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gex-core/utils/hexdump.c

61 lines
1.5 KiB

7 years ago
//
// Created by MightyPork on 2017/12/04.
//
#include "platform.h"
#include "hexdump.h"
void hexDump(const char *restrict desc, const void *restrict addr, uint32_t len)
{
uint32_t i;
uint8_t buff[17];
uint8_t *pc = (unsigned char*)addr;
// Output description if given.
if (desc != NULL)
PRINTF ("%s:\r\n", desc);
if (len == 0) {
PUTS(" ZERO LENGTH\r\n");
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return;
}
// Process every byte in the data.
for (i = 0; i < len; i++) {
// Multiple of 16 means new line (with line offset).
if ((i % 16) == 0) {
// Just don't print ASCII for the zeroth line.
if (i != 0) {
PUTS(" ");
PUTS((const char *) buff);
PUTS("\r\n");
}
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// Output the offset.
PRINTF (" %04"PRIx32" ", i);
}
// Now the hex code for the specific character.
PRINTF (" %02x", pc[i]);
// And store a printable ASCII character for later.
if ((pc[i] < 0x20) || (pc[i] > 0x7e))
buff[i % 16] = (uint8_t) ((pc[i] == 0xA5) ? ' ' : '.'); // special treatment for 0xA5 which is used as a filler in stacks
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else
buff[i % 16] = pc[i];
buff[(i % 16) + 1] = '\0';
}
// Pad out last line if not exactly 16 characters.
while ((i % 16) != 0) {
PUTS(" ");
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i++;
}
// And print the final ASCII bit.
PRINTF (" %s\r\n", buff);
(void)buff;
}