Itai,
>Is there a formula to convert ASCII to EBCDIC or should I use tables?
No, there is no (simple) formula to convert ASCII to EBCDIC. First, you need
to determine which EBCDIC (and ASCII) Code Page(s) to use -- even if you
only need to use "pure" 7-bit ASCII as your source. Then you need to use the
appropriate lookup table to convert each byte separately.
>I need to transmit a file (that also includes TIFF image) in EBCDIC.
Based on what encoding for the transfer of the TIFF image is expected by the
receiver -- Base64, BinHex, Uuencoded, Quoted-printable, etc. -- you might
need to use the extended ASCII set (dec 0-255 / hex 00-FF), which makes it
even more complicated and dependent on the specified code page(s).
For example, braces (or curly brackets) "{" and "}", the less-than "<" and
greater-than ">", as well as the backslash "\", tilde "~" and circumflex "^"
characters don't exist in "basic" EBCDIC, and are at completely different
positions in various EBCDIC Code Pages. Also, many other punctuation marks
are moved around a lot between Code Pages. So, determining and specifying
the used EBCDIC Code Pages is essential when converting from (and to) ASCII!
For some examples and links to various EBCDIC code-page tables, see:
* https://en.wikipedia.org/wiki/EBCDIC_code_pages
* https://en.wikipedia.org/wiki/Binary-to-text_encoding
Hope that helps,
Andreas
Andreas Gehrs-Pahl
Absolute Software, LLC
phone: (989) 723-9927
email: Andreas@AbsoluteSoftwareLLC.com
web: http://www.AbsoluteSoftwareLLC.com
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