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| author | Filipe David Manana <[email protected]> | 2011-05-16 17:00:25 +0100 |
|---|---|---|
| committer | Filipe David Manana <[email protected]> | 2011-08-27 21:16:21 -0700 |
| commit | 1b2cea397131a36a39b18c6ce8c6944bf11db4c7 (patch) | |
| tree | e3f6ec427883d36e3ab8104ee73eb1c9c5966fcb /erts/doc/src | |
| parent | 9a52e239698ae62cddbc0d780502c72458867b6f (diff) | |
| download | otp-1b2cea397131a36a39b18c6ce8c6944bf11db4c7.tar.gz otp-1b2cea397131a36a39b18c6ce8c6944bf11db4c7.tar.bz2 otp-1b2cea397131a36a39b18c6ce8c6944bf11db4c7.zip | |
Add erlang:external_size/2 BIF
This BIF's second parameter is a list of options.
Currently the only allowed option is {minor_version, Version}
where version is either 0 (default) or 1.
Diffstat (limited to 'erts/doc/src')
| -rw-r--r-- | erts/doc/src/erlang.xml | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index ad7a57bd73..84d4160e6a 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -1035,6 +1035,56 @@ b</pre> </desc> </func> <func> + <name>erlang:external_size(Term) -> integer() >= 0</name> + <fsummary>Calculate the maximum size for a term encoded in the Erlang + external term format</fsummary> + <type> + <v>Term = term()</v> + </type> + <desc> + <p>Calculates, without doing the encoding, the maximum byte size for + a term encoded in the Erlang external term format. The following + condition applies always:</p> + <p> + <pre> +> <input>Size1 = byte_size(term_to_binary(Term)),</input> +> <input>Size2 = erlang:external_size(Term),</input> +> <input>true = Size1 =< Size2.</input> +true + </pre> + </p> + <p>This is equivalent to a call to: <code>erlang:external_size(Term, []) + </code></p> + </desc> + </func> + <func> + <name>erlang:external_size(Term, [Option]) -> integer() >= 0</name> + <fsummary>Calculate the maximum size for a term encoded in the Erlang + external term format</fsummary> + <type> + <v>Term = term()</v> + <v>Option = {minor_version, Version}</v> + </type> + <desc> + <p>Calculates, without doing the encoding, the maximum byte size for + a term encoded in the Erlang external term format. The following + condition applies always:</p> + <p> + <pre> +> <input>Size1 = byte_size(term_to_binary(Term, Options)),</input> +> <input>Size2 = erlang:external_size(Term, Options),</input> +> <input>true = Size1 =< Size2.</input> +true + </pre> + </p> + <p>The option <c>{minor_version, Version}</c> specifies how floats + are encoded. See + <seealso marker="#term_to_binary/2">term_to_binary/2</seealso> for + a more detailed description. + </p> + </desc> + </func> + <func> <name>float(Number) -> float()</name> <fsummary>Convert a number to a float</fsummary> <type> |