зеркало из https://github.com/mozilla/gecko-dev.git
157 строки
3.4 KiB
C++
157 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 6; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsGlueLinking.h"
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#include "nsXPCOMGlue.h"
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#define INCL_DOS
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#define INCL_DOSERRORS
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#include <os2.h>
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#include <stdlib.h>
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#include <stdio.h>
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struct DependentLib
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{
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HMODULE libHandle;
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DependentLib *next;
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};
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static DependentLib *sTop;
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HMODULE sXULLibrary = NULLHANDLE;
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static void
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AppendDependentLib(HMODULE libHandle)
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{
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DependentLib *d = new DependentLib;
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if (!d)
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return;
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d->next = sTop;
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d->libHandle = libHandle;
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sTop = d;
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}
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static void
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ReadDependentCB(const char *aDependentLib, bool do_preload)
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{
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CHAR pszError[_MAX_PATH];
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ULONG ulrc = NO_ERROR;
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HMODULE h;
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ulrc = DosLoadModule(pszError, _MAX_PATH, aDependentLib, &h);
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if (ulrc != NO_ERROR)
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return;
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AppendDependentLib(h);
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}
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// like strpbrk but finds the *last* char, not the first
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static char*
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ns_strrpbrk(char *string, const char *strCharSet)
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{
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char *found = NULL;
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for (; *string; ++string) {
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for (const char *search = strCharSet; *search; ++search) {
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if (*search == *string) {
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found = string;
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// Since we're looking for the last char, we save "found"
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// until we're at the end of the string.
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}
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}
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}
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return found;
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}
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nsresult
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XPCOMGlueLoad(const char *xpcomFile, GetFrozenFunctionsFunc *func)
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{
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CHAR pszError[_MAX_PATH];
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ULONG ulrc = NO_ERROR;
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HMODULE h;
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if (xpcomFile[0] == '.' && xpcomFile[1] == '\0') {
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xpcomFile = XPCOM_DLL;
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}
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else {
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char xpcomDir[MAXPATHLEN];
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_fullpath(xpcomDir, xpcomFile, sizeof(xpcomDir));
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char *lastSlash = ns_strrpbrk(xpcomDir, "/\\");
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if (lastSlash) {
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*lastSlash = '\0';
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XPCOMGlueLoadDependentLibs(xpcomDir, ReadDependentCB);
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snprintf(lastSlash, MAXPATHLEN - strlen(xpcomDir), "\\" XUL_DLL);
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DosLoadModule(pszError, _MAX_PATH, xpcomDir, &sXULLibrary);
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}
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}
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ulrc = DosLoadModule(pszError, _MAX_PATH, xpcomFile, &h);
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if (ulrc != NO_ERROR)
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return nullptr;
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AppendDependentLib(h);
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GetFrozenFunctionsFunc sym;
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ulrc = DosQueryProcAddr(h, 0, "_NS_GetFrozenFunctions", (PFN*)&sym);
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if (ulrc != NO_ERROR) {
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XPCOMGlueUnload();
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return NS_ERROR_NOT_AVAILABLE;
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}
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*func = sym;
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return NS_OK;
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}
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void
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XPCOMGlueUnload()
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{
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while (sTop) {
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DosFreeModule(sTop->libHandle);
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DependentLib *temp = sTop;
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sTop = sTop->next;
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delete temp;
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}
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if (sXULLibrary) {
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DosFreeModule(sXULLibrary);
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sXULLibrary = nullptr;
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}
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}
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nsresult
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XPCOMGlueLoadXULFunctions(const nsDynamicFunctionLoad *symbols)
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{
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ULONG ulrc = NO_ERROR;
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if (!sXULLibrary)
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return NS_ERROR_NOT_INITIALIZED;
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nsresult rv = NS_OK;
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while (symbols->functionName) {
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char buffer[512];
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snprintf(buffer, sizeof(buffer), "_%s", symbols->functionName);
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ulrc = DosQueryProcAddr(sXULLibrary, 0, buffer, (PFN*)symbols->function);
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if (ulrc != NO_ERROR)
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rv = NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
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++symbols;
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}
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return rv;
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}
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