sd_log.cpp File Reference

#include "sd_log.h"

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Functions
String	newfile (String fname, String suffix)
	Avoids file conflicts by renaming. More...

Function Documentation

newfile()

String newfile	(	String	fname,
		String	suffix = ".csv"
	)

Avoids file conflicts by renaming.

Checks if the filename exists. If so, appends an integer. For example, if "test.csv" and "test(01).csv" are present in the file system and you call String x = newfile("test"); x will contain the string "test(02).csv"

Parameters

fname	The desired file name (without the extension)
suffix	The file extension

Returns

the new filename it came up with.

Definition at line 5 of file sd_log.cpp.

                                             {
  String temp = fname + suffix; //< Start with the name provided
  int i = 0;
  // Try appending a number
  while(sd.exists(temp.c_str())){
    // If the first number didn't work, keep trying
    // Note that this will hang if 00 through 99 are all taken
    ++i;
    char ones = i%10 + '0';
    char tens = i/10 + '0';
    temp = fname + '(' + tens + ones + ')' + suffix;
  }
  return temp;
}