initial commit

12 files changed, 1235 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0a123e7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,65 @@
+*.eps
+*.go
+*.log
+*.pdf
+*.png
+*.tar.xz
+*.tar.gz
+*.tmp
+*~
+.#*
+\#*\#
+,*
+/ABOUT-NLS
+/INSTALL
+/aclocal.m4
+/autom4te.cache
+/build-aux/ar-lib
+/build-aux/compile
+/build-aux/config.guess
+/build-aux/config.rpath
+/build-aux/config.sub
+/build-aux/depcomp
+/build-aux/install-sh
+/build-aux/mdate-sh
+/build-aux/missing
+/build-aux/test-driver
+/build-aux/texinfo.tex
+/config.status
+/configure
+/doc/*.1
+/doc/.dirstamp
+/doc/contributing.*.texi
+/doc/*.aux
+/doc/*.cp
+/doc/*.cps
+/doc/*.fn
+/doc/*.fns
+/doc/*.html
+/doc/*.info
+/doc/*.info-[0-9]
+/doc/*.ky
+/doc/*.pg
+/doc/*.toc
+/doc/*.t2p
+/doc/*.tp
+/doc/*.vr
+/doc/*.vrs
+/doc/stamp-vti
+/doc/version.texi
+/doc/version-*.texi
+/m4/*
+/pre-inst-env
+/test-env
+/test-tmp
+/tests/*.trs
+GPATH
+GRTAGS
+GTAGS
+Makefile
+Makefile.in
+config.cache
+stamp-h[0-9]
+tmp
+/.version
+/doc/stamp-[0-9]
diff --git a/.reuse/dep5 b/.reuse/dep5
new file mode 100644
index 0000000..3d0e7e0
--- /dev/null
+++ b/.reuse/dep5
@@ -0,0 +1,10 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: guile-lmdb
+Upstream-Contact: pukkamustard <pukkamustard@posteo.net>
+Source: https://inqlab.net/git/guile-lmdb.git
+
+# Sample paragraph, commented out:
+#
+# Files: src/*
+# Copyright: $YEAR $NAME <$CONTACT>
+# License: ...
diff --git a/COPYING b/COPYING
new file mode 120000
index 0000000..c5bedec
--- /dev/null
+++ b/COPYING
@@ -0,0 +1 @@
+LICENSES/GPL-3.0-or-later.txt
\ No newline at end of file
diff --git a/HACKING b/HACKING
new file mode 100644
index 0000000..630681d
--- /dev/null
+++ b/HACKING
@@ -0,0 +1,47 @@
+-*- mode: org; coding: utf-8; -*-
+
+#+TITLE: Hacking lmdb
+
+* Contributing
+
+By far the easiest way to hack on lmdb is to develop using Guix:
+
+#+BEGIN_SRC bash
+  # Obtain the source code
+  cd /path/to/source-code
+  guix environment -l guix.scm
+  # In the new shell, run:
+  hall dist --execute && autoreconf -vif && ./configure && make check
+#+END_SRC
+
+You can now hack this project's files to your heart's content, whilst
+testing them from your `guix environment' shell.
+
+To try out any scripts in the project you can now use
+
+#+BEGIN_SRC bash
+  ./pre-inst-env scripts/${script-name}
+#+END_SRC
+
+If you'd like to tidy the project again, but retain the ability to test the
+project from the commandline, simply run:
+
+#+BEGIN_SRC bash
+  ./hall clean --skip "scripts/${script-name},pre-inst-env" --execute
+#+END_SRC
+
+** Manual Installation
+
+If you do not yet use  Guix, you will have to install this project's
+dependencies manually:
+  - autoconf
+  - automake
+  - pkg-config
+  - texinfo
+  - guile-hall
+
+Once those dependencies are installed you can run:
+
+#+BEGIN_SRC bash
+  hall dist -x && autoreconf -vif && ./configure && make check
+#+END_SRC
diff --git a/LICENSES/CC0-1.0.txt b/LICENSES/CC0-1.0.txt
new file mode 100644
index 0000000..0e259d4
--- /dev/null
+++ b/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
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+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
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+
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diff --git a/LICENSES/GPL-3.0-or-later.txt b/LICENSES/GPL-3.0-or-later.txt
new file mode 100644
index 0000000..5990771
--- /dev/null
+++ b/LICENSES/GPL-3.0-or-later.txt
@@ -0,0 +1,604 @@
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
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+document, but changing it is not allowed.
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+12. No Surrender of Others' Freedom.
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+14. Revised Versions of this License.
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+in spirit to the present version, but may differ in detail to address new
+problems or concerns.
+
+Each version is given a distinguishing version number. If the Program specifies
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+If the Program specifies that a proxy can decide which future versions of
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+Later license versions may give you additional or different permissions. However,
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+15. Disclaimer of Warranty.
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+17. Interpretation of Sections 15 and 16.
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+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
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+use to the public, the best way to achieve this is to make it free software
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+the terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
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+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
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+this program.  If not, see <http://www.gnu.org/licenses/>.
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+Also add information on how to contact you by electronic and paper mail.
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+This is free software, and you are welcome to redistribute it under certain
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+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands might
+be different; for a GUI interface, you would use an “about box”.
+
+You should also get your employer (if you work as a programmer) or school,
+if any, to sign a “copyright disclaimer” for the program, if necessary. For
+more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General Public
+License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/README b/README
new file mode 120000
index 0000000..314e17d
--- /dev/null
+++ b/README
@@ -0,0 +1 @@
+README.org
\ No newline at end of file
diff --git a/README.org b/README.org
new file mode 100644
index 0000000..b02eef7
--- /dev/null
+++ b/README.org
@@ -0,0 +1,36 @@
+-*- mode: org; coding: utf-8; -*-
+
+#+TITLE: guile-lmdb
+
+Guile bindings to the Lightning Memory-Mapped Database (LMDB).
+
+* Example
+
+#+BEGIN_SRC scheme
+
+(define env (mdb-env-create))
+
+(mdb-env? env)
+
+(mdb-env-open env "./testdb")
+
+(define txn (mdb-txn-begin env))
+
+(define dbi (mdb-dbi-open txn))
+
+(mdb-put txn dbi
+         (make-mdb-val (string->utf8 "Hello"))
+         (make-mdb-val (string->utf8 "LMDB!")))
+
+(mdb-txn-commit txn)
+
+(define txn (mdb-txn-begin env))
+
+(utf8->string
+ (mdb-val-data
+  (mdb-get txn dbi (make-mdb-val (string->utf8 "Hello")))))
+
+(mdb-txn-abort txn)
+
+(mdb-env-close env)
+#+END_SRc
diff --git a/doc/lmdb.texi b/doc/lmdb.texi
new file mode 100644
index 0000000..3aaee91
--- /dev/null
+++ b/doc/lmdb.texi
@@ -0,0 +1,61 @@
+
+\input texinfo
+@c -*-texinfo-*-
+
+@c %**start of header
+@setfilename guile-lmdb.info
+@documentencoding UTF-8
+@settitle guile-lmdb Reference Manual
+@c %**end of header
+
+@include version.texi
+
+@copying
+Copyright @copyright{} 2021 pukkamustard
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.  A
+copy of the license is included in the section entitled ``GNU Free
+Documentation License''.
+@end copying
+
+@dircategory The Algorithmic Language Scheme
+@direntry
+* guile-lmdb: (guile-lmdb).
+@end direntry
+
+@titlepage
+@title The guile-lmdb Manual
+@author pukkamustard
+
+@page
+@vskip 0pt plus 1filll
+Edition @value{EDITION} @*
+@value{UPDATED} @*
+
+@insertcopying
+@end titlepage
+
+@contents
+
+@c *********************************************************************
+@node Top
+@top guile-lmdb
+
+This document describes guile-lmdb version @value{VERSION}.
+
+@menu
+* Introduction::                Why Guile Lmdb?
+@end menu
+
+@c *********************************************************************
+@node Introduction
+@chapter Introduction
+
+INTRODUCTION HERE
+
+This documentation is a stub.
+
+@bye
diff --git a/guix.scm b/guix.scm
new file mode 100644
index 0000000..98622b3
--- /dev/null
+++ b/guix.scm
@@ -0,0 +1,32 @@
+(use-modules
+ (guix packages)
+ ((guix licenses) #:prefix license:)
+ (guix download)
+ (guix build-system gnu)
+ (gnu packages databases)
+ (gnu packages autotools)
+ (gnu packages autotools)
+ (gnu packages guile)
+ (gnu packages guile-xyz)
+ (gnu packages pkg-config)
+ (gnu packages texinfo))
+
+(package
+ (name "guile-lmdb")
+ (version "0.1.0")
+ (source "./guile-lmdb-0.1.0.tar.gz")
+ (build-system gnu-build-system)
+ (arguments `())
+ (native-inputs
+  `(("autoconf" ,autoconf)
+    ("automake" ,automake)
+    ("pkg-config" ,pkg-config)
+    ("texinfo" ,texinfo)))
+ (inputs `(("guile" ,guile-3.0)
+           ("lmdb" ,lmdb)))
+ (propagated-inputs `())
+ (synopsis "")
+ (description "")
+ (home-page
+  "https://inqlab.net/git/guile-lmdb.git")
+ (license license:gpl3+))
diff --git a/hall.scm b/hall.scm
new file mode 100644
index 0000000..30cb0cb
--- /dev/null
+++ b/hall.scm
@@ -0,0 +1,25 @@
+(hall-description
+ (name "lmdb")
+ (prefix "guile")
+ (version "0.1.0")
+ (author "pukkamustard")
+ (copyright (2021))
+ (synopsis "")
+ (description "")
+ (home-page "https://inqlab.net/git/guile-lmdb.git")
+ (license gpl3+)
+ (dependencies `())
+ (files (libraries
+         ((scheme-file "lmdb") (directory "lmdb" ())))
+        (tests ((directory "tests" ())))
+        (programs ((directory "scripts" ())))
+        (documentation
+         ((org-file "README")
+          (symlink "README" "README.org")
+          (text-file "HACKING")
+          (text-file "COPYING")
+          (directory "doc" ((texi-file "lmdb")))))
+        (infrastructure
+         ((scheme-file "guix")
+          (text-file ".gitignore")
+          (scheme-file "hall")))))
diff --git a/lmdb.scm b/lmdb.scm
new file mode 100644
index 0000000..76eafc6
--- /dev/null
+++ b/lmdb.scm
@@ -0,0 +1,232 @@
+(define-module (lmdb)
+  #:use-module (system foreign)
+
+  #:use-module (ice-9 format)
+
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-35)
+
+  #:use-module (rnrs bytevectors))
+
+;; dynamic binding to liblmdb
+
+(define liblmdb (dynamic-link
+                 "/gnu/store/4xi21x5i0vch4wmylg2vbzjl7rqija5f-lmdb-0.9.27/lib/liblmdb"))
+
+
+;; error handling
+
+(define-condition-type &lmdb-error
+  &error
+  lmdb-error?
+  (function-name lmdb-error-function-name)
+  (code lmdb-error-code)
+  (description lmdb-error-description))
+
+(define (mdb-strerror err)
+  "Return a string describing a given error code."
+  (let ((proc (pointer->procedure '*
+                                  (dynamic-func "mdb_strerror" liblmdb)
+                                  (list int))))
+    (pointer->string (proc err))))
+
+;; helper for calling lmdb functions that checks return value
+
+(define (liblmdb-func name arg-types)
+  (let ((proc (pointer->procedure int
+                                  (dynamic-func name liblmdb)
+                                  arg-types)))
+    (lambda* (#:rest args)
+      (let ((return-value (apply proc args)))
+        (unless (= 0 return-value)
+          (raise
+           (condition (&lmdb-error
+                       (function-name name)
+                       (code return-value)
+                       (description (mdb-strerror return-value))))))
+        return-value))))
+
+(define (liblmdb-void-func name arg-types)
+  (pointer->procedure void
+                      (dynamic-func name liblmdb)
+                      arg-types))
+
+;; MDB_env
+
+(define-wrapped-pointer-type <mdb-env>
+  mdb-env?
+  wrap-mdb-env unwrap-mdb-env
+  (lambda (mdb-env port)
+    (format port "#<mdb-env ~x>"
+            (pointer-address (unwrap-mdb-env mdb-env)))))
+
+(define (mdb-env-create)
+  "Create an LMDB environment handle"
+  (let ((proc (liblmdb-func "mdb_env_create" (list '*)))
+        (mdb-env-ptr (bytevector->pointer
+                      (make-bytevector (sizeof '*) 0))))
+    ;; call mdb_env_create
+    (proc mdb-env-ptr)
+    ;; wrap returned pointer as <mdb-env>
+    (wrap-mdb-env (dereference-pointer mdb-env-ptr))))
+
+(define (mdb-env-open mdb-env path)
+  "Open an environment handle"
+  (let ((proc (liblmdb-func "mdb_env_open"
+                            (list
+                             ;; MDB_env* env
+                             '*
+                             ;; char* path
+                             '*
+                             ;; unsigned int flags
+                             unsigned-int
+                             ;; mdb_mode_t mode (int)
+                             int))))
+    (proc (unwrap-mdb-env mdb-env) (string->pointer path) 0 #o644)))
+
+(define (mdb-env-close mdb-env)
+  "Close the environment and release the memory map"
+  (let ((proc (liblmdb-void-func "mdb_env_close" (list '*))))
+    (proc (unwrap-mdb-env mdb-env))))
+
+;; MDB_txn
+
+(define-wrapped-pointer-type <mdb-txn>
+  mdb-txn?
+  wrap-mdb-txn unwrap-mdb-txn
+  (lambda (mdb-txn port)
+    (format port "#<mdb-txn ~x>"
+            (pointer-address (unwrap-mdb-txn mdb-txn)))))
+
+(define (mdb-txn-begin env)
+  "Create a transaction for use with the environment"
+  (let ((proc (liblmdb-func "mdb_txn_begin"
+                            (list
+                             ;; MDB_env* env
+                             '*
+                             ;; MDB_txn* parent
+                             '*
+                             ;; unsigned int flags
+                             unsigned-int
+                             ;; MDB_txn** txn
+                             '*)))
+
+        ;; allocate a new pointer for returned txn
+        (txn-ptr (bytevector->pointer
+                  (make-bytevector (sizeof '*)))))
+
+    ;; call mdb_txn_begin
+    (proc (unwrap-mdb-env env)
+          ;; TODO allow specifying parent txn
+          (make-pointer 0)
+          0
+          txn-ptr)
+
+    ;; wrap pointer as <mdb-txn>
+    (wrap-mdb-txn (dereference-pointer txn-ptr))))
+
+
+(define (mdb-txn-abort txn)
+  "Abandon all the operations of the transaction instead of saving them"
+  (let ((proc (liblmdb-void-func "mdb_txn_abort" (list '*))))
+    (proc (unwrap-mdb-txn txn))))
+
+(define (mdb-txn-commit txn)
+  "Commit all the operations of a transaction into the database"
+  (let ((proc (liblmdb-func "mdb_txn_commit" (list '*))))
+    (proc (unwrap-mdb-txn txn))))
+
+;; MDB_dbi
+
+(define-wrapped-pointer-type <mdb-dbi>
+  mdb-dbi?
+  wrap-mdb-dbi unwrap-mdb-dbi
+  (lambda (mdb-dbi port)
+    (format port "#<mdb-dbi ~x>"
+            (pointer-address (unwrap-mdb-dbi mdb-dbi)))))
+
+
+(define (mdb-dbi-open txn)
+  (let ((proc (liblmdb-func "mdb_dbi_open"
+                            (list
+                             ;; MDB_txn* txn
+                             '*
+                             ;; const char* name
+                             '*
+                             ;; unsigned int flags
+                             unsigned-int
+                             ;; MDB_dbi* dbi
+                             '*)))
+        (dbi-ptr (bytevector->pointer
+                  (make-bytevector (sizeof '*)))))
+    (proc (unwrap-mdb-txn txn)
+          ;; null pointer TODO allow specifying name
+          (make-pointer 0)
+          0
+          dbi-ptr)
+    ;; wrap pointer as <mdb-dbi>
+    (wrap-mdb-dbi (dereference-pointer dbi-ptr))))
+
+
+;; MDB_val
+
+(define-wrapped-pointer-type <mdb-val>
+  mdb-val?
+  wrap-mdb-val unwrap-mdb-val
+  (lambda (mdb-val port)
+    (format port "#<mdb-val ~x>"
+            (pointer-address (unwrap-mdb-val mdb-val)))))
+
+(define (make-mdb-val value)
+  (wrap-mdb-val (make-c-struct (list size_t '*)
+                               (list (bytevector-length value)
+                                     (bytevector->pointer value)))))
+
+(define (mdb-val-data val)
+  (let ((size-data-ptr (parse-c-struct (unwrap-mdb-val val) (list size_t '*))))
+    (pointer->bytevector (cadr size-data-ptr)
+                         (car size-data-ptr))))
+
+;; put and get
+
+(define (mdb-put txn dbi key data)
+  "Store items into a database."
+  (let ((proc (liblmdb-func "mdb_put"
+                            (list
+                             ;; MDB_txn* txn
+                             '*
+                             ;; MDB_dbi* dbi
+                             '*
+                             ;; MDB_val* key
+                             '*
+                             ;; MDB_val* data
+                             '*
+                             ;; unsigned int flags
+                             unsigned-int))))
+    (proc (unwrap-mdb-txn txn)
+          (unwrap-mdb-dbi dbi)
+          (unwrap-mdb-val key)
+          (unwrap-mdb-val data)
+          0)))
+
+(define (mdb-get txn dbi key)
+  "Store items into a database."
+  (let ((proc (liblmdb-func "mdb_get"
+                            (list
+                             ;; MDB_txn* txn
+                             '*
+                             ;; MDB_dbi* dbi
+                             '*
+                             ;; MDB_val* key
+                             '*
+                             ;; MDB_val* data
+                             '*)))
+        (data-ptr (bytevector->pointer
+                   (make-bytevector (sizeof '*)))))
+    ;; call mdb_get
+    (proc (unwrap-mdb-txn txn)
+          (unwrap-mdb-dbi dbi)
+          (unwrap-mdb-val key)
+          data-ptr)
+    ;; wrap data as <mdb-val>
+    (wrap-mdb-val data-ptr)))