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/*
* Copyright (C) 2007-2009 by the Widelands Development Team
*
* 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 "io/streamread.h"
#include <cassert>
#include <cstdarg>
#include <cstdio>
#include "base/wexception.h"
StreamRead::~StreamRead() {
}
StreamRead::DataError::DataError(char const* const fmt, ...) {
char buffer[256];
{
va_list va;
va_start(va, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, va);
va_end(va);
}
what_ += buffer;
}
/**
* Read a number of bytes from the stream.
*
* If the requested number of bytes couldn't be read, this function
* fails by throwing an exception.
*/
void StreamRead::data_complete(void* const read_data, const size_t size) {
size_t read = data(read_data, size);
if (read != size)
throw data_error("Stream ended unexpectedly (%lu bytes read, %lu expected)",
static_cast<long unsigned int>(read), static_cast<long unsigned int>(size));
}
int8_t StreamRead::signed_8() {
int8_t x;
data_complete(&x, 1);
return x;
}
uint8_t StreamRead::unsigned_8() {
uint8_t x;
data_complete(&x, 1);
return x;
}
int16_t StreamRead::signed_16() {
int16_t x;
data_complete(&x, 2);
return little_16(x);
}
uint16_t StreamRead::unsigned_16() {
uint16_t x;
data_complete(&x, 2);
return little_16(x);
}
int32_t StreamRead::signed_32() {
int32_t x;
data_complete(&x, 4);
return little_32(x);
}
uint32_t StreamRead::unsigned_32() {
uint32_t x;
data_complete(&x, 4);
return little_32(x);
}
std::string StreamRead::string() {
std::string x;
char ch;
for (;;) {
data_complete(&ch, 1);
if (ch == 0)
break;
x += ch;
}
return x;
}
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