From f60fed7344e26195578de5c9c6c4959a6bcb33c3 Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Wed, 21 Dec 2016 23:47:39 -0500
Subject: [PATCH] Issue #102 - Added a data parameter to Cyc_write()

---
 include/cyclone/runtime.h     |  6 +++---
 runtime.c                     | 28 ++++++++++++++--------------
 scheme/cyclone/primitives.sld |  2 ++
 3 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/include/cyclone/runtime.h b/include/cyclone/runtime.h
index 8641cba3..5c008dd7 100644
--- a/include/cyclone/runtime.h
+++ b/include/cyclone/runtime.h
@@ -149,11 +149,11 @@ void dispatch_display_va(void *data, int argc, object clo, object cont,
 object Cyc_display_va(int argc, object x, ...);
 object Cyc_display_va_list(int argc, object x, va_list ap);
 object Cyc_write_char(void *data, object c, object port);
-object Cyc_write(object, FILE * port);
+object Cyc_write(void *data, object, FILE * port);
 void dispatch_write_va(void *data, int argc, object clo, object cont,
                        object x, ...);
-object Cyc_write_va(int argc, object x, ...);
-object Cyc_write_va_list(int argc, object x, va_list ap);
+object Cyc_write_va(void *data, int argc, object x, ...);
+object Cyc_write_va_list(void *data, int argc, object x, va_list ap);
 
 object Cyc_has_cycle(object lst);
 object Cyc_num_eq(void *, object cont, int argc, object n, ...);
diff --git a/runtime.c b/runtime.c
index 229c2343..f75eb83f 100644
--- a/runtime.c
+++ b/runtime.c
@@ -492,7 +492,7 @@ object Cyc_default_exception_handler(void *data, int argc, closure _,
         Cyc_display(car(err), stderr);
         fprintf(stderr, ": ");
       } else {
-        Cyc_write(car(err), stderr);
+        Cyc_write(data, car(err), stderr);
         fprintf(stderr, " ");
       }
     }
@@ -852,22 +852,22 @@ void dispatch_write_va(void *data, int argc, object clo, object cont,
   object result;
   va_list ap;
   va_start(ap, x);
-  result = Cyc_write_va_list(argc - 1, x, ap);
+  result = Cyc_write_va_list(data, argc - 1, x, ap);
   va_end(ap);
   return_closcall1(data, cont, result);
 }
 
-object Cyc_write_va(int argc, object x, ...)
+object Cyc_write_va(void *data, int argc, object x, ...)
 {
   object result;
   va_list ap;
   va_start(ap, x);
-  result = Cyc_write_va_list(argc, x, ap);
+  result = Cyc_write_va_list(data, argc, x, ap);
   va_end(ap);
   return result;
 }
 
-object Cyc_write_va_list(int argc, object x, va_list ap)
+object Cyc_write_va_list(void *data, int argc, object x, va_list ap)
 {
   FILE *fp = stdout;            // OK since this is the internal version of write
   // Longer-term maybe we get rid of varargs for this one
@@ -886,10 +886,10 @@ object Cyc_write_va_list(int argc, object x, va_list ap)
       exit(1);
     }
   }
-  return Cyc_write(x, fp);
+  return Cyc_write(data, x, fp);
 }
 
-static object _Cyc_write(object x, FILE * port)
+static object _Cyc_write(void *data, object x, FILE * port)
 {
   object tmp = NULL;
   object has_cycle = boolean_f;
@@ -952,14 +952,14 @@ static object _Cyc_write(object x, FILE * port)
       if (i > 0) {
         fprintf(port, " ");
       }
-      _Cyc_write(((vector) x)->elements[i], port);
+      _Cyc_write(data, ((vector) x)->elements[i], port);
     }
     fprintf(port, ")");
     break;
   case pair_tag:
     has_cycle = Cyc_has_cycle(x);
     fprintf(port, "(");
-    _Cyc_write(car(x), port);
+    _Cyc_write(data, car(x), port);
 
     // Experimenting with displaying lambda defs in REPL
     // not good enough but this is a start. would probably need
@@ -967,7 +967,7 @@ static object _Cyc_write(object x, FILE * port)
     if (Cyc_is_symbol(car(x)) == boolean_t &&
         strncmp(((symbol) car(x))->desc, "procedure", 10) == 0) {
       fprintf(port, " ");
-      _Cyc_write(cadr(x), port);
+      _Cyc_write(data, cadr(x), port);
       fprintf(port, " ...)");   /* skip body and env for now */
       break;
     }
@@ -978,13 +978,13 @@ static object _Cyc_write(object x, FILE * port)
           break;                /* arbitrary number, for now */
       }
       fprintf(port, " ");
-      _Cyc_write(car(tmp), port);
+      _Cyc_write(data, car(tmp), port);
     }
     if (has_cycle == boolean_t) {
       fprintf(port, " ...");
     } else if (tmp) {
       fprintf(port, " . ");
-      _Cyc_write(tmp, port);
+      _Cyc_write(data, tmp, port);
     }
     fprintf(port, ")");
     break;
@@ -994,9 +994,9 @@ static object _Cyc_write(object x, FILE * port)
   return quote_void;
 }
 
-object Cyc_write(object x, FILE * port)
+object Cyc_write(void *data, object x, FILE * port)
 {
-  object y = _Cyc_write(x, port);
+  object y = _Cyc_write(data, x, port);
   //fprintf(port, "\n");
   return y;
 }
diff --git a/scheme/cyclone/primitives.sld b/scheme/cyclone/primitives.sld
index 72e8a057..9303089c 100644
--- a/scheme/cyclone/primitives.sld
+++ b/scheme/cyclone/primitives.sld
@@ -607,6 +607,8 @@
         close-input-port
         close-output-port
         Cyc-flush-output-port
+        ; TODO: Cyc-display
+        Cyc-write
         file-exists?
         delete-file
         read-char