Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / src / core / lib / transport / error_utils.cc

diff --git a/legacy-libs/grpc-cloned/deps/grpc/src/core/lib/transport/error_utils.cc b/legacy-libs/grpc-cloned/deps/grpc/src/core/lib/transport/error_utils.cc
new file mode 100644 (file)
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+++ b/legacy-libs/grpc-cloned/deps/grpc/src/core/lib/transport/error_utils.cc
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+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/transport/error_utils.h"
+
+#include <grpc/support/string_util.h>
+#include "src/core/lib/iomgr/error_internal.h"
+#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/transport/status_conversion.h"
+
+static grpc_error* recursively_find_error_with_field(grpc_error* error,
+                                                     grpc_error_ints which) {
+  intptr_t unused;
+  // If the error itself has a status code, return it.
+  if (grpc_error_get_int(error, which, &unused)) {
+    return error;
+  }
+  if (grpc_error_is_special(error)) return nullptr;
+  // Otherwise, search through its children.
+  uint8_t slot = error->first_err;
+  while (slot != UINT8_MAX) {
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(error->arena + slot);
+    grpc_error* result = recursively_find_error_with_field(lerr->err, which);
+    if (result) return result;
+    slot = lerr->next;
+  }
+  return nullptr;
+}
+
+void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
+                           grpc_status_code* code, grpc_slice* slice,
+                           grpc_http2_error_code* http_error,
+                           const char** error_string) {
+  // Fast path: We expect no error.
+  if (GPR_LIKELY(error == GRPC_ERROR_NONE)) {
+    if (code != nullptr) *code = GRPC_STATUS_OK;
+    if (slice != nullptr) {
+      // Normally, we call grpc_error_get_str(
+      //   error, GRPC_ERROR_STR_GRPC_MESSAGE, slice).
+      // We can fastpath since we know that:
+      // 1) Error is null
+      // 2) which == GRPC_ERROR_STR_GRPC_MESSAGE
+      // 3) The resulting slice is statically known.
+      // 4) Said resulting slice is of length 0 ("").
+      // This means 3 movs, instead of 10s of instructions and a strlen.
+      *slice = grpc_core::ExternallyManagedSlice("");
+    }
+    if (http_error != nullptr) {
+      *http_error = GRPC_HTTP2_NO_ERROR;
+    }
+    return;
+  }
+
+  // Start with the parent error and recurse through the tree of children
+  // until we find the first one that has a status code.
+  grpc_error* found_error =
+      recursively_find_error_with_field(error, GRPC_ERROR_INT_GRPC_STATUS);
+  if (found_error == nullptr) {
+    /// If no grpc-status exists, retry through the tree to find a http2 error
+    /// code
+    found_error =
+        recursively_find_error_with_field(error, GRPC_ERROR_INT_HTTP2_ERROR);
+  }
+
+  // If we found an error with a status code above, use that; otherwise,
+  // fall back to using the parent error.
+  if (found_error == nullptr) found_error = error;
+
+  grpc_status_code status = GRPC_STATUS_UNKNOWN;
+  intptr_t integer;
+  if (grpc_error_get_int(found_error, GRPC_ERROR_INT_GRPC_STATUS, &integer)) {
+    status = static_cast<grpc_status_code>(integer);
+  } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR,
+                                &integer)) {
+    status = grpc_http2_error_to_grpc_status(
+        static_cast<grpc_http2_error_code>(integer), deadline);
+  }
+  if (code != nullptr) *code = status;
+
+  if (error_string != nullptr && status != GRPC_STATUS_OK) {
+    *error_string = gpr_strdup(grpc_error_string(error));
+  }
+
+  if (http_error != nullptr) {
+    if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR, &integer)) {
+      *http_error = static_cast<grpc_http2_error_code>(integer);
+    } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_GRPC_STATUS,
+                                  &integer)) {
+      *http_error =
+          grpc_status_to_http2_error(static_cast<grpc_status_code>(integer));
+    } else {
+      *http_error = found_error == GRPC_ERROR_NONE ? GRPC_HTTP2_NO_ERROR
+                                                   : GRPC_HTTP2_INTERNAL_ERROR;
+    }
+  }
+
+  // If the error has a status message, use it.  Otherwise, fall back to
+  // the error description.
+  if (slice != nullptr) {
+    if (!grpc_error_get_str(found_error, GRPC_ERROR_STR_GRPC_MESSAGE, slice)) {
+      if (!grpc_error_get_str(found_error, GRPC_ERROR_STR_DESCRIPTION, slice)) {
+        *slice = grpc_slice_from_static_string("unknown error");
+      }
+    }
+  }
+}
+
+bool grpc_error_has_clear_grpc_status(grpc_error* error) {
+  intptr_t unused;
+  if (grpc_error_get_int(error, GRPC_ERROR_INT_GRPC_STATUS, &unused)) {
+    return true;
+  }
+  uint8_t slot = error->first_err;
+  while (slot != UINT8_MAX) {
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(error->arena + slot);
+    if (grpc_error_has_clear_grpc_status(lerr->err)) {
+      return true;
+    }
+    slot = lerr->next;
+  }
+  return false;
+}