int ReadFileHeader( void ); 
unsigned long UnpackUnsignedData( int number_of_bytes,unsigned char * buffer ); 
void WriteFileHeader( void ); 
void PackUnsignedData( int number_of_bytes,unsigned long number,unsigned char * buffer ); 
void WriteEndOfCarHeader( void ); 
void Insert( FILE * input_text_file,char * operation ); 
void Extract( FILE * destination ); 
int Store( FILE * input_text_file ); 
unsigned long UnStore( FILE * destination ); 
int LZSSCompress( FILE * input_text_file ); 
unsigned long LZSSExpand( FILE * destination ); 
 
char TempFileName[FILENAME_MAX]; 
FILE * InputCarFile; 
char CarFileName[FILENAME_MAX]; 
FILE *OutputCarFile; 
HEADER header; 
char * FileList[100]; 
unsigned long Ccitt32Table[256]; 
 
 
int main( int argc,char * argv[] ) 
{ 
  int command; 
  int count; 
 
  setbuf( stdout,NULL ); 
  setbuf( stderr,NULL ); 
  fprintf( stderr,"CARMAN 1.0:" ); 
  BuildCRCTable(); 
  command=ParseArguments( argc,argv ); 
  fprintf( stderr,"\n" ); 
  OpenArchiveFiles( argv[2],command ); 
  BuildFileList( argc-3,argv+3,command ); 
  if( command=='A' ) 
      count=AddFileListArchive(); 
  else 
      count=0; 
  if( command='L' ) 
      PrintListTitles(); 
  count=ProcessAllFilesInInputCar( command,count ); 
  if( OutputCarFile!=NULL && count!=0 ){ 
      WriteEnsOfCarHeader(); 
      if( ferror( OutputCarFile )||fclose( OutputCarFile )==EOF ) 
          FfatalError( "Can't write!" ); 
      remove( CarFileName ); 
      rename( TempFileName ); 
      } 
  if( command!='P' ) 
      printf( "\n%d file %s\n"count,(count==1)?"":"s" ); 
  else 
      fprintf( stderr,"\n%d file %s\n",count,(count==1)?"":"s" ); 
  return( 0 ); 
} 
 
void FatalError( char * fmt,... ) 
{ 
  va_list args; 
 
  va_start( args,fmt ); 
  putc( '\n',stderr ); 
  vfprintf( stderr,fmt,args ); 
  putc( '\n',stderr ); 
  va_end( args ); 
  if( OutputCarFile!=NULL ) 
      fclose( OutputCarFile ); 
  remove( TempFileName ); 
  exit( 1 ); 
} 
 
 
void BuildCRCTable() 
{ 
  int  i; 
  int  j; 
  unsigned long value; 
 
  for( i=0;i<=255;i++ ){ 
       value=i; 
       for( j=8;j>0;j-- ){ 
            if( value & 1 ) 
                value=( value>>1  )^CRC32_POLYNOMIAL; 
            else 
                value>>=1; 
            } 
       Ccitt32Table[i]=value; 
       } 
}