DCL
text/plain
Magic Bytes
Offset: 0
54 68 69 73 20 69 73 20 54 65 58 2C
The DCL file format is a specialized data resource for the TeX typesetting system, which was originally developed by Donald Knuth. These files function as precompiled macro collections or memory dumps used to speed up the initialization of document rendering engines. Although considered safe for processing, the format is largely legacy and architecture-dependent, often requiring regeneration from source code when moving between different operating systems or modern TeX distributions.
Validation Code
How to validate .dcl files in Python
Python
def is_dcl(file_path: str) -> bool:
"""Check if file is a valid DCL by magic bytes."""
signature = bytes([0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C])
with open(file_path, "rb") as f:
return f.read(12) == signatureHow to validate .dcl files in Node.js
Node.js
function isDCL(buffer: Buffer): boolean {
const signature = Buffer.from([0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C]);
return buffer.subarray(0, 12).equals(signature);
}
Go
func IsDCL(data []byte) bool {
signature := []byte{0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C}
if len(data) < 12 {
return false
}
return bytes.Equal(data[:12], signature)
}API Endpoint
GET
/api/v1/dcl
curl https://filesignature.org/api/v1/dcl