X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=scheme-primitives.4th;h=9afc2c2c1e6f75c12c625ede194aeb6ec7179523;hb=0bef27a3e92222d3024396ee4f37b243d4f8ef18;hp=3de4d3770f7ee823f3f52e72747ce3a098f58f82;hpb=dc6e0cea1e1e982da8029c94d78ee66ab7e8fd82;p=scheme.forth.jl.git

diff --git a/scheme-primitives.4th b/scheme-primitives.4th
index 3de4d37..9afc2c2 100644
--- a/scheme-primitives.4th
+++ b/scheme-primitives.4th
@@ -48,7 +48,107 @@
     car primitive-type istype? -rot 2drop boolean-type
 ; make-primitive procedure?
 
-( = Arithmeic = )
+( = Type conversions = )
+
+:noname ( args -- fixnum )
+    2dup 1 ensure-arg-count
+    car character-type ensure-arg-type
+
+    drop fixnum-type
+; make-primitive char->integer
+
+:noname ( args -- char )
+    2dup 1 ensure-arg-count
+    car fixnum-type ensure-arg-type
+
+    drop character-type
+; make-primitive integer->char
+
+: num-to-charlist ( num -- charlist )
+    ?dup 0= if
+        [char] 0 character-type nil cons
+        exit
+    then
+
+    nil rot
+
+    begin
+        ?dup 0>
+    while
+        dup 10 mod swap 10 / swap
+        2swap rot
+        [char] 0 + character-type 2swap
+        cons
+        rot
+    repeat
+;
+
+:noname ( args -- string )
+    2dup 1 ensure-arg-count
+    car fixnum-type ensure-arg-type
+
+    drop
+
+    dup 0< swap abs ( bool num )
+    num-to-charlist
+    rot if
+        [char] - character-type 2swap cons
+    then
+
+    drop string-type
+; make-primitive number->string
+
+:noname ( args -- symbol )
+    2dup 1 ensure-arg-count
+    car string-type ensure-arg-type
+
+    drop pair-type
+
+    2dup car [char] - character-type objeq? if
+        cdr
+        true -rot
+    else
+        2dup car [char] + character-type objeq? if
+            cdr
+        then
+        false -rot
+    then
+
+    0 -rot
+    begin
+        2dup nil objeq? false =
+    while
+        2dup car drop [char] 0 - -rot
+        2swap swap 10 * + -rot
+        cdr
+    repeat
+
+    2drop
+
+    swap if -1 * then
+
+    fixnum-type
+; make-primitive string->number
+
+:noname ( args -- string )
+    2dup 1 ensure-arg-count
+    car symbol-type ensure-arg-type
+
+    drop pair-type
+    duplicate-charlist
+    drop string-type
+; make-primitive symbol->string
+
+:noname ( args -- symbol )
+    2dup 1 ensure-arg-count
+    car string-type ensure-arg-type
+
+    drop pair-type
+    duplicate-charlist
+    charlist>symbol
+; make-primitive string->symbol
+
+( = Arithmetic = )
 
 : add-prim ( args -- fixnum )
     2dup nil objeq? if
@@ -68,8 +168,14 @@
         0 fixnum-type
     else
         2dup car drop
-        -rot cdr add-prim drop
-        - fixnum-type
+        -rot cdr
+        2dup nil objeq? if
+            2drop negate
+        else
+            add-prim drop
+            -
+        then
+        fixnum-type
     then
 ; make-primitive -
 
@@ -84,3 +190,148 @@
     then
 ; make-primitive *
 
+:noname ( args -- fixnum )
+    2dup 2 ensure-arg-count
+
+    2dup car fixnum-type ensure-arg-type
+    2swap cdr car fixnum-type ensure-arg-type
+
+    drop swap drop
+
+    / fixnum-type
+; make-primitive quotient
+
+:noname ( args -- fixnum )
+    2dup 2 ensure-arg-count
+
+    2dup car fixnum-type ensure-arg-type
+    2swap cdr car fixnum-type ensure-arg-type
+
+    drop swap drop
+
+    mod fixnum-type
+; make-primitive remainder
+
+variable relcfa
+
+: test-relation ( args -- bool )
+
+    2dup nil objeq? if
+        2drop
+        true boolean-type exit
+    then
+
+    ( args )
+
+    2dup car fixnum-type ensure-arg-type ( args arg0 )
+    2swap cdr ( arg0 args' )
+
+    2dup nil objeq? if
+        2drop 2drop
+        true boolean-type exit
+    then
+
+    ( arg0 args' )
+
+    begin
+        2dup nil objeq? false =
+    while
+        2dup car fixnum-type ensure-arg-type ( arg0 args' arg1 )
+        2rot 2swap 2dup 2rot 2swap ( args' arg1 arg1 arg0 )
+        relcfa @ execute false = if
+            2drop 2drop
+            false boolean-type exit
+        then
+
+        2swap cdr ( arg0 args'' )
+    repeat
+
+    2drop 2drop
+    true boolean-type
+; 
+
+: fixnum-lt ( obj1 obj2 -- bool )
+    drop swap drop <
+;
+
+:noname
+    ['] fixnum-lt relcfa !
+    test-relation
+; make-primitive <
+
+: fixnum-gt ( obj1 obj2 -- bool )
+    drop swap drop >
+;
+
+:noname
+    ['] fixnum-gt relcfa !
+    test-relation
+; make-primitive >
+
+: fixnum-eq ( obj1 obj2 -- bool )
+    drop swap drop =
+;
+
+:noname
+    ['] fixnum-eq relcfa !
+    test-relation
+; make-primitive =
+
+hide relcfa
+
+( = Pairs and Lists = )
+
+:noname ( args -- pair )
+    2dup 2 ensure-arg-count
+
+    2dup car 2swap cdr car
+    cons
+; make-primitive cons
+
+:noname ( args -- list )
+    \ args is already a list!
+; make-primitive list
+
+:noname ( args -- pair )
+    2dup 1 ensure-arg-count
+    car pair-type ensure-arg-type
+
+    car
+; make-primitive car
+
+:noname ( args -- pair )
+    2dup 1 ensure-arg-count
+    car pair-type ensure-arg-type
+
+    cdr
+; make-primitive cdr
+
+:noname ( args -- pair )
+    2dup 2 ensure-arg-count
+    2dup cdr car
+    2swap car pair-type ensure-arg-type
+
+    set-car!
+
+    ok-symbol
+; make-primitive set-car!
+
+:noname ( args -- pair )
+    2dup 2 ensure-arg-count
+    2dup cdr car
+    2swap car pair-type ensure-arg-type
+
+    set-cdr!
+
+    ok-symbol
+; make-primitive set-cdr!
+
+( = Polymorphic equality testing = )
+
+:noname ( args -- bool )
+    2dup 2 ensure-arg-count
+    2dup cdr car
+    2swap car
+
+    objeq? boolean-type
+; make-primitive eq?