1 /*
2 * Copyright 2021 Alyssa Rosenzweig
3 * SPDX-License-Identifier: MIT
4 */
5
6 #ifndef U_HEXDUMP_H
7 #define U_HEXDUMP_H
8
9 #include <stdio.h>
10 #include <stdbool.h>
11
12 static inline void
u_hexdump(FILE * fp,const uint8_t * hex,size_t cnt,bool with_strings)13 u_hexdump(FILE *fp, const uint8_t *hex, size_t cnt, bool with_strings)
14 {
15 for (unsigned i = 0; i < cnt; ++i) {
16 if ((i & 0xF) == 0 && i >= 0x10) {
17 unsigned j;
18
19 for (j = i; j + 0x10 < cnt; j += 0x10) {
20 if (memcmp(&hex[j], &hex[j - 0x10], 0x10))
21 break;
22 }
23
24 if (j > i) {
25 fprintf(fp, "*\n");
26 i = j - 1;
27 continue;
28 }
29 }
30
31 if ((i & 0xF) == 0)
32 fprintf(fp, "%06X ", i);
33
34 fprintf(fp, "%02X ", hex[i]);
35 if ((i & 0xF) == 0xF && with_strings) {
36 fprintf(fp, " | ");
37 for (unsigned j = i & ~0xF; j <= i; ++j) {
38 uint8_t c = hex[j];
39 fputc((c < 32 || c > 128) ? '.' : c, fp);
40 }
41 }
42
43 if ((i & 0xF) == 0xF)
44 fprintf(fp, "\n");
45 }
46
47 fprintf(fp, "\n");
48 }
49
50 #endif
51