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#include <stdio.h>
#include <ctype.h>
int lastnum[16] = { -1 };
long lastaddr = -1;
main(argc, argv)
int argc;
char ** argv;
{
FILE * fd;
int j, ch;
char buf[20];
int num[16];
long offset = 0;
#ifndef MSDOS
if( argc == 1 )
{
fd = stdin;
}
else
#endif
{
if( argc == 3 ) offset = strtol(argv[2], (char*)0, 16);
else if( argc != 2 )
{
fprintf(stderr, "Usage: hd file [hexoffset]\n");
exit(1);
}
fd = fopen(argv[1], "rb");
if( fd == 0 )
{
fprintf(stderr, "Cannot open file '%s'\n", argv[1]);
exit(1);
}
}
/* if( offset ) fseek(fd, offset, 0); */
for(ch=0; ch!=EOF; offset+=16)
{
memset(buf, '\0', 16);
for(j=0; j<16; j++) num[j] = -1;
for(j=0; j<16; j++)
{
ch = fgetc(fd);
if( ch == EOF ) break;
num[j] = ch;
if( isascii(ch) && isprint(ch) ) buf[j] = ch;
else buf[j] = '.';
}
printline(offset, num, buf, ch==EOF);
}
fclose(fd);
}
printline(address, num, chr, eofflag)
long address;
int * num;
char * chr;
int eofflag;
{
int j;
if( lastaddr >= 0 )
{
for(j=0; j<16; j++)
if( num[j] != lastnum[j] )
break;
if( j == 16 && !eofflag ) return;
if( lastaddr+16 != address )
printf("*\n");
}
lastaddr = address;
printf("%06lx:", address);
for(j=0; j<16; j++)
{
if( num[j] >= 0 )
printf(" %02x", num[j]);
else
printf(" ");
lastnum[j] = num[j];
num[j] = -1;
}
printf(" %.16s\n", chr);
}
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