/*
 *  REFS.C
 *
 *  Bringup a cross reference editor window.  The file S:dme.refs and
 *  dme.refs in the current directory are searched for the reference.
 *  If found, the file specified is searched and the segment specified
 *  loaded as a new file in a new window.
 */

#include "defs.h"

Prototype void do_addpath (void);
Prototype void do_rempath (void);
Prototype void do_ctags (void);
Prototype void do_refs (void);
Prototype int searchref (char *, char *, char **, char **, int *, char **);
Prototype int dirpart (char *);


Prototype MLIST PBase;

typedef struct _PEN {
    MNODE   Node;
    char   *path;
}	PEN;

MLIST	PBase;			/*  special XDME paths	 */

/*
 *  Special XDME paths for REF and CTAGS
 */

#ifndef NO_DO2

void	do_addpath ()
{
    PEN    *pen;
    short   len = strlen (av[1]);

    for (pen = (PEN *) PBase.mlh_Head; pen->Node.mln_Succ; pen = (PEN *) pen->Node.mln_Succ) {
	if (strcmp (av[1], pen->path) == 0)
	    return;
    }
    if (pen = malloc (sizeof (PEN) + len + 2)) {
	pen->path = (char *) (pen + 1);
	strcpy (pen->path, av[1]);
	switch (pen->path[len - 1]) {
	    case ':':
	    case '/':
		break;
	    default:
		strcat (pen->path, "/");
	}
    }
    AddTail ((LIST *) & PBase, (NODE *) pen);
}

void	do_rempath ()
{
    PEN    *pen,
	   *npen;

    for (pen = (PEN *) PBase.mlh_Head; npen = (PEN *) pen->Node.mln_Succ; pen = npen) {
	if (WildCmp (av[1], pen->path)) {
	    Remove ((NODE *) pen);
	    free (pen);
	}
    }
}

#endif

#ifndef NO_DO_CTAGS

/*
 *  Implement ctags
 */

void do_ctags (void)
{
    char    str[64];
    char    path[128];
    char    buf[128];
    char    sbuf[128];
    short   xlen;
    short   slen;
    short   dbaselen;
    BPTR    oldlock = CurrentDir ((BPTR) Ep->dirlock);
    ED	   *ed;

    {
	short	i,
		j;

	for (i = Ep->Column; Current[i] == ' '; ++i);
	for (j = i;; ++j) {
	    short   c = Current[j];

	    if (isalnum (c) || (c == '_'))
		continue;
	    break;
	}
	j -= i;
	if (j > 63)
	    j = 63;
	movmem (Current + i, str, j);
	str[j] = 0;
	xlen = j;
    }
    if (!Ep->iconmode)
	title ("search tags");
    {
	FILE   *fi;
	PEN    *pen,
	       *npen;
	long	i;
	short	j,
		len;

	dbaselen = dirpart (Ep->Name);
	movmem (Ep->Name, path, dbaselen);
	strcpy (path + dbaselen, "tags");

	/*
	 *  Note: pen not used first pass and set to list head, so next
	 *  pass it will be the first element.
	 *
	 *  Note2:  The file path depends on several factors.  (1) tags in
	 *	    'current' directory, use path to name of current window.
	 *	    (2) tags in directory in XDME special path, use special
	 *	    path.  (3) tag entry is a full path name, override
	 *	    previous directories.
	 */

	for (pen = (PEN *) & PBase; npen = (PEN *) pen->Node.mln_Succ; pen = npen) {
	    mountrequest (0);
	    if (fi = fopen (path, "r")) {
		mountrequest (1);
		while ((len = xefgets (fi, buf, 128)) >= 0) {
		    for (j = 0; buf[j] && buf[j] != ' '; ++j);
		    if (j == 0 || buf[0] == '#')
			continue;
		    if (j == xlen && strncmp (str, buf, j) == 0) {
			while (buf[j] == ' ')
			    ++j;
			/*
			 *  Extract the file name into str.  If the
			 *  filename does not contain an absolute path,
			 *  prepend it with such.
			 */
			{
			    char    prep = 1;

			    for (i = 0; buf[j] && buf[j] != ' '; ++i, ++j) {
				str[i] = buf[j];
				if (str[i] == ':')
				    prep = 0;
			    }
			    if (prep) {
				movmem (str, str + dbaselen, i);
				movmem (path, str, dbaselen);
				i += dbaselen;
			    }
			}
			str[i] = 0;

			while (buf[j] && buf[j] != '^') /*  SEARCH ARG */
			    ++j;
			fclose (fi);
			if (buf[j] != '^') {
			    error ("ctags:\nError in tags-file");
			    goto done;
			}
			++j;	/* Skip ^ */

			/* UN*X FIX: Dme works for Aztec ctags, which has the format:	*/
			/*	<tag>	<file>	/^<pattern>				*/
			/* However, ctags under UN*X has the following format:		*/
			/*	<tag>	<file>	/^<pattern>[$]/ 			*/
			/* We just ignore the '$' and '/' so that both foramts work     */
			/* Thomas Rolfs 27/3/91 					*/

			{
			    short   i = 0;

			    while (buf[j] && buf[j] != '$' && buf[j] != '/') {
				sbuf[i++] = buf[j++];
			    }
			    sbuf[i] = 0;
			}

			/* End of fix.	*/

			slen = strlen (sbuf);
			if ((ed = finded (str, 0)) == NULL) {
			    strcpy (buf, "newwindow newfile ");
			    strcat (buf, str);
			    do_command (buf);
			    ed = finded (str, 0);
			} else {
			    WindowToFront (ed->Win);
			    ActivateWindow (ed->Win);
			}
			if (ed == NULL) {
			    error ("ctags:\nunable to load file\n`%s'", str);
			    goto done;
			}
			text_switch (ed->Win);
			text_cursor (0);
			for (i = 0; i < ed->Lines; ++i) {
			    if (strncmp (ed->List[i], sbuf, slen) == 0)
				break;
			}
			sprintf (buf, "first goto %ld", i + 1);
			do_command (buf);
			goto done;
		    }
		}
		fclose (fi);
	    } else {
		mountrequest (1);
	    }
	    if (npen->Node.mln_Succ) {
		strcpy (path, npen->path);
		strcat (path, "tags");
		dbaselen = strlen (npen->path);
	    }
	}
	error ("ctags:\ntag `%s'\nnot found", str);
    }
  done:
    CurrentDir (oldlock);
} /* do_ctags */

#endif


#ifndef NO_DO_REFS

/*
 *  Implement references
 */

void do_refs ()
{
    static char str[MAXLINELEN];
    static char tmprfile[128];
    static char path[128];
    char   *srch;
    char   *file;
    char   *estr;
    long    len;
    int     bcnt = 10;
    short   i,
	    j;
    short   slen,
	    elen;
    FILE   *fi,
	   *fj;
    short   tmph,
	    tmpw;
    BPTR    oldlock = CurrentDir ((BPTR) Ep->dirlock);

    for (i = Ep->Column; Current[i] == ' '; ++i);       /*  skip spaces     */

    {
	char	c;

	for (j = 0; c = Current[i]; ++i, ++j) {
	    if (j == sizeof (str) - 1)
		break;
	    str[j] = c;
	    if (isalnum (c) || c == '_')
		continue;
	    break;
	}
	str[j] = 0;
	strcpy (tmprfile, "t:ref_");
	strncat (tmprfile, str, sizeof (tmprfile) - 32);
    }

    title ("search .refs");

    {
	PEN    *pen;
	PEN    *npen;

	strcpy (path, "dme.refs");      /*  warning, am assuming 8 char name */
	mountrequest (0);
	for (pen = (PEN *) & PBase; npen = (PEN *) pen->Node.mln_Succ; pen = npen) {
	    if (searchref (path, str, &srch, &file, &len, &estr)) {
		mountrequest (1);
		goto found;
	    }
	    if (npen->Node.mln_Succ) {
		strcpy (path, npen->path);
		strcat (path, "dme.refs");
	    }
	}
	error ("refs:\nReference `%s'\nnot found", str);
	mountrequest (1);
	goto done;
    }
  found:
    title ("search file");
    slen = strlen (srch);
    if (estr)
	elen = strlen (estr);

    fi = fopen (file, "r");
    if (fi == NULL) {           /*  try using path prefix   */
	strcpy (str, path);
	strcpy (str + strlen (str) - 8, file);
	fi = fopen (str, "r");
    }
    if (fi) {
	short	lenstr;

	if (srch[0] == '@' && srch[1] == '@') {
	    fseek (fi, atoi (srch + 2), 0);
	    if ((lenstr = xefgets (fi, str, MAXLINELEN)) >= 0)
		goto autoseek;
	}
	while ((lenstr = xefgets (fi, str, MAXLINELEN)) >= 0) {
	    if (strncmp (str, srch, slen) == 0) {
	      autoseek:
		title ("load..");
		if (fj = fopen (tmprfile, "w")) {
		    tmph = 0;
		    tmpw = 0;
		    do {
			if (lenstr > tmpw)
			    tmpw = strlen (str);
			++tmph;
			fputs (str, fj);
			fputc ('\n', fj);
			if (estr && strncmp (str, estr, elen) == 0)
			    break;
			--len;
		    }
		    while ((lenstr = xefgets (fi, str, MAXLINELEN)) >= 0 && len);
		    fclose (fj);
		    if (tmph > 10)
			tmph = 10;
		    if (tmpw > 80)
			tmpw = 80;
		    sprintf (str, "openwindow +0+0+%d+%d newfile %s", (tmpw << 3) + 24, (tmph << 3) + 24, tmprfile);
		    do_command (str);
		    unlink (tmprfile);
		} else {
		    error ("refs:\nUnable to open\n`%s'\nfor write", tmprfile);
		}
		fclose (fi);
		free (srch);
		free (file);
		if (estr)
		    free (estr);
		goto done;
	    }
	    if (--bcnt == 0) {  /* check break every so so  */
		bcnt = 50;
		if (breakcheck ())
		    break;
	    }
	}
	fclose (fi);
	error ("refs:\nSearch for `%s'\nfailed", str);
    } else {
	error ("refs:\nUnable to open\nsub document");
    }
    free (srch);
    free (file);
    if (estr)
	free (estr);
  done:
    CurrentDir (oldlock);
} /* do_refs */


/*
 *  Reference file format:
 *
 *  `key' `lines' `file' `searchstring'
 *
 *  where `lines' can be a string instead ... like a read-until, otherwise
 *  the number of lines to read from the reference.
 */

int	searchref (char *file, char *find, char **psstr, char **pfile, int *plines, char **pestr)
{
    FILE   *fi;
    char    buf[MAXLINELEN];
    char   *ptr,
	   *base;
    char   *b1,
	   *b2,
	   *b3,
	   *b4;
    char    quoted;

    /*short findlen = strlen(find); TODO */

    if (fi = fopen (file, "r")) {
	while (xefgets (fi, (base = buf), MAXLINELEN) >= 0) {
	    if (buf[0] == '#')
		continue;
	    ptr = breakout (&base, &quoted, &b1);
	    /* TODO	  if (ptr && *ptr && strncmp(ptr, find, findlen) == 0) { */
	    if (ptr && *ptr && strcmp (ptr, find) == 0) {
		if (ptr = breakout (&base, &quoted, &b2)) {
		    *pestr = NULL;
		    *plines = atoi (ptr);
		    if (*plines == 0) {
			*pestr = (char *) malloc (strlen (ptr) + 1);
			strcpy (*pestr, ptr);
		    }
		    if (ptr = breakout (&base, &quoted, &b3)) {
			*pfile = (char *) malloc (strlen (ptr) + 1);
			strcpy (*pfile, ptr);
			if (ptr = breakout (&base, &quoted, &b4)) {
			    *psstr = (char *) malloc (strlen (ptr) + 1);
			    strcpy (*psstr, ptr);
			    fclose (fi);
			    if (b1)
				free (b1);
			    if (b2)
				free (b2);
			    if (b3)
				free (b3);
			    if (b4)
				free (b4);
			    return (1);
			}
			free (*pfile);
			if (b4)
			    free (b4);
		    }
		    if (pestr)
			free (*pestr);
		    if (b3)
			free (b3);
		}
		if (b2)
		    free (b2);
	    }
	    if (b1)
		free (b1);
	}
	fclose (fi);
    }
    return (0);
}

#endif

#ifndef NO_DO_CTAGS

int	dirpart (char *str)
{
    short   i;

    for (i = strlen (str) - 1; i >= 0; --i) {
	if (str[i] == '/' || str[i] == ':')
	    break;
    }
    return (i + 1);
}

#endif