working on vt52 and some cleanup

1 files changed, 87 insertions, 0 deletions

diff --git a/xxx/font/binarize.py b/xxx/font/binarize.py
new file mode 100644
index 0000000..1abb9d6
--- /dev/null
+++ b/xxx/font/binarize.py
@@ -0,0 +1,87 @@
+import sys
+
+def binarize(file_in, file_out):
+
+    """ Create a binary file from an ASCII file. Everything 
+        but '0' and '1' (alternatively '_' and 'X') is ignored 
+        from the input file. """
+
+    print ("binarizing " + file_in + " to "+ file_out + ".")
+    
+    try:
+
+        f=open(file_in,'r')
+
+        try:
+
+            o=open(file_out,'wb')
+
+            try:
+
+                while True:
+
+                    b=readnext(f)
+                    if b==-1:
+                        break
+
+                    o.write(bytes([b]))
+
+            except IOError:
+                print("IOError happened during processing.");
+                print("I am closing the input and ouput files and aborting.");
+                print("Warning: The output file is very likely incomplete.");
+
+            o.close()
+
+        except IOError:
+            print("IOError opening output file: " + file_out);
+
+        f.close()
+
+    except IOError:
+        print("IOError opening input file: " + file_in);
+
+
+def readnext(f):
+
+    """ Read next 'byte' from the given ASCII file (BufferedWriter)
+        everything but '_','X','0','1' is ignored. 
+        Returns the byte as integer or -1 on EOF """
+
+    l=0 
+    b=""
+
+    while l<8:
+
+        c=f.read(1)
+
+        if not c:
+            return -1
+
+        if c=="0" or c=='_':
+            l+=1
+            b+="0"
+
+        if c=="1" or c=='X':
+            l+=1
+            b+="1"
+
+    return  int(b,2)
+
+def usage():
+
+    """ Prints usage information to sdtout """
+
+    print ("python3.x binarize.py [file_in] [file_out]")
+
+
+
+""" direct use """
+
+if __name__ == "__main__":
+
+    if(len(sys.argv)==3):
+        binarize(sys.argv[1],sys.argv[2])
+    else:
+        usage()
+