File: doc2html.c

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/*
 * $Id: doc2html.c,v 1.9 1997/07/22 23:24:19 drd Exp $
 *
 */

/* GNUPLOT - doc2html.c */
/*
 * Copyright (C) 1986 - 1993, 1997   Thomas Williams, Colin Kelley
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted, 
 * provided that the above copyright notice appear in all copies and 
 * that both that copyright notice and this permission notice appear 
 * in supporting documentation.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the modified code.  Modifications are to be distributed 
 * as patches to released version.
 *  
 * This software is provided "as is" without express or implied warranty.
 */
 /*
 * doc2html.c  -- program to convert Gnuplot .DOC format to 
 *        World Wide Web (WWW) HyperText Markup Language (HTML) format
 *
 * Created by Russell Lang from doc2ipf by Roger Fearick from 
 * doc2rtf by M Castro from doc2gih by Thomas Williams.
 * 1994-11-03
 *
 * usage:  doc2html gnuplot.doc gnuplot.htm
 *
 */

/* note that tables must begin in at least the second column to */
/* be formatted correctly and tabs are forbidden */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#ifndef NO_STDLIB_H
#include <stdlib.h>
#endif
#if !defined(NEXT) && !defined(ATARI)
#include <malloc.h>
#endif

#define MAX_LINE_LEN	1024
#define TRUE 1
#define FALSE 0

int debug = FALSE;
char title[256];

#include "ansichek.h"

void convert __PROTO((FILE *, FILE *));
void process_line __PROTO((char *, FILE *));

#include "termdoc.c"
#include "xref.c"

int
main(argc,argv)
int argc;
char **argv;
{
FILE * infile;
FILE * outfile;

    if (argv[argc-1][0]=='-' && argv[argc-1][1]=='d') {
        debug = TRUE;
	argc--;
    }

    if ( (argc > 3) || (argc == 1) ) {
        fprintf(stderr,"Usage: %s infile outfile\n", argv[0]);
#ifndef ALL_TERM
#define ALL_TERM
#endif
#define GOT_DRIVER_H
        return(1);
    }
    if ( (infile = fopen(argv[1],"r")) == (FILE *)NULL) {
        fprintf(stderr,"%s: Can't open %s for reading\n",
            argv[0], argv[1]);
        return(1);
    }
    if (argc == 3) {
      if ( (outfile = fopen(argv[2],"w")) == (FILE *)NULL) {
        fprintf(stderr,"%s: Can't open %s for writing\n",
            argv[0], argv[2]);
      }
      strcpy(title, argv[2]);
    }
    else {
        outfile = stdout;
        strcpy(title, argv[1]);
    }
    strtok(title, ".");	 /* remove type */
    parse(infile);
    convert(infile,outfile);
    return(0);
}

void
convert(a,b)
    FILE *a,*b;
{
    static char line[MAX_LINE_LEN];
    
    /* generate html header */
    fprintf(b,"<HTML>\n");
    fprintf(b,"<HEAD>\n");
    fprintf(b,"<TITLE>%s</TITLE>\n", title);
    fprintf(b,"</HEAD>\n");
    fprintf(b,"<BODY>\n");
    fprintf(b,"<H1>%s</H1><P>\n", title);

    /* process each line of the file */
        while (fgets(line,MAX_LINE_LEN,a)) {
       process_line(line, b);
       }

    /* close final page and generate trailer */
    fprintf(b,"\n<P><HR>Created automatically by doc2html\n");
    fprintf(b,"</BODY>\n");
    fprintf(b,"</HTML>\n");

    list_free();
}

void
process_line(line, b)
    char *line;
    FILE *b;
{
    static int line_count = 0;
    static char line2[MAX_LINE_LEN];
    static int last_line;
    char hyplink1[64] ;
    char *pt, *tablerow ;
    int i;
    int j;
    static int startpage = 1;
    char str[MAX_LINE_LEN];
    char topic[MAX_LINE_LEN];
    int k, l;
    struct LIST *klist;
    static int tabl=0;
    static int para=0;
    static int inquote = FALSE;
    static int inref = FALSE;

    line_count++;

    i = 0;
    j = 0;
    while (line[i] != '\0')
    {
        switch(line[i])
        {
            case '<':
                strcpy( &line2[j], "&lt;" ) ;
                j += strlen( "&lt." ) - 1 ;
                break ;

            case '>':
                strcpy( &line2[j], "&gt;" ) ;
                j += strlen( "&gt." ) - 1 ;
                break ;

            case '&':
                strcpy( &line2[j], "&amp;" ) ;
                j += strlen( "&amp;" ) - 1 ;
                break ;
                                
            case '\r':
            case '\n':
                break;
            case '`':    /* backquotes mean boldface or link */
                if ((!inref) && (!inquote))
                {
                    k=i+1;    /* index into current string */
                    l=0;    /* index into topic string */
                    while ((line[k] != '`') && (line[k] != '\0'))
                    {
                        topic[l] = line[k];
                        k++;
                        l++;
                        }
                    topic[l] = '\0';
                    klist = lookup(topic);
		    if (klist && ((k = klist->line) != last_line))
                    {
                        sprintf( hyplink1, "<A HREF=\042#%d\042>", k ) ;
                        strcpy( line2+j, hyplink1 ) ;
                        j += strlen( hyplink1 )-1 ;
                        
                        inref = k;
                        }
                    else
                    {
                        if (debug && k != last_line)
                            fprintf(stderr,"Can't make link for \042%s\042 on line %d\n",topic,line_count);
                        line2[j++] = '<';
                        line2[j++] = 'B';
                        line2[j] = '>';
                        inquote = TRUE;
                        }
                    }
                else
                {
                    if (inquote && inref)
                        fprintf(stderr, "Warning: Reference Quote conflict line %d\n", line_count);
                    if (inquote)
                    {
                        line2[j++] = '<';
                        line2[j++] = '/';
                        line2[j++] = 'B';
                        line2[j] = '>';
                        inquote = FALSE;
                        }
                    if (inref)
                    {
                        /* must be inref */
                        line2[j++] = '<';
                        line2[j++] = '/';
                        line2[j++] = 'A';
                        line2[j] = '>';
                        inref = 0;
                        }
                }
                break;
            default:
                line2[j] = line[i];
            }
        i++;
        j++;
        line2[j] = '\0';
        }

    i = 1;

    switch(line[0]) {        /* control character */
       case '?': {            /* interactive help entry */
#ifdef FIXLATER
               if( intable ) intablebut = TRUE ;
               fprintf(b,"\n:i1. %s", &(line[1])); /* index entry */
#endif
               break;
       }
       case '@': {            /* start/end table */
          break;            /* ignore */
       }
       case '#': {            /* latex table entry */
          break;            /* ignore */
       }
       case '^': {			/* external link escape */
	 (void) fputs(line+1, b); /* copy directly */
	 break;			/* ignore */
       }
       case '%': {            /* troff table entry */
          break;            /* ignore */
       }
       case '\n':            /* empty text line */
	    if (tabl)
	        fprintf(b,"</PRE>\n"); /* rjl */
            para = 0;
            tabl = 0;
            fprintf(b,"<P>");
            break;
       case ' ': {            /* normal text line */
          if ((line2[1] == '\0') || (line2[1] == '\n'))
          {
                fprintf(b,"<P>"); 
                para = 0;
		tabl = 0;
                }
          if (line2[1] == ' ') 
          {
                if (!tabl)
                {
		    fprintf(b,"<PRE>\n");
                    }
                fprintf(b,"%s\n",&line2[1]); 
                tabl = 1;
                para = 0;
                }
          else
          {
		if (tabl) {
		    fprintf(b,"</PRE>\n"); /* rjl */
                    fprintf(b,"<P>"); 	/* rjl */
		}
                tabl = 0;
                if (!para)
                    para = 1;        /* not in para so start one */
                  fprintf(b,"%s \n",&line2[1]); 
                }
          break;
       }
       default: {
          if (isdigit(line[0])) { /* start of section */
	    if (tabl)
	          fprintf(b,"</PRE>\n"); /* rjl */
            if (startpage) /* use the new level 0 */
            {
                refs(0,b, "<P>\n", "<P>\n", "<A HREF=\042#%d\042>%s</A><BR>\n");
                } 
	    else 
	    {
                refs(last_line,b, "<P>\n", "<P>\n", "<A HREF=\042#%d\042>%s</A><BR>\n");
	        }
            para = 0;                    /* not in a paragraph */
            tabl = 0;
            last_line = line_count;
            startpage = 0;
	    if (debug)
		fprintf( stderr, "%d: %s\n", line_count, &line2[1] ) ;
            klist=lookup(&line2[1]) ;
            if (klist)
                k = klist->line;
            else
                k = -1;
	    /* output unique ID and section title */
            fprintf(b,"<HR><A NAME=\042%d\042>\n<H%c>", line_count, line[0]=='1'?line[0]:line[0]-1);
            fprintf(b,&(line2[1])); /* title */
            fprintf(b,"</H%c>\n<P>", line[0]=='1'?line[0]:line[0]-1) ;
          } else
            fprintf(stderr, "unknown control code '%c' in column 1, line %d\n",
                line[0], line_count);
          break;
       }
    }
}