Sync to internal Google development.

1 files changed, 43 insertions, 0 deletions

diff --git a/upb/bindings/stdc/error.c b/upb/bindings/stdc/error.c
new file mode 100644
index 0000000..85c9ca6
--- /dev/null
+++ b/upb/bindings/stdc/error.c
@@ -0,0 +1,43 @@
+/*
+ * upb - a minimalist implementation of protocol buffers.
+ *
+ * Copyright (c) 2009 Google Inc.  See LICENSE for details.
+ * Author: Josh Haberman <jhaberman@gmail.com>
+ *
+ * Handling of errno.
+ */
+
+#include "upb/stdc/error.h"
+
+#include <string.h>
+
+void upb_status_fromerrno(upb_status *status, int code) {
+  if (code != 0 && !upb_errno_is_wouldblock(code)) {
+    status->error = true;
+    upb_status_setcode(status, &upb_stdc_errorspace, code);
+  }
+}
+
+bool upb_errno_is_wouldblock(int code) {
+  return
+#ifdef EAGAIN
+      code == EAGAIN ||
+#endif
+#ifdef EWOULDBLOCK
+      code == EWOULDBLOCK ||
+#endif
+      false;
+}
+
+bool upb_stdc_codetostr(int code, char *buf, size_t len) {
+  // strerror() may use static buffers and is not guaranteed to be thread-safe,
+  // but it appears that it is not subject to buffer overflows in practice, and
+  // it used by other portable and high-quality software like Lua.  For more
+  // discussion see: http://thread.gmane.org/gmane.comp.lang.lua.general/89506
+  char *err = strerror(code);
+  if (strlen(err) >= len) return false;
+  strcpy(buf, err);
+  return true;
+}
+
+upb_errorspace upb_stdc_errorspace = {"stdc", &upb_stdc_codetostr};