Add a routine to report write errors to the list of failure-reporting

routines handled by epan/report_err.c.

Move copy_binary_file() in file.c to epan/filesystem.c, and rename it to
copy_file_binary_mode() (to clarify that it *can* copy text files;
arguably, *all* files are "binary" unless you're on, say, an IBM 1401
:-)).  Have it use the report_err.c routines, so it works in
console-mode programs.

Clean up some comments while we're at it.

svn path=/trunk/; revision=27456

1 files changed, 13 insertions, 1 deletions

diff --git a/epan/filesystem.h b/epan/filesystem.h
index b8dba0fcd5..a97f8d7880 100644
--- a/epan/filesystem.h
+++ b/epan/filesystem.h
@@ -234,10 +234,22 @@ extern gboolean deletefile (const char *path);
 extern gboolean file_exists(const char *fname);
 
 /*
- * Check, if two filenames are identical (with absolute and relative paths).
+ * Check if two filenames are identical (with absolute and relative paths).
  */
 extern gboolean files_identical(const char *fname1, const char *fname2);
 
+/*
+ * Copy a file in binary mode, for those operating systems that care about
+ * such things.  This should be OK for all files, even text files, as
+ * we'll copy the raw bytes, and we don't look at the bytes as we copy
+ * them.
+ *
+ * Returns TRUE on success, FALSE on failure. If a failure, it also
+ * displays a simple dialog window with the error message.
+ */
+extern gboolean copy_file_binary_mode(const char *from_filename,
+    const char *to_filename);
+
 #ifdef _WIN32
 /*
  * utf8 version of getenv, needed to get win32 filename paths