You can edit this page using wiki syntax for markup.

Article contents:== msgpack [[toc:]] An implementation of [[http://msgpack.org/|MessagePack]] for [[https://www.call-cc.org/|CHICKEN scheme v6]]. === CHICKEN 5 notes Forked from [[http://github.com/hugoArregui/msgpack-scheme|msgpack-scheme]] and partially rewritten (ported to CHICKEN 5 and cleaned up, later ported to CHICKEN v6). I kept the original license and most of the original API. However the byte-blob have been replaced with Chicken 5 native blob. I removed the dependency on bind egg and the need for C++ code using built-ins features of C5. === CHICKEN 6 notes Migrated to C6 bytevectors and UTF-8 strings. === Authors ; Hugo Arregui : Original author of the egg. ; Théo Cavignac : ported the egg to Chicken 5 ; Stanislav Kljuhhin : ported the egg to Chicken 6 === Repository Find the code at [[https://github.com/Lattay/chicken-msgpack|github.com]]. === Requirements This package requires the following eggs: * matchable * srfi-1 * srfi-69 === Installation Through {{Chicken egg repository}}: Run {{chicken-install -s msgpack}} anywhere. From source: First install the required eggs listed above. Then clone this [[https://github.com/Lattay/chicken-msgpack|repository]]. Finally run {{chicken-install -s}} in the root of this repository. === API Specification Primitive pack-family procedures: <enscript highlight="scheme"> (pack-uint port value) ; will produce an error if the input is negative (pack-sint port value) (pack-float port FLONUM) ; pack 32b floats, support both exact and inexact but convert to flonum (inexact) anyway (pack-double port FLONUM) ; pack 64b floats, same limitations as above (pack-bin port BLOB) ; chicken.blob byte blob (pack-str port STRING) ; string (pack-array port VECTOR) ; scheme vector, also support lists (pack-map port HASH-TABLE) ; srfi-69 hash-table (pack-ext port EXT) ; extension (see below) </enscript> Also the simplest way to use is to use the generic procedures: <enscript highlight="scheme"> (pack port value) (pack/bytevector value) </enscript> These procedures will call primitive type packers, with the following rules: - if the value has a packer, apply it. - if the value is a string, it will be packed as str. - if the value is a blob, it will be packed as bin. - if the value is a char, it will be packed as a uint. - if the value is a list, it will be packed as an array. - if the value is a extension (see below), it will be packed as an ext The {{/bytevector}} version return a u8vector of packed data, the others directly write it to the port. Unpack procedures: <enscript highlight="scheme"> (unpack port [mapper]) (unpack/bytevector bv [mapper]) </enscript> The optional mapper argument is applied to the output before returning. The {{/bytevector}} version unpack the content of u8vector instead of reading from a port. === Extension Extension is a record defined as: {{ (define-record extension type data) }} * type: integer from 0 to 127 * data: a bytevector Example: <enscript highlight="scheme"> (make-extension 10 (string->utf8 "hi")) </enscript> === License Distributed under the New BSD License. === History v2.0.0 Port to Chicken 6 by Stanislav Kljuhhin (see [[https://github.com/Lattay/chicken-msgpack/pull/3]]) v1.0.4 Bug fix concerning exact number (see [[https://github.com/Lattay/chicken-msgpack/issues/1]]) v1.0.3 Ironing details for publication. v1.0.0 Port to Chicken 5. Breaking changes: All blob related APIs have been changed to support Chicken native blob type. v0.4 Last Chicken 4 version (2016) Description of your changes:

I would like to authenticate

Spam control

What do you get when you multiply 8 by 4?