commit a5f404d21d350170027600481d99e47f3700f7fd
author jeremy@chromium.org <jeremy@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> Wed Jan 28 04:08:39 2009 +0900
committer Qijiang Fan <fqj@google.com> Thu Jun 04 09:23:30 2020 +0900
tree 3b14a72f9c046d6b991708d491509007b6eaf735
parent 6e849556a0939c2a562ae31c7e440b5029f4dded

Roll forward 8722,8721

Review URL: http://codereview.chromium.org/19028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8734 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: c2c998ce396ec7fd77d8e1277afb3f029f859341

base/file_util.cc

diff --git a/base/file_util.cc b/base/file_util.cc
index 078e3af..8ecb1cc 100644
--- a/base/file_util.cc
+++ b/base/file_util.cc
@@ -4,6 +4,9 @@
 
 #include "base/file_util.h"
 
+#if defined(OS_WIN)
+#include <io.h>
+#endif
 #include <stdio.h>
 
 #include <fstream>
@@ -276,6 +279,24 @@
   return fclose(file) == 0;
 }
 
+bool TruncateFile(FILE* file) {
+  if (file == NULL)
+    return false;
+  long current_offset = ftell(file);
+  if (current_offset == -1)
+    return false;
+#if defined(OS_WIN)
+  int fd = _fileno(file);
+  if (_chsize(fd, current_offset) != 0)
+    return false;
+#else
+  int fd = fileno(file);
+  if (ftruncate(fd, current_offset) != 0)
+    return false;
+#endif
+  return true;
+}
+
 bool ContainsPath(const FilePath &parent, const FilePath& child) {
   FilePath abs_parent = FilePath(parent);
   FilePath abs_child = FilePath(child);