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/*
Copyright (C) 2001 by Martin Geisse <mgeisse@gmx.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "cssysdef.h"
#include "csutil/datastrm.h"
#include <ctype.h>
csDataStream::csDataStream (void *buf, int n, bool del) :
Data ((uint8*)buf), Position (0), Size (n), DeleteBuffer (del)
{
}
csDataStream::~csDataStream ()
{
if (DeleteBuffer)
delete[] Data;
}
int csDataStream::GetPosition ()
{
return Position;
}
void csDataStream::SetPosition (int pos)
{
Position = pos;
}
int csDataStream::GetLength ()
{
return Size;
}
bool csDataStream::Finished ()
{
return (Position == Size);
}
void csDataStream::Skip (int num)
{
Position += num;
if (Position > Size) Position = Size;
}
int csDataStream::Read (void *buf, int n)
{
if (Position + n > Size)
n = Size - Position;
memcpy (buf, Data + Position, n);
Position += n;
return n;
}
#define IMPLEMENT_READ_INT(name,type) \
bool csDataStream::name (type &var) \
{ \
return (Read (&var, sizeof(type)) == sizeof(type)); \
}
IMPLEMENT_READ_INT (ReadInt8, int8);
IMPLEMENT_READ_INT (ReadUInt8, uint8);
IMPLEMENT_READ_INT (ReadInt16, int16);
IMPLEMENT_READ_INT (ReadUInt16, uint16);
IMPLEMENT_READ_INT (ReadInt32, int32);
IMPLEMENT_READ_INT (ReadUInt32, uint32);
int csDataStream::GetChar ()
{
char val;
if (Read (&val, sizeof(char)) < (int)sizeof(char))
return EOF;
return val;
}
int csDataStream::LookChar ()
{
int OldPosition = Position;
int Result = GetChar ();
Position = OldPosition;
return Result;
}
bool csDataStream::GetString (char* buf, int len, bool OmitNewline)
{
// test for EOF
if (Position == Size) return false;
// find the end of the current line
char *String = (char*)(Data+Position);
char *FirstNewline = strchr (String, '\n');
// look if there are now more lines
if (!FirstNewline)
{
len = Read (buf, len - 1);
buf [len - 1] = 0;
return true;
}
// calculate the length of the line including the newline character
int LineLen = FirstNewline - String + 1;
// truncate buffer length if greater than length of the line
// (+1 for the null character)
if (len > LineLen + 1) len = LineLen + 1;
// read the line
Read (buf, len - 1);
buf [len - 1] = 0;
// look for the newline character
if ((buf [len-2] == '\n') && OmitNewline) buf [len-2] = 0;
return true;
}
int csDataStream::ReadTextInt ()
{
int Value, Length;
if (sscanf ((char*)(Data+Position), "%d%n", &Value, &Length) != 1)
{
Position = Size;
return 0;
}
else
{
Position += Length;
return Value;
}
}
float csDataStream::ReadTextFloat ()
{
float Value;
int Length;
if (sscanf ((char*)(Data+Position), "%f%n", &Value, &Length) != 1)
{
Position = Size;
return 0;
}
else
{
Position += Length;
return Value;
}
}
void csDataStream::SkipWhitespace ()
{
while (Position < Size && isspace (Data[Position]))
Position++;
}
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