From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Thu, 27 Apr 2023 09:59:33 +0000 (+1000)
Subject: recovered
X-Git-Url: https://git.rrq.au/?a=commitdiff_plain;p=rrq%2Flsp-utils.git

recovered
---

diff --git a/lsp-misc/lsp-misc.a.8.adoc b/lsp-misc/lsp-misc.a.8.adoc
index 670af48..7f8a5d0 100644
--- a/lsp-misc/lsp-misc.a.8.adoc
+++ b/lsp-misc/lsp-misc.a.8.adoc
@@ -1 +1,138 @@
-== lsp-misc.a(8)
+= lsp-misc.a(8)
+:doctype: manpage
+:revdate: {sys:date "+%Y-%m-%d %H:%M:%S"}
+
+== NAME
+
+lsp-misc.a - Misceallaneous useful functions.
+
+== SYNOPSIS
+
+.With packnl (example)
+packnl _main.lsp_ *-A lsp-misc.a*
+
+
+.With incore.lsp
+(load "incore.lsp") +
+(archive "lsp-misc.a") +
+(load "misc.lsp")
+
+== DESCRIPTION
+
+*lsp-misc.a* provides a few global utility functions.
+
+=== misc.lsp API
+
+(prog1 [_term_]*)::
+
+The *prog1* function is like a *begin* function except that it returns
+the value of the first term rather than the last.
+
+(die _N_ [_term_]*)::
+
+The *die* function printes to stderr the join of term values as
+strings with space separation, and if _N_ is a number, then the
+function exits the program with that return code.
++
+.Example of stderr logging
+(die nil 'This "is" 'printed "to stderr")
+
+(octal-byte _B_)::
+Print binary byte as octal or as ASCII character [32-126].
+
+(octals-string _S_)::
+Print string as a succesion of +octal-byte+.
+
+(human-byte _B_)::
+Return byte code as printable (string) or as code (number).
+
+(human-bytes _BL_)::
+
+Return a list of human-byte elements from a list of byte codes but
+also joining consecutive string elements to form packed strings.
+
+=== foop.lsp API
+
+This newlisp module provides Functional Object-Oriented Programming
+(FOOP) modelling support.
+
+FOOP is an abstraction overlay using the newlisp context notion as a
+simile to the _class_ notion in genuine object-oriented programming
+languages. This is set out in newlisp by means of the representation
+principle that an instance of a FOOP "class" (i.e. context) is a list
+headed by the context itself, and followed by the "member values".
+
+FOOP further includes by the "method invocation" syntax where a
+function is preceded by ':' and then followed by the instance
+concerned before actual function arguments. That instance is then
+stoved away as implicitly available via the (self) function, and the
+member values accessible via index, e.g. the term (self 3) refers to
+the third member of the instance. The self references are
+destructively assignable with setf.
+
+This modelling support adds member name declaration together with
+automatic getter and setter defintions. The (FOOP ...) term is used
+for declaring member names in order. For example:
+
+(FOOP [_name_])::
+
+*FOOP* is like a language extension to declare the field names of a
+FOOP class, and thereby gain "get" and "set" functions generated with
+the respective naming formats (:%name obj) and (:!name obj value).
+
+.illustration 
+----
+(context 'MAIN:EX)
+(FOOP here there more)
+(define (EX HERE THERE MORE) (list (context) HERE THERE MORE))
+
+(context MAIN)
+(setf A (EX 1 2 3))
+--> A = (EX 1 2 3)
+(:!there A 4)
+--> A = (EX 1 4 3)
+----
+
+=== mmap.lsp API
+
+This newlisp module implements a small FOOP model based memory mapping
+API that links in the _libc6_ functions _mmap_, _munmap_, _msync_ and
+_lseek_.
+
+(*MMap* _FD_ _LENGTH_ [_OFFSET_ [_PROT_]])::
+
+This function creates a FOOP object that represents the memory mapping
+of the given file descriptor. _FD_ may be the pathname string of a
+file to memory map or an already opened file descriptor. The MMap
+object represents the memory block starting at (:%base) and (%len)
+bytes in length where the file is memory mapped.
++
+.Access example (from test.lsp)
+[caption=""]
+----
+(println (setf X (MMap "mmap.lsp")))
+(println (get-string (:%base X)))
+----
++
+Note that only a plain text file would be accessed with _get-string_.
+A binary file would rather be accessed with _unpack_. The memory
+mapping provides read-only "random access" to the file content.
++
+To set up read-write acces requires an _OFFSET_ and the _PROT_
+argument 0x3, and writing should be accompanied by _MMap:msync_ calls
+so as to synchronize with the backing file.
++
+The FOOP object includes get and set methods for the fields (in
+order): _base_, _len_, _prot_, _flags_, _fd_ and _offset_.
+
+=== test.lsp
+
+This file is a small test of the MMap memory mapping.
+
+== SEE ALSO
+
+*newlisp*
+
+== AUTHOR
+
+Ralph Ronnquist <ralph.ronnquist@gmail.com>