solidity/liblangutil/Common.h

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2019-02-21 00:04:34 +00:00
/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
namespace langutil
{
inline bool isDecimalDigit(char c)
{
return '0' <= c && c <= '9';
}
inline bool isHexDigit(char c)
{
return
isDecimalDigit(c) ||
('a' <= c && c <= 'f') ||
('A' <= c && c <= 'F');
}
inline bool isWhiteSpace(char c)
{
return c == ' ' || c == '\n' || c == '\t' || c == '\r';
}
inline bool isIdentifierStart(char c)
{
return c == '_' || c == '$' || ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
}
inline bool isIdentifierPart(char c)
{
return isIdentifierStart(c) || isDecimalDigit(c);
}
inline int hexValue(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
else if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
else if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
else return -1;
}
}