/**
 ** tmpbuff.c ---- temporary buffer support
 **
 ** Copyright (c) 1998 Hartmut Schirmer
 **
 ** This file is part of the GRX graphics library.
 **
 ** The GRX graphics library is free software; you can redistribute it
 ** and/or modify it under some conditions; see the "copying.grx" file
 ** for details.
 **
 ** 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.
 **
 **/

#include "libgrx.h"
#include "allocate.h"

void *_GrTempBuffer = NULL;
unsigned _GrTempBufferBytes = 0;

void *_GrTempBufferAlloc_(size_t bytes) {
    GRX_ENTER();
    if (bytes > _GrTempBufferBytes || _GrTempBuffer == NULL) {
        void *neu = realloc(_GrTempBuffer, bytes);
        if (neu) {
        _GrTempBuffer = neu;
        _GrTempBufferBytes = bytes;
        }
    }
    GRX_RETURN( (bytes<=_GrTempBufferBytes && _GrTempBuffer) ? _GrTempBuffer : NULL);
}

void _GrTempBufferFree(void) {
    if (_GrTempBuffer) free(_GrTempBuffer);
    _GrTempBuffer = NULL;
    _GrTempBufferBytes = 0;
}