Return the decimal value of a hex character
Synopsis
Declared in header <boost/url/grammar/hexdig_chars.hpp>
signed char
hexdig_value(char ch) noexcept;
Description
This function returns the decimal value of a hexadecimal character, or -1 if the argument is not a valid hexadecimal digit.
BNF
HEXDIG = DIGIT
/ "A" / "B" / "C" / "D" / "E" / "F"
/ "a" / "b" / "c" / "d" / "e" / "f"
Return Value
The decimal value or -1
Parameters
Name | Description |
---|---|
ch |
The character to check |