[andy/viking.git] / src / file.c

/*
 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
 *
 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
 *
 * 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
 *
 */

#include "viking.h"

#include "gpx.h"

#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include <glib/gstdio.h>

#define TEST_BOOLEAN(str) (! ((str)[0] == '\0' || (str)[0] == '0' || (str)[0] == 'n' || (str)[0] == 'N' || (str)[0] == 'f' || (str)[0] == 'F') )
#define VIK_MAGIC "#VIK"
#define GPX_MAGIC "<?xm"
#define VIK_MAGIC_LEN 4

#ifdef WINDOWS
#define FILE_SEP '\\'
#else
#define FILE_SEP '/'
#endif

typedef struct _Stack Stack;

struct _Stack {
  Stack *under;
  gpointer *data;
};

static void pop(Stack **stack) {
  Stack *tmp = (*stack)->under;
  g_free ( *stack );
  *stack = tmp;
}

static void push(Stack **stack)
{
  Stack *tmp = g_malloc ( sizeof ( Stack ) );
  tmp->under = *stack;
  *stack = tmp;
}

static gboolean check_magic ( FILE *f, const gchar *magic_number )
{
  gchar magic[VIK_MAGIC_LEN];
  gboolean rv = FALSE;
  gint8 i;
  if ( fread(magic, 1, sizeof(magic), f) == sizeof(magic) &&
      strncmp(magic, magic_number, sizeof(magic)) == 0 )
    rv = TRUE;
  for ( i = sizeof(magic)-1; i >= 0; i-- ) /* the ol' pushback */
    ungetc(magic[i],f);
  return rv;
}


static gboolean str_starts_with ( const gchar *haystack, const gchar *needle, guint16 len_needle, gboolean must_be_longer )
{
  if ( strlen(haystack) > len_needle - (!must_be_longer) && strncasecmp ( haystack, needle, len_needle ) == 0 )
    return TRUE;
  return FALSE;
}

static guint16 layer_type_from_string ( const gchar *str )
{
  guint8 i;
  for ( i = 0; i < VIK_LAYER_NUM_TYPES; i++ )
    if ( strcasecmp ( str, vik_layer_get_interface(i)->name ) == 0 )
      return i;
  return -1;
}

static void write_layer_params_and_data ( VikLayer *l, FILE *f )
{
  VikLayerParam *params = vik_layer_get_interface(l->type)->params;
  VikLayerFuncGetParam get_param = vik_layer_get_interface(l->type)->get_param;

  fprintf ( f, "name=%s\n", l->name ? l->name : "" );
  if ( !l->visible )
    fprintf ( f, "visible=f\n" );

  if ( params && get_param )
  {
    VikLayerParamData data;
    guint16 i, params_count = vik_layer_get_interface(l->type)->params_count;
    for ( i = 0; i < params_count; i++ )
    {
      data = get_param(l,i);
      fprintf ( f, "%s=", params[i].name );
      switch ( params[i].type )
      {
        case VIK_LAYER_PARAM_DOUBLE: {
//          char buf[15]; /* locale independent */
//          fprintf ( f, "%s\n", (char *) g_dtostr (data.d, buf, sizeof (buf)) ); break;
            fprintf ( f, "%f\n", data.d );
            break;
       }
        case VIK_LAYER_PARAM_UINT: fprintf ( f, "%d\n", data.u ); break;
        case VIK_LAYER_PARAM_INT: fprintf ( f, "%d\n", data.i ); break;
        case VIK_LAYER_PARAM_BOOLEAN: fprintf ( f, "%c\n", data.b ? 't' : 'f' ); break;
        case VIK_LAYER_PARAM_STRING: fprintf ( f, "%s\n", data.s ); break;
        case VIK_LAYER_PARAM_COLOR: fprintf ( f, "#%.2x%.2x%.2x\n", (int)(data.c.red/256),(int)(data.c.green/256),(int)(data.c.blue/256)); break;
      }
    }
  }
  if ( vik_layer_get_interface(l->type)->write_file_data )
  {
    fprintf ( f, "\n\n~LayerData\n" );
    vik_layer_get_interface(l->type)->write_file_data ( l, f );
    fprintf ( f, "~EndLayerData\n" );
  }
  /* foreach param:
     write param, and get_value, etc.
     then run layer data, and that's it.
  */
}

static void file_write ( VikAggregateLayer *top, FILE *f, gpointer vp )
{
  Stack *stack = NULL;
  VikLayer *current_layer;
  struct LatLon ll;
  gchar *modestring;

  push(&stack);
  stack->data = (gpointer) vik_aggregate_layer_get_children(VIK_AGGREGATE_LAYER(top));
  stack->under = NULL;

  /* crazhy CRAZHY */
  vik_coord_to_latlon ( vik_viewport_get_center ( VIK_VIEWPORT(vp) ), &ll );

  switch ( vik_viewport_get_drawmode ( VIK_VIEWPORT(vp) ) ) {
    case VIK_VIEWPORT_DRAWMODE_UTM: modestring = "utm"; break;
    case VIK_VIEWPORT_DRAWMODE_EXPEDIA: modestring = "expedia"; break;
    case VIK_VIEWPORT_DRAWMODE_GOOGLE: modestring = "google"; break;
    case VIK_VIEWPORT_DRAWMODE_KH: modestring = "kh"; break;
    default: modestring = "mercator";
  }

  fprintf ( f, "#VIKING GPS Data file " VIKING_URL "\n\nxmpp=%f\nympp=%f\nlat=%f\nlon=%f\nmode=%s\ncolor=%s\ndrawscale=%s\ndrawcentermark=%s",
      vik_viewport_get_xmpp ( VIK_VIEWPORT(vp) ), vik_viewport_get_ympp ( VIK_VIEWPORT(vp) ), ll.lat, ll.lon,
      modestring, vik_viewport_get_background_color(VIK_VIEWPORT(vp)),
      vik_viewport_get_draw_scale(VIK_VIEWPORT(vp)) ? "t" : "f",
      vik_viewport_get_draw_centermark(VIK_VIEWPORT(vp)) ? "t" : "f" );

  if ( ! VIK_LAYER(top)->visible )
    fprintf ( f, "visible=f\n" );

  while (stack && stack->data)
  {
    current_layer = VIK_LAYER(((GList *)stack->data)->data);
    fprintf ( f, "\n~Layer %s\n", vik_layer_get_interface(current_layer->type)->name );
    write_layer_params_and_data ( current_layer, f );
    if ( current_layer->type == VIK_LAYER_AGGREGATE && !vik_aggregate_layer_is_empty(VIK_AGGREGATE_LAYER(current_layer)) )
    {
      push(&stack);
      stack->data = (gpointer) vik_aggregate_layer_get_children(VIK_AGGREGATE_LAYER(current_layer));
    }
    else if ( current_layer->type == VIK_LAYER_GPS && !vik_gps_layer_is_empty(VIK_GPS_LAYER(current_layer)) )
    {
      push(&stack);
      stack->data = (gpointer) vik_gps_layer_get_children(VIK_GPS_LAYER(current_layer));
    }
    else
    {
      stack->data = (gpointer) ((GList *)stack->data)->next;
      fprintf ( f, "~EndLayer\n\n" );
      while ( stack && (!stack->data) )
      {
        pop(&stack);
        if ( stack )
        {
          stack->data = (gpointer) ((GList *)stack->data)->next;
          fprintf ( f, "~EndLayer\n\n" );
        }
      }
    }
  }
/*
  get vikaggregatelayer's children (?)
  foreach write ALL params,
  then layer data (IF function exists)
  then endlayer

  impl:
  stack of layers (LIST) we are working on
  when layer->next == NULL ...
  we move on.
*/
}

static void file_read ( VikAggregateLayer *top, FILE *f, gpointer vp )
{
  Stack *stack;
  struct LatLon ll = { 0.0, 0.0 };
  gchar buffer[4096];
  gchar *line;
  guint16 len;
  long line_num = 0;

  VikLayerParam *params = NULL; /* for current layer, so we don't have to keep on looking up interface */
  guint8 params_count = 0;

  push(&stack);
  stack->under = NULL;
  stack->data = (gpointer) top;

  while ( fgets ( buffer, 4096, f ) )
  {
    line_num++;

    line = buffer;
    while ( *line == ' ' || *line =='\t' )
      line++;

    if ( line[0] == '#' )
      continue;
    

    len = strlen(line);
    if ( len > 0 && line[len-1] == '\n' )
      line[--len] = '\0';
    if ( len > 0 && line[len-1] == '\r' )
      line[--len] = '\0';

    if ( len == 0 )
      continue;


    if ( line[0] == '~' )
    {
      line++; len--;
      if ( *line == '\0' )
        continue;
      else if ( str_starts_with ( line, "Layer ", 6, TRUE ) )
      {
        int parent_type = VIK_LAYER(stack->data)->type;
        if ( ( ! stack->data ) || ((parent_type != VIK_LAYER_AGGREGATE) && (parent_type != VIK_LAYER_GPS)) )
        {
          g_warning ( "Line %ld: Layer command inside non-Aggregate Layer (type %d)", line_num, parent_type );
          push(&stack); /* inside INVALID layer */
          stack->data = NULL;
          continue;
        }
        else
        {
          gint16 type = layer_type_from_string ( line+6 );
          push(&stack);
          if ( type == -1 )
          {
            g_warning ( "Line %ld: Unknown type %s\n", line_num, line+6 );
            stack->data = NULL;
          }
          else if (parent_type == VIK_LAYER_GPS)
          {
            stack->data = (gpointer) vik_gps_layer_get_a_child(VIK_GPS_LAYER(stack->under->data));
            params = vik_layer_get_interface(type)->params;
            params_count = vik_layer_get_interface(type)->params_count;
          }
          else
          {
            stack->data = (gpointer) vik_layer_create ( type, vp, NULL, FALSE );
            params = vik_layer_get_interface(type)->params;
            params_count = vik_layer_get_interface(type)->params_count;
          }
        }
      }
      else if ( str_starts_with ( line, "EndLayer", 8, FALSE ) )
      {
        if ( stack->under == NULL )
          g_warning ( "Line %ld: Mismatched ~EndLayer command", line_num );
        else
        {
          if ( stack->data && stack->under->data )
          {
            if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_AGGREGATE) {
              vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data) );
              vik_layer_post_read ( VIK_LAYER(stack->data), vp );
            }
            else if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_GPS) {
              /* TODO: anything else needs to be done here ? */
            }
            else
              g_warning ( "Line %ld: EndLayer command inside non-Aggregate Layer (type %d)", line_num, VIK_LAYER(stack->data)->type );
          }
          pop(&stack);
        }
      }
      else if ( str_starts_with ( line, "LayerData", 9, FALSE ) )
      {
        if ( stack->data && vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data )
          vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data ( VIK_LAYER(stack->data), f );
          /* must read until hits ~EndLayerData */

        else
        { /* simply skip layer data over */
          while ( fgets ( buffer, 4096, f ) )
          {
            line_num++;

            line = buffer;

            len = strlen(line);
            if ( len > 0 && line[len-1] == '\n' )
              line[--len] = '\0';
            if ( len > 0 && line[len-1] == '\r' )
              line[--len] = '\0';
            if ( strcasecmp ( line, "~EndLayerData" ) == 0 )
              break;
          }
          continue;
        }
      }
      else
      {
        g_warning ( "Line %ld: Unknown tilde command", line_num );
      }
    }
    else
    {
      gint32 eq_pos = -1;
      guint16 i;
      if ( ! stack->data )
        continue;

      for ( i = 0; i < len; i++ )
        if ( line[i] == '=' )
          eq_pos = i;

      if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "xmpp", eq_pos ) == 0) /* "hard coded" params: global & for all layer-types */
        vik_viewport_set_xmpp ( VIK_VIEWPORT(vp), strtod ( line+5, NULL ) );
      else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "ympp", eq_pos ) == 0)
        vik_viewport_set_ympp ( VIK_VIEWPORT(vp), strtod ( line+5, NULL ) );
      else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lat", eq_pos ) == 0 )
        ll.lat = strtod ( line+4, NULL );
      else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lon", eq_pos ) == 0 )
        ll.lon = strtod ( line+4, NULL );
      else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "utm" ) == 0)
        vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_UTM);
      else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "expedia" ) == 0)
        vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_EXPEDIA );
      else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "google" ) == 0)
        vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_GOOGLE );
      else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "kh" ) == 0)
        vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_KH );
      else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "mercator" ) == 0)
        vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_MERCATOR );
      else if ( stack->under == NULL && eq_pos == 5 && strncasecmp ( line, "color", eq_pos ) == 0 )
        vik_viewport_set_background_color ( VIK_VIEWPORT(vp), line+6 );
      else if ( stack->under == NULL && eq_pos == 9 && strncasecmp ( line, "drawscale", eq_pos ) == 0 )
        vik_viewport_set_draw_scale ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+10) );
      else if ( stack->under == NULL && eq_pos == 14 && strncasecmp ( line, "drawcentermark", eq_pos ) == 0 )
        vik_viewport_set_draw_centermark ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+15) );
      else if ( stack->under && eq_pos == 4 && strncasecmp ( line, "name", eq_pos ) == 0 )
        vik_layer_rename ( VIK_LAYER(stack->data), line+5 );
      else if ( eq_pos == 7 && strncasecmp ( line, "visible", eq_pos ) == 0 )
        VIK_LAYER(stack->data)->visible = TEST_BOOLEAN(line+8);
      else if ( eq_pos != -1 && stack->under )
      {
        gboolean found_match = FALSE;
        /* go thru layer params. if len == eq_pos && starts_with jazz, set it. */
        /* also got to check for name and visible. */

        if ( ! params )
        {
          g_warning ( "Line %ld: No options for this kind of layer", line_num );
          continue;
        }

        for ( i = 0; i < params_count; i++ )
          if ( strlen(params[i].name) == eq_pos && strncasecmp ( line, params[i].name, eq_pos ) == 0 )
          {
            VikLayerParamData x;
            line += eq_pos+1;
            switch ( params[i].type )
            {
              case VIK_LAYER_PARAM_DOUBLE: x.d = strtod(line, NULL); break;
              case VIK_LAYER_PARAM_UINT: x.u = strtoul(line, NULL, 10); break;
              case VIK_LAYER_PARAM_INT: x.i = strtol(line, NULL, 10); break;
              case VIK_LAYER_PARAM_BOOLEAN: x.b = TEST_BOOLEAN(line); break;
              case VIK_LAYER_PARAM_COLOR: memset(&(x.c), 0, sizeof(x.c)); /* default: black */
                                          gdk_color_parse ( line, &(x.c) ); break;
              default: x.s = line;
            }
            vik_layer_set_param ( VIK_LAYER(stack->data), i, x, vp );
            found_match = TRUE;
            break;
          }
        if ( ! found_match )
          g_warning ( "Line %ld: Unknown parameter. Line:\n%s", line_num, line );
      }
      else
        g_warning ( "Line %ld: Invalid parameter or parameter outside of layer.", line_num );
    }
/* could be:
[Layer Type=Bla]
[EndLayer]
[LayerData]
name=this
#comment
*/
  }

  while ( stack )
  {
    if ( stack->under && stack->under->data && stack->data )
    {
      vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data) );
      vik_layer_post_read ( VIK_LAYER(stack->data), vp );
    }
    pop(&stack);
  }

  if ( ll.lat != 0.0 || ll.lon != 0.0 )
    vik_viewport_set_center_latlon ( VIK_VIEWPORT(vp), &ll );

  if ( ( ! VIK_LAYER(top)->visible ) && VIK_LAYER(top)->realized )
    vik_treeview_item_set_visible ( VIK_LAYER(top)->vt, &(VIK_LAYER(top)->iter), FALSE ); 
}

/*
read thru file
if "[Layer Type="
  push(&stack)
  new default layer of type (str_to_type) (check interface->name)
if "[EndLayer]"
  VikLayer *vl = stack->data;
  pop(&stack);
  vik_aggregate_layer_add_layer(stack->data, vl);
if "[LayerData]"
  vik_layer_data ( VIK_LAYER_DATA(stack->data), f, vp );

*/

/* ---------------------------------------------------- */

static FILE *xfopen ( const char *fn, const char *mode )
{
  if ( strcmp(fn,"-") == 0 )
    return stdin;
  else
    return fopen(fn, "r");
}

static void xfclose ( FILE *f )
{
  if ( f != stdin && f != stdout )
    fclose ( f );
}

/* 0 on failure, 1 on success (vik file) 2 on success (other file) */
gshort a_file_load ( VikAggregateLayer *top, gpointer vp, const gchar *filename )
{
  FILE *f = xfopen ( filename, "r" );

  g_assert ( vp );

  if ( ! f )
    return 0;

  if ( check_magic ( f, VIK_MAGIC ) )
  {
    file_read ( top, f, vp );
    if ( f != stdin )
      xfclose(f);
    return 1;
  }
  else
  {
    VikCoord new_center;
    VikLayer *vtl = vik_layer_create ( VIK_LAYER_TRW, vp, NULL, FALSE );
    vik_layer_rename ( vtl, a_file_basename ( filename ) );

    if ( check_magic ( f, GPX_MAGIC ) )
      a_gpx_read_file ( VIK_TRW_LAYER(vtl), f );
    else
     a_gpspoint_read_file ( VIK_TRW_LAYER(vtl), f );

    vik_layer_post_read ( vtl, vp );

    vik_aggregate_layer_add_layer ( top, vtl );

    if ( vik_trw_layer_find_center ( VIK_TRW_LAYER(vtl), &new_center ) )
      vik_viewport_set_center_coord ( VIK_VIEWPORT(vp), &new_center );
    xfclose(f);
    return 2;
  }
}

gboolean a_file_save ( VikAggregateLayer *top, gpointer vp, const gchar *filename )
{
  FILE *f = fopen(filename, "w");

  if ( ! f )
    return FALSE;

  file_write ( top, f, vp );

  fclose(f);

  return TRUE;
}


const gchar *a_file_basename ( const gchar *filename )
{
  const gchar *t = filename + strlen(filename) - 1;
  while ( --t > filename )
    if ( *(t-1) == FILE_SEP )
      break;
  if ( t >= filename )
    return t;
  return filename;
}

gboolean a_file_export ( VikTrwLayer *vtl, const gchar *filename, gshort file_type )
{
  FILE *f = fopen ( filename, "w" );
  if ( f )
  {
    if ( file_type == FILE_TYPE_GPSMAPPER )
      a_gpsmapper_write_file ( vtl, f );
    else if ( file_type == FILE_TYPE_GPX )
      a_gpx_write_file ( vtl, f );
    else
      a_gpspoint_write_file ( vtl, f );
    fclose ( f );
    return TRUE;
  }
  return FALSE;
}

const gchar *a_get_viking_dir()
{
  static gchar *viking_dir = NULL;

  if (!viking_dir) {
    gchar *temp[] = {"/tmp/vikXXXXXX"};
    gchar *home = getenv("HOME");
    if (!home || access(home, W_OK))
      home = mktemp(temp);
    viking_dir = g_strdup_printf("%s/%s", home, ".viking");
    if (access(viking_dir, F_OK))
      g_mkdir(viking_dir, 0755);
  }

  return viking_dir;
}
Commit	Line	Data
50a14534 EB	1	/*
	2	* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
	3	*
	4	* Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
	22	#include "viking.h"
	23
bf35388d EB	24	#include "gpx.h"
bf35388d EB	25
50a14534 EB	26	#include <string.h>
50a14534 EB	27	#include <stdlib.h>
d5728c65 GB	28	#include <glib.h>
d5728c65 GB	29	#include <glib/gstdio.h>
50a14534 EB	30
	31	#define TEST_BOOLEAN(str) (! ((str)[0] == '\0' \|\| (str)[0] == '0' \|\| (str)[0] == 'n' \|\| (str)[0] == 'N' \|\| (str)[0] == 'f' \|\| (str)[0] == 'F') )
	32	#define VIK_MAGIC "#VIK"
bf35388d	33	#define GPX_MAGIC "<?xm"
50a14534 EB	34	#define VIK_MAGIC_LEN 4
	35
	36	#ifdef WINDOWS
	37	#define FILE_SEP '\\'
	38	#else
	39	#define FILE_SEP '/'
	40	#endif
	41
	42	typedef struct _Stack Stack;
	43
	44	struct _Stack {
	45	Stack *under;
	46	gpointer *data;
	47	};
	48
	49	static void pop(Stack **stack) {
	50	Stack tmp = (stack)->under;
	51	g_free ( *stack );
	52	*stack = tmp;
	53	}
	54
	55	static void push(Stack **stack)
	56	{
	57	Stack *tmp = g_malloc ( sizeof ( Stack ) );
	58	tmp->under = *stack;
	59	*stack = tmp;
	60	}
	61
bf35388d	62	static gboolean check_magic ( FILE f, const gchar magic_number )
50a14534 EB	63	{
	64	gchar magic[VIK_MAGIC_LEN];
	65	gboolean rv = FALSE;
	66	gint8 i;
	67	if ( fread(magic, 1, sizeof(magic), f) == sizeof(magic) &&
bf35388d	68	strncmp(magic, magic_number, sizeof(magic)) == 0 )
50a14534 EB	69	rv = TRUE;
	70	for ( i = sizeof(magic)-1; i >= 0; i-- ) /* the ol' pushback */
	71	ungetc(magic[i],f);
	72	return rv;
	73	}
	74
	75
	76	static gboolean str_starts_with ( const gchar haystack, const gchar needle, guint16 len_needle, gboolean must_be_longer )
	77	{
	78	if ( strlen(haystack) > len_needle - (!must_be_longer) && strncasecmp ( haystack, needle, len_needle ) == 0 )
	79	return TRUE;
	80	return FALSE;
	81	}
	82
	83	static guint16 layer_type_from_string ( const gchar *str )
	84	{
	85	guint8 i;
	86	for ( i = 0; i < VIK_LAYER_NUM_TYPES; i++ )
	87	if ( strcasecmp ( str, vik_layer_get_interface(i)->name ) == 0 )
	88	return i;
	89	return -1;
	90	}
	91
	92	static void write_layer_params_and_data ( VikLayer l, FILE f )
	93	{
	94	VikLayerParam *params = vik_layer_get_interface(l->type)->params;
	95	VikLayerFuncGetParam get_param = vik_layer_get_interface(l->type)->get_param;
	96
e9d005c9	97	fprintf ( f, "name=%s\n", l->name ? l->name : "" );
50a14534 EB	98	if ( !l->visible )
	99	fprintf ( f, "visible=f\n" );
	100
	101	if ( params && get_param )
	102	{
	103	VikLayerParamData data;
	104	guint16 i, params_count = vik_layer_get_interface(l->type)->params_count;
	105	for ( i = 0; i < params_count; i++ )
	106	{
	107	data = get_param(l,i);
	108	fprintf ( f, "%s=", params[i].name );
	109	switch ( params[i].type )
	110	{
e9d005c9 EB	111	case VIK_LAYER_PARAM_DOUBLE: {
	112	// char buf[15]; /* locale independent */
	113	// fprintf ( f, "%s\n", (char *) g_dtostr (data.d, buf, sizeof (buf)) ); break;
	114	fprintf ( f, "%f\n", data.d );
7c1cf1b5	115	break;
e9d005c9	116	}
50a14534 EB	117	case VIK_LAYER_PARAM_UINT: fprintf ( f, "%d\n", data.u ); break;
	118	case VIK_LAYER_PARAM_INT: fprintf ( f, "%d\n", data.i ); break;
	119	case VIK_LAYER_PARAM_BOOLEAN: fprintf ( f, "%c\n", data.b ? 't' : 'f' ); break;
	120	case VIK_LAYER_PARAM_STRING: fprintf ( f, "%s\n", data.s ); break;
	121	case VIK_LAYER_PARAM_COLOR: fprintf ( f, "#%.2x%.2x%.2x\n", (int)(data.c.red/256),(int)(data.c.green/256),(int)(data.c.blue/256)); break;
	122	}
	123	}
	124	}
	125	if ( vik_layer_get_interface(l->type)->write_file_data )
	126	{
	127	fprintf ( f, "\n\n~LayerData\n" );
	128	vik_layer_get_interface(l->type)->write_file_data ( l, f );
	129	fprintf ( f, "~EndLayerData\n" );
	130	}
	131	/* foreach param:
	132	write param, and get_value, etc.
	133	then run layer data, and that's it.
	134	*/
	135	}
	136
	137	static void file_write ( VikAggregateLayer top, FILE f, gpointer vp )
	138	{
	139	Stack *stack = NULL;
	140	VikLayer *current_layer;
	141	struct LatLon ll;
	142	gchar *modestring;
	143
	144	push(&stack);
	145	stack->data = (gpointer) vik_aggregate_layer_get_children(VIK_AGGREGATE_LAYER(top));
	146	stack->under = NULL;
	147
	148	/* crazhy CRAZHY */
	149	vik_coord_to_latlon ( vik_viewport_get_center ( VIK_VIEWPORT(vp) ), &ll );
	150
	151	switch ( vik_viewport_get_drawmode ( VIK_VIEWPORT(vp) ) ) {
	152	case VIK_VIEWPORT_DRAWMODE_UTM: modestring = "utm"; break;
	153	case VIK_VIEWPORT_DRAWMODE_EXPEDIA: modestring = "expedia"; break;
	154	case VIK_VIEWPORT_DRAWMODE_GOOGLE: modestring = "google"; break;
	155	case VIK_VIEWPORT_DRAWMODE_KH: modestring = "kh"; break;
	156	default: modestring = "mercator";
	157	}
	158
c933487f	159	fprintf ( f, "#VIKING GPS Data file " VIKING_URL "\n\nxmpp=%f\nympp=%f\nlat=%f\nlon=%f\nmode=%s\ncolor=%s\ndrawscale=%s\ndrawcentermark=%s",
50a14534	160	vik_viewport_get_xmpp ( VIK_VIEWPORT(vp) ), vik_viewport_get_ympp ( VIK_VIEWPORT(vp) ), ll.lat, ll.lon,
35c7c0ba	161	modestring, vik_viewport_get_background_color(VIK_VIEWPORT(vp)),
c933487f QT	162	vik_viewport_get_draw_scale(VIK_VIEWPORT(vp)) ? "t" : "f",
c933487f QT	163	vik_viewport_get_draw_centermark(VIK_VIEWPORT(vp)) ? "t" : "f" );
50a14534 EB	164
	165	if ( ! VIK_LAYER(top)->visible )
	166	fprintf ( f, "visible=f\n" );
	167
	168	while (stack && stack->data)
	169	{
	170	current_layer = VIK_LAYER(((GList *)stack->data)->data);
	171	fprintf ( f, "\n~Layer %s\n", vik_layer_get_interface(current_layer->type)->name );
	172	write_layer_params_and_data ( current_layer, f );
	173	if ( current_layer->type == VIK_LAYER_AGGREGATE && !vik_aggregate_layer_is_empty(VIK_AGGREGATE_LAYER(current_layer)) )
	174	{
	175	push(&stack);
	176	stack->data = (gpointer) vik_aggregate_layer_get_children(VIK_AGGREGATE_LAYER(current_layer));
	177	}
f253a6a6	178	else if ( current_layer->type == VIK_LAYER_GPS && !vik_gps_layer_is_empty(VIK_GPS_LAYER(current_layer)) )
7886de28 QT	179	{
	180	push(&stack);
	181	stack->data = (gpointer) vik_gps_layer_get_children(VIK_GPS_LAYER(current_layer));
	182	}
50a14534 EB	183	else
	184	{
	185	stack->data = (gpointer) ((GList *)stack->data)->next;
	186	fprintf ( f, "~EndLayer\n\n" );
	187	while ( stack && (!stack->data) )
	188	{
	189	pop(&stack);
	190	if ( stack )
	191	{
	192	stack->data = (gpointer) ((GList *)stack->data)->next;
	193	fprintf ( f, "~EndLayer\n\n" );
	194	}
	195	}
	196	}
	197	}
	198	/*
	199	get vikaggregatelayer's children (?)
	200	foreach write ALL params,
	201	then layer data (IF function exists)
	202	then endlayer
	203
	204	impl:
	205	stack of layers (LIST) we are working on
	206	when layer->next == NULL ...
	207	we move on.
	208	*/
	209	}
	210
	211	static void file_read ( VikAggregateLayer top, FILE f, gpointer vp )
	212	{
	213	Stack *stack;
	214	struct LatLon ll = { 0.0, 0.0 };
	215	gchar buffer[4096];
	216	gchar *line;
	217	guint16 len;
	218	long line_num = 0;
	219
37518034 QT	220	VikLayerParam params = NULL; / for current layer, so we don't have to keep on looking up interface */
37518034 QT	221	guint8 params_count = 0;
50a14534 EB	222
	223	push(&stack);
	224	stack->under = NULL;
	225	stack->data = (gpointer) top;
	226
	227	while ( fgets ( buffer, 4096, f ) )
	228	{
	229	line_num++;
	230
	231	line = buffer;
	232	while ( line == ' ' \|\| line =='\t' )
	233	line++;
	234
	235	if ( line[0] == '#' )
	236	continue;
	237
	238
	239	len = strlen(line);
	240	if ( len > 0 && line[len-1] == '\n' )
	241	line[--len] = '\0';
	242	if ( len > 0 && line[len-1] == '\r' )
	243	line[--len] = '\0';
	244
	245	if ( len == 0 )
	246	continue;
	247
	248
	249	if ( line[0] == '~' )
	250	{
	251	line++; len--;
	252	if ( *line == '\0' )
	253	continue;
	254	else if ( str_starts_with ( line, "Layer ", 6, TRUE ) )
	255	{
f253a6a6 QT	256	int parent_type = VIK_LAYER(stack->data)->type;
f253a6a6 QT	257	if ( ( ! stack->data ) \|\| ((parent_type != VIK_LAYER_AGGREGATE) && (parent_type != VIK_LAYER_GPS)) )
50a14534	258	{
f253a6a6	259	g_warning ( "Line %ld: Layer command inside non-Aggregate Layer (type %d)", line_num, parent_type );
50a14534 EB	260	push(&stack); /* inside INVALID layer */
	261	stack->data = NULL;
	262	continue;
	263	}
	264	else
	265	{
	266	gint16 type = layer_type_from_string ( line+6 );
	267	push(&stack);
	268	if ( type == -1 )
	269	{
	270	g_warning ( "Line %ld: Unknown type %s\n", line_num, line+6 );
	271	stack->data = NULL;
	272	}
f253a6a6 QT	273	else if (parent_type == VIK_LAYER_GPS)
	274	{
	275	stack->data = (gpointer) vik_gps_layer_get_a_child(VIK_GPS_LAYER(stack->under->data));
	276	params = vik_layer_get_interface(type)->params;
	277	params_count = vik_layer_get_interface(type)->params_count;
	278	}
50a14534 EB	279	else
	280	{
	281	stack->data = (gpointer) vik_layer_create ( type, vp, NULL, FALSE );
	282	params = vik_layer_get_interface(type)->params;
	283	params_count = vik_layer_get_interface(type)->params_count;
	284	}
	285	}
	286	}
	287	else if ( str_starts_with ( line, "EndLayer", 8, FALSE ) )
	288	{
	289	if ( stack->under == NULL )
	290	g_warning ( "Line %ld: Mismatched ~EndLayer command", line_num );
	291	else
	292	{
	293	if ( stack->data && stack->under->data )
	294	{
f253a6a6 QT	295	if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_AGGREGATE) {
	296	vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data) );
	297	vik_layer_post_read ( VIK_LAYER(stack->data), vp );
	298	}
	299	else if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_GPS) {
	300	/* TODO: anything else needs to be done here ? */
	301	}
	302	else
	303	g_warning ( "Line %ld: EndLayer command inside non-Aggregate Layer (type %d)", line_num, VIK_LAYER(stack->data)->type );
50a14534 EB	304	}
	305	pop(&stack);
	306	}
	307	}
	308	else if ( str_starts_with ( line, "LayerData", 9, FALSE ) )
	309	{
	310	if ( stack->data && vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data )
	311	vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data ( VIK_LAYER(stack->data), f );
	312	/* must read until hits ~EndLayerData */
	313
	314	else
	315	{ /* simply skip layer data over */
	316	while ( fgets ( buffer, 4096, f ) )
	317	{
	318	line_num++;
	319
	320	line = buffer;
	321
	322	len = strlen(line);
	323	if ( len > 0 && line[len-1] == '\n' )
	324	line[--len] = '\0';
	325	if ( len > 0 && line[len-1] == '\r' )
	326	line[--len] = '\0';
	327	if ( strcasecmp ( line, "~EndLayerData" ) == 0 )
	328	break;
	329	}
	330	continue;
	331	}
	332	}
	333	else
	334	{
	335	g_warning ( "Line %ld: Unknown tilde command", line_num );
	336	}
	337	}
	338	else
	339	{
	340	gint32 eq_pos = -1;
	341	guint16 i;
	342	if ( ! stack->data )
	343	continue;
	344
	345	for ( i = 0; i < len; i++ )
	346	if ( line[i] == '=' )
	347	eq_pos = i;
	348
	349	if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "xmpp", eq_pos ) == 0) /* "hard coded" params: global & for all layer-types */
	350	vik_viewport_set_xmpp ( VIK_VIEWPORT(vp), strtod ( line+5, NULL ) );
	351	else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "ympp", eq_pos ) == 0)
	352	vik_viewport_set_ympp ( VIK_VIEWPORT(vp), strtod ( line+5, NULL ) );
	353	else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lat", eq_pos ) == 0 )
	354	ll.lat = strtod ( line+4, NULL );
	355	else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lon", eq_pos ) == 0 )
	356	ll.lon = strtod ( line+4, NULL );
	357	else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "utm" ) == 0)
	358	vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_UTM);
	359	else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "expedia" ) == 0)
	360	vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_EXPEDIA );
	361	else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "google" ) == 0)
	362	vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_GOOGLE );
	363	else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "kh" ) == 0)
	364	vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_KH );
	365	else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "mercator" ) == 0)
	366	vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_MERCATOR );
	367	else if ( stack->under == NULL && eq_pos == 5 && strncasecmp ( line, "color", eq_pos ) == 0 )
368	vik_viewport_set_background_color ( VIK_VIEWPORT(vp), line+6 );
35c7c0ba EB	369	else if ( stack->under == NULL && eq_pos == 9 && strncasecmp ( line, "drawscale", eq_pos ) == 0 )
35c7c0ba EB	370	vik_viewport_set_draw_scale ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+10) );
de66b263	371	else if ( stack->under == NULL && eq_pos == 14 && strncasecmp ( line, "drawcentermark", eq_pos ) == 0 )
1657065a	372	vik_viewport_set_draw_centermark ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+15) );
50a14534 EB	373	else if ( stack->under && eq_pos == 4 && strncasecmp ( line, "name", eq_pos ) == 0 )
	374	vik_layer_rename ( VIK_LAYER(stack->data), line+5 );
	375	else if ( eq_pos == 7 && strncasecmp ( line, "visible", eq_pos ) == 0 )
	376	VIK_LAYER(stack->data)->visible = TEST_BOOLEAN(line+8);
	377	else if ( eq_pos != -1 && stack->under )
	378	{
	379	gboolean found_match = FALSE;
	380	/* go thru layer params. if len == eq_pos && starts_with jazz, set it. */
	381	/* also got to check for name and visible. */
	382
	383	if ( ! params )
	384	{
	385	g_warning ( "Line %ld: No options for this kind of layer", line_num );
	386	continue;
	387	}
	388
	389	for ( i = 0; i < params_count; i++ )
	390	if ( strlen(params[i].name) == eq_pos && strncasecmp ( line, params[i].name, eq_pos ) == 0 )
	391	{
	392	VikLayerParamData x;
	393	line += eq_pos+1;
	394	switch ( params[i].type )
	395	{
	396	case VIK_LAYER_PARAM_DOUBLE: x.d = strtod(line, NULL); break;
	397	case VIK_LAYER_PARAM_UINT: x.u = strtoul(line, NULL, 10); break;
	398	case VIK_LAYER_PARAM_INT: x.i = strtol(line, NULL, 10); break;
	399	case VIK_LAYER_PARAM_BOOLEAN: x.b = TEST_BOOLEAN(line); break;
	400	case VIK_LAYER_PARAM_COLOR: memset(&(x.c), 0, sizeof(x.c)); /* default: black */
	401	gdk_color_parse ( line, &(x.c) ); break;
	402	default: x.s = line;
	403	}
	404	vik_layer_set_param ( VIK_LAYER(stack->data), i, x, vp );
	405	found_match = TRUE;
	406	break;
	407	}
	408	if ( ! found_match )
ea3933fc	409	g_warning ( "Line %ld: Unknown parameter. Line:\n%s", line_num, line );
50a14534 EB	410	}
	411	else
	412	g_warning ( "Line %ld: Invalid parameter or parameter outside of layer.", line_num );
	413	}
	414	/* could be:
	415	[Layer Type=Bla]
	416	[EndLayer]
	417	[LayerData]
	418	name=this
	419	#comment
	420	*/
	421	}
	422
	423	while ( stack )
	424	{
	425	if ( stack->under && stack->under->data && stack->data )
	426	{
	427	vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data) );
	428	vik_layer_post_read ( VIK_LAYER(stack->data), vp );
	429	}
	430	pop(&stack);
	431	}
	432
	433	if ( ll.lat != 0.0 \|\| ll.lon != 0.0 )
	434	vik_viewport_set_center_latlon ( VIK_VIEWPORT(vp), &ll );
	435
	436	if ( ( ! VIK_LAYER(top)->visible ) && VIK_LAYER(top)->realized )
	437	vik_treeview_item_set_visible ( VIK_LAYER(top)->vt, &(VIK_LAYER(top)->iter), FALSE );
	438	}
	439
	440	/*
	441	read thru file
	442	if "[Layer Type="
	443	push(&stack)
	444	new default layer of type (str_to_type) (check interface->name)
	445	if "[EndLayer]"
	446	VikLayer *vl = stack->data;
	447	pop(&stack);
	448	vik_aggregate_layer_add_layer(stack->data, vl);
	449	if "[LayerData]"
	450	vik_layer_data ( VIK_LAYER_DATA(stack->data), f, vp );
	451
	452	*/
	453
	454	/* ---------------------------------------------------- */
	455
	456	static FILE xfopen ( const char fn, const char *mode )
	457	{
	458	if ( strcmp(fn,"-") == 0 )
	459	return stdin;
	460	else
	461	return fopen(fn, "r");
	462	}
	463
	464	static void xfclose ( FILE *f )
	465	{
	466	if ( f != stdin && f != stdout )
	467	fclose ( f );
	468	}
	469
	470	/* 0 on failure, 1 on success (vik file) 2 on success (other file) */
	471	gshort a_file_load ( VikAggregateLayer top, gpointer vp, const gchar filename )
	472	{
	473	FILE *f = xfopen ( filename, "r" );
474
475	g_assert ( vp );
476
477	if ( ! f )
478	return 0;
479
bf35388d	480	if ( check_magic ( f, VIK_MAGIC ) )
50a14534 EB	481	{
	482	file_read ( top, f, vp );
	483	if ( f != stdin )
	484	xfclose(f);
	485	return 1;
	486	}
	487	else
	488	{
	489	VikCoord new_center;
	490	VikLayer *vtl = vik_layer_create ( VIK_LAYER_TRW, vp, NULL, FALSE );
	491	vik_layer_rename ( vtl, a_file_basename ( filename ) );
bf35388d EB	492
	493	if ( check_magic ( f, GPX_MAGIC ) )
	494	a_gpx_read_file ( VIK_TRW_LAYER(vtl), f );
	495	else
	496	a_gpspoint_read_file ( VIK_TRW_LAYER(vtl), f );
50a14534 EB	497
	498	vik_layer_post_read ( vtl, vp );
	499
	500	vik_aggregate_layer_add_layer ( top, vtl );
	501
	502	if ( vik_trw_layer_find_center ( VIK_TRW_LAYER(vtl), &new_center ) )
	503	vik_viewport_set_center_coord ( VIK_VIEWPORT(vp), &new_center );
	504	xfclose(f);
	505	return 2;
	506	}
	507	}
	508
	509	gboolean a_file_save ( VikAggregateLayer top, gpointer vp, const gchar filename )
	510	{
	511	FILE *f = fopen(filename, "w");
	512
	513	if ( ! f )
	514	return FALSE;
	515
	516	file_write ( top, f, vp );
	517
	518	fclose(f);
	519
	520	return TRUE;
	521	}
	522
	523
	524	const gchar a_file_basename ( const gchar filename )
	525	{
	526	const gchar *t = filename + strlen(filename) - 1;
	527	while ( --t > filename )
	528	if ( *(t-1) == FILE_SEP )
	529	break;
	530	if ( t >= filename )
	531	return t;
	532	return filename;
	533	}
	534
	535	gboolean a_file_export ( VikTrwLayer vtl, const gchar filename, gshort file_type )
	536	{
	537	FILE *f = fopen ( filename, "w" );
	538	if ( f )
	539	{
	540	if ( file_type == FILE_TYPE_GPSMAPPER )
	541	a_gpsmapper_write_file ( vtl, f );
561e6ad0 EB	542	else if ( file_type == FILE_TYPE_GPX )
561e6ad0 EB	543	a_gpx_write_file ( vtl, f );
50a14534 EB	544	else
	545	a_gpspoint_write_file ( vtl, f );
	546	fclose ( f );
	547	return TRUE;
	548	}
	549	return FALSE;
	550	}
80d0ff2b QT	551
	552	const gchar *a_get_viking_dir()
	553	{
	554	static gchar *viking_dir = NULL;
	555
	556	if (!viking_dir) {
	557	gchar *temp[] = {"/tmp/vikXXXXXX"};
	558	gchar *home = getenv("HOME");
	559	if (!home \|\| access(home, W_OK))
	560	home = mktemp(temp);
	561	viking_dir = g_strdup_printf("%s/%s", home, ".viking");
	562	if (access(viking_dir, F_OK))
d5728c65	563	g_mkdir(viking_dir, 0755);
80d0ff2b QT	564	}
	565
	566	return viking_dir;
	567	}