Initial checkin of gRPC to third_party/

third_party/grpc/src/core/support/load_file.c

Index: third_party/grpc/src/core/support/load_file.c
diff --git a/third_party/grpc/src/core/support/load_file.c b/third_party/grpc/src/core/support/load_file.c
new file mode 100644
index 0000000000000000000000000000000000000000..650bd62ccbe0e039deaa0e7873a3ecb5df49a65c
--- /dev/null
+++ b/third_party/grpc/src/core/support/load_file.c
@@ -0,0 +1,91 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/support/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/support/block_annotate.h"
+#include "src/core/support/string.h"
+
+gpr_slice gpr_load_file(const char *filename, int add_null_terminator,
+                        int *success) {
+  unsigned char *contents = NULL;
+  size_t contents_size = 0;
+  char *error_msg = NULL;
+  gpr_slice result = gpr_empty_slice();
+  FILE *file;
+  size_t bytes_read = 0;
+
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  file = fopen(filename, "rb");
+  if (file == NULL) {
+    gpr_asprintf(&error_msg, "Could not open file %s (error = %s).", filename,
+                 strerror(errno));
+    GPR_ASSERT(error_msg != NULL);
+    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 = gpr_malloc(contents_size + (add_null_terminator ? 1 : 0));
+  bytes_read = fread(contents, 1, contents_size, file);
+  if (bytes_read < contents_size) {
+    GPR_ASSERT(ferror(file));
+    gpr_asprintf(&error_msg, "Error %s occured while reading file %s.",
+                 strerror(errno), filename);
+    GPR_ASSERT(error_msg != NULL);
+    goto end;
+  }
+  if (success != NULL) *success = 1;
+  if (add_null_terminator) {
+    contents[contents_size++] = 0;
+  }
+  result = gpr_slice_new(contents, contents_size, gpr_free);
+
+end:
+  if (error_msg != NULL) {
+    gpr_log(GPR_ERROR, "%s", error_msg);
+    gpr_free(error_msg);
+    if (success != NULL) *success = 0;
+  }
+  if (file != NULL) fclose(file);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  return result;
+}