1 files changed, 115 insertions, 0 deletions
diff --git a/src/config.cpp b/src/config.cpp
new file mode 100644
index 0000000..60e3345
--- /dev/null
+++ b/src/config.cpp
@@ -0,0 +1,115 @@
+/*
+Copyright 2015 Ian Jauslin
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "config.h"
+
+#define READMODE_DEFAULT 0
+#define READMODE_TIME 1
+#define READMODE_SLIDELIST 2
+
+// constructor
+Config::Config(int argc,char* argv[]){
+  // defaults
+  loadDefaults();
+  // CLI options
+  readconf(argc,argv);
+}
+
+// default values
+void Config::loadDefaults(){
+  document_path='\0';
+  presentation_time=15;
+  slidelist_path='\0';
+}
+
+// read CLI options
+void Config::readconf(int argc,char* argv[]){
+  int i;
+  // mode specifier (e.g. reading duration?)
+  int mode=READMODE_DEFAULT;
+  // loop over arguments
+  for(i=1;i<argc;i++){
+    // the i=th argument
+    char* arg=argv[i];
+    // behavior depends on mode
+    switch(mode){
+    // default mode
+    case READMODE_DEFAULT:
+      // - means flagging options should follow
+      if(arg[0]=='-'){
+	// loop over flags following -
+	for(arg++;*arg!='\0';arg++){
+	  switch (*arg){
+	  // duration flag
+	  case 't':
+	    //go into duration reading mode (next argument should be the duration)
+	    mode=READMODE_TIME;
+	      break;
+	  // slidelist flag
+	  case 's':
+	    //go into slidelist reading mode
+	    mode=READMODE_SLIDELIST;
+	  }
+	}
+      }
+      else{
+	// if the argument does not start with -, then it must denote the path to the PDF file
+	document_path=arg;
+      }
+      break;
+    // read duration mode
+    case READMODE_TIME:
+      //check that the argument is an integer
+      if(check_int(arg)){
+	sscanf(arg,"%d",&presentation_time);
+      }
+      else{
+	printf("syntax error: received argument '-t %s' when -t must be followed by an integer\n",arg);
+      }
+      // back to default mode for next argument
+      mode=READMODE_DEFAULT;
+      break;
+
+    // read slidelist mode
+    case READMODE_SLIDELIST:
+      slidelist_path=arg;
+      // back to default mode for next argument
+      mode=READMODE_DEFAULT;
+    }
+  }
+}
+
+// display configuration options
+void Config::showconf(){
+  printf("document: %s\n",document_path);
+  printf("presentation duration: %d\n",presentation_time);
+  printf("slidelist: %s\n",slidelist_path);
+}
+
+// check whether a string is an integer
+bool Config::check_int(char* string){
+  // yes?
+  bool ret=1;
+  for(;*string!='\0';string++){
+    // is the character a digit?
+    ret=ret && isdigit(*string);
+  }
+  return(ret);
+}
+
+// empty destructor
+Config::~Config(){
+}