contrib/mpfr/src/logging.c

   1 /* MPFR Logging functions.
   2
   3 Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
   4 Contributed by the AriC and Caramel 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 http://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 /* Can't include them before (in particular, printf.h) */
  30 #include <stdlib.h>
  31 #include <stdarg.h>
  32 #include <time.h>
  33
  34 /* Define LOGGING variables */
  35
  36 FILE *mpfr_log_file;
  37 int   mpfr_log_type;
  38 int   mpfr_log_level;
  39 int   mpfr_log_current;
  40 int   mpfr_log_worstcase_limit;
  41 mpfr_prec_t mpfr_log_prec;
  42
  43 static void mpfr_log_begin (void) __attribute__((constructor));
  44
  45 /* We let the system close the LOG itself
  46    (Otherwise functions called by destructor can't use LOG File */
  47 static void
  48 mpfr_log_begin (void)
  49 {
  50   const char *var;
  51   time_t tt;
  52
  53   /* Grab some information */
  54   var = getenv ("MPFR_LOG_LEVEL");
  55   mpfr_log_level = var == NULL || *var == 0 ? 7 : atoi (var);
  56   mpfr_log_current = 0;
  57
  58   var = getenv ("MPFR_LOG_PREC");
  59   mpfr_log_prec = var == NULL ? 6 : atol (var);
  60
  61   /* Get what we need to log */
  62   mpfr_log_type = 0;
  63   if (getenv ("MPFR_LOG_INPUT") != NULL)
  64     mpfr_log_type |= MPFR_LOG_INPUT_F;
  65   if (getenv ("MPFR_LOG_OUTPUT") != NULL)
  66     mpfr_log_type |= MPFR_LOG_OUTPUT_F;
  67   if (getenv ("MPFR_LOG_TIME") != NULL)
  68     mpfr_log_type |= MPFR_LOG_TIME_F;
  69   if (getenv ("MPFR_LOG_INTERNAL") != NULL)
  70     mpfr_log_type |= MPFR_LOG_INTERNAL_F;
  71   if (getenv ("MPFR_LOG_MSG") != NULL)
  72     mpfr_log_type |= MPFR_LOG_MSG_F;
  73   if (getenv ("MPFR_LOG_ZIV") != NULL)
  74     mpfr_log_type |= MPFR_LOG_BADCASE_F;
  75   if (getenv ("MPFR_LOG_STAT") != NULL)
  76     mpfr_log_type |= MPFR_LOG_STAT_F;
  77   if (getenv ("MPFR_LOG_ALL") != NULL)
  78     mpfr_log_type = MPFR_LOG_INPUT_F|MPFR_LOG_OUTPUT_F|MPFR_LOG_TIME_F
  79       |MPFR_LOG_INTERNAL_F|MPFR_LOG_MSG_F|MPFR_LOG_BADCASE_F|MPFR_LOG_STAT_F;
  80
  81   /* Open filename if needed */
  82   var = getenv ("MPFR_LOG_FILE");
  83   if (var == NULL || *var == 0)
  84     var = "mpfr.log";
  85   if (mpfr_log_type != 0)
  86     {
  87       mpfr_log_file = fopen (var, "w");
  88       if (mpfr_log_file == NULL)
  89         {
  90           fprintf (stderr, "MPFR LOG: Can't open '%s' with w.\n", var);
  91           abort ();
  92         }
  93       time (&tt);
  94       fprintf (mpfr_log_file, "MPFR LOG FILE %s\n", ctime (&tt));
  95     }
  96 }
  97
  98 /* Return user CPU time measured in milliseconds. Thanks to Torbjorn. */
  99
 100 #if defined (ANSIONLY) || defined (USG) || defined (__SVR4) \
 101  || defined (_UNICOS) || defined(__hpux)
 102
 103 int
 104 mpfr_get_cputime (void)
 105 {
 106   return (int) ((unsigned long long) clock () * 1000 / CLOCKS_PER_SEC);
 107 }
 108
 109 #else /* Use getrusage for cputime */
 110
 111 #include <sys/types.h>
 112 #include <sys/resource.h>
 113
 114 int
 115 mpfr_get_cputime (void)
 116 {
 117   struct rusage rus;
 118   getrusage (0, &rus);
 119   return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
 120 }
 121
 122 #endif /* cputime */
 123
 124 #endif /* MPFR_USE_LOGGING */