61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
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* this notice you can do whatever you want with this stuff. If we meet some day,
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* and you think this stuff is worth it, you can buy me a beer in return.
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* ----------------------------------------------------------------------------
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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void hexdump (void *addr, int len) {
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int i;
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unsigned char buff[17];
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unsigned char *pc = (unsigned char*)addr;
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if (len == 0) {
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printf(" ZERO LENGTH\n");
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return;
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}
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if (len < 0) {
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printf(" NEGATIVE LENGTH: %i\n",len);
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return;
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}
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// Process every byte in the data.
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for (i = 0; i < len; i++) {
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// Multiple of 16 means new line (with line offset).
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if ((i % 16) == 0) {
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// Just don't print ASCII for the zeroth line.
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if (i != 0)
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printf (" %s\n", buff);
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// Output the offset.
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printf (" %04x ", i);
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}
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// Now the hex code for the specific character.
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printf (" %02x", pc[i]);
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// And store a printable ASCII character for later.
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if ((pc[i] < 0x20) || (pc[i] > 0x7e))
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buff[i % 16] = '.';
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else
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buff[i % 16] = pc[i];
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buff[(i % 16) + 1] = '\0';
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}
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// Pad out last line if not exactly 16 characters.
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while ((i % 16) != 0) {
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printf (" ");
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i++;
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}
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// And print the final ASCII bit.
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printf (" %s\n", buff);
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}
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