1 | /**************************************************************************
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2 | *
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3 | * timing.c -- Program timing routines
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4 | * Copyright (C) 1994 Neil Sharman
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5 | *
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | *
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20 | **************************************************************************/
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21 |
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22 | #include "sysfuncs.h"
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23 | #include "timing.h"
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24 |
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25 |
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26 | /*
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27 | * Return the time in seconds since 00:00:00 GMT, Jan. 1, 1970 to the
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28 | * best precision possible
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29 | *
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30 | */
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31 | double
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32 | RealTime (void)
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33 | {
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34 | return ((double) time (NULL));
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35 | }
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36 |
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37 |
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38 |
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39 | /*
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40 | * Return the amount of system and user CPU used by the process to date to
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41 | * the best precision possible. If user is non-null then it is initialised to
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42 | * the user time. If sys is non-null then it is initialised to the system time.
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43 | *
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44 | */
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45 | double
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46 | CPUTime (double *user, double *sys)
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47 | {
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48 |
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49 | #if defined(HAVE_TIMES)
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50 |
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51 | struct tms buffer;
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52 | static double clk_tck = 0;
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53 | double u, s;
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54 |
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55 | times (&buffer);
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56 |
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57 | if (clk_tck == 0)
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58 | clk_tck = CLK_TCK;
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59 |
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60 | u = (double) buffer.tms_utime / clk_tck;
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61 | s = (double) buffer.tms_stime / clk_tck;
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62 | if (user)
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63 | *user = u;
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64 | if (sys)
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65 | *sys = s;
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66 | return u + s;
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67 |
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68 | #elif defined(HAVE_GETRUSAGE)
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69 |
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70 | struct rusage ruse;
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71 | getrusage (RUSAGE_SELF, &ruse);
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72 | if (user)
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73 | *user = (double) ruse.ru_utime.tv_sec +
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74 | (double) ruse.ru_utime.tv_usec / 1000000;
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75 | if (sys)
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76 | *sys = (double) ruse.ru_stime.tv_sec +
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77 | (double) ruse.ru_stime.tv_usec / 1000000;
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78 | return ((double) ruse.ru_utime.tv_sec + ruse.ru_stime.tv_sec +
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79 | ((double) ruse.ru_utime.tv_usec + ruse.ru_stime.tv_usec) / 1000000);
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80 |
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81 | #else
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82 |
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83 | /* [RPAP - Feb 97: WIN32 Port] */
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84 | #ifdef __WIN32__
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85 | if (user) *user = 0.0;
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86 | if (sys) *sys = 0.0;
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87 | return 0.0;
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88 | #else
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89 | -->Can NOT find a system time routine to use ! !!
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90 | #endif /* __WIN32__ */
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91 |
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92 | #endif
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93 |
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94 | }
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95 |
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96 |
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97 |
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98 |
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99 | /*
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100 | * Get the Real and CPU time and store them in a ProgTime structure
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101 | */
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102 | void
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103 | GetTime (ProgTime * StartTime)
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104 | {
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105 | StartTime->RealTime = RealTime ();
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106 | StartTime->CPUTime = CPUTime (NULL, NULL);
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107 | }
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108 |
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109 |
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110 |
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111 |
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112 | /*
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113 | * Display the Real and CPU time elapsed since the StartTime anf FinishTime
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114 | * structures were initialised. If FinishTime is NULL then FinishTime is
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115 | * Now.
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116 | */
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117 | char *
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118 | ElapsedTime (ProgTime * StartTime,
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119 | ProgTime * FinishTime)
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120 | {
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121 | static char buf[50];
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122 | double Real, CPU, hour, min, sec;
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123 | if (!FinishTime)
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124 | {
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125 | Real = RealTime () - StartTime->RealTime;
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126 | CPU = CPUTime (NULL, NULL) - StartTime->CPUTime;
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127 | }
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128 | else
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129 | {
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130 | Real = FinishTime->RealTime - StartTime->RealTime;
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131 | CPU = FinishTime->CPUTime - StartTime->CPUTime;
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132 | }
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133 | hour = floor (CPU / 3600);
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134 | min = floor ((CPU - hour * 3600) / 60);
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135 | sec = CPU - hour * 3600 - min * 60;
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136 | sprintf (buf, "%02.0f:%02.0f:%05.2f cpu, %02d:%02d:%02d elapsed.",
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137 | hour, min, sec,
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138 | ((int) ceil (Real)) / 3600,
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139 | (((int) ceil (Real)) % 3600) / 60, ((int) ceil (Real)) % 60);
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140 | return (buf);
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141 | }
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142 |
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143 |
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144 | #define MILLION 1000000
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145 |
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146 | /* ===============================================================================
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147 | * Function: cputime_string
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148 | * Description:
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149 | * Prints out given cpu time into a string buffer.
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150 | * Input: cpu-time in clock_t or timeval format
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151 | * Output: pointer to internal buffer
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152 | * =============================================================================== */
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153 |
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154 | #ifdef HAVE_TIMES
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155 | char *
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156 | cputime_string (clock_t clk)
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157 | {
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158 | static char buf[15];
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159 | double CPU, hour, min, sec;
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160 |
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161 | CPU = (double) clk / (double) CLK_TCK;
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162 | hour = floor (CPU / 3600);
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163 | min = floor ((CPU - hour * 3600) / 60);
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164 | sec = CPU - hour * 3600 - min * 60;
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165 | sprintf (buf, "%02.0f:%02.0f:%05.2f", hour, min, sec);
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166 | return (buf);
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167 | }
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168 | #else
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169 | char *
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170 | cputime_string (struct timeval *t)
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171 | {
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172 | static char buf[15];
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173 | double CPU, hour, min, sec;
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174 |
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175 | CPU = (double) t->tv_sec + (double) t->tv_usec / MILLION;
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176 | hour = floor (CPU / 3600);
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177 | min = floor ((CPU - hour * 3600) / 60);
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178 | sec = CPU - hour * 3600 - min * 60;
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179 | sprintf (buf, "%02.0f:%02.0f:%05.2f", hour, min, sec);
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180 | return (buf);
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181 | }
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182 | #endif
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183 |
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184 |
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185 |
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186 | /* ===============================================================================
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187 | * Function: time_normalise
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188 | * Description:
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189 | * If the micro-second component is negative or over a million,
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190 | * then must take the over/under flow and add it to the second component.
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191 | * Usage:
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192 | * Use this routine when you have just been doing straight addition and
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193 | * subtraction on the micro-second component. For this could lead to a
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194 | * negative number or over a million.
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195 | *
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196 | * =============================================================================== */
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197 |
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198 | #ifndef HAVE_TIMES
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199 |
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200 | #ifndef __WIN32__ /* [RPAP - Feb 97: WIN32 Port] */
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201 | static
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202 | #endif
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203 | void
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204 | time_normalise (struct timeval *t)
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205 | {
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206 | while (t->tv_usec < 0)
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207 | {
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208 | t->tv_usec += MILLION;
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209 | t->tv_sec--;
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210 | }
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211 | while (t->tv_usec > MILLION)
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212 | {
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213 | t->tv_usec -= MILLION;
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214 | t->tv_sec++;
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215 | }
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216 | }
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217 | #endif
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