gecko-dev/xpcom/glue/standalone/nsGlueLinkingOS2.cpp

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4.6 KiB
C++

/* -*- Mode: C++; tab-width: 6; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla XPCOM.
*
* The Initial Developer of the Original Code is
* Benjamin Smedberg <benjamin@smedbergs.us>
*
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsGlueLinking.h"
#include "nsXPCOMGlue.h"
#define INCL_DOS
#define INCL_DOSERRORS
#include <os2.h>
#include <stdlib.h>
#include <stdio.h>
struct DependentLib
{
HMODULE libHandle;
DependentLib *next;
};
static DependentLib *sTop;
HMODULE sXULLibrary = NULLHANDLE;
static void
AppendDependentLib(HMODULE libHandle)
{
DependentLib *d = new DependentLib;
if (!d)
return;
d->next = sTop;
d->libHandle = libHandle;
sTop = d;
}
static void
ReadDependentCB(const char *aDependentLib)
{
CHAR pszError[_MAX_PATH];
ULONG ulrc = NO_ERROR;
HMODULE h;
ulrc = DosLoadModule(pszError, _MAX_PATH, aDependentLib, &h);
if (ulrc != NO_ERROR)
return;
AppendDependentLib(h);
}
// like strpbrk but finds the *last* char, not the first
static char*
ns_strrpbrk(char *string, const char *strCharSet)
{
char *found = NULL;
for (; *string; ++string) {
for (const char *search = strCharSet; *search; ++search) {
if (*search == *string) {
found = string;
// Since we're looking for the last char, we save "found"
// until we're at the end of the string.
}
}
}
return found;
}
GetFrozenFunctionsFunc
XPCOMGlueLoad(const char *xpcomFile)
{
CHAR pszError[_MAX_PATH];
ULONG ulrc = NO_ERROR;
HMODULE h;
if (xpcomFile[0] == '.' && xpcomFile[1] == '\0') {
xpcomFile = XPCOM_DLL;
}
else {
char xpcomDir[MAXPATHLEN];
_fullpath(xpcomDir, xpcomFile, sizeof(xpcomDir));
char *lastSlash = ns_strrpbrk(xpcomDir, "/\\");
if (lastSlash) {
*lastSlash = '\0';
XPCOMGlueLoadDependentLibs(xpcomDir, ReadDependentCB);
snprintf(lastSlash, MAXPATHLEN - strlen(xpcomDir), "\\" XUL_DLL);
DosLoadModule(pszError, _MAX_PATH, xpcomDir, &sXULLibrary);
}
}
ulrc = DosLoadModule(pszError, _MAX_PATH, xpcomFile, &h);
if (ulrc != NO_ERROR)
return nsnull;
AppendDependentLib(h);
GetFrozenFunctionsFunc sym;
ulrc = DosQueryProcAddr(h, 0, "NS_GetFrozenFunctions", (PFN*)&sym);
if (ulrc != NO_ERROR)
XPCOMGlueUnload();
return sym;
}
void
XPCOMGlueUnload()
{
while (sTop) {
DosFreeModule(sTop->libHandle);
DependentLib *temp = sTop;
sTop = sTop->next;
delete temp;
}
if (sXULLibrary) {
DosFreeModule(sXULLibrary);
sXULLibrary = nsnull;
}
}
nsresult
XPCOMGlueLoadXULFunctions(const nsDynamicFunctionLoad *symbols)
{
ULONG ulrc = NO_ERROR;
if (!sXULLibrary)
return NS_ERROR_NOT_INITIALIZED;
nsresult rv = NS_OK;
while (symbols->functionName) {
ulrc = DosQueryProcAddr(sXULLibrary, 0, symbols->functionName, (PFN*)symbols->function);
if (ulrc != NO_ERROR)
rv = NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
++symbols;
}
return rv;
}