File_EOF()
File_EOF(), Bit
Return Value:
0: No, the end of the file has not been reached.
1: Yes, the end of the file has been reached.
Check if End of File (EOF) is Reached
File_EOF is a variable used to check if the end of a file (EOF) has been reached while reading a file. When a file is being read, it is important to detect when there is no more data to read, to avoid errors or infinite loops.
Example:
File_EOF()
Prevent Blocking Loop with EOF:
File_EOF() is useful to prevent situations where a program might get stuck in an infinite loop if the end of the file is not handled correctly. By checking File_EOF(), you can safely terminate file reading when all content has been processed.
When to Use:
• During file reading: Whenever you're reading a file, you can use File_EOF() to ensure that you don't attempt to read beyond the end of the file.
• Prevent blocking behavior: Checking EOF prevents your code from getting stuck in a read loop after the file ends.
Notes:
• Ensure that you call File_Open() before using File_EOF(), as this variable only applies to files that are open for reading.
• File_EOF() helps avoid errors like Read/Write error (RWError) when you try to read past the file’s content.
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TftSetUp(0) 'Set screen TftResetScreen(BLACK) 'Reset screen TftSetSndFont(0,0) 'Set Font0 While File_Init() <> cErrOK : Wend 'Initialize SD Card TftPrintSndString("Sd Initialization OK",1,0,0,1,GREEN,BLACK,0) 'Confirm Initialize SD Card While File_Open("Open.txt") <> cErrOK : Wend 'Open file Open.txt to edit data TftPrintSndString("Open Open.txt OK",1,0,2,1,GREEN,BLACK,0) 'Confirm Open.txt is open bCounter = 0 'Print position counter Do TftPrintSndChar(File_ReadByte(),1,bCounter,3,1,GREEN,BLACK,0) 'Print data as text If File_EOF() = 1 Then Break 'Loop till end of file Inc bCounter Loop File_Close() 'close file TftPrintSndString("Close Open.txt OK",1,0,4,1,GREEN,BLACK,0) 'Confirm close file |
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