Index: ppapi/native_client/src/trusted/plugin/file_utils.cc |
diff --git a/ppapi/native_client/src/trusted/plugin/file_utils.cc b/ppapi/native_client/src/trusted/plugin/file_utils.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..50600a2a201e1e5c6f3a16c0d5a9c12b26afe743 |
--- /dev/null |
+++ b/ppapi/native_client/src/trusted/plugin/file_utils.cc |
@@ -0,0 +1,77 @@ |
+// Copyright (c) 2013 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+// Some common file utilities for plugin code. |
+ |
+#include "native_client/src/trusted/plugin/file_utils.h" |
+ |
+#include <fcntl.h> |
+#include <stdio.h> |
+#include <stdlib.h> |
+ |
+#include <sys/stat.h> |
+#include <sys/types.h> |
+ |
+#include "native_client/src/include/nacl_scoped_ptr.h" |
+#include "native_client/src/include/portability_io.h" |
+#include "native_client/src/include/portability_string.h" |
+ |
+ |
+namespace plugin { |
+namespace file_utils { |
+ |
+StatusCode SlurpFile(int32_t fd, |
+ nacl::string& out_buf, |
+ size_t max_size_to_read) { |
+ struct stat stat_buf; |
+ if (fstat(fd, &stat_buf) != 0) { |
+ CLOSE(fd); |
+ return PLUGIN_FILE_ERROR_STAT; |
+ } |
+ |
+ // Figure out how large a buffer we need to slurp the whole file (with a |
+ // '\0' at the end). |
+ size_t bytes_to_read = static_cast<size_t>(stat_buf.st_size); |
+ if (bytes_to_read > max_size_to_read - 1) { |
+ CLOSE(fd); |
+ return PLUGIN_FILE_ERROR_FILE_TOO_LARGE; |
+ } |
+ |
+ FILE* input_file = fdopen(fd, "rb"); |
+ if (!input_file) { |
+ CLOSE(fd); |
+ return PLUGIN_FILE_ERROR_OPEN; |
+ } |
+ // From here on, closing input_file will automatically close fd. |
+ |
+ nacl::scoped_array<char> buffer(new char[bytes_to_read + 1]); |
+ if (buffer == NULL) { |
+ fclose(input_file); |
+ return PLUGIN_FILE_ERROR_MEM_ALLOC; |
+ } |
+ |
+ size_t total_bytes_read = 0; |
+ while (bytes_to_read > 0) { |
+ size_t bytes_this_read = fread(&buffer[total_bytes_read], |
+ sizeof(char), |
+ bytes_to_read, |
+ input_file); |
+ if (bytes_this_read < bytes_to_read && (feof(input_file) || |
+ ferror(input_file))) { |
+ fclose(input_file); |
+ return PLUGIN_FILE_ERROR_READ; |
+ } |
+ total_bytes_read += bytes_this_read; |
+ bytes_to_read -= bytes_this_read; |
+ } |
+ |
+ fclose(input_file); |
+ buffer[total_bytes_read] = '\0'; |
+ out_buf = buffer.get(); |
+ return PLUGIN_FILE_SUCCESS; |
+} |
+ |
+} // namespace file_utils |
+} // namespace plugin |
+ |