X-Git-Url: http://gitweb.hachti.de/?a=blobdiff_plain;f=pc-tools%2Fldc2%2Fsrc%2Fargument_reader.cpp;fp=pc-tools%2Fldc2%2Fsrc%2Fargument_reader.cpp;h=e927a37c95f997b7d3421884598385f909aadd5d;hb=632a71a231a9bdd73a670ec686e13dd049921182;hp=0000000000000000000000000000000000000000;hpb=798b0c1d967a7d8ac3c7a867d41bfa7b8e824048;p=h316.git

diff --git a/pc-tools/ldc2/src/argument_reader.cpp b/pc-tools/ldc2/src/argument_reader.cpp
new file mode 100644
index 0000000..e927a37
--- /dev/null
+++ b/pc-tools/ldc2/src/argument_reader.cpp
@@ -0,0 +1,268 @@
+#include "argument_reader.hh"
+#include <stdio.h>
+
+/*!
+ *\brief Constructor.
+ *
+ * This constructor makes a new argument_reader ready to use.
+ *\arg app_name Name of the application as mentioned in the
+ *     "Use: <appname> ..." help message.
+ */
+argument_reader::argument_reader(string  app_name){
+  progname=app_name;
+}
+
+  
+/*!
+ *\brief Add a new parameter to be searched for.
+ *\param shortname A character for the short form. 
+ *                 For example the 'h' in -h
+ *\param longname  The double dash longname. For example 
+ *                 "input_file=" in --input_file= or
+ *                 "ignore_errors" in --ignore--errors
+ *\param description A detailed parameter description.
+ *\param status Pointer to an integer. Will be set to 1 if arg found.
+ *\target Pointer to a value should be read. 
+ *                If no value is needed, pass NULL.
+ *\placeholder A placeholder for the documentation. 
+ *             For example "<filename>" in -f<filename>
+ */
+void argument_reader::add_param (string shortname, string longname,
+				 string description, int * status, 
+				 string * target, string placeholder){
+  
+  if(status!=NULL) arguments.insert(arguments.end(),
+				    parameter(shortname,longname, description,
+					      status,target,placeholder)
+				    );
+}
+
+
+/*!
+ *\brief Add an accepted argument to the argument reader.
+ *\param placeholder Something like "<input-file>".
+ *\param description Text describing the argument.
+ *\param status A pointer to a status variable. Will be set to 0 immediately.
+ *       If the argument is filled in, it will be set to 1.
+ *\param target A pointer to a c++ string where the argument goes to.
+ *
+ *\note Arguments are filled in the order of adding them to the 
+ *      argument reader.
+ *      There would be no other way to determine the order.
+ */
+void argument_reader::add_argument(string placeholder, string description, int * status, string * target){
+  if (target!=NULL) if(status!=NULL)
+    free_arguments.insert(free_arguments.end(),free_parameter(placeholder,description,status,target));
+}
+
+
+/*!
+ * Read in the args passed to main().
+ *\returns empty vector  on success or the error messages to be output.
+ */
+vector<string> argument_reader::read_args(int argc, char ** args){
+  vector<string> result;
+  vector<string> argv;
+  for (char ** akt=args; *akt ;akt++) argv.insert(argv.end(),string(*akt));
+  
+  unsigned int free_parms_count=0;
+  for (vector<string>::iterator akt_p=argv.begin()+1;akt_p<argv.end();akt_p++){ //Argument loop
+    
+    // Look for long argument
+    if ((akt_p->substr(0,2)=="--")&&(free_parms_count==0)){
+      int found=0;
+      for (vector<parameter>::iterator parm_p=arguments.begin();parm_p<arguments.end();parm_p++){
+	if (akt_p->substr(2,parm_p->longname.length())==parm_p->longname){
+	  found=1;
+	  *(parm_p->status)=1;
+	  if (parm_p->target){
+	    if (akt_p->length()>2+parm_p->longname.length()){
+	      *(parm_p->target)=akt_p->substr(2+parm_p->longname.length());
+	      
+	    } else // Word not long enough
+	      if (akt_p+1<argv.end()) { // If next word existend
+		*(parm_p->status)=1;
+		*(parm_p->target)=*(++akt_p);
+	      } else { // No next word :-(
+		result.insert(result.end(),
+			      "Parameter --"+parm_p->longname+parm_p->placeholder+" needs an Argument!");
+	      } 
+	  } // arg needed
+	}
+      } // search for loop
+      if (!found) result.insert(result.end(),"Unknown parameter: "+*akt_p);
+    } else { // No -- param, now look for switches
+      if (((*akt_p)[0]=='-')&&(free_parms_count==0)){
+	int stop_char_loop=0;
+	for (unsigned int pos=1; pos<akt_p->length()&& !stop_char_loop ;pos++){
+	  int found=0;
+	  for (vector<parameter>::iterator parm_p=arguments.begin();parm_p<arguments.end();parm_p++){
+	    if (parm_p->shortname[0]==(*akt_p)[pos]){
+	      found=1;
+	      (*parm_p->status)=1;
+	      if (parm_p->target){ // Need argument
+		if (akt_p->length()>pos+1){
+		  *(parm_p->target)=akt_p->substr(pos+1);
+		  stop_char_loop=1;
+		} else { // Word not long enough
+		  if (akt_p+1<argv.end()) { // If next word existend
+		    *(parm_p->target)=*(++akt_p);
+		    stop_char_loop=1;
+		  } else { // No next word :-(
+		    result.insert(result.end(),
+				  "Parameter --"+parm_p->longname+parm_p->placeholder+" needs an Argument!");
+		  }
+		} 
+	      } // arg needed
+	    } //if match
+	  } //args loop
+	  if (!found) result.insert(result.end(),"Unknown switch: "+akt_p->substr(pos,1));
+	} // char loop
+      }// switch found
+      else{ // no switch found
+	if (free_parms_count<free_arguments.size()){
+	  *(free_arguments[free_parms_count].target)=*akt_p;
+	} 
+	free_parms_count++;
+      }
+    } //looking for not -- args
+  } // argv loop
+  if (free_parms_count>free_arguments.size()) result.insert(result.begin(),"Too many arguments!");
+  if (!result.empty()){
+    result.insert(result.begin(),"Error!");
+    result.insert(result.begin(),"");
+  }
+//   if (!result.empty()){
+//     get_help(result);
+//   }
+  return result;
+}
+
+/*!
+ *\brief Generate help.
+ *\arg target Reference to a vector<string> to which lots of helpful
+ *     strings are appended.
+ */
+void argument_reader::get_help(vector<string> & result){
+  
+  result.insert(result.end(),"");
+  string line="Usage: "+progname;
+  for (vector<parameter>::iterator parm_p=arguments.begin();parm_p<arguments.end();parm_p++){
+    string addstr=" [-"+parm_p->shortname;
+    if (parm_p->target!=0) addstr+=parm_p->placeholder;
+    addstr+="]";
+    if (line.length()+addstr.length()>79){
+      result.insert(result.end(),line);
+      line=string(7+progname.length(),' ');
+    }
+    line+=addstr;
+  }
+  
+  for (vector<free_parameter>::iterator parm_p=free_arguments.begin();parm_p<free_arguments.end();parm_p++){
+    if (line.length()+parm_p->placeholder.length()>79){
+      result.insert(result.end(),line);
+      line=string(7+progname.length(),' ');
+    }
+    line+=" ["+parm_p->placeholder+"]";
+  }
+  result.insert(result.end(),line);
+  
+  /*******************************/
+
+  vector<string> left,right;
+  for (vector<parameter>::iterator parm_p=arguments.begin();parm_p<arguments.end();parm_p++){
+    line=parm_p->description;
+    string st2=" -"+parm_p->shortname;
+    if (parm_p->target)st2+=" "+parm_p->placeholder;
+    st2+=", --"+parm_p->longname;
+    if (parm_p->target)st2+=parm_p->placeholder;
+    left.insert(left.end(),st2);
+    right.insert(right.end(),line);
+  }
+  
+  for (vector<free_parameter>::iterator parm_p=free_arguments.begin();parm_p<free_arguments.end();parm_p++){
+    string st2;
+    line=parm_p->description;
+    st2+=" "+parm_p->placeholder;
+    left.insert(left.end(),st2);
+    right.insert(right.end(),line);
+  }
+  
+  if (arguments.size()){
+    result.insert(result.end(),"");
+    result.insert(result.end(),"Options:");
+  }
+
+  unsigned int max_width=0;
+  for (unsigned int c=0; c<arguments.size();c++)
+    if(left[c].length()>max_width) max_width=left[c].length();
+  for (unsigned int c=0; c<arguments.size();c++){
+    string nl(max_width,' ');
+    nl.replace(0,left[c].length(),left[c]);
+    nl+="  "+right[c];
+    while (nl.length()>80){ // Too long???
+      int limit=nl.find_last_of(' ',80);
+      printf("limit:%i\n",limit);
+      result.insert(result.end(),nl.substr(0,limit));
+      nl=string(max_width+2,' ')+nl.substr(limit+1);
+    } 
+    result.insert(result.end(),nl);
+  }
+  
+  if (free_arguments.size()){
+    result.insert(result.end(),"");
+    result.insert(result.end(),"Arguments:");
+  }
+
+  max_width=0;
+  for (unsigned int c=arguments.size(); c<arguments.size()+free_arguments.size();c++)
+    if(left[c].length()>max_width) max_width=left[c].length();  
+  for (unsigned int c=arguments.size(); c<arguments.size()+free_arguments.size();c++){
+    string nl(max_width,' ');
+    nl.replace(0,left[c].length(),left[c]);
+    nl+="  "+right[c];
+    
+    while (nl.length()>80){ // Too long???
+      int limit=nl.find_last_of(' ',80);
+      printf("limit:%i\n",limit);
+      result.insert(result.end(),nl.substr(0,limit));
+      nl=string(max_width+2,' ')+nl.substr(limit+1);
+    } 
+
+    result.insert(result.end(),nl);
+  }
+    result.insert(result.end(),"");
+}
+
+/*!
+ *\brief Generate help.
+ *\return A vector containing many helpful strings for the user.
+ */
+vector<string> argument_reader::get_help(){
+  vector<string> result;
+  get_help(result);
+  return result;
+}
+
+
+/**************************************************/
+
+argument_reader::parameter::parameter(string n_shortname, string n_longname,string n_description, int * n_status, 
+				string * n_target, string n_placeholder){
+  shortname=n_shortname;
+  longname=n_longname;
+  description=n_description;
+  status=n_status;
+  target=n_target;
+  placeholder=n_placeholder;
+  if (status) *status=0;
+}
+
+argument_reader::free_parameter::free_parameter( string n_placeholder, string n_description, 
+					   int * n_status, string * n_target){
+  description=n_description;
+  status=n_status;
+  target=n_target;
+  placeholder=n_placeholder;
+  if (status) *status=0;
+}