Add xdata into geojson

[chen6857]

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In some scenarios, we will store some data in xdata. The current geojson file does not contain these data. This function can be added in future versions. When use dwgread.exe to save as dxf file, it can contain the XData content . but save to geojson file, will not contain.

#include <stdio.h>
#include <stdlib.h>

#include "dwg.h"
#include "bits.h"

/**
 * get xdata
 * @param obj Dwg_Object
 */
void object_eed(Dwg_Object *obj) {
    Dwg_Object_Object *obj_obj = obj->tio.object;
    for (unsigned i = 0; i < obj_obj->num_eed; i++) {
        Dwg_Eed eed = obj_obj->eed[i];
        if (eed.size) {
            Dwg_Object *appid = dwg_resolve_handle(obj_obj->dwg, eed.handle.value);
            if (appid && appid->fixedtype == DWG_TYPE_APPID) {
                char *name = appid->tio.object->tio.APPID->name;
                char *utf8 = bit_convert_TU((BITCODE_TU) name);
                printf("key: %s \n", utf8);
            }
        }

        if (eed.data) {
            const Dwg_Eed_Data *data = eed.data;
            char *str_utf8 = bit_convert_TU((BITCODE_TU) data->u.eed_0.string);
            printf("%d: %s \n", data->code, str_utf8);
            free(str_utf8);
        }
    }
}

/**
 * read xdata
 * @param filename
 */
void read_xdata(const char *filename) {
    Dwg_Data dwg;
    unsigned int opts = 1;

    dwg.opts = opts;
    dwg_read_file(filename, &dwg);

    for (unsigned i = 0; i < dwg.num_objects; i++) {
        Dwg_Object obj = dwg.object[i];
        Dwg_Object_Entity *entity = obj.tio.entity;

        if (obj.supertype != DWG_SUPERTYPE_ENTITY) {
            continue;
        }
        Dwg_Object *layer = entity->layer ? entity->layer->obj : NULL;
        if (!layer || layer->type != DWG_TYPE_LAYER) {
            continue;
        }
        object_eed(&obj);
    }
    dwg_free(&dwg);
}

xdata.dwg.zip

[rurban]

Only strings? Without checking the type (the group code). There need to be a saner logic and API what APPID's to include, and which data to export from it.

Could you add something like this to the wiki?

[chen6857]

Only strings? Without checking the type (the group code). There need to be a saner logic and API what APPID's to include, and which data to export from it.

Could you add something like this to the wiki?

The sample code is used for my one project, it is simple. I can write a complete code. But I usually don’t use C language, you need to check my code.

[rurban]

No code, just documentation what APPID's and types will be written to geojson.