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lightning-sunbird  0.9+nobinonly
readstrings.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* vim:set ts=2 sw=2 sts=2 et cindent: */
00003 /* ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is mozilla.org code.
00017  *
00018  * The Initial Developer of the Original Code is Google Inc.
00019  * Portions created by the Initial Developer are Copyright (C) 2005
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *  Darin Fisher <darin@meer.net>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include <limits.h>
00040 #include <string.h>
00041 #include <stdio.h>
00042 #include "readstrings.h"
00043 #include "errors.h"
00044 
00045 // stack based FILE wrapper to ensure that fclose is called.
00046 class AutoFILE {
00047 public:
00048   AutoFILE(FILE *fp) : fp_(fp) {}
00049   ~AutoFILE() { if (fp_) fclose(fp_); }
00050   operator FILE *() { return fp_; }
00051 private:
00052   FILE *fp_;
00053 };
00054 
00055 // very basic parser for updater.ini
00056 int
00057 ReadStrings(const char *path, StringTable *results)
00058 {
00059   AutoFILE fp = fopen(path, "r");
00060   if (!fp)
00061     return READ_ERROR;
00062 
00063   // Trim leading junk -- this is a hack!
00064   if (!fgets(results->title, MAX_TEXT_LEN, fp))
00065     return READ_ERROR;
00066   if (!fgets(results->title, MAX_TEXT_LEN, fp))
00067     return READ_ERROR;
00068 
00069   // Now, read the values we care about.
00070   if (!fgets(results->title, MAX_TEXT_LEN, fp))
00071     return READ_ERROR;
00072   if (!fgets(results->info, MAX_TEXT_LEN, fp))
00073     return READ_ERROR;
00074 
00075   // Trim trailing newline character and leading 'key='
00076   char *strings[] = {
00077     results->title, results->info, NULL
00078   };
00079   for (char **p = strings; *p; ++p) {
00080     int len = strlen(*p);
00081     if (len)
00082       (*p)[len - 1] = '\0';
00083 
00084     char *eq = strchr(*p, '=');
00085     if (!eq)
00086       return PARSE_ERROR;
00087     memmove(*p, eq + 1, len - (eq - *p + 1));
00088   }
00089 
00090   return OK;
00091 }