HexHelpers.h

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#pragma once
 
/*!********************************************************************
 
 Audacity: A Digital Audio Editor
 
 @file HexHelpers.h
 @brief Define helper functions for hex-to-num conversion.
 
 Dmitry Vedenko
 **********************************************************************/
 
#include <cstdint>
#include <cassert>
#include <cctype>
 
namespace audacity
{
 
inline uint8_t HexCharToNum (char c) noexcept
{
    assert (std::isxdigit (c) != 0);
 
    if ('0' <= c && c <= '9')
        return c - '0';
    else if ('A' <= c && c <= 'F')
        return c - 'A' + 10;
    else if ('a' <= c && c <= 'f')
        return c - 'a' + 10;
 
    return 0;
}
 
}