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/*
* Copyright (C) 2011-2017 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CHAR_UTIL_HXX
#define CHAR_UTIL_HXX
#ifdef _UNICODE
#include "WCharUtil.hxx"
#endif
constexpr bool
IsASCII(const unsigned char ch)
{
return ch < 0x80;
}
constexpr bool
IsASCII(const char ch)
{
return IsASCII((unsigned char)ch);
}
constexpr bool
IsWhitespaceOrNull(const char ch)
{
return (unsigned char)ch <= 0x20;
}
constexpr bool
IsWhitespaceNotNull(const char ch)
{
return ch > 0 && ch <= 0x20;
}
/**
* Is the given character whitespace? This calls the faster one of
* IsWhitespaceOrNull() or IsWhitespaceNotNull(). Use this if you
* want the fastest implementation, and you don't care if a null byte
* matches.
*/
constexpr bool
IsWhitespaceFast(const char ch)
{
return IsWhitespaceOrNull(ch);
}
constexpr bool
IsPrintableASCII(char ch)
{
return (signed char)ch >= 0x20;
}
constexpr bool
IsDigitASCII(char ch)
{
return ch >= '0' && ch <= '9';
}
constexpr bool
IsUpperAlphaASCII(char ch)
{
return ch >= 'A' && ch <= 'Z';
}
constexpr bool
IsLowerAlphaASCII(char ch)
{
return ch >= 'a' && ch <= 'z';
}
constexpr bool
IsAlphaASCII(char ch)
{
return IsUpperAlphaASCII(ch) || IsLowerAlphaASCII(ch);
}
constexpr bool
IsAlphaNumericASCII(char ch)
{
return IsAlphaASCII(ch) || IsDigitASCII(ch);
}
/**
* Convert the specified ASCII character (0x00..0x7f) to upper case.
* Unlike toupper(), it ignores the system locale.
*/
constexpr char
ToUpperASCII(char ch)
{
return ch >= 'a' && ch <= 'z'
? (ch - ('a' - 'A'))
: ch;
}
/**
* Convert the specified ASCII character (0x00..0x7f) to lower case.
* Unlike tolower(), it ignores the system locale.
*/
constexpr char
ToLowerASCII(char ch)
{
return ch >= 'A' && ch <= 'Z'
? (ch + ('a' - 'A'))
: ch;
}
#endif
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