1 files changed, 67 insertions, 0 deletions
diff --git a/core/upb.c b/core/upb.c
new file mode 100644
index 0000000..a98512d
--- /dev/null
+++ b/core/upb.c
@@ -0,0 +1,67 @@
+/*
+ * upb - a minimalist implementation of protocol buffers.
+ *
+ * Copyright (c) 2009 Joshua Haberman.  See LICENSE for details.
+ *
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "upb.h"
+#include "upb_string.h"
+
+#define alignof(t) offsetof(struct { char c; t x; }, x)
+#define TYPE_INFO(wire_type, ctype, allows_delimited) \
+    {alignof(ctype), sizeof(ctype), wire_type, \
+     (1 << wire_type) | (allows_delimited << UPB_WIRE_TYPE_DELIMITED), \
+     #ctype},
+
+upb_type_info upb_types[] = {
+  {0, 0, 0, 0, ""}, // There is no type 0.
+  TYPE_INFO(UPB_WIRE_TYPE_64BIT,       double,    1)    // DOUBLE
+  TYPE_INFO(UPB_WIRE_TYPE_32BIT,       float,     1)    // FLOAT
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      int64_t,   1)    // INT64
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      uint64_t,  1)    // UINT64
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      int32_t,   1)    // INT32
+  TYPE_INFO(UPB_WIRE_TYPE_64BIT,       uint64_t,  1)    // FIXED64
+  TYPE_INFO(UPB_WIRE_TYPE_32BIT,       uint32_t,  1)    // FIXED32
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      bool,      1)    // BOOL
+  TYPE_INFO(UPB_WIRE_TYPE_DELIMITED,   void*,     1)    // STRING
+  TYPE_INFO(UPB_WIRE_TYPE_START_GROUP, void*,     0)    // GROUP
+  TYPE_INFO(UPB_WIRE_TYPE_DELIMITED,   void*,     1)    // MESSAGE
+  TYPE_INFO(UPB_WIRE_TYPE_DELIMITED,   void*,     1)    // BYTES
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      uint32_t,  1)    // UINT32
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      uint32_t,  1)    // ENUM
+  TYPE_INFO(UPB_WIRE_TYPE_32BIT,       int32_t,   1)    // SFIXED32
+  TYPE_INFO(UPB_WIRE_TYPE_64BIT,       int64_t,   1)    // SFIXED64
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      int32_t,   1)    // SINT32
+  TYPE_INFO(UPB_WIRE_TYPE_VARINT,      int64_t,   1)    // SINT64
+};
+
+void upb_seterr(upb_status *status, enum upb_status_code code,
+                const char *msg, ...)
+{
+  if(upb_ok(status)) {  // The first error is the most interesting.
+    status->str = upb_string_new();
+    char *str = upb_string_getrwbuf(status->str, UPB_ERRORMSG_MAXLEN);
+    status->code = code;
+    va_list args;
+    va_start(args, msg);
+    vsnprintf(str, UPB_ERRORMSG_MAXLEN, msg, args);
+    va_end(args);
+  }
+}
+
+void upb_copyerr(upb_status *to, upb_status *from)
+{
+  to->code = from->code;
+  to->str = upb_string_getref(from->str);
+}
+
+void upb_reset(upb_status *status) {
+  status->code = UPB_STATUS_OK;
+  upb_string_unref(status->str);
+  status->str = NULL;
+}