* Writing strings to fasl files now uses 4-byte words for each

character.

bin/ikarus-data.h

@@ -98,7 +98,11 @@
 #define off_string_data (disp_string_data - string_tag)
 
 #define string_data(x)  ((char*)((x) + off_string_data))
-
+#define string_set(x,i,c) \
+  ((((unsigned char*)(x)) + off_string_data + (int)(i))[0] = \
+   (((int)(c)) >> IK_CHAR_SHIFT))
+#define integer_to_char(x) ((ikp)((((int)(x)) << IK_CHAR_SHIFT) + IK_CHAR_TAG))
+#define string_char_size 1
 
 #define vector_tag 5
 #define disp_vector_length 0

bin/ikarus-fasl.c

@@ -270,8 +270,8 @@ static ikp do_read(ikpcb* pcb, fasl_port* p){
     }
     return sym;
   }
-  else if(c == 'S'){
+  else if(c == 's'){
-    /* string */
+    /* ascii string */
     int len;
     fasl_read_buf(p, &len, sizeof(int));
     int size = align(len + disp_string_data + 1);
@@ -284,6 +284,26 @@ static ikp do_read(ikpcb* pcb, fasl_port* p){
     }
     return str;
   }
+  else if(c == 'S'){
+    /* string */
+    int len;
+    fasl_read_buf(p, &len, sizeof(int));
+    int size = align(len*string_char_size + disp_string_data + 1);
+    ikp str = ik_alloc(pcb, size) + string_tag;
+    ref(str, off_string_length) = fix(len);
+    int i;
+    for(i=0; i<len; i++){
+      int c;
+      fasl_read_buf(p, &c, sizeof(int));
+      string_set(str, i, integer_to_char(c));
+    }
+    str[off_string_data+len*string_char_size] = 0;
+    if(put_mark_index){
+      p->marks[put_mark_index] = str;
+    }
+    return str;
+  }
+
   else if(c == 'V'){
     int len;
     fasl_read_buf(p, &len, sizeof(int));

src/ikarus.fasl.ss

@@ -18,7 +18,8 @@
 ;;;   "P" + object1 + object2 : a pair
 ;;;   "V" + 4-bytes(n) + object ... : a vector of length n followed by n objects
 ;;;   "v" + 4-byte(n) + octet ... : a bytevector of length n followed by n octets
-;;;   "S" + 4-bytes(n) + char ... : a string
+;;;   "s" + 4-bytes(n) + octet ... : an ascii string
+;;;   "S" + 4-bytes(n) + int ... : a unicode string
 ;;;   "M" + symbol-name : a symbol
 ;;;   "G" + pretty-name + unique-name : a gensym
 ;;;   "R" + rtd-name + rtd-symbol + field-count + field-names

src/ikarus.fasl.write.ss

@@ -63,7 +63,7 @@
            (cond
              [(fx= i n) m]
              [else
-              (write-char (string-ref x i) p)
+              (write-int (char->integer (string-ref x i)) p)
               (f x (fxadd1 i) n)]))]
         [(gensym? x)
          (write-char #\G p)