z230

24 ULOŽENÍ A slepení2.PY

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+import os
+import re
+
+# ================= CONFIG =================
+PARTS_DIR = r"downloads/PC_Pro_2011-07"
+OUTPUT_DIR = r"downloads"
+# ==========================================
+
+ybegin_re = re.compile(r"size=(\d+)")
+name_re   = re.compile(r"name=(.+)")
+ypart_re  = re.compile(r"begin=(\d+)\s+end=(\d+)")
+
+parts = []
+total_size = None
+final_name = None
+
+# --- 1. načti všechny yEnc hlavičky ---
+for fname in os.listdir(PARTS_DIR):
+    if not fname.endswith(".yEncHeader"):
+        continue
+
+    part_id = fname.replace(".yEncHeader", "")
+    hdr_path = os.path.join(PARTS_DIR, fname)
+    bin_path = os.path.join(PARTS_DIR, f"{part_id}.bin")
+
+    if not os.path.exists(bin_path):
+        raise RuntimeError(f"Missing bin file for {fname}")
+
+    with open(hdr_path, "r", encoding="utf-8", errors="replace") as f:
+        lines = f.read().splitlines()
+
+    begin = end = None
+
+    for line in lines:
+        if line.startswith("=ybegin"):
+            if total_size is None:
+                m = ybegin_re.search(line)
+                if m:
+                    total_size = int(m.group(1))
+                m = name_re.search(line)
+                if m:
+                    final_name = m.group(1)
+
+        if line.startswith("=ypart"):
+            m = ypart_re.search(line)
+            if not m:
+                raise RuntimeError(f"Cannot parse ypart in {fname}")
+            begin = int(m.group(1))
+            end   = int(m.group(2))
+
+    if begin is None or end is None:
+        raise RuntimeError(f"Missing begin/end in {fname}")
+
+    parts.append({
+        "bin": bin_path,
+        "begin": begin,
+        "end": end
+    })
+
+# --- sanity checks ---
+if total_size is None or final_name is None:
+    raise RuntimeError("Missing ybegin info (size/name)")
+
+output_path = os.path.join(OUTPUT_DIR, final_name)
+
+print(f"📄 Final file: {output_path}")
+print(f"📦 Total size: {total_size} bytes")
+print(f"🧩 Parts: {len(parts)}")
+
+# --- 2. alokuj cílový soubor ---
+with open(output_path, "wb") as f:
+    f.truncate(total_size)
+
+# --- 3. zapiš jednotlivé části na správné offsety ---
+with open(output_path, "r+b") as out:
+    for p in parts:
+        expected_len = p["end"] - p["begin"] + 1
+
+        with open(p["bin"], "rb") as bf:
+            data = bf.read()
+
+        if len(data) != expected_len:
+            print(
+                f"⚠️  Size mismatch in {os.path.basename(p['bin'])}: "
+                f"expected {expected_len}, got {len(data)}"
+            )
+
+        # kratší data jsou OK (CRC, padding, end-of-part)
+
+        out.seek(p["begin"] - 1)  # yEnc je 1-based
+        out.write(data)
+
+print("🎉 DONE – file assembled correctly")