asn1rt

MODULE

asn1rt

MODULE SUMMARY

ASN.1 runtime support functions

DESCRIPTION

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.

EXPORTS

decode(Module,Type,Bytes) -> {ok,Value}|{error,Reason}

Types:

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}

Types:

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}

Types:

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}

Types:

Reason = term()

This function is obsolete and will be removed in R16A

unload_driver() -> ok | {error,Reason}

Types:

Reason = term()

This function is obsolete and will be removed in R16A

utf8_binary_to_list(UTF8Binary) -> {ok,UnicodeList} | {error,Reason}

Types:

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}

Types:

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.