39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
#include "stdio.h"
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#include <ctype.h>
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#include "hexdump.h"
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void hexdump (const char *label, const uint8_t *data, size_t len) {
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if (label)
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printf ("%s (len=%u):\n", label, len);
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for (size_t i = 0; i < len; i += 16) {
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printf ("%04u ", i); // offset
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for (size_t j = 0; j < 16; j++) {
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if (i + j < len)
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printf ("%02X ", data[i + j]);
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else
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printf (" "); // pad spacing
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}
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printf (" ");
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for (size_t j = 0; j < 16 && i + j < len; j++) {
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uint8_t c = data[i + j];
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printf ("%c", isprint (c) ? c : '.');
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}
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printf ("\n");
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}
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}
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void hexdump_compact(const uint8_t* data, size_t len, char* out, size_t out_size) {
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size_t pos = 0;
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for (size_t i = 0; i < len; i++) {
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if (pos + 2 >= out_size) break; // make sure we don¡¯t overflow
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snprintf(out + pos, 3, "%02x", data[i]); // 2 chars + null terminator
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pos += 2;
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}
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if (pos < out_size)
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out[pos] = '\0';
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else
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out[out_size - 1] = '\0'; // ensure null termination
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} |