doc2html.c

GSview 4.6 PostScript previewer。Ghostscript在MS-Windows, OS/2 and Unix下的图形化接口

/*
 * 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
 * Modified by Russell Lang 1996-10-15
 *   obtain title from first line of doc file.
 *   Conform to HTML 3.2. 
 * Modified by Russell Lang 1997-11-28
 *   Convert {bml* file.bmp} to <IMG SRC="file.gif">
 * Modified by Russell Lang 1997-12-18
 *   Convert non-ascii characters to &#nnn;
 * Modified by Russell Lang 2000-06-16
 *   Change A HREF and NAME fields to use the topic title, not line number.
 * Modified by Russell Lang 2001-07-12
 *   Convert tags to lower case.
 *   Convert non-ascii characters in links to &#nnn;
 *   Replace isspace() which doesn't work with c > 127.
 *   Allow charset to be specified.  If charset provided, do not
 *   quote non-ascii characters.  This is to allow use with Greek.
 *
 * 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 */

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>

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

struct LIST
{
	int level;
	int line;
	char *string;
	struct LIST *next;
	};

struct LIST *list = NULL;
struct LIST *head = NULL;

struct LIST *keylist = NULL;
struct LIST *keyhead = NULL;

int debug = FALSE;
int nolinks = FALSE;
char *charset = NULL;

void parse(FILE *a);
int lookup(char *s);
char *title_from_index(int id);
void refs(int l, FILE *f);
void convert(FILE *a,FILE *b);
void process_line(char *line, FILE *b);
void putquoted(char *s, FILE *f);

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

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

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

    if ( (argc > 4) || (argc == 1) ) {
        fprintf(stderr,"Usage: %s infile outfile [charset]\n", argv[0]);
        fprintf(stderr,"charset is ISO-8859-1 for ISO-Latin1, ISO-8859-7 for Greek, UTF-8 for Unicode\n");
        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]);
      }
    }
    else {
        outfile = stdout;
    }

    if (argc >= 4)
	charset = argv[3];

    parse(infile);
    convert(infile,outfile);
    return(0);
}

/* scan the file and build a list of line numbers where particular levels are */
void parse(FILE *a)
{
    static char line[MAX_LINE_LEN];
    char *c;
    int lineno=0;
    int lastline=0;

    /* skip title line */
    fgets(line,MAX_LINE_LEN,a);

    while (fgets(line,MAX_LINE_LEN,a)) 
    {
      lineno++;
      if (isdigit(line[0]))
      {
        if (list == NULL)    
            head = (list = (struct LIST *) malloc(sizeof(struct LIST)));
        else
            list = (list->next = (struct LIST *) malloc(sizeof(struct LIST)));
        list->line = lastline = lineno;
        list->level = line[0] - '0';
        list->string = (char *) malloc (strlen(line)+1);
        c = strtok(&(line[1]),"\n");
        strcpy(list->string, c);
        list->next = NULL;
      }
      if (line[0]=='?')
      {
        if (keylist == NULL)    
            keyhead = (keylist = (struct LIST *) malloc(sizeof(struct LIST)));
        else
            keylist = (keylist->next = (struct LIST *) malloc(sizeof(struct LIST)));
        keylist->line = lastline;
        keylist->level = line[0] - '0';
        c = strtok(&(line[1]),"\n");
        if( c == NULL || *c == '\0' ) c = list->string ;
        keylist->string = (char *) malloc (strlen(c)+1);
        strcpy(keylist->string, c);
        keylist->next = NULL;
      }
    }
    rewind(a);
    }

/* look up an in text reference */
int
lookup(char *s)
{
	char *c;
	char tokstr[MAX_LINE_LEN];

	strcpy(tokstr, s);

	/* first try the ? keyword entries */
	keylist = keyhead;
	while (keylist != NULL)
	{
		c = keylist->string;
		while (*c == ' ') c++;
		if (!strcmp(s, c)) return(keylist->line);
		keylist = keylist->next;
		}

	/* then try titles */
#ifdef GNUPLOT
	match = strtok(tokstr, " \n\t");
	l = 0; /* level */
	
	list = head;
	while (list != NULL)
	{
		c = list->string;
		while (*c == ' ') c++;
		if (!strcmp(match, c)) 
		{
			l = list->level;
			match = strtok(NULL, "\n\t ");
			if (match == NULL)
			{
				return(list->line);
				}
			}
		if (l > list->level)
			break;
		list = list->next;
		}
#else
    /* we list keys explicitly, rather than building them from multiple levels  */
    list = head;
    while (list != NULL)
    {
        c = list->string;
        while (*c == ' ') c++;
        if (!strcmp(s, c)) return(list->line);
        list = list->next;
        }
#endif
	return(-1);
}

char *title_from_index(int id)
{
    struct LIST *l = NULL;
    static char empty[] = "";
    if (id < 0)
	return empty;
    l = head;
    while (l != NULL) {
	if (id == l->line)
	    return l->string;
        l = l->next;
    }
    return NULL;
}

void putquoted(char *s, FILE *f)
{
    unsigned int value;
    unsigned int digit;
    for (; *s; s++) {
	if ((charset==NULL) && (*s & 0x80)) {
	    value = *s & 0xff;
	    fputc('&', f);
	    fputc('#', f);
	    digit = value / 100;
	    value -= digit * 100;
	    fputc('0' + digit, f);
	    digit = value / 10;
	    value -= digit * 10;
	    fputc('0' + digit, f);
	    fputc('0' + value, f);
	}
	else
	    fputc(*s, f);
    }
}

/* search through the list to find any references */
void
refs(int l, FILE *f)
{
    int curlevel;
    char *c;
    int inlist = FALSE;

    /* find current line */
    list = head;
    while (list->line != l)
        list = list->next;
    curlevel = list->level;
    list = list->next;        /* look at next element before going on */
    if (list != NULL)
    {
	inlist = TRUE;
	fprintf(f,"<p>\n");
	}

    while (list != NULL) {
        /* we are onto the next topic so stop */
        if (list->level == curlevel)
            break;
        /* these are the next topics down the list */
        if (list->level == curlevel+1) {
            c = list->string;
	    while (*c == ' ') c++;
	    if (nolinks) {
	        fprintf(f,"<b>\n");
		putquoted(c, f);
	        fprintf(f,"</b><br>\n");
	    }
	    else {
		char *p = c;
	        fprintf(f,"<a href=\042#");
		while (*p) {
		    if (*p == ' ')
			fputc('_', f);
		    else {
			if ((charset == NULL) && (*p & 0x80)) {
			    unsigned int value = *p & 0xff;
			    unsigned int digit;
			    fputc('&', f);
			    fputc('#', f);
			    digit = value / 100;
			    value -= digit * 100;
			    fputc('0' + digit, f);
			    digit = value / 10;
			    value -= digit * 10;
			    fputc('0' + digit, f);
			    fputc('0' + value, f);