/*!
\brief Fetches list of DB column names and types of vector map attribute table
\param Map vector map
\param field layer number
\return list of column(s) types on success
\retutn NULL on error
*/
const char *Vect_get_column_names_types(struct Map_info *Map, int field)
{
int num_dblinks, ncols, col;
struct field_info *fi;
dbDriver *driver = NULL;
dbHandle handle;
dbString table_name;
dbTable *table;
char buf[2000], temp_buf[2000];
num_dblinks = Vect_get_num_dblinks(Map);
if (num_dblinks <= 0)
return (NULL);
G_debug(3,
"Displaying column types for database connection of layer %d:",
field);
if ((fi = Vect_get_field(Map, field)) == NULL)
return (NULL);
driver = db_start_driver(fi->driver);
if (driver == NULL)
return (NULL);
db_init_handle(&handle);
db_set_handle(&handle, fi->database, NULL);
if (db_open_database(driver, &handle) != DB_OK)
return (NULL);
db_init_string(&table_name);
db_set_string(&table_name, fi->table);
if (db_describe_table(driver, &table_name, &table) != DB_OK)
return (NULL);
ncols = db_get_table_number_of_columns(table);
sprintf(buf, " ");
for (col = 0; col < ncols; col++) {
if (col == 0)
sprintf(buf, "%s(%s)",
db_get_column_name(db_get_table_column(table, col)),
db_sqltype_name(db_get_column_sqltype
(db_get_table_column(table, col))));
else {
sprintf(temp_buf, ",%s(%s)",
db_get_column_name(db_get_table_column(table, col)),
db_sqltype_name(db_get_column_sqltype
(db_get_table_column(table, col))));
strcat(buf, temp_buf);
}
}
G_debug(3, "%s", buf);
db_close_database(driver);
db_shutdown_driver(driver);
return G_store(G_chop(buf));
}
void print_columns(const struct Map_info *Map, const char *input_opt, const char *field_opt)
{
int num_dblinks, col, ncols;
struct field_info *fi;
dbDriver *driver = NULL;
dbHandle handle;
dbString table_name;
dbTable *table;
num_dblinks = Vect_get_num_dblinks(Map);
if (num_dblinks <= 0) {
G_fatal_error(_("Database connection for map <%s> is not defined in DB file"),
input_opt);
}
G_message(_("Displaying column types/names for database connection of layer <%s>:"),
field_opt);
if ((fi = Vect_get_field2(Map, field_opt)) == NULL)
G_fatal_error(_("Database connection not defined for layer <%s>"),
field_opt);
driver = db_start_driver(fi->driver);
if (driver == NULL)
G_fatal_error(_("Unable to open driver <%s>"),
fi->driver);
db_init_handle(&handle);
db_set_handle(&handle, fi->database, NULL);
if (db_open_database(driver, &handle) != DB_OK)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
fi->database, fi->driver);
db_init_string(&table_name);
db_set_string(&table_name, fi->table);
if (db_describe_table(driver, &table_name, &table) != DB_OK)
G_fatal_error(_("Unable to describe table <%s>"),
fi->table);
ncols = db_get_table_number_of_columns(table);
for (col = 0; col < ncols; col++)
fprintf(stdout, "%s|%s\n",
db_sqltype_name(db_get_column_sqltype
(db_get_table_column
(table, col))),
db_get_column_name(db_get_table_column
(table, col)));
db_close_database(driver);
db_shutdown_driver(driver);
}
/* extract custom-namespaced attributes if any */
static int mk_attribs(int cat, struct field_info *Fi, dbDriver * Driver,
dbTable * Table, int attr_cols[], int attr_size,
int do_attr)
{
int i, more;
char buf[2000];
dbString dbstring;
dbColumn *Column;
dbCursor cursor;
dbValue *Value;
/* include cat in any case */
fprintf(fpsvg, "gg:cat=\"%d\" ", cat);
/* skip attribs if none */
if (do_attr == 0) {
return 1;
}
/* create SQL-string and query attribs */
db_init_string(&dbstring);
sprintf(buf, "SELECT * FROM %s WHERE %s = %d", Fi->table, Fi->key, cat);
db_set_string(&dbstring, buf);
if (db_open_select_cursor(Driver, &dbstring, &cursor, DB_SEQUENTIAL) !=
DB_OK) {
G_fatal_error(_("Cannot select attributes for cat=%d"), cat);
}
else {
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK) {
G_fatal_error(_("Unable to fetch data from table"));
}
/* extract attribs and data if wanted */
Table = db_get_cursor_table(&cursor);
for (i = 0; i < attr_size; i++) {
Column = db_get_table_column(Table, attr_cols[i]);
Value = db_get_column_value(Column);
db_convert_column_value_to_string(Column, &dbstring);
strcpy(buf, db_get_column_name(Column));
fprintf(fpsvg, "gg:%s=\"", G_tolcase(buf));
print_escaped_for_xml(db_get_string(&dbstring));
fprintf(fpsvg, "\" ");
}
}
return 1;
}
int main(int argc, char **argv)
{
struct GModule *module;
struct Option *map_opt, *field_opt, *fs_opt, *vs_opt, *nv_opt, *col_opt,
*where_opt, *file_opt;
struct Flag *c_flag, *v_flag, *r_flag;
dbDriver *driver;
dbString sql, value_string;
dbCursor cursor;
dbTable *table;
dbColumn *column;
dbValue *value;
struct field_info *Fi;
int ncols, col, more;
struct Map_info Map;
char query[1024];
struct ilist *list_lines;
struct bound_box *min_box, *line_box;
int i, line, area, init_box, cat;
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("database"));
G_add_keyword(_("attribute table"));
module->description = _("Prints vector map attributes.");
map_opt = G_define_standard_option(G_OPT_V_MAP);
field_opt = G_define_standard_option(G_OPT_V_FIELD);
col_opt = G_define_standard_option(G_OPT_DB_COLUMNS);
where_opt = G_define_standard_option(G_OPT_DB_WHERE);
fs_opt = G_define_standard_option(G_OPT_F_SEP);
fs_opt->description = _("Output field separator");
fs_opt->guisection = _("Format");
vs_opt = G_define_standard_option(G_OPT_F_SEP);
vs_opt->key = "vs";
vs_opt->description = _("Output vertical record separator");
vs_opt->answer = NULL;
vs_opt->guisection = _("Format");
nv_opt = G_define_option();
nv_opt->key = "nv";
nv_opt->type = TYPE_STRING;
nv_opt->required = NO;
nv_opt->description = _("Null value indicator");
nv_opt->guisection = _("Format");
file_opt = G_define_standard_option(G_OPT_F_OUTPUT);
file_opt->key = "file";
file_opt->required = NO;
file_opt->description =
_("Name for output file (if omitted or \"-\" output to stdout)");
r_flag = G_define_flag();
r_flag->key = 'r';
r_flag->description =
_("Print minimal region extent of selected vector features instead of attributes");
c_flag = G_define_flag();
c_flag->key = 'c';
c_flag->description = _("Do not include column names in output");
c_flag->guisection = _("Format");
v_flag = G_define_flag();
v_flag->key = 'v';
v_flag->description = _("Vertical output (instead of horizontal)");
v_flag->guisection = _("Format");
G_gisinit(argv[0]);
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
/* set input vector map name and mapset */
if (file_opt->answer && strcmp(file_opt->answer, "-") != 0) {
if (NULL == freopen(file_opt->answer, "w", stdout)) {
G_fatal_error(_("Unable to open file <%s> for writing"), file_opt->answer);
}
}
if (r_flag->answer) {
min_box = (struct bound_box *) G_malloc(sizeof(struct bound_box));
G_zero((void *)min_box, sizeof(struct bound_box));
line_box = (struct bound_box *) G_malloc(sizeof(struct bound_box));
list_lines = Vect_new_list();
}
else {
min_box = line_box = NULL;
list_lines = NULL;
}
db_init_string(&sql);
db_init_string(&value_string);
/* open input vector */
if (!r_flag->answer)
Vect_open_old_head2(&Map, map_opt->answer, "", field_opt->answer);
else {
if (2 > Vect_open_old2(&Map, map_opt->answer, "", field_opt->answer)) {
Vect_close(&Map);
G_fatal_error(_("Unable to open vector map <%s> at topology level. "
"Flag '%c' requires topology level."),
map_opt->answer, r_flag->key);
}
}
if ((Fi = Vect_get_field2(&Map, field_opt->answer)) == NULL)
G_fatal_error(_("Database connection not defined for layer <%s>"),
field_opt->answer);
driver = db_start_driver_open_database(Fi->driver, Fi->database);
if (!driver)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
if (col_opt->answer)
sprintf(query, "SELECT %s FROM ", col_opt->answer);
else
sprintf(query, "SELECT * FROM ");
db_set_string(&sql, query);
db_append_string(&sql, Fi->table);
if (where_opt->answer) {
char *buf = NULL;
buf = G_malloc((strlen(where_opt->answer) + 8));
sprintf(buf, " WHERE %s", where_opt->answer);
db_append_string(&sql, buf);
G_free(buf);
}
if (db_open_select_cursor(driver, &sql, &cursor, DB_SEQUENTIAL) != DB_OK)
G_fatal_error(_("Unable to open select cursor"));
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
/* column names if horizontal output (ignore for -r) */
if (!v_flag->answer && !c_flag->answer && !r_flag->answer) {
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
if (col)
fprintf(stdout, "%s", fs_opt->answer);
fprintf(stdout, "%s", db_get_column_name(column));
}
fprintf(stdout, "\n");
}
init_box = 1;
/* fetch the data */
while (1) {
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK)
G_fatal_error(_("Unable to fetch data from table <%s>"),
Fi->table);
if (!more)
break;
cat = -1;
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
value = db_get_column_value(column);
if (cat < 0 && strcmp(Fi->key, db_get_column_name(column)) == 0) {
cat = db_get_value_int(value);
if (r_flag->answer)
break;
}
if (r_flag->answer)
continue;
db_convert_column_value_to_string(column, &value_string);
if (!c_flag->answer && v_flag->answer)
fprintf(stdout, "%s%s", db_get_column_name(column),
fs_opt->answer);
if (col && !v_flag->answer)
fprintf(stdout, "%s", fs_opt->answer);
if (nv_opt->answer && db_test_value_isnull(value))
fprintf(stdout, "%s", nv_opt->answer);
else
fprintf(stdout, "%s", db_get_string(&value_string));
if (v_flag->answer)
fprintf(stdout, "\n");
}
if (r_flag->answer) {
/* get minimal region extent */
Vect_cidx_find_all(&Map, Vect_get_field_number(&Map, field_opt->answer), -1, cat, list_lines);
for (i = 0; i < list_lines->n_values; i++) {
line = list_lines->value[i];
area = Vect_get_centroid_area(&Map, line);
if (area > 0) {
if (!Vect_get_area_box(&Map, area, line_box))
G_fatal_error(_("Unable to get bounding box of area %d"),
area);
}
else {
if (!Vect_get_line_box(&Map, line, line_box))
G_fatal_error(_("Unable to get bounding box of line %d"),
line);
}
if (init_box) {
Vect_box_copy(min_box, line_box);
init_box = 0;
}
else {
Vect_box_extend(min_box, line_box);
}
}
}
else {
if (!v_flag->answer)
fprintf(stdout, "\n");
else if (vs_opt->answer)
fprintf(stdout, "%s\n", vs_opt->answer);
}
}
if (r_flag->answer) {
fprintf(stdout, "n=%f\n", min_box->N);
fprintf(stdout, "s=%f\n", min_box->S);
fprintf(stdout, "w=%f\n", min_box->W);
fprintf(stdout, "e=%f\n", min_box->E);
if (Vect_is_3d(&Map)) {
fprintf(stdout, "t=%f\n", min_box->T);
fprintf(stdout, "b=%f\n", min_box->B);
}
fflush(stdout);
G_free((void *)min_box);
G_free((void *)line_box);
Vect_destroy_list(list_lines);
}
db_close_cursor(&cursor);
db_close_database_shutdown_driver(driver);
Vect_close(&Map);
exit(EXIT_SUCCESS);
}
int write_attributes(dbDriver *driver, int cat, const struct field_info *Fi,
OGRLayerH Ogr_layer, OGRFeatureH Ogr_feature)
{
int j, ogrfieldnum;
char buf[2000];
int ncol, sqltype, ctype, ogrtype, more;
const char *fidcol, *colname;
dbTable *table;
dbString dbstring;
dbColumn *column;
dbCursor cursor;
dbValue *value;
OGRFieldDefnH hFieldDefn;
G_debug(3, "write_attributes(): cat = %d", cat);
if (cat < 0) {
G_warning(_("Feature without category of layer %d"), Fi->number);
return 0;
}
db_init_string(&dbstring);
/* read & set attributes */
sprintf(buf, "SELECT * FROM %s WHERE %s = %d", Fi->table, Fi->key,
cat);
G_debug(4, "SQL: %s", buf);
db_set_string(&dbstring, buf);
/* select data */
if (db_open_select_cursor(driver, &dbstring, &cursor, DB_SEQUENTIAL) != DB_OK) {
G_fatal_error(_("Unable to select attributes for category %d"),
cat);
}
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK) {
G_fatal_error(_("Unable to fetch data from table <%s>"),
Fi->table);
}
if (!more) {
G_warning(_("No database record for category %d, "
"no attributes will be written"),
cat);
return -1;
}
fidcol = OGR_L_GetFIDColumn(Ogr_layer);
table = db_get_cursor_table(&cursor);
ncol = db_get_table_number_of_columns(table);
for (j = 0; j < ncol; j++) {
column = db_get_table_column(table, j);
colname = db_get_column_name(column);
if (fidcol && *fidcol && strcmp(colname, fidcol) == 0) {
/* skip fid column */
continue;
}
value = db_get_column_value(column);
/* for debug only */
db_convert_column_value_to_string(column, &dbstring);
G_debug(2, "col %d : val = %s", j,
db_get_string(&dbstring));
sqltype = db_get_column_sqltype(column);
ctype = db_sqltype_to_Ctype(sqltype);
ogrtype = sqltype_to_ogrtype(sqltype);
G_debug(2, " colctype = %d", ctype);
ogrfieldnum = OGR_F_GetFieldIndex(Ogr_feature, colname);
if (ogrfieldnum < 0) {
/* create field if not exists */
hFieldDefn = OGR_Fld_Create(colname, ogrtype);
if (OGR_L_CreateField(Ogr_layer, hFieldDefn, TRUE) != OGRERR_NONE)
G_warning(_("Unable to create field <%s>"), colname);
ogrfieldnum = OGR_F_GetFieldIndex(Ogr_feature, colname);
}
/* Reset */
OGR_F_UnsetField(Ogr_feature, ogrfieldnum);
/* prevent writing NULL values */
if (!db_test_value_isnull(value)) {
switch (ctype) {
case DB_C_TYPE_INT:
OGR_F_SetFieldInteger(Ogr_feature, ogrfieldnum,
db_get_value_int(value));
break;
case DB_C_TYPE_DOUBLE:
OGR_F_SetFieldDouble(Ogr_feature, ogrfieldnum,
db_get_value_double(value));
break;
case DB_C_TYPE_STRING:
OGR_F_SetFieldString(Ogr_feature, ogrfieldnum,
db_get_value_string(value));
break;
case DB_C_TYPE_DATETIME:
db_convert_column_value_to_string(column,
&dbstring);
OGR_F_SetFieldString(Ogr_feature, ogrfieldnum,
db_get_string(&dbstring));
break;
}
}
}
db_close_cursor (&cursor);
db_free_string(&dbstring);
return 1;
}
int main(int argc, char *argv[])
{
int i, j, precision, field, type, nlines;
int do_attr = 0, attr_cols[8], attr_size = 0, db_open = 0, cnt = 0;
double width, radius;
struct Option *in_opt, *out_opt, *prec_opt, *type_opt, *attr_opt,
*field_opt;
struct GModule *module;
struct Map_info In;
struct bound_box box;
/* vector */
struct line_pnts *Points;
struct line_cats *Cats;
/* attribs */
dbDriver *Driver = NULL;
dbHandle handle;
dbTable *Table;
dbString dbstring;
struct field_info *Fi;
/* init */
G_gisinit(argv[0]);
/* parse command-line */
module = G_define_module();
module->description = _("Exports a vector map to SVG file.");
G_add_keyword(_("vector"));
G_add_keyword(_("export"));
in_opt = G_define_standard_option(G_OPT_V_INPUT);
field_opt = G_define_standard_option(G_OPT_V_FIELD_ALL);
out_opt = G_define_standard_option(G_OPT_F_OUTPUT);
out_opt->description = _("Name for SVG output file");
type_opt = G_define_option();
type_opt->key = "type";
type_opt->type = TYPE_STRING;
type_opt->required = YES;
type_opt->multiple = NO;
type_opt->answer = "poly";
type_opt->options = "poly,line,point";
type_opt->label = _("Output type");
type_opt->description = _("Defines which feature-type will be extracted");
prec_opt = G_define_option();
prec_opt->key = "precision";
prec_opt->type = TYPE_INTEGER;
prec_opt->required = NO;
prec_opt->answer = "6";
prec_opt->multiple = NO;
prec_opt->description = _("Coordinate precision");
attr_opt = G_define_standard_option(G_OPT_DB_COLUMNS);
attr_opt->key = "attribute";
attr_opt->required = NO;
attr_opt->multiple = YES;
attr_opt->description = _("Attribute(s) to include in output SVG");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
if (type_opt->answer[0] == 'l') {
type = TYPE_LINE;
}
else {
if (type_opt->answer[2] == 'l')
type = TYPE_POLY;
else
type = TYPE_POINT;
}
/* override coordinate precision if any */
precision = atof(prec_opt->answer);
if (precision < 0) {
G_fatal_error(_("Precision must not be negative"));
}
if (precision > 15) {
G_fatal_error(_("Precision must not be higher than 15"));
}
/* open input vector */
Vect_set_open_level(2);
if (Vect_open_old2(&In, in_opt->answer, "", field_opt->answer) < 0)
G_fatal_error(_("Unable to open vector map <%s>"), in_opt->answer);
/* parse field number */
field = Vect_get_field_number(&In, field_opt->answer);
/* open db-driver to attribs */
db_init_string(&dbstring);
/* check for requested field */
Fi = Vect_get_field(&In, field);
if (Fi != NULL) {
Driver = db_start_driver(Fi->driver);
if (Driver == NULL) {
G_fatal_error(_("Unable to start driver <%s>"), Fi->driver);
}
/* open db */
db_init_handle(&handle);
db_set_handle(&handle, Fi->database, NULL);
if (db_open_database(Driver, &handle) != DB_OK) {
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
}
db_set_string(&dbstring, Fi->table);
if (db_describe_table(Driver, &dbstring, &Table) != DB_OK) {
G_fatal_error(_("Unable to describe table <%s>"), Fi->table);
}
/* define column-indices for columns to extract */
dbColumn *Column;
for (i = 0; i < db_get_table_number_of_columns(Table); i++) {
Column = db_get_table_column(Table, i);
if (attr_opt->answer != NULL) {
for (j = 0; attr_opt->answers[j] != NULL; j++) {
if (G_strcasecmp(attr_opt->answers[j],
db_get_column_name(Column)) == 0) {
attr_cols[attr_size] = i;
attr_size += 1;
break;
}
}
}
}
do_attr = 1;
db_open = 1;
}
/* parse bounding box and define default stroke-width, radius */
Vect_get_map_box(&In, &box);
if ((box.E - box.W) >= (box.N - box.S)) {
radius = (box.E - box.W) * RADIUS_SCALE;
width = (box.E - box.W) * WIDTH_SCALE;
}
else {
radius = (box.N - box.S) * RADIUS_SCALE;
width = (box.N - box.S) * WIDTH_SCALE;
}
/* open output SVG-file and print SVG-header with viewBox and Namenspaces */
if ((fpsvg = fopen(out_opt->answer, "w")) == NULL) {
G_fatal_error(_("Unable to create SVG file <%s>"), out_opt->answer);
}
fprintf(fpsvg, "<svg xmlns=\"%s\" xmlns:xlink=\"%s\" xmlns:gg=\"%s\" ",
SVG_NS, XLINK_NS, GRASS_NS);
fprintf(fpsvg, "viewBox=\"%.*f %.*f %.*f %.*f\">\n",
precision, box.W,
precision, box.N * -1,
precision, box.E - box.W, precision, box.N - box.S);
fprintf(fpsvg, "<title>v.out.svg %s %s</title>\n", in_opt->answer,
out_opt->answer);
nlines = Vect_get_num_lines(&In);
/* extract areas if any or requested */
if (type == TYPE_POLY) {
if (Vect_get_num_areas(&In) == 0) {
G_warning(_("No areas found, skipping %s"), "type=poly");
}
else {
int nareas;
nareas = Vect_get_num_areas(&In);
/* extract area as paths */
fprintf(fpsvg,
" <g id=\"%s\" fill=\"#CCC\" stroke=\"#000\" stroke-width=\"%.*f\" >\n",
G_Areas, precision, width);
for (i = 1; i <= nareas; i++) {
G_percent(i, nareas, 5);
/* skip areas without centroid */
if (Vect_get_area_centroid(&In, i) == 0) {
G_warning(_("Skipping area %d without centroid"), i);
continue;
}
/* extract attribs, parse area */
Vect_get_area_cats(&In, i, Cats);
fprintf(fpsvg, " <path ");
if (Cats->n_cats > 0) {
mk_attribs(Cats->cat[0], Fi, Driver, Table, attr_cols,
attr_size, do_attr);
}
fprintf(fpsvg, "d=\"");
Vect_get_area_points(&In, i, Points);
mk_path(Points, precision);
/* append islands if any within current path */
for (j = 0; j < Vect_get_area_num_isles(&In, i); j++) {
Vect_get_isle_points(&In, Vect_get_area_isle(&In, i, j),
Points);
mk_path(Points, precision);
}
fprintf(fpsvg, "\" />\n");
cnt += 1;
}
fprintf(fpsvg, " </g>\n");
G_message(_("%d areas extracted"), cnt);
}
}
/* extract points if requested */
if (type == TYPE_POINT) {
if (Vect_get_num_primitives(&In, GV_POINTS) == 0) {
G_warning(_("No points found, skipping %s"), "type=point");
}
else {
/* extract points as circles */
fprintf(fpsvg, " <g id=\"%s\" fill=\"#FC0\" stroke=\"#000\" "
"stroke-width=\"%.*f\" >\n", G_Points, precision, width);
for (i = 1; i <= nlines; i++) {
G_percent(i, nlines, 5);
if (!(Vect_read_line(&In, Points, Cats, i) & GV_POINTS))
continue;
if (field != -1 && !Vect_cat_get(Cats, field, NULL))
continue;
for (j = 0; j < Points->n_points; j++) {
fprintf(fpsvg, " <circle ");
if (Cats->n_cats > 0) {
mk_attribs(Cats->cat[j], Fi, Driver, Table, attr_cols,
attr_size, do_attr);
}
fprintf(fpsvg, "cx=\"%.*f\" cy=\"%.*f\" r=\"%.*f\" />\n",
precision, Points->x[j],
precision, Points->y[j] * -1, precision, radius);
cnt += 1;
}
}
fprintf(fpsvg, " </g>\n");
G_message(_("%d points extracted"), cnt);
}
}
/* extract lines if requested */
if (type == TYPE_LINE) {
if (Vect_get_num_primitives(&In, GV_LINES) == 0) {
G_warning(_("No lines found, skipping %s"), "type=line");
}
else {
/* extract lines as paths */
fprintf(fpsvg, " <g id=\"%s\" fill=\"none\" stroke=\"#000\" "
"stroke-width=\"%.*f\" >\n", G_Lines, precision, width);
for (i = 1; i <= nlines; i++) {
G_percent(i, nlines, 5);
if (!(Vect_read_line(&In, Points, Cats, i) & GV_LINES))
continue;
if (field != -1 && !Vect_cat_get(Cats, field, NULL))
continue;
fprintf(fpsvg, " <path ");
if (Cats->n_cats > 0) {
mk_attribs(Cats->cat[0], Fi, Driver, Table,
attr_cols, attr_size, do_attr);
}
fprintf(fpsvg, "d=\"");
mk_path(Points, precision);
fprintf(fpsvg, "\" />\n");
cnt += 1;
}
fprintf(fpsvg, " </g>\n");
G_message(_("%d lines extracted"), cnt);
}
}
/* finish code */
fprintf(fpsvg, "</svg>\n");
if (db_open == 1) {
/* close database handle */
db_close_database(Driver);
db_shutdown_driver(Driver);
}
/* close SVG-file */
fclose(fpsvg);
exit(EXIT_SUCCESS);
}
int db__copy_table(const char *from_drvname, const char *from_dbname,
const char *from_tblname, const char *to_drvname,
const char *to_dbname, const char *to_tblname,
const char *where, const char *select, const char *selcol,
int *ivals, int nvals)
{
int col, ncols, sqltype, ctype, more, selcol_found;
char buf[1000];
int *ivalues;
dbHandle from_handle, to_handle;
dbString tblname, sql;
dbString value_string;
dbString *tblnames;
dbTable *table, *out_table;
dbCursor cursor;
dbColumn *column;
dbValue *value;
const char *colname;
dbDriver *from_driver, *to_driver;
int count, i;
G_debug(3, "db_copy_table():\n from driver = %s, db = %s, table = %s\n"
" to driver = %s, db = %s, table = %s, where = %s, select = %s",
from_drvname, from_dbname, from_tblname, to_drvname, to_dbname,
to_tblname, where, select);
db_init_handle(&from_handle);
db_init_handle(&to_handle);
db_init_string(&tblname);
db_init_string(&sql);
db_init_string(&value_string);
/* Make a copy of input values and sort it */
if (ivals) {
ivalues = (int *)G_malloc(nvals * sizeof(int));
memcpy(ivalues, ivals, nvals * sizeof(int));
qsort((void *)ivalues, nvals, sizeof(int), cmp);
}
/* Open input driver and database */
from_driver = db_start_driver(from_drvname);
if (from_driver == NULL) {
G_warning(_("Unable to start driver <%s>"), from_drvname);
return DB_FAILED;
}
db_set_handle(&from_handle, from_dbname, NULL);
if (db_open_database(from_driver, &from_handle) != DB_OK) {
G_warning(_("Unable to open database <%s> by driver <%s>"),
from_dbname, from_drvname);
db_close_database_shutdown_driver(from_driver);
return DB_FAILED;
}
/* Open output driver and database */
if (strcmp(from_drvname, to_drvname) == 0
&& strcmp(from_dbname, to_dbname) == 0) {
G_debug(3, "Use the same driver");
to_driver = from_driver;
}
else {
to_driver = db_start_driver(to_drvname);
if (to_driver == NULL) {
G_warning(_("Unable to start driver <%s>"), to_drvname);
db_close_database_shutdown_driver(from_driver);
return DB_FAILED;
}
db_set_handle(&to_handle, to_dbname, NULL);
if (db_open_database(to_driver, &to_handle) != DB_OK) {
G_warning(_("Unable to open database <%s> by driver <%s>"),
to_dbname, to_drvname);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
}
db_begin_transaction(to_driver);
/* Because in SQLite3 an opened cursor is no more valid
if 'schema' is modified (create table), we have to open
cursor twice */
/* test if the table exists */
if (db_list_tables(to_driver, &tblnames, &count, 0) != DB_OK) {
G_warning(_("Unable to get list tables in database <%s>"),
to_dbname);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver)
db_close_database_shutdown_driver(from_driver);
return DB_FAILED;
}
for (i = 0; i < count; i++) {
const char *tblname = db_get_string(&tblnames[i]);
if (strcmp(to_tblname, tblname) == 0) {
G_warning(_("Table <%s> already exists in database <%s>"),
to_tblname, to_dbname);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver)
db_close_database_shutdown_driver(from_driver);
return DB_FAILED;
}
}
/* Create new table */
/* Open cursor for data structure */
if (select) {
db_set_string(&sql, select);
/* TODO!: cannot use this because it will not work if a query
* ends with 'group by' for example */
/*
tmp = strdup ( select );
G_tolcase ( tmp );
if ( !strstr( tmp,"where") )
{
db_append_string ( &sql, " where 0 = 1");
}
else
{
db_append_string ( &sql, " and 0 = 1");
}
free (tmp);
*/
}
else {
db_set_string(&sql, "select * from ");
db_append_string(&sql, from_tblname);
db_append_string(&sql, " where 0 = 1"); /* to get no data */
}
G_debug(3, db_get_string(&sql));
if (db_open_select_cursor(from_driver, &sql, &cursor, DB_SEQUENTIAL) !=
DB_OK) {
G_warning(_("Unable to open select cursor: '%s'"),
db_get_string(&sql));
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
G_debug(3, "Select cursor opened");
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
G_debug(3, "ncols = %d", ncols);
out_table = db_alloc_table(ncols);
db_set_table_name(out_table, to_tblname);
selcol_found = 0;
for (col = 0; col < ncols; col++) {
dbColumn *out_column;
column = db_get_table_column(table, col);
colname = db_get_column_name(column);
sqltype = db_get_column_sqltype(column);
ctype = db_sqltype_to_Ctype(sqltype);
G_debug(3, "%s (%s)", colname, db_sqltype_name(sqltype));
out_column = db_get_table_column(out_table, col);
if (selcol && G_strcasecmp(colname, selcol) == 0) {
if (ctype != DB_C_TYPE_INT)
G_fatal_error(_("Column <%s> is not integer"),
colname);
selcol_found = 1;
}
db_set_column_name(out_column, db_get_column_name(column));
db_set_column_description(out_column,
db_get_column_description(column));
db_set_column_sqltype(out_column, db_get_column_sqltype(column));
db_set_column_length(out_column, db_get_column_length(column));
db_set_column_precision(out_column, db_get_column_precision(column));
db_set_column_scale(out_column, db_get_column_scale(column));
}
db_close_cursor(&cursor);
if (selcol && !selcol_found)
G_fatal_error(_("Column <%s> not found"), selcol);
if (db_create_table(to_driver, out_table) != DB_OK) {
G_warning(_("Unable to create table <%s>"),
to_tblname);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
/* Open cursor with data */
if (select) {
db_set_string(&sql, select);
}
else {
db_set_string(&sql, "select * from ");
db_append_string(&sql, from_tblname);
if (where) {
db_append_string(&sql, " where ");
db_append_string(&sql, where);
}
}
G_debug(3, db_get_string(&sql));
if (db_open_select_cursor(from_driver, &sql, &cursor, DB_SEQUENTIAL) !=
DB_OK) {
G_warning(_("Unable to open select cursor: '%s'"),
db_get_string(&sql));
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
G_debug(3, "Select cursor opened");
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
G_debug(3, "ncols = %d", ncols);
/* Copy all rows */
while (1) {
int select;
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK) {
G_warning(_("Unable to fetch data from table <%s>"),
from_tblname);
db_close_cursor(&cursor);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
if (!more)
break;
sprintf(buf, "insert into %s values ( ", to_tblname);
db_set_string(&sql, buf);
select = 1;
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
colname = db_get_column_name(column);
sqltype = db_get_column_sqltype(column);
ctype = db_sqltype_to_Ctype(sqltype);
value = db_get_column_value(column);
if (selcol && G_strcasecmp(colname, selcol) == 0) {
if (db_test_value_isnull(value))
continue;
if (!bsearch(&(value->i), ivalues, nvals, sizeof(int), cmp)) {
select = 0;
break;
}
}
if (col > 0)
db_append_string(&sql, ", ");
db_convert_value_to_string(value, sqltype, &value_string);
switch (ctype) {
case DB_C_TYPE_STRING:
case DB_C_TYPE_DATETIME:
if (db_test_value_isnull(value)) {
db_append_string(&sql, "null");
}
else {
db_double_quote_string(&value_string);
db_append_string(&sql, "'");
db_append_string(&sql, db_get_string(&value_string));
db_append_string(&sql, "'");
}
break;
case DB_C_TYPE_INT:
case DB_C_TYPE_DOUBLE:
if (db_test_value_isnull(value)) {
db_append_string(&sql, "null");
}
else {
db_append_string(&sql, db_get_string(&value_string));
}
break;
default:
G_warning(_("Unknown column type (column <%s>)"),
colname);
db_close_cursor(&cursor);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
}
if (!select)
continue;
db_append_string(&sql, ")");
G_debug(3, db_get_string(&sql));
if (db_execute_immediate(to_driver, &sql) != DB_OK) {
G_warning("Unable to insert new record: '%s'",
db_get_string(&sql));
db_close_cursor(&cursor);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_FAILED;
}
}
if (selcol)
G_free(ivalues);
G_debug(3, "Table copy OK");
db_close_cursor(&cursor);
db_commit_transaction(to_driver);
db_close_database_shutdown_driver(to_driver);
if (from_driver != to_driver) {
db_close_database_shutdown_driver(from_driver);
}
return DB_OK;
}
OGRGRASSLayer::OGRGRASSLayer( int layerIndex, struct Map_info * map )
{
CPLDebug ( "GRASS", "OGRGRASSLayer::OGRGRASSLayer layerIndex = %d", layerIndex );
iLayerIndex = layerIndex;
poMap = map;
poSRS = NULL;
iNextId = 0;
poPoints = Vect_new_line_struct();
poCats = Vect_new_cats_struct();
pszQuery = NULL;
paQueryMatch = NULL;
paSpatialMatch = NULL;
iLayer = Vect_cidx_get_field_number ( poMap, iLayerIndex);
CPLDebug ( "GRASS", "iLayer = %d", iLayer );
poLink = Vect_get_field ( poMap, iLayer ); // May be NULL if not defined
// Layer name
if ( poLink && poLink->name )
{
pszName = CPLStrdup( poLink->name );
}
else
{
char buf[20];
sprintf ( buf, "%d", iLayer );
pszName = CPLStrdup( buf );
}
// Because we don't represent centroids as any simple feature, we have to scan
// category index and create index of feature IDs pointing to category index
nTotalCount = Vect_cidx_get_type_count(poMap,iLayer, GV_POINT|GV_LINES|GV_AREA);
CPLDebug ( "GRASS", "nTotalCount = %d", nTotalCount );
paFeatureIndex = (int *) CPLMalloc ( nTotalCount * sizeof(int) );
int n = Vect_cidx_get_type_count(poMap,iLayer, GV_POINTS|GV_LINES|GV_AREA);
int cnt = 0;
for ( int i = 0; i < n; i++ )
{
int cat,type, id;
Vect_cidx_get_cat_by_index ( poMap, iLayerIndex, i, &cat, &type, &id );
if ( !( type & (GV_POINT|GV_LINES|GV_AREA) ) ) continue;
paFeatureIndex[cnt++] = i;
}
poFeatureDefn = new OGRFeatureDefn( pszName );
poFeatureDefn->Reference();
// Get type definition
int nTypes = Vect_cidx_get_num_types_by_index ( poMap, iLayerIndex );
int types = 0;
for ( int i = 0; i < nTypes; i++ ) {
int type, count;
Vect_cidx_get_type_count_by_index ( poMap, iLayerIndex, i, &type, &count);
if ( !(type & (GV_POINT|GV_LINES|GV_AREA) ) ) continue;
types |= type;
CPLDebug ( "GRASS", "type = %d types = %d", type, types );
}
OGRwkbGeometryType eGeomType = wkbUnknown;
if ( types == GV_LINE || types == GV_BOUNDARY || types == GV_LINES )
{
eGeomType = wkbLineString;
}
else if ( types == GV_POINT )
{
eGeomType = wkbPoint;
}
else if ( types == GV_AREA )
{
CPLDebug ( "GRASS", "set wkbPolygon" );
eGeomType = wkbPolygon;
}
if (Vect_is_3d(poMap))
poFeatureDefn->SetGeomType ( (OGRwkbGeometryType)(eGeomType | wkb25DBit) );
else
poFeatureDefn->SetGeomType ( eGeomType );
// Get attributes definition
poDbString = (dbString*) CPLMalloc ( sizeof(dbString) );
poCursor = (dbCursor*) CPLMalloc ( sizeof(dbCursor) );
bCursorOpened = FALSE;
poDriver = NULL;
bHaveAttributes = false;
db_init_string ( poDbString );
if ( poLink )
{
if ( StartDbDriver() )
{
db_set_string ( poDbString, poLink->table );
dbTable *table;
if ( db_describe_table ( poDriver, poDbString, &table) == DB_OK )
{
nFields = db_get_table_number_of_columns ( table );
iCatField = -1;
for ( int i = 0; i < nFields; i++)
{
dbColumn *column = db_get_table_column ( table, i );
int ctype = db_sqltype_to_Ctype ( db_get_column_sqltype(column) );
OGRFieldType ogrFtype = OFTInteger;
switch ( ctype ) {
case DB_C_TYPE_INT:
ogrFtype = OFTInteger;
break;
case DB_C_TYPE_DOUBLE:
ogrFtype = OFTReal;
break;
case DB_C_TYPE_STRING:
ogrFtype = OFTString;
break;
case DB_C_TYPE_DATETIME:
ogrFtype = OFTDateTime;
break;
}
CPLDebug ( "GRASS", "column = %s type = %d",
db_get_column_name(column), ctype );
OGRFieldDefn oField ( db_get_column_name(column), ogrFtype );
poFeatureDefn->AddFieldDefn( &oField );
if ( G_strcasecmp(db_get_column_name(column),poLink->key) == 0 )
{
iCatField = i;
}
}
if ( iCatField >= 0 )
{
bHaveAttributes = true;
}
else
{
CPLError( CE_Failure, CPLE_AppDefined, "Cannot find key field" );
db_close_database_shutdown_driver ( poDriver );
poDriver = NULL;
}
}
else
{
CPLError( CE_Failure, CPLE_AppDefined, "Cannot describe table %s",
poLink->table );
}
db_close_database_shutdown_driver ( poDriver );
poDriver = NULL;
}
}
if ( !bHaveAttributes && iLayer > 0 ) // Because features in layer 0 have no cats
{
OGRFieldDefn oField("cat", OFTInteger);
poFeatureDefn->AddFieldDefn( &oField );
}
if ( getenv("GISBASE") ) // We have some projection info in GISBASE
{
struct Key_Value *projinfo, *projunits;
// Note: we dont have to reset GISDBASE and LOCATION_NAME because
// OGRGRASSLayer constructor is called from OGRGRASSDataSource::Open
// where those variables are set
projinfo = G_get_projinfo();
projunits = G_get_projunits();
char *srsWkt = GPJ_grass_to_wkt ( projinfo, projunits, 0, 0);
if ( srsWkt )
{
poSRS = new OGRSpatialReference ( srsWkt );
CPLFree ( srsWkt );
}
G_free_key_value(projinfo);
G_free_key_value(projunits);
}
}
/*!
\brief Fetch record
\param cn pointer to dbCursor
\param position position indicator (DB_NEXT, DB_FIRST, DB_LAST, etc)
\param[out] more 0 for no record fetched otherwise 1
\return DB_OK on success
\return DB_FAILED on error
*/
int db__driver_fetch(dbCursor * cn, int position, int *more)
{
int i, col;
int ogrType, sqlType;
dbToken token;
dbTable *table;
dbColumn *column;
dbValue *value;
cursor *c;
G_debug(3, "db_driver_fetch()");
/* get cursor token */
token = db_get_cursor_token(cn);
/* get the cursor by its token */
if (!(c = (cursor *) db_find_token(token))) {
append_error(_("Cursor not found"));
report_error();
return DB_FAILED;
}
/* fetch on position */
switch (position) {
case DB_NEXT:
G_debug(4, "DB_NEXT:");
if (c->hFeature)
OGR_F_Destroy(c->hFeature);
c->hFeature = OGR_L_GetNextFeature(c->hLayer);
break;
case DB_CURRENT:
break;
case DB_PREVIOUS:
append_error(_("DB_PREVIOUS not supported"));
report_error();
return DB_FAILED;
break;
case DB_FIRST:
OGR_L_ResetReading(c->hLayer);
if (c->hFeature)
OGR_F_Destroy(c->hFeature);
c->hFeature = OGR_L_GetNextFeature(c->hLayer);
break;
case DB_LAST:
append_error(_("DB_LAST not supported"));
report_error();
return DB_FAILED;
break;
};
if (c->hFeature == NULL) {
*more = 0;
return DB_OK;
}
*more = 1;
/* get the data out of the descriptor into the table */
table = db_get_cursor_table(cn);
/* check fid column */
if (strlen(OGR_L_GetFIDColumn(c->hLayer)) > 0) {
column = db_get_table_column(table, 0);
ogrType = db_get_column_host_type(column);
sqlType = db_get_column_sqltype(column);
value = db_get_column_value(column);
value->i = OGR_F_GetFID(c->hFeature);
G_debug(3, "fidcol '%s': ogrType %d, sqlType %d: val = %d",
db_get_column_name(column), ogrType, sqlType, value->i);
col = 0;
}
else {
col = -1;
}
/* loop attributes */
for (i = 0; i < c->ncols; i++) {
if (!(c->cols[i])) {
continue;
} /* unknown type */
col++;
column = db_get_table_column(table, col);
ogrType = db_get_column_host_type(column);
sqlType = db_get_column_sqltype(column);
value = db_get_column_value(column);
db_zero_string(&value->s);
/* Is null? */
if (OGR_F_IsFieldSet(c->hFeature, i)) {
value->isNull = 0;
}
else {
value->isNull = 1;
continue;
}
G_debug(3, "col %d, ogrType %d, sqlType %d: val = '%s'",
col, ogrType, sqlType, OGR_F_GetFieldAsString(c->hFeature,
i));
switch (ogrType) {
case OFTInteger:
value->i = OGR_F_GetFieldAsInteger(c->hFeature, i);
break;
case OFTReal:
value->d = OGR_F_GetFieldAsDouble(c->hFeature, i);
break;
case OFTString:
case OFTDate:
case OFTTime:
case OFTDateTime:
db_set_string(&(value->s),
(char *)OGR_F_GetFieldAsString(c->hFeature, i));
break;
default:
G_warning(_("Unknown type"));
break;
}
}
G_debug(4, "Row fetched");
return DB_OK;
}
dbDriver *create_table(OGRLayerH hLayer, const struct field_info *Fi)
{
int col, ncols;
int sqltype, ogrtype, length;
const char *colname;
dbDriver *driver;
dbHandle handle;
dbCursor cursor;
dbTable *table;
dbColumn *column;
dbString sql;
OGRFieldDefnH hFieldDefn;
OGRFeatureDefnH hFeatureDefn;
db_init_string(&sql);
db_init_handle(&handle);
driver = db_start_driver(Fi->driver);
if (!driver) {
G_warning(_("Unable to start driver <%s>"), Fi->driver);
return NULL;
}
db_set_handle(&handle, Fi->database, NULL);
if (db_open_database(driver, &handle) != DB_OK) {
G_warning(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
db_close_database_shutdown_driver(driver);
return NULL;
}
/* to get no data */
db_set_string(&sql, "select * from ");
db_append_string(&sql, Fi->table);
db_append_string(&sql, " where 0 = 1");
if (db_open_select_cursor(driver, &sql, &cursor, DB_SEQUENTIAL) !=
DB_OK) {
G_warning(_("Unable to open select cursor: '%s'"),
db_get_string(&sql));
db_close_database_shutdown_driver(driver);
return NULL;
}
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
hFeatureDefn = OGR_L_GetLayerDefn(hLayer);
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
colname = db_get_column_name(column);
sqltype = db_get_column_sqltype(column);
ogrtype = sqltype_to_ogrtype(sqltype);
length = db_get_column_length(column);
if (strcmp(OGR_L_GetFIDColumn(hLayer), colname) == 0 ||
OGR_FD_GetFieldIndex(hFeatureDefn, colname) > -1) {
/* field already exists */
continue;
}
hFieldDefn = OGR_Fld_Create(colname, ogrtype);
/* GDAL 1.9.0 (r22968) uses VARCHAR instead of CHAR */
if (ogrtype == OFTString && length > 0)
OGR_Fld_SetWidth(hFieldDefn, length);
if (OGR_L_CreateField(hLayer, hFieldDefn, TRUE) != OGRERR_NONE) {
G_warning(_("Creating field <%s> failed"), colname);
db_close_database_shutdown_driver(driver);
return NULL;
}
OGR_Fld_Destroy(hFieldDefn);
}
return driver;
}
int sel(dbDriver * driver, dbString * stmt)
{
dbCursor cursor;
dbTable *table;
dbColumn *column;
dbValue *value;
dbString value_string;
int col, ncols;
int more;
if (db_open_select_cursor(driver, stmt, &cursor, DB_SEQUENTIAL) != DB_OK)
return DB_FAILED;
if (parms.test_only)
return DB_OK;
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
if (parms.d) {
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
print_column_definition(column);
}
return DB_OK;
}
if (parms.output && strcmp(parms.output, "-") != 0) {
if (NULL == freopen(parms.output, "w", stdout)) {
G_fatal_error(_("Unable to open file <%s> for writing"), parms.output);
}
}
db_init_string(&value_string);
/* column names if horizontal output */
if (parms.h && parms.c) {
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
if (col)
fprintf(stdout, "%s", parms.fs);
fprintf(stdout, "%s", db_get_column_name(column));
}
fprintf(stdout, "\n");
}
/* fetch the data */
while (TRUE) {
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK)
return DB_FAILED;
if (!more)
break;
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
value = db_get_column_value(column);
db_convert_column_value_to_string(column, &value_string);
if (parms.c && !parms.h)
fprintf(stdout, "%s%s", db_get_column_name(column), parms.fs);
if (col && parms.h)
fprintf(stdout, "%s", parms.fs);
if (parms.nv && db_test_value_isnull(value))
fprintf(stdout, "%s", parms.nv);
else
fprintf(stdout, "%s", db_get_string(&value_string));
if (!parms.h)
fprintf(stdout, "\n");
}
if (parms.h)
fprintf(stdout, "\n");
else if (parms.vs)
fprintf(stdout, "%s\n", parms.vs);
}
return DB_OK;
}
struct Map_info *G_sites_open_old(const char *name, const char *mapset)
{
struct Map_info *Map;
struct field_info *fi;
int more, nrows, row, ncols, col, ndbl, nstr, adbl, astr, ctype;
SITE_ATT *sa;
dbDriver *driver;
dbString stmt;
dbCursor cursor;
dbTable *table;
dbColumn *column;
dbValue *value;
G_message(
_("Dev note: Adapted sites library used for vector points. "
"(module should be updated to GRASS 6 vector library)"));
Map = (struct Map_info *)G_malloc(sizeof(struct Map_info));
Vect_set_open_level(1);
Vect_open_old(Map, name, mapset);
G_debug(1, "Vector map opened");
/* Load attributes */
Map->site_att = NULL;
Map->n_site_att = 0;
Map->n_site_dbl = 0;
Map->n_site_str = 0;
fi = Vect_get_field(Map, 1);
if (fi == NULL) { /* not attribute table */
G_debug(1, "No attribute table");
return Map;
}
driver = db_start_driver_open_database(fi->driver, fi->database);
if (driver == NULL)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
fi->database,
fi->driver);
db_init_string(&stmt);
db_set_string(&stmt, "select * from ");
db_append_string(&stmt, fi->table);
if (db_open_select_cursor(driver, &stmt, &cursor, DB_SEQUENTIAL) != DB_OK)
G_fatal_error(_("Unable to open select cursor: '%s'"),
db_get_string(&stmt));
nrows = db_get_num_rows(&cursor);
G_debug(1, "%d rows selected from vector attribute table", nrows);
Map->site_att = (SITE_ATT *) malloc(nrows * sizeof(SITE_ATT));
Map->n_site_att = nrows;
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
row = 0;
adbl = astr = 0;
while (1) {
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK)
G_fatal_error(_("Cannot fetch row"));
if (!more)
break;
/* Get number of each type */
if (row == 0) {
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
ctype = db_sqltype_to_Ctype(db_get_column_sqltype(column));
if (strcmp(db_get_column_name(column), fi->key) == 0)
continue;
switch (ctype) {
case DB_C_TYPE_INT:
case DB_C_TYPE_DOUBLE:
adbl++;
break;
case DB_C_TYPE_STRING:
case DB_C_TYPE_DATETIME:
astr++;
break;
}
}
Map->n_site_dbl = adbl;
Map->n_site_str = astr;
G_debug(1, "adbl = %d astr = %d", adbl, astr);
}
sa = &(Map->site_att[row]);
sa->dbl = (double *)malloc(adbl * sizeof(double));
sa->str = (char **)malloc(astr * sizeof(char *));
ndbl = nstr = 0;
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
ctype = db_sqltype_to_Ctype(db_get_column_sqltype(column));
value = db_get_column_value(column);
if (strcmp(db_get_column_name(column), fi->key) == 0) {
sa->cat = db_get_value_int(value);
}
else {
switch (ctype) {
case DB_C_TYPE_INT:
sa->dbl[ndbl] = db_get_value_int(value);
ndbl++;
break;
case DB_C_TYPE_DOUBLE:
sa->dbl[ndbl] = db_get_value_double(value);
ndbl++;
break;
case DB_C_TYPE_STRING:
sa->str[nstr] = G_store(db_get_value_string(value));
nstr++;
break;
case DB_C_TYPE_DATETIME:
sa->str[nstr] = ""; /* TODO */
nstr++;
break;
}
}
}
row++;
}
db_close_database_shutdown_driver(driver);
/* sort attributes */
qsort((void *)Map->site_att, Map->n_site_att, sizeof(SITE_ATT),
site_att_cmp);
return Map;
}
/*
Returns field names, types and indexes in double and string Map_info arrays
WARNING: user is responsible to free allocated memory, directly or calling G_sites_free_fields()
*/
int G_sites_get_fields(struct Map_info *Map, char ***cnames, int **ctypes,
int **ndx)
{
struct field_info *fi;
int nrows, row, ncols, col, ndbl, nstr, ctype;
const char *name;
dbDriver *driver;
dbString stmt;
dbCursor cursor;
dbTable *table;
dbColumn *column;
/*dbValue *value; */
/* warning: we are using "1" as cat field in Vect_get_field because G_sites_open_old
(in lib/sites/sites.c), that we use here to open sites, does the same and then
queries the db in the same way we do here.
Should it be not true in the future, maybe we'll have to change this by choosing
appropriate fields and multiple categories */
fi = (struct field_info *)Vect_get_field(Map, 1);
if (fi == NULL) { /* not attribute table */
G_debug(1, "No attribute table");
return -1;
}
driver = db_start_driver_open_database(fi->driver, fi->database);
if (driver == NULL)
G_fatal_error(_("Cannot open database %s by driver %s"), fi->database,
fi->driver);
db_init_string(&stmt);
db_set_string(&stmt, "select * from ");
db_append_string(&stmt, fi->table);
if (db_open_select_cursor(driver, &stmt, &cursor, DB_SEQUENTIAL) != DB_OK)
G_fatal_error(_("Cannot select attributes"));
nrows = db_get_num_rows(&cursor);
G_debug(1, "%d rows selected from vector attribute table", nrows);
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
if (ncols <= 0)
return ncols;
row = 0;
/* Get number of each type */
ndbl = nstr = 0;
*cnames = (char **)malloc(ncols * sizeof(char *));
*ctypes = (int *)malloc(ncols * sizeof(int));
*ndx = (int *)malloc(ncols * sizeof(int));
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
ctype = db_sqltype_to_Ctype(db_get_column_sqltype(column));
name = db_get_column_name(column);
*(*cnames + col) = (char *)malloc(strlen(name) + 1);
strcpy(*(*cnames + col), db_get_column_name(column));
/* ctypes is 'c' for cat, 'd' for double, 's' for string */
if (strcmp(name, fi->key) == 0) {
*(*ctypes + col) = 'c';
*(*ndx + col) = -1;
}
else {
switch (ctype) {
case DB_C_TYPE_INT:
case DB_C_TYPE_DOUBLE:
*(*ctypes + col) = 'd';
*(*ndx + col) = ndbl;
ndbl++;
break;
case DB_C_TYPE_STRING:
case DB_C_TYPE_DATETIME:
*(*ctypes + col) = 's';
*(*ndx + col) = nstr;
nstr++;
break;
}
}
}
db_close_database_shutdown_driver(driver);
return ncols;
}
/*!
\brief Write data to GRASS ASCII vector format
Prints message if some features without category are skipped.
\param[out] ascii pointer to the output ASCII file
\param[out] att att file (< version 5 only)
\param Map pointer to Map_info structure
\param ver version number 4 or 5
\param format format GV_ASCII_FORMAT_POINT or GV_ASCII_FORMAT_STD
\param dp number of significant digits
\param fs field separator
\param region_flag check region
\param type feature type filter
\param field field number
\param Clist list of categories to filter features or NULL
\param where SQL select where statement to filter features or NULL
\param column_names array of columns to be included to the output or NULL
"*" as the first item in the array indicates all columns
\param header TRUE to print also header
\return number of written features
\return -1 on error
*/
int Vect_write_ascii(FILE *ascii,
FILE *att, struct Map_info *Map, int ver,
int format, int dp, char *fs, int region_flag, int type,
int field, const struct cat_list *Clist, const char* where,
const char **column_names, int header)
{
int ltype, ctype, i, cat, line, left, right, found;
double *xptr, *yptr, *zptr, x, y;
static struct line_pnts *Points;
struct line_cats *Cats, *ACats;
char *xstring, *ystring, *zstring;
size_t xsize, ysize, zsize;
struct Cell_head window;
struct ilist *fcats;
int count, n_skipped;
/* where || columns */
struct field_info *Fi;
dbDriver *driver;
dbValue value;
dbHandle handle;
int *cats, ncats, more;
dbTable *Table;
dbString dbstring;
dbColumn *Column;
dbValue *Value;
char *buf;
size_t bufsize;
dbCursor cursor;
/* columns */
char **columns;
int *coltypes;
char *all_columns;
Fi = NULL;
driver = NULL;
columns = NULL;
coltypes = NULL;
all_columns = NULL;
G_zero(&value, sizeof(dbValue));
db_init_string(&dbstring);
xstring = NULL;
ystring = NULL;
zstring = NULL;
xsize = 0;
ysize = 0;
zsize = 0;
buf = NULL;
bufsize = 0;
/* get the region */
G_get_window(&window);
count = ncats = 0;
xstring = ystring = zstring = NULL;
cats = NULL;
if (field > 0 && (where || column_names)) {
Fi = Vect_get_field(Map, field);
if (!Fi) {
G_fatal_error(_("Database connection not defined for layer %d"),
field);
}
driver = db_start_driver(Fi->driver);
if (!driver)
G_fatal_error(_("Unable to start driver <%s>"), Fi->driver);
db_init_handle(&handle);
db_set_handle(&handle, Fi->database, NULL);
if (db_open_database(driver, &handle) != DB_OK)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
/* select cats (sorted array) */
ncats = db_select_int(driver, Fi->table, Fi->key, where, &cats);
G_debug(3, "%d categories selected from table <%s>", ncats, Fi->table);
if (!column_names) {
db_close_database(driver);
db_shutdown_driver(driver);
}
else {
int icol, ncols;
const char *col_name;
int len_all = 0;
db_set_string(&dbstring, Fi->table);
if (db_describe_table(driver, &dbstring, &Table) != DB_OK) {
G_warning(_("Unable to describe table <%s>"), Fi->table);
return -1;
}
ncols = db_get_table_number_of_columns(Table);
columns = (char **) G_malloc((ncols + 1) * sizeof(char *));
if (column_names[0] && strcmp(column_names[0], "*") == 0) {
/* all columns */
icol = 0;
for (i = 0; i < ncols; i++) {
col_name = db_get_column_name(db_get_table_column(Table, i));
/* key column skipped */
if (strcmp(Fi->key, col_name) != 0)
columns[icol++] = G_store(col_name);
}
columns[icol] = NULL;
}
else {
int j;
icol = 0;
i = 0;
while (column_names[i]) {
/* key column skipped */
if (strcmp(Fi->key, column_names[i]) != 0) {
found = 0;
for (j = 0; j < ncols; j++) {
col_name = db_get_column_name(db_get_table_column(Table, j));
if (strcmp(col_name, column_names[i]) == 0) {
columns[icol++] = G_store(col_name);
found = 1;
break;
}
}
if (!found) {
G_warning(_("Column <%s> does not exist"),
column_names[i]);
G_important_message(_("Available columns:"));
for (j = 0; j < ncols; j++) {
col_name = db_get_column_name(db_get_table_column(Table, j));
G_important_message("%s", col_name);
}
G_warning(_("Export cancelled"));
db_close_database(driver);
db_shutdown_driver(driver);
return -1;
}
}
i++;
}
columns[icol] = NULL;
}
db_zero_string(&dbstring);
db_free_table(Table);
Table = NULL;
if (columns[0]) {
/* selected columns only */
i = 0;
while (columns[i])
len_all += strlen(columns[i++]);
coltypes = G_malloc(i * sizeof(int));
all_columns = G_malloc(len_all + i + 2);
i = 0;
strcpy(all_columns, columns[0]);
while (columns[i]) {
/* get column types */
coltypes[i] = db_column_Ctype(driver, Fi->table, columns[i]);
if (coltypes[i] < 0) {
db_close_database(driver);
db_shutdown_driver(driver);
G_warning(_("Unknown type of column <%s>, export cancelled"),
columns[i]);
return -1;
}
if (i > 0) {
strcat(all_columns, ",");
strcat(all_columns, columns[i]);
}
i++;
}
}
else {
/* no column or only key column selected */
G_free(columns);
columns = NULL;
db_close_database(driver);
db_shutdown_driver(driver);
}
}
}
if (format == GV_ASCII_FORMAT_POINT && header) {
/* print header */
if (Map->head.with_z)
fprintf(ascii, "east%snorth%sheight%scat", fs, fs, fs);
else
fprintf(ascii, "east%snorth%scat", fs, fs);
if (columns) {
for (i = 0; columns[i]; i++) {
if (db_select_value
(driver, Fi->table, Fi->key, cat,
columns[i], &value) < 0)
G_fatal_error(_("Unable to select record from table <%s> (key %s, column %s)"),
Fi->table, Fi->key, columns[i]);
if (columns[i])
fprintf(ascii, "%s%s", fs, columns[i]);
else
fprintf(ascii, "%s", columns[i]); /* can not happen */
}
}
fprintf(ascii, "%s", HOST_NEWLINE);
}
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
ACats = Vect_new_cats_struct();
fcats = Vect_new_list();
/* by default, read_next_line will NOT read Dead lines */
/* but we can override that (in Level I only) by specifying */
/* the type -1, which means match all line types */
Vect_rewind(Map);
count = n_skipped = line = 0;
while (TRUE) {
ltype = Vect_read_next_line(Map, Points, Cats);
if (ltype == -1 ) { /* failure */
if (columns) {
db_close_database(driver);
db_shutdown_driver(driver);
free_col_arrays(coltypes, all_columns,
column_names && strcmp(column_names[0], "*") == 0 ? columns : NULL);
}
return -1;
}
if (ltype == -2) { /* EOF */
if (columns) {
db_close_database(driver);
db_shutdown_driver(driver);
free_col_arrays(coltypes, all_columns,
column_names && strcmp(column_names[0], "*") == 0 ? columns : NULL);
}
break;
}
line++;
if (!(ltype & type))
continue;
if (format == GV_ASCII_FORMAT_POINT && !(ltype & GV_POINTS))
continue;
found = get_cat(Cats, Clist, cats, ncats, field, &cat);
if (!found && field > 0 && ltype == GV_BOUNDARY &&
type & GV_AREA && Vect_level(Map) > 1) {
Vect_get_line_areas(Map, line, &left, &right);
if (left < 0)
left = Vect_get_isle_area(Map, abs(left));
if (left > 0) {
Vect_get_area_cats(Map, left, ACats);
found = get_cat(ACats, Clist, cats, ncats, field, &cat);
}
if (right < 0)
right = Vect_get_isle_area(Map, abs(right));
if (!found && right > 0) {
Vect_get_area_cats(Map, right, ACats);
found = get_cat(ACats, Clist, cats, ncats, field, &cat);
}
}
if (!found) {
if (Cats->n_cats < 1)
n_skipped++;
continue;
}
if (ver < 5) {
Vect_cat_get(Cats, 1, &cat);
}
switch (ltype) {
case GV_BOUNDARY:
if (ver == 5)
ctype = 'B';
else
ctype = 'A';
break;
case GV_CENTROID:
if (ver < 5) {
if (att != NULL) {
if (cat > 0) {
G_rasprintf(&xstring, &xsize, "%.*f", dp, Points->x[0]);
G_trim_decimal(xstring);
G_rasprintf(&ystring, &ysize, "%.*f", dp, Points->y[0]);
G_trim_decimal(ystring);
fprintf(att, "A %s %s %d%s", xstring, ystring, cat, HOST_NEWLINE);
}
}
continue;
}
ctype = 'C';
break;
case GV_LINE:
ctype = 'L';
break;
case GV_POINT:
ctype = 'P';
break;
case GV_FACE:
ctype = 'F';
break;
case GV_KERNEL:
ctype = 'K';
break;
default:
ctype = 'X';
G_warning(_("Unknown feature type %d"), (int)ltype);
break;
}
if (format == GV_ASCII_FORMAT_POINT) {
if (region_flag) {
if ((window.east < Points->x[0]) ||
(window.west > Points->x[0]))
continue;
}
G_rasprintf(&xstring, &xsize, "%.*f", dp, Points->x[0]);
G_trim_decimal(xstring);
if (region_flag) {
if ((window.north < Points->y[0]) ||
(window.south > Points->y[0]))
continue;
}
G_rasprintf(&ystring, &ysize, "%.*f", dp, Points->y[0]);
G_trim_decimal(ystring);
Vect_field_cat_get(Cats, field, fcats);
if (Map->head.with_z && ver == 5) {
if (region_flag) {
if ((window.top < Points->z[0]) ||
(window.bottom > Points->z[0]))
continue;
}
G_rasprintf(&zstring, &zsize, "%.*f", dp, Points->z[0]);
G_trim_decimal(zstring);
fprintf(ascii, "%s%s%s%s%s", xstring, fs, ystring, fs,
zstring);
}
else {
fprintf(ascii, "%s%s%s", xstring, fs, ystring);
}
if (fcats->n_values > 0 && cat > -1) {
if (fcats->n_values > 1) {
G_warning(_("Feature has more categories. Only one category (%d) "
"is exported."), cat);
}
fprintf(ascii, "%s%d", fs, cat);
/* print attributes */
if (columns) {
G_rasprintf(&buf, &bufsize, "SELECT %s FROM %s WHERE %s = %d",
all_columns, Fi->table, Fi->key, cat);
G_debug(2, "SQL: %s", buf);
db_set_string(&dbstring, buf);
if (db_open_select_cursor
(driver, &dbstring, &cursor, DB_SEQUENTIAL) != DB_OK) {
db_close_database(driver);
db_shutdown_driver(driver);
G_fatal_error(_("Cannot select attributes for cat = %d"),
cat);
}
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK) {
db_close_database(driver);
db_shutdown_driver(driver);
G_fatal_error(_("Unable to fetch data from table"));
}
Table = db_get_cursor_table(&cursor);
for (i = 0; columns[i]; i++) {
Column = db_get_table_column(Table, i);
Value = db_get_column_value(Column);
if (db_test_value_isnull(Value)) {
fprintf(ascii, "%s", fs);
}
else {
switch(coltypes[i])
{
case DB_C_TYPE_INT: {
fprintf(ascii, "%s%d", fs, db_get_value_int(Value));
break;
}
case DB_C_TYPE_DOUBLE: {
fprintf(ascii, "%s%.*f", fs, dp, db_get_value_double(Value));
break;
}
case DB_C_TYPE_STRING: {
fprintf(ascii, "%s%s", fs, db_get_value_string(Value));
break;
}
case DB_C_TYPE_DATETIME: {
break;
}
case -1:
G_fatal_error(_("Column <%s> not found in table <%s>"),
columns[i], Fi->table);
default: G_fatal_error(_("Column <%s>: unsupported data type"),
columns[i]);
}
}
}
db_close_cursor(&cursor);
}
}
fprintf(ascii, "%s", HOST_NEWLINE);
}
else if (format == GV_ASCII_FORMAT_STD) {
/* FORMAT_STANDARD */
if (ver == 5 && Cats->n_cats > 0)
fprintf(ascii, "%c %d %d%s", ctype, Points->n_points,
Cats->n_cats, HOST_NEWLINE);
else
fprintf(ascii, "%c %d%s", ctype, Points->n_points, HOST_NEWLINE);
xptr = Points->x;
yptr = Points->y;
zptr = Points->z;
while (Points->n_points--) {
G_rasprintf(&xstring, &xsize, "%.*f", dp, *xptr++);
G_trim_decimal(xstring);
G_rasprintf(&ystring, &ysize, "%.*f", dp, *yptr++);
G_trim_decimal(ystring);
if (ver == 5) {
if (Map->head.with_z) {
G_rasprintf(&zstring, &zsize, "%.*f", dp, *zptr++);
G_trim_decimal(zstring);
fprintf(ascii, " %-12s %-12s %-12s%s", xstring,
ystring, zstring, HOST_NEWLINE);
}
else {
fprintf(ascii, " %-12s %-12s%s", xstring, ystring, HOST_NEWLINE);
}
} /*Version 4 */
else {
fprintf(ascii, " %-12s %-12s%s", ystring, xstring, HOST_NEWLINE);
}
}
if (ver == 5) {
for (i = 0; i < Cats->n_cats; i++) {
fprintf(ascii, " %-5d %-10d%s", Cats->field[i],
Cats->cat[i], HOST_NEWLINE);
}
}
else {
if (cat > -1) {
if (ltype == GV_POINT) {
G_rasprintf(&xstring, &xsize, "%.*f", dp, Points->x[0]);
G_trim_decimal(xstring);
G_rasprintf(&ystring, &ysize, "%.*f", dp, Points->y[0]);
G_trim_decimal(ystring);
fprintf(att, "P %s %s %d%s", xstring, ystring, cat, HOST_NEWLINE);
}
else {
x = (Points->x[1] + Points->x[0]) / 2;
y = (Points->y[1] + Points->y[0]) / 2;
G_rasprintf(&xstring, &xsize, "%.*f", dp, x);
G_trim_decimal(xstring);
G_rasprintf(&ystring, &ysize, "%.*f", dp, y);
G_trim_decimal(ystring);
fprintf(att, "L %s %s %d%s", xstring, ystring, cat, HOST_NEWLINE);
}
}
}
}
else if (format == GV_ASCII_FORMAT_WKT) {
if (ltype & (GV_BOUNDARY | GV_CENTROID | GV_FACE | GV_KERNEL))
continue;
/* Well-Known Text */
Vect_sfa_line_astext(Points, ltype, Vect_is_3d(Map), dp, ascii);
count++;
}
else {
G_fatal_error(_("Unknown format"));
}
count++;
}
if (format == GV_ASCII_FORMAT_WKT) {
/* process areas - topology required */
int i, area, nareas, isle, nisles;
if (Vect_level(Map) < 2) {
G_warning(_("Topology not available, unable to process areas"));
nareas = 0;
}
else {
nareas = Vect_get_num_areas(Map);
}
for (area = 1; area <= nareas; area++) {
if (!Vect_area_alive(Map, area)) /* skip dead areas */
continue;
if (Vect_get_area_cat(Map, area, field) < 0)
continue;
/* get boundary -> linearring */
if (Vect_get_area_points(Map, area, Points) < 0) {
G_warning(_("Unable to get boundary of area id %d"), area);
continue;
}
fprintf(ascii, "POLYGON(");
/* write outter ring */
Vect_sfa_line_astext(Points, GV_BOUNDARY, 0, dp, ascii); /* boundary is always 2D */
/* get isles (holes) -> inner rings */
nisles = Vect_get_area_num_isles(Map, area);
for (i = 0; i < nisles; i++) {
/* get isle boundary -> linearring */
isle = Vect_get_area_isle(Map, area, i);
if (Vect_get_isle_points(Map, isle, Points) < 0) {
G_warning(_("Unable to get boundary of isle id %d (area id %d)"), isle, area);
continue;
}
fprintf(ascii, ", ");
/* write inner ring */
Vect_sfa_line_astext(Points, GV_BOUNDARY, 0, dp, ascii); /* boundary is always 2D */
}
fprintf(ascii, ")%s", HOST_NEWLINE);
count++;
}
}
if (n_skipped > 0)
G_important_message(_("%d features without category skipped. To export also "
"features without category use '%s=-1'."), n_skipped, "layer");
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(Cats);
Vect_destroy_cats_struct(ACats);
return count;
}
QgsFields QgsGrassVectorLayer::fields()
{
QString dblnPath = mGrassObject.mapsetPath() + "/vector/" + mGrassObject.name() + "/dbln";
QgsDebugMsg( "dblnPath = " + dblnPath );
QFileInfo dblnFileInfo( dblnPath );
if ( !dblnFileInfo.exists() )
{
QgsDebugMsg( "dbln does not exist" );
mFields.clear();
mFieldsTimeStamp.setTime_t( 0 );
return mFields;
}
if ( dblnFileInfo.lastModified() > mFieldsTimeStamp && !mDriver.isEmpty()
&& !mDatabase.isEmpty() && !mTable.isEmpty() && !mKey.isEmpty() )
{
QgsDebugMsg( "reload fields" );
mError.clear();
mFields.clear();
mFieldsTimeStamp = dblnFileInfo.lastModified();
QgsDebugMsg( "open database " + mDatabase + " by driver " + mDriver );
QgsGrass::lock();
QgsGrass::setMapset( mGrassObject.gisdbase(), mGrassObject.location(), mGrassObject.mapset() );
dbDriver *driver = db_start_driver_open_database( mDriver.toUtf8().data(), mDatabase.toUtf8().data() );
if ( !driver )
{
mError = QObject::tr( "Cannot open database %1 by driver %2" ).arg( mDatabase, mDatabase );
QgsDebugMsg( mError );
}
else
{
QgsDebugMsg( "Database opened -> describe table " + mTable );
dbString tableName;
db_init_string( &tableName );
db_set_string( &tableName, mTable.toUtf8().data() );
dbTable *table;
if ( db_describe_table( driver, &tableName, &table ) != DB_OK )
{
mError = QObject::tr( "Cannot describe table %1" ).arg( mTable );
QgsDebugMsg( mError );
}
else
{
int nCols = db_get_table_number_of_columns( table );
for ( int c = 0; c < nCols; c++ )
{
dbColumn *column = db_get_table_column( table, c );
int ctype = db_sqltype_to_Ctype( db_get_column_sqltype( column ) );
QString type;
QVariant::Type qtype = QVariant::String; //default to string to prevent compiler warnings
switch ( ctype )
{
case DB_C_TYPE_INT:
type = "int";
qtype = QVariant::Int;
break;
case DB_C_TYPE_DOUBLE:
type = "double";
qtype = QVariant::Double;
break;
case DB_C_TYPE_STRING:
type = "string";
qtype = QVariant::String;
break;
case DB_C_TYPE_DATETIME:
type = "datetime";
qtype = QVariant::String;
break;
}
mFields.append( QgsField( db_get_column_name( column ), qtype, type, db_get_column_length( column ), 0 ) );
}
}
db_close_database_shutdown_driver( driver );
}
QgsGrass::unlock();
}
QgsDebugMsg( QString( "mFields.size() = %1" ).arg( mFields.size() ) );
return mFields;
}
int db__driver_create_table(dbTable * table)
{
int col, ncols;
dbColumn *column;
const char *colname;
int sqltype;
char buf[500];
PGresult *res;
dbString sql;
dbConnection connection;
G_debug(3, "db__driver_create_table()");
init_error();
db_init_string(&sql);
/* db_table_to_sql ( table, &sql ); */
db_set_string(&sql, "create table ");
db_append_string(&sql, db_get_table_name(table));
db_append_string(&sql, " ( ");
ncols = db_get_table_number_of_columns(table);
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
colname = db_get_column_name(column);
sqltype = db_get_column_sqltype(column);
G_debug(3, "%s (%s)", colname, db_sqltype_name(sqltype));
if (col > 0)
db_append_string(&sql, ", ");
db_append_string(&sql, colname);
db_append_string(&sql, " ");
switch (sqltype) {
case DB_SQL_TYPE_CHARACTER:
sprintf(buf, "varchar(%d)", db_get_column_length(column));
db_append_string(&sql, buf);
break;
case DB_SQL_TYPE_TEXT:
db_append_string(&sql, "text");
break;
case DB_SQL_TYPE_SMALLINT:
db_append_string(&sql, "smallint");
break;
case DB_SQL_TYPE_INTEGER:
db_append_string(&sql, "integer");
break;
case DB_SQL_TYPE_REAL:
db_append_string(&sql, "real");
break;
/* TODO: better numeric types */
case DB_SQL_TYPE_DOUBLE_PRECISION:
case DB_SQL_TYPE_DECIMAL:
case DB_SQL_TYPE_NUMERIC:
case DB_SQL_TYPE_INTERVAL:
db_append_string(&sql, "double precision");
break;
case DB_SQL_TYPE_DATE:
db_append_string(&sql, "date");
break;
case DB_SQL_TYPE_TIME:
db_append_string(&sql, "time");
break;
case DB_SQL_TYPE_TIMESTAMP:
db_append_string(&sql, "timestamp");
break;
default:
G_warning("Unknown column type (%s)", colname);
return DB_FAILED;
}
}
db_append_string(&sql, " )");
G_debug(3, " SQL: %s", db_get_string(&sql));
res = PQexec(pg_conn, db_get_string(&sql));
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
append_error("Cannot create table:\n");
append_error(db_get_string(&sql));
append_error("\n");
append_error(PQerrorMessage(pg_conn));
report_error();
PQclear(res);
db_free_string(&sql);
return DB_FAILED;
}
PQclear(res);
/* Grant privileges */
db_get_connection(&connection);
db_set_string(&sql, "grant select on ");
db_append_string(&sql, db_get_table_name(table));
db_append_string(&sql, " to public");
if (connection.group) {
db_append_string(&sql, ", group ");
db_append_string(&sql, connection.group);
}
G_debug(3, " SQL: %s", db_get_string(&sql));
res = PQexec(pg_conn, db_get_string(&sql));
if (!res || PQresultStatus(res) != PGRES_COMMAND_OK) {
append_error("Cannot grant select on table:\n");
append_error(db_get_string(&sql));
append_error("\n");
append_error(PQerrorMessage(pg_conn));
report_error();
PQclear(res);
db_free_string(&sql);
return DB_FAILED;
}
PQclear(res);
db_free_string(&sql);
return DB_OK;
}
void QgsGrassVectorMapLayer::load()
{
clear();
if ( !mMap )
{
return;
}
// Attributes are not loaded for topo layers in which case field == 0
if ( mField == 0 )
{
return;
}
QgsDebugMsg( QString( "cidxFieldIndex() = %1 cidxFieldNumCats() = %2" ).arg( cidxFieldIndex() ).arg( cidxFieldNumCats() ) );
mFieldInfo = Vect_get_field( mMap->map(), mField ); // should work also with field = 0
if ( !mFieldInfo )
{
QgsDebugMsg( "No field info -> no attribute table" );
}
else
{
QgsDebugMsg( "Field info found -> open database" );
QFileInfo di( mMap->grassObject().mapsetPath() + "/vector/" + mMap->grassObject().name() + "/dbln" );
mLastLoaded = di.lastModified();
QString error;
dbDriver *databaseDriver = openDriver( error );
if ( !databaseDriver || !error.isEmpty() )
{
QgsDebugMsg( error );
}
else
{
QgsDebugMsg( "Database opened -> open select cursor" );
QgsGrass::lock(); // not sure if lock is necessary
dbString dbstr;
db_init_string( &dbstr );
db_set_string( &dbstr, ( char * )"select * from " );
db_append_string( &dbstr, mFieldInfo->table );
QgsDebugMsg( QString( "SQL: %1" ).arg( db_get_string( &dbstr ) ) );
dbCursor databaseCursor;
if ( db_open_select_cursor( databaseDriver, &dbstr, &databaseCursor, DB_SCROLL ) != DB_OK )
{
db_close_database_shutdown_driver( databaseDriver );
QgsGrass::warning( "Cannot select attributes from table '" + QString( mFieldInfo->table ) + "'" );
}
else
{
#ifdef QGISDEBUG
int nRecords = db_get_num_rows( &databaseCursor );
QgsDebugMsg( QString( "Number of records: %1" ).arg( nRecords ) );
#endif
dbTable *databaseTable = db_get_cursor_table( &databaseCursor );
int nColumns = db_get_table_number_of_columns( databaseTable );
// Read columns' description
for ( int i = 0; i < nColumns; i++ )
{
QPair<double, double> minMax( DBL_MAX, -DBL_MAX );
dbColumn *column = db_get_table_column( databaseTable, i );
int ctype = db_sqltype_to_Ctype( db_get_column_sqltype( column ) );
QVariant::Type qtype = QVariant::String; //default to string
QgsDebugMsg( QString( "column = %1 ctype = %2" ).arg( db_get_column_name( column ) ).arg( ctype ) );
QString ctypeStr;
switch ( ctype )
{
case DB_C_TYPE_INT:
ctypeStr = QStringLiteral( "integer" );
qtype = QVariant::Int;
break;
case DB_C_TYPE_DOUBLE:
ctypeStr = QStringLiteral( "double" );
qtype = QVariant::Double;
break;
case DB_C_TYPE_STRING:
ctypeStr = QStringLiteral( "string" );
qtype = QVariant::String;
break;
case DB_C_TYPE_DATETIME:
ctypeStr = QStringLiteral( "datetime" );
qtype = QVariant::String;
break;
}
mTableFields.append( QgsField( db_get_column_name( column ), qtype, ctypeStr,
db_get_column_length( column ), db_get_column_precision( column ) ) );
mMinMax << minMax;
if ( G_strcasecmp( db_get_column_name( column ), mFieldInfo->key ) == 0 )
{
mKeyColumn = i;
}
}
if ( mKeyColumn < 0 )
{
mTableFields.clear();
QgsGrass::warning( QObject::tr( "Key column '%1' not found in the table '%2'" ).arg( mFieldInfo->key, mFieldInfo->table ) );
}
else
{
mHasTable = true;
// Read attributes to the memory
for ( ;; )
{
int more;
if ( db_fetch( &databaseCursor, DB_NEXT, &more ) != DB_OK )
{
QgsDebugMsg( "Cannot fetch DB record" );
break;
}
if ( !more )
{
break; // no more records
}
// Check cat value
dbColumn *column = db_get_table_column( databaseTable, mKeyColumn );
dbValue *value = db_get_column_value( column );
if ( db_test_value_isnull( value ) )
{
continue;
}
int cat = db_get_value_int( value );
if ( cat < 0 )
{
continue;
}
QList<QVariant> values;
for ( int i = 0; i < nColumns; i++ )
{
column = db_get_table_column( databaseTable, i );
int sqltype = db_get_column_sqltype( column );
int ctype = db_sqltype_to_Ctype( sqltype );
value = db_get_column_value( column );
db_convert_value_to_string( value, sqltype, &dbstr );
QgsDebugMsgLevel( QString( "column = %1 value = %2" ).arg( db_get_column_name( column ), db_get_string( &dbstr ) ), 3 );
QVariant variant;
if ( !db_test_value_isnull( value ) )
{
int iv;
double dv;
//layer.mAttributes[layer.nAttributes].values[i] = strdup( db_get_string( &dbstr ) );
switch ( ctype )
{
case DB_C_TYPE_INT:
iv = db_get_value_int( value );
variant = QVariant( iv );
mMinMax[i].first = std::min( mMinMax[i].first, ( double )iv );
mMinMax[i].second = std::min( mMinMax[i].second, ( double )iv );
break;
case DB_C_TYPE_DOUBLE:
dv = db_get_value_double( value );
variant = QVariant( dv );
mMinMax[i].first = std::min( mMinMax[i].first, dv );
mMinMax[i].second = std::min( mMinMax[i].second, dv );
break;
case DB_C_TYPE_STRING:
// Store as byte array so that codec may be used later
variant = QVariant( QByteArray( db_get_value_string( value ) ) );
break;
case DB_C_TYPE_DATETIME:
variant = QVariant( QByteArray( db_get_string( &dbstr ) ) );
break;
default:
variant = QVariant( QByteArray( db_get_string( &dbstr ) ) );
}
}
QgsDebugMsgLevel( QString( "column = %1 variant = %2" ).arg( db_get_column_name( column ), variant.toString() ), 3 );
values << variant;
}
mAttributes.insert( cat, values );
}
}
mValid = true;
db_close_cursor( &databaseCursor );
db_close_database_shutdown_driver( databaseDriver );
db_free_string( &dbstr );
QgsDebugMsg( QString( "mTableFields.size = %1" ).arg( mTableFields.size() ) );
QgsDebugMsg( QString( "number of attributes = %1" ).arg( mAttributes.size() ) );
}
QgsGrass::unlock();
}
}
// Add cat if no attribute fields exist (otherwise qgis crashes)
if ( mTableFields.size() == 0 )
{
mKeyColumn = 0;
mTableFields.append( QgsField( QStringLiteral( "cat" ), QVariant::Int, QStringLiteral( "integer" ) ) );
QPair<double, double> minMax( 0, 0 );
if ( cidxFieldIndex() >= 0 )
{
int ncats, cat, type, id;
ncats = Vect_cidx_get_num_cats_by_index( mMap->map(), cidxFieldIndex() );
if ( ncats > 0 )
{
Vect_cidx_get_cat_by_index( mMap->map(), cidxFieldIndex(), 0, &cat, &type, &id );
minMax.first = cat;
Vect_cidx_get_cat_by_index( mMap->map(), cidxFieldIndex(), ncats - 1, &cat, &type, &id );
minMax.second = cat;
}
}
mMinMax << minMax;
}
mFields = mTableFields;
mAttributeFields = mTableFields;
QgsDebugMsg( QString( "layer loaded mTableFields.size() = %1 mAttributes.size() = %2" ).arg( mTableFields.size() ).arg( mAttributes.size() ) );
mValid = true;
}
int db__driver_create_table(dbTable * table)
{
int col, ncols;
dbColumn *column;
const char *colname;
int sqltype;
char buf[500];
dbString sql;
/* dbConnection conn_par; */
G_debug(3, "db__driver_create_table()");
init_error();
db_init_string(&sql);
db_set_string(&sql, "CREATE TABLE ");
db_append_string(&sql, db_get_table_name(table));
db_append_string(&sql, " ( ");
ncols = db_get_table_number_of_columns(table);
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
colname = db_get_column_name(column);
sqltype = db_get_column_sqltype(column);
G_debug(3, "%s (%s)", colname, db_sqltype_name(sqltype));
if (col > 0)
db_append_string(&sql, ", ");
db_append_string(&sql, colname);
db_append_string(&sql, " ");
switch (sqltype) {
case DB_SQL_TYPE_SMALLINT:
db_append_string(&sql, "SMALLINT");
break;
case DB_SQL_TYPE_INTEGER:
db_append_string(&sql, "INT");
break;
case DB_SQL_TYPE_REAL:
db_append_string(&sql, "FLOAT");
break;
/* TODO: better numeric types */
case DB_SQL_TYPE_DOUBLE_PRECISION:
case DB_SQL_TYPE_DECIMAL:
case DB_SQL_TYPE_NUMERIC:
case DB_SQL_TYPE_INTERVAL:
db_append_string(&sql, "DOUBLE");
break;
/* GRASS does not distinguish TIMESTAMP and DATETIME */
/*
case DB_SQL_TYPE_DATETIME|DB_DATETIME_MASK:
db_append_string ( &sql, "DATETIME");
break;
*/
case DB_SQL_TYPE_TIMESTAMP:
/* db_append_string ( &sql, "TIMESTAMP"); */
db_append_string(&sql, "DATETIME");
break;
case DB_SQL_TYPE_DATE:
db_append_string(&sql, "DATE");
break;
case DB_SQL_TYPE_TIME:
db_append_string(&sql, "TIME");
break;
case DB_SQL_TYPE_CHARACTER:
sprintf(buf, "VARCHAR(%d)", db_get_column_length(column));
db_append_string(&sql, buf);
break;
case DB_SQL_TYPE_TEXT:
db_append_string(&sql, "TEXT");
break;
default:
G_warning("Unknown column type (%s)", colname);
return DB_FAILED;
}
}
db_append_string(&sql, " )");
G_debug(3, " SQL: %s", db_get_string(&sql));
if (mysql_query(connection, db_get_string(&sql)) != 0) {
append_error("Cannot create table:\n");
append_error(db_get_string(&sql));
append_error("\n");
append_error(mysql_error(connection));
report_error();
db_free_string(&sql);
return DB_FAILED;
}
/* Grant privileges */
/*
* 1) MySQL does not support user groups but it is possible
* to specify list of users.
* 2) Only root can grant privileges.
*/
/*
db_get_connection(&conn_par);
if ( conn_par.group )
{
db_set_string ( &sql, "GRANT SELECT ON on " );
db_append_string ( &sql, db_get_table_name ( table ) );
db_append_string ( &sql, " TO " );
db_append_string ( &sql, conn_par.group );
G_debug (3, " SQL: %s", db_get_string(&sql) );
if ( mysql_query ( connection, db_get_string(&sql) ) != 0 )
{
G_warning ( "Cannot grant select on table: \n%s\n%s",
db_get_string(&sql), mysql_error(connection) );
}
}
*/
db_free_string(&sql);
return DB_OK;
}
