feat(tree): added a simple function to save tree snapshots compressed to the disk

src/tree.c

@@ -231,3 +231,39 @@ void walk(const char* base, const char* base_rel, const char* rel, PathBuffer* p
 
     closedir(dir);
 }
+
+void save_tree(const char* path, PathBuffer* tree) {
+    char tmp[1024];
+    size_t offset = 0;
+
+    FILE* fp = fopen(path, "wb");
+    if (!fp) { perror("ERROR: cannot open path in save_tree!\n"); return; }
+
+    offset += snprintf(tmp, sizeof(tmp), "%zu:", tree->len);
+
+    for (size_t idx = 0; idx < tree->len; idx++) {
+        size_t remaining = sizeof(tmp) - offset;
+
+        int written = snprintf(tmp + offset, remaining, "%s:", tree->paths[idx]);
+        if (written < 0 || (size_t)written >= remaining) {
+            perror("ERROR: buffer overflow in save_tree!\n");
+            fclose(fp);
+            return;
+        }
+
+        offset += (size_t)written;
+    }
+
+    uLong originalLen = strlen(tmp) + 1;
+
+    uLong compressedLen = compressBound(originalLen);
+    Bytef compressed[compressedLen];
+ 
+    if (compress(compressed, &compressedLen, (const Bytef*)tmp, originalLen) != Z_OK) {
+        perror("ERROR: compression failed in save_tree!");
+        return;
+    }
+
+    fwrite(compressed, sizeof(Bytef), compressedLen, fp);
+    fclose(fp);
+}