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Fixed an obvious bug in _checksum_() that isn't triggered by its current use:

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"temp" was added to "sum" in the loop, so that some int8 values were taken
into account more than once.
Cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13431 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2005-07-05 00:59:27 +00:00
parent b1e14283b4
commit ae8de5211d
1 changed files with 43 additions and 80 deletions
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119
src/kits/app/MessageUtils.cpp
View File

@ -1,48 +1,21 @@
//------------------------------------------------------------------------------
// Copyright (c) 2001-2002, OpenBeOS
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// File Name: MessageUtils.cpp
// Author(s): Erik Jaesler <erik@cgsoftware.com>
//
// Description: Extra messaging utility functions
//
//
//------------------------------------------------------------------------------
// Standard Includes -----------------------------------------------------------
#include <string.h>
/*
* Copyright 2001-2005, Haiku.
* Distributed under the terms of the MIT License.
*
* Authors:
* Erik Jaesler (erik@cgsoftware.com)
*/
// System Includes -------------------------------------------------------------
/** Extra messaging utility functions */
#include <string.h>
#include <ByteOrder.h>
// Project Includes ------------------------------------------------------------
#include <MessageUtils.h>
// Local Includes --------------------------------------------------------------
// Local Defines ---------------------------------------------------------------
// Globals ---------------------------------------------------------------------
//------------------------------------------------------------------------------
uint32 _checksum_(const uchar* buf, int32 size)
uint32
_checksum_(const uchar* buf, int32 size)
{
uint32 sum = 0;
uint32 temp = 0;
@ -61,17 +34,16 @@ uint32 _checksum_(const uchar* buf, int32 size)
while (size > 0) {
temp = (temp << 8) + *buf++;
size -= 1;
sum += temp;
}
return sum;
return sum + temp;
}
//------------------------------------------------------------------------------
namespace BPrivate { // Only putting these here because Be did
//------------------------------------------------------------------------------
status_t entry_ref_flatten(char* buffer, size_t* size, const entry_ref* ref)
status_t
entry_ref_flatten(char* buffer, size_t* size, const entry_ref* ref)
{
memcpy((void*)buffer, (const void*)&ref->device, sizeof (ref->device));
buffer += sizeof (ref->device);
@ -79,8 +51,7 @@ status_t entry_ref_flatten(char* buffer, size_t* size, const entry_ref* ref)
buffer += sizeof (ref->directory);
size_t len = 0;
if (ref->name)
{
if (ref->name) {
len = strlen(ref->name) + 1; // extra for NULL terminator
memcpy((void*)buffer, (const void*)ref->name, len);
}
@ -88,11 +59,12 @@ status_t entry_ref_flatten(char* buffer, size_t* size, const entry_ref* ref)
*size = sizeof (ref->device) + sizeof (ref->directory) + len;
return B_OK;
}
//------------------------------------------------------------------------------
status_t entry_ref_unflatten(entry_ref* ref, const char* buffer, size_t size)
status_t
entry_ref_unflatten(entry_ref* ref, const char* buffer, size_t size)
{
if (size < (sizeof (ref->device) + sizeof (ref->directory)))
{
if (size < (sizeof (ref->device) + sizeof (ref->directory))) {
*ref = entry_ref();
return B_BAD_VALUE;
}
@ -103,30 +75,25 @@ status_t entry_ref_unflatten(entry_ref* ref, const char* buffer, size_t size)
sizeof (ref->directory));
buffer += sizeof (ref->directory);
if (ref->device != -1 &&
size > (sizeof (ref->device) + sizeof (ref->directory)))
{
if (ref->device != -1
&& size > (sizeof (ref->device) + sizeof (ref->directory))) {
ref->set_name(buffer);
if (ref->name == NULL)
{
if (ref->name == NULL) {
*ref = entry_ref();
return B_NO_MEMORY;
}
}
else
{
} else
ref->set_name(NULL);
}
return B_OK;
}
//------------------------------------------------------------------------------
status_t entry_ref_swap(char* buffer, size_t size)
status_t
entry_ref_swap(char* buffer, size_t size)
{
if (size < (sizeof (dev_t) + sizeof (ino_t)))
{
return B_BAD_DATA;
}
dev_t* dev = (dev_t*)buffer;
*dev = B_SWAP_INT32(*dev);
@ -137,31 +104,27 @@ status_t entry_ref_swap(char* buffer, size_t size)
return B_OK;
}
//------------------------------------------------------------------------------
size_t calc_padding(size_t size, size_t boundary)
size_t
calc_padding(size_t size, size_t boundary)
{
size_t pad = size % boundary;
if (pad)
{
pad = boundary - pad;
}
return pad;
}
//------------------------------------------------------------------------------
} // namespace BPrivate
//------------------------------------------------------------------------------
int32 TChecksumHelper::CheckSum()
// #pragma mark -
int32
TChecksumHelper::CheckSum()
{
return _checksum_(fBuffer, fBufPtr - fBuffer);
}
//------------------------------------------------------------------------------
/*
* $Log $
*
* $Id $
*
*/