From: plugd <plugd@thelambdalab.xyz>
Date: Sat, 11 Nov 2023 13:15:57 +0000 (+0100)
Subject: Dictionary lookup working.
X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?p=ez.git;a=commitdiff_plain

Dictionary lookup working.
---

diff --git a/ez.el b/ez.el
index a9d63e3..a6f1f9c 100644
--- a/ez.el
+++ b/ez.el
@@ -93,6 +93,10 @@
 (defun ez-mem-ref-byte (addr)
   (aref ez-memory addr))
 
+(defun ez-mem-ref-bytes (addr count)
+  (mapcar (lambda (offset) (ez-mem-ref-byte (+ addr offset)))
+          (number-sequence 0 (- count 1))))
+
 (defun ez-mem-set-byte (addr val)
   (aset ez-memory addr val))
 
@@ -101,8 +105,12 @@
     (ez-mem-set-byte (+ addr i) (elt vals i))))
 
 (defun ez-mem-ref-word (addr)
-  (+ (* 256 (aref ez-memory addr))
-     (aref ez-memory (+ addr 1))))
+  (logior (lsh (aref ez-memory addr) 8)
+          (aref ez-memory (+ addr 1))))
+
+(defun ez-mem-ref-words (addr count)
+  (mapcar (lambda (offset) (ez-mem-ref-word (+ addr offset)))
+          (number-sequence 0 (- (* 2 count) 1) 2)))
 
 (defun ez-mem-set-word (addr val)
   (let ((byte-high (/ val 256))
@@ -287,6 +295,12 @@
         (logand (lsh word -5) #b11111)
         (logand word #b11111)))
 
+(defun ez-make-zstring-word (zchar-triple)
+  (let ((c1 (elt zchar-triple 0))
+        (c2 (elt zchar-triple 1))
+        (c3 (elz zchar-triple 2)))
+    (logand )))
+
 (defun ez-get-zstring-chars-and-length (base-addr)
   (let ((addr base-addr)
         (chars nil)
@@ -335,7 +349,8 @@
 
 (defun ez-encode (string)
   "Encodes a string as a 2-word 5-padded Z-string.
-Used for matching input with dictionary entries when tokenizing."
+Used for matching input with dictionary entries when tokenizing.
+Returns a length-2 list of words for comparison with a dictionary entry."
   (let ((chars
          (mapcan
           (lambda (c)
@@ -349,9 +364,24 @@ Used for matching input with dictionary entries when tokenizing."
              (t
               (list 5 6 (lsh c -5) (logand c #b11111)))))
           string)))
-    (if (< (length chars) 6)
-        (append chars (make-list (- 6 (length chars)) 5))
-      (take 6 chars))))
+    (let* ((zstring-chars
+            (if (< (length chars) 6)
+                (append chars (make-list (- 6 (length chars)) 5))
+              (take 6 chars)))
+           (c1 (elt zstring-chars 0))
+           (c2 (elt zstring-chars 1))
+           (c3 (elt zstring-chars 2))
+           (c4 (elt zstring-chars 3))
+           (c5 (elt zstring-chars 4))
+           (c6 (elt zstring-chars 5)))
+      (list
+       (logior (lsh c1 10)
+               (lsh c2 5)
+               c3)
+       (logior (lsh 1 15)
+               (lsh c4 10)
+               (lsh c5 5)
+               c6)))))
 
 ;; Dictionary
 
@@ -381,16 +411,16 @@ Used for matching input with dictionary entries when tokenizing."
     (> nseps 0)))
 
 (defun ez-lookup-dictionary (text)
-  (let ((encoded-text (ez-encode text))
-        (nseps (ez-mem-ref-byte ez-dict-base))
-        (bytes-per-entry (ez-mem-ref-byte (+ ez-dict-base 1 nseps)))
-        (nentries (ez-mem-ref-word (+ ez-dict-base 2 nseps)))
-        (entries-seen 0)
-        (this-entry (+ ez-dict-base nseps 4)))
+  (let* ((encoded-text (ez-encode text))
+         (nseps (ez-mem-ref-byte ez-dict-base))
+         (bytes-per-entry (ez-mem-ref-byte (+ ez-dict-base 1 nseps)))
+         (nentries (ez-mem-ref-word (+ ez-dict-base 2 nseps)))
+         (entries-seen 0)
+         (this-entry (+ ez-dict-base nseps 4)))
 
     (while (and (< entries-seen nentries)
                 (not (equal
-                      (ez-mem-ref-bytes this-entry 4)
+                      (ez-mem-ref-words this-entry 2)
                       encoded-text)))
       (setq entries-seen (+ entries-seen 1))
       (setq this-entry (+ this-entry bytes-per-entry)))
@@ -936,7 +966,8 @@ Used for matching input with dictionary entries when tokenizing."
         (ez-mem-set-byte (+ baddr1 1 i) char)))
     (ez-mem-set-byte (+ baddr1 1 (length input-string)) 0)
 
-    (ez--tokenize baddr1 baddr2)))
+    (ez--tokenize baddr1 baddr2))
+  'run)
 
 (defun ez--tokenize (tb-baddr pb-baddr)
 
@@ -948,7 +979,7 @@ Used for matching input with dictionary entries when tokenizing."
     (while unfinished
       (let ((next-char (ez-mem-ref-byte (+ tb-baddr 1 token-end))))
         (cond
-         ((eq char ?\s)
+         ((eq next-char ?\s)
           ;; Add token
           (setq token-end (- token-end 1))
           (let* ((text (ez-mem-ref-string (+ tb-baddr 1 token-start)
@@ -976,7 +1007,6 @@ Used for matching input with dictionary entries when tokenizing."
 (defun ez-load-and-run (filename)
   (ez-load-file filename)
   (ez-parse-header)
-  (ez-parse-dictionary)
   (setq ez-call-stack (list (ez-make-call-stack-frame ez-start-pc)))
 
   (ez-run))