Module digit

Utilities to process digits.

This both contains routines to convert to and from digits, as well as iterate over digits while skipping digit separators.

Functions

char_is_digit

Determine if a character is a digit.

char_is_digit_const

Determine if a character is a digit with a radix known at compile time.

char_to_digit

Convert a character to a digit.

char_to_digit_const

Convert a character to a digit with a radix known at compile time.

char_to_valid_digit_const

Unchecked, highly optimized algorithm to convert a char to a digit. This only works if the input character is known to be a valid digit.

digit_to_char

Convert a digit to a character. This uses a pre-computed table to avoid branching.

digit_to_char_const

Convert a digit to a character with a radix known at compile time.