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cf76e892 JPM |
1 | // |
2 | // Log handler | |
3 | // | |
4 | // Originally by David Raingeard (Cal2) | |
5 | // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS) | |
6 | // Cleanups/new stuff by James Hammons | |
7 | // (C) 2010 Underground Software | |
8 | // | |
9 | // JLH = James Hammons <jlhamm@acm.org> | |
10 | // | |
11 | // Who When What | |
12 | // --- ---------- ------------------------------------------------------------- | |
13 | // JLH 01/16/2010 Created this log ;-) | |
14 | // JLH 07/11/2011 Instead of dumping out on max log file size being reached, we | |
15 | // now just silently ignore any more output. 10 megs ought to be | |
16 | // enough for anybody. ;-) Except when it isn't. :-P | |
17 | // | |
18 | ||
be44e757 | 19 | //#include "log.h" |
cf76e892 JPM |
20 | |
21 | #include <stdlib.h> | |
be44e757 | 22 | #include <stdio.h> |
cf76e892 JPM |
23 | #include <stdarg.h> |
24 | #include <stdint.h> | |
25 | ||
26 | ||
27 | //#define MAX_LOG_SIZE 10000000 // Maximum size of log file (10 MB) | |
28 | #define MAX_LOG_SIZE 100000000 // Maximum size of log file (100 MB) | |
29 | ||
30 | static FILE * log_stream = NULL; | |
31 | static uint32_t logSize = 0; | |
32 | ||
33 | int LogInit(const char * path) | |
34 | { | |
35 | log_stream = fopen(path, "w"); | |
36 | ||
37 | if (log_stream == NULL) | |
38 | return 0; | |
39 | ||
40 | return 1; | |
41 | } | |
42 | ||
43 | FILE * LogGet(void) | |
44 | { | |
45 | return log_stream; | |
46 | } | |
47 | ||
48 | void LogDone(void) | |
49 | { | |
50 | if (log_stream != NULL) | |
51 | fclose(log_stream); | |
52 | } | |
53 | ||
54 | // | |
55 | // This logger is used mainly to ensure that text gets written to the log file | |
56 | // even if the program crashes. The performance hit is acceptable in this case! | |
57 | // | |
58 | void WriteLog(const char * text, ...) | |
59 | { | |
60 | va_list arg; | |
61 | va_start(arg, text); | |
62 | ||
63 | if (log_stream == NULL) | |
64 | { | |
65 | va_end(arg); | |
66 | return; | |
67 | } | |
68 | ||
69 | logSize += vfprintf(log_stream, text, arg); | |
70 | ||
71 | if (logSize > MAX_LOG_SIZE) | |
72 | { | |
73 | // Instead of dumping out, we just close the file and ignore any more output. | |
74 | fflush(log_stream); | |
75 | fclose(log_stream); | |
76 | log_stream = NULL; | |
77 | } | |
78 | ||
79 | va_end(arg); | |
80 | fflush(log_stream); // Make sure that text is written! | |
81 | } |