src/w32reg.c

   1 /* Emulate the X Resource Manager through the registry.
   2    Copyright (C) 1990, 1993, 1994 Free Software Foundation.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* Written by Kevin Gallo */
  22
  23 #include <config.h>
  24 #include "lisp.h"
  25 #include "w32term.h"
  26 #include "blockinput.h"
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
  32
  33 static char *
  34 w32_get_rdb_resource (rdb, resource)
  35      char *rdb;
  36      char *resource;
  37 {
  38   char *value = rdb;
  39   int len = strlen (resource);
  40
  41   while (*value)
  42     {
  43       /* Comparison is case-insensitive because registry searches are too.  */
  44       if ((strnicmp (value, resource, len) == 0) && (value[len] == ':'))
  45         return xstrdup (&value[len + 1]);
  46
  47       value = strchr (value, '\0') + 1;
  48     }
  49
  50   return NULL;
  51 }
  52
  53 LPBYTE
  54 w32_get_string_resource (name, class, dwexptype)
  55      char *name, *class;
  56      DWORD dwexptype;
  57 {
  58   LPBYTE lpvalue = NULL;
  59   HKEY hrootkey = NULL;
  60   DWORD dwType;
  61   DWORD cbData;
  62   BOOL ok = FALSE;
  63   HKEY hive = HKEY_CURRENT_USER;
  64
  65  trykey:
  66
  67   BLOCK_INPUT;
  68
  69   /* Check both the current user and the local machine to see if we have
  70      any resources */
  71
  72   if (RegOpenKeyEx (hive, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
  73     {
  74       char *keyname;
  75
  76       if (RegQueryValueEx (hrootkey, name, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
  77           && dwType == dwexptype)
  78         {
  79           keyname = name;
  80         }
  81       else if (RegQueryValueEx (hrootkey, class, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
  82                && dwType == dwexptype)
  83         {
  84           keyname = class;
  85         }
  86       else
  87         {
  88           keyname = NULL;
  89         }
  90
  91       ok = (keyname
  92             && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL
  93             && RegQueryValueEx (hrootkey, keyname, NULL, NULL, lpvalue, &cbData) == ERROR_SUCCESS);
  94
  95       RegCloseKey (hrootkey);
  96     }
  97
  98   UNBLOCK_INPUT;
  99
 100   if (!ok)
 101     {
 102       if (lpvalue)
 103         {
 104           xfree (lpvalue);
 105           lpvalue = NULL;
 106         }
 107       if (hive == HKEY_CURRENT_USER)
 108         {
 109           hive = HKEY_LOCAL_MACHINE;
 110           goto trykey;
 111         }
 112       return (NULL);
 113     }
 114   return (lpvalue);
 115 }
 116
 117 /* Retrieve the string resource specified by NAME with CLASS from
 118    database RDB. */
 119
 120 char *
 121 x_get_string_resource (rdb, name, class)
 122      XrmDatabase rdb;
 123      char *name, *class;
 124 {
 125   if (rdb)
 126     {
 127       char *resource;
 128
 129       if (resource = w32_get_rdb_resource (rdb, name))
 130         return resource;
 131       if (resource = w32_get_rdb_resource (rdb, class))
 132         return resource;
 133     }
 134
 135   return (w32_get_string_resource (name, class, REG_SZ));
 136 }