Initial commit: client source

2026-08-17 20:03:02 +02:00
commit 9ae37cd0ea
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+/* alloc.c -- memory allocation
+
+   This file is part of the LZO real-time data compression library.
+
+   Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
+   All Rights Reserved.
+
+   The LZO library 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.
+
+   The LZO 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with the LZO library; see the file COPYING.
+   If not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+   Markus F.X.J. Oberhumer
+   <markus@oberhumer.com>
+ */
+
+#include "stdafx.h"
+#include "lzo_conf.h"
+#include <lzoutil.h>
+
+#if defined(HAVE_MALLOC_H)
+#  include <malloc.h>
+#endif
+#if defined(__palmos__)
+#  include <System/MemoryMgr.h>
+#endif
+
+
+#undef lzo_alloc_hook
+#undef lzo_free_hook
+#undef lzo_alloc
+#undef lzo_malloc
+#undef lzo_free
+
+
+/***********************************************************************
+// implementation
+************************************************************************/
+
+LZO_PRIVATE(lzo_voidp)
+lzo_alloc_internal(lzo_uint nelems, lzo_uint size)
+{
+	lzo_voidp p = NULL;
+	unsigned long s = (unsigned long) nelems * size;
+
+	if (nelems <= 0 || size <= 0 || s < nelems || s < size)
+		return NULL;
+
+#if defined(__palmos__)
+	p = (lzo_voidp) MemPtrNew(s);
+#elif (LZO_UINT_MAX <= SIZE_T_MAX)
+	if (s < SIZE_T_MAX)
+		p = (lzo_voidp) malloc((size_t)s);
+#elif defined(HAVE_HALLOC) && defined(__DMC__)
+	if (size < SIZE_T_MAX)
+		p = (lzo_voidp) _halloc(nelems,(size_t)size);
+#elif defined(HAVE_HALLOC)
+	if (size < SIZE_T_MAX)
+		p = (lzo_voidp) halloc(nelems,(size_t)size);
+#else
+	if (s < SIZE_T_MAX)
+		p = (lzo_voidp) malloc((size_t)s);
+#endif
+
+	return p;
+}
+
+
+LZO_PRIVATE(void)
+lzo_free_internal(lzo_voidp p)
+{
+	if (!p)
+		return;
+
+#if defined(__palmos__)
+	MemPtrFree(p);
+#elif (LZO_UINT_MAX <= SIZE_T_MAX)
+	free(p);
+#elif defined(HAVE_HALLOC) && defined(__DMC__)
+	_hfree(p);
+#elif defined(HAVE_HALLOC)
+	hfree(p);
+#else
+	free(p);
+#endif
+}
+
+
+/***********************************************************************
+// public interface using the global hooks
+************************************************************************/
+
+/* global allocator hooks */
+LZO_PUBLIC_VAR(lzo_alloc_hook_t) lzo_alloc_hook = lzo_alloc_internal;
+LZO_PUBLIC_VAR(lzo_free_hook_t) lzo_free_hook = lzo_free_internal;
+
+
+LZO_PUBLIC(lzo_voidp)
+lzo_alloc(lzo_uint nelems, lzo_uint size)
+{
+	if (!lzo_alloc_hook)
+		return NULL;
+
+	return lzo_alloc_hook(nelems,size);
+}
+
+
+LZO_PUBLIC(lzo_voidp)
+lzo_malloc(lzo_uint size)
+{
+	if (!lzo_alloc_hook)
+		return NULL;
+
+#if defined(__palmos__)
+	return lzo_alloc_hook(size,1);
+#elif (LZO_UINT_MAX <= SIZE_T_MAX)
+	return lzo_alloc_hook(size,1);
+#elif defined(HAVE_HALLOC)
+	/* use segment granularity by default */
+    if (size + 15 > size)   /* avoid overflow */
+		return lzo_alloc_hook((size+15)/16,16);
+	return lzo_alloc_hook(size,1);
+#else
+	return lzo_alloc_hook(size,1);
+#endif
+}
+
+
+LZO_PUBLIC(void)
+lzo_free(lzo_voidp p)
+{
+	if (!lzo_free_hook)
+		return;
+
+	lzo_free_hook(p);
+}
+
+
+/*
+vi:ts=4:et
+*/