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spatialite_gml.c
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spatialite_gml.c
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/*
/ spatialite_gml
/
/ a tool loading GML into a SpatiaLite DB
/
/ version 1.0, 2010 August 5
/
/ Author: Sandro Furieri [email protected]
/
/ Copyright (C) 2010 Alessandro Furieri
/
/ 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 3 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, see <http://www.gnu.org/licenses/>.
/
*/
#if defined(_WIN32) && !defined(__MINGW32__)
/* MSVC strictly requires this include [off_t] */
#include <sys/types.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <float.h>
#include <limits.h>
#include <expat.h>
#if defined(_WIN32) && !defined(__MINGW32__)
#include "config-msvc.h"
#else
#include "config.h"
#endif
#ifdef SPATIALITE_AMALGAMATION
#include <spatialite/sqlite3.h>
#else
#include <sqlite3.h>
#endif
#include <spatialite/gaiageo.h>
#include <spatialite.h>
#define ARG_NONE 0
#define ARG_GML_PATH 1
#define ARG_DB_PATH 2
#define ARG_TABLE 3
#define BUFFSIZE 8192
#define COLUMN_NONE 0
#define COLUMN_INT 1
#define COLUMN_FLOAT 2
#define COLUMN_TEXT 3
#define GEOM_NONE 0
#define GEOM_POINT 1
#define GEOM_LINESTRING 2
#define GEOM_POLYGON 3
#define GEOM_MULTIPOINT 4
#define GEOM_MULTILINESTRING 5
#define GEOM_MULTIPOLYGON 6
#define GEOM_COLLECTION 7
#define VALUE_NULL 0
#define VALUE_INT 1
#define VALUE_FLOAT 2
#define VALUE_TEXT 3
#if defined(_WIN32) && !defined(__MINGW32__)
#define strcasecmp _stricmp
#endif /* not WIN32 */
#if defined(_WIN32)
#define atol_64 _atoi64
#else
#define atol_64 atoll
#endif
struct gml_column
{
/* an auxiliary struct used for Colums */
char *name;
int type;
char *txt_value;
sqlite3_int64 int_value;
double dbl_value;
int value_type;
struct gml_column *next;
};
struct gml_rings_list
{
/* an auxiliary struct used for Polygon's Interior Rings */
gaiaDynamicLinePtr ring;
struct gml_rings_list *next;
};
struct gml_rings_collection
{
/* an auxiliary struct used for Polygons */
gaiaDynamicLinePtr exterior;
struct gml_rings_list *first;
struct gml_rings_list *last;
};
struct gml_params
{
/* an auxiliary struct used for GML parsing */
sqlite3 *db_handle;
sqlite3_stmt *stmt;
int geometry_type;
int declared_type;
int srid;
char fid_tag[1024];
char fid_prefix[1024];
char fid_name[1024];
char *CharData;
int CharDataLen;
int CharDataMax;
int CharDataStep;
int is_feature;
int is_fid;
int is_point;
int is_multi_point;
int is_linestring;
int is_multi_linestring;
int is_polygon;
int is_multi_polygon;
int is_outer_boundary;
int is_inner_boundary;
int geometry_column;
char coord_decimal;
char coord_cs;
char coord_ts;
struct gml_column *first;
struct gml_column *last;
gaiaGeomCollPtr geometry;
struct gml_rings_collection polygon;
};
static void
split_fid (const char *org, char *prefix, char *name)
{
/* extracting the <FID> prefix */
char dummy[1024];
int i;
strcpy (dummy, org);
for (i = 0; i < (int) strlen (dummy); i++)
{
if (dummy[i] == ':')
{
dummy[i] = '\0';
strcpy (prefix, dummy);
strcpy (name, dummy + i + 1);
return;
}
}
*prefix = '\0';
strcpy (name, org);
}
static void
check_start_fid (struct gml_params *params, const char *el, const char **attr)
{
/* checking if this element contains a "FID" attribute */
int count = 0;
const char *k;
const char **attrib = attr;
char prefix[1024];
char name[1024];
while (*attrib != NULL)
{
if ((count % 2) == 0)
k = *attrib;
else
{
if (strcasecmp (k, "fid") == 0)
{
split_fid (el, prefix, name);
params->is_fid = 1;
strcpy (params->fid_tag, el);
strcpy (params->fid_prefix, prefix);
strcpy (params->fid_name, name);
}
if (strcasecmp (k, "gml:id") == 0)
{
split_fid (el, prefix, name);
params->is_fid = 1;
strcpy (params->fid_tag, el);
strcpy (params->fid_prefix, prefix);
strcpy (params->fid_name, name);
}
}
attrib++;
count++;
}
}
static void
check_end1_fid (struct gml_params *params, const char *el)
{
/* checking if the FID tag ends here */
if (strcasecmp (params->fid_tag, el) == 0)
params->is_fid = 0;
}
static int
get_data_type (const char *data)
{
/* guessing data type */
int digits = 0;
int points = 0;
int signs = 0;
int others = 0;
int i;
int len = strlen (data);
for (i = 0; i < len; i++)
{
if (data[i] >= '0' && data[i] <= '9')
digits++;
else if (data[i] == '.')
points++;
else if (data[i] == '+' || data[i] == '-')
signs++;
else
others++;
}
if (others)
return COLUMN_TEXT;
if (digits > 0 && points == 0 && signs <= 1)
return COLUMN_INT;
if (digits > 0 && points == 1 && signs <= 1)
return COLUMN_FLOAT;
if (len == 0)
return COLUMN_NONE;
return COLUMN_TEXT;
}
static void
add_column (struct gml_params *params, const char *name, int type)
{
/* adding/checking a Column */
int len;
struct gml_column *col = params->first;
while (col)
{
if (strcasecmp (col->name, name) == 0)
{
if (col->type == type)
return;
if (col->type == COLUMN_NONE)
{
/* setting a data type */
col->type = type;
return;
}
if (type == COLUMN_TEXT)
{
/* promoting a Column to be TEXT */
col->type = COLUMN_TEXT;
return;
}
if (col->type == COLUMN_INT && type == COLUMN_FLOAT)
{
/* promoting a Column to be FLOAT */
col->type = COLUMN_FLOAT;
return;
}
return;
}
col = col->next;
}
col = malloc (sizeof (struct gml_column));
len = strlen (name);
col->name = malloc (len + 1);
strcpy (col->name, name);
col->type = type;
col->txt_value = NULL;
col->next = NULL;
if (params->first == NULL)
params->first = col;
if (params->last != NULL)
params->last->next = col;
params->last = col;
}
static void
column_name (struct gml_params *params, const char *el)
{
/* handling a column name */
char prefix[1024];
char name[1024];
int type;
if (params->is_point || params->is_multi_point || params->is_linestring
|| params->is_multi_linestring || params->is_polygon
|| params->is_multi_polygon)
return;
if (params->geometry_column)
return;
else
type = get_data_type (params->CharData);
split_fid (el, prefix, name);
if (strcasecmp (prefix, params->fid_prefix) != 0)
return;
add_column (params, name, type);
}
static void
set_geometry (struct gml_params *params, int type)
{
/* setting the Geometry Type */
if (params->geometry_type == GEOM_NONE)
{
/* all right, this is the first time */
params->geometry_type = type;
return;
}
if (params->geometry_type == type)
return;
if (params->geometry_type == GEOM_MULTIPOINT && type == GEOM_POINT)
return;
if (params->geometry_type == GEOM_MULTILINESTRING
&& type == GEOM_LINESTRING)
return;
if (params->geometry_type == GEOM_MULTIPOLYGON && type == GEOM_POLYGON)
return;
if (params->geometry_type == GEOM_POINT && type == GEOM_MULTIPOINT)
{
params->geometry_type = GEOM_MULTIPOINT;
return;
}
if (params->geometry_type == GEOM_LINESTRING
&& type == GEOM_MULTILINESTRING)
{
params->geometry_type = GEOM_MULTILINESTRING;
return;
}
if (params->geometry_type == GEOM_POLYGON && type == GEOM_MULTIPOLYGON)
{
params->geometry_type = GEOM_MULTIPOLYGON;
return;
}
params->geometry_type = GEOM_COLLECTION;
}
static int
parse_srid (const char *srs)
{
/* trying to parse the SRID from SRS name */
int i;
int srid = -1;
for (i = strlen (srs) - 1; i >= 0; i--)
{
if (srs[i] == '#' || srs[i] == ':')
{
srid = atoi (srs + i + 1);
return srid;
}
}
return srid;
}
static void
set_srid (struct gml_params *params, const char **attr)
{
/* setting the SRID */
int count = 0;
const char *k;
const char *v;
const char **attrib = attr;
while (*attrib != NULL)
{
if ((count % 2) == 0)
k = *attrib;
else
{
v = *attrib;
if (strcasecmp (k, "srsName") == 0)
{
int srid = parse_srid (v);
if (params->srid == INT_MIN)
{
/* this one is the first time */
params->srid = srid;
return;
}
if (srid == params->srid)
return;
params->srid = -1;
return;
}
}
attrib++;
count++;
}
}
static void
gmlCharData (void *data, const XML_Char * s, int len)
{
/* parsing XML char data */
struct gml_params *params = (struct gml_params *) data;
if ((params->CharDataLen + len) > params->CharDataMax)
{
/* we must increase the CharData buffer size */
void *new_buf;
int new_size = params->CharDataMax;
while (new_size < params->CharDataLen + len)
new_size += params->CharDataStep;
new_buf = realloc (params->CharData, new_size);
if (new_buf)
{
params->CharData = new_buf;
params->CharDataMax = new_size;
}
}
memcpy (params->CharData + params->CharDataLen, s, len);
params->CharDataLen += len;
}
static void
start1_tag (void *data, const char *el, const char **attr)
{
/* GML element starting [Pass I] */
struct gml_params *params = (struct gml_params *) data;
if (params->is_point || params->is_multi_point || params->is_linestring
|| params->is_multi_linestring || params->is_polygon
|| params->is_multi_polygon)
return;
params->geometry_column = 0;
if (strcasecmp (el, "gml:Point") == 0)
{
set_srid (params, attr);
params->is_point = 1;
return;
}
if (strcasecmp (el, "gml:MultiPoint") == 0)
{
set_srid (params, attr);
params->is_multi_point = 1;
return;
}
if (strcasecmp (el, "gml:LineString") == 0)
{
set_srid (params, attr);
params->is_linestring = 1;
return;
}
if (strcasecmp (el, "gml:MultiLineString") == 0)
{
set_srid (params, attr);
params->is_multi_linestring = 1;
return;
}
if (strcasecmp (el, "gml:Polygon") == 0)
{
set_srid (params, attr);
params->is_polygon = 1;
return;
}
if (strcasecmp (el, "gml:MultiPolygon") == 0)
{
set_srid (params, attr);
params->is_multi_polygon = 1;
return;
}
if (strcasecmp (el, "gml:MultiSurface") == 0)
{
set_srid (params, attr);
params->is_multi_polygon = 1;
return;
}
if (strcasecmp (el, "gml:featureMember") == 0)
{
params->is_feature = 1;
return;
}
if (strcasecmp (el, "gml:featureMembers") == 0)
{
params->is_feature = 1;
return;
}
if (params->is_fid)
{
*(params->CharData) = '\0';
params->CharDataLen = 0;
}
if (params->is_feature)
check_start_fid (params, el, attr);
}
static void
end1_tag (void *data, const char *el)
{
/* GML element ending [Pass I] */
struct gml_params *params = (struct gml_params *) data;
if (strcmp (el, "gml:featureMember") == 0)
{
params->is_feature = 0;
return;
}
if (strcmp (el, "gml:featureMembers") == 0)
{
params->is_feature = 0;
return;
}
if (strcasecmp (el, "gml:Point") == 0)
{
params->is_point = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_POINT);
return;
}
if (strcasecmp (el, "gml:MultiPoint") == 0)
{
params->is_multi_point = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_MULTIPOINT);
return;
}
if (strcasecmp (el, "gml:LineString") == 0)
{
params->is_linestring = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_LINESTRING);
return;
}
if (strcasecmp (el, "gml:MultiLineString") == 0)
{
params->is_multi_linestring = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_MULTILINESTRING);
return;
}
if (strcasecmp (el, "gml:Polygon") == 0)
{
params->is_polygon = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_MULTIPOLYGON);
return;
}
if (strcasecmp (el, "gml:MultiPolygon") == 0)
{
params->is_multi_polygon = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_MULTIPOLYGON);
return;
}
if (strcasecmp (el, "gml:MultiSurface") == 0)
{
params->is_multi_polygon = 0;
params->geometry_column = 1;
*(params->CharData) = '\0';
params->CharDataLen = 0;
set_geometry (params, GEOM_MULTIPOLYGON);
return;
}
if (params->is_feature)
check_end1_fid (params, el);
if (params->is_fid)
{
*(params->CharData + params->CharDataLen) = '\0';
column_name (params, el);
}
*(params->CharData) = '\0';
params->CharDataLen = 0;
}
static void
column_value (struct gml_params *params, const char *el)
{
/* handling a column value */
char prefix[1024];
char name[1024];
struct gml_column *col;
if (params->is_point || params->is_multi_point || params->is_linestring
|| params->is_multi_linestring || params->is_polygon
|| params->is_multi_polygon)
return;
split_fid (el, prefix, name);
col = params->first;
while (col)
{
if (strcasecmp (col->name, name) == 0)
{
if (params->CharDataLen == 0)
return;
switch (col->type)
{
case COLUMN_INT:
col->int_value = atol_64 (params->CharData);
col->value_type = VALUE_INT;
break;
case COLUMN_FLOAT:
col->dbl_value = atof (params->CharData);
col->value_type = VALUE_FLOAT;
break;
case COLUMN_TEXT:
col->txt_value = malloc (params->CharDataLen + 1);
strcpy (col->txt_value, params->CharData);
col->value_type = VALUE_TEXT;
break;
}
return;
}
col = col->next;
}
}
static void
polygon_set_up (struct gml_params *params)
{
/* setting up the latest Polygon (if any) */
int iv;
int ib;
int interiors;
struct gml_rings_list *rg;
gaiaDynamicLinePtr dyn_line;
gaiaPointPtr pt;
gaiaPolygonPtr pg;
gaiaRingPtr ring;
if (params->polygon.exterior == NULL)
return;
if (params->geometry == NULL)
params->geometry = gaiaAllocGeomColl ();
/* preliminary recognition */
dyn_line = params->polygon.exterior;
iv = 0;
pt = dyn_line->First;
while (pt)
{
/* counting how many POINTs are into the Exterior Ring */
iv++;
pt = pt->Next;
}
interiors = 0;
rg = params->polygon.first;
while (rg)
{
/* counting how many Interior Rings are there */
interiors++;
rg = rg->next;
}
pg = gaiaAddPolygonToGeomColl (params->geometry, iv, interiors);
/* setting up the Exterior Ring */
ring = pg->Exterior;
iv = 0;
dyn_line = params->polygon.exterior;
pt = dyn_line->First;
while (pt)
{
/* inserting any POINT into the Exterior Ring */
gaiaSetPoint (ring->Coords, iv, pt->X, pt->Y);
iv++;
pt = pt->Next;
}
ib = 0;
rg = params->polygon.first;
while (rg)
{
/* setting up any Interior Ring */
dyn_line = params->polygon.exterior;
iv = 0;
pt = dyn_line->First;
while (pt)
{
/* counting how many POINTs are into the Interior Ring */
iv++;
pt = pt->Next;
}
ring = gaiaAddInteriorRing (pg, ib, iv);
iv = 0;
pt = dyn_line->First;
while (pt)
{
/* inserting any POINT into the Interior Ring */
gaiaSetPoint (ring->Coords, iv, pt->X, pt->Y);
iv++;
pt = pt->Next;
}
rg = rg->next;
ib++;
}
}
static void
clean_polygon (struct gml_params *params)
{
/* cleaning up temporary Polygon struct */
struct gml_rings_list *p;
struct gml_rings_list *pn;
if (params->polygon.exterior)
gaiaFreeDynamicLine (params->polygon.exterior);
p = params->polygon.first;
while (p)
{
pn = p->next;
free (p->ring);
free (p);
p = pn;
}
params->polygon.exterior = NULL;
params->polygon.first = NULL;
params->polygon.last = NULL;
}
static void
clean_geometry (struct gml_params *params)
{
/* cleaning up temporary Geometry struct */
if (params->geometry)
gaiaFreeGeomColl (params->geometry);
params->geometry = NULL;
clean_polygon (params);
}
static void
clean_values (struct gml_params *params)
{
/* cleaning row values */
struct gml_column *col = params->first;
while (col)
{
col->value_type = VALUE_NULL;
if (col->txt_value)
free (col->txt_value);
col->txt_value = NULL;
col = col->next;
}
clean_geometry (params);
}
static void
check_end2_fid (struct gml_params *params, const char *el)
{
/* checking if the FID tag ends here */
int ret;
int fld = 1;
struct gml_column *col;
if (strcasecmp (params->fid_tag, el) == 0)
{
params->is_fid = 0;
if (params->stmt == NULL)
return;
/* resetting the SQL prepared statement */
sqlite3_reset (params->stmt);
sqlite3_clear_bindings (params->stmt);
col = params->first;
while (col)
{
/* binding ordinary column values */
switch (col->value_type)
{
case VALUE_INT:
sqlite3_bind_int64 (params->stmt, fld, col->int_value);
break;
case VALUE_FLOAT:
sqlite3_bind_double (params->stmt, fld, col->dbl_value);
break;
case VALUE_TEXT:
sqlite3_bind_text (params->stmt, fld, col->txt_value,
strlen (col->txt_value),
SQLITE_STATIC);
break;
default:
sqlite3_bind_null (params->stmt, fld);
break;
};
fld++;
col = col->next;
}
/* setting up the latest Polygon (if any) */
polygon_set_up (params);
/* binding Geometry BLOB value */
if (params->geometry == NULL)
sqlite3_bind_null (params->stmt, fld);
else
{
unsigned char *blob;
int blob_size;
params->geometry->Srid = params->srid;
params->geometry->DeclaredType = params->declared_type;
gaiaToSpatiaLiteBlobWkb (params->geometry, &blob, &blob_size);
sqlite3_bind_blob (params->stmt, fld, blob, blob_size, free);
}
/* performing INSERT INTO */
ret = sqlite3_step (params->stmt);
clean_values (params);
if (ret == SQLITE_DONE || ret == SQLITE_ROW)
return;
fprintf (stderr, "sqlite3_step() error: INSERT INTO\n");
sqlite3_finalize (params->stmt);
params->stmt = NULL;
}
}
static void
prepare_parse_coords (struct gml_params *params, const char **attr)
{
/* setting the SRID */
int count = 0;
const char *k;
const char *v;
const char **attrib = attr;
while (*attrib != NULL)
{
if ((count % 2) == 0)
k = *attrib;
else
{
v = *attrib;
if (strcasecmp (k, "decimal") == 0)
params->coord_decimal = *v;
if (strcasecmp (k, "ts") == 0)
params->coord_ts = *v;
if (strcasecmp (k, "cs") == 0)
params->coord_cs = *v;
}
attrib++;
count++;
}
}
static void
add_point_to_geometry (struct gml_params *params, gaiaDynamicLinePtr dyn_line)
{
/* adding a POINT to current Geometry */
gaiaPointPtr pt;
if (params->geometry == NULL)
params->geometry = gaiaAllocGeomColl ();
pt = dyn_line->First;
while (pt)
{
/* inserting any POINT */
gaiaAddPointToGeomColl (params->geometry, pt->X, pt->Y);
pt = pt->Next;
}
gaiaFreeDynamicLine (dyn_line);
}
static void
add_linestring_to_geometry (struct gml_params *params,
gaiaDynamicLinePtr dyn_line)
{
/* adding a LINESTRING to current Geometry */
int iv = 0;
gaiaPointPtr pt;
gaiaLinestringPtr line;
if (params->geometry == NULL)
params->geometry = gaiaAllocGeomColl ();
pt = dyn_line->First;
while (pt)
{
/* counting how many POINTs are there */
iv++;
pt = pt->Next;
}
line = gaiaAddLinestringToGeomColl (params->geometry, iv);
iv = 0;
pt = dyn_line->First;
while (pt)
{
/* inserting any POINT into LINESTRING */
gaiaSetPoint (line->Coords, iv, pt->X, pt->Y);
iv++;
pt = pt->Next;
}
gaiaFreeDynamicLine (dyn_line);
}
static void
add_exterior_ring_to_geometry (struct gml_params *params,
gaiaDynamicLinePtr dyn_line)
{
/* adding an Exterior ring to the Polygon's temporary struct */
if (params->polygon.exterior)
gaiaFreeDynamicLine (params->polygon.exterior);
params->polygon.exterior = dyn_line;
}
static void
add_interior_ring_to_geometry (struct gml_params *params,
gaiaDynamicLinePtr dyn_line)
{
/* adding an Interior ring to the Polygon's temporary struct */
struct gml_rings_list *p = malloc (sizeof (struct gml_rings_list));
p->ring = dyn_line;
p->next = NULL;
if (params->polygon.first == NULL)
params->polygon.first = p;
if (params->polygon.last != NULL)
params->polygon.last->next = p;
params->polygon.last = p;
}
static void
parse_coords_1 (struct gml_params *params)
{
/* parsing a list of coordinates (2) */
int count = 0;
char coord[128];
double x;
double y;
char *p_out = coord;
const char *p_in = params->CharData;
int i;
gaiaDynamicLinePtr dyn_line = gaiaAllocDynamicLine ();
for (i = 0; i < params->CharDataLen; i++)
{
if (*p_in == params->coord_ts || *p_in == params->coord_cs)
{
*p_out = '\0';
count++;
if (params->coord_decimal != '.')
{
/* normalizing decimal separator */
int i;
for (i = 0; i < (int) strlen (coord); i++)
{
if (coord[i] == params->coord_decimal)
coord[i] = '.';
}
}
if (count == 1)
x = atof (coord);
else
y = atof (coord);
p_out = coord;
p_in++;
if (count > 1)
{
gaiaAppendPointToDynamicLine (dyn_line, x, y);
x = DBL_MAX;
y = DBL_MAX;
count = 0;
}
continue;
}
*p_out++ = *p_in++;
}
if (p_out != coord)
{
*p_out = '\0';
count++;
if (count == 1)
x = atof (coord);
else
y = atof (coord);
gaiaAppendPointToDynamicLine (dyn_line, x, y);
}
if (params->is_point)
add_point_to_geometry (params, dyn_line);
if (params->is_linestring)
add_linestring_to_geometry (params, dyn_line);
if (params->is_polygon)
{
if (params->is_inner_boundary)