PostGIS  2.2.8dev-r@@SVN_REVISION@@

◆ gbox_to_gml2()

static char* gbox_to_gml2 ( const GBOX bbox,
const char *  srs,
int  precision,
const char *  prefix 
)
static

Definition at line 62 of file lwout_gml.c.

References GBOX::flags, FLAGS_GET_Z, LW_TRUE, lwalloc(), pointArray_GMLsize(), pointArray_toGML2(), ptarray_append_point(), ptarray_construct_empty(), ptarray_free(), POINT4D::x, GBOX::xmax, GBOX::xmin, POINT4D::y, GBOX::ymax, GBOX::ymin, POINT4D::z, GBOX::zmax, and GBOX::zmin.

Referenced by lwgeom_extent_to_gml2().

63 {
64  int size;
65  POINT4D pt;
66  POINTARRAY *pa;
67  char *ptr, *output;
68  size_t prefixlen = strlen(prefix);
69 
70  if ( ! bbox )
71  {
72  size = ( sizeof("<Box>/") + (prefixlen*2) ) * 2;
73  if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
74 
75  ptr = output = lwalloc(size);
76 
77  ptr += sprintf(ptr, "<%sBox", prefix);
78 
79  if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
80 
81  ptr += sprintf(ptr, "/>");
82 
83  return output;
84  }
85 
86  pa = ptarray_construct_empty(FLAGS_GET_Z(bbox->flags), 0, 2);
87 
88  pt.x = bbox->xmin;
89  pt.y = bbox->ymin;
90  if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmin;
91  ptarray_append_point(pa, &pt, LW_TRUE);
92 
93  pt.x = bbox->xmax;
94  pt.y = bbox->ymax;
95  if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmax;
96  ptarray_append_point(pa, &pt, LW_TRUE);
97 
98  size = pointArray_GMLsize(pa, precision);
99  size += ( sizeof("<Box><coordinates>/") + (prefixlen*2) ) * 2;
100  if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
101 
102  ptr = output = lwalloc(size);
103 
104  if ( srs ) ptr += sprintf(ptr, "<%sBox srsName=\"%s\">", prefix, srs);
105  else ptr += sprintf(ptr, "<%sBox>", prefix);
106 
107  ptr += sprintf(ptr, "<%scoordinates>", prefix);
108  ptr += pointArray_toGML2(pa, ptr, precision);
109  ptr += sprintf(ptr, "</%scoordinates></%sBox>", prefix, prefix);
110 
111  ptarray_free(pa);
112 
113  return output;
114 }
double x
Definition: liblwgeom.h:336
double xmax
Definition: liblwgeom.h:277
POINTARRAY * ptarray_construct_empty(char hasz, char hasm, uint32_t maxpoints)
Create a new POINTARRAY with no points.
Definition: ptarray.c:70
void ptarray_free(POINTARRAY *pa)
Definition: ptarray.c:330
double zmax
Definition: liblwgeom.h:281
double ymin
Definition: liblwgeom.h:278
double xmin
Definition: liblwgeom.h:276
int ptarray_append_point(POINTARRAY *pa, const POINT4D *pt, int allow_duplicates)
Append a point to the end of an existing POINTARRAY If allow_duplicate is LW_TRUE, then a duplicate point will not be added.
Definition: ptarray.c:156
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:61
uint8_t precision
Definition: cu_in_twkb.c:25
double ymax
Definition: liblwgeom.h:279
#define FLAGS_GET_Z(flags)
Macros for manipulating the &#39;flags&#39; byte.
Definition: liblwgeom.h:124
double z
Definition: liblwgeom.h:336
uint8_t flags
Definition: liblwgeom.h:275
static size_t pointArray_GMLsize(POINTARRAY *pa, int precision)
Definition: lwout_gml.c:1974
double zmin
Definition: liblwgeom.h:280
static size_t pointArray_toGML2(POINTARRAY *pa, char *buf, int precision)
Definition: lwout_gml.c:649
void * lwalloc(size_t size)
Definition: lwutil.c:199
double y
Definition: liblwgeom.h:336
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