зеркало из https://github.com/mozilla/pjs.git
172 строки
3.6 KiB
C++
172 строки
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/* nsDll
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*
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* Abstraction of a Dll. Stores modifiedTime and size for easy detection of
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* change in dll.
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*
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* dp Suresh <dp@netscape.com>
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*/
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#include "xcDll.h"
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#include "plstr.h" // strdup and strfree
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nsDll::nsDll(const char *libFullPath) : m_fullpath(NULL), m_instance(NULL),
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m_status(DLL_OK)
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{
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m_lastModTime = LL_ZERO;
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m_size = 0;
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if (libFullPath == NULL)
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{
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m_status = DLL_INVALID_PARAM;
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return;
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}
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m_fullpath = PL_strdup(libFullPath);
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if (m_fullpath == NULL)
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{
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// No more memory
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m_status = DLL_NO_MEM;
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return;
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}
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PRFileInfo statinfo;
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if (PR_GetFileInfo(m_fullpath, &statinfo) != PR_SUCCESS)
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{
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// The stat things works only if people pass in the full pathname.
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// Even if our stat fails, we could be able to load it because of
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// LD_LIBRARY_PATH and other such paths where dlls are searched for
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// XXX we need a way of marking this occurance.
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// XXX m_status = DLL_STAT_ERROR;
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}
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else
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{
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m_size = statinfo.size;
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m_lastModTime = statinfo.modifyTime;
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if (statinfo.type != PR_FILE_FILE)
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{
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// Not a file. Cant work with it.
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m_status = DLL_NOT_FILE;
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return;
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}
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}
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m_status = DLL_OK;
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}
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nsDll::nsDll(const char *libFullPath, PRTime lastModTime, PRUint32 fileSize)
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: m_fullpath(NULL), m_instance(NULL), m_status(DLL_OK)
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{
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m_lastModTime = lastModTime;
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m_size = fileSize;
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if (libFullPath == NULL)
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{
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m_status = DLL_INVALID_PARAM;
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return;
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}
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m_fullpath = PL_strdup(libFullPath);
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if (m_fullpath == NULL)
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{
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// No more memory
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m_status = DLL_NO_MEM;
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return;
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}
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m_status = DLL_OK;
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}
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nsDll::~nsDll(void)
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{
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if (m_instance != NULL)
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Unload();
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if (m_fullpath != NULL) PL_strfree(m_fullpath);
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m_fullpath = NULL;
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}
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PRBool nsDll::Load(void)
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{
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#ifdef XP_MAC
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char *macFileName = NULL;
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int loop;
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#endif
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if (m_status != DLL_OK)
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{
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return (PR_FALSE);
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}
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if (m_instance != NULL)
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{
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// Already loaded
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return (PR_TRUE);
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}
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#ifdef XP_MAC
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// err = ConvertUnixPathToMacPath(m_fullpath, &macFileName);
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if ((macFileName = PL_strdup(m_fullpath)) != NULL)
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{
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if (macFileName[0] == '/')
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{
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for (loop=0; loop<PL_strlen(macFileName); loop++)
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{
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if (macFileName[loop] == '/') macFileName[loop] = ':';
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}
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m_instance = PR_LoadLibrary(&macFileName[1]); // skip over initial slash
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}
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else
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{
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m_instance = PR_LoadLibrary(macFileName);
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}
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}
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#else
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// This is the only right way of doing this...
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m_instance = PR_LoadLibrary(m_fullpath);
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#endif /* XP_MAC */
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return ((m_instance == NULL) ? PR_FALSE : PR_TRUE);
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}
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PRBool nsDll::Unload(void)
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{
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if (m_status != DLL_OK || m_instance == NULL)
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return (PR_FALSE);
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PRStatus ret = PR_UnloadLibrary(m_instance);
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if (ret == PR_SUCCESS)
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{
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m_instance = NULL;
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return (PR_TRUE);
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}
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else
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return (PR_FALSE);
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}
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void * nsDll::FindSymbol(const char *symbol)
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{
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if (symbol == NULL)
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return (NULL);
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// If not already loaded, load it now.
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if (Load() != PR_TRUE)
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return (NULL);
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return (PR_FindSymbol(m_instance, symbol));
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}
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