save-exe: new function.

* lisplib.c (save_exe_instantiate, save_exe_set_entries): New
static functions.
(lisplib_init): Register auto-load of save-exe module, keyed
to save-exe symbol.

* share/txr/stdlib/save-exe.tl: New file.

* txr.1: Removing txr-embedded-arg.txr documentation and
documenting save-exe in its place.

* txr-embedded-arg.txr: File removed.

1 files changed, 38 insertions, 0 deletions

diff --git a/share/txr/stdlib/save-exe.tl b/share/txr/stdlib/save-exe.tl
new file mode 100644
index 00000000..dada28a3
--- /dev/null
+++ b/share/txr/stdlib/save-exe.tl
@@ -0,0 +1,38 @@
+;; Copyright 2019
+;; Kaz Kylheku <kaz@kylheku.com>
+;; Vancouver, Canada
+;; All rights reserved.
+;;
+;; Redistribution and use in source and binary forms, with or without
+;; modification, are permitted provided that the following conditions are met:
+;;
+;; 1. Redistributions of source code must retain the above copyright notice, this
+;;    list of conditions and the following disclaimer.
+;;
+;; 2. Redistributions in binary form must reproduce the above copyright notice,
+;;    this list of conditions and the following disclaimer in the documentation
+;;    and/or other materials provided with the distribution.
+;;
+;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+(defun save-exe (path string)
+  (let* ((fbuf (file-get-buf txr-exe-path))
+         (bs (make-buf-stream fbuf))
+         (pre (progn
+                (stream-set-prop bs :byte-oriented t)
+                (scan-until-match #/@\(txr\)/ bs)))
+         (sbuf (ffi-put string (ffi (zarray 128 char)))))
+    (unless pre
+      (throwf 'error "~s: ~a isn't a TXR executable" 'save-txr-exe path))
+    (put-buf sbuf 0 bs)
+    (file-put-buf path fbuf)
+    (chmod path #o766)))