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-rw-r--r--ml/dlib/examples/file_to_code_ex.cpp111
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diff --git a/ml/dlib/examples/file_to_code_ex.cpp b/ml/dlib/examples/file_to_code_ex.cpp
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-// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
-/*
- This is an example illustrating the use of the compress_stream and
- base64 components from the dlib C++ Library.
-
- It reads in a file from the disk and compresses it in an in memory buffer and
- then converts that buffer into base64 text. The final step is to output to
- the screen some C++ code that contains this base64 encoded text and can decompress
- it back into its original form.
-*/
-
-
-#include <iostream>
-#include <fstream>
-#include <sstream>
-#include <string>
-#include <cstdlib>
-#include <dlib/compress_stream.h>
-#include <dlib/base64.h>
-
-
-using namespace std;
-using namespace dlib;
-
-int main(int argc, char** argv)
-{
- if (argc != 2)
- {
- cout << "You must give a file name as the argument to this program.\n" << endl;
- cout << "This program reads in a file from the disk and compresses\n"
- << "it in an in memory buffer and then converts that buffer \n"
- << "into base64 text. The final step is to output to the screen\n"
- << "some C++ code that contains this base64 encoded text and can\n"
- << "decompress it back into its original form.\n" << endl;
-
- return EXIT_FAILURE;
- }
-
- // open the file the user specified on the command line
- ifstream fin(argv[1], ios::binary);
- if (!fin) {
- cout << "can't open file " << argv[1] << endl;
- return EXIT_FAILURE;
- }
-
- ostringstream sout;
- istringstream sin;
-
- // this is the object we will use to do the base64 encoding
- base64 base64_coder;
- // this is the object we will use to do the data compression
- compress_stream::kernel_1ea compressor;
-
- // compress the contents of the file and store the results in the string stream sout
- compressor.compress(fin,sout);
- sin.str(sout.str());
- sout.clear();
- sout.str("");
-
- // now base64 encode the compressed data
- base64_coder.encode(sin,sout);
-
- sin.clear();
- sin.str(sout.str());
- sout.str("");
-
- // the following is a little funny looking but all it does is output some C++ code
- // that contains the compressed/base64 data and the C++ code that can decode it back
- // into its original form.
- sout << "#include <sstream>\n";
- sout << "#include <dlib/compress_stream.h>\n";
- sout << "#include <dlib/base64.h>\n";
- sout << "\n";
- sout << "// This function returns the contents of the file '" << argv[1] << "'\n";
- sout << "const std::string get_decoded_string()\n";
- sout << "{\n";
- sout << " dlib::base64 base64_coder;\n";
- sout << " dlib::compress_stream::kernel_1ea compressor;\n";
- sout << " std::ostringstream sout;\n";
- sout << " std::istringstream sin;\n\n";
-
-
- sout << " // The base64 encoded data from the file '" << argv[1] << "' we want to decode and return.\n";
- string temp;
- getline(sin,temp);
- while (sin && temp.size() > 0)
- {
- sout << " sout << \"" << temp << "\";\n";
- getline(sin,temp);
- }
-
- sout << "\n";
- sout << " // Put the data into the istream sin\n";
- sout << " sin.str(sout.str());\n";
- sout << " sout.str(\"\");\n\n";
- sout << " // Decode the base64 text into its compressed binary form\n";
- sout << " base64_coder.decode(sin,sout);\n";
- sout << " sin.clear();\n";
- sout << " sin.str(sout.str());\n";
- sout << " sout.str(\"\");\n\n";
- sout << " // Decompress the data into its original form\n";
- sout << " compressor.decompress(sin,sout);\n\n";
- sout << " // Return the decoded and decompressed data\n";
- sout << " return sout.str();\n";
- sout << "}\n";
-
-
- // finally output our encoded data and its C++ code to the screen
- cout << sout.str() << endl;
-}
-