Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 284 insertions, 0 deletions

diff --git a/storage/myisam/sp_key.c b/storage/myisam/sp_key.c
new file mode 100644
index 00000000..4c6ef759
--- /dev/null
+++ b/storage/myisam/sp_key.c
@@ -0,0 +1,284 @@
+/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#include "myisamdef.h"
+
+#ifdef HAVE_SPATIAL
+
+#include "sp_defs.h"
+
+static int sp_add_point_to_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                             uchar byte_order, double *mbr);
+static int sp_get_point_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                           uchar byte_order, double *mbr);
+static int sp_get_linestring_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                                uchar byte_order, double *mbr);
+static int sp_get_polygon_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                             uchar byte_order, double *mbr);
+static int sp_get_geometry_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                              double *mbr, int top);
+static int sp_mbr_from_wkb(uchar (*wkb), uint size, uint n_dims, double *mbr);
+
+uint sp_make_key(register MI_INFO *info, uint keynr, uchar *key,
+		 const uchar *record, my_off_t filepos)
+{
+  HA_KEYSEG *keyseg;
+  MI_KEYDEF *keyinfo = &info->s->keyinfo[keynr];
+  uint len = 0;
+  uchar *pos;
+  uint dlen;
+  uchar *dptr;
+  double mbr[SPDIMS * 2];
+  uint i;
+  
+  keyseg = &keyinfo->seg[-1];
+  pos = (uchar*)record + keyseg->start;
+  
+  dlen = _mi_calc_blob_length(keyseg->bit_start, pos);
+  memcpy(&dptr, pos + keyseg->bit_start, sizeof(char*));
+  if (!dptr)
+  {
+    my_errno= HA_ERR_NULL_IN_SPATIAL;
+    return 0;
+  }
+  sp_mbr_from_wkb(dptr + 4, dlen - 4, SPDIMS, mbr);	/* SRID */
+  
+  for (i = 0, keyseg = keyinfo->seg; keyseg->type; keyseg++, i++)
+  {
+    uint length = keyseg->length, start= keyseg->start;
+    double val;
+
+    DBUG_ASSERT(length == sizeof(double));
+    DBUG_ASSERT(!(start % sizeof(double)));
+    DBUG_ASSERT(start < sizeof(mbr));
+    DBUG_ASSERT(keyseg->type == HA_KEYTYPE_DOUBLE);
+    
+    val= mbr[start / sizeof (double)];
+    if (isnan(val))
+    {
+      bzero(key, length);
+      key+= length;
+      len+= length;
+      continue;
+    }
+
+    if (keyseg->flag & HA_SWAP_KEY)
+    {
+      uchar buf[sizeof(double)];
+
+      float8store(buf, val);
+      pos= &buf[length];
+      while (pos > buf)
+        *key++ = *--pos;
+    }
+    else
+    {
+      float8store((uchar *)key, val);
+      key += length;
+    }
+    len+= length;
+  }
+  _mi_dpointer(info, key, filepos);
+  return len;
+}
+
+/*
+Calculate minimal bounding rectangle (mbr) of the spatial object
+stored in "well-known binary representation" (wkb) format.
+*/
+static int sp_mbr_from_wkb(uchar *wkb, uint size, uint n_dims, double *mbr)
+{
+  uint i;
+
+  for (i=0; i < n_dims; ++i)
+  {
+    mbr[i * 2] = DBL_MAX;
+    mbr[i * 2 + 1] = -DBL_MAX;
+  }
+
+  return sp_get_geometry_mbr(&wkb, wkb + size, n_dims, mbr, 1);
+}
+
+/*
+  Add one point stored in wkb to mbr
+*/
+
+static int sp_add_point_to_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+			       uchar byte_order __attribute__((unused)),
+			       double *mbr)
+{
+  double ord;
+  double *mbr_end= mbr + n_dims * 2;
+
+  while (mbr < mbr_end)
+  {
+    if ((*wkb) > end - 8)
+      return -1;
+    float8get(ord, (const uchar*) *wkb);
+    (*wkb)+= 8;
+    if (ord < *mbr)
+      *mbr= ord;
+    mbr++;
+    if (ord > *mbr)
+      *mbr= ord;
+    mbr++;
+  }
+  return 0;
+}
+
+
+static int sp_get_point_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                           uchar byte_order, double *mbr)
+{
+  return sp_add_point_to_mbr(wkb, end, n_dims, byte_order, mbr);
+}
+
+
+static int sp_get_linestring_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                                  uchar byte_order, double *mbr)
+{
+  uint n_points;
+
+  n_points = uint4korr(*wkb);
+  (*wkb) += 4;
+  for (; n_points > 0; --n_points)
+  {
+    /* Add next point to mbr */
+    if (sp_add_point_to_mbr(wkb, end, n_dims, byte_order, mbr))
+      return -1;
+  }
+  return 0;
+}
+
+
+static int sp_get_polygon_mbr(uchar *(*wkb), uchar *end, uint n_dims, 
+                               uchar byte_order, double *mbr)
+{
+  uint n_linear_rings;
+  uint n_points;
+
+  n_linear_rings = uint4korr((*wkb));
+  (*wkb) += 4;
+
+  for (; n_linear_rings > 0; --n_linear_rings)
+  {
+    n_points = uint4korr((*wkb));
+    (*wkb) += 4;
+    for (; n_points > 0; --n_points)
+    {
+      /* Add next point to mbr */
+      if (sp_add_point_to_mbr(wkb, end, n_dims, byte_order, mbr))
+        return -1;
+    }
+  }
+  return 0;
+}
+
+static int sp_get_geometry_mbr(uchar *(*wkb), uchar *end, uint n_dims,
+                              double *mbr, int top)
+{
+  int res;
+  uchar byte_order;
+  uint wkb_type;
+
+  byte_order = *(*wkb);
+  ++(*wkb);
+
+  wkb_type = uint4korr((*wkb));
+  (*wkb) += 4;
+
+  switch ((enum wkbType) wkb_type)
+  {
+    case wkbPoint:
+      res = sp_get_point_mbr(wkb, end, n_dims, byte_order, mbr);
+      break;
+    case wkbLineString:
+      res = sp_get_linestring_mbr(wkb, end, n_dims, byte_order, mbr);
+      break;
+    case wkbPolygon:
+      res = sp_get_polygon_mbr(wkb, end, n_dims, byte_order, mbr);
+      break;
+    case wkbMultiPoint:
+    {
+      uint n_items;
+      n_items = uint4korr((*wkb));
+      (*wkb) += 4;
+      for (; n_items > 0; --n_items)
+      {
+        byte_order = *(*wkb);
+        ++(*wkb);
+        (*wkb) += 4;
+        if (sp_get_point_mbr(wkb, end, n_dims, byte_order, mbr))
+          return -1;
+      }
+      res = 0;
+      break;
+    }
+    case wkbMultiLineString:
+    {
+      uint n_items;
+      n_items = uint4korr((*wkb));
+      (*wkb) += 4;
+      for (; n_items > 0; --n_items)
+      {
+        byte_order = *(*wkb);
+        ++(*wkb);
+        (*wkb) += 4;
+        if (sp_get_linestring_mbr(wkb, end, n_dims, byte_order, mbr))
+          return -1;
+      }
+      res = 0;
+      break;
+    }
+    case wkbMultiPolygon:
+    {
+      uint n_items;
+      n_items = uint4korr((*wkb));
+      (*wkb) += 4;
+      for (; n_items > 0; --n_items)
+      {
+        byte_order = *(*wkb);
+        ++(*wkb);
+        (*wkb) += 4;
+        if (sp_get_polygon_mbr(wkb, end, n_dims, byte_order, mbr))
+          return -1;
+      }
+      res = 0;
+      break;
+    }
+    case wkbGeometryCollection:
+    {
+      uint n_items;
+
+      if (!top)
+        return -1;
+
+      n_items = uint4korr((*wkb));
+      (*wkb) += 4;
+      for (; n_items > 0; --n_items)
+      {
+        if (sp_get_geometry_mbr(wkb, end, n_dims, mbr, 0))
+          return -1;
+      }
+      res = 0;
+      break;
+    }
+    default:
+      res = -1;
+  }
+  return res;
+}
+
+#endif /*HAVE_SPATIAL*/