Continuations objs are pairlike for GC marking.

[scheme.forth.jl.git] / src / scheme-primitives.4th

diff --git a/src/scheme-primitives.4th b/src/scheme-primitives.4th
index 8dad18e..c3eeb5d 100644 (file)
--- a/src/scheme-primitives.4th
+++ b/src/scheme-primitives.4th
@@ -20,6 +20,10 @@
     flonum-type istype? -rot 2drop boolean-type
 ; 1 make-fa-primitive flonum?
 
+:noname ( args -- boolobj )
+    ratnum-type istype? -rot 2drop boolean-type
+; 1 make-fa-primitive ratnum?
+
 :noname ( args -- boolobj )
     character-type istype? -rot 2drop boolean-type
 ; 1 make-fa-primitive char?
@@ -42,6 +46,10 @@
     -rot 2drop boolean-type
 ; 1 make-fa-primitive procedure?
 
+:noname ( args -- boolobj )
+    port-type istype? -rot 2drop boolean-type
+; 1 make-fa-primitive port?
+
 \ }}}
 
 \ ==== Type conversions ==== {{{
@@ -149,9 +157,40 @@
     charlist>symbol
 ; make-primitive string->symbol
 
+:noname ( charlist -- string )
+    2dup 1 ensure-arg-count
+
+    car nil? if
+        2drop
+        nil nil cons
+        drop string-type
+        exit
+    then
+    
+    pair-type ensure-arg-type
+
+    duplicate-charlist
+    drop string-type
+; make-primitive list->string
+
+:noname ( string -- charlist )
+    2dup 1 ensure-arg-count
+    car string-type ensure-arg-type
+
+    drop pair-type
+
+    2dup car nil? if
+        2swap 2drop
+    else
+        2drop
+        duplicate-charlist
+    then
+
+; make-primitive string->list
+
 \ }}}
 
-\ ==== Primitivle Arithmetic ==== {{{
+\ ==== Numeric types ==== {{{
 
 \ --- Fixnums ---
 
@@ -219,10 +258,13 @@
     swap negate swap
 ; 1 make-fa-primitive fix:neg
 
-( Find the GCD of n1 and n2 where n2 < n1. )
-: gcd ( n1 n2 -- m )
-    
-;
+:noname ( fixnum -- -fixnum )
+    swap abs swap
+; 1 make-fa-primitive fix:abs
+
+:noname ( fixnum fixnum -- fixnum' )
+    drop swap drop gcd fixnum-type
+; 2 make-fa-primitive fix:gcd
 
 \ --- Flonums ---
 
@@ -238,6 +280,13 @@
     drop swap drop f> boolean-type
 ; 2 make-fa-primitive flo:>
 
+:noname ( flonum flonum -- bool )
+    drop swap drop f<= boolean-type
+; 2 make-fa-primitive flo:<=
+
+:noname ( flonum flonum -- bool )
+    drop swap drop f>= boolean-type
+; 2 make-fa-primitive flo:>=
 
 :noname ( flonum -- bool )
     drop 0.0 = boolean-type
@@ -279,6 +328,10 @@
 ; 1 make-fa-primitive flo:finite?
 
 
+:noname ( flonum -- flonum )
+    swap -1.0 f* swap
+; 1 make-fa-primitive flo:neg
+
 :noname ( flonum -- flonum )
     swap fabs swap
 ; 1 make-fa-primitive flo:abs
@@ -359,6 +412,24 @@
     drop swap drop f/ fatan flonum-type
 ; 2 make-fa-primitive flo:atan2
 
+\ --- Rationals ---
+
+' make-rational 2 make-fa-primitive make-rational
+
+:noname ( ratnum -- fixnum )
+    drop pair-type car
+; 1 make-fa-primitive rat:numerator
+
+:noname ( ratnum -- fixnum )
+    drop pair-type cdr
+; 1 make-fa-primitive rat:denominator
+
+\ --- Conversion ---
+
+:noname ( fixnum -- flonum )
+    drop i->f flonum-type
+; 1 make-fa-primitive fixnum->flonum
+
 \ }}}
 
 \ ==== Pairs and Lists ==== {{{
@@ -403,6 +474,62 @@
 
 \ ==== Input/Output ==== {{{
 
+:noname ( -- port )
+    console-i/o-port obj@
+; 0 make-fa-primitive console-i/o-port
+
+:noname ( -- port )
+    current-input-port obj@
+; 0 make-fa-primitive current-input-port
+
+:noname ( args -- charobj )
+    nil? if
+        2drop current-input-port obj@
+    else
+        car port-type ensure-arg-type
+    then
+
+    read-char
+; make-primitive read-char
+
+:noname ( args -- charobj )
+    nil? if
+        2drop current-input-port obj@
+    else
+        car port-type ensure-arg-type
+    then
+
+    peek-char
+; make-primitive peek-char
+
+:noname ( args -- stringobj )
+    nil? if
+        2drop current-input-port obj@
+    else
+        car port-type ensure-arg-type
+    then
+
+    read-line
+; make-primitive read-line
+
+: charlist>cstr ( charlist addr -- n )
+
+    dup 2swap ( origaddr addr charlist )
+
+    begin 
+        nil? false =
+    while
+        2dup cdr 2swap car 
+        drop ( origaddr addr charlist char )
+        -rot 2swap ( origaddr charlist addr char )
+        over !
+        1+ -rot ( origaddr nextaddr charlist )
+    repeat
+
+    2drop ( origaddr finaladdr ) 
+    swap -
+;
+
 :noname ( args -- finalResult )
     drop pair-type
     pad charlist>cstr
@@ -474,12 +601,24 @@ defer display
 
 :noname ( args -- result )
     2dup car 2swap cdr
-
+ 
     nil? false = if car then ( proc argvals )
-    
-    apply
+     
+    2swap apply
 ; make-primitive apply 
 
+:noname ( proc -- result )
+    make-continuation
+
+    drop if
+        nil cons
+        2swap apply
+    else
+        2swap 2drop
+    then
+
+; 1 make-fa-primitive call-with-current-continuation
+
 \ }}}
 
 \ ==== Miscellaneous  ==== {{{
@@ -491,7 +630,17 @@ defer display
     nil? if
         ." Error."
     else
-        ." Error: " car display
+        ." Error:"
+
+        2dup car space display
+        cdr nil? invert if
+            begin
+                2dup car space print
+                cdr nil?
+            until
+        then
+
+        2drop
     then
 
     reset-term