spatial_index.c

Go to the documentation of this file.

#include "spatial_index.h"


DxfSpatialIndex *
dxf_spatial_index_new ()
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        DxfSpatialIndex *spatial_index = NULL;
        size_t size;

        size = sizeof (DxfSpatialIndex);
        /* avoid malloc of 0 bytes */
        if (size == 0) size = 1;
        if ((spatial_index = malloc (size)) == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () could not allocate memory for a DxfSpatialIndex struct.\n")),
                  __FUNCTION__);
                spatial_index = NULL;
        }
        else
        {
                memset (spatial_index, 0, size);
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


DxfSpatialIndex *
dxf_spatial_index_init
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        int JD;
        float fraction_day;
        time_t now;

        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Warning in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                spatial_index = dxf_spatial_index_new ();
        }
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () could not allocate memory for a DxfSpatialIndex struct.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        spatial_index->id_code = 0;
        spatial_index->dictionary_owner_soft = strdup ("");
        spatial_index->dictionary_owner_hard = strdup ("");
        if (time (&now) != (time_t)(-1))
        {
                struct tm *current_time = localtime (&now);

                /* Transform the current local gregorian date in a julian date.*/
                JD = current_time->tm_mday - 32075 + 1461 * (current_time->tm_year + 6700 + (current_time->tm_mon - 13) / 12) / 4 + 367 * (current_time->tm_mon - 1 - (current_time->tm_mon - 13) / 12 * 12) / 12 - 3 * ((current_time->tm_year + 6800 + (current_time->tm_mon - 13) / 12) / 100) / 4;
                /* Transform the current local clock time in fraction of day.*/
                fraction_day = (current_time->tm_hour + (current_time->tm_min / 60.0) + (current_time->tm_sec / 3600.0)) / 24.0;
                spatial_index->time_stamp = (double) (JD + fraction_day);
        }
        else spatial_index->time_stamp = 0.0;
        spatial_index->next = NULL;
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


DxfSpatialIndex *
dxf_spatial_index_read
(
        DxfFile *fp,
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        char *temp_string = NULL;

        /* Do some basic checks. */
        if (fp == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL file pointer was passed.\n")),
                  __FUNCTION__);
                /* Clean up. */
                free (temp_string);
                return (NULL);
        }
        if (fp->acad_version_number < AutoCAD_14)
        {
                fprintf (stderr,
                  (_("Warning in %s () illegal DXF version for this entity.\n")),
                  __FUNCTION__);
        }
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Warning in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                spatial_index = dxf_spatial_index_new ();
                spatial_index = dxf_spatial_index_init (spatial_index);
        }
        (fp->line_number)++;
        fscanf (fp->fp, "%[^\n]", temp_string);
        while (strcmp (temp_string, "0") != 0)
        {
                if (ferror (fp->fp))
                {
                        fprintf (stderr,
                          (_("Error in %s () while reading from: %s in line: %d.\n")),
                          __FUNCTION__, fp->filename, fp->line_number);
                        /* Clean up. */
                        free (temp_string);
                        fclose (fp->fp);
                        return (NULL);
                }
                if (strcmp (temp_string, "5") == 0)
                {
                        /* Now follows a string containing a sequential
                         * id number. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%x\n", &spatial_index->id_code);
                }
                if (strcmp (temp_string, "40") == 0)
                {
                        /* Now follows a string containing a timestamp
                         * (Julian date). */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &spatial_index->time_stamp);
                }
                else if ((fp->acad_version_number >= AutoCAD_13)
                        && (strcmp (temp_string, "100") == 0))
                {
                        /* Now follows a string containing the
                         * subclass marker value. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%s\n", temp_string);
                        if ((strcmp (temp_string, "AcDbIndex") != 0)
                          && (strcmp (temp_string, "AcDbSpatialIndex") != 0))
                        {
                                fprintf (stderr,
                                  (_("Warning in %s () found a bad subclass marker in: %s in line: %d.\n")),
                                  __FUNCTION__, fp->filename, fp->line_number);
                        }
                }
                else if (strcmp (temp_string, "330") == 0)
                {
                        /* Now follows a string containing Soft-pointer
                         * ID/handle to owner dictionary. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%s\n", spatial_index->dictionary_owner_soft);
                }
                else if (strcmp (temp_string, "360") == 0)
                {
                        /* Now follows a string containing Hard owner
                         * ID/handle to owner dictionary. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%s\n", spatial_index->dictionary_owner_hard);
                }
                else if (strcmp (temp_string, "999") == 0)
                {
                        /* Now follows a string containing a comment. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%s\n", temp_string);
                        fprintf (stdout, (_("DXF comment: %s\n")), temp_string);
                }
                else
                {
                        fprintf (stderr,
                          (_("Warning in %s () unknown string tag found while reading from: %s in line: %d.\n")),
                          __FUNCTION__, fp->filename, fp->line_number);
                }
        }
        /* Clean up. */
        free (temp_string);
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


int
dxf_spatial_index_write
(
        DxfFile *fp,
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        char *dxf_entity_name = strdup ("SPATIAL_INDEX");

        /* Do some basic checks. */
        if (fp == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL file pointer was passed.\n")),
                  __FUNCTION__);
                /* Clean up. */
                free (dxf_entity_name);
                return (EXIT_FAILURE);
        }
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                /* Clean up. */
                free (dxf_entity_name);
                return (EXIT_FAILURE);
        }
        if (fp->acad_version_number < AutoCAD_14)
        {
                fprintf (stderr,
                  (_("Warning in %s () illegal DXF version for this %s entity with id-code: %x.\n")),
                  __FUNCTION__, dxf_entity_name, spatial_index->id_code);
        }
        /* Start writing output. */
        fprintf (fp->fp, "  0\n%s\n", dxf_entity_name);
        if (spatial_index->id_code != -1)
        {
                fprintf (fp->fp, "  5\n%x\n", spatial_index->id_code);
        }
        if ((strcmp (spatial_index->dictionary_owner_soft, "") != 0)
          && (fp->acad_version_number >= AutoCAD_14))
        {
                fprintf (fp->fp, "102\n{ACAD_REACTORS\n");
                fprintf (fp->fp, "330\n%s\n", spatial_index->dictionary_owner_soft);
                fprintf (fp->fp, "102\n}\n");
        }
        if ((strcmp (spatial_index->dictionary_owner_hard, "") != 0)
          && (fp->acad_version_number >= AutoCAD_14))
        {
                fprintf (fp->fp, "102\n{ACAD_XDICTIONARY\n");
                fprintf (fp->fp, "360\n%s\n", spatial_index->dictionary_owner_hard);
                fprintf (fp->fp, "102\n}\n");
        }
        if (fp->acad_version_number >= AutoCAD_13)
        {
                fprintf (fp->fp, "100\nAcDbIndex\n");
        }
        fprintf (fp->fp, " 40\n%f\n", spatial_index->time_stamp);
        if (fp->acad_version_number >= AutoCAD_13)
        {
                fprintf (fp->fp, "100\nAcDbSpatialIndex\n");
        }
        /* Clean up. */
        free (dxf_entity_name);
#if DEBUG
        DXF_DEBUG_END
#endif
        return (EXIT_SUCCESS);
}


int
dxf_spatial_index_free
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (EXIT_FAILURE);
        }
        if (spatial_index->next != NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () pointer to next was not NULL.\n")),
                  __FUNCTION__);
                return (EXIT_FAILURE);
        }
        free (spatial_index->dictionary_owner_soft);
        free (spatial_index->dictionary_owner_hard);
        free (spatial_index);
        spatial_index = NULL;
#if DEBUG
        DXF_DEBUG_END
#endif
        return (EXIT_SUCCESS);
}


void
dxf_spatial_index_free_chain
(
        DxfSpatialIndex *spatial_indices
)
{
#ifdef DEBUG
        DXF_DEBUG_BEGIN
#endif
        if (spatial_indices == NULL)
        {
                fprintf (stderr,
                  (_("Warning in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
        }
        while (spatial_indices != NULL)
        {
                struct DxfSpatialIndex *iter = spatial_indices->next;
                dxf_spatial_index_free (spatial_indices);
                spatial_indices = (DxfSpatialIndex *) iter;
        }
#if DEBUG
        DXF_DEBUG_END
#endif
}


int
dxf_spatial_index_get_id_code
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (EXIT_FAILURE);
        }
        if (spatial_index->id_code < 0)
        {
                fprintf (stderr,
                  (_("Warning in %s () a negative value was found.\n")),
                  __FUNCTION__);
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index->id_code);
}


DxfSpatialIndex *
dxf_spatial_index_set_id_code
(
        DxfSpatialIndex *spatial_index,
        int id_code
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (id_code < 0)
        {
                fprintf (stderr,
                  (_("Warning in %s () a negative value was passed.\n")),
                  __FUNCTION__);
        }
        spatial_index->id_code = id_code;
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


char *
dxf_spatial_index_get_dictionary_owner_soft
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (spatial_index->dictionary_owner_soft ==  NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was found.\n")),
                  __FUNCTION__);
                return (NULL);
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return (strdup (spatial_index->dictionary_owner_soft));
}


DxfSpatialIndex *
dxf_spatial_index_set_dictionary_owner_soft
(
        DxfSpatialIndex *spatial_index,
        char *dictionary_owner_soft
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (dictionary_owner_soft == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        spatial_index->dictionary_owner_soft = strdup (dictionary_owner_soft);
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


char *
dxf_spatial_index_get_dictionary_owner_hard
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (spatial_index->dictionary_owner_hard ==  NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was found.\n")),
                  __FUNCTION__);
                return (NULL);
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return (strdup (spatial_index->dictionary_owner_hard));
}


DxfSpatialIndex *
dxf_spatial_index_set_dictionary_owner_hard
(
        DxfSpatialIndex *spatial_index,
        char *dictionary_owner_hard
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (dictionary_owner_hard == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        spatial_index->dictionary_owner_hard = strdup (dictionary_owner_hard);
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


double
dxf_spatial_index_get_time_stamp
(
        DxfSpatialIndex *spatial_index
)
{
#ifdef DEBUG
        DXF_DEBUG_BEGIN
#endif

        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (EXIT_FAILURE);
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index->time_stamp);
}


DxfSpatialIndex *
dxf_spatial_index_set_time_stamp
(
        DxfSpatialIndex *spatial_index,
        double time_stamp
)
{
#ifdef DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        spatial_index->time_stamp = time_stamp;
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


DxfSpatialIndex *
dxf_spatial_index_get_next
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (spatial_index->next == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was found.\n")),
                  __FUNCTION__);
                return (NULL);
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return ((DxfSpatialIndex *) spatial_index->next);
}


DxfSpatialIndex *
dxf_spatial_index_set_next
(
        DxfSpatialIndex *spatial_index,
        DxfSpatialIndex *next
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (next == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        spatial_index->next = (struct DxfSpatialIndex *) next;
#if DEBUG
        DXF_DEBUG_END
#endif
        return (spatial_index);
}


DxfSpatialIndex *
dxf_spatial_index_get_last
(
        DxfSpatialIndex *spatial_index
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (spatial_index == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                return (NULL);
        }
        if (spatial_index->next == NULL)
        {
                fprintf (stderr,
                  (_("Warning in %s () a NULL pointer was found.\n")),
                  __FUNCTION__);
                return ((DxfSpatialIndex *) spatial_index);
        }
        DxfSpatialIndex *iter = (DxfSpatialIndex *) spatial_index->next;
        while (iter->next != NULL)
        {
                iter = (DxfSpatialIndex *) iter->next;
        }
#if DEBUG
        DXF_DEBUG_END
#endif
        return ((DxfSpatialIndex *) iter);
}


/* EOF*/