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asn1c
Commits
f16d60b7
Commit
f16d60b7
authored
Sep 05, 2004
by
Lev Walkin
Browse files
added reference to FAQ
parent
e057ca34
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README
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f16d60b7
...
...
@@ -6,22 +6,23 @@ For quick installation tips read INSTALL.
For more complete documentation on this compiler and on using the
results of compilation please look into ./doc directory.
Please also read the FAQ file.
An excellent book on ASN.1 is written by Olivier Dubuisson:
"ASN.1 Communication between heterogeneous systems", ISBN:0-12-6333361-0.
QUICK START
===========
After building [and installing] the compiler (see INSTALL), you may use
the asn1c command to compile the ASN.1 specification:
asn1c <
spec
.asn1>
asn1c <
module
.asn1>
If several specifications contain interdependencies, all of them must be
specified:
asn1c <
spec
1.asn1> <
spec
2.asn1> ...
asn1c <
module
1.asn1> <
module
2.asn1> ...
The ./examples directory contains several ASN.1 modules and a script to
extract ASN.1 modules from RFC documents. To compile X.509 PKI module:
...
...
@@ -30,8 +31,8 @@ extract ASN.1 modules from RFC documents. To compile X.509 PKI module:
In this example, -P option is used to instruct the compiler to print the
compiled text on the standard output instead of creating multiple .c
and .h files for every ASN.1 type found inside the specified
fi
les.
This is useful for debugging and test
s
automation.
and .h files for every ASN.1 type found inside the specified
ASN.1 modu
les.
This is useful for debugging and test automation.
The compiler -E and -EF options are used for testing the parser and
the semantic fixer, respectively. These options will instruct the compiler
...
...
@@ -40,7 +41,7 @@ to dump out the parsed (and fixed) ASN.1 specification as it was
whether a particular syntactic construction is properly supported
by the compiler.
asn1c -EF <
spec
-to-test.asn1>
asn1c -EF <
module
-to-test.asn1>
MODEL OF OPERATION
...
...
@@ -49,10 +50,10 @@ MODEL OF OPERATION
The asn1c compiler works by processing the ASN.1 module specification
in several stages:
1. In the first stage, the ASN.1 file is parsed.
(Parsing produces an ASN.1 syntax tree for the subsequent levels
.
)
(Parsing produces an ASN.1 syntax tree for the subsequent levels)
2. In the second stage, the syntax tree is "fixed".
(Fixing is
done by
checking the tree for semantic errors
a
nd by transforming the tree
into the canonical
representation.
)
(Fixing is
a process of
checking the tree for semantic errors
,
a
ccompanied by the tree transformation
into the canonical
form
)
3. In the third stage, the syntax tree is compiled into the target language.
There are several command-line options reserved for printing the results
...
...
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