reactos/lib/iphlpapi/registry.c

   1 #include "iphlpapi_private.h"
   2
   3 #include "debug.h"
   4
   5 int GetLongestChildKeyName( HANDLE RegHandle ) {
   6   LONG Status;
   7   DWORD MaxAdapterName;
   8
   9   Status = RegQueryInfoKeyW(RegHandle,
  10                             NULL,
  11                             NULL,
  12                             NULL,
  13                             NULL,
  14                             &MaxAdapterName,
  15                             NULL,
  16                             NULL,
  17                             NULL,
  18                             NULL,
  19                             NULL,
  20                             NULL);
  21   if (Status == ERROR_SUCCESS)
  22     return MaxAdapterName + 1;
  23   else
  24     return -1;
  25 }
  26
  27 LONG OpenChildKeyRead( HANDLE RegHandle,
  28                        PWCHAR ChildKeyName,
  29                        PHKEY ReturnHandle ) {
  30   return RegOpenKeyExW( RegHandle,
  31                         ChildKeyName,
  32                         0,
  33                         KEY_READ,
  34                         ReturnHandle );
  35 }
  36
  37 /*
  38  * Yields a malloced value that must be freed.
  39  */
  40
  41 PWCHAR GetNthChildKeyName( HANDLE RegHandle, DWORD n ) {
  42   LONG Status;
  43   int MaxAdapterName = GetLongestChildKeyName( RegHandle );
  44   PWCHAR Value;
  45   DWORD ValueLen;
  46
  47   if (MaxAdapterName == -1) {
  48     RegCloseKey( RegHandle );
  49     return 0;
  50   }
  51
  52   ValueLen = MaxAdapterName;
  53   Value = (PWCHAR)HeapAlloc( GetProcessHeap(), 0, MaxAdapterName );
  54   Status = RegEnumKeyExW( RegHandle, n, Value, &ValueLen,
  55                           NULL, NULL, NULL, NULL );
  56   if (Status != ERROR_SUCCESS)
  57     return 0;
  58   else {
  59     Value[ValueLen] = 0;
  60     return Value;
  61   }
  62 }
  63
  64 void ConsumeChildKeyName( PWCHAR Name ) {
  65   if (Name) HeapFree( GetProcessHeap(), 0, Name );
  66 }
  67
  68 PWCHAR QueryRegistryValueString( HANDLE RegHandle, PWCHAR ValueName ) {
  69   PWCHAR Name;
  70   DWORD ReturnedSize = 0;
  71
  72   if (RegQueryValueExW( RegHandle, ValueName, NULL, NULL, NULL,
  73                         &ReturnedSize ) != 0) {
  74     return 0;
  75   } else {
  76     Name = malloc( ReturnedSize );
  77     RegQueryValueExW( RegHandle, ValueName, NULL, NULL, (PVOID)Name,
  78                       &ReturnedSize );
  79     return Name;
  80   }
  81 }
  82
  83 void ConsumeRegValueString( PWCHAR Value ) {
  84   if (Value) free(Value);
  85 }
  86
  87 PWCHAR *QueryRegistryValueStringMulti( HANDLE RegHandle, PWCHAR ValueName ) {
  88   return 0; /* FIXME if needed */
  89 }
  90
  91 void ConsumeRegValueStringMulti( PCHAR *Value ) {
  92   PCHAR *Orig = Value;
  93   if (Value) {
  94     while (*Value) {
  95       free(*Value);
  96     }
  97     free(Orig);
  98   }
  99 }