Wed, 05 Aug 2009 17:32:05 +0100
updated README
| philpem@0 | 1 | #include <stdio.h> |
| philpem@0 | 2 | #include <ctype.h> |
| philpem@0 | 3 | #include <string.h> |
| philpem@0 | 4 | |
| philpem@0 | 5 | void hex_dump(void *data, int size) |
| philpem@0 | 6 | { |
| philpem@0 | 7 | /* dumps size bytes of *data to stdout. Looks like: |
| philpem@0 | 8 | * [0000] 75 6E 6B 6E 6F 77 6E 20 |
| philpem@0 | 9 | * 30 FF 00 00 00 00 39 00 unknown 0.....9. |
| philpem@0 | 10 | * (in a single line of course) |
| philpem@0 | 11 | */ |
| philpem@0 | 12 | |
| philpem@0 | 13 | unsigned char *p = data; |
| philpem@12 | 14 | unsigned long addr = 0; |
| philpem@0 | 15 | unsigned char c; |
| philpem@0 | 16 | int n; |
| philpem@0 | 17 | char bytestr[4] = {0}; |
| philpem@0 | 18 | char addrstr[10] = {0}; |
| philpem@0 | 19 | char hexstr[ 16*3 + 5] = {0}; |
| philpem@0 | 20 | char charstr[16*1 + 5] = {0}; |
| philpem@0 | 21 | for(n=1;n<=size;n++) { |
| philpem@0 | 22 | if (n%16 == 1) { |
| philpem@0 | 23 | /* store address for this line */ |
| philpem@12 | 24 | snprintf(addrstr, sizeof(addrstr), "%.4lX", |
| philpem@12 | 25 | addr); |
| philpem@0 | 26 | } |
| philpem@0 | 27 | |
| philpem@0 | 28 | c = *p; |
| philpem@0 | 29 | if (isalnum(c) == 0) { |
| philpem@0 | 30 | c = '.'; |
| philpem@0 | 31 | } |
| philpem@0 | 32 | |
| philpem@0 | 33 | /* store hex str (for left side) */ |
| philpem@0 | 34 | snprintf(bytestr, sizeof(bytestr), "%02X ", *p); |
| philpem@0 | 35 | strncat(hexstr, bytestr, sizeof(hexstr)-strlen(hexstr)-1); |
| philpem@0 | 36 | |
| philpem@0 | 37 | /* store char str (for right side) */ |
| philpem@0 | 38 | snprintf(bytestr, sizeof(bytestr), "%c", c); |
| philpem@0 | 39 | strncat(charstr, bytestr, sizeof(charstr)-strlen(charstr)-1); |
| philpem@0 | 40 | |
| philpem@0 | 41 | if(n%16 == 0) { |
| philpem@0 | 42 | /* line completed */ |
| philpem@0 | 43 | printf("[%4.4s] %-50.50s %s\n", addrstr, hexstr, charstr); |
| philpem@0 | 44 | hexstr[0] = 0; |
| philpem@0 | 45 | charstr[0] = 0; |
| philpem@0 | 46 | } else if(n%8 == 0) { |
| philpem@0 | 47 | /* half line: add whitespaces */ |
| philpem@0 | 48 | strncat(hexstr, " ", sizeof(hexstr)-strlen(hexstr)-1); |
| philpem@0 | 49 | strncat(charstr, " ", sizeof(charstr)-strlen(charstr)-1); |
| philpem@0 | 50 | } |
| philpem@0 | 51 | p++; /* next byte */ |
| philpem@12 | 52 | addr++; /* increment address */ |
| philpem@0 | 53 | } |
| philpem@0 | 54 | |
| philpem@0 | 55 | if (strlen(hexstr) > 0) { |
| philpem@0 | 56 | /* print rest of buffer if not empty */ |
| philpem@0 | 57 | printf("[%4.4s] %-50.50s %s\n", addrstr, hexstr, charstr); |
| philpem@0 | 58 | } |
| philpem@0 | 59 | } |
| philpem@0 | 60 |