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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* Contributors: Amorilia (amorilia@users.sourceforge.net)
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/imbuf/intern/dds/Stream.cpp
* \ingroup imbdds
*/
#include <Stream.h>
#include <stdio.h> // printf
#include <string.h> // memcpy
static const char *msg_error_seek = "DDS: trying to seek beyond end of stream (corrupt file?)";
static const char *msg_error_read = "DDS: trying to read beyond end of stream (corrupt file?)";
unsigned int Stream::seek(unsigned int p)
{
if (p > size) {
puts(msg_error_seek);
}
else {
pos = p;
}
return pos;
}
unsigned int mem_read(Stream & mem, unsigned long long & i)
{
if (mem.pos + 8 > mem.size) {
puts(msg_error_seek);
return(0);
}
memcpy(&i, mem.mem + mem.pos, 8); // @@ todo: make sure little endian
mem.pos += 8;
return(8);
}
unsigned int mem_read(Stream & mem, unsigned int & i)
{
if (mem.pos + 4 > mem.size) {
puts(msg_error_read);
return(0);
}
memcpy(&i, mem.mem + mem.pos, 4); // @@ todo: make sure little endian
mem.pos += 4;
return(4);
}
unsigned int mem_read(Stream & mem, unsigned short & i)
{
if (mem.pos + 2 > mem.size) {
puts(msg_error_read);
return(0);
}
memcpy(&i, mem.mem + mem.pos, 2); // @@ todo: make sure little endian
mem.pos += 2;
return(2);
}
unsigned int mem_read(Stream & mem, unsigned char & i)
{
if (mem.pos + 1 > mem.size) {
puts(msg_error_read);
return(0);
}
i = (mem.mem + mem.pos)[0];
mem.pos += 1;
return(1);
}
unsigned int mem_read(Stream & mem, unsigned char *i, unsigned int cnt)
{
if (mem.pos + cnt > mem.size) {
puts(msg_error_read);
return(0);
}
memcpy(i, mem.mem + mem.pos, cnt);
mem.pos += cnt;
return(cnt);
}
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