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Old 09-23-2014, 08:39 AM   #121
des_a
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It is one line that's off too. I was trying to change that one line in this file, and fix that case. I don't "think" I can do it from within the bison syntax, because it is not smart enough to do conditional actions, such as execute this action if the code is in this form, execute the other action if the code is in that form, which would generate two different code generation cases. I need the whole if, so I cannot test from within the action itself. Therefore this helper function was written to transform the code.
 
Old 09-25-2014, 07:13 PM   #122
des_a
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I just got this code debugged. Here is the code:

Code:
void generate_if_line_numbers()
{
 /*
  1. Test if the if is just an if statement.
  2. If it is just an if, change end_1 to iffalse_or_end_1.
  3. Test if the if is an if else ladder with one if-else.
  4. If step 3 is true, change end_2 to end_1.
 */
 bool iffound = false, ifendfound = false;
 String rstring = "\"iffalse_or_end_1\"\n";
 string modstring = "";
 String modstring2 = "";
 Array<String> modstrings;
 bool changed = false;
 ASTNode node;
 unsigned long len = tree.nodenumber();
 unsigned long changedindex = 0;


 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :1");
   if (index != string::npos)
    iffound = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("End if :1");
   if (index != string::npos)
    ifendfound = true;
  }
 }

 if (iffound == true && ifendfound == false)
 {  
  for (unsigned long i = 0; i < len; ++i)
  {
   node.setNode(tree.getNode(i));
   String nodename = node.getName();

   if (nodename == "if_statementp3")
   {
    for (unsigned long j = 0; j < node.getValue().length(); ++j)
    {
     int index = node.getValue()[j].getString().find("\"end_1\"");
     if (index != string::npos)
     {
      modstring = node.getValue()[j].getString();
      modstring.erase(index);
      modstring.insert(index, rstring.getString().c_str());
      modstring2 = modstring;
      changed = true;
      changedindex = j;
      break;
     }
    }
   }
  }
 }

 if (changed == true)
 {
  for (unsigned long i = 0; i < node.getValue().length(); ++i)
  {
   if (i != 0)
    modstrings.insert();

   if (i != changedindex)
    modstrings[i] = node.getValue()[i];
   else
    modstrings[i] = modstring2;
  }
  node.setValue(modstrings);
  tree.setNode("if_statementp3", node);

  for (unsigned long i = out.length() - 1; i > 0; --i)
  {
   out.remove();
   --outcount;
  }
  generate_pcode(false);
 }
}
So the problem was that I was previously setting a copy of the string, and not the string which will be used. Now I have to check my other examples.
 
Old 09-25-2014, 07:51 PM   #123
des_a
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There is another example that doesn't work, and there are two lines in it. I am hot on the track of fixing that now. Then I will test again to see if I missed any examples...
 
Old 09-26-2014, 09:01 PM   #124
des_a
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Posts: 1,426

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So now the code is working for the first case, but for the second it's not working. The first problem is that the code is adding extra code and is changing labels names. Here is the generated output:

Code:
VERSION TVOID 0V


; Begin if :1
ALOAD TBOOLEAN false
CGOTOL TSTRING "iftrue_1"
GOTOL TSTRING "iffalse_or_end_1"


LBL TSTRING "iftrue_1"
VOID TVOID 0V
; End if code :1
GOTOL TSTRING "end_1"


LBL TSTRING "iffalse_or_end_1"
; Begin if :2
ALOAD TBOOLEAN false
CGOTOL TSTRING "iftrue_2"
GOTOL TSTRING "iffalse_or_end_2"


LBL TSTRING "iftrue_2"
VOID TVOID 0V
GOTOL TSTRING "end_1"


LBL TSTRING "end_1"
; End if :1
GOTOL TSTRING "end_1"
; End if or else code :1
GOTOL TSTRING "end_1"


LBL TSTRING "end_1"
; End if :1

END TVOID 0V
The code that generates this output is:

Code:
void generate_if_line_numbers()
{
 /*
  1. Test if the if is just an if statement.
  2. If it is just an if, change end_1 to iffalse_or_end_1.
  3. Test if the if is an if else ladder with one if-else.
  4. If step 3 is true, change end_2 to end_1.
  5. If step 3 is true, change iffalse_or_end_2 to end_2.
 */
 bool iffound = false, ifendfound = false, if2found = false, if2endfound = false, if3found = false;
 String rstring = "";
 string modstring = "";
 String modstring2 = "";
 Array<String> modstrings;
 bool changed = false;
 ASTNode node;
 unsigned long len = tree.nodenumber();
 unsigned long changedindex = 0;

 // Step 1
 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :1");
   if (index != string::npos)
    iffound = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("End if :1");
   if (index != string::npos)
    ifendfound = true;
  }
 }

 // Step 2
 rstring = "\"iffalse_or_end_1\"\n";
 if (iffound == true && ifendfound == false && if2found == false && if2endfound == false && if3found == false)
 {  
  for (unsigned long i = 0; i < len; ++i)
  {
   node.setNode(tree.getNode(i));
   String nodename = node.getName();

   if (nodename == (String)("if_statementp3_1"))
   {
    for (unsigned long j = 0; j < node.getValue().length(); ++j)
    {
     int index = node.getValue()[j].getString().find("\"end_1\"");
     if (index != string::npos)
     {
      modstring = node.getValue()[j].getString();
      modstring.erase(index);
      modstring.insert(index, rstring.getString().c_str());
      modstring2 = modstring;
      changed = true;
      changedindex = index;
      break;
     }
    }
   }
  }
 }

 if (changed == true)
 {
  for (unsigned long i = 0; i < node.getValue().length(); ++i)
  {
   if (i != 0)
    modstrings.insert();

   if (i != changedindex)
    modstrings[i] = node.getValue()[i];
   else
    modstrings[i] = modstring2;
  }
  node.setValue(modstrings);
  tree.setNode((String)("if_statementp3_1"), node);

  for (unsigned long i = out.length() - 1; i > 0; --i)
  {
   out.remove();
   --outcount;
  }
 }


 // Step 3
 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :2");
   if (index != string::npos)
    if2found = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("End if :2");
   if (index != string::npos)
    if2endfound = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :3");
   if (index != string::npos)
    if3found = true;
  }
 }


 // Step 4
 rstring = "\"end_1\"\n";
 if (iffound == true && ifendfound == true && if2found == true && if2endfound == false && if3found == false)
 {
  for (unsigned long i = 0; i < len; ++i)
  {
   node.setNode(tree.getNode(i));
   String nodename = node.getName();

   if (nodename == (String)("if_statementp3_2"))
   {
    for (unsigned long j = 0; j < node.getValue().length(); ++j)
    {
     int index = node.getValue()[j].getString().find("\"end_2\"");
     if (index != string::npos)
     {
      modstring = node.getValue()[j].getString();
      modstring.erase(index);
      modstring.insert(index, rstring.getString().c_str());
      modstring2 = modstring;
      changed = true;
      changedindex = index;
      cout << modstring2 << endl;
      break;
     }
    }
   }
  }
 }

 if (changed == true)
 {
  for (unsigned long i = 0; i < node.getValue().length(); ++i)
  {
   if (i != 0)
    modstrings.insert();

   if (i != changedindex)
    modstrings[i] = node.getValue()[i];
   else
    modstrings[i] = modstring2;
  }
  node.setValue(modstrings);
  tree.setNode((String)("if_statementp3_2"), node);

  for (unsigned long i = out.length() - 1; i > 0; --i)
  {
   out.remove();
   --outcount;
  }
 }

 // Step 5
 /*
 rstring = "\"iffalse_or_end_2\"\n";
 if (iffound == true && ifendfound == true && if2found == true && if2endfound == false && if3found == false)
 {
  for (unsigned long i = 0; i < len; ++i)
  {
   node.setNode(tree.getNode(i));
   String nodename = node.getName();

   if (nodename == (String)("if_statementp3_" + ifcounter))
   {
    for (unsigned long j = 0; j < node.getValue().length(); ++j)
    {
     int index = node.getValue()[j].getString().find("\"end_2\"");
     if (index != string::npos)
     {
      modstring = node.getValue()[j].getString();
      modstring.erase(index);
      modstring.insert(index, rstring.getString().c_str());
      modstring2 = modstring;
      changed = true;
      changedindex = j;
      break;
     }
    }
   }
  }
 }

 if (changed == true)
 {
  for (unsigned long i = 0; i < node.getValue().length(); ++i)
  {
   if (i != 0)
    modstrings.insert();

   if (i != changedindex)
    modstrings[i] = node.getValue()[i];
   else
    modstrings[i] = modstring2;
  }
  node.setValue(modstrings);
  tree.setNode((String)("if_statementp3_" + ifcounter), node);

  for (unsigned long i = out.length() - 1; i > 0; --i)
  {
   out.remove();
   --outcount;
  }
 }*/

 if (changed == true)
  generate_pcode(false);
}
The problem is in step #4.
 
Old 09-26-2014, 09:02 PM   #125
des_a
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Registered: Sep 2006
Posts: 1,426

Original Poster
Blog Entries: 43

Rep: Reputation: 36
I am puzzled, because this should be the same code I used to change the line in the first case. The first case works, but not the second.

---------- Post added 09-26-14 at 07:03 PM ----------

What am I overlooking?
Last edited by des_a; 09-26-2014 at 09:03 PM. Reason: Posted too soon.
 
Old 10-19-2014, 09:42 PM   #126
des_a
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Registered: Sep 2006
Posts: 1,426

Original Poster
Blog Entries: 43

Rep: Reputation: 36
Still working on looking it over...
 
Old 11-13-2014, 09:23 AM   #127
des_a
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Blog Entries: 43

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I had some other projects to work on before continuing this project.
 
Old 03-14-2015, 10:08 PM   #128
des_a
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I worked on this again, and with some output statements, I think I got it worked out. Here is my algorithm for modifying the code:


Code:
void generate_if_line_numbers()
{
 /*
  1. Test if the if is just an if statement.
  2. If it is just an if, change end_1 to iffalse_or_end_1.
  3. Test if the if is an if else ladder with one if-else.
  4. If step 3 is true, change end_2 to end_1.
 */
 bool iffound = false, ifendfound = false, if2found = false, if2endfound = false, if3found = false;
 String rstring = "";
 string modstring = "";
 String modstring2 = "";
 Array<String> modstrings;
 bool changed = false;
 ASTNode node;
 unsigned long len = tree.nodenumber();
 unsigned long changedindex = 0;

 // Step 1
 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :1");
   if (index != string::npos)
    iffound = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("End if :1");
   if (index != string::npos)
    ifendfound = true;
  }
 }

 // Step 2
 rstring = "\"iffalse_or_end_1\"\n";
 if (iffound == true && ifendfound == false && if2found == false && if2endfound == false && if3found == false)
 {  
  for (unsigned long i = 0; i < len; ++i)
  {
   node.setNode(tree.getNode(i));
   String nodename = node.getName();

   if (nodename == (String)("if_statementp3_1"))
   {
    for (unsigned long j = 0; j < node.getValue().length(); ++j)
    {
     int index = node.getValue()[j].getString().find("\"end_1\"");
     if (index != string::npos)
     {
      modstring = node.getValue()[j].getString();
      modstring.erase(index);
      modstring.insert(index, rstring.getString().c_str());
      modstring2 = modstring;
      changed = true;
      changedindex = index;
      break;
     }
    }
   }
  }
 }

 if (changed == true)
 {
  for (unsigned long i = 0; i < node.getValue().length(); ++i)
  {
   if (i != 0)
    modstrings.insert();

   if (i != changedindex)
    modstrings[i] = node.getValue()[i];
   else
    modstrings[i] = modstring2;
  }
  node.setValue(modstrings);
  tree.setNode((String)("if_statementp3_1"), node);

  for (unsigned long i = out.length() - 1; i > 0; --i)
  {
   out.remove();
   --outcount;
  }
 }


 // Step 3
 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :2");
   if (index != string::npos)
    if2found = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("End if :2");
   if (index != string::npos)
    if2endfound = true;
  }
 }

 for (unsigned long i = 0; i < out.length(); ++i)
 {
  String line = out[i];
  if (line[0] == ';')
  {
   int index = line.getString().find("Begin if :3");
   if (index != string::npos)
    if3found = true;
  }
 }


 // Step 4
 unsigned long nodenumber = 0;
 rstring = "GOTOL TSTRING \"end_1\"\n";
 if (iffound == true && ifendfound == true && if2found == true && if2endfound == false && if3found == false)
 {
  for (unsigned long i = 0; i < len; ++i)
  {
   node.setNode(tree.getNode(i));
   String nodename = node.getName();

   if (nodename == (String)("if_statementp3_2"))
   {
    nodenumber = i;

    for (unsigned long j = 0; j < node.getValue().length(); ++j)
    {
     int index = node.getValue()[j].getString().find("GOTOL TSTRING \"end_2\"\n");
     if (index != string::npos)
     {
      changedindex = j;
      modstring = node.getValue()[j].getString();
      modstring.erase(index);
      modstring.insert(index, rstring.getString().c_str());
      modstring2 = modstring;
      changed = true;
      break;
     }
    }
   }
  }
 }

 if (changed == true)
 {
  node.setNode(tree.getNode(nodenumber));

  for (unsigned long i = 0; i < node.getValue().length(); ++i)
  {
   if (i != 0)
    modstrings.insert();

   if (i != changedindex)
    modstrings[i] = node.getValue()[i];
   else
    modstrings[i] = modstring2;
  }
  node.setValue(modstrings);
  tree.setNode(nodenumber, node);

  for (unsigned long i = out.length() - 1; i > 0; --i)
  {
   out.remove();
   --outcount;
  }
 }

 if (changed == true)
  generate_pcode(false);
}
 
  


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