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Added feature: no new file if old file is zero bytes.

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See issue #136. Thank you dlkeng! You rock. Again. Thanks for adding
this feature. When starting in new log mode, if the LOG00256.txt is zero
bytes, OpenLog will use LOG00256 instead of LOG00257.
This commit is contained in:
Nathan Seidle 2013-07-15 22:19:06 -06:00
parent 3fe82cfb40
commit 45960c3d21
1 changed files with 17 additions and 5 deletions
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22
firmware/OpenLog_v3/OpenLog_v3.ino
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@ -428,17 +428,29 @@ char* newlog(void)
char new_file_name[13];
while(1)
{
sprintf_P(new_file_name, PSTR("LOG%05d.TXT"), new_file_number); //Splice the new file number into this file name
//Try to open file, if fail (file doesn't exist), then break
if (newFile.open(&currentDirectory, new_file_name, O_CREAT | O_EXCL | O_WRITE)) break;
//Try to open file and see if it is empty. If so, use it.
if (newFile.open(&currentDirectory, new_file_name, O_READ))
{
if (newFile.fileSize() == 0)
{
newFile.close(); // Close this existing file we just opened.
return(new_file_name); // Use existing empty file.
}
newFile.close(); // Close this existing file we just opened.
}
//Try the next number
new_file_number++;
if(new_file_number > 65533) //There is a max of 65534 logs
{
NewSerial.print(F("!Too many logs:2!"));
return(0); //Bail!
}
sprintf_P(new_file_name, PSTR("LOG%05d.TXT"), new_file_number); //Splice the new file number into this file name
//Try to open file, if fail (file doesn't exist), then break
if (newFile.open(&currentDirectory, new_file_name, O_CREAT | O_EXCL | O_WRITE)) break;
}
newFile.close(); //Close this new file we just opened