Digraph conversion script

[Ingo Blank]

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Hi,

I was recently in need for converting calculator ASCII files written in
user RPL (with embedded digraphs) to their corresponding HP character
representations for further processing on the PC. This small Python
script does exactly that. Maybe someone has use for it ...

<code>

#!/usr/bin/env python

# CONVERT ASCII FILES WITH EMBEDDED HP CALC DIGRAPHS TO
# THEIR ACCORDING CHARACTER REPRESENTATIONS AND WRITE
# TO STDOUT.

# USAGE: hp_digraphs filename.asc| - > out.hpe

REV = "$Id: hp_digraphs.py 395 2007-06-10 16:14:26Z ingo $"

import re,sys

hp_chars = {'<>':128,'x-':129,'.V':130,'v/':131,'.S':132,'GS':133,'|>':134,
'pi':135,'.d':136,'<=':137,'>=':138,'=/':139,'Ga':140,'->':141,
'<-':142,'|v':143,'|^':144,'Gg':145,'Gd':146,'Ge':147,'Gn':148,
'Gh':149,'Gl':150,'Gr':151,'Gs':152,'Gt':153,'Gw':154,'GD':155,
'PI':156,'GW':157,'[]':158,'oo':159,'<<':171,'^o':176,'Gm':181,
'>>':187,'.x':215,'0/':216,'Gb':223,':-':247}

digraphs = hp_chars.keys()

f = sys.argv[1]
if f == '-':
# READ FROM STDIN WHEN FILENAME IS "-".
# DOESN'T WORK WITH WINDOZE COMMAND PROMPT PIPES ...
# OKAY ON ALL *X PLATFORMS, THOUGH.
inp = sys.stdin
else:
inp = open(f,"r")

s = inp.read()

t = []

p = 0
S = len(s)
while p < S:
if s[p] == '\\':
d = s[p+1:p+3]
if d in digraphs:
t.append(chr(hp_chars[d]))
p += 3
else:
if re.match('\d{3}',s[p+1:p+4]):
t.append(chr(int(s[p+1:p+4])))
p += 4
else:
raise "invalid digraph '%s' detected" % d

else:
t.append(s[p])
p += 1

T = ''.join(t)

# WRITE CONVERTED TEXT TO STDOUT
print T

</code>

- --
Ingo Blank

http://hpgcc.org
http://blog.hpgcc.org
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[John H Meyers]

A related PC utilty:

http://www.hpcalc.org/details.php?id=3671
http://www.hpcalc.org/hp48/pc/emulators/hpbinasc.zip

Another converter which can be used on a Windows PC
(and which also includes "\\" -> "\")
is a program called "Emu48," aided by

\<< \->STR 3 TRANSIO RCLF SIZE 3 >
#2F34Dh #3016Bh IFTE SYSEVAL + \>> 'KINV' STO

Drag (or paste) text file to Emu48 (goes on stack);
invoke program, copy result from stack to clipboard.

Actually, if you want to preserve CRLF
(not change line endings to LF alone), then:

\<< \->STR 3 TRANSIO RCLF SIZE 3 >
#2F34Dh #3016Bh IFTE SYSEVAL + 1 TRANSIO
RCLF SIZE 3 > #2F34Fh #2FEC9h IFTE SYSEVAL \>> 'KINVCR' STO

Emu48:
http://www.hpcalc.org/hp48/pc/emulators/
http://www.hpcalc.org/hp49/pc/emulators/

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