From 75e84ece09ce9440d42032c4e67752d2f6e89e93 Mon Sep 17 00:00:00 2001
From: Stas Degteff <stas_degteff@users.sourceforge.net>
Date: Thu, 17 Feb 2011 19:51:28 +0000
Subject: [PATCH] Add C++ version of the function GetFilesize()

---
 goldlib/gall/gfilutil.h   |  8 ++++++--
 goldlib/gall/gfilutl2.cpp | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/goldlib/gall/gfilutil.h b/goldlib/gall/gfilutil.h
index ee82e59..2518f37 100644
--- a/goldlib/gall/gfilutil.h
+++ b/goldlib/gall/gfilutil.h
@@ -179,10 +179,14 @@ inline time32_t GetFiletime(const std::string& file) { return GetFiletime(file.c
 inline long FiletimeCmp(const char* file1, const char* file2) { return long(GetFiletime(file1) - GetFiletime(file2)); }
 inline long FiletimeCmp(const std::string& file1, const std::string& file2) { return FiletimeCmp(file1.c_str(), file2.c_str()); }
 
-//  Get size of open file
+//  Get size of open file handle
 long fsize(FILE* fp);
-//  Get size of file
+
+//  Get size of disk file.  Return values:
+// positive number or zero - size of file,
+// negative number - error (and error code is stored in errno)
 long GetFilesize(const char* file);
+long GetFilesize(const std::string& filename);
 
 //  Add path to filename if no path is present. Uses static string and don't chech size of 'path', be careful!
 const char* AddPath(const char* path, const char* file);
diff --git a/goldlib/gall/gfilutl2.cpp b/goldlib/gall/gfilutl2.cpp
index 526f728..60e6526 100644
--- a/goldlib/gall/gfilutl2.cpp
+++ b/goldlib/gall/gfilutl2.cpp
@@ -62,6 +62,24 @@ std::string& StripBackslash(std::string& p) {
   return p;
 }
 
+//  ------------------------------------------------------------------
+//  Get size of file. Return values:
+// positive number or zero - size of file,
+// negative number - error (and error code is stored in errno)
+
+long GetFilesize(const std::string& filename) {
+
+  if(filename.empty()) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  struct stat info;
+  if(stat(filename.c_str(), &info) == 0)
+    return info.st_size;
+  return -1;
+}
+
 //  ------------------------------------------------------------------
 //  Add path to filename, if no path is set. Don't chech size of 'path', be careful!