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decrypt_safe

caesar_cipher_enc_dec::caesar_cipher

Function decrypt_safe 

Source 
pub fn decrypt_safe(text: &str, shift: i16) -> Result<String, CipherError>
Expand description

Decrypts text using Caesar cipher with error handling

This function validates input values and returns an error for invalid inputs. Internally uses decrypt after validation, so fixes in decrypt are automatically reflected in this safe API.

§Arguments

  • text - Text to decrypt (must not be empty or whitespace-only)
  • shift - Shift value to use for decryption (must be in range -25 to 25)

§Returns

Decrypted text on success, CipherError on failure

§Errors

  • CipherError::EmptyText - When text is empty or whitespace-only
  • CipherError::InvalidShift - When shift value is out of range

§Examples

use caesar_cipher_enc_dec::caesar_cipher::decrypt_safe;

let result = decrypt_safe("Khoor", 3).unwrap();
assert_eq!(result, "Hello");