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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <vector>
#include <string>
#include <map>
#include "jsonpull/jsonpull.h"
#include "geometry.hpp"
#include "projection.hpp"
#include "read_json.hpp"
#include "text.hpp"
#include "mvt.hpp"
#include "milo/dtoa_milo.h"
#include "errors.hpp"
#include "serial.hpp"
const char *geometry_names[GEOM_TYPES] = {
"Point",
"MultiPoint",
"LineString",
"MultiLineString",
"Polygon",
"MultiPolygon",
};
int geometry_within[GEOM_TYPES] = {
-1, /* point */
GEOM_POINT, /* multipoint */
GEOM_POINT, /* linestring */
GEOM_LINESTRING, /* multilinestring */
GEOM_LINESTRING, /* polygon */
GEOM_POLYGON, /* multipolygon */
};
int mb_geometry[GEOM_TYPES] = {
VT_POINT,
VT_POINT,
VT_LINE,
VT_LINE,
VT_POLYGON,
VT_POLYGON,
};
void json_context(json_object *j) {
char *s = json_stringify(j);
if (strlen(s) >= 500) {
snprintf(s + 497, strlen(s) + 1 - 497, "...");
}
fprintf(stderr, "in JSON object %s\n", s);
free(s); // stringify
}
void parse_geometry(int t, json_object *j, drawvec &out, int op, const char *fname, int line, json_object *feature) {
if (j == NULL || j->type != JSON_ARRAY) {
fprintf(stderr, "%s:%d: expected array for geometry type %d: ", fname, line, t);
json_context(feature);
return;
}
int within = geometry_within[t];
if (within >= 0) {
size_t i;
for (i = 0; i < j->value.array.length; i++) {
if (within == GEOM_POINT) {
if (i == 0 || mb_geometry[t] == VT_POINT) {
op = VT_MOVETO;
} else {
op = VT_LINETO;
}
}
parse_geometry(within, j->value.array.array[i], out, op, fname, line, feature);
}
} else {
if (j->value.array.length >= 2 && j->value.array.array[0]->type == JSON_NUMBER && j->value.array.array[1]->type == JSON_NUMBER) {
long long x, y;
double lon = j->value.array.array[0]->value.number.number;
double lat = j->value.array.array[1]->value.number.number;
projection->project(lon, lat, 32, &x, &y);
if (j->value.array.length > 2) {
static int warned = 0;
if (!warned) {
fprintf(stderr, "%s:%d: ignoring dimensions beyond two: ", fname, line);
json_context(j);
fprintf(stderr, "%s:%d: ignoring dimensions beyond two: ", fname, line);
json_context(feature);
warned = 1;
}
}
out.push_back(draw(op, x, y));
} else {
fprintf(stderr, "%s:%d: malformed point: ", fname, line);
json_context(j);
fprintf(stderr, "%s:%d: malformed point: ", fname, line);
json_context(feature);
exit(EXIT_JSON);
}
}
if (t == GEOM_POLYGON) {
// Note that this is not using the correct meaning of closepath.
//
// We are using it here to close an entire Polygon, to distinguish
// the Polygons within a MultiPolygon from each other.
//
// This will be undone in fix_polygon(), which needs to know which
// rings come from which Polygons so that it can make the winding order
// of the outer ring be the opposite of the order of the inner rings.
out.push_back(draw(VT_CLOSEPATH, 0, 0));
}
}
// This is used to convert a JSON attribute value into a serial_val-style
// type and stringified value. All numeric values, even if they are integers,
// even integers that are too large to fit in a double but will still be
// stringified with their original precision, are recorded here as mvt_double.
serial_val stringify_value(json_object *value, const char *reading, int line, json_object *feature) {
serial_val sv;
if (value != NULL) {
int vt = value->type;
if (vt == JSON_STRING) {
sv.type = mvt_string;
sv.s = value->value.string.string;
std::string err = check_utf8(sv.s);
if (err.size() > 0) {
fprintf(stderr, "%s:%d: %s: ", reading, line, err.c_str());
json_context(feature);
exit(EXIT_UTF8);
}
} else if (vt == JSON_NUMBER) {
sv.type = mvt_double;
if (value->value.number.large_unsigned != 0) {
sv.s = std::to_string(value->value.number.large_unsigned);
} else if (value->value.number.large_signed != 0) {
sv.s = std::to_string(value->value.number.large_signed);
} else {
sv.s = milo::dtoa_milo(value->value.number.number);
}
} else if (vt == JSON_TRUE) {
sv.type = mvt_bool;
sv.s = "true";
} else if (vt == JSON_FALSE) {
sv.type = mvt_bool;
sv.s = "false";
} else if (vt == JSON_NULL) {
sv.type = mvt_null;
sv.s = "null";
} else {
sv.type = mvt_string;
const char *v = json_stringify(value);
sv.s = std::string(v);
free((void *) v); // stringify
}
}
return sv;
}
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