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/*
* Copyright 2003-2019 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "Parser.hxx"
#include "util/RuntimeError.hxx"
#include "util/StringStrip.hxx"
#include "util/StringUtil.hxx"
bool
ParseBool(const char *value)
{
static const char *const t[] = { "yes", "true", "1", nullptr };
static const char *const f[] = { "no", "false", "0", nullptr };
if (StringArrayContainsCase(t, value))
return true;
if (StringArrayContainsCase(f, value))
return false;
throw FormatRuntimeError("Not a valid boolean (\"yes\" or \"no\"): \"%s\"", value);
}
template<size_t OPERAND>
static size_t
Multiply(size_t value)
{
static constexpr size_t MAX_VALUE = SIZE_MAX / OPERAND;
if (value > MAX_VALUE)
throw std::runtime_error("Value too large");
return value * OPERAND;
}
size_t
ParseSize(const char *s, size_t default_factor)
{
char *endptr;
size_t value = strtoul(s, &endptr, 10);
if (endptr == s)
throw std::runtime_error("Failed to parse integer");
static constexpr size_t KILO = 1024;
static constexpr size_t MEGA = 1024 * KILO;
static constexpr size_t GIGA = 1024 * MEGA;
s = StripLeft(endptr);
bool apply_factor = false;
switch (*s) {
case 'k':
value = Multiply<KILO>(value);
++s;
break;
case 'M':
value = Multiply<MEGA>(value);
++s;
break;
case 'G':
value = Multiply<GIGA>(value);
++s;
break;
case '\0':
apply_factor = true;
break;
default:
throw std::runtime_error("Unknown size suffix");
}
/* ignore 'B' for "byte" */
if (*s == 'B') {
apply_factor = false;
++s;
}
if (*s != '\0')
throw std::runtime_error("Unknown size suffix");
if (apply_factor)
value *= default_factor;
return value;
}