From 1fd2c3a914554419295ba65270849c26409ca5bc Mon Sep 17 00:00:00 2001
From: "jan.reininghaus" <jan.reininghaus@8e3bb3c2-eed4-f18f-5264-0b6c94e6926d>
Date: Wed, 8 May 2013 13:52:45 +0000
Subject: new info.cpp program that prints some information of a given
 filtration

git-svn-id: https://phat.googlecode.com/svn/trunk@70 8e3bb3c2-eed4-f18f-5264-0b6c94e6926d
---
 CMakeLists.txt |  1 +
 src/info.cpp   | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 src/info.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62b0584..75ac88f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,6 +49,7 @@ FILE(GLOB representations_includes "include/phat/representations/*.h")
 add_executable (simple_example src/simple_example.cpp ${all_headers})
 add_executable (self_test src/self_test.cpp ${all_headers})
 add_executable (phat src/phat.cpp ${all_headers})
+add_executable (info src/info.cpp ${all_headers})
 add_executable (benchmark src/benchmark.cpp ${all_headers})
 
 source_group(Header\ Files FILES ${general_includes})
diff --git a/src/info.cpp b/src/info.cpp
new file mode 100644
index 0000000..fd2cdad
--- /dev/null
+++ b/src/info.cpp
@@ -0,0 +1,77 @@
+/*  Copyright 2013 IST Austria
+    Contributed by: Jan Reininghaus
+
+    This file is part of PHAT.
+
+    PHAT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PHAT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with PHAT.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <phat/boundary_matrix.h>
+
+void print_help() {
+    std::cerr << "Usage: " << "info " << "[options] input_filename_0 input_filename_1 ... input_filename_N" << std::endl;
+    std::cerr << std::endl;
+    std::cerr << "Options:" << std::endl;
+    std::cerr << std::endl;
+    std::cerr << "--ascii   --  use ascii file format" << std::endl;
+    std::cerr << "--binary  --  use binary file format (default)" << std::endl;
+    std::cerr << "--help    --  prints this screen" << std::endl;
+}
+
+void print_help_and_exit() {
+    print_help();
+    exit( EXIT_FAILURE );
+}
+
+void parse_command_line( int argc, char** argv, bool& use_binary, std::vector< std::string >& input_filenames ) {
+
+    if( argc < 2 ) print_help_and_exit();
+
+    int number_of_options = 0;
+    for( int idx = 1; idx < argc; idx++ ) {
+        const std::string argument = argv[ idx ];
+        if( argument.size() > 2 && argument[ 0 ] == '-' && argument[ 1 ] == '-' ) {
+            if( argument == "--ascii" ) use_binary = false;
+            else if( argument == "--binary" ) use_binary = true;
+            else if( argument == "--help" ) print_help_and_exit();
+            else print_help_and_exit();
+        } else {
+            input_filenames.push_back( argument );
+        }
+    }
+}
+
+int main( int argc, char** argv )
+{
+    bool use_binary = true; // interpret inputs as binary or ascii files
+    std::vector< std::string > input_filenames; // name of file that contains the boundary matrix
+
+    parse_command_line( argc, argv, use_binary, input_filenames );
+
+    for( int idx_input = 0; idx_input < input_filenames.size(); idx_input++ ) {
+        std::string input_filename = input_filenames[ idx_input ];
+        phat::boundary_matrix<> matrix;
+        bool read_successful = use_binary ? matrix.load_binary( input_filename ) : matrix.load_ascii( input_filename );
+        if( !read_successful ) {
+            std::cerr << std::endl << " Error opening file " << input_filename << std::endl;
+            print_help_and_exit();
+        }
+
+        std::cout << input_filename << ":" << std::endl;
+        std::cout << "\t" << "num_cols = " << matrix.get_num_cols() << std::endl;
+        std::cout << "\t" << "max_dim = " << (int)matrix.get_max_dim() << std::endl;
+        std::cout << "\t" << "max_col_entries = " << matrix.get_max_col_entries() << std::endl;
+        std::cout << "\t" << "max_row_entries = " << matrix.get_max_row_entries() << std::endl;
+        std::cout << "\t" << "total_nr_of_entries = " << matrix.get_num_entries() << std::endl;
+    }
+}
-- 
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