nymiro
47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
import os
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from pathlib import Path
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ROOT_DIR = Path(__file__).resolve().parents[1]
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DEFAULT_EXAMPLE = ROOT_DIR / "examples" / "samsung_apple_compatible.HEIC"
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# --- Hex Dump Utility ---
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def hexdump(data, length=16):
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"""Creates a formatted hex dump of a byte string."""
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results = []
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for i in range(0, len(data), length):
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chunk = data[i:i + length]
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# 1. Offset
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offset = f"{i:08x} "
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# 2. Hex values
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hex_part = " ".join(f"{b:02x}" for b in chunk)
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hex_part = hex_part.ljust(length * 3 - 1) # Pad to align
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# 3. ASCII representation
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ascii_part = "".join(chr(b) if 32 <= b <= 126 else "." for b in chunk)
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results.append(f"{offset}{hex_part} |{ascii_part}|")
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return "\n".join(results)
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# --- End Utility ---
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filename = os.environ.get("HEIC_SAMPLE", str(DEFAULT_EXAMPLE))
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if not os.path.exists(filename):
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print(f"Error: File not found: {filename}")
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print("Set HEIC_SAMPLE environment variable or place the sample under examples/.")
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else:
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try:
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with open(filename, 'rb') as f:
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# Read the first 512 bytes (enough to see the ftyp and meta headers)
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file_header_data = f.read(512)
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print(f"--- Hex Dump for {filename} (First 512 Bytes) ---")
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print(hexdump(file_header_data))
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print("="*60)
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except Exception as e:
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print(f"An error occurred while reading the file: {e}")
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