init

hexdump.c

@@ -0,0 +1,46 @@
+//
+// Created by bruno on 6.2.2025.
+//
+
+#include "hexdump.h"
+#include <stdio.h>
+#include <ctype.h>
+#include <malloc.h>
+#include <stdint.h>
+#include <string.h>
+
+#define BYTES_PER_LINE 8  // Adjust for different widths
+
+
+char *hexdump_to_string(const unsigned char *data, uint32_t start, uint32_t end) {
+    if (start >= end) return NULL;  // Invalid range
+
+    // Estimate max output size: each line is approx. 80 chars
+    uint32_t estimated_size = ((end - start) / BYTES_PER_LINE + 1) * 60;
+
+    // Allocate memory for output string
+    char *output = malloc(estimated_size);
+    if (!output) return NULL;
+
+    uint32_t out_offset = 0; // Tracks position in output buffer
+
+    for (uint32_t i = start; i < end; i += BYTES_PER_LINE) {
+        // Print offset
+        out_offset += snprintf(output + out_offset, estimated_size - out_offset, "%07x   ", i);
+
+        // Print hex values
+        for (uint32_t j = 0; j < BYTES_PER_LINE; j++) {
+            if (i + j < end)
+                out_offset += snprintf(output + out_offset, estimated_size - out_offset, "%02x ", data[i + j]);
+            else
+                out_offset += snprintf(output + out_offset, estimated_size - out_offset, "   "); // Padding
+            if (j == 7)
+                out_offset += snprintf(output + out_offset, estimated_size - out_offset, " "); // Extra space
+        }
+
+        out_offset += snprintf(output + out_offset, estimated_size - out_offset, "\n");
+    }
+    out_offset += snprintf(output + out_offset, estimated_size - out_offset, "\n");
+
+    return output;
+}