1 files changed, 139 insertions, 0 deletions
diff --git a/libgo/runtime/go-reflect-map.c b/libgo/runtime/go-reflect-map.c
new file mode 100644
index 000000000..67960dee4
--- /dev/null
+++ b/libgo/runtime/go-reflect-map.c
@@ -0,0 +1,139 @@
+/* go-reflect-map.c -- map reflection support for Go.
+
+   Copyright 2009, 2010 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "go-alloc.h"
+#include "go-type.h"
+#include "map.h"
+
+/* This file implements support for reflection on maps.  These
+   functions are called from reflect/value.go.  */
+
+extern _Bool mapaccess (unsigned char *, unsigned char *, unsigned char *)
+  asm ("libgo_reflect.reflect.mapaccess");
+
+_Bool
+mapaccess (unsigned char *m, unsigned char *key, unsigned char *val)
+{
+  struct __go_map *map = (struct __go_map *) m;
+  void *p;
+  const struct __go_type_descriptor *val_descriptor;
+
+  p = __go_map_index (map, key, 0);
+  if (p == NULL)
+    return 0;
+  else
+    {
+      val_descriptor = map->__descriptor->__map_descriptor->__val_type;
+      __builtin_memcpy (val, p, val_descriptor->__size);
+      return 1;
+    }
+}
+
+extern void mapassign (unsigned char *, unsigned char *, unsigned char *)
+  asm ("libgo_reflect.reflect.mapassign");
+
+void
+mapassign (unsigned char *m, unsigned char *key, unsigned char *val)
+{
+  struct __go_map *map = (struct __go_map *) m;
+
+  if (val == NULL)
+    __go_map_delete (map, key);
+  else
+    {
+      void *p;
+      const struct __go_type_descriptor *val_descriptor;
+
+      p = __go_map_index (map, key, 1);
+      val_descriptor = map->__descriptor->__map_descriptor->__val_type;
+      __builtin_memcpy (p, val, val_descriptor->__size);
+    }
+}
+
+extern int32_t maplen (unsigned char *)
+  asm ("libgo_reflect.reflect.maplen");
+
+int32_t
+maplen (unsigned char *m __attribute__ ((unused)))
+{
+  struct __go_map *map = (struct __go_map *) m;
+  return (int32_t) map->__element_count;
+}
+
+extern unsigned char *mapiterinit (unsigned char *)
+  asm ("libgo_reflect.reflect.mapiterinit");
+
+unsigned char *
+mapiterinit (unsigned char *m)
+{
+  struct __go_hash_iter *it;
+
+  it = __go_alloc (sizeof (struct __go_hash_iter));
+  __go_mapiterinit ((struct __go_map *) m, it);
+  return (unsigned char *) it;
+}
+
+extern void mapiternext (unsigned char *)
+  asm ("libgo_reflect.reflect.mapiternext");
+
+void
+mapiternext (unsigned char *it)
+{
+  __go_mapiternext ((struct __go_hash_iter *) it);
+}
+
+extern _Bool mapiterkey (unsigned char *, unsigned char *)
+  asm ("libgo_reflect.reflect.mapiterkey");
+
+_Bool
+mapiterkey (unsigned char *ita, unsigned char *key)
+{
+  struct __go_hash_iter *it = (struct __go_hash_iter *) ita;
+
+  if (it->entry == NULL)
+    return 0;
+  else
+    {
+      __go_mapiter1 (it, key);
+      return 1;
+    }
+}
+
+/* Make a new map.  We have to build our own map descriptor.  */
+
+extern unsigned char *makemap (const struct __go_map_type *)
+  asm ("libgo_reflect.reflect.makemap");
+
+unsigned char *
+makemap (const struct __go_map_type *t)
+{
+  struct __go_map_descriptor *md;
+  unsigned int o;
+  const struct __go_type_descriptor *kt;
+  const struct __go_type_descriptor *vt;
+
+  /* FIXME: Reference count.  */
+  md = (struct __go_map_descriptor *) __go_alloc (sizeof (*md));
+  md->__map_descriptor = t;
+  o = sizeof (void *);
+  kt = t->__key_type;
+  o = (o + kt->__field_align - 1) & ~ (kt->__field_align - 1);
+  md->__key_offset = o;
+  o += kt->__size;
+  vt = t->__val_type;
+  o = (o + vt->__field_align - 1) & ~ (vt->__field_align - 1);
+  md->__val_offset = o;
+  o += vt->__size;
+  o = (o + sizeof (void *) - 1) & ~ (sizeof (void *) - 1);
+  o = (o + kt->__field_align - 1) & ~ (kt->__field_align - 1);
+  o = (o + vt->__field_align - 1) & ~ (vt->__field_align - 1);
+  md->__entry_size = o;
+
+  return (unsigned char *) __go_new_map (md, 0);
+}