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Reads text from file.
Component | Version | macOS | Windows | Linux | Server | iOS SDK |
BinaryFile | 7.3 | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
Parameter | Description | Example | Flags |
---|---|---|---|
BinaryFileRef | The reference number for the open file. | $FH | |
ByteCount | The number of Bytes to read. | 1000 | |
Encoding | The text encoding for result. Default is native. This function can also handle UTF-16 as well as UTF-16LE and UTF-16BE for little/big endian byte order. Possible encoding names: ANSI, ISO-8859-1, Latin1, Mac, Native, UTF-8, DOS, Hex, Base64 or Windows. More listed in the FAQ. |
UTF8 | Optional |
Returns OK or error.
Read some text:
Set Variable [ $fh ; Value: MBS( "BinaryFile.Open"; "/Users/cs/Desktop/test.txt" ) ]
Set Variable [ $len ; Value: MBS("BinaryFile.Length"; $fh) ]
Set Variable [ $text ; Value: MBS( "BinaryFile.ReadText"; $fh; $len; "UTF-8" ) ]
Set Field [ test::ContainerField ; $text ]
Set Variable [ $r ; Value: MBS( "BinaryFile.Close"; $fh) ]
PNG file check:
// returns 1 if file is most likely a PNG as it starts with right bytes.
// for a CF, path may be a parameter.
Let ( [
path = "/Users/cs/Pictures/test.png";
stream = MBS( "BinaryFile.Open"; path );
text = MBS( "BinaryFile.ReadText"; stream; 10; "Windows" );
r = MBS( "BinaryFile.Close"; stream;);
IsPNG = (Position ( text; "PNG"; 1; 1 ) = 2)
]; IsPNG )
PDF file check:
// returns 1 if file is most likely a PDF as it starts with right bytes.
// for a CF, path may be a parameter.
Let ( [
path = "/Users/cs/Pictures/test.png";
stream = MBS( "BinaryFile.Open"; path );
text = MBS( "BinaryFile.ReadText"; stream; 4; "Windows" );
r = MBS( "BinaryFile.Close"; stream;);
IsPDF = (text == "%PDF")
]; IsPDF )
This function checks for a license.
Created 12nd June 2017, last changed 1st June 2023