1 /* MPFR Logging functions.
2
3 Copyright 2005-2023 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramba projects, INRIA.
5
6 This file is part of the GNU MPFR Library.
7
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
12
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23 #include "mpfr-impl.h"
24
25 /* Logging MPFR needs GCC >= 3.0 and GLIBC >= 2.0. */
26
27 #ifdef MPFR_USE_LOGGING
28
29 /* The <time.h> header might not be available everywhere (it is standard,
30 but not even required by freestanding C implementations); thus it isn't
31 included unconditionally. */
32 #include <time.h>
33
34 /* Define LOGGING variables */
35
36 FILE *mpfr_log_file;
37 int mpfr_log_flush;
38 int mpfr_log_type;
39 int mpfr_log_level;
40 int mpfr_log_current;
41 int mpfr_log_worstcase_limit;
42 mpfr_prec_t mpfr_log_prec;
43
44 static void mpfr_log_begin (void) __attribute__((constructor));
45
46 /* We let the system close the LOG itself
47 (Otherwise functions called by destructor can't use LOG File */
48 static void
49 mpfr_log_begin (void)
50 {
51 const char *var;
52 time_t tt;
53
54 /* Grab some information */
55 var = getenv ("MPFR_LOG_LEVEL");
56 mpfr_log_level = var == NULL || *var == 0 ? 7 : atoi (var);
57 mpfr_log_current = 0;
58
59 var = getenv ("MPFR_LOG_PREC");
60 mpfr_log_prec = var == NULL ? 6 : atol (var);
61
62 /* Get what we need to log */
63 mpfr_log_type = 0;
64 if (getenv ("MPFR_LOG_INPUT") != NULL)
65 mpfr_log_type |= MPFR_LOG_INPUT_F;
66 if (getenv ("MPFR_LOG_OUTPUT") != NULL)
67 mpfr_log_type |= MPFR_LOG_OUTPUT_F;
68 if (getenv ("MPFR_LOG_TIME") != NULL)
69 mpfr_log_type |= MPFR_LOG_TIME_F;
70 if (getenv ("MPFR_LOG_INTERNAL") != NULL)
71 mpfr_log_type |= MPFR_LOG_INTERNAL_F;
72 if (getenv ("MPFR_LOG_MSG") != NULL)
73 mpfr_log_type |= MPFR_LOG_MSG_F;
74 if (getenv ("MPFR_LOG_ZIV") != NULL)
75 mpfr_log_type |= MPFR_LOG_BADCASE_F;
76 if (getenv ("MPFR_LOG_STAT") != NULL)
77 mpfr_log_type |= MPFR_LOG_STAT_F;
78 if (getenv ("MPFR_LOG_ALL") != NULL)
79 mpfr_log_type = MPFR_LOG_INPUT_F|MPFR_LOG_OUTPUT_F|MPFR_LOG_TIME_F
80 |MPFR_LOG_INTERNAL_F|MPFR_LOG_MSG_F|MPFR_LOG_BADCASE_F|MPFR_LOG_STAT_F;
81
82 mpfr_log_flush = getenv ("MPFR_LOG_FLUSH") != NULL;
83
84 /* Open filename if needed */
85 var = getenv ("MPFR_LOG_FILE");
86 if (var == NULL || *var == 0)
87 var = "mpfr.log";
88 if (mpfr_log_type != 0)
89 {
90 mpfr_log_file = fopen (var, "w");
91 if (mpfr_log_file == NULL)
92 {
93 fprintf (stderr, "MPFR LOG: Can't open '%s' with w.\n", var);
94 abort ();
95 }
96 time (&tt);
97 fprintf (mpfr_log_file, "MPFR LOG FILE %s\n", ctime (&tt));
98 fflush (mpfr_log_file); /* always done */
99 }
100 }
101
102 /* Return user CPU time measured in milliseconds. Thanks to Torbjorn. */
103
104 #if defined (ANSIONLY) || defined (USG) || defined (__SVR4) \
105 || defined (_UNICOS) || defined(__hpux)
106
107 int
108 mpfr_get_cputime (void)
109 {
110 return (int) ((unsigned long long) clock () * 1000 / CLOCKS_PER_SEC);
111 }
112
113 #else /* Use getrusage for cputime */
114
115 #include <sys/types.h>
116 #include <sys/resource.h>
117
118 int
119 mpfr_get_cputime (void)
120 {
121 struct rusage rus;
122 getrusage (0, &rus);
123 return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
124 }
125
126 #endif /* cputime */
127
128 #endif /* MPFR_USE_LOGGING */