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#include <stdio.h> | |
#include <ctype.h> | |
#ifndef HEXDUMP_COLS | |
#define HEXDUMP_COLS 16 | |
#endif | |
void hexdump(void *mem, unsigned int len) | |
{ | |
unsigned int i, j; | |
for(i = 0; i < len + ((len % HEXDUMP_COLS) ? (HEXDUMP_COLS - len % HEXDUMP_COLS) : 0); i++) | |
{ | |
/* print offset */ | |
if(i % HEXDUMP_COLS == 0) | |
{ | |
printf("0x%06x: ", i); | |
} | |
/* print hex data */ | |
if(i < len) | |
{ | |
printf("%02x ", 0xFF & ((char*)mem)[i]); | |
} | |
else /* end of block, just aligning for ASCII dump */ | |
{ | |
printf(" "); | |
} | |
/* print ASCII dump */ | |
if(i % HEXDUMP_COLS == (HEXDUMP_COLS - 1)) | |
{ | |
for(j = i - (HEXDUMP_COLS - 1); j <= i; j++) | |
{ | |
if(j >= len) /* end of block, not really printing */ | |
{ | |
putchar(' '); | |
} | |
else if(isprint(((char*)mem)[j])) /* printable char */ | |
{ | |
putchar(0xFF & ((char*)mem)[j]); | |
} | |
else /* other char */ | |
{ | |
putchar('.'); | |
} | |
} | |
putchar('\n'); | |
} | |
} | |
} | |
#ifdef HEXDUMP_TEST | |
int main(int argc, char *argv[]) | |
{ | |
hexdump(argv[0], 20); | |
return 0; | |
} | |
#endif |
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