1.1 --- a/latlon-v0010.c	Thu Oct 23 10:16:01 2025 +0200
     1.2 +++ b/latlon-v0010.c	Thu Oct 23 10:39:05 2025 +0200
     1.3 @@ -215,7 +215,7 @@
     1.4    /* determine total number of points */
     1.5    for (i=0; i<nentries; i++) npoints += entries[i].npoints;
     1.6    /* allocate memory for cluster (including entries and points) */
     1.7 -  cluster = palloc(points_offset + npoints * sizeof(pgl_point));
     1.8 +  cluster = palloc0(points_offset + npoints * sizeof(pgl_point));
     1.9    /* re-count total number of points to determine offset for each entry */
    1.10    npoints = 0;
    1.11    /* copy entries and points */
    1.12 @@ -1109,7 +1109,7 @@
    1.13    }
    1.14    /* otherwise create sample points for numerical integration and determine
    1.15       area covered by sample points */
    1.16 -  points = palloc(samples * sizeof(pgl_point));
    1.17 +  points = palloc0(samples * sizeof(pgl_point));
    1.18    area = pgl_sample_points(
    1.19      &cluster->bounding.center,
    1.20      cluster->bounding.radius + distance,  /* pad bounding circle by distance */
    1.21 @@ -1658,7 +1658,7 @@
    1.22  /* create point ("epoint" in SQL) from latitude and longitude */
    1.23  PG_FUNCTION_INFO_V1(pgl_create_epoint);
    1.24  Datum pgl_create_epoint(PG_FUNCTION_ARGS) {
    1.25 -  pgl_point *point = (pgl_point *)palloc(sizeof(pgl_point));
    1.26 +  pgl_point *point = (pgl_point *)palloc0(sizeof(pgl_point));
    1.27    pgl_epoint_set_latlon(point, PG_GETARG_FLOAT8(0), PG_GETARG_FLOAT8(1));
    1.28    PG_RETURN_POINTER(point);
    1.29  }
    1.30 @@ -1685,7 +1685,7 @@
    1.31      ));
    1.32    }
    1.33    /* allocate memory for result */
    1.34 -  point = (pgl_point *)palloc(sizeof(pgl_point));
    1.35 +  point = (pgl_point *)palloc0(sizeof(pgl_point));
    1.36    /* set latitude and longitude (and perform checks) */
    1.37    pgl_epoint_set_latlon(point, lat, lon);
    1.38    /* return result */
    1.39 @@ -1718,7 +1718,7 @@
    1.40     ("epoint_with_sample_count" in SQL) from epoint and integer */
    1.41  PG_FUNCTION_INFO_V1(pgl_create_epoint_with_sample_count);
    1.42  Datum pgl_create_epoint_with_sample_count(PG_FUNCTION_ARGS) {
    1.43 -  pgl_point_sc *search = (pgl_point_sc *)palloc(sizeof(pgl_point_sc));
    1.44 +  pgl_point_sc *search = (pgl_point_sc *)palloc0(sizeof(pgl_point_sc));
    1.45    search->point = *(pgl_point *)PG_GETARG_POINTER(0);
    1.46    pgl_epoint_set_sample_count(search, PG_GETARG_INT32(1));
    1.47    PG_RETURN_POINTER(search);
    1.48 @@ -1754,7 +1754,7 @@
    1.49      ));
    1.50    }
    1.51    /* allocate memory for result */
    1.52 -  search = (pgl_point_sc *)palloc(sizeof(pgl_point_sc));
    1.53 +  search = (pgl_point_sc *)palloc0(sizeof(pgl_point_sc));
    1.54    /* set latitude, longitude, and sample count (while performing checks) */
    1.55    pgl_epoint_set_latlon(&search->point, lat, lon);
    1.56    pgl_epoint_set_sample_count(search, samples);
    1.57 @@ -1765,7 +1765,7 @@
    1.58  /* create box ("ebox" in SQL) that is empty */
    1.59  PG_FUNCTION_INFO_V1(pgl_create_empty_ebox);
    1.60  Datum pgl_create_empty_ebox(PG_FUNCTION_ARGS) {
    1.61 -  pgl_box *box = (pgl_box *)palloc(sizeof(pgl_box));
    1.62 +  pgl_box *box = (pgl_box *)palloc0(sizeof(pgl_box));
    1.63    pgl_box_set_empty(box);
    1.64    PG_RETURN_POINTER(box);
    1.65  }
    1.66 @@ -1832,7 +1832,7 @@
    1.67  /* create box ("ebox" in SQL) from min/max latitude and min/max longitude */
    1.68  PG_FUNCTION_INFO_V1(pgl_create_ebox);
    1.69  Datum pgl_create_ebox(PG_FUNCTION_ARGS) {
    1.70 -  pgl_box *box = (pgl_box *)palloc(sizeof(pgl_box));
    1.71 +  pgl_box *box = (pgl_box *)palloc0(sizeof(pgl_box));
    1.72    pgl_ebox_set_boundaries(
    1.73      box,
    1.74      PG_GETARG_FLOAT8(0), PG_GETARG_FLOAT8(1),
    1.75 @@ -1847,7 +1847,7 @@
    1.76  Datum pgl_create_ebox_from_epoints(PG_FUNCTION_ARGS) {
    1.77    pgl_point *point1 = (pgl_point *)PG_GETARG_POINTER(0);
    1.78    pgl_point *point2 = (pgl_point *)PG_GETARG_POINTER(1);
    1.79 -  pgl_box *box = (pgl_box *)palloc(sizeof(pgl_box));
    1.80 +  pgl_box *box = (pgl_box *)palloc0(sizeof(pgl_box));
    1.81    double lat_min, lat_max, lon_min, lon_max;
    1.82    double dlon;  /* longitude range (delta longitude) */
    1.83    /* order latitude and longitude boundaries */
    1.84 @@ -1911,7 +1911,7 @@
    1.85    sscanf(strptr, " empty %n", &valid);
    1.86    if (valid && strptr[valid] == 0) {
    1.87      /* allocate and return empty box */
    1.88 -    box = (pgl_box *)palloc(sizeof(pgl_box));
    1.89 +    box = (pgl_box *)palloc0(sizeof(pgl_box));
    1.90      pgl_box_set_empty(box);
    1.91      PG_RETURN_POINTER(box);
    1.92    }
    1.93 @@ -1946,7 +1946,7 @@
    1.94    if (lat_min > lat_max) { val = lat_min; lat_min = lat_max; lat_max = val; }
    1.95    if (lon_min > lon_max) { val = lon_min; lon_min = lon_max; lon_max = val; }
    1.96    /* allocate memory for result */
    1.97 -  box = (pgl_box *)palloc(sizeof(pgl_box));
    1.98 +  box = (pgl_box *)palloc0(sizeof(pgl_box));
    1.99    /* set boundaries (and perform checks) */
   1.100    pgl_ebox_set_boundaries(box, lat_min, lat_max, lon_min, lon_max);
   1.101    /* return result */
   1.102 @@ -1980,7 +1980,7 @@
   1.103  /* create circle ("ecircle" in SQL) from latitude, longitude, and radius */
   1.104  PG_FUNCTION_INFO_V1(pgl_create_ecircle);
   1.105  Datum pgl_create_ecircle(PG_FUNCTION_ARGS) {
   1.106 -  pgl_circle *circle = (pgl_circle *)palloc(sizeof(pgl_circle));
   1.107 +  pgl_circle *circle = (pgl_circle *)palloc0(sizeof(pgl_circle));
   1.108    pgl_ecircle_set_latlon_radius(
   1.109      circle, PG_GETARG_FLOAT8(0), PG_GETARG_FLOAT8(1), PG_GETARG_FLOAT8(2)
   1.110    );
   1.111 @@ -1992,7 +1992,7 @@
   1.112  Datum pgl_create_ecircle_from_epoint(PG_FUNCTION_ARGS) {
   1.113    pgl_point *point = (pgl_point *)PG_GETARG_POINTER(0);
   1.114    double radius = PG_GETARG_FLOAT8(1);
   1.115 -  pgl_circle *circle = (pgl_circle *)palloc(sizeof(pgl_circle));
   1.116 +  pgl_circle *circle = (pgl_circle *)palloc0(sizeof(pgl_circle));
   1.117    /* set latitude, longitude, radius (and perform checks) */
   1.118    pgl_ecircle_set_latlon_radius(circle, point->lat, point->lon, radius);
   1.119    /* return result */
   1.120 @@ -2028,7 +2028,7 @@
   1.121      ));
   1.122    }
   1.123    /* allocate memory for result */
   1.124 -  circle = (pgl_circle *)palloc(sizeof(pgl_circle));
   1.125 +  circle = (pgl_circle *)palloc0(sizeof(pgl_circle));
   1.126    /* set latitude, longitude, radius (and perform checks) */
   1.127    pgl_ecircle_set_latlon_radius(circle, lat, lon, radius);
   1.128    /* return result */
   1.129 @@ -2062,7 +2062,7 @@
   1.130    /* reset reading position to start of (lowercase) string */
   1.131    strptr = str_lower;
   1.132    /* allocate initial buffer for entries */
   1.133 -  entries = palloc(entries_buflen * sizeof(pgl_newentry));
   1.134 +  entries = palloc0(entries_buflen * sizeof(pgl_newentry));
   1.135    /* parse until end of string */
   1.136    while (strptr[0]) {
   1.137      /* require previous white-space or closing parenthesis before next token */
   1.138 @@ -2107,7 +2107,7 @@
   1.139      if (nentries == entries_buflen) {
   1.140        pgl_newentry *newbuf;
   1.141        entries_buflen *= 2;
   1.142 -      newbuf = palloc(entries_buflen * sizeof(pgl_newentry));
   1.143 +      newbuf = palloc0(entries_buflen * sizeof(pgl_newentry));
   1.144        memcpy(newbuf, entries, nentries * sizeof(pgl_newentry));
   1.145        pfree(entries);
   1.146        entries = newbuf;
   1.147 @@ -2116,7 +2116,7 @@
   1.148      npoints = 0;
   1.149      /* allocate array for points */
   1.150      points_buflen = 4;
   1.151 -    points = palloc(points_buflen * sizeof(pgl_point));
   1.152 +    points = palloc0(points_buflen * sizeof(pgl_point));
   1.153      /* parse until closing parenthesis */
   1.154      while (strptr[0] != ')') {
   1.155        /* error on unexpected end of string */
   1.156 @@ -2147,7 +2147,7 @@
   1.157        if (npoints == points_buflen) {
   1.158          pgl_point *newbuf;
   1.159          points_buflen *= 2;
   1.160 -        newbuf = palloc(points_buflen * sizeof(pgl_point));
   1.161 +        newbuf = palloc0(points_buflen * sizeof(pgl_point));
   1.162          memcpy(newbuf, points, npoints * sizeof(pgl_point));
   1.163          pfree(points);
   1.164          points = newbuf;
   1.165 @@ -2358,7 +2358,7 @@
   1.166  PG_FUNCTION_INFO_V1(pgl_epoint_recv);
   1.167  Datum pgl_epoint_recv(PG_FUNCTION_ARGS) {
   1.168    StringInfo buf = (StringInfo)PG_GETARG_POINTER(0);
   1.169 -  pgl_point *point = (pgl_point *)palloc(sizeof(pgl_point));
   1.170 +  pgl_point *point = (pgl_point *)palloc0(sizeof(pgl_point));
   1.171    point->lat = pq_getmsgfloat8(buf);
   1.172    point->lon = pq_getmsgfloat8(buf);
   1.173    PG_RETURN_POINTER(point);
   1.174 @@ -2368,7 +2368,7 @@
   1.175  PG_FUNCTION_INFO_V1(pgl_ebox_recv);
   1.176  Datum pgl_ebox_recv(PG_FUNCTION_ARGS) {
   1.177    StringInfo buf = (StringInfo)PG_GETARG_POINTER(0);
   1.178 -  pgl_box *box = (pgl_box *)palloc(sizeof(pgl_box));
   1.179 +  pgl_box *box = (pgl_box *)palloc0(sizeof(pgl_box));
   1.180    box->lat_min = pq_getmsgfloat8(buf);
   1.181    box->lat_max = pq_getmsgfloat8(buf);
   1.182    box->lon_min = pq_getmsgfloat8(buf);
   1.183 @@ -2380,7 +2380,7 @@
   1.184  PG_FUNCTION_INFO_V1(pgl_ecircle_recv);
   1.185  Datum pgl_ecircle_recv(PG_FUNCTION_ARGS) {
   1.186    StringInfo buf = (StringInfo)PG_GETARG_POINTER(0);
   1.187 -  pgl_circle *circle = (pgl_circle *)palloc(sizeof(pgl_circle));
   1.188 +  pgl_circle *circle = (pgl_circle *)palloc0(sizeof(pgl_circle));
   1.189    circle->center.lat = pq_getmsgfloat8(buf);
   1.190    circle->center.lon = pq_getmsgfloat8(buf);
   1.191    circle->radius = pq_getmsgfloat8(buf);
   1.192 @@ -2431,7 +2431,7 @@
   1.193  PG_FUNCTION_INFO_V1(pgl_epoint_to_ebox);
   1.194  Datum pgl_epoint_to_ebox(PG_FUNCTION_ARGS) {
   1.195    pgl_point *point = (pgl_point *)PG_GETARG_POINTER(0);
   1.196 -  pgl_box *box = palloc(sizeof(pgl_box));
   1.197 +  pgl_box *box = palloc0(sizeof(pgl_box));
   1.198    box->lat_min = point->lat;
   1.199    box->lat_max = point->lat;
   1.200    box->lon_min = point->lon;
   1.201 @@ -2443,7 +2443,7 @@
   1.202  PG_FUNCTION_INFO_V1(pgl_epoint_to_ecircle);
   1.203  Datum pgl_epoint_to_ecircle(PG_FUNCTION_ARGS) {
   1.204    pgl_point *point = (pgl_point *)PG_GETARG_POINTER(0);
   1.205 -  pgl_circle *circle = palloc(sizeof(pgl_box));
   1.206 +  pgl_circle *circle = palloc0(sizeof(pgl_box));
   1.207    circle->center = *point;
   1.208    circle->radius = 0;
   1.209    PG_RETURN_POINTER(circle);