19972011 Ericsson AB. All Rights Reserved. The contents of this file are subject to the Erlang Public License, Version 1.1, (the "License"); you may not use this file except in compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. asn1rt Kenneth Lundin Kenneth Lundin 1 Kenneth Lundin 97-10-04 A asn1.sgml
asn1rt ASN.1 runtime support functions

This module is the interface module for the ASN.1 runtime support functions. To encode and decode ASN.1 types in runtime the functions in this module should be used.

 decode(Module,Type,Bytes) -> {ok,Value}|{error,Reason} Decode from bytes into an ASN.1 value. Module = Type = atom() Value = Reason = term() Bytes = binary | [Int] when integer(Int), Int >= 0, Int =< 255 | binary

Decodes Type from Module from the list of bytes or binary Bytes. If the module is compiled with ber_bin or per_bin option Bytes must be a binary. Returns {ok,Value} if successful.

 encode(Module,Type,Value)-> {ok,BinOrList} | {error,Reason} Encode an ASN.1 value. Module = Type = atom() Value = term() BinOrList = Bytes | binary() Bytes = [Int|binary|Bytes] when integer(Int), Int >= 0, Int =< 255 Reason = term()

Encodes Value of Type defined in the ASN.1 module Module. Returns a possibly nested list of bytes and or binaries if successful. If Module was compiled with the options per_bin and optimize the result is a binary. To get as fast execution as possible the encode function only performs rudimentary tests that the input Value is a correct instance of Type. The length of strings is for example not always checked.

info(Module) -> {ok,Info} | {error,Reason} Returns compiler information about the Module. Module = atom() Info = list() Reason = term()

info/1 returns the version of the asn1 compiler that was used to compile the module. It also returns the compiler options that was used.

 load_driver() -> ok | {error,Reason} Loads the linked-in driver. (deprecated) Reason = term()

This function is obsolete and will be removed in R16A

 unload_driver() -> ok | {error,Reason} Unloads the linked-in driver. (deprecated) Reason = term()

This function is obsolete and will be removed in R16A

 utf8_binary_to_list(UTF8Binary) -> {ok,UnicodeList} | {error,Reason} Transforms an utf8 encoded binary to a unicode list. UTF8Binary = binary() UnicodeList = [integer()] Reason = term()

utf8_binary_to_list/1 Transforms a UTF8 encoded binary to a list of integers, where each integer represents one character as its unicode value. The function fails if the binary is not a properly encoded UTF8 string.

 utf8_list_to_binary(UnicodeList) -> {ok,UTF8Binary} | {error,Reason} Transforms an unicode list ot an utf8 binary. UnicodeList = [integer()] UTF8Binary = binary() Reason = term()

utf8_list_to_binary/1 Transforms a list of integers, where each integer represents one character as its unicode value, to a UTF8 encoded binary.