Implemented some port input primitives.

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

diff --git a/src/scheme-primitives.4th b/src/scheme-primitives.4th
index 1ed995b..493f256 100644 (file)
--- a/src/scheme-primitives.4th
+++ b/src/scheme-primitives.4th
@@ -46,6 +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 ==== {{{
@@ -471,6 +475,36 @@
     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 )