mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-23 07:22:25 +00:00
53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
/*
|
|
* \brief Convert string to color
|
|
* \author Norman Feske
|
|
* \date 2013-01-04
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2012 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__NITPICKER_GFX__STRING_H_
|
|
#define _INCLUDE__NITPICKER_GFX__STRING_H_
|
|
|
|
/* Genode includes */
|
|
#include <util/string.h>
|
|
|
|
#include "nitpicker_gfx/color.h"
|
|
|
|
namespace Genode {
|
|
|
|
/**
|
|
* Convert ASCII string to Color
|
|
*
|
|
* The ASCII string must have the format '#rrggbb'
|
|
*
|
|
* \return number of consumed characters, or 0 if the string contains
|
|
* no valid color
|
|
*/
|
|
template <>
|
|
inline size_t ascii_to<Color>(const char *s, Color *result, unsigned)
|
|
{
|
|
/* validate string */
|
|
if (strlen(s) < 7 || *s != '#') return 0;
|
|
|
|
enum { HEX = true };
|
|
|
|
for (unsigned i = 0; i < 6; i++)
|
|
if (!is_digit(s[i + 1], HEX)) return 0;
|
|
|
|
int red = 16*digit(s[1], HEX) + digit(s[2], HEX),
|
|
green = 16*digit(s[3], HEX) + digit(s[4], HEX),
|
|
blue = 16*digit(s[5], HEX) + digit(s[6], HEX);
|
|
|
|
*result = Color(red, green, blue);
|
|
return 7;
|
|
}
|
|
}
|
|
|
|
#endif /* _INCLUDE__NITPICKER_GFX__STRING_H_ */
|