Diff: timeHelp.h

Revision:

3:f34bbdea0786

Child:

4:1ae9f76749b9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/timeHelp.h	Tue Jun 12 00:27:26 2018 +0000
@@ -0,0 +1,133 @@
+#ifndef TIMEHELP_H
+#define TIMEHELP_H
+
+#include <stdlib.h>
+#include <string>
+
+// return true is seconds is even, false if not
+bool secondsAreEven(char currTime[]) {
+    char seconds[3];
+    seconds[0] = currTime[6];
+    seconds[1] = currTime[7];
+    seconds[2] = 0;
+    
+    int secondsInt = atoi(seconds);
+    
+    return (secondsInt % 2) == 0;
+}
+
+// given a starting time and a number of seconds, add the seconds to that time
+// and put the resulting string into resultTime ... both startTime and resultTime
+// must be character arrays of length 10
+void addSecondsToCurrentTime(char startTime[], char resultTime[], float secsToAdd) {
+
+    int decsToAdd=0,newSecsToAdd=0,minutesToAdd=0,hoursToAdd=0;
+    
+    // if there are enough seconds to add, that an hour
+    // if being added, then do that and subtract what you added
+    if ((int)secsToAdd / 3600 > 0) {
+        hoursToAdd = (int)(secsToAdd / 3600);
+        secsToAdd -= hoursToAdd * 3600;
+    }
+    
+    // there may be minutes to add if there are enough seconds
+    if ((int)secsToAdd / 60 > 0) {
+        minutesToAdd = (int)(secsToAdd / 60);
+        secsToAdd -= minutesToAdd * 60;   
+    }
+    
+    if ((int)secsToAdd > 0) {
+        newSecsToAdd = (int)secsToAdd;
+        secsToAdd -= newSecsToAdd;
+    }
+    
+    decsToAdd = (int)(secsToAdd * 10);
+
+    // now we have to add them to currTime one at a time
+    // becausse if any of the currTime slots become more
+    // than 10/60/60 then we have to add them to the next
+    // highest interval
+    
+    // decimal
+    char prevDecimal[2];
+    prevDecimal[1] = 0;
+    prevDecimal[0] = startTime[9];
+    int newDecimal = atoi(prevDecimal) + decsToAdd;
+    
+    if (newDecimal >= 10) {
+        newSecsToAdd++;
+        newDecimal = newDecimal % 10;
+    }
+    
+    // seconds
+    char prevSeconds[3];
+    prevSeconds[0] = startTime[6];
+    prevSeconds[1] = startTime[7];
+    prevSeconds[2] = 0;
+    int newSeconds = atoi(prevSeconds) + newSecsToAdd;
+    
+    if (newSeconds >= 60) {
+        minutesToAdd++;
+        newSeconds = newSeconds % 60;
+    }
+
+    // minutes
+    char prevMinutes[3];
+    prevMinutes[0] = startTime[3];
+    prevMinutes[1] = startTime[4];
+    prevMinutes[2] = 0;
+    int newMinutes = atoi(prevMinutes) + minutesToAdd;
+    
+    if (newMinutes >= 60) {
+        hoursToAdd++;
+        newMinutes = newMinutes % 60;
+    }
+    
+    // hours
+    char prevHours[3];
+    prevHours[2] = 0;
+    prevHours[0] = startTime[0];
+    prevHours[1] = startTime[1];
+    int newHours = atoi(prevHours) + hoursToAdd;
+    newHours = newHours % 12;
+    
+    // no 00 o'clock, only 1 through 12
+    if (newHours == 0) {
+        newHours = 12;
+    }
+    
+    // now we have newDecimal, newSeconds, newMinutes, and newHours
+    // so we need to build up the string again
+    sprintf(resultTime, "%02d:%02d:%02d.%d",newHours,newMinutes,newSeconds,newDecimal);
+}
+
+// given the current time in the form HH:MM:SS.S
+// give me back the number of seconds in that number
+float currTimeSecs(char currentTime[]) {
+    // hours
+    char hours[3];
+    hours[2] = 0;
+    hours[0] = currentTime[0];
+    hours[1] = currentTime[1];
+    
+    // minutes
+    char minutes[3];
+    minutes[0] = currentTime[3];
+    minutes[1] = currentTime[4];
+    minutes[2] = 0;
+    
+    // seconds
+    char seconds[3];
+    seconds[0] = currentTime[6];
+    seconds[1] = currentTime[7];
+    seconds[2] = 0;
+    
+    // decimal
+    char decimal[2];
+    decimal[1] = 0;
+    decimal[0] = currentTime[9];
+    
+    return (atoi(hours)%12)*360.0 + (atoi(minutes)%60)*60.0 + (atoi(seconds)%60)*1.0 + (atoi(decimal)%10)*.1;
+}
+
+#endif
\ No newline at end of file