More work on textprinter.

stream/upb_textprinter.c

@@ -13,32 +13,31 @@
 
 struct _upb_textprinter {
   upb_bytesink *bytesink;
-  upb_string *str;
   int indent_depth;
   bool single_line;
   upb_fielddef *f;
 };
 
-static void upb_textprinter_endfield(upb_textprinter *p)
+static void upb_textprinter_indent(upb_textprinter *p)
 {
+  if(!p->single_line)
+    for(int i = 0; i < p->indent_depth; i++)
+      upb_bytesink_put(p->bytesink, UPB_STRLIT("  "));
+}
+
+static void upb_textprinter_endfield(upb_textprinter *p) {
   if(p->single_line)
     upb_bytesink_put(p->bytesink, UPB_STRLIT(" "));
   else
     upb_bytesink_put(p->bytesink, UPB_STRLIT("\n"));
 }
 
-static bool upb_textprinter_putval(upb_textprinter *p, upb_value val) {
-  upb_bytesink_put(p->bytesink, UPB_STRLIT(": "));
-  upb_enumdef *enum_def;
-  upb_string *enum_label;
-  if(p->f->type == UPB_TYPE(ENUM) &&
-     (enum_def = upb_downcast_enumdef(p->f->def)) != NULL &&
-     (enum_label = upb_enumdef_iton(enum_def, val.int32)) != NULL) {
-    // This is an enum value for which we found a corresponding string.
-    upb_bytesink_put(p->bytesink, enum_label);
-  } else {
-    p->str = upb_string_tryrecycle(p->str);
-#define CASE(fmtstr, member) upb_string_printf(p->str, fmtstr, val.member); break;
+static upb_flow_t upb_textprinter_value(void *_p, upb_fielddef *f,
+                                        upb_value val) {
+  upb_textprinter *p = _p;
+  upb_textprinter_indent(p);
+  upb_bytesink_printf(p->bytesink, UPB_STRFMT ": ", UPB_STRARG(f->name));
+#define CASE(fmtstr, member) upb_bytesink_printf(p->bytesink, fmtstr, val.member); break;
   switch(p->f->type) {
     case UPB_TYPE(DOUBLE):
       CASE("%0.f", _double);
@@ -57,75 +56,61 @@ static bool upb_textprinter_putval(upb_textprinter *p, upb_value val) {
       CASE("%" PRId32, int32)
     case UPB_TYPE(UINT32):
     case UPB_TYPE(FIXED32):
-      case UPB_TYPE(ENUM):
       CASE("%" PRIu32, uint32);
+    case UPB_TYPE(ENUM): {
+      upb_enumdef *enum_def;
+      upb_string *enum_label;
+       (enum_def = upb_downcast_enumdef(p->f->def)) != NULL &&
+       (enum_label = upb_enumdef_iton(enum_def, val.int32)) != NULL) {
+      // This is an enum value for which we found a corresponding string.
+      upb_bytesink_put(p->bytesink, enum_label);
+      CASE("%" PRIu32, uint32);
+    }
     case UPB_TYPE(BOOL):
       CASE("%hhu", _bool);
-    }
-    upb_bytesink_put(p->bytesink, p->str);
-  }
-  upb_textprinter_endfield(p);
-  return upb_ok(upb_bytesink_status(p->bytesink));
-}
-
-static bool upb_textprinter_putstr(upb_textprinter *p, upb_string *str) {
+    case UPB_TYPE(STRING):
+    case UPB_TYPE(BYTES):
       upb_bytesink_put(p->bytesink, UPB_STRLIT(": \""));
-  // TODO: escaping.
       upb_bytesink_put(p->bytesink, str);
       upb_bytesink_put(p->bytesink, UPB_STRLIT("\""));
-  upb_textprinter_endfield(p);
-  return upb_ok(upb_bytesink_status(p->bytesink));
-}
-
-static void upb_textprinter_indent(upb_textprinter *p)
-{
-  if(!p->single_line)
-    for(int i = 0; i < p->indent_depth; i++)
-      upb_bytesink_put(p->bytesink, UPB_STRLIT("  "));
+      break;
   }
-
-static bool upb_textprinter_putdef(upb_textprinter *p, upb_fielddef *f)
-{
-  upb_textprinter_indent(p);
-  upb_bytesink_put(p->bytesink, f->name);
-  p->f = f;
-  return upb_ok(upb_bytesink_status(p->bytesink));
+  upb_textprinter_endfield(p);
+  return UPB_CONTINUE;
 }
 
-static bool upb_textprinter_startmsg(upb_textprinter *p)
-{
+static upb_flow_t upb_textprinter_startsubmsg(void *_p, upb_fielddef *f) {
+  upb_textprinter *p = _p;
+  p->indent_depth++;
   upb_bytesink_put(p->bytesink, UPB_STRLIT(" {"));
   if(!p->single_line) upb_bytesink_put(p->bytesink, UPB_STRLIT("\n"));
-  p->indent_depth++;
-  return upb_ok(upb_bytesink_status(p->bytesink));
+  return UPB_CONTINUE;
 }
 
-static bool upb_textprinter_endmsg(upb_textprinter *p)
+static upb_flow_t upb_textprinter_endsubmsg(void *_p)
 {
+  upb_textprinter *p = _p;
   p->indent_depth--;
   upb_textprinter_indent(p);
   upb_bytesink_put(p->bytesink, UPB_STRLIT("}"));
   upb_textprinter_endfield(p);
-  return upb_ok(upb_bytesink_status(p->bytesink));
+  return UPB_CONTINUE;
 }
 
-upb_sink_vtable upb_textprinter_vtbl = {
-  (upb_sink_putdef_fptr)upb_textprinter_putdef,
-  (upb_sink_putval_fptr)upb_textprinter_putval,
-  (upb_sink_putstr_fptr)upb_textprinter_putstr,
-  (upb_sink_startmsg_fptr)upb_textprinter_startmsg,
-  (upb_sink_endmsg_fptr)upb_textprinter_endmsg,
-};
-
 upb_textprinter *upb_textprinter_new() {
+  static upb_handlerset handlers = {
+    NULL,  // startmsg
+    NULL,  // endmsg
+    upb_textprinter_putval,
+    upb_textprinter_startsubmsg,
+    upb_textprinter_endsubmsg,
+  };
   upb_textprinter *p = malloc(sizeof(*p));
-  upb_sink_init(&p->sink, &upb_textprinter_vtbl);
-  p->str = NULL;
+  upb_byte_init(&p->sink, &upb_textprinter_vtbl);
   return p;
 }
 
 void upb_textprinter_free(upb_textprinter *p) {
-  upb_string_unref(p->str);
   free(p);
 }