diff options
Diffstat (limited to 'lib/erl_interface/doc')
| -rw-r--r-- | lib/erl_interface/doc/src/ei.xml | 61 |
1 files changed, 54 insertions, 7 deletions
diff --git a/lib/erl_interface/doc/src/ei.xml b/lib/erl_interface/doc/src/ei.xml index f081ca926a..254ae27cc8 100644 --- a/lib/erl_interface/doc/src/ei.xml +++ b/lib/erl_interface/doc/src/ei.xml @@ -183,6 +183,35 @@ typedef enum { </func> <func> + <name since="OTP @OTP-15712@"><ret>int</ret><nametext>ei_decode_bitstring(const char *buf, int *index, void *p, size_t plen, size_t *bitsp)</nametext></name> + <fsummary>Decode a bitstring.</fsummary> + <desc> + <p>Decodes a bitstring from the binary format.</p> + <taglist> + <tag><c>p</c></tag> + <item><p>Either <c>NULL</c> or points to a buffer where the bytes of the + bitstring will be written.</p> + </item> + <tag><c>plen</c></tag> + <item><p>The max size of the bitstring in <em>bytes</em>, that is the + size of the buffer if <c>p != NULL</c>.</p> + </item> + <tag><c>*bitsp</c></tag> + <item><p>If <c>bitsp</c> is not <c>NULL</c>, set to the actual + number of <em>bits</em> of the bitstring.</p> + </item> + </taglist> + <p>Returns <c>0</c> if it was a bitstring no longer than <c>plen</c> + bytes. The actual length of the bitstring will be + <c>(*bitsp+7)/8</c> bytes. If <c>(*bitsp % 8) > 0</c> only the high + <c>(*bitsp % 8)</c> bits of the last byte are significant.</p> + <p>Number of bits may be divisible by 8, which means a binary + decodable by <c>ei_decode_binary</c> is also decodable by + <c>ei_decode_bitstring</c>.</p> + </desc> + </func> + + <func> <name since=""><ret>int</ret><nametext>ei_decode_boolean(const char *buf, int *index, int *p)</nametext></name> <fsummary>Decode a boolean.</fsummary> <desc> @@ -349,8 +378,10 @@ typedef enum { <c>t</c> is actually an <c>ETERM**</c> (see <seealso marker="erl_eterm"><c>erl_eterm</c></seealso>). The term is later to be deallocated.</p> - <p>Notice that this function is located in the <c>Erl_Interface</c> - library.</p> + <note><p>This function is deprecated as of OTP 22 and will be removed in + OTP 23 together with the old legacy <c>erl_interface</c> library (functions + with prefix <c>erl_</c>).</p> + </note> </desc> </func> @@ -459,6 +490,18 @@ typedef enum { </func> <func> + <name since="OTP @OTP-15712@"><ret>int</ret><nametext>ei_encode_bitstring(char *buf, int *index, const void *p, size_t bits)</nametext></name> + <name since="OTP @OTP-15712@"><ret>int</ret><nametext>ei_x_encode_bitstring(ei_x_buff* x, const void *p, size_t bits)</nametext></name> + <fsummary>Encode a bitstring.</fsummary> + <desc> + <p>Encodes a bitstring in the binary format. The data is at + <c>p</c>. The size of the data is <c>bits</c> bits or + <c>(bits+7)/8</c> bytes. If <c>(bits%8) > 0</c> only the high + <c>(bits%8)</c> bits of the last byte are significant.</p> + </desc> + </func> + + <func> <name since=""><ret>int</ret><nametext>ei_encode_boolean(char *buf, int *index, int p)</nametext></name> <name since=""><ret>int</ret><nametext>ei_x_encode_boolean(ei_x_buff* x, int p)</nametext></name> <fsummary>Encode a boolean.</fsummary> @@ -656,6 +699,10 @@ ei_x_encode_string(&x, "Banana");</pre> <c>erl_interface</c>. Parameter <c>t</c> is actually an <c>ETERM</c> pointer. This function does not free the <c>ETERM</c>.</p> + <note><p>These functions are deprecated as of OTP 22 and will be removed in + OTP 23 together with the old legacy <c>erl_interface</c> library + (functions with prefix <c>erl_</c>).</p> + </note> </desc> </func> <func> @@ -725,12 +772,12 @@ ei_encode_tuple_header(buf, &i, 0);</pre> <name since=""><ret>int</ret><nametext>ei_get_type(const char *buf, const int *index, int *type, int *size)</nametext></name> <fsummary>Fetch the type and size of an encoded term.</fsummary> <desc> - <p>Returns the type in <c>type</c> and size in - <c>size</c> of the encoded term. For strings and atoms, + <p>Returns the type in <c>*type</c> and size in + <c>*size</c> of the encoded term. For strings and atoms, size is the number of characters <em>not</em> including the - terminating <c>NULL</c>. For binaries, <c>size</c> is the number of - bytes. For lists and tuples, <c>size</c> is the arity of - the object. For other types, <c>size</c> is 0. In all + terminating <c>NULL</c>. For binaries and bitstrings, <c>*size</c> is + the number of bytes. For lists, tuples and maps, <c>*size</c> is the + arity of the object. For other types, <c>*size</c> is 0. In all cases, <c>index</c> is left unchanged.</p> </desc> </func> |