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color_filters.c

/* color_filters.c
 * Routines for color filters
 *
 * $Id: color_filters.c 32079 2010-03-02 00:26:51Z guy $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
/*
 * Updated 1 Dec 10 jjm
 */

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

#include <glib.h>

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

#include <epan/filesystem.h>
#include <wsutil/file_util.h>

#include <epan/packet.h>
#include "color.h"
#include "color_filters.h"
#include "file.h"
#include <epan/dfilter/dfilter.h>
#include "simple_dialog.h"
#include "ui_util.h"
#include <epan/prefs.h>

#define RED_COMPONENT(x)   (guint16) (((((x) >> 16) & 0xff) * 65535 / 255))
#define GREEN_COMPONENT(x) (guint16) (((((x) >>  8) & 0xff) * 65535 / 255))
#define BLUE_COMPONENT(x)  (guint16) ( (((x)        & 0xff) * 65535 / 255))

static gboolean read_users_filters(GSList **cfl);

/* the currently active filters */
static GSList *color_filter_list = NULL;

/* keep "old" deleted filters in this list until
 * the dissection no longer needs them (e.g. file is closed) */
static GSList *color_filter_deleted_list = NULL;
static GSList *color_filter_valid_list = NULL;

/* Color Filters can en-/disabled. */
gboolean filters_enabled = TRUE;

/* Remember if there are temporary coloring filters set to
 * add sensitivity to the "Reset Coloring 1-10" menu item
 */
gboolean tmp_colors_set = FALSE;

/* Create a new filter */
color_filter_t *
00074 color_filter_new(const gchar *name,    /* The name of the filter to create */
                 const gchar *filter_string, /* The string representing the filter */
                 color_t *bg_color,    /* The background color */
                 color_t *fg_color,    /* The foreground color */
                 gboolean disabled)     /* Is the filter disabled? */
{
      color_filter_t *colorf;

      colorf = (color_filter_t *)g_malloc(sizeof (color_filter_t));
      colorf->filter_name = g_strdup(name);
      colorf->filter_text = g_strdup(filter_string);
      colorf->bg_color = *bg_color;
      colorf->fg_color = *fg_color;
      colorf->disabled = disabled;
      colorf->c_colorfilter = NULL;
      colorf->edit_dialog = NULL;
      colorf->selected = FALSE;
        return colorf;
}

/* Add ten empty (temporary) colorfilters for easy coloring */
static void
color_filters_add_tmp(GSList **cfl)
{
      gchar  *name = NULL;
      guint32 i;
        gchar** bg_colors;
        gchar** fg_colors;
        unsigned long int cval;
        color_t bg_color, fg_color;
        color_filter_t *colorf;

      g_assert(strlen(prefs.gui_colorized_fg)==69);
      g_assert(strlen(prefs.gui_colorized_bg)==69);
        fg_colors = g_strsplit(prefs.gui_colorized_fg, ",", -1);
        bg_colors = g_strsplit(prefs.gui_colorized_bg, ",", -1);

        for ( i=1 ; i<=10 ; i++ ) {
                name = g_strdup_printf("%s%02d",TEMP_COLOR_PREFIX,i);

            /* retrieve background and foreground colors */
                cval = strtoul(fg_colors[i-1], NULL, 16);
                initialize_color(&fg_color, RED_COMPONENT(cval),
                                            GREEN_COMPONENT(cval),
                                            BLUE_COMPONENT(cval) );
                cval = strtoul(bg_colors[i-1], NULL, 16);
                initialize_color(&bg_color, RED_COMPONENT(cval),
                                            GREEN_COMPONENT(cval),
                                            BLUE_COMPONENT(cval) );
                colorf = color_filter_new(name, NULL, &bg_color, &fg_color, TRUE);
                colorf->filter_text = g_strdup("frame");
                colorf->c_colorfilter = NULL;
                *cfl = g_slist_append(*cfl, colorf);

                g_free(name);
      }

        g_strfreev(fg_colors);
        g_strfreev(bg_colors);

      return;
}

static gint
color_filters_find_by_name_cb(gconstpointer arg1, gconstpointer arg2)
{
        const color_filter_t *colorf = (const color_filter_t *)arg1;
        const gchar          *name   = (const gchar *)arg2;

        return (strstr(colorf->filter_name, name)==NULL) ? -1 : 0 ;
}


/* Set the filter off a temporary colorfilters and enable it */
void
00149 color_filters_set_tmp(guint8 filt_nr, gchar *filter, gboolean disabled)
{
      gchar          *name = NULL;
      const gchar    *tmpfilter = NULL;
        GSList         *cfl;
        color_filter_t *colorf;
        dfilter_t      *compiled_filter;
      guint8         i;

        /* Go through the tomporary filters and look for the same filter string.
         * If found, clear it so that a filter can be "moved" up and down the list
         */
        for ( i=1 ; i<=10 ; i++ ) {
                /* If we need to reset the temporary filter (filter==NULL), don't look
                 * for other rules with the same filter string
                 */
                if( i!=filt_nr && filter==NULL )
                        continue;

                name = g_strdup_printf("%s%02d",TEMP_COLOR_PREFIX,i);
                cfl = g_slist_find_custom(color_filter_list, (gpointer *) name, color_filters_find_by_name_cb);
                colorf = (color_filter_t *)cfl->data;

                /* Only change the filter rule if this is the rule to change or if
                 * a matching filter string has been found
                 */
                if(colorf && ( (i==filt_nr) || (strstr(filter,colorf->filter_text)!=NULL) ) ) {
                        /* set filter string to "frame" if we are resetting the rules
                         * or if we found a matching filter string which need to be cleared
                         */
                        tmpfilter = ( (filter==NULL) || (i!=filt_nr) ) ? "frame" : filter;
                        if (!dfilter_compile(tmpfilter, &compiled_filter)) {
                                simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                                    "Could not compile color filter name: \"%s\""
                                    " text: \"%s\".\n%s", name, filter, dfilter_error_msg);
                        } else {
                                if (colorf->filter_text != NULL)
                                        g_free(colorf->filter_text);
                                if (colorf->c_colorfilter != NULL)
                                        dfilter_free(colorf->c_colorfilter);
                                colorf->filter_text = g_strdup(tmpfilter);
                                colorf->c_colorfilter = compiled_filter;
                                colorf->disabled = ((i!=filt_nr) ? TRUE : disabled);
                                /* Remember that there are now temporary coloring filters set */
                                if( filter )
                                        tmp_colors_set = TRUE;
                        }
                }
                g_free(name);
        }
        return;
}

/* Reset the temporary colorfilters */
void
00204 color_filters_reset_tmp()
{
      guint8 i;

        for ( i=1 ; i<=10 ; i++ ) {
            color_filters_set_tmp(i, NULL, TRUE);
        }
        /* Remember that there are now *no* temporary coloring filters set */
        tmp_colors_set = FALSE;
      return;
}

/* delete the specified filter */
void
00218 color_filter_delete(color_filter_t *colorf)
{
      if (colorf->filter_name != NULL)
            g_free(colorf->filter_name);
      if (colorf->filter_text != NULL)
            g_free(colorf->filter_text);
      if (colorf->c_colorfilter != NULL)
            dfilter_free(colorf->c_colorfilter);
      g_free(colorf);
}

/* delete the specified filter (called from g_slist_foreach) */
static void
color_filter_delete_cb(gpointer filter_arg, gpointer unused _U_)
{
      color_filter_t *colorf = (color_filter_t *)filter_arg;

      color_filter_delete(colorf);
}

/* delete the specified list */
void
00240 color_filter_list_delete(GSList **cfl)
{
        g_slist_foreach(*cfl, color_filter_delete_cb, NULL);
        g_slist_free(*cfl);
        *cfl = NULL;
}

/* clone a single list entries from normal to edit list */
static color_filter_t *
color_filter_clone(color_filter_t *colorf)
{
      color_filter_t *new_colorf;

      new_colorf = (color_filter_t *)g_malloc(sizeof (color_filter_t));
      new_colorf->filter_name = g_strdup(colorf->filter_name);
      new_colorf->filter_text = g_strdup(colorf->filter_text);
      new_colorf->bg_color = colorf->bg_color;
      new_colorf->fg_color = colorf->fg_color;
      new_colorf->disabled = colorf->disabled;
      new_colorf->c_colorfilter = NULL;
      new_colorf->edit_dialog = NULL;
      new_colorf->selected = FALSE;

        return new_colorf;
}

static void
color_filter_list_clone_cb(gpointer filter_arg, gpointer cfl_arg)
{
    GSList **cfl = (GSList **)cfl_arg;
    color_filter_t *new_colorf;

    new_colorf = color_filter_clone((color_filter_t *)filter_arg);
    *cfl = g_slist_append(*cfl, new_colorf);
}

/* clone the specified list */
static GSList *
color_filter_list_clone(GSList *cfl)
{
        GSList *new_list = NULL;

        g_slist_foreach(cfl, color_filter_list_clone_cb, &new_list);

        return new_list;
}

/* Initialize the filter structures (reading from file) for general running, including app startup */
void
00289 color_filters_init(void)
{
      /* delete all currently existing filters */
      color_filter_list_delete(&color_filter_list);

      /* start the list with the temporary colorizing rules */
      color_filters_add_tmp(&color_filter_list);

      /* try to read the users filters */
      if (!read_users_filters(&color_filter_list))
            /* if that failed, try to read the global filters */
            color_filters_read_globals(&color_filter_list);
}

void
00304 color_filters_reload(void)
{
        /* "move" old entries to the deleted list
         * we must keep them until the dissection no longer needs them */
        color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
        color_filter_list = NULL;

        /* start the list with the temporary colorizing rules */
        color_filters_add_tmp(&color_filter_list);

      /* try to read the users filters */
      if (!read_users_filters(&color_filter_list))
            /* if that failed, try to read the global filters */
            color_filters_read_globals(&color_filter_list);
}

void
00321 color_filters_cleanup(void)
{
        /* delete the previously deleted filters */
        color_filter_list_delete(&color_filter_deleted_list);
}

static void
color_filters_clone_cb(gpointer filter_arg, gpointer user_data)
{
      color_filter_t * new_colorf = color_filter_clone((color_filter_t *)filter_arg);
        color_filter_add_cb (new_colorf, user_data);
}

void
00335 color_filters_clone(gpointer user_data)
{
    g_slist_foreach(color_filter_list, color_filters_clone_cb, user_data);
}


static void
color_filter_compile_cb(gpointer filter_arg, gpointer unused _U_)
{
      color_filter_t *colorf = (color_filter_t *)filter_arg;

      g_assert(colorf->c_colorfilter == NULL);
      if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter)) {
            simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
            "Could not compile color filter name: \"%s\" text: \"%s\".\n%s",
                        colorf->filter_name, colorf->filter_text, dfilter_error_msg);
            /* this filter was compilable before, so this should never happen */
            /* except if the OK button of the parent window has been clicked */
            /* so don't use g_assert_not_reached() but check the filters again */
      }
}

static void
color_filter_validate_cb(gpointer filter_arg, gpointer unused _U_)
{
      color_filter_t *colorf = (color_filter_t *)filter_arg;

      g_assert(colorf->c_colorfilter == NULL);
      if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter)) {
            simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
            "Removing color filter name: \"%s\" text: \"%s\".\n%s",
                        colorf->filter_name, colorf->filter_text, dfilter_error_msg);
            /* Delete the color filter from the list of color filters. */
            color_filter_valid_list = g_slist_remove(color_filter_valid_list, colorf);
            color_filter_delete(colorf);
      }
}

/* apply changes from the edit list */
void
00375 color_filters_apply(GSList *tmp_cfl, GSList *edit_cfl)
{
        /* "move" old entries to the deleted list
         * we must keep them until the dissection no longer needs them */
        color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
        color_filter_list = NULL;

        /* clone all list entries from tmp/edit to normal list */
        color_filter_valid_list = NULL;
        color_filter_valid_list = color_filter_list_clone(tmp_cfl);
        color_filter_valid_list = g_slist_concat(color_filter_valid_list,
                                                 color_filter_list_clone(edit_cfl) );

        /* compile all filter */
        g_slist_foreach(color_filter_valid_list, color_filter_validate_cb, NULL);

        /* clone all list entries from tmp/edit to normal list */
        color_filter_list = color_filter_list_clone(color_filter_valid_list);

        /* compile all filter */
        g_slist_foreach(color_filter_list, color_filter_compile_cb, NULL);
}

gboolean
00399 color_filters_used(void)
{
        return color_filter_list != NULL && filters_enabled;
}

gboolean
00405 tmp_color_filters_used(void)
{
        return tmp_colors_set;
}

void
00411 color_filters_enable(gboolean enable)
{
#ifdef NEW_PACKET_LIST
      new_packet_list_enable_color(enable);
#else
        filters_enabled = enable;
#endif
}


/* prepare the epan_dissect_t for the filter */
static void
prime_edt(gpointer data, gpointer user_data)
{
      color_filter_t  *colorf = (color_filter_t *)data;
      epan_dissect_t   *edt = (epan_dissect_t *)user_data;

      if (colorf->c_colorfilter != NULL)
            epan_dissect_prime_dfilter(edt, colorf->c_colorfilter);
}

/* Prime the epan_dissect_t with all the compiler
 * color filters in 'color_filter_list'. */
void
color_filters_prime_edt(epan_dissect_t *edt)
{
      if (color_filters_used())
            g_slist_foreach(color_filter_list, prime_edt, edt);
}

/* Colorize a single packet of the packet list (old packet list)
 *
 * Return the color_t for later use (new packet list) */
const color_filter_t *
#ifdef NEW_PACKET_LIST
color_filters_colorize_packet(epan_dissect_t *edt)
#else
00448 color_filters_colorize_packet(gint row, epan_dissect_t *edt)
#endif
{
    GSList *curr;
    color_filter_t *colorf;

    /* If we have color filters, "search" for the matching one. */
    if (color_filters_used()) {
        curr = color_filter_list;

        while(curr != NULL) {
            colorf = (color_filter_t *)curr->data;
            if ( (!colorf->disabled) &&
                 (colorf->c_colorfilter != NULL) &&
                 dfilter_apply_edt(colorf->c_colorfilter, edt)) {
                    /* this is the filter to use, apply it to the packet list */
#ifndef NEW_PACKET_LIST
                /* We'll do this in the column cell function instead. */
                    packet_list_set_colors(row, &(colorf->fg_color), &(colorf->bg_color));
#endif
                    return colorf;
            }
            curr = g_slist_next(curr);
        }
    }

    return NULL;
}

/* read filters from the given file */
/* XXX - Would it make more sense to use GStrings here instead of reallocing
   our buffers? */
static gboolean
read_filters_file(FILE *f, gpointer user_data)
{
#define INIT_BUF_SIZE 128
      gchar  *name = NULL;
      gchar  *filter_exp = NULL;
      guint32 name_len = INIT_BUF_SIZE;
      guint32 filter_exp_len = INIT_BUF_SIZE;
      guint32 i = 0;
      gint32  c;
      guint16 fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
      gboolean disabled = FALSE;
      gboolean skip_end_of_line = FALSE;

      name = (gchar *)g_malloc(name_len + 1);
      filter_exp = (gchar *)g_malloc(filter_exp_len + 1);

      while (1) {

            if (skip_end_of_line) {
                  do {
                        c = getc(f);
                  } while (c != EOF && c != '\n');
                  if (c == EOF)
                        break;
                  disabled = FALSE;
                  skip_end_of_line = FALSE;
            }

            while ((c = getc(f)) != EOF && isspace(c)) {
                  if (c == '\n') {
                        continue;
                  }
            }

            if (c == EOF)
                  break;

            if (c == '!') {
                  disabled = TRUE;
                  continue;
            }

            /* skip # comments and invalid lines */
            if (c != '@') {
                  skip_end_of_line = TRUE;
                  continue;
            }

            /* we get the @ delimiter.
             * Format is:
             * @name@filter expression@[background r,g,b][foreground r,g,b]
             */

            /* retrieve name */
            i = 0;
            while (1) {
                  c = getc(f);
                  if (c == EOF || c == '@')
                        break;
                  if (i >= name_len) {
                        /* buffer isn't long enough; double its length.*/
                        name_len *= 2;
                        name = (gchar *)g_realloc(name, name_len + 1);
                  }
                  name[i++] = c;
            }
            name[i] = '\0';

            if (c == EOF) {
                  break;
            } else if (i == 0) {
                  skip_end_of_line = TRUE;
                  continue;
            }

            /* retrieve filter expression */
            i = 0;
            while (1) {
                  c = getc(f);
                  if (c == EOF || c == '@')
                        break;
                  if (i >= filter_exp_len) {
                        /* buffer isn't long enough; double its length.*/
                        filter_exp_len *= 2;
                        filter_exp = (gchar *)g_realloc(filter_exp, filter_exp_len + 1);
                  }
                  filter_exp[i++] = c;
            }
            filter_exp[i] = '\0';

            if (c == EOF) {
                  break;
            } else if (i == 0) {
                  skip_end_of_line = TRUE;
                  continue;
            }

            /* retrieve background and foreground colors */
            if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
                  &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {

                  /* we got a complete color filter */

                  color_t bg_color, fg_color;
                  color_filter_t *colorf;
                  dfilter_t *temp_dfilter;

                  if (!dfilter_compile(filter_exp, &temp_dfilter)) {
                        simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                        "Could not compile color filter %s from saved filters.\n%s",
                                    name, dfilter_error_msg);
                        skip_end_of_line = TRUE;
                        continue;
                  }

                  if (!initialize_color(&fg_color, fg_r, fg_g, fg_b)) {
                        /* oops */
                        simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                            "Could not allocate foreground color "
                            "specified in input file for %s.", name);
                        dfilter_free(temp_dfilter);
                        skip_end_of_line = TRUE;
                        continue;
                  }
                  if (!initialize_color(&bg_color, bg_r, bg_g, bg_b)) {
                        /* oops */
                        simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                            "Could not allocate background color "
                            "specified in input file for %s.", name);
                        dfilter_free(temp_dfilter);
                        skip_end_of_line = TRUE;
                        continue;
                  }

                  colorf = color_filter_new(name, filter_exp, &bg_color,
                      &fg_color, disabled);
                        if(user_data == &color_filter_list) {
                                GSList **cfl = (GSList **)user_data;

                                /* internal call */
                        colorf->c_colorfilter = temp_dfilter;
                                *cfl = g_slist_append(*cfl, colorf);
                        } else {
                                /* external call */
                        /* just editing, don't need the compiled filter */
                        dfilter_free(temp_dfilter);
                        color_filter_add_cb (colorf, user_data);
                        }
            }    /* if sscanf */

            skip_end_of_line = TRUE;
      }

      g_free(name);
      g_free(filter_exp);
      return TRUE;
}

/* read filters from the user's filter file */
static gboolean
read_users_filters(GSList **cfl)
{
      gchar *path;
      FILE *f;
      gboolean ret;

      /* decide what file to open (from dfilter code) */
      path = get_persconffile_path("colorfilters", TRUE, FALSE);
      if ((f = ws_fopen(path, "r")) == NULL) {
            if (errno != ENOENT) {
                  simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                      "Could not open filter file\n\"%s\": %s.", path,
                      strerror(errno));
            }
            g_free(path);
            return FALSE;
      }
      g_free(path);
      path = NULL;

      ret = read_filters_file(f, cfl);
      fclose(f);
      return ret;
}

/* read filters from the filter file */
gboolean
00668 color_filters_read_globals(gpointer user_data)
{
      gchar *path;
      FILE *f;
      gboolean ret;

      /* decide what file to open (from dfilter code) */
      path = get_datafile_path("colorfilters");
      if ((f = ws_fopen(path, "r")) == NULL) {
            if (errno != ENOENT) {
                  simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                      "Could not open global filter file\n\"%s\": %s.", path,
                      strerror(errno));
            }
            g_free(path);
            return FALSE;
      }
      g_free(path);
      path = NULL;

      ret = read_filters_file(f, user_data);
      fclose(f);
      return ret;
}

/* read filters from some other filter file (import) */
gboolean
00695 color_filters_import(gchar *path, gpointer user_data)
{
      FILE *f;
      gboolean ret;

      if ((f = ws_fopen(path, "r")) == NULL) {
            simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                "Could not open\n%s\nfor reading: %s.",
                path, strerror(errno));
            return FALSE;
      }

      ret = read_filters_file(f, user_data);
      fclose(f);
      return ret;
}

struct write_filter_data
{
  FILE * f;
  gboolean only_selected;
};

/* save a single filter */
static void
write_filter(gpointer filter_arg, gpointer data_arg)
{
      struct write_filter_data *data = (struct write_filter_data *)data_arg;
      color_filter_t *colorf = (color_filter_t *)filter_arg;
      FILE *f = data->f;

      if ( (colorf->selected || !data->only_selected) &&
             (strstr(colorf->filter_name,TEMP_COLOR_PREFIX)==NULL) ) {
            fprintf(f,"%s@%s@%s@[%d,%d,%d][%d,%d,%d]\n",
                colorf->disabled ? "!" : "",
                colorf->filter_name,
                colorf->filter_text,
                colorf->bg_color.red,
                colorf->bg_color.green,
                colorf->bg_color.blue,
                colorf->fg_color.red,
                colorf->fg_color.green,
                colorf->fg_color.blue);
      }
}

/* save filters in a filter file */
static gboolean
write_filters_file(GSList *cfl, FILE *f, gboolean only_selected)
{
      struct write_filter_data data;

      data.f = f;
      data.only_selected = only_selected;

      fprintf(f,"# DO NOT EDIT THIS FILE!  It was created by Wireshark\n");
        g_slist_foreach(cfl, write_filter, &data);
      return TRUE;
}

/* save filters in users filter file */
gboolean
00757 color_filters_write(GSList *cfl)
{
      gchar *pf_dir_path;
      gchar *path;
      FILE *f;

      /* Create the directory that holds personal configuration files,
         if necessary.  */
      if (create_persconffile_dir(&pf_dir_path) == -1) {
            simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                "Can't create directory\n\"%s\"\nfor color files: %s.",
                pf_dir_path, strerror(errno));
            g_free(pf_dir_path);
            return FALSE;
      }

      path = get_persconffile_path("colorfilters", TRUE, TRUE);
      if ((f = ws_fopen(path, "w+")) == NULL) {
            simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                "Could not open\n%s\nfor writing: %s.",
                path, strerror(errno));
            g_free(path);
            return FALSE;
      }
      g_free(path);
      write_filters_file(cfl, f, FALSE);
      fclose(f);
      return TRUE;
}

/* save filters in some other filter file (export) */
gboolean
00789 color_filters_export(gchar *path, GSList *cfl, gboolean only_marked)
{
      FILE *f;

      if ((f = ws_fopen(path, "w+")) == NULL) {
            simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
                "Could not open\n%s\nfor writing: %s.",
                path, strerror(errno));
            return FALSE;
      }
      write_filters_file(cfl, f, only_marked);
      fclose(f);
      return TRUE;
}


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