xpcom/glue/standalone/nsGlueLinkingBeOS.cpp

   1 /* -*- Mode: C++; tab-width: 6; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla XPCOM.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Benjamin Smedberg <benjamin@smedbergs.us>
  19  * Portions created by the Initial Developer are Copyright (C) 2005
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *   Sergei Dolgov <sergei_d@fi.tartu.ee>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either the GNU General Public License Version 2 or later (the "GPL"), or
  27  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
  29  * of those above. If you wish to allow use of your version of this file only
  30  * under the terms of either the GPL or the LGPL, and not to allow others to
  31  * use your version of this file under the terms of the MPL, indicate your
  32  * decision by deleting the provisions above and replace them with the notice
  33  * and other provisions required by the GPL or the LGPL. If you do not delete
  34  * the provisions above, a recipient may use your version of this file under
  35  * the terms of any one of the MPL, the GPL or the LGPL.
  36  *
  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsGlueLinking.h"
  40 #include "nsXPCOMGlue.h"
  41
  42 #include <kernel/image.h>
  43 #include <stdlib.h>
  44 #include <stdio.h>
  45 #include <Entry.h>
  46 #include <Path.h>
  47
  48 #define LEADING_UNDERSCORE
  49
  50
  51 struct DependentLib
  52 {
  53     image_id         libHandle;
  54     DependentLib *next;
  55 };
  56
  57 static DependentLib *sTop;
  58 static image_id sXULLibHandle;
  59
  60 static void
  61 AppendDependentLib(image_id libHandle)
  62 {
  63     DependentLib *d = new DependentLib;
  64     if (!d)
  65         return;
  66
  67     d->next = sTop;
  68     d->libHandle = libHandle;
  69
  70     sTop = d;
  71 }
  72
  73 static void
  74 ReadDependentCB(const char *aDependentLib)
  75 {
  76     image_id libHandle = load_add_on(aDependentLib);
  77     if (!libHandle)
  78         return;
  79
  80     AppendDependentLib(libHandle);
  81 }
  82
  83 GetFrozenFunctionsFunc
  84 XPCOMGlueLoad(const char *xpcomFile)
  85 {
  86     char xpcomDir[MAXPATHLEN];
  87         BPath libpath;
  88     if (libpath.SetTo(xpcomFile, 0, true) == B_OK) {
  89         sprintf(xpcomDir, libpath.Path());
  90         char *lastSlash = strrchr(xpcomDir, '/');
  91         if (lastSlash) {
  92             *lastSlash = '\0';
  93
  94             XPCOMGlueLoadDependentLibs(xpcomDir, ReadDependentCB);
  95
  96             snprintf(lastSlash, MAXPATHLEN - strlen(xpcomDir), "/" XUL_DLL);
  97
  98             sXULLibHandle = load_add_on(xpcomDir);
  99         }
 100     }
 101
 102
 103     image_id libHandle = nsnull;
 104
 105     if (xpcomFile[0] != '.' || xpcomFile[1] != '\0') {
 106         libHandle = load_add_on(xpcomFile);
 107         if (libHandle) {
 108             AppendDependentLib(libHandle);
 109         }
 110     }
 111
 112     GetFrozenFunctionsFunc sym = 0;
 113     status_t result;
 114
 115     result = get_image_symbol(libHandle,
 116                               LEADING_UNDERSCORE "NS_GetFrozenFunctions", B_SYMBOL_TYPE_TEXT, (void **)sym);
 117
 118     if (!sym || B_OK != result)
 119         XPCOMGlueUnload();
 120
 121     return sym;
 122 }
 123
 124 void
 125 XPCOMGlueUnload()
 126 {
 127     while (sTop) {
 128         unload_add_on(sTop->libHandle);
 129
 130         DependentLib *temp = sTop;
 131         sTop = sTop->next;
 132
 133         delete temp;
 134     }
 135
 136     if (sXULLibHandle) {
 137         unload_add_on(sXULLibHandle);
 138         sXULLibHandle = nsnull;
 139     }
 140 }
 141
 142 nsresult
 143 XPCOMGlueLoadXULFunctions(const nsDynamicFunctionLoad *symbols)
 144 {
 145
 146     nsresult rv = NS_OK;
 147
 148     while (symbols->functionName) {
 149         char buffer[512];
 150         snprintf(buffer, sizeof(buffer),
 151                  LEADING_UNDERSCORE "%s", symbols->functionName);
 152
 153         *symbols->function = 0;
 154         status_t result;
 155         result = get_image_symbol(sXULLibHandle, buffer, B_SYMBOL_TYPE_TEXT, (void **)*symbols->function );
 156         if (!*symbols->function || B_OK != result)
 157             rv = NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
 158
 159         ++symbols;
 160     }
 161     return rv;
 162 }