1 files changed, 78 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/load_file.cc b/src/core/lib/iomgr/load_file.cc
new file mode 100644
index 0000000000..0b4d41ea4b
--- /dev/null
+++ b/src/core/lib/iomgr/load_file.cc
@@ -0,0 +1,78 @@
+/*
+ *
+ * Copyright 2015 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 "src/core/lib/iomgr/load_file.h"
+
+#include <errno.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/support/block_annotate.h"
+#include "src/core/lib/support/string.h"
+
+grpc_error *grpc_load_file(const char *filename, int add_null_terminator,
+                           grpc_slice *output) {
+  unsigned char *contents = NULL;
+  size_t contents_size = 0;
+  grpc_slice result = grpc_empty_slice();
+  FILE *file;
+  size_t bytes_read = 0;
+  grpc_error *error = GRPC_ERROR_NONE;
+
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  file = fopen(filename, "rb");
+  if (file == NULL) {
+    error = GRPC_OS_ERROR(errno, "fopen");
+    goto end;
+  }
+  fseek(file, 0, SEEK_END);
+  /* Converting to size_t on the assumption that it will not fail */
+  contents_size = (size_t)ftell(file);
+  fseek(file, 0, SEEK_SET);
+  contents = (unsigned char *)gpr_malloc(contents_size +
+                                         (add_null_terminator ? 1 : 0));
+  bytes_read = fread(contents, 1, contents_size, file);
+  if (bytes_read < contents_size) {
+    error = GRPC_OS_ERROR(errno, "fread");
+    GPR_ASSERT(ferror(file));
+    goto end;
+  }
+  if (add_null_terminator) {
+    contents[contents_size++] = 0;
+  }
+  result = grpc_slice_new(contents, contents_size, gpr_free);
+
+end:
+  *output = result;
+  if (file != NULL) fclose(file);
+  if (error != GRPC_ERROR_NONE) {
+    grpc_error *error_out =
+        grpc_error_set_str(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                               "Failed to load file", &error, 1),
+                           GRPC_ERROR_STR_FILENAME,
+                           grpc_slice_from_copied_string(
+                               filename));  // TODO(ncteisen), always static?
+    GRPC_ERROR_UNREF(error);
+    error = error_out;
+  }
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  return error;
+}