diff options
| -rw-r--r-- | lib/asn1/doc/src/asn1_ug.xml | 39 |
1 files changed, 24 insertions, 15 deletions
diff --git a/lib/asn1/doc/src/asn1_ug.xml b/lib/asn1/doc/src/asn1_ug.xml index fb379214fc..1da4cce5a9 100644 --- a/lib/asn1/doc/src/asn1_ug.xml +++ b/lib/asn1/doc/src/asn1_ug.xml @@ -720,24 +720,33 @@ TextFileVal2 = [88,76,55,44,99,121 .......... a lot of characters here ....] characters are all represented by quadruples beginning with three zeros like {0,0,0,65} for the 'A' character. When decoding a value for these strings the result is a list of - quadruples, or integers when the value is an ASCII character. - The following example shows how it works:</p> - <p>In a file <c>PrimStrings.asn1</c> the type <c>BMP</c> is defined as - <br></br> -<c>BMP ::= BMPString</c> then using BER encoding (<c>ber</c> - option)the input/output format will be:</p> + quadruples, or integers when the value is an ASCII character.</p> + + <p>The following example shows how it works. We have the following + specification in the file <c>PrimStrings.asn1</c>.</p> + <pre> +PrimStrings DEFINITIONS AUTOMATIC TAGS ::= +BEGIN + BMP ::= BMPString +END + </pre> + + <p>Encoding and decoding some strings:</p> + <pre> -1> <input>{ok,Bytes1} = 'PrimStrings':encode('BMP', [{0,0,53,53},{0,0,45,56}]).</input> -{ok,[30,4,"55-8"]} -2> <input>'PrimStrings':decode('BMP', list_to_binary(Bytes1)).</input> +1> <input>asn1ct:compile('PrimStrings', [ber]).</input> +ok +2> <input>{ok,Bytes1} = 'PrimStrings':encode('BMP', [{0,0,53,53},{0,0,45,56}]).</input> +{ok,<<30,4,53,54,45,56>>} +3> <input>'PrimStrings':decode('BMP', Bytes1).</input> {ok,[{0,0,53,53},{0,0,45,56}]} -3> <input>{ok,Bytes2} = 'PrimStrings':encode('BMP', [{0,0,53,53},{0,0,0,65}]).</input> -{ok,[30,4,[53,53,0,65]]} -4> <input>'PrimStrings':decode('BMP', list_to_binary(Bytes2)).</input> +4> <input>{ok,Bytes2} = 'PrimStrings':encode('BMP', [{0,0,53,53},{0,0,0,65}]).</input> +{ok,<<30,4,53,53,0,65>>} +5> <input>'PrimStrings':decode('BMP', Bytes2).</input> {ok,[{0,0,53,53},65]} -5> <input>{ok,Bytes3} = 'PrimStrings':encode('BMP', "BMP string").</input> -{ok,[30,20,[0,66,0,77,0,80,0,32,0,115,0,116,0,114,0,105,0,110,0,103]]} -6> <input>'PrimStrings':decode('BMP', list_to_binary(Bytes3)).</input> +6> <input>{ok,Bytes3} = 'PrimStrings':encode('BMP', "BMP string").</input> +{ok,<<30,20,0,66,0,77,0,80,0,32,0,115,0,116,0,114,0,105,0,110,0,103>>} +7> <input>'PrimStrings':decode('BMP', Bytes3).</input> {ok,"BMP string"} </pre> <p>The UTF8String is represented in Erlang as a list of integers, where each integer represents the unicode value of one |