/*  
 parse.c of

 2rtf: a facility to convert files in the ATK file format to files compatible with the RTF format.

 Scribetext is copyright (c) 1989, 1990 by the Massachusetts Institute of
 Technology.

 RTF is a product of the Microsoft Corporation.

 Permission to use, copy, modify, and distribute this software and
 its documentation for any purpose and without fee is hereby granted,
 provided that the above copyright notice and the name of the author(s)
 appear in all copies; that both that copyright notice, the name of
 the author(s) and this permission notice appear in supporting
 documentation; and that the name of the Massachusetts Institute of
 Technology not be used in advertising or publicity pertaining to
 distribution of the software without specific, written prior
 permission.  The Massachusetts Institute of Technology makes no
 representations about the suitability of this software for any purpose.
 It is provided "as is" without express or implied warranty.

 2rtf was written by Scott Rixner, rixner@ATHENA.MIT.EDU and Jeremy Paul Kirby, jpkirby@ATHENA.MIT.EDU

 $Header: /afs/cs.cmu.edu/project/atk-dist/auis-6.3/contrib/mit/2rtf/RCS/parse.c,v 1.1 1994/02/02 19:05:34 susan Exp $
*/

/*
	$Disclaimer: 
 * Permission to use, copy, modify, and distribute this software and its 
 * documentation for any purpose is hereby granted without fee, 
 * provided that the above copyright notice appear in all copies and that 
 * both that copyright notice, this permission notice, and the following 
 * disclaimer appear in supporting documentation, and that the names of 
 * IBM, Carnegie Mellon University, and other copyright holders, not be 
 * used in advertising or publicity pertaining to distribution of the software 
 * without specific, written prior permission.
 * 
 * IBM, CARNEGIE MELLON UNIVERSITY, AND THE OTHER COPYRIGHT HOLDERS 
 * DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT 
 * SHALL IBM, CARNEGIE MELLON UNIVERSITY, OR ANY OTHER COPYRIGHT HOLDER 
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 
 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
 * OF THIS SOFTWARE.
 *  $Disclaimer: This software is part of version 5.2.0 of the 
 * Andrew User Interface System and is the 
 * property of IBM, Carnegie Mellon University, 
 * and the other copyright holders.  The source 
 * code of this version is for the sole use of 
 * members of the Andrew Consortium with 
 * memberships extending into calendar year 
 * 1993.  This source code is not to be distributed 
 * to non-members of the consortium nor beyond 
 * a fifty-mile radius from the membership address.  
 * Binary object code compiled or derived from 
 * these sources is not to be distributed to non-
 * members.  Members may have additional 
 * distribution rights granted by prior written 
 * permission of Carnegie Mellon University.
 * 
 * IBM, CARNEGIE MELLON UNIVERSITY, 
 * AND THE OTHER COPYRIGHT HOLDERS
 *  DISCLAIM ALL WARRANTIES WITH 
 * REGARD TO THIS SOFTWARE, INCLUDING 
 * ALL IMPLIED WARRANTIES OF MERCHANT-
 * ABILITY AND FITNESS. IN 
 * NO EVENT SHALL  IBM, CARNEGIE 
 * MELLON UNIVERSITY, OR ANY OTHER 
 * COPYRIGHT HOLDER BE LIABLE FOR 
 * ANY SPECIAL, INDIRECT OR CONSE-
 * QUENTIAL DAMAGES OR ANY DAMAGES 
 * WHATSOEVER RESULTING FROM LOSS OF
 * USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT 
 * OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *  $
 *  $
*/

#ifndef NORCSID
#define NORCSID
static char rcsid[]="$Header: /afs/cs.cmu.edu/project/atk-dist/auis-6.3/contrib/mit/2rtf/RCS/parse.c,v 1.1 1994/02/02 19:05:34 susan Exp $";
#endif


#include <stdio.h>
#include <ctype.h>
#include "2rtf.h"
#include "input.h"

extern struct TableStruct *Table;
extern struct StyleStackStruct *Style;

void CloseFiles(), AbsorbSpace();
long int ParseText();


void ParseMain(Filein, Fileout)
     char *Filein, *Fileout;
/*
 *
 *  Handle standard beginning to all rtf files.  Make main
 *  call to ParseText(), Close files when done.  Print
 *  useful messages to users.
 *
 */
{
  CurrLine=1;

  fprintf(fout, "{\\rtf%d\\mac\\deff%d ", RTFVersion, NEW_YORK);

  /* font table - standard */

  fprintf(fout, "{\\fonttbl");
  fprintf(fout, "{\\f%d\\fswiss Chicago;}", CHICAGO);
  fprintf(fout, "{\\f%d\\froman New York;}", NEW_YORK);
  fprintf(fout, "{\\f%d\\fmodern Monaco;}", MONACO);
  fprintf(fout, "{\\f%d\\ftech Symbol;}", SYMBOL);
  fprintf(fout, "}");

  /* color table - may be omitted */

  fputs("\\ftnbj\\sectd\n", fout);
  fputs("\\linemod0\\linex0\\cols1\\endnhere ", fout);
  fputs("\\pard\\plain ", fout);

  printf("* Processing manuscript file %s\n", Filein);
  printf("* Translating to %s\n\n", Fileout);

  ParseText(EOF, NORMAL, PRINTTOFILE);
  CloseFiles();
  printf("* Finished processing %ld lines of %s.\n", CurrLine, Filein);
}


long int ParseText(tofind, transform, action)
     int tofind, transform, action;
/*
 *
 *  tofind:     used to tell when this recursion of
 *              ParseText should fall back.
 *  transform:  used to check if individual characters
 *              should be transformed into anything.
 *              i.e. change to all caps
 *  action:     if set to PRINTTOFILE (0), normal
 *              parsing occurs.  Presently the only
 *              other option is NOP, which causes
 *              everything to be passed over until
 *              tofind is encountered, at which point
 *              it falls back.
 *
 */
{
   char ch, instruction[TMP_SIZE], tmp_instruction[TMP_SIZE], *GetInstruction(), *makelower();
   struct TableStruct *tmp, *FindNode();
   struct StyleStackStruct *stytmp;
   int Execute(), ReplaceText(), in;

   while((in = fgetc(fin)) != tofind)
   {
      ch = (char) in;
      if(paragraph && ch != '\\')
         paragraph = 0;
      if(ch == '\\')
      {
         ch = (char) fgetc(fin);
	 if((ch == '\\' || ch == '{' || ch == '}') && (!action))
            fprintf(fout, "\\%c", ch);
         else if(isspace(ch))
            continue;
	 else
	 {
	    ungetc(ch, fin);
	    strcpy(tmp_instruction, GetInstruction());
	    strcpy(tmp_instruction, makelower(tmp_instruction));
	    tmp = FindNode(EZCOLUMN, tmp_instruction);
	    if(tmp == NULL && (!action))
	    {
               /* Check if command is in stylesheet before
                  declaring an error. */

               stytmp = Style;
               while(stytmp != NULL)
               {
                  if(!strcmp(tmp_instruction, stytmp->name))
                     break;
                  stytmp = stytmp->next;
	       }

               if(stytmp == NULL)
               {
		 /* Because we don't interpret templates, we may find one of
		  * these.  Signal an error, and insert the command as a
		  * style annotation. */
       	         fprintf(ferr, "* EZ command %s not recognized\n",
			 tmp_instruction);
		 fprintf(fout, "{{\\v STYLE: %s}", tmp_instruction);

		 ch = ' ';
		 while(ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')
		 {
		     ch = (char) fgetc(fin);
		     if(ch=='\n' || ch=='\r')
			 Newlines();
		 }

		 if(ch != '{')
		     ungetc(ch, fin);
   
		 ParseText('}', NORMAL, PRINTTOFILE);
		 putc('}', fout);
	       }
               else
               {
                  RStyleApply(stytmp);
	       }
            }
	    else if(tmp != NULL && !action)
               if(Execute(tmp_instruction, transform) == tofind)
	          break;
	 }
      }   
      else if(ch == '\r' || ch == '\n')
         Newlines();
      else if(ch == '\t')
         fputs("\\tab ", fout);
      else if(!action)
      {
         if(!transform)
            fputc(ch, fout);
         else if(transform == INDEX && ch == '+')
         {
            ch = (char) fgetc(fin);
            if(ch == '+')
	       fputs("\\:", fout);
            else
            {
               ungetc(ch, fin);
               fputs("+", fout);
	    }
         }
         else if(transform == HEADER && ch == '$')
         {
            ch = (char) fgetc(fin);
            if(ch == '$')
               fputs("$", fout);
            else
            {
		sprintf(tmp_instruction, "$");
		while(isalpha(ch))
		{
		    sprintf(tmp_instruction, "%s%c", tmp_instruction, ch);
		    ch = (char) fgetc(fin);
		}
		ungetc(ch, fin);
                strcpy(tmp_instruction, makelower(tmp_instruction));
	        tmp = FindNode(EZCOLUMN, tmp_instruction);
                if(tmp != NULL)
                {
                   if(!(tmp->mode & COMMAND))
                      fprintf(fout, "\\%s ", tmp->rtf.word);
                   else
                      tmp->rtf.fun(tmp_instruction, transform, tofind);
		}
                else
                   fputs(tmp_instruction, fout);
	    }
	 }
	 else if(transform == LOWERCASE && isupper(ch))
	    fputc(tolower(ch), fout);
	 else if(transform == CAPS && islower(ch))
	    fputc(toupper(ch), fout);
	 else
	    fputc(ch, fout);
      }	
   }
  
   if(tofind == EOF)
      return(CurrLine++);
/*   else if(tofind < 256)
   {
      ch = (char) fgetc(fin);
      if(ch != '\n' && ch != '\r')
	 ungetc(ch, fin);
      else
         Newlines();
   }*/

   return(CurrLine);
}


struct TableStruct *FindNode(field, string)
     int field;
     char *string;
/*
 *
 *  Look up string in internal translation table.
 *
 */
{
  struct TableStruct *tmp=Table;

  if(field == EZCOLUMN)
    {
      while(tmp != NULL)
	{
	  if(!strcmp(tmp->ezword, string))
	    return(tmp);
	  else
	    tmp = tmp->next;
	}
      return(NULL);
    }
  
  if(field == RTFCOLUMN)
    {
      while(tmp != NULL)
	{
	  if(!strcmp(tmp->rtf.word, string))
	    return(tmp);
	  else
	    tmp = tmp->next;
	}
      return(NULL);    
    }

  printf("* Unknown error!\n* %s:debug  Invalid mode sent to FindNode().\n", me);
  exit(0);
}

char *GetInstruction()
/*
 *
 *  Read in commands that occur after "\".
 *
 */
{
  char character, *instruction;
  int in, n;

  instruction = (char *) calloc (TMP_SIZE, sizeof(char));

  while((in = fgetc(fin)) != EOF)
    {
      character = (char) in;
      if(character == '{' || character == '\\')
      {
        ungetc(character, fin);
        return(instruction);
      }
      else if(character == ' ' || character == '\t')
        return(instruction);
      else if(character == '\n' || character == '\r')
      {
        Newlines();
	return(instruction);
      }
      else
	sprintf(instruction, "%s%c", instruction, character);
    }
  
  fprintf(ferr, "* Error:\n* %s: %s\n%s  ", me,
	  "Failure to find instruction after '@' character detected...",
	  "End of file reached.");
  
  CloseFiles();
}


int Execute(instruction, transform)
     char *instruction;
     int transform;
/*
 *
 *  Handle instruction read by GetInstruction() accordingly.
 *
 */
{
  struct TableStruct *tmp;
  char ch, close;

  tmp = FindNode(EZCOLUMN, instruction);

  if(tmp->mode & QUOTEDCHAR)
    fputc(tmp->rtf.quote, fout);
  else if(tmp->mode & NAKED)
    {
      if(!(tmp->mode & COMMAND))
	ReplaceText(tmp->rtf.word, tmp->mode, transform, ' ');
      else
	return(tmp->rtf.fun(instruction, transform, ' '));
    }
  else
    {
      ch = ' ';
      while(ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')
	{
	  ch = (char) fgetc(fin);
	  if(ch=='\n' || ch=='\r')
	    Newlines();
	}
      
      if(ch == '{')
	 if(!(tmp->mode & COMMAND))
	    ReplaceText(tmp->rtf.word, tmp->mode, transform, '}');
	 else
	    return(tmp->rtf.fun(instruction, transform, '}'));
      else
	{
	  fprintf(ferr, "* Fatal error:\n* %s: Lack of parameters for command %s\n%s", me,
		  tmp->ezword, "Program terminating");
	  exit(0);
	}
    }
  return CONTINUE;
}


int ReplaceText(instruction, mode, transform, tofind)
     char *instruction, tofind;
     int mode, transform;
/*
 *
 *  Make simple replacement of text if ezword was not
 *  mapped to a command in the transtable.
 *
 */
{
  if(mode & NAKED)
     fprintf(fout, "\n\\%s ", instruction);
  else
  {
     fprintf(fout, "{\\%s ", instruction);

     ParseText(tofind, transform, PRINTTOFILE);

     fputc('}', fout);
  }
}