path: root/navit/map/textfile/textfile.c

/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#include <glib.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "config.h"
#include "debug.h"
#include "plugin.h"
#include "projection.h"
#include "item.h"
#include "map.h"
#include "maptype.h"
#include "attr.h"
#include "transform.h"
#include "file.h"

#include "textfile.h"

static int map_id;

static void
get_line(struct map_rect_priv *mr)
{
	if(mr->f) {
		if (!mr->m->is_pipe) 
			mr->pos=ftell(mr->f);
		else
			mr->pos+=mr->lastlen;
		fgets(mr->line, SIZE, mr->f);
		mr->lastlen=strlen(mr->line)+1;
		if (strlen(mr->line) >= SIZE-1) 
			printf("line too long\n");
	}
}

static void
map_destroy_textfile(struct map_priv *m)
{
	dbg(1,"map_destroy_textfile\n");
	g_free(m->filename);
	if(m->charset) {
		g_free(m->charset);
	}
	g_free(m);
}

static void
textfile_coord_rewind(void *priv_data)
{
}

static int
parse_line(struct map_rect_priv *mr, int attr)
{
	int pos;

	pos=coord_parse(mr->line, projection_mg, &mr->c);
	if (pos < strlen(mr->line) && attr) {
		strcpy(mr->attrs, mr->line+pos);
	}
	return pos;
}

static int
textfile_coord_get(void *priv_data, struct coord *c, int count)
{
	struct map_rect_priv *mr=priv_data;
	int ret=0;
	dbg(1,"textfile_coord_get %d\n",count);
	while (count--) {
		if (mr->f && !feof(mr->f) && (!mr->item.id_hi || !mr->eoc) && parse_line(mr, mr->item.id_hi)) {
			*c=mr->c;
			dbg(1,"c=0x%x,0x%x\n", c->x, c->y);
			c++;
			ret++;		
			get_line(mr);
			if (mr->item.id_hi)
				mr->eoc=1;
		} else {
			mr->more=0;
			break;
		}
	}
	return ret;
}

static void
textfile_attr_rewind(void *priv_data)
{
	struct map_rect_priv *mr=priv_data;
	mr->attr_pos=0;
	mr->attr_last=attr_none;
}

static void
textfile_encode_attr(char *attr_val, enum attr_type attr_type, struct attr *attr)
{
	if (attr_type >= attr_type_int_begin && attr_type <= attr_type_int_end) 
		attr->u.num=atoi(attr_val);
	else
		attr->u.str=attr_val;
}

static int
textfile_attr_get(void *priv_data, enum attr_type attr_type, struct attr *attr)
{	
	struct map_rect_priv *mr=priv_data;
	char *str=NULL;
	dbg(1,"textfile_attr_get mr=%p attrs='%s' ", mr, mr->attrs);
	if (attr_type != mr->attr_last) {
		dbg(1,"reset attr_pos\n");
		mr->attr_pos=0;
		mr->attr_last=attr_type;
	}
	if (attr_type == attr_any) {
		dbg(1,"attr_any");
		if (attr_from_line(mr->attrs,NULL,&mr->attr_pos,mr->attr, mr->attr_name)) {
			attr_type=attr_from_name(mr->attr_name);
			dbg(1,"found attr '%s' 0x%x\n", mr->attr_name, attr_type);
			attr->type=attr_type;
			textfile_encode_attr(mr->attr, attr_type, attr);
			return 1;
		}
	} else {
		str=attr_to_name(attr_type);
		dbg(1,"attr='%s' ",str);
		if (attr_from_line(mr->attrs,str,&mr->attr_pos,mr->attr, NULL)) {
			textfile_encode_attr(mr->attr, attr_type, attr);
			dbg(1,"found\n");
			return 1;
		}
	}
	dbg(1,"not found\n");
	return 0;
}

static struct item_methods methods_textfile = {
        textfile_coord_rewind,
        textfile_coord_get,
        textfile_attr_rewind,
        textfile_attr_get,
};

static struct map_rect_priv *
map_rect_new_textfile(struct map_priv *map, struct map_selection *sel)
{
	struct map_rect_priv *mr;

	dbg(1,"map_rect_new_textfile\n");
	mr=g_new0(struct map_rect_priv, 1);
	mr->m=map;
	mr->sel=sel;
	if (map->flags & 1)
		mr->item.id_hi=1;
	else
		mr->item.id_hi=0;
	mr->item.id_lo=0;
	mr->item.meth=&methods_textfile;
	mr->item.priv_data=mr;
	if (map->is_pipe) {
#ifdef HAVE_POPEN
		char *oargs,*args=g_strdup(map->filename),*sep=" ";
		enum layer_type lay;
		g_free(mr->args);
		while (sel) {
			oargs=args;
			args=g_strdup_printf("%s 0x%x 0x%x 0x%x 0x%x", oargs, sel->u.c_rect.lu.x, sel->u.c_rect.lu.y, sel->u.c_rect.rl.x, sel->u.c_rect.rl.y);
			g_free(oargs);
			for (lay=layer_town ; lay < layer_end ; lay++) {
				oargs=args;
				args=g_strdup_printf("%s%s%d", oargs, sep, sel->order);
				g_free(oargs);
				sep=",";
			}
			sel=sel->next;
		}
		dbg(1,"popen args %s\n", args);
		mr->args=args;
		mr->f=popen(mr->args, "r");
		mr->pos=0;
		mr->lastlen=0;
#else
		dbg(0,"map_rect_new_textfile is unable to work with pipes %s\n",map->filename);
#endif 
	} else {
		mr->f=fopen(map->filename, "r");
	}
	if(!mr->f) {
		printf("map_rect_new_textfile unable to open textfile %s\n",map->filename);
	}
	get_line(mr);
	return mr;
}


static void
map_rect_destroy_textfile(struct map_rect_priv *mr)
{
	if (mr->f) {
		if (mr->m->is_pipe) {
#ifdef HAVE_POPEN
			pclose(mr->f);
#endif
		}
		else {
			fclose(mr->f);
		}
	}
        g_free(mr);
}

static struct item *
map_rect_get_item_textfile(struct map_rect_priv *mr)
{
	char *p,type[SIZE];
	dbg(1,"map_rect_get_item_textfile id_hi=%d line=%s", mr->item.id_hi, mr->line);
	if (!mr->f) {
		return NULL;
	}
	while (mr->more) {
		struct coord c;
		textfile_coord_get(mr, &c, 1);
	}
	for(;;) {
		if (feof(mr->f)) {
			dbg(1,"map_rect_get_item_textfile: eof %d\n",mr->item.id_hi);
			if (mr->m->flags & 1) {
				if (!mr->item.id_hi) 
					return NULL;
				mr->item.id_hi=0;
			} else {
				if (mr->item.id_hi) 
					return NULL;
				mr->item.id_hi=1;
			}
			if (mr->m->is_pipe) {
#ifdef HAVE_POPEN
				pclose(mr->f);
				mr->f=popen(mr->args, "r");
				mr->pos=0;
				mr->lastlen=0;
#endif
			} else {
				fseek(mr->f, 0, SEEK_SET);
				clearerr(mr->f);
			}
			get_line(mr);
		}
		if ((p=strchr(mr->line,'\n'))) 
			*p='\0';
		if (mr->item.id_hi) {
			mr->attrs[0]='\0';
			if (!parse_line(mr, 1)) {
				get_line(mr);
				continue;
			}
			dbg(1,"map_rect_get_item_textfile: point found\n");
			mr->eoc=0;
			mr->item.id_lo=mr->pos;
		} else {
			if (parse_line(mr, 1)) {
				get_line(mr);
				continue;
			}
			dbg(1,"map_rect_get_item_textfile: line found\n");
			if (! mr->line[0]) {
				get_line(mr);
				continue;
			}
			mr->item.id_lo=mr->pos;
			strcpy(mr->attrs, mr->line);
			get_line(mr);
			dbg(1,"mr=%p attrs=%s\n", mr, mr->attrs);
		}
		dbg(1,"get_attrs %s\n", mr->attrs);
		if (attr_from_line(mr->attrs,"type",NULL,type,NULL)) {
			dbg(1,"type='%s'\n", type);
			mr->item.type=item_from_name(type);
			if (mr->item.type == type_none) 
				printf("Warning: type '%s' unknown\n", type);
		} else {
			get_line(mr);
			continue;
		}
		mr->attr_last=attr_none;
		mr->more=1;
		dbg(1,"return attr='%s'\n", mr->attrs);
		return &mr->item;
	}
}

static struct item *
map_rect_get_item_byid_textfile(struct map_rect_priv *mr, int id_hi, int id_lo)
{
	if (mr->m->is_pipe) {
#ifndef _MSC_VER
		pclose(mr->f);
		mr->f=popen(mr->args, "r");
		mr->pos=0;
		mr->lastlen=0;
#endif /* _MSC_VER */
	} else
		fseek(mr->f, id_lo, SEEK_SET);
	get_line(mr);
	mr->item.id_hi=id_hi;
	return map_rect_get_item_textfile(mr);
}

static struct map_methods map_methods_textfile = {
	projection_mg,
	"iso8859-1",
	map_destroy_textfile,
	map_rect_new_textfile,
	map_rect_destroy_textfile,
	map_rect_get_item_textfile,
	map_rect_get_item_byid_textfile,
};

static struct map_priv *
map_new_textfile(struct map_methods *meth, struct attr **attrs, struct callback_list *cbl)
{
	struct map_priv *m;
	struct attr *data=attr_search(attrs, NULL, attr_data);
	struct attr *charset=attr_search(attrs, NULL, attr_charset);
	struct attr *flags=attr_search(attrs, NULL, attr_flags);
	struct file_wordexp *wexp;
	int len,is_pipe=0;
	char *wdata;
	char **wexp_data;
	if (! data)
		return NULL;
	dbg(1,"map_new_textfile %s\n", data->u.str);	
	wdata=g_strdup(data->u.str);
	len=strlen(wdata);
	if (len && wdata[len-1] == '|') {
		wdata[len-1]='\0';
		is_pipe=1;
	}
	wexp=file_wordexp_new(wdata);
	wexp_data=file_wordexp_get_array(wexp);
	*meth=map_methods_textfile;

	m=g_new0(struct map_priv, 1);
	m->id=++map_id;
	m->filename=g_strdup(wexp_data[0]);
	m->is_pipe=is_pipe;
	if (flags) 
		m->flags=flags->u.num;
	dbg(1,"map_new_textfile %s %s\n", m->filename, wdata);
	if (charset) {
		m->charset=g_strdup(charset->u.str);
		meth->charset=m->charset;
	}
	file_wordexp_destroy(wexp);
	g_free(wdata);
	return m;
}

void
plugin_init(void)
{
	dbg(1,"textfile: plugin_init\n");
	plugin_register_map_type("textfile", map_new_textfile);
}