Function decode_binary_int_fast 

pub fn decode_binary_int_fast(
    data: &[u8],
    bits: u16,
    signed: bool,
) -> Result<i64>

Decode a COBOL binary integer (USAGE BINARY / COMP) with optimized fast paths for 16-, 32-, and 64-bit widths.

For the three common widths this function reads the big-endian bytes directly into the native integer type, avoiding the generic loop in decode_binary_int. Uncommon widths fall back to that generic implementation.

Arguments

• data - Raw big-endian byte data containing the binary integer
• bits - Expected field width in bits (16, 32, or 64 for fast path)
• signed - Whether the field is signed (PIC S9 COMP) or unsigned (PIC 9 COMP)

Returns

The decoded integer value as i64.

Errors

• CBKD401_COMP3_INVALID_NIBBLE - if an unsigned 64-bit value exceeds i64::MAX
• Delegates to decode_binary_int for unsupported widths, which may return its own errors.

See Also

• decode_binary_int - General-purpose binary integer decoder
• encode_binary_int - Binary integer encoder
• format_binary_int_to_string_with_scratch - Formats the decoded value to a string