.TH ASN1C 1 "\*(Dt" "ASN.1 Compiler" "ASN.1 Compiler"
.SH NAME
asn1c \- ASN.1 Compiler
.SH SYNOPSIS
asn1c [\fB\-E\fR [\fB-F\fR] | \fB\-P\fR | \fB\-R\fR]
      [\fB\-S\fR\fIdir\fR] [\fB-X\fR]
      [\fB\-W\fR\fIdebug-\fR...] [\fB\-f\fR\fIoption\fR...] [\fB\-p\fR\fIrint-\fR...]
      \fIinfile\fR...
.SH DESCRIPTION
asn1c compiles the ASN.1 specifications into the set of
target language (C/C++) encoders and decoders for BER, DER, XER,
and other encoding standards.
.SH OPTIONS
.TP
\fIOverall Options\fR
\fB\-E \-F \-P \-R\fR
.BI "\-S " directory
\fB\-X
.TP
\fIWarning Options\fR
.br
\fB\-Werror \-Wdebug-lexer \-Wdebug-fixer \-Wdebug-compiler\fR
.TP
\fILanguage Options\fR
.br
\fB\-fall-defs-global \-fbless-SIZE \-fcompound-names \-findirect-choice
.BI "\-fknown-extern-type="<name>
\fB\-fnative-types \-fno-constraints \-fno-include-deps \-funnamed-unions \-ftypes88\fR
.TP
\fIOutput Options\fR
.br
.B \-print-constraints \-print-lines
.SH OVERALL OPTIONS
.TP
.B \-E
Stop after the parsing stage and print the reconstructed ASN.1
specification code to the standard output.
.TP
.B \-F
Used together with \c
.B \-E\c
, instructs the compiler to stop after the ASN.1 syntax
tree fixing stage and dump the reconstructed ASN.1 specification
to the standard output.
.TP
.B \-P
Dump the compiled output to the standard output instead of creating the
target language files on disk.
.TP
.B \-R
Restrict the compiler to generate only the ASN.1 tables,
omitting the usual support code.
.TP
\fB\-S\fR \fIdirectory\fR
Use the specified directory with ASN.1 skeleton files.
.TP
.B \-X
Generate the XML DTD schema for the specified ASN.1 files.
.SH WARNING OPTIONS
.TP
.B \-Werror
Treat warnings as errors; abort if any warning is produced.
.TP
.B \-Wdebug-lexer
Enable lexer debugging during the ASN.1 parsing stage.
.TP
.B \-Wdebug-fixer
Enable ASN.1 syntax tree fixer debugging during the fixing stage.
.TP
.B \-Wdebug-compiler
Enable debugging during the actual compile time.
.SH LANGUAGE OPTIONS
.TP
.B \-fall-defs-global
Normally the compiler hides the definitions (asn1_DEF_xxx) of the inner
structure elements (members of SEQUENCE, SET and other types). This option
makes all such definitions global.
Enabling this option may pollute the namespace by making lots of asn1_DEF_xxx
structures globally visible, but will allow you to manipulate
(encode and decode) the individual members of any complex ASN.1 structure.
.TP
.B \-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
an ASN.1 standard and compiler may fail to produce meaningful code.
.TP
.B \-fcompound-names
Using this switch 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).
.TP
.B \-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
.B \-fno-include-deps
to prevent circular references.
.TP
.BI "\-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.
.TP
.B \-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.
.TP
.B \-fno-constraints
Do not generate ASN.1 subtype constraint checking code. This may make a shorter executable.
.TP
.B \-fno-include-deps
Do not generate courtesy #include lines for non-critical type dependencies.
Helps prevent namespace collisions.
.TP
.B \-funnamed-unions
Enable unnamed unions in the definitions of target language's structures.
.TP
.B \-ftypes88
Pretend to support only ASN.1:1988 embedded types. Certain reserved words,
such as UniversalString and BMPString, become ordinary type references
and may be redefined by the specification.
.SH OUTPUT OPTIONS
.TP
.B \-print-constraints
When -EF are also specified, this option forces the compiler to explain
its internal understanding of subtype constraints.
.TP
.B \-print-lines
Generate "-- #line" comments in \fB-E\fR output.
.SH SEE ALSO
.TP
\&\fIunber\fR\|(1), \&\fIenber\fR\|(1)
.SH AUTHORS
Lev Walkin <vlm@lionet.info>