🚀 go-pugleaf

>Does anyone know of any PD or commercial ASN.1 compilers that
>will run on a Sun SPARC?

Open Systems Solutions, Inc. (609-987-9073) has developed a commercial ASN.1 
compiler that runs under Sun OS (so Sun SPARC is supported), VAX/VMS, IBM MVS, 
AT&T System V Unix, Berkeley Unix, Apple Macintosh, MS-DOS, and several other 
operating systems.

To the best of my knowledge, the OSS compiler is the most complete 
implementation of ASN.1 that is currently available on the market.  
The features of the product include:

- support for the Type, Value, Subtype and Macro notations.  All changes to
  ASN.1 are currently reflected in the compiler, including the October 1990
  corrigenda.

- support for circular references within and between ASN.1 modules.

- supports ASN.1 as it is specified in ISO 8824 / CCITT X.208.  No 
  modifications are required to the abstract syntax (e.g., no need to 
  remove the Value, Subtype or Macro notations).

- highly descriptive messages

- outstanding error recovery in the OSS ASN.1 Syntax Checker/Macro Expander,
  including synchronization on assignment statements (results in the detection
  of multiple errors in a single run of the compiler) and context sensitive 
  spell checking of ASN.1 keywords.

- assurance of tag uniqueness wherever required, such as at all levels of a 
  CHOICE within a CHOICE within a CHOICE within a SET, etc.

- choice of a table-driven (interpretive) encoder/decoder or a compiler-
  generated encoder/decoder.  Both versions of the encoder/decoder employ
  the same interface, so that an application can switch from one to the 
  other by simply recompiling.

- comprehensive sanity checking in the decoder to guard against any invalid 
  data that is presented for decoding.

- choice of definite or indefinite length encoding.

- optional trapping of signals in the encoder to recover from system-detected 
  errors, such as bad pointers in the user data.

- error message (optionally) returned by the encoder/decoder that details the 
  cause of any error and identifies the field which was being encoded or 
  decoded when the error was detected.

- encoding (decoding) directly from (into) user's data structure; no
  intermediate steps used in encoding/decoding.

Bancroft Scott