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_TMPFILE
22
23 #include <io.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <tchar.h>
27
28 #include <grpc/support/alloc.h>
29 #include <grpc/support/log.h>
30 #include <grpc/support/string_util.h>
31
32 #include "src/core/lib/gpr/tmpfile.h"
33 #include "src/core/lib/gprpp/crash.h"
34 #include "src/core/lib/gprpp/tchar.h"
35
gpr_tmpfile(const char * prefix,char ** tmp_filename_out)36 FILE* gpr_tmpfile(const char* prefix, char** tmp_filename_out) {
37 FILE* result = NULL;
38 TCHAR tmp_path[MAX_PATH];
39 TCHAR tmp_filename[MAX_PATH];
40 DWORD status;
41 UINT success;
42
43 if (tmp_filename_out != NULL) *tmp_filename_out = NULL;
44
45 // Convert our prefix to TCHAR.
46 grpc_core::TcharString template_string = grpc_core::CharToTchar(prefix);
47
48 // Get the path to the best temporary folder available.
49 status = GetTempPath(MAX_PATH, tmp_path);
50 if (status == 0 || status > MAX_PATH) goto end;
51
52 // Generate a unique filename with our template + temporary path.
53 success = GetTempFileName(tmp_path, template_string.c_str(), 0, tmp_filename);
54 if (!success) goto end;
55
56 // Open a file there.
57 if (_tfopen_s(&result, tmp_filename, TEXT("wb+")) != 0) goto end;
58
59 end:
60 if (result && tmp_filename_out) {
61 *tmp_filename_out =
62 gpr_strdup(grpc_core::TcharToChar(tmp_filename).c_str());
63 }
64
65 return result;
66 }
67
68 #endif // GPR_WINDOWS_TMPFILE
69