boot/freeldr/freeldr/oslist.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include <freeldr.h>
  21
  22 #define TAG_STRING ' rtS'
  23 #define TAG_OS_ITEM 'tISO'
  24
  25 static PCSTR CopyString(PCSTR Source)
  26 {
  27     PSTR Dest;
  28
  29     if (!Source)
  30         return NULL;
  31     Dest = FrLdrHeapAlloc(strlen(Source) + 1, TAG_STRING);
  32     if (Dest)
  33     {
  34         strcpy(Dest, Source);
  35     }
  36
  37     return Dest;
  38 }
  39
  40 OperatingSystemItem* InitOperatingSystemList(ULONG* OperatingSystemCountPointer)
  41 {
  42     ULONG Idx;
  43     CHAR SettingName[260];
  44     CHAR SettingValue[260];
  45     ULONG_PTR SectionId;
  46     PCHAR TitleStart, TitleEnd;
  47     PCSTR OsLoadOptions;
  48     ULONG Count;
  49     OperatingSystemItem* Items;
  50
  51     //
  52     // Open the [FreeLoader] section
  53     //
  54     if (!IniOpenSection("Operating Systems", &SectionId))
  55     {
  56         return NULL;
  57     }
  58
  59     //
  60     // Count number of operating systems in the section
  61     //
  62     Count = IniGetNumSectionItems(SectionId);
  63
  64     //
  65     // Allocate memory to hold operating system lists
  66     //
  67     Items = FrLdrHeapAlloc(Count * sizeof(OperatingSystemItem), TAG_OS_ITEM);
  68     if (!Items)
  69     {
  70         return NULL;
  71     }
  72
  73     //
  74     // Now loop through and read the operating system section and display names
  75     //
  76     for (Idx = 0; Idx < Count; Idx++)
  77     {
  78         IniReadSettingByNumber(SectionId, Idx, SettingName, sizeof(SettingName), SettingValue, sizeof(SettingValue));
  79
  80         //
  81         // Search start and end of the title
  82         //
  83         OsLoadOptions = NULL;
  84         TitleStart = SettingValue;
  85         while (*TitleStart == ' ' || *TitleStart == '"')
  86             TitleStart++;
  87         TitleEnd = TitleStart;
  88         if (*TitleEnd != ANSI_NULL)
  89             TitleEnd++;
  90         while (*TitleEnd != ANSI_NULL && *TitleEnd != '"')
  91             TitleEnd++;
  92         if (*TitleEnd != ANSI_NULL)
  93         {
  94             *TitleEnd = ANSI_NULL;
  95             OsLoadOptions = TitleEnd + 1;
  96         }
  97
  98         //
  99         // Copy the system partition, identifier and options
 100         //
 101         Items[Idx].SystemPartition = CopyString(SettingName);
 102         Items[Idx].LoadIdentifier = CopyString(TitleStart);
 103         Items[Idx].OsLoadOptions = CopyString(OsLoadOptions);
 104     }
 105
 106     //
 107     // Return success
 108     //
 109     *OperatingSystemCountPointer = Count;
 110     return Items;
 111 }