string

runtime/gyehoek.c

@@ -2,20 +2,54 @@
 #include <gc.h>
 #include "gyehoek.h"
 
+
+
+const long scm_tc3_cons = 0;
+
+const long scm_tc7_obarray = 0x55;
+const long scm_tc7_symbol = 0x05;
+const long scm_tc7_string = 0x15;
+
+
+
 SCM scm_newline () {
   putc ('\n', stdout);
   return SCM_PACK(NULL);
 }
 
+static void scm_write_string (SCM x) {
+  const size_t len = SCM_CELL_WORD (x, 1);
+  const char *s = (const char *) SCM_UNPACK_POINTER (SCM_CELL_OBJECT (x, 2));
+  /* FIXME: this is a very naïve implementation with no escaping. */
+  printf ("some unrelated unicode lol: %s\n", "왜 하냐??");
+  printf ("\"%.*s\"", (int) len, s);
+}
+
 SCM scm_write (SCM x) {
   if (SCM_IMP (x)) {
     printf ("%ld", SCM_UNPACK (x) >> 2);
+  } else if (SCM_CONSP (x)) {
+    printf ("(");
+    scm_write (scm_car (x));
+    printf (" . ");
+    scm_write (scm_cdr (x));
+    printf (")");
+  } else if (SCM_STRINGP (x)) {
+    scm_write_string (x);
   } else {
     printf ("#<heap object 0x%016lx>", SCM_UNPACK (x));
   }
   return SCM_PACK(NULL);
 }
 
+SCM scm_car (SCM x) {
+  return SCM_CELL_OBJECT (x, 0);
+}
+
+SCM scm_cdr (SCM x) {
+  return SCM_CELL_OBJECT (x, 1);
+}
+
 SCM scm_words (scm_t_bits word_0, uint32_t n_words) {
   scm_t_bits *r = GC_malloc (n_words * sizeof (scm_t_bits));
   r[0] = word_0;
@@ -24,11 +58,18 @@ SCM scm_words (scm_t_bits word_0, uint32_t n_words) {
 
 SCM scm_from_utf8_string (const char *str, size_t len) {
   SCM r = scm_words (scm_tc7_string, 3);
-  const char *s = GC_malloc (len);
   SCM_SET_CELL_WORD (r, 1, len);
-  SCM_SET_CELL_WORD (r, 2, s);
+  SCM_SET_CELL_WORD (r, 2, str);
+  printf ("str: %p\n", str);
   return r;
 }
 
-SCM scm_from_utf8_symbol (const char *s) {
+SCM scm_from_utf8_symbol (const char *s, size_t len) {
+}
+
+SCM scm_cons (SCM car, SCM cdr) {
+  scm_t_bits *r = GC_malloc (2 * sizeof (scm_t_bits));
+  r[0] = SCM_UNPACK (car);
+  r[1] = SCM_UNPACK (cdr);
+  return SCM_PACK (r);
 }