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1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #include <grpc/support/port_platform.h>
20 
21 #ifdef GPR_WINDOWS_ENV
22 
23 #include <windows.h>
24 
25 #include <grpc/support/alloc.h>
26 #include <grpc/support/log.h>
27 #include <grpc/support/string_util.h>
28 
29 #include "src/core/lib/gpr/env.h"
30 #include "src/core/lib/gpr/string.h"
31 #include "src/core/lib/gpr/string_windows.h"
32 
gpr_getenv_silent(const char * name,char ** dst)33 const char* gpr_getenv_silent(const char* name, char** dst) {
34   *dst = gpr_getenv(name);
35   return NULL;
36 }
37 
gpr_getenv(const char * name)38 char* gpr_getenv(const char* name) {
39   char* result = NULL;
40   DWORD size;
41   LPTSTR tresult = NULL;
42   LPTSTR tname = gpr_char_to_tchar(name);
43   DWORD ret;
44 
45   ret = GetEnvironmentVariable(tname, NULL, 0);
46   if (ret == 0) {
47     gpr_free(tname);
48     return NULL;
49   }
50   size = ret * (DWORD)sizeof(TCHAR);
51   tresult = (LPTSTR)gpr_malloc(size);
52   ret = GetEnvironmentVariable(tname, tresult, size);
53   gpr_free(tname);
54   if (ret == 0) {
55     gpr_free(tresult);
56     return NULL;
57   }
58   result = gpr_tchar_to_char(tresult);
59   gpr_free(tresult);
60   return result;
61 }
62 
gpr_setenv(const char * name,const char * value)63 void gpr_setenv(const char* name, const char* value) {
64   LPTSTR tname = gpr_char_to_tchar(name);
65   LPTSTR tvalue = gpr_char_to_tchar(value);
66   BOOL res = SetEnvironmentVariable(tname, tvalue);
67   gpr_free(tname);
68   gpr_free(tvalue);
69   GPR_ASSERT(res);
70 }
71 
72 #endif /* GPR_WINDOWS_ENV */
73