reactos/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 /* INCLUDES *******************************************************************/
  21
  22 #include <freeldr.h>
  23
  24 #define TAG_STRING  ' rtS'
  25 #define TAG_OS_ITEM 'tISO'
  26
  27 /* FUNCTIONS ******************************************************************/
  28
  29 static PCSTR CopyString(PCSTR Source)
  30 {
  31     PSTR Dest;
  32
  33     if (!Source)
  34         return NULL;
  35
  36     Dest = FrLdrHeapAlloc(strlen(Source) + 1, TAG_STRING);
  37     if (Dest)
  38         strcpy(Dest, Source);
  39
  40     return Dest;
  41 }
  42
  43 OperatingSystemItem* InitOperatingSystemList(ULONG* OperatingSystemCountPointer)
  44 {
  45     ULONG Idx;
  46     CHAR SettingName[260];
  47     CHAR SettingValue[260];
  48     ULONG_PTR SectionId;
  49     PCHAR TitleStart, TitleEnd;
  50     PCSTR OsLoadOptions;
  51     ULONG Count;
  52     OperatingSystemItem* Items;
  53
  54     /* Open the [FreeLoader] section */
  55     if (!IniOpenSection("Operating Systems", &SectionId))
  56         return NULL;
  57
  58     /* Count number of operating systems in the section */
  59     Count = IniGetNumSectionItems(SectionId);
  60
  61     /* Allocate memory to hold operating system lists */
  62     Items = FrLdrHeapAlloc(Count * sizeof(OperatingSystemItem), TAG_OS_ITEM);
  63     if (!Items)
  64         return NULL;
  65
  66     /* Now loop through and read the operating system section and display names */
  67     for (Idx = 0; Idx < Count; Idx++)
  68     {
  69         IniReadSettingByNumber(SectionId, Idx, SettingName, sizeof(SettingName), SettingValue, sizeof(SettingValue));
  70
  71         /* Search start and end of the title */
  72         OsLoadOptions = NULL;
  73         TitleStart = SettingValue;
  74         while (*TitleStart == ' ' || *TitleStart == '"')
  75             TitleStart++;
  76         TitleEnd = TitleStart;
  77         if (*TitleEnd != ANSI_NULL)
  78             TitleEnd++;
  79         while (*TitleEnd != ANSI_NULL && *TitleEnd != '"')
  80             TitleEnd++;
  81         if (*TitleEnd != ANSI_NULL)
  82         {
  83             *TitleEnd = ANSI_NULL;
  84             OsLoadOptions = TitleEnd + 1;
  85         }
  86
  87         /* Copy the system partition, identifier and options */
  88         Items[Idx].SystemPartition = CopyString(SettingName);
  89         Items[Idx].LoadIdentifier = CopyString(TitleStart);
  90         Items[Idx].OsLoadOptions = CopyString(OsLoadOptions);
  91     }
  92
  93     /* Return success */
  94     *OperatingSystemCountPointer = Count;
  95     return Items;
  96 }