Coverting text files with binary file page code functionality

kolbe

Active Member
Licensed User
Hello all,

I needed to use an a 8-bit ascii (as in with diacritics, accents and the like) file with bassic4ppc so I had to figure out how to use the page code options in the binaryfile object. Don't know if this is the best way to do this but it works. There is not much of an explanation in the help files so thought this might be helpful to someone else.

tbin1 is the binfile object

To import a file:

B4X:
   'convert extended ascii to native utf-8
   FileOpen(c1,"ascii file.txt",cRandom)
   FileOpen(c2,"utf8 file.txt",cWrite)
   
   'use  1252 or 28591 for the ascii page code
   tbin1.New2(c1,1252)
   
   'read bytes
   length=FileSize("ascii file.txt")
   Dim temp_array(length) As byte
   tbin1.ReadBytes(temp_array(),length)

   'convert to string
   string=tbin1.BytesToString(temp_array(),0,length-1)
   
   'write string to a utf8 file
   FileWrite(c2,string)
   
   FileClose(c1)
   FileClose(c2)

To export a file:

B4X:
   'convert from native utf-8 to extended ascii
   FileOpen(c1,"ascii file.txt",cRandom)
   FileOpen(c2,"utf8 file.txt",cRead)
   
   'set page code to 1252 or 28591
   tbin1.New2(c1,1252)

   'get string from utf8 file
   string=FileReadToEnd(c2)

   'convert string to bytes
   length=StrLength(string)
   Dim temp_array(length) As byte
   temp_array()=tbin1.StringToBytes(string)

   'write bytes to ascii file
   tbin1.WriteBytes(temp_array())
   
   FileClose(c1)
   FileClose(c2)

use page code 1200 if you need to convert to/from utf16

Enjoy!
 
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