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#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#define BUFSIZE 0x1000000
#define BUFLOW 0x400
static int infile = -1;
static unsigned char nblock[ BUFSIZE + 16 ];
static unsigned char*inblock = nblock + 16;
static unsigned long inblockoffs = 0;
static unsigned long infilesize = 0;
static unsigned long infileoffs = 0;
static unsigned char to_lower[];
static unsigned char run = 1;
static void buffer_lowwatermark( void )
{
int i;
if( infilesize - infileoffs < BUFSIZE )
return;
memmove( inblock, inblock + inblockoffs, BUFSIZE - inblockoffs );
read( infile, inblock + (BUFSIZE - inblockoffs), inblockoffs);
for ( i = BUFSIZE - inblockoffs; i<BUFSIZE; ++i) inblock[i] = to_lower[inblock[i]];
infileoffs += inblockoffs;
inblockoffs = 0;
}
static void buffer_init( void )
{
int i;
read( infile, inblock, BUFSIZE);
for ( i = 0; i<BUFSIZE; ++i) inblock[i] = to_lower[inblock[i]];
}
static unsigned char to_lower[] = {
0x00, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x00, 0x02, 0x02, 0x02, 0x02, 0x02,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xF6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xFC, 0xDD, 0xDE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
};
int makefile( int currrow, unsigned char a, unsigned char b)
{
int fid; char fn[16]; sprintf( fn, "%02d/%2X%2X", currrow, a, b);
fid = open( fn, O_RDWR | O_CREAT, 0644 );
if( fid == -1 ) {
fprintf( stderr, "Unable to open: %s\n", fn );
exit( 1 );
}
return fid;
}
int main( int args, char **argv )
{
int currrow = 1, inrow = 0, nowfd, use, mycount = 0;
unsigned long row;
static int fd[0x10000][17];
memset( fd, 0, sizeof(fd));
setvbuf( stdout, NULL, _IONBF, 0);
if( (args != 3) || ((row = atol(argv[1]))==0))
{
fprintf( stderr, "syntax: %s row toindex\n", *argv );
exit( 1 );
}
if( ( infile = open( argv[2], O_RDONLY ) ) == -1 )
{
fprintf( stderr, "Could not open file %s.\n", argv[2] );
exit( 1 );
}
getfilesize( infile, &infilesize );
buffer_init();
row = 1 << row;
use = row & 1;
while( 1 )
{
unsigned char a, b;
switch( a = inblock[inblockoffs++] )
{
case 0 :
currrow = 0;
if( inblockoffs > BUFSIZE - BUFLOW )
buffer_lowwatermark();
if( infilesize <= infileoffs + inblockoffs)
return 0;
if( !(mycount++ & 255) )
printf( "%cSo far: %010.6f%% (%010lu / %010lu)", 13, 100.00 * (double)(infileoffs+inblockoffs) / (double)infilesize, infileoffs+inblockoffs, infilesize );
// Fall through
case 1 :
use = (1<<currrow) & row; currrow++; inrow = 0;
break;
default :
if( use && ( (b = inblock[inblockoffs] ) > 1 ) )
{
if( !fd[ b | (a*256) ][currrow] )
nowfd = fd[ b | (a*256) ][currrow] = makefile( currrow, a, b);
else
nowfd = fd[ b | (a*256) ][currrow];
*(unsigned long*)(inblock+inblockoffs-4) = infileoffs + inblockoffs - 1 - inrow;
inblock[inblockoffs] = inrow++;
write( nowfd, inblock+inblockoffs-4, 16);
inblock[inblockoffs] = b;
break;
}
}
}
return 0;
}
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