cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Include UTF8 helpers in libdevcore

Browse Source
This commit is contained in:
Alex Beregszaszi 2016-08-05 10:56:59 +01:00
parent bf76321c9e
commit 7945f41ccc
2 changed files with 126 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
libdevcore/UTF8.cpp Normal file
View File

@ -0,0 +1,86 @@
/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file UTF8.cpp
* @author Alex Beregszaszi
* @date 2016
*
* UTF-8 related helpers
*/
#include "UTF8.h"
namespace dev
{
namespace utf8
{
bool validate(std::string input, int &invalidPosition)
{
const int length = input.length();
bool valid = true;
int i = 0;
for (; i < length; i++)
{
if ((unsigned char)input[i] < 0x80)
continue;
int count = 0;
switch(input[i] & 0xe0) {
case 0xc0: count = 1; break;
case 0xe0: count = 2; break;
case 0xf0: count = 3; break;
default: break;
}
if (count == 0)
{
valid = false;
break;
}
if ((i + count) >= length)
{
valid = false;
break;
}
for (int j = 0; j < count; j++)
{
i++;
if ((input[i] & 0xc0) != 0x80)
{
valid = false;
break;
}
}
}
if (valid)
return true;
invalidPosition = i;
return false;
}
}
}

40
libdevcore/UTF8.h Normal file
View File

@ -0,0 +1,40 @@
/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file UTF8.h
* @author Alex Beregszaszi
* @date 2016
*
* UTF-8 related helpers
*/
#pragma once
#include <string>
namespace dev
{
namespace utf8
{
/// Validate an input for UTF8 encoding
/// @returns true if it is invalid and the first invalid position in invalidPosition
bool validate(std::string input, int &invalidPosition);
}
}