xline.c

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#include "xline.h"


DxfXLine *
dxf_xline_new ()
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        DxfXLine *xline = NULL;
        size_t size;

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


DxfXLine *
dxf_xline_init
(
        DxfXLine *xline
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        /* Do some basic checks. */
        if (xline == NULL)
        {
                fprintf (stderr,
                  (_("Warning in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                xline = dxf_xline_new ();
        }
        if (xline == NULL)
        {
              fprintf (stderr,
                (_("Error in %s () could not allocate memory for a DxfXLine struct.\n")),
                __FUNCTION__);
              return (NULL);
        }
        xline->id_code = 0;
        xline->linetype = strdup (DXF_DEFAULT_LINETYPE);
        xline->layer = strdup (DXF_DEFAULT_LAYER);
        xline->x0 = 0.0;
        xline->y0 = 0.0;
        xline->z0 = 0.0;
        xline->x1 = 0.0;
        xline->y1 = 0.0;
        xline->z1 = 0.0;
        xline->elevation = 0.0;
        xline->thickness = 0.0;
        xline->linetype_scale = DXF_DEFAULT_LINETYPE_SCALE;
        xline->visibility = DXF_DEFAULT_VISIBILITY;
        xline->color = DXF_COLOR_BYLAYER;
        xline->paperspace = DXF_MODELSPACE;
        xline->dictionary_owner_soft = strdup ("");
        xline->dictionary_owner_hard = strdup ("");
        xline->next = NULL;
#if DEBUG
        DXF_DEBUG_END
#endif
        return (xline);
}


DxfXLine *
dxf_xline_read
(
        DxfFile *fp,
        DxfXLine *xline
)
{
#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 (xline == NULL)
        {
                fprintf (stderr,
                  (_("Warning in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                xline = dxf_xline_new ();
                xline = dxf_xline_init (xline);
        }
        (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);
                        fclose (fp->fp);
                        /* Clean up. */
                        free (temp_string);
                        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", &xline->id_code);
                }
                else if (strcmp (temp_string, "6") == 0)
                {
                        /* Now follows a string containing a linetype
                         * name. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%s\n", xline->linetype);
                }
                else if (strcmp (temp_string, "8") == 0)
                {
                        /* Now follows a string containing a layer name. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%s\n", xline->layer);
                }
                else if (strcmp (temp_string, "10") == 0)
                {
                        /* Now follows a string containing the
                         * X-coordinate of the center point. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->x0);
                }
                else if (strcmp (temp_string, "20") == 0)
                {
                        /* Now follows a string containing the
                         * Y-coordinate of the center point. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->y0);
                }
                else if (strcmp (temp_string, "30") == 0)
                {
                        /* Now follows a string containing the
                         * Z-coordinate of the center point. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->z0);
                }
                else if (strcmp (temp_string, "11") == 0)
                {
                        /* Now follows a string containing the
                         * X-coordinate of the center point. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->x1);
                }
                else if (strcmp (temp_string, "21") == 0)
                {
                        /* Now follows a string containing the
                         * Y-coordinate of the center point. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->y1);
                }
                else if (strcmp (temp_string, "31") == 0)
                {
                        /* Now follows a string containing the
                         * Z-coordinate of the center point. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->z1);
                }
                else if ((fp->acad_version_number <= AutoCAD_11)
                        && (strcmp (temp_string, "38") == 0))
                {
                        /* Now follows a string containing the
                         * elevation. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->elevation);
                }
                else if (strcmp (temp_string, "39") == 0)
                {
                        /* Now follows a string containing the
                         * thickness. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->thickness);
                }
                else if (strcmp (temp_string, "48") == 0)
                {
                        /* Now follows a string containing the linetype
                         * scale. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%lf\n", &xline->linetype_scale);
                }
                else if (strcmp (temp_string, "60") == 0)
                {
                        /* Now follows a string containing the
                         * visibility value. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%hd\n", &xline->visibility);
                }
                else if (strcmp (temp_string, "62") == 0)
                {
                        /* Now follows a string containing the
                         * color value. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%d\n", &xline->color);
                }
                else if (strcmp (temp_string, "67") == 0)
                {
                        /* Now follows a string containing the
                         * paperspace value. */
                        (fp->line_number)++;
                        fscanf (fp->fp, "%d\n", &xline->paperspace);
                }
                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, "AcDbEntity") != 0)
                        && ((strcmp (temp_string, "AcDbXline") != 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", xline->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", xline->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);
                }
        }
        /* Handle omitted members and/or illegal values. */
        if (strcmp (xline->linetype, "") == 0)
        {
                xline->linetype = strdup (DXF_DEFAULT_LINETYPE);
        }
        if (strcmp (xline->layer, "") == 0)
        {
                xline->layer = strdup (DXF_DEFAULT_LAYER);
        }
        /* Clean up. */
        free (temp_string);
#if DEBUG
        DXF_DEBUG_END
#endif
        return (xline);
}


int
dxf_xline_write
(
        DxfFile *fp,
        DxfXLine *xline
)
{
#if DEBUG
        DXF_DEBUG_BEGIN
#endif
        char *dxf_entity_name = strdup ("XLINE");

        /* 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 (xline == NULL)
        {
                fprintf (stderr,
                  (_("Error in %s () a NULL pointer was passed.\n")),
                  __FUNCTION__);
                /* Clean up. */
                free (dxf_entity_name);
                return (EXIT_FAILURE);
        }
        if ((xline->x0 == xline->x1)
                && (xline->y0 == xline->y1)
                && (xline->z0 == xline->z1))
        {
                fprintf (stderr,
                  (_("Error in %s () start point and end point are identical for the %s entity with id-code: %x\n")),
                  __FUNCTION__, dxf_entity_name, xline->id_code);
                dxf_entity_skip (dxf_entity_name);
                /* Clean up. */
                free (dxf_entity_name);
                return (EXIT_FAILURE);
        }
        if (strcmp (xline->layer, "") == 0)
        {
                fprintf (stderr,
                  (_("Warning in %s () empty layer string for the %s entity with id-code: %x\n")),
                  __FUNCTION__, dxf_entity_name, xline->id_code);
                fprintf (stderr,
                  (_("    %s entity is relocated to layer 0\n")),
                  dxf_entity_name);
                xline->layer = strdup (DXF_DEFAULT_LAYER);
        }
        /* Start writing output. */
        fprintf (fp->fp, "  0\n%s\n", dxf_entity_name);
        if (xline->id_code != -1)
        {
                fprintf (fp->fp, "  5\n%x\n", xline->id_code);
        }
        if ((strcmp (xline->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", xline->dictionary_owner_soft);
                fprintf (fp->fp, "102\n}\n");
        }
        if ((strcmp (xline->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", xline->dictionary_owner_hard);
                fprintf (fp->fp, "102\n}\n");
        }
        if (fp->acad_version_number >= AutoCAD_13)
        {
                fprintf (fp->fp, "100\nAcDbEntity\n");
        }
        if (xline->paperspace == DXF_PAPERSPACE)
        {
                fprintf (fp->fp, " 67\n%d\n", DXF_PAPERSPACE);
        }
        fprintf (fp->fp, "  8\n%s\n", xline->layer);
        if (strcmp (xline->linetype, DXF_DEFAULT_LINETYPE) != 0)
        {
                fprintf (fp->fp, "  6\n%s\n", xline->linetype);
        }
        if ((fp->acad_version_number <= AutoCAD_11)
          && DXF_FLATLAND
          && (xline->elevation != 0.0))
        {
                fprintf (fp->fp, " 38\n%f\n", xline->elevation);
        }
        if (xline->color != DXF_COLOR_BYLAYER)
        {
                fprintf (fp->fp, " 62\n%d\n", xline->color);
        }
        if (xline->linetype_scale != 1.0)
        {
                fprintf (fp->fp, " 48\n%f\n", xline->linetype_scale);
        }
        if (xline->visibility != 0)
        {
                fprintf (fp->fp, " 60\n%d\n", xline->visibility);
        }
        if (fp->acad_version_number >= AutoCAD_13)
        {
                fprintf (fp->fp, "100\nAcDbXline\n");
        }
        if (xline->thickness != 0.0)
        {
                fprintf (fp->fp, " 39\n%f\n", xline->thickness);
        }
        fprintf (fp->fp, " 10\n%f\n", xline->x0);
        fprintf (fp->fp, " 20\n%f\n", xline->y0);
        fprintf (fp->fp, " 30\n%f\n", xline->z0);
        fprintf (fp->fp, " 11\n%f\n", xline->x1);
        fprintf (fp->fp, " 21\n%f\n", xline->y1);
        fprintf (fp->fp, " 31\n%f\n", xline->z1);
        /* Clean up. */
        free (dxf_entity_name);
#if DEBUG
        DXF_DEBUG_END
#endif
        return (EXIT_SUCCESS);
}


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


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


/* EOF */