toolkit/mozapps/update/src/updater/readstrings.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
  10  *
  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is mozilla.org code.
  17  *
  18  * The Initial Developer of the Original Code is Google Inc.
  19  * Portions created by the Initial Developer are Copyright (C) 2005
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *  Darin Fisher <darin@meer.net>
  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 <limits.h>
  40 #include <string.h>
  41 #include <stdio.h>
  42 #include "readstrings.h"
  43 #include "errors.h"
  44
  45 // stack based FILE wrapper to ensure that fclose is called.
  46 class AutoFILE {
  47 public:
  48   AutoFILE(FILE *fp) : fp_(fp) {}
  49   ~AutoFILE() { if (fp_) fclose(fp_); }
  50   operator FILE *() { return fp_; }
  51 private:
  52   FILE *fp_;
  53 };
  54
  55 // very basic parser for updater.ini
  56 int
  57 ReadStrings(const char *path, StringTable *results)
  58 {
  59   AutoFILE fp = fopen(path, "r");
  60   if (!fp)
  61     return READ_ERROR;
  62
  63   // Trim leading junk -- this is a hack!
  64   if (!fgets(results->title, MAX_TEXT_LEN, fp))
  65     return READ_ERROR;
  66   if (!fgets(results->title, MAX_TEXT_LEN, fp))
  67     return READ_ERROR;
  68
  69   // Now, read the values we care about.
  70   if (!fgets(results->title, MAX_TEXT_LEN, fp))
  71     return READ_ERROR;
  72   if (!fgets(results->info, MAX_TEXT_LEN, fp))
  73     return READ_ERROR;
  74
  75   // Trim trailing newline character and leading 'key='
  76   char *strings[] = {
  77     results->title, results->info, NULL
  78   };
  79   for (char **p = strings; *p; ++p) {
  80     int len = strlen(*p);
  81     if (len)
  82       (*p)[len - 1] = '\0';
  83
  84     char *eq = strchr(*p, '=');
  85     if (!eq)
  86       return PARSE_ERROR;
  87     memmove(*p, eq + 1, len - (eq - *p + 1));
  88   }
  89
  90   return OK;
  91 }