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/*
* Copyright 2021 Alyssa Rosenzweig
* SPDX-License-Identifier: MIT
*/
#ifndef U_HEXDUMP_H
#define U_HEXDUMP_H
#include <stdio.h>
#include <stdbool.h>
static inline void
u_hexdump(FILE *fp, const uint8_t *hex, size_t cnt, bool with_strings)
{
for (unsigned i = 0; i < cnt; ++i) {
if ((i & 0xF) == 0)
fprintf(fp, "%06X ", i);
uint8_t v = hex[i];
if (v == 0 && (i & 0xF) == 0) {
/* Check if we're starting an aligned run of zeroes */
unsigned zero_count = 0;
for (unsigned j = i; j < cnt; ++j) {
if (hex[j] == 0)
zero_count++;
else
break;
}
if (zero_count >= 32) {
fprintf(fp, "*\n");
i += (zero_count & ~0xF) - 1;
continue;
}
}
fprintf(fp, "%02X ", hex[i]);
if ((i & 0xF) == 0xF && with_strings) {
fprintf(fp, " | ");
for (unsigned j = i & ~0xF; j <= i; ++j) {
uint8_t c = hex[j];
fputc((c < 32 || c > 128) ? '.' : c, fp);
}
}
if ((i & 0xF) == 0xF)
fprintf(fp, "\n");
}
fprintf(fp, "\n");
}
#endif
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