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Man Pages


Manual Reference Pages  -  ASN1C (1)

NAME

asn1c - ASN.1 Compiler

CONTENTS

Synopsis
Description
Options
Overall Options
Warning Options
Language Options
Codecs Generation Options
Output Options
See Also
Authors

SYNOPSIS

asn1c [-E [-F] | -P | -R]
[-Sdir] [-X]
[-Wdebug-...] [-foption] [-gen-option] [-pdu={all|auto|Type}]
[-print-option]
infile...

DESCRIPTION

asn1c compiles ASN.1 specifications into a set of target language (C/C++) encoders and decoders for BER, DER, PER, XER and other encoding rules.

OPTIONS

Overall Options
  -E -F -P -R -S directory -X
Warning Options
  -Werror -Wdebug-lexer -Wdebug-fixer -Wdebug-compiler
Language Options
  -fbless-SIZE -fcompound-names -findirect-choice -fknown-extern-type=<name> -fnative-types -fno-constraints -fno-include-deps -funnamed-unions -fskeletons-copy
Codecs Generation Options
  -gen-PER -pdu={all|auto|Type}
Output Options
  -print-constraints -print-lines

OVERALL OPTIONS

-E Stop after the parsing stage and print the reconstructed ASN.1 specification code to the standard output.
-F Used together with -E , instructs the compiler to stop after the ASN.1 syntax tree fixing stage and dump the reconstructed ASN.1 specification to the standard output.
-P Dump the compiled output to the standard output instead of creating the target language files on disk.
-R Restrict the compiler to generate only the ASN.1 tables, omitting the usual support code.
-S directory
  Use the specified directory with ASN.1 skeleton files.
-X Generate an XML DTD schema for the specified ASN.1 files.

WARNING OPTIONS

-Werror Treat warnings as errors; abort if any warning is produced.
-Wdebug-lexer
  Enable lexer debugging during the ASN.1 parsing stage.
-Wdebug-fixer
  Enable ASN.1 syntax tree fixer debugging during the fixing stage.
-Wdebug-compiler
  Enable debugging during the actual compile time.

LANGUAGE OPTIONS

-fbless-SIZE
  Allow SIZE() constraint for INTEGER, ENUMERATED, and other types for which this constraint is normally prohibited by the standard. This is a violation of ASN.1 standard, and the compiler may fail to produce a meaningful code.
-fcompound-names
  Using this option prevents name collisions in the target source code by using complex names for target language structures. (Name collisions may occur if the ASN.1 module reuses the same identifiers in multiple contexts).
-findirect-choice
  When generating code for a CHOICE type, compile the CHOICE members as indirect pointers instead of declaring them inline. Consider using this option together with -fno-include-deps to prevent circular references.
-fknown-extern-type=<name>
  Pretend the specified type is known. The compiler will assume the target language source files for the given type have been provided manually.
-fnative-types
  Use the native machine’s data types (int, double) whenever possible, instead of the compound INTEGER_t, ENUMERATED_t and REAL_t types.
-fno-constraints
  Do not generate ASN.1 subtype constraint checking code. This may make a shorter executable.
-fno-include-deps
  Do not generate courtesy #include lines for non-critical type dependencies. Helps prevent namespace collisions.
-funnamed-unions
  Enable unnamed unions in the definitions of target language’s structures.
-fskeletons-copy
  Copy support files (skeletons) rather than symlink them.

CODECS GENERATION OPTIONS

-gen-PER Generate Packed Encoding Rules (PER) support code.
-pdu={all|auto|Type}
  Create a PDU table for specified types, or discover Protocol Data Units automatically. In case of -pdu=all, all ASN.1 types defined in all modules will form a PDU table. In case of -pdu=auto, all types not referenced by any other type will form a PDU table. If Type is an ASN.1 type identifier, it is added to a PDU table. The last form may be specified multiple times to add any number of PDUs.

OUTPUT OPTIONS

-print-constraints
  When -EF are also specified, this option forces the compiler to explain its internal understanding of subtype constraints.
-print-lines
  Generate "-- #line" comments in -E output.

SEE ALSO

unber(1), enber(1)
 

AUTHORS

Lev Walkin <vlm@lionet.info>
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ASN.1 Compiler ASN1C (1) *(Dt

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