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Diffstat (limited to 'ml/dlib/examples/compress_stream_ex.cpp')
| -rw-r--r-- | ml/dlib/examples/compress_stream_ex.cpp | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/ml/dlib/examples/compress_stream_ex.cpp b/ml/dlib/examples/compress_stream_ex.cpp deleted file mode 100644 index 502400e5e..000000000 --- a/ml/dlib/examples/compress_stream_ex.cpp +++ /dev/null @@ -1,245 +0,0 @@ -// 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 - cmd_line_parser components from the dlib C++ Library. - - This example implements a simple command line compression utility. - - - The output from the program when the -h option is given is: - - Usage: compress_stream_ex (-c|-d|-l) --in input_file --out output_file - Options: - -c Indicates that we want to compress a file. - -d Indicates that we want to decompress a file. - --in <arg> This option takes one argument which specifies the name of the - file we want to compress/decompress. - --out <arg> This option takes one argument which specifies the name of the - output file. - - Miscellaneous Options: - -h Display this help message. - -l <arg> Set the compression level [1-3], 3 is max compression, default - is 2. - -*/ - - - - -#include <dlib/compress_stream.h> -#include <dlib/cmd_line_parser.h> -#include <iostream> -#include <fstream> -#include <string> - -// I am making a typedefs for the versions of compress_stream I want to use. -typedef dlib::compress_stream::kernel_1da cs1; -typedef dlib::compress_stream::kernel_1ea cs2; -typedef dlib::compress_stream::kernel_1ec cs3; - - -using namespace std; -using namespace dlib; - - -int main(int argc, char** argv) -{ - try - { - command_line_parser parser; - - // first I will define the command line options I want. - // Add a -c option and tell the parser what the option is for. - parser.add_option("c","Indicates that we want to compress a file."); - parser.add_option("d","Indicates that we want to decompress a file."); - // add a --in option that takes 1 argument - parser.add_option("in","This option takes one argument which specifies the name of the file we want to compress/decompress.",1); - // add a --out option that takes 1 argument - parser.add_option("out","This option takes one argument which specifies the name of the output file.",1); - // In the code below, we use the parser.print_options() method to print all our - // options to the screen. We can tell it that we would like some options to be - // grouped together by calling set_group_name() before adding those options. In - // general, you can make as many groups as you like by calling set_group_name(). - // However, here we make only one named group. - parser.set_group_name("Miscellaneous Options"); - parser.add_option("h","Display this help message."); - parser.add_option("l","Set the compression level [1-3], 3 is max compression, default is 2.",1); - - - // now I will parse the command line - parser.parse(argc,argv); - - - // Now I will use the parser to validate some things about the command line. - // If any of the following checks fail then an exception will be thrown and it will - // contain a message that tells the user what the problem was. - - // First I want to check that none of the options were given on the command line - // more than once. To do this I define an array that contains the options - // that shouldn't appear more than once and then I just call check_one_time_options() - const char* one_time_opts[] = {"c", "d", "in", "out", "h", "l"}; - parser.check_one_time_options(one_time_opts); - // Here I'm checking that the user didn't pick both the c and d options at the - // same time. - parser.check_incompatible_options("c", "d"); - - // Here I'm checking that the argument to the l option is an integer in the range 1 to 3. - // That is, it should be convertible to an int by dlib::string_assign and be either - // 1, 2, or 3. Note that if you wanted to allow floating point values in the range 1 to - // 3 then you could give a range 1.0 to 3.0 or explicitly supply a type of float or double - // to the template argument of the check_option_arg_range() function. - parser.check_option_arg_range("l", 1, 3); - - // The 'l' option is a sub-option of the 'c' option. That is, you can only select the - // compression level when compressing. This command below checks that the listed - // sub options are always given in the presence of their parent options. - const char* c_sub_opts[] = {"l"}; - parser.check_sub_options("c", c_sub_opts); - - // check if the -h option was given on the command line - if (parser.option("h")) - { - // display all the command line options - cout << "Usage: compress_stream_ex (-c|-d|-l) --in input_file --out output_file\n"; - // This function prints out a nicely formatted list of - // all the options the parser has - parser.print_options(); - return 0; - } - - // Figure out what the compression level should be. If the user didn't supply - // this command line option then a value of 2 will be used. - int compression_level = get_option(parser,"l",2); - - - // make sure one of the c or d options was given - if (!parser.option("c") && !parser.option("d")) - { - cout << "Error in command line:\n You must specify either the c option or the d option.\n"; - cout << "\nTry the -h option for more information." << endl; - return 0; - } - - - string in_file; - string out_file; - - // check if the user told us the input file and if they did then - // get the file name - if (parser.option("in")) - { - in_file = parser.option("in").argument(); - } - else - { - cout << "Error in command line:\n You must specify an input file.\n"; - cout << "\nTry the -h option for more information." << endl; - return 0; - } - - - // check if the user told us the output file and if they did then - // get the file name - if (parser.option("out")) - { - out_file = parser.option("out").argument(); - } - else - { - cout << "Error in command line:\n You must specify an output file.\n"; - cout << "\nTry the -h option for more information." << endl; - return 0; - } - - - // open the files we will be reading from and writing to - ifstream fin(in_file.c_str(),ios::binary); - ofstream fout(out_file.c_str(),ios::binary); - - // make sure the files opened correctly - if (!fin) - { - cout << "Error opening file " << in_file << ".\n"; - return 0; - } - - if (!fout) - { - cout << "Error creating file " << out_file << ".\n"; - return 0; - } - - - - // now perform the actual compression or decompression. - if (parser.option("c")) - { - // save the compression level to the output file - serialize(compression_level, fout); - - switch (compression_level) - { - case 1: - { - cs1 compressor; - compressor.compress(fin,fout); - }break; - case 2: - { - cs2 compressor; - compressor.compress(fin,fout); - }break; - case 3: - { - cs3 compressor; - compressor.compress(fin,fout); - }break; - } - } - else - { - // obtain the compression level from the input file - deserialize(compression_level, fin); - - switch (compression_level) - { - case 1: - { - cs1 compressor; - compressor.decompress(fin,fout); - }break; - case 2: - { - cs2 compressor; - compressor.decompress(fin,fout); - }break; - case 3: - { - cs3 compressor; - compressor.decompress(fin,fout); - }break; - default: - { - cout << "Error in compressed file, invalid compression level" << endl; - }break; - } - } - - - - - } - catch (exception& e) - { - // Note that this will catch any cmd_line_parse_error exceptions and print - // the default message. - cout << e.what() << endl; - } -} - - - - - |