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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_LOG
22 
23 #include <stdarg.h>
24 #include <stdio.h>
25 
26 #include <grpc/support/alloc.h>
27 #include <grpc/support/log.h>
28 #include <grpc/support/log_windows.h>
29 #include <grpc/support/string_util.h>
30 #include <grpc/support/time.h>
31 
32 #include "src/core/lib/gpr/string.h"
33 #include "src/core/lib/gpr/string_windows.h"
34 
gpr_log(const char * file,int line,gpr_log_severity severity,const char * format,...)35 void gpr_log(const char* file, int line, gpr_log_severity severity,
36              const char* format, ...) {
37   /* Avoid message construction if gpr_log_message won't log */
38   if (gpr_should_log(severity) == 0) {
39     return;
40   }
41 
42   char* message = NULL;
43   va_list args;
44   int ret;
45 
46   /* Determine the length. */
47   va_start(args, format);
48   ret = _vscprintf(format, args);
49   va_end(args);
50   if (ret < 0) {
51     message = NULL;
52   } else {
53     /* Allocate a new buffer, with space for the NUL terminator. */
54     size_t strp_buflen = (size_t)ret + 1;
55     message = (char*)gpr_malloc(strp_buflen);
56 
57     /* Print to the buffer. */
58     va_start(args, format);
59     ret = vsnprintf_s(message, strp_buflen, _TRUNCATE, format, args);
60     va_end(args);
61     if ((size_t)ret != strp_buflen - 1) {
62       /* This should never happen. */
63       gpr_free(message);
64       message = NULL;
65     }
66   }
67 
68   gpr_log_message(file, line, severity, message);
69   gpr_free(message);
70 }
71 
72 /* Simple starter implementation */
gpr_default_log(gpr_log_func_args * args)73 void gpr_default_log(gpr_log_func_args* args) {
74   const char* final_slash;
75   const char* display_file;
76   char time_buffer[64];
77   time_t timer;
78   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
79   struct tm tm;
80 
81   timer = (time_t)now.tv_sec;
82   final_slash = strrchr(args->file, '\\');
83   if (final_slash == NULL)
84     display_file = args->file;
85   else
86     display_file = final_slash + 1;
87 
88   if (localtime_s(&tm, &timer)) {
89     strcpy(time_buffer, "error:localtime");
90   } else if (0 ==
91              strftime(time_buffer, sizeof(time_buffer), "%m%d %H:%M:%S", &tm)) {
92     strcpy(time_buffer, "error:strftime");
93   }
94 
95   fprintf(stderr, "%s%s.%09u %5lu %s:%d] %s\n",
96           gpr_log_severity_string(args->severity), time_buffer,
97           (int)(now.tv_nsec), GetCurrentThreadId(), display_file, args->line,
98           args->message);
99   fflush(stderr);
100 }
101 
102 #endif /* GPR_WINDOWS_LOG */
103