/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>

#include "appenv.h"
#include "errors.h"
#include "fileops.h"
#include "general.h"
#include "gimprc.h"
#include "menus.h"
#include "plug_in.h"
#include "gimage.h"

#define ERROR  0
#define DONE   1
#define OK     2

typedef enum {
  TT_STRING,
  TT_PATH,
  TT_DOUBLE,
  TT_INT,
  TT_BOOLEAN,
  TT_POSITION,
  TT_MEMSIZE,
  TT_IMAGETYPE,
  TT_XCOLORCUBE,
  TT_XPREVSIZE,
  TT_XRULERUNIT,
  TT_XPLUGIN,
  TT_XPLUGINDEF,
  TT_XMENUPATH
} TokenType;

typedef struct _ParseFunc ParseFunc;

struct _ParseFunc
{
  char *name;
  TokenType type;
  gpointer val1p;
  gpointer val2p;
};

typedef struct _UnknownToken UnknownToken;

struct _UnknownToken
{
  char *token;
  char *value;
};

/*  global gimprc variables  */
char *    plug_in_path = NULL;
char *    temp_path = NULL;
char *    swap_path = NULL;
char *    brush_path = NULL;
char *    default_brush = NULL;
char *    pattern_path = NULL;
char *    default_pattern = NULL;
char *    palette_path = NULL;
char *    default_palette = NULL;
char *    gradient_path = NULL;
char *    default_gradient = NULL;
int       tile_cache_size = 4194304;  /* 4 MB */
int       marching_speed = 150;   /* 150 ms */
double    gamma_val = 1.0;
int       transparency_type = 1;  /* Mid-Tone Checks */
int       transparency_size = 1;  /* Medium sized */
int       levels_of_undo = 1;     /* 1 level of undo default */
int       color_cube_shades[4] = {6, 7, 4, 24};
int       install_cmap = 0;
int       cycled_marching_ants = 0;
int       default_threshold = 15;
int       stingy_memory_use = 0;
int       allow_resize_windows = 0;
int       no_cursor_updating = 0;
int       preview_size = 64;
int       show_rulers = TRUE;
int       ruler_units = GTK_PIXELS;
int       auto_save = TRUE;
int       cubic_interpolation = FALSE;
int       toolbox_x = 0, toolbox_y = 0;
int       progress_x = 170, progress_y = 5;
int       info_x = 165, info_y = 0;
int       color_select_x = 140, color_select_y = 120;
int       tool_options_x = 0, tool_options_y = 345;
int       confirm_on_close = TRUE;
int       default_width = 256;
int       default_height = 256;
int       default_type = RGB;
int       show_tips = TRUE;
int       last_tip = -1;

static int get_next_token (void);
static int peek_next_token (void);
static int parse_statement (void);

static int parse_string (gpointer val1p, gpointer val2p);
static int parse_path (gpointer val1p, gpointer val2p);
static int parse_double (gpointer val1p, gpointer val2p);
static int parse_int (gpointer val1p, gpointer val2p);
static int parse_boolean (gpointer val1p, gpointer val2p);
static int parse_position (gpointer val1p, gpointer val2p);
static int parse_mem_size (gpointer val1p, gpointer val2p);
static int parse_image_type (gpointer val1p, gpointer val2p);
static int parse_color_cube (gpointer val1p, gpointer val2p);
static int parse_preview_size (gpointer val1p, gpointer val2p);
static int parse_ruler_units (gpointer val1p, gpointer val2p);
static int parse_plug_in (gpointer val1p, gpointer val2p);
static int parse_plug_in_def (gpointer val1p, gpointer val2p);
static int parse_menu_path (gpointer val1p, gpointer val2p);

static int parse_proc_def (PlugInProcDef **proc_def);
static int parse_proc_arg (ProcArg *arg);
static int parse_unknown (char *token_sym);

static char* value_to_str (char *name);

static char* string_to_str (gpointer val1p, gpointer val2p);
static char* path_to_str (gpointer val1p, gpointer val2p);
static char* double_to_str (gpointer val1p, gpointer val2p);
static char* int_to_str (gpointer val1p, gpointer val2p);
static char* boolean_to_str (gpointer val1p, gpointer val2p);
static char* position_to_str (gpointer val1p, gpointer val2p);
static char* mem_size_to_str (gpointer val1p, gpointer val2p);
static char* image_type_to_str (gpointer val1p, gpointer val2p);
static char* color_cube_to_str (gpointer val1p, gpointer val2p);
static char* preview_size_to_str (gpointer val1p, gpointer val2p);
static char* ruler_units_to_str (gpointer val1p, gpointer val2p);

static char* transform_path (char *path, int destroy);
static char* gimprc_find_token (char *token);
static void gimprc_set_token (char *token, char *value);
static Argument * gimprc_query (Argument *args);
static void add_gimp_directory_token (char *gimp_dir);
static int open_backup_file (char *filename, FILE **fp_new, FILE **fp_old);

static ParseInfo parse_info;

static GList *unknown_tokens = NULL;

static int cur_token;
static int next_token;
static int done;

static ParseFunc funcs[] =
{
  { "temp-path",             TT_PATH,       &temp_path, NULL },
  { "swap-path",             TT_PATH,       &swap_path, NULL },
  { "brush-path",            TT_PATH,       &brush_path, NULL },
  { "pattern-path",          TT_PATH,       &pattern_path, NULL },
  { "plug-in-path",          TT_PATH,       &plug_in_path, NULL },
  { "palette-path",          TT_PATH,       &palette_path, NULL },
  { "gradient-path",         TT_PATH,       &gradient_path, NULL },
  { "default-brush",         TT_STRING,     &default_brush, NULL },
  { "default-pattern",       TT_STRING,     &default_pattern, NULL },
  { "default-palette",       TT_STRING,     &default_palette, NULL },
  { "default-gradient",      TT_STRING,     &default_gradient, NULL },
  { "gamma-correction",      TT_DOUBLE,     &gamma_val, NULL },
  { "color-cube",            TT_XCOLORCUBE, NULL, NULL },
  { "tile-cache-size",       TT_MEMSIZE,    &tile_cache_size, NULL },
  { "marching-ants-speed",   TT_INT,        &marching_speed, NULL },
  { "undo-levels",           TT_INT,        &levels_of_undo, NULL },
  { "transparency-type",     TT_INT,        &transparency_type, NULL },
  { "transparency-size",     TT_INT,        &transparency_size, NULL },
  { "install-colormap",      TT_BOOLEAN,    &install_cmap, NULL },
  { "colormap-cycling",      TT_BOOLEAN,    &cycled_marching_ants, NULL },
  { "default-threshold",     TT_INT,        &default_threshold, NULL },
  { "stingy-memory-use",     TT_BOOLEAN,    &stingy_memory_use, NULL },
  { "allow-resize-windows",  TT_BOOLEAN,    &allow_resize_windows, NULL },
  { "cursor-updating",       TT_BOOLEAN,    NULL, &no_cursor_updating },
  { "no-cursor-updating",    TT_BOOLEAN,    &no_cursor_updating, NULL },
  { "preview-size",          TT_XPREVSIZE,  NULL, NULL },
  { "show-rulers",           TT_BOOLEAN,    &show_rulers, NULL },
  { "dont-show-rulers",      TT_BOOLEAN,    NULL, &show_rulers },
  { "ruler-units",           TT_XRULERUNIT, NULL, NULL },
  { "auto-save",             TT_BOOLEAN,    &auto_save, NULL },
  { "dont-auto-save",        TT_BOOLEAN,    NULL, &auto_save },
  { "cubic-interpolation",   TT_BOOLEAN,    &cubic_interpolation, NULL },
  { "toolbox-position",      TT_POSITION,   &toolbox_x, &toolbox_y },
  { "progress-position",     TT_POSITION,   &progress_x, &progress_y },
  { "info-position",         TT_POSITION,   &info_x, &info_y },
  { "color-select-position", TT_POSITION,   &color_select_x, &color_select_y },
  { "tool-options-position", TT_POSITION,   &tool_options_x, &tool_options_y },
  { "confirm-on-close",      TT_BOOLEAN,    &confirm_on_close, NULL },
  { "dont-confirm-on-close", TT_BOOLEAN,    NULL, &confirm_on_close },
  { "show-tips",             TT_BOOLEAN,    &show_tips, NULL },
  { "dont-show-tips",        TT_BOOLEAN,    NULL, &show_tips },
  { "last-tip-shown",        TT_INT,        &last_tip, NULL },
  { "default-image-size",    TT_POSITION,   &default_width, &default_height },
  { "default-image-type",    TT_IMAGETYPE,  &default_type, NULL },
  { "plug-in",               TT_XPLUGIN,    NULL, NULL },
  { "plug-in-def",           TT_XPLUGINDEF, NULL, NULL },
  { "menu-path",             TT_XMENUPATH,  NULL, NULL },
};
static int nfuncs = sizeof (funcs) / sizeof (funcs[0]);

#define MAX_GIMPDIR_LEN 500

char *
gimp_directory ()
{
  static char gimp_dir[MAX_GIMPDIR_LEN + 1] = "";
  char *env_gimp_dir;
  char *env_home_dir;
  size_t len_env_home_dir = 0;

  if ('\000' != gimp_dir[0])
    return gimp_dir;

  env_gimp_dir = getenv ("GIMP_DIRECTORY");
  env_home_dir = getenv ("HOME");
  if (NULL != env_home_dir)
    len_env_home_dir = strlen (env_home_dir);

  if (NULL != env_gimp_dir)
    {
      if ('/' == env_gimp_dir[0])
	  strncpy (gimp_dir, env_gimp_dir, MAX_GIMPDIR_LEN);
      else
	{
	  if (NULL != env_home_dir)
	    {
	      strncpy (gimp_dir, env_home_dir, MAX_GIMPDIR_LEN);
	      gimp_dir[len_env_home_dir] = '/';
	    }
	  else
	    g_warning ("No home directory.");

	  strncpy (&gimp_dir[len_env_home_dir+1],
		   env_gimp_dir,
		   MAX_GIMPDIR_LEN - len_env_home_dir - 1);
	}
    }
  else
    {
      if (NULL != env_home_dir)
	{
	  strncpy (gimp_dir, env_home_dir, MAX_GIMPDIR_LEN);
	  gimp_dir[len_env_home_dir] = '/';
	}
      else
	g_warning ("No home directory.");

      strncpy (&gimp_dir[len_env_home_dir+1],
	       GIMPDIR,
	       MAX_GIMPDIR_LEN - len_env_home_dir - 1);
    }

  gimp_dir[MAX_GIMPDIR_LEN] = '\000';
  return gimp_dir;
}

void
parse_gimprc ()
{
  char libfilename[512];
  char filename[512];
  char *gimp_dir;

  parse_info.buffer = g_new (char, 4096);
  parse_info.tokenbuf = parse_info.buffer + 2048;
  parse_info.buffer_size = 2048;
  parse_info.tokenbuf_size = 2048;

  gimp_dir = gimp_directory ();
  add_gimp_directory_token (gimp_dir);

  sprintf (libfilename, "%s/gimprc", DATADIR);
  parse_gimprc_file (libfilename);

  sprintf (filename, "%s/gimprc", gimp_dir);
  if (strcmp (filename, libfilename) != 0)
    parse_gimprc_file (filename);
}

void
parse_gimprc_file (char *filename)
{
  static char *home_dir = NULL;
  int status;
  char rfilename[512];

  if (filename[0] != '/')
    {
      if (!home_dir)
	home_dir = g_strdup (getenv ("HOME"));
      sprintf (rfilename, "%s/%s", home_dir, filename);
      filename = rfilename;
    }

  parse_info.fp = fopen (filename, "rt");
  if (!parse_info.fp)
    return;

  g_print ("parsing \"%s\"\n", filename);

  cur_token = -1;
  next_token = -1;

  parse_info.position = -1;
  parse_info.linenum = 1;
  parse_info.charnum = 1;
  parse_info.inc_linenum = FALSE;
  parse_info.inc_charnum = FALSE;

  done = FALSE;
  while ((status = parse_statement ()) == OK)
    ;

  fclose (parse_info.fp);

  if (status == ERROR)
    {
      g_print ("error parsing: \"%s\"\n", filename);
      g_print ("  at line %d column %d\n", parse_info.linenum, parse_info.charnum);
      g_print ("  unexpected token: %s\n", token_sym);
    }
}

static GList *
g_list_findstr (GList *list,
		char *str)
{
  while (list)
    {
      if (! strcmp ((char *) list->data, str))
        break;
      list = list->next;
    }

  return list;
}

void
save_gimprc (GList **updated_options,
	     GList **conflicting_options)
{
  char timestamp[40];
  char *gimp_dir;
  char name[512];
  FILE *fp_new;
  FILE *fp_old;
  GList *option;
  char *cur_line;
  char *prev_line;
  char *str;

  g_assert(updated_options != NULL);
  g_assert(conflicting_options != NULL);

  gimp_dir = gimp_directory ();
  sprintf (name, "%s/gimprc", gimp_dir);

  if (! open_backup_file (name, &fp_new, &fp_old))
    {
      /* FIXME: show the error in a nice dialog box */
      g_warning ("cannot save .gimprc");
      return;
    }

  strcpy (timestamp, "by GIMP on ");
  iso_8601_date_format (timestamp + strlen (timestamp), FALSE);

  /* copy the old .gimprc into the new one, modifying it as needed */
  prev_line = NULL;
  cur_line = g_new (char, 1024);
  while (!feof (fp_old))
    {
      if (!fgets (cur_line, 1024, fp_old))
	continue;
      
      /* special case: save lines starting with '#-' (added by GIMP) */
      if ((cur_line[0] == '#') && (cur_line[1] == '-'))
	{
	  if (prev_line != NULL)
	    {
	      fputs (prev_line, fp_new);
	      g_free (prev_line);
	    }
	  prev_line = g_strdup (cur_line);
	  continue;
	}

      /* see if the line contains something that we can use */
      if (find_token (cur_line, name, 50))
	{
	  /* check if that entry should be updated */
	  option = g_list_findstr (*updated_options, name);
	  if (option != NULL)
	    {
	      if (prev_line == NULL)
		{
		  fprintf (fp_new, "#- Next line commented out %s\n",
			   timestamp);
		  fprintf (fp_new, "# %s\n", cur_line);
		  fprintf (fp_new, "#- Next line added %s\n",
			   timestamp);
		}
	      else
		{
		  g_free (prev_line);
		  prev_line = NULL;
		  fprintf (fp_new, "#- Next line modified %s\n",
			   timestamp);
		}
	      str = value_to_str (name);
	      fprintf (fp_new, "(%s %s)\n", name, str);
	      g_free (str);

	      *updated_options = g_list_remove_link (*updated_options, option);
	      *conflicting_options = g_list_append (*conflicting_options,
						    (gpointer) option->data);
	      g_list_free_1 (option);
	      continue;
	    }

	  /* check if that entry should be commented out */
	  option = g_list_findstr (*conflicting_options, name);
	  if (option != NULL)
	    {
	      if (prev_line != NULL)
		{
		  g_free (prev_line);
		  prev_line = NULL;
		}
	      fprintf (fp_new, "#- Next line commented out %s\n",
		       timestamp);
	      fprintf (fp_new, "# %s\n", cur_line);
	      continue;
	    }
	}

      /* all lines that did not match the tests above are simply copied */
      if (prev_line != NULL)
	{
	  fputs (prev_line, fp_new);
	  g_free (prev_line);
	  prev_line = NULL;
	}
      fputs (cur_line, fp_new);

    }

  g_free (cur_line);
  if (prev_line != NULL)
    g_free (prev_line);
  fclose (fp_old);

  /* append the options that were not in the old .gimprc */
  option = *updated_options;
  while (option)
    {
      fprintf (fp_new, "#- Next line added %s\n",
	       timestamp);
      str = value_to_str ((char *) option->data);
      fprintf (fp_new, "(%s %s)\n\n", (char *) option->data, str);
      g_free (str);
      option = option->next;
    }
  fclose (fp_new);
}

static int
get_next_token ()
{
  if (next_token != -1)
    {
      cur_token = next_token;
      next_token = -1;
    }
  else
    {
      cur_token = get_token (&parse_info);
    }

  return cur_token;
}

static int
peek_next_token ()
{
  if (next_token == -1)
    next_token = get_token (&parse_info);

  return next_token;
}

static int
parse_statement ()
{
  int token;
  int i;

  token = peek_next_token ();
  if (!token)
    return DONE;
  if (token != TOKEN_LEFT_PAREN)
    return ERROR;
  token = get_next_token ();

  token = peek_next_token ();
  if (!token || (token != TOKEN_SYMBOL))
    return ERROR;
  token = get_next_token ();

  for (i = 0; i < nfuncs; i++)
    if (strcmp (funcs[i].name, token_sym) == 0)
      switch (funcs[i].type)
	{
	case TT_STRING:
	  return parse_string (funcs[i].val1p, funcs[i].val2p);
	case TT_PATH:
	  return parse_path (funcs[i].val1p, funcs[i].val2p);
	case TT_DOUBLE:
	  return parse_double (funcs[i].val1p, funcs[i].val2p);
	case TT_INT:
	  return parse_int (funcs[i].val1p, funcs[i].val2p);
	case TT_BOOLEAN:
	  return parse_boolean (funcs[i].val1p, funcs[i].val2p);
	case TT_POSITION:
	  return parse_position (funcs[i].val1p, funcs[i].val2p);
	case TT_MEMSIZE:
	  return parse_mem_size (funcs[i].val1p, funcs[i].val2p);
	case TT_IMAGETYPE:
	  return parse_image_type (funcs[i].val1p, funcs[i].val2p);
	case TT_XCOLORCUBE:
	  return parse_color_cube (funcs[i].val1p, funcs[i].val2p);
	case TT_XPREVSIZE:
	  return parse_preview_size (funcs[i].val1p, funcs[i].val2p);
	case TT_XRULERUNIT:
	  return parse_ruler_units (funcs[i].val1p, funcs[i].val2p);
	case TT_XPLUGIN:
	  return parse_plug_in (funcs[i].val1p, funcs[i].val2p);
	case TT_XPLUGINDEF:
	  return parse_plug_in_def (funcs[i].val1p, funcs[i].val2p);
	case TT_XMENUPATH:
	  return parse_menu_path (funcs[i].val1p, funcs[i].val2p);
	}

  return parse_unknown (token_sym);
}

static int
parse_path (gpointer val1p,
	    gpointer val2p)
{
  int token;
  char **pathp;

  g_assert (val1p != NULL);
  pathp = (char **)val1p;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    return ERROR;
  token = get_next_token ();

  if (*pathp)
    g_free (*pathp);
  *pathp = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    {
      g_free (*pathp);
      *pathp = NULL;
      return ERROR;
    }
  token = get_next_token ();

  *pathp = transform_path (*pathp, TRUE);

  return OK;
}

static int
parse_string (gpointer val1p,
	      gpointer val2p)
{
  int token;
  char **strp;

  g_assert (val1p != NULL);
  strp = (char **)val1p;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    return ERROR;
  token = get_next_token ();

  if (*strp)
    g_free (*strp);
  *strp = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    {
      g_free (*strp);
      *strp = NULL;
      return ERROR;
    }
  token = get_next_token ();

  return OK;
}

static int
parse_double (gpointer val1p,
	      gpointer val2p)
{
  int token;
  double *nump;

  g_assert (val1p != NULL);
  nump = (double *)val1p;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  *nump = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_int (gpointer val1p,
	   gpointer val2p)
{
  int token;
  int *nump;

  g_assert (val1p != NULL);
  nump = (int *)val1p;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  *nump = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_boolean (gpointer val1p,
	       gpointer val2p)
{
  int token;
  int *boolp;

  /* The variable to be set should be passed in the first or second
   * pointer.  If the pointer is in val2p, then the opposite value is
   * stored in the pointer.  This is useful for "dont-xxx" or "no-xxx"
   * type of options.
   * If the expression to be parsed is written as "(option)" instead
   * of "(option yes)" or "(option no)", then the default value is
   * TRUE if the variable is passed in val1p, or FALSE if in val2p.
   */
  g_assert (val1p != NULL || val2p != NULL);
  if (val1p != NULL)
    boolp = (int *)val1p;
  else
    boolp = (int *)val2p;

  token = peek_next_token ();
  if (!token)
    return ERROR;
  switch (token)
    {
    case TOKEN_RIGHT_PAREN:
      *boolp = TRUE;
      break;
    case TOKEN_NUMBER:
      token = get_next_token ();
      *boolp = token_num;
      token = peek_next_token ();
      if (!token || (token != TOKEN_RIGHT_PAREN))
	return ERROR;
      break;
    case TOKEN_SYMBOL:
      token = get_next_token ();
      if (!strcmp (token_sym, "true") || !strcmp (token_sym, "on")
	  || !strcmp (token_sym, "yes"))
	*boolp = TRUE;
      else if (!strcmp (token_sym, "false") || !strcmp (token_sym, "off")
	       || !strcmp (token_sym, "no"))
	*boolp = FALSE;
      else
	return ERROR;
      token = peek_next_token ();
      if (!token || (token != TOKEN_RIGHT_PAREN))
	return ERROR;
      break;
    default:
      return ERROR;
    }

  if (val1p == NULL)
    *boolp = !*boolp;

  token = get_next_token ();

  return OK;
}

static int
parse_position (gpointer val1p,
		gpointer val2p)
{
  int token;
  int *xp;
  int *yp;

  g_assert (val1p != NULL && val2p != NULL);
  xp = (int *)val1p;
  yp = (int *)val2p;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  *xp = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  *yp = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_mem_size (gpointer val1p,
		gpointer val2p)
{
  int mult;
  int suffix;
  int token;
  int *sizep;

  g_assert (val1p != NULL);
  sizep = (int *)val1p;

  token = peek_next_token ();
  if (!token || ((token != TOKEN_NUMBER) &&
		 (token != TOKEN_SYMBOL)))
    return ERROR;
  token = get_next_token ();

  if (token == TOKEN_NUMBER)
    {
      *sizep = token_num * 1024;
    }
  else
    {
      *sizep = atoi (token_sym);

      suffix = token_sym[strlen (token_sym) - 1];
      if ((suffix == 'm') || (suffix == 'M'))
	mult = 1024 * 1024;
      else if ((suffix == 'k') || (suffix == 'K'))
	mult = 1024;
      else if ((suffix == 'b') || (suffix == 'B'))
	mult = 1;
      else
	return FALSE;

      *sizep *= mult;
    }

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_image_type (gpointer val1p,
		  gpointer val2p)
{
  int token;
  int *typep;
  
  g_assert (val1p != NULL);
  typep = (int *)val1p;

  token = peek_next_token ();
  if (!token || (token != TOKEN_SYMBOL))
    return ERROR;
  token = get_next_token ();
 
  if (!strcmp (token_sym, "rgb"))
    *typep = RGB;
  else if ((!strcmp (token_sym, "gray")) || (!strcmp (token_sym, "grey")))
    *typep = GRAY;
  else
    return ERROR;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_color_cube (gpointer val1p,
		  gpointer val2p)
{
  int token;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  color_cube_shades[0] = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  color_cube_shades[1] = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  color_cube_shades[2] = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  color_cube_shades[3] = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_preview_size (gpointer val1p,
		    gpointer val2p)
{
  int token;

  token = peek_next_token ();
  if (!token || (token != TOKEN_SYMBOL && token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  if (token == TOKEN_SYMBOL)
    {
      if (strcmp (token_sym, "none") == 0)
	preview_size = 0;
      else if (strcmp (token_sym, "small") == 0)
	preview_size = 32;
      else if (strcmp (token_sym, "medium") == 0)
	preview_size = 64;
      else if (strcmp (token_sym, "large") == 0)
	preview_size = 128;
      else
	preview_size = 0;
    }
  else if (token == TOKEN_NUMBER)
    preview_size = token_num;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_ruler_units (gpointer val1p,
		   gpointer val2p)
{
  int token;

  token = peek_next_token ();
  if (!token || (token != TOKEN_SYMBOL))
    return ERROR;
  token = get_next_token ();

  if (strcmp (token_sym, "pixels") == 0)
    ruler_units = GTK_PIXELS;
  else if (strcmp (token_sym, "inches") == 0)
    ruler_units = GTK_INCHES;
  else if (strcmp (token_sym, "centimeters") == 0)
    ruler_units = GTK_CENTIMETERS;
  else
    ruler_units = GTK_PIXELS;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    return ERROR;
  token = get_next_token ();

  return OK;
}

static int
parse_plug_in (gpointer val1p,
	       gpointer val2p)
{
  char *name;
  char *menu_path;
  char *accelerator;
  int token;

  name = NULL;
  menu_path = NULL;
  accelerator = NULL;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    return ERROR;
  token = get_next_token ();

  name = g_strdup (token_str);

  token = peek_next_token ();
  if (token == TOKEN_STRING)
    {
      menu_path = g_strdup (token_str);
      token = get_next_token ();
    }

  token = peek_next_token ();
  if (token == TOKEN_STRING)
    {
      accelerator = g_strdup (token_str);
      token = get_next_token ();
    }

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    {
      g_free (name);
      g_free (menu_path);
      g_free (accelerator);
      return ERROR;
    }
  token = get_next_token ();

  if (name && menu_path)
    plug_in_add (name, menu_path, accelerator);

  return OK;
}

static int
parse_plug_in_def (gpointer val1p,
		   gpointer val2p)
{
  PlugInDef *plug_in_def;
  PlugInProcDef *proc_def;
  GSList *tmp_list;
  int token;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    return ERROR;
  token = get_next_token ();

  plug_in_def = g_new (PlugInDef, 1);
  plug_in_def->prog = g_strdup (token_str);
  plug_in_def->proc_defs = NULL;
  plug_in_def->mtime = 0;
  plug_in_def->query = FALSE;

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    goto error;
  token = get_next_token ();

  plug_in_def->mtime = token_int;

  while (parse_proc_def (&proc_def))
    {
      proc_def->prog = g_strdup (plug_in_def->prog);
      plug_in_def->proc_defs = g_slist_append (plug_in_def->proc_defs, proc_def);
    }

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    goto error;
  token = get_next_token ();

  plug_in_def_add (plug_in_def);

  return OK;

error:
  g_warning ("error parsing pluginrc");
  tmp_list = plug_in_def->proc_defs;
  while (tmp_list)
    {
      g_free (tmp_list->data);
      tmp_list = tmp_list->next;
    }
  g_slist_free (plug_in_def->proc_defs);
  g_free (plug_in_def->prog);
  g_free (plug_in_def);

  return ERROR;
}

static int
parse_proc_def (PlugInProcDef **proc_def)
{
  PlugInProcDef *pd;
  int token;
  int i;

  token = peek_next_token ();
  if (!token || (token != TOKEN_LEFT_PAREN))
    return ERROR;
  token = get_next_token ();

  token = peek_next_token ();
  if (!token || (token != TOKEN_SYMBOL) ||
      (strcmp ("proc-def", token_sym) != 0))
    return ERROR;
  token = get_next_token ();

  pd = g_new0 (PlugInProcDef, 1);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  pd->db_info.name = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    goto error;
  token = get_next_token ();

  pd->db_info.proc_type = token_int;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  pd->db_info.blurb = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  pd->db_info.help = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  pd->db_info.author = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  pd->db_info.copyright = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  pd->db_info.date = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  if (token_str[0] != '\0')
    pd->menu_path = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  if (token_str[0] != '\0')
    pd->extensions = g_strdup (token_str);
  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();
  if (token_str[0] != '\0')
    pd->prefixes = g_strdup (token_str);
  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();
  if (token_str[0] != '\0')
    pd->magics = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  if (token_str[0] != '\0')
    {
      pd->image_types = g_strdup (token_str);
      pd->image_types_val = plug_in_image_types_parse (token_str);
    }

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    goto error;
  token = get_next_token ();

  pd->db_info.num_args = token_int;
  pd->db_info.args = g_new0 (ProcArg, pd->db_info.num_args);

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    goto error;
  token = get_next_token ();

  pd->db_info.num_values = token_int;
  pd->db_info.values = NULL;
  if (pd->db_info.num_values > 0)
    pd->db_info.values = g_new (ProcArg, pd->db_info.num_values);

  for (i = 0; i < pd->db_info.num_args; i++)
    if (!parse_proc_arg (&pd->db_info.args[i]))
      goto error;

  for (i = 0; i < pd->db_info.num_values; i++)
    if (!parse_proc_arg (&pd->db_info.values[i]))
      goto error;

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    goto error;
  token = get_next_token ();

  *proc_def = pd;
  return OK;

error:
  g_free (pd->db_info.name);
  g_free (pd->db_info.blurb);
  g_free (pd->db_info.help);
  g_free (pd->db_info.author);
  g_free (pd->db_info.copyright);
  g_free (pd->db_info.date);
  g_free (pd->menu_path);
  g_free (pd->extensions);
  g_free (pd->prefixes);
  g_free (pd->magics);
  g_free (pd->image_types);

  for (i = 0; i < pd->db_info.num_args; i++)
    {
      g_free (pd->db_info.args[i].name);
      g_free (pd->db_info.args[i].description);
    }

  for (i = 0; i < pd->db_info.num_values; i++)
    {
      g_free (pd->db_info.values[i].name);
      g_free (pd->db_info.values[i].description);
    }

  g_free (pd->db_info.args);
  g_free (pd->db_info.values);
  g_free (pd);
  return ERROR;
}

static int
parse_proc_arg (ProcArg *arg)
{
  int token;

  arg->arg_type = -1;
  arg->name = NULL;
  arg->description = NULL;

  token = peek_next_token ();
  if (!token || (token != TOKEN_LEFT_PAREN))
    return ERROR;
  token = get_next_token ();

  token = peek_next_token ();
  if (!token || (token != TOKEN_SYMBOL) ||
      (strcmp ("proc-arg", token_sym) != 0))
    return ERROR;
  token = get_next_token ();

  token = peek_next_token ();
  if (!token || (token != TOKEN_NUMBER))
    return ERROR;
  token = get_next_token ();

  arg->arg_type = token_int;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    return ERROR;
  token = get_next_token ();

  arg->name = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  arg->description = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    goto error;
  token = get_next_token ();

  return OK;

error:
  g_free (arg->name);
  g_free (arg->description);

  return ERROR;
}

static int
parse_menu_path (gpointer val1p,
		 gpointer val2p)
{
  char *menu_path;
  char *accelerator;
  int token;

  menu_path = NULL;
  accelerator = NULL;

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  menu_path = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    goto error;
  token = get_next_token ();

  accelerator = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    goto error;
  token = get_next_token ();

  menus_add_path (menu_path, accelerator);

  return OK;

error:
  g_free (menu_path);
  g_free (accelerator);

  return ERROR;
}

static char*
transform_path (char *path,
		int   destroy)
{
  int length;
  char *new_path;
  char *home;
  char *token;
  char *tmp;
  char *tmp2;
  int  substituted;

  home = getenv ("HOME");
  length = 0;
  substituted = FALSE;

  tmp = path;
  while (*tmp)
    {
      if (*tmp == '~')
	{
	  length += strlen (home);
	  tmp += 1;
	}
      else if (*tmp == '$')
	{
	  tmp += 1;
	  if (!*tmp || (*tmp != '{'))
	    return path;
	  tmp += 1;

	  token = tmp;
	  while (*tmp && (*tmp != '}'))
	    tmp += 1;

	  if (!*tmp)
	    return path;

	  *tmp = '\0';

	  tmp2 = gimprc_find_token (token);
	  tmp2 = transform_path (tmp2, FALSE);
	  gimprc_set_token (token, tmp2);

	  length += strlen (tmp2);

	  *tmp = '}';
	  tmp += 1;

	  substituted = TRUE;
	}
      else
	{
	  length += 1;
	  tmp += 1;
	}
    }

  if ((length == strlen (path)) && !substituted)
    return path;

  new_path = g_new (char, length + 1);

  tmp = path;
  tmp2 = new_path;

  while (*tmp)
    {
      if (*tmp == '~')
	{
	  *tmp2 = '\0';
	  strcat (tmp2, home);
	  tmp2 += strlen (home);
	  tmp += 1;
	}
      else if (*tmp == '$')
	{
	  tmp += 1;
	  if (!*tmp || (*tmp != '{'))
	    {
	      g_free (new_path);
	      return path;
	    }
	  tmp += 1;

	  token = tmp;
	  while (*tmp && (*tmp != '}'))
	    tmp += 1;

	  if (!*tmp)
	    {
	      g_free (new_path);
	      return path;
	    }

	  *tmp = '\0';
	  token = gimprc_find_token (token);
	  *tmp = '}';

	  *tmp2 = '\0';
	  strcat (tmp2, token);
	  tmp2 += strlen (token);
	  tmp += 1;
	}
      else
	{
	  *tmp2++ = *tmp++;
	}
    }

  *tmp2 = '\0';

  if (destroy)
    g_free (path);

  return new_path;
}

static int
parse_unknown (char *token_sym)
{
  int token;
  UnknownToken *ut, *tmp;
  GList *list;

  ut = g_new (UnknownToken, 1);
  ut->token = g_strdup (token_sym);

  token = peek_next_token ();
  if (!token || (token != TOKEN_STRING))
    {
      g_free (ut->token);
      g_free (ut);
      return ERROR;
    }
  token = get_next_token ();

  ut->value = g_strdup (token_str);

  token = peek_next_token ();
  if (!token || (token != TOKEN_RIGHT_PAREN))
    {
      g_free (ut->token);
      g_free (ut->value);
      g_free (ut);
      return ERROR;
    }
  token = get_next_token ();

  /*  search through the list of unknown tokens and replace an existing entry  */
  list = unknown_tokens;
  while (list)
    {
      tmp = (UnknownToken *) list->data;
      list = list->next;

      if (strcmp (tmp->token, ut->token) == 0)
	{
	  unknown_tokens = g_list_remove (unknown_tokens, tmp);
	  g_free (tmp->token);
	  g_free (tmp->value);
	  g_free (tmp);
	}
    }

  ut->value = transform_path (ut->value, TRUE);
  unknown_tokens = g_list_append (unknown_tokens, ut);

  return OK;
}

static char *
value_to_str (char *name)
{
  int i;

  for (i = 0; i < nfuncs; i++)
    if (! strcmp (funcs[i].name, name))
      switch (funcs[i].type)
	{
	case TT_STRING:
	  return string_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_PATH:
	  return path_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_DOUBLE:
	  return double_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_INT:
	  return int_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_BOOLEAN:
	  return boolean_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_POSITION:
	  return position_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_MEMSIZE:
	  return mem_size_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_IMAGETYPE:
	  return image_type_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_XCOLORCUBE:
	  return color_cube_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_XPREVSIZE:
	  return preview_size_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_XRULERUNIT:
	  return ruler_units_to_str (funcs[i].val1p, funcs[i].val2p);
	case TT_XPLUGIN:
	case TT_XPLUGINDEF:
	case TT_XMENUPATH:
	  return NULL;
	}
  return NULL;
}

static char *
string_to_str (gpointer val1p,
	       gpointer val2p)
{
  return g_strdup (*((char **)val1p));
}

static char *
path_to_str (gpointer val1p,
	     gpointer val2p)
{
  return g_strdup (*((char **)val1p));
}

static char *
double_to_str (gpointer val1p,
	       gpointer val2p)
{
  char *str;

  str = g_malloc (20);
  sprintf (str, "%f", *((double *)val1p));
  return str;
}

static char *
int_to_str (gpointer val1p,
	    gpointer val2p)
{
  char *str;

  str = g_malloc (20);
  sprintf (str, "%d", *((int *)val1p));
  return str;
}

static char *
boolean_to_str (gpointer val1p,
		gpointer val2p)
{
  int v;

  if (val1p != NULL)
    v = *((int *)val1p);
  else
    v = !*((int *)val2p);
  if (v)
    return g_strdup ("yes");
  else
    return g_strdup ("no");
}

static char *
position_to_str (gpointer val1p,
		 gpointer val2p)
{
  char *str;

  str = g_malloc (40);
  sprintf (str, "%d %d", *((int *)val1p), *((int *)val2p));
  return str;
}

static char *
mem_size_to_str (gpointer val1p,
		 gpointer val2p)
{
  int size;
  char *str;

  size = *((int *)val1p);
  str = g_malloc (20);
  if (size % 1048576 == 0)
    sprintf (str, "%dM", size / 1048576);
  else if (size % 1024 == 0)
    sprintf (str, "%dK", size / 1024);
  else
    sprintf (str, "%dB", size);
  return str;
}

static char *
image_type_to_str (gpointer val1p,
		   gpointer val2p)
{
  int type;

  type = *((int *)val1p);
  if (type == GRAY)
    return g_strdup ("gray");
  else
    return g_strdup ("rgb");
}

static char *
color_cube_to_str (gpointer val1p,
		   gpointer val2p)
{
  char *str;

  str = g_malloc (40);
  sprintf (str, "%d %d %d  %d",
	   color_cube_shades[0], color_cube_shades[1],
	   color_cube_shades[2], color_cube_shades[3]);
  return str;
}

static char *
preview_size_to_str (gpointer val1p,
		     gpointer val2p)
{
  if (preview_size >= 128)
    return g_strdup ("large");
  else if (preview_size >= 64)
    return g_strdup ("medium");
  else if (preview_size >= 32)
    return g_strdup ("small");
  else
    return g_strdup ("none");
}

static char *
ruler_units_to_str (gpointer val1p,
		    gpointer val2p)
{
  switch (ruler_units)
    {
    case GTK_INCHES:
      return g_strdup ("inches");
    case GTK_CENTIMETERS:
      return g_strdup ("centimeters");
    case GTK_PIXELS:
      return g_strdup ("pixels");
    }
  return NULL;
}

static void
add_gimp_directory_token (char *gimp_dir)
{
  UnknownToken *ut;

  /*
    The token holds data from a static buffer which is initialized
    once.  There should be no need to change an already-existing
    value.
  */
  if (NULL != gimprc_find_token ("gimp_dir"))
    return;

  ut = g_new (UnknownToken, 1);
  ut->token = g_strdup ("gimp_dir");
  ut->value = g_strdup (gimp_dir);

  /* Similarly, transforming the path should be silly. */
  unknown_tokens = g_list_append (unknown_tokens, ut);
}

static int
open_backup_file (char *filename,
		  FILE **fp_new,
		  FILE **fp_old)
{
  char *oldfilename;

  /*
    Rename the file to *.old, open it for reading and create the new file.
  */
  if ((*fp_old = fopen (filename, "rt")) == NULL)
    return FALSE;

  oldfilename = g_malloc (strlen (filename) + 5);
  sprintf (oldfilename, "%s.old", filename);
  if (rename (filename, oldfilename) < 0)
    {
      g_free (oldfilename);
      return FALSE;
    }

  if ((*fp_new = fopen (filename, "wt")) == NULL)
    {
      (void) rename (oldfilename, filename);
      g_free (oldfilename);
      return FALSE;
    }

  g_free (oldfilename);
  return TRUE;
}

static char*
gimprc_find_token (char *token)
{
  GList *list;
  UnknownToken *ut;

  list = unknown_tokens;
  while (list)
    {
      ut = (UnknownToken *) list->data;
      if (strcmp (ut->token, token) == 0)
	return ut->value;
      list = list->next;
    }

  return NULL;
}

static void
gimprc_set_token (char *token,
		  char *value)
{
  GList *list;
  UnknownToken *ut;

  list = unknown_tokens;
  while (list)
    {
      ut = (UnknownToken *) list->data;
      if (strcmp (ut->token, token) == 0)
	{
	  if (ut->value != value)
	    {
	      if (ut->value)
		g_free (ut->value);
	      ut->value = value;
	    }
	  break;
	}
      list = list->next;
    }
}

/******************/
/*  GIMPRC_QUERY  */

static Argument *
gimprc_query (Argument *args)
{
  Argument *return_args;
  int success = TRUE;
  char *token;
  char *value;

  token = (char *) args[0].value.pdb_pointer;

  success = ((value = gimprc_find_token (token)) != NULL);
  return_args = procedural_db_return_args (&gimprc_query_proc, success);

  if (success)
    return_args[1].value.pdb_pointer = g_strdup (value);

  return return_args;
}

static ProcArg gimprc_query_args[] =
{
  { PDB_STRING,
    "token",
    "the token to query for"
  }
};

static ProcArg gimprc_query_out_args[] =
{
  { PDB_STRING,
    "value",
    "the value associated with the queried token"
  }
};

ProcRecord gimprc_query_proc =
{
  "gimp_gimprc_query",
  "Queries the gimprc file parser for information on a specified token",
  "This procedure is used to locate additional information contained in the gimprc file considered extraneous to the operation of the GIMP.  Plug-ins that need configuration information can expect it will be stored in the user's gimprc file and can use this procedure to retrieve it.  This query procedure will return the value associated with the specified token.  This corresponds _only_ to entries with the format: (<token> <value>).  The value must be a string.  Entries not corresponding to this format will cause warnings to be issued on gimprc parsing and will not be queryable.",
  "Spencer Kimball & Peter Mattis",
  "Spencer Kimball & Peter Mattis",
  "1997",
  PDB_INTERNAL,

  /*  Input arguments  */
  1,
  gimprc_query_args,

  /*  Output arguments  */
  1,
  gimprc_query_out_args,

  /*  Exec method  */
  { { gimprc_query } },
};
