/*
 * $XConsortium: ParseCmd.c,v 1.15 88/10/12 16:29:36 swick Exp $
 */

/***********************************************************
Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.

                        All Rights Reserved

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 appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Digital or MIT not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL 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.

******************************************************************/

/*
 * XrmParseCommand()
 * 
 * Parse command line and store argument values into resource database
 * 
 * Allows any un-ambiguous abbreviation for an option name, but requires that
 * the table be ordered with any options that are prefixes of other options
 * appearing before the longer version in the table.
 */

#include <X11/Xlib.h>
#include "Xlibint.h"
#include <X11/Xresource.h>
#include <stdio.h>


static void 
_XReportParseError (arg, msg)
  XrmOptionDescRec *arg;
  char *msg;
{
  (void) fprintf (stderr, "Error parsing argument \"%s\" (%s); %s\n",
		  arg->option, arg->specifier, msg);
  exit (1);
}

void 
XrmParseCommand (pdb, options, num_options, prefix, argc, argv)
  XrmDatabase *pdb;		/* data base */
  register XrmOptionDescList options;	/* pointer to table of valid options */
  int num_options;		/* number of options		     */
  char *prefix;			/* name to prefix resources with     */
  int *argc;			/* address of argument count 	     */
  char **argv;			/* argument list (command line)	     */
{
  int foundOption;
  char **argsave;
  register int i, myargc;
  XrmBinding bindings[100];
  XrmQuark quarks[100];
  XrmBinding *start_bindings;
  XrmQuark *start_quarks;
  char *optP, *argP, optchar, argchar;
  int matches;
  enum {
    DontCare, Check, NotSorted, Sorted
  } table_is_sorted;
  char **argend;

#define PutCommandResource(value_str)				\
{								\
    XrmStringToBindingQuarkList(				\
	options[i].specifier, start_bindings, start_quarks);    \
    XrmQPutStringResource(pdb, bindings, quarks, value_str);    \
}				/* PutCommandResource */

  myargc = (*argc);
  argend = argv + myargc;
  argsave = ++argv;

  /* Parse prefix into bindings and quark list */
  XrmStringToBindingQuarkList (prefix, bindings, quarks);
  for (start_bindings = bindings, start_quarks = quarks;
       *start_quarks != NULLQUARK;
       start_bindings++, start_quarks++) {
  };

  table_is_sorted = (myargc > 2) ? Check : DontCare;
  for (--myargc; myargc > 0; --myargc, ++argv) {
    foundOption = False;
    matches = 0;
    for (i = 0; i < num_options; ++i) {

      /*
       * checking the sort order first insures we don't have to re-do the
       * check if the arg hits on the last entry in the table.  Useful
       * because usually '=' is the last entry and users frequently specify
       * geometry early in the command
       */
      if (table_is_sorted == Check && i > 0 &&
	  strcmp (options[i].option, options[i - 1].option) < 0) {
	table_is_sorted = NotSorted;
      }
      for (argP = *argv, optP = options[i].option;
	   (optchar = *optP++) != NULL &&
	   (argchar = *argP++) != NULL &&
	   argchar == optchar;) ;
      if (optchar == NULL) {
	if (*argP == NULL ||
	    options[i].argKind == XrmoptionStickyArg ||
	    options[i].argKind == XrmoptionIsArg) {
	  /* give preference to exact matches, StickyArg and IsArg */
	  matches = 1;
	  foundOption = i;
	  break;
	}
      }
      else if (argchar == NULL) {
	/* may be an abbreviation for this option */
	matches++;
	foundOption = i;
      }
      else if (table_is_sorted == Sorted && optchar > argchar) {
	break;
      }
      if (table_is_sorted == Check && i > 0 &&
	  strcmp (options[i].option, options[i - 1].option) < 0) {
	table_is_sorted = NotSorted;
      }
    }
    if (table_is_sorted == Check && i >= (num_options - 1))
      table_is_sorted = Sorted;
    if (matches == 1) {
      i = foundOption;
      switch (options[i].argKind) {
      case XrmoptionNoArg:
	--(*argc);
	PutCommandResource (options[i].value);
	break;

      case XrmoptionIsArg:
	--(*argc);
	PutCommandResource (*argv);
	break;

      case XrmoptionStickyArg:
	--(*argc);
	PutCommandResource (argP);
	break;

      case XrmoptionSepArg:
	--(*argc);
	++argv;
	--myargc;
	--(*argc);
	PutCommandResource (*argv);
	break;

      case XrmoptionResArg:
	++argv;
	--myargc;
	--(*argc);
	--(*argc);
	XrmPutLineResource (pdb, *argv);
	break;

      case XrmoptionSkipArg:
	--myargc;
	(*argsave++) = (*argv++);
	(*argsave++) = (*argv);
	break;

      case XrmoptionSkipLine:
	for (; myargc > 0; myargc--)
	  (*argsave++) = (*argv++);
	break;

      default:
	_XReportParseError (&options[i], "unknown kind");
	break;
      }
    }
    else
      (*argsave++) = (*argv);	/* compress arglist */
  }

  if (argsave < argend)
    (*argsave) = NULL;		/* put NULL terminator on compressed argv */
}