Author: wyoung
Date: Tue May 18 19:19:10 2010
New Revision: 2648
URL: http://svn.gna.org/viewcvs/mysqlpp?rev=2648&view=rev
Log:
Comment improvement
Modified:
trunk/examples/load_jpeg.cpp
Modified: trunk/examples/load_jpeg.cpp
URL:
http://svn.gna.org/viewcvs/mysqlpp/trunk/examples/load_jpeg.cpp?rev=2648&r1=2647&r2=2648&view=diff
==============================================================================
--- trunk/examples/load_jpeg.cpp (original)
+++ trunk/examples/load_jpeg.cpp Tue May 18 19:19:10 2010
@@ -80,13 +80,12 @@
img_name = cmdline.extra_args()[0];
ifstream img_file(img_name.c_str(), ios::binary);
if (img_file) {
- // File opened, so try to slurp its contents into RAM. (See
- // http://stackoverflow.com/questions/116038/) for explanation.)
+ // Slurp file contents into RAM with minimum copying. (Idiom
+ // explained here: http://stackoverflow.com/questions/116038/)
//
- // The key thing to get from this function is that we're storing
- // the binary data in a mysqlpp::sql_blob value, which we assign
- // from a C++ string (stringstream::str()), thus not truncating
- // the string at the first embedded null character.
+ // By loading the file into a C++ string (stringstream::str())
+ // and assigning that directly to a mysqlpp::sql_blob, we avoid
+ // truncating the binary data at the first null character.
img.data.data = static_cast<const stringstream*>(
&(stringstream() << img_file.rdbuf()))->str();
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