reactos/lib/iphlpapi/registry.c

   1 #include <stdio.h>
   2 #include <windows.h>
   3 #include <tchar.h>
   4 #include <stdlib.h>
   5 #include "ipregprivate.h"
   6
   7 #include "debug.h"
   8
   9 int GetLongestChildKeyName( HANDLE RegHandle ) {
  10   LONG Status;
  11   DWORD MaxAdapterName;
  12
  13   Status = RegQueryInfoKeyW(RegHandle,
  14                             NULL,
  15                             NULL,
  16                             NULL,
  17                             NULL,
  18                             &MaxAdapterName,
  19                             NULL,
  20                             NULL,
  21                             NULL,
  22                             NULL,
  23                             NULL,
  24                             NULL);
  25   if (Status == ERROR_SUCCESS)
  26     return MaxAdapterName + 1;
  27   else
  28     return -1;
  29 }
  30
  31 LONG OpenChildKeyRead( HANDLE RegHandle,
  32                        PWCHAR ChildKeyName,
  33                        PHKEY ReturnHandle ) {
  34   return RegOpenKeyExW( RegHandle,
  35                         ChildKeyName,
  36                         0,
  37                         KEY_READ,
  38                         ReturnHandle );
  39 }
  40
  41 /*
  42  * Yields a malloced value that must be freed.
  43  */
  44
  45 PWCHAR GetNthChildKeyName( HANDLE RegHandle, DWORD n ) {
  46   LONG Status;
  47   int MaxAdapterName = GetLongestChildKeyName( RegHandle );
  48   PWCHAR Value;
  49   DWORD ValueLen;
  50
  51   if (MaxAdapterName == -1) {
  52     RegCloseKey( RegHandle );
  53     return 0;
  54   }
  55
  56   ValueLen = MaxAdapterName;
  57   Value = (PWCHAR)malloc( MaxAdapterName * sizeof(WCHAR) );
  58   Status = RegEnumKeyExW( RegHandle, n, Value, &ValueLen,
  59                           NULL, NULL, NULL, NULL );
  60   if (Status != ERROR_SUCCESS)
  61     return 0;
  62   else {
  63     Value[ValueLen] = 0;
  64     return Value;
  65   }
  66 }
  67
  68 void ConsumeChildKeyName( PWCHAR Name ) {
  69   if (Name) free( Name );
  70 }
  71
  72 PWCHAR QueryRegistryValueString( HANDLE RegHandle, PWCHAR ValueName ) {
  73   PWCHAR Name;
  74   DWORD ReturnedSize = 0;
  75
  76   if (RegQueryValueExW( RegHandle, ValueName, NULL, NULL, NULL,
  77                         &ReturnedSize ) != 0)
  78     return 0;
  79   else {
  80     Name = malloc( (ReturnedSize + 1) * sizeof(WCHAR) );
  81     RegQueryValueExW( RegHandle, ValueName, NULL, NULL, (PVOID)Name,
  82                       &ReturnedSize );
  83     Name[ReturnedSize] = 0;
  84     return Name;
  85   }
  86 }
  87
  88 void ConsumeRegValueString( PWCHAR Value ) {
  89   if (Value) free(Value);
  90 }
  91
  92 PWCHAR *QueryRegistryValueStringMulti( HANDLE RegHandle, PWCHAR ValueName ) {
  93   return 0; /* FIXME if needed */
  94 }
  95
  96 void ConsumeRegValueStringMulti( PWCHAR *Value ) {
  97   PWCHAR *Orig = Value;
  98   if (Value) {
  99     while (*Value) {
 100       free(*Value);
 101     }
 102     free(Orig);
 103   }
 104 }