mirror of
https://git.osgeo.org/gitea/postgis/postgis
synced 2024-10-25 09:32:46 +00:00
35cc4f879f
git-svn-id: http://svn.osgeo.org/postgis/trunk@607 b70326c6-7e19-0410-871a-916f4a2858ee
775 lines
16 KiB
C
775 lines
16 KiB
C
/*
|
|
* Written by Ralph Mason ralph.mason<at>telogis.com
|
|
*
|
|
* Copyright Telogis 2004
|
|
* www.telogis.com
|
|
*
|
|
*/
|
|
#include "wktparse.h"
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
/*
|
|
//To get byte order
|
|
#include <sys/types.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
*/
|
|
|
|
|
|
static int endian_check_int = 1; // dont modify this!!!
|
|
|
|
#undef LITTLE_ENDIAN
|
|
#define LITTLE_ENDIAN 1
|
|
static char getMachineEndian()
|
|
{
|
|
return *((char *) &endian_check_int); // 0 = big endian, 1 = little endian
|
|
}
|
|
|
|
|
|
typedef unsigned long int4;
|
|
|
|
typedef struct tag_tuple tuple;
|
|
|
|
struct tag_outputstate{
|
|
byte* pos;
|
|
};
|
|
|
|
typedef struct tag_outputstate output_state;
|
|
typedef void (*output_func)(tuple* this,output_state* out);
|
|
typedef void (*read_col_func)(const char**f);
|
|
|
|
|
|
|
|
/* Globals */
|
|
|
|
int srid=-1;
|
|
|
|
static int ferror_occured;
|
|
static allocator local_malloc;
|
|
static report_error error_func;
|
|
|
|
struct tag_tuple{
|
|
output_func of;
|
|
union {
|
|
double points[4];
|
|
int4 pointsi[4];
|
|
|
|
struct{
|
|
tuple* stack_next;
|
|
int type;
|
|
int num;
|
|
int size_here;
|
|
};
|
|
};
|
|
tuple* next;
|
|
};
|
|
|
|
struct {
|
|
int type;
|
|
int flags;
|
|
int srid;
|
|
int ndims;
|
|
/* create integer version */
|
|
int lwgi;
|
|
/* input is integer (wkb only)*/
|
|
int from_lwgi;
|
|
|
|
int4 alloc_size;
|
|
|
|
/*
|
|
linked list of all tuples
|
|
*/
|
|
tuple* first;
|
|
tuple* last;
|
|
|
|
/*
|
|
stack of open geometries
|
|
*/
|
|
tuple* stack;
|
|
|
|
} the_geom;
|
|
|
|
tuple* free_list=0;
|
|
int minpoints;
|
|
|
|
|
|
/* External functions */
|
|
extern void init_parser(const char *);
|
|
|
|
/* Prototypes */
|
|
tuple* alloc_tuple(output_func of,size_t size);
|
|
static void error(const char* err);
|
|
void free_tuple(tuple* to_free);
|
|
void inc_num(void);
|
|
void alloc_stack_tuple(int type,output_func of,size_t size);
|
|
void check_dims(int num);
|
|
void WRITE_DOUBLES(output_state* out,double* points, int cnt);
|
|
#ifdef SHRINK_INTS
|
|
void WRITE_INT4(output_state * out,int4 val);
|
|
#endif
|
|
void write_size(tuple* this,output_state* out);
|
|
void alloc_lwgeom(int srid);
|
|
void write_point_2(tuple* this,output_state* out);
|
|
void write_point_3(tuple* this,output_state* out);
|
|
void write_point_4(tuple* this,output_state* out);
|
|
void write_point_2i(tuple* this,output_state* out);
|
|
void write_point_3i(tuple* this,output_state* out);
|
|
void write_point_4i(tuple* this,output_state* out);
|
|
void alloc_point_2d(double x,double y);
|
|
void alloc_point_3d(double x,double y,double z);
|
|
void alloc_point_4d(double x,double y,double z,double m);
|
|
void write_type(tuple* this,output_state* out);
|
|
void write_count(tuple* this,output_state* out);
|
|
void write_type_count(tuple* this,output_state* out);
|
|
void alloc_point(void);
|
|
void alloc_linestring(void);
|
|
void alloc_polygon(void);
|
|
void alloc_multipoint(void);
|
|
void alloc_multilinestring(void);
|
|
void alloc_multipolygon(void);
|
|
void alloc_geomertycollection(void);
|
|
void alloc_counter(void);
|
|
void alloc_empty(void);
|
|
byte* make_lwgeom(void);
|
|
int lwg_parse_yyerror(char* s);
|
|
byte strhex_readbyte(const char* in);
|
|
byte read_wkb_byte(const char** in);
|
|
void read_wkb_bytes(const char** in,byte* out, int cnt);
|
|
int4 read_wkb_int(const char** in);
|
|
double read_wbk_double(const char** in,int convert_from_int);
|
|
void read_wkb_point(const char** b);
|
|
void read_collection(const char** b,read_col_func f);
|
|
void read_collection2(const char** b);
|
|
void parse_wkb(const char** b);
|
|
void alloc_wkb(const char* parser);
|
|
byte* parse_it(const char* geometry,allocator allocfunc,report_error errfunc);
|
|
byte* parse_lwg(const char* geometry,allocator allocfunc,report_error errfunc);
|
|
byte* parse_lwgi(const char* geometry,allocator allocfunc,report_error errfunc);
|
|
|
|
void set_srid(double d_srid){
|
|
if ( d_srid >= 0 )
|
|
d_srid+=0.1;
|
|
else
|
|
d_srid-=0.1;
|
|
|
|
|
|
srid=(int)(d_srid+0.1);
|
|
}
|
|
|
|
tuple* alloc_tuple(output_func of,size_t size){
|
|
tuple* ret = free_list;
|
|
|
|
if ( ! ret ){
|
|
int toalloc = (ALLOC_CHUNKS /sizeof(tuple));
|
|
ret = malloc( toalloc *sizeof(tuple) );
|
|
|
|
free_list = ret;
|
|
|
|
while(--toalloc){
|
|
ret->next = ret+1;
|
|
ret++;
|
|
}
|
|
|
|
ret->next = NULL;
|
|
|
|
return alloc_tuple(of,size);
|
|
}
|
|
|
|
free_list = ret->next;
|
|
ret->of = of;
|
|
ret->next = NULL;
|
|
|
|
if ( the_geom.last ) {
|
|
the_geom.last->next = ret;
|
|
the_geom.last = ret;
|
|
}
|
|
else {
|
|
the_geom.first = the_geom.last = ret;
|
|
}
|
|
|
|
the_geom.alloc_size += size;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void error(const char* err){
|
|
error_func(err);
|
|
ferror_occured=1;
|
|
}
|
|
|
|
void free_tuple(tuple* to_free){
|
|
|
|
tuple* list_end = to_free;
|
|
|
|
if( !to_free)
|
|
return;
|
|
|
|
while(list_end->next){
|
|
list_end=list_end->next;
|
|
}
|
|
|
|
list_end->next = free_list;
|
|
free_list = to_free;
|
|
}
|
|
|
|
void inc_num(void){
|
|
the_geom.stack->num++;
|
|
}
|
|
|
|
/*
|
|
Allocate a 'counting' tuple
|
|
*/
|
|
void alloc_stack_tuple(int type,output_func of,size_t size){
|
|
tuple* p;
|
|
inc_num();
|
|
|
|
p = alloc_tuple(of,size);
|
|
p->stack_next = the_geom.stack;
|
|
p->type = type;
|
|
p->size_here = the_geom.alloc_size;
|
|
p->num = 0;
|
|
the_geom.stack = p;
|
|
}
|
|
|
|
void pop(void){
|
|
the_geom.stack = the_geom.stack->stack_next;
|
|
}
|
|
|
|
void popc(void){
|
|
if ( the_geom.stack->num < minpoints){
|
|
error("geometry requires more points");
|
|
}
|
|
the_geom.stack = the_geom.stack->stack_next;
|
|
}
|
|
|
|
|
|
void check_dims(int num){
|
|
|
|
if( the_geom.ndims != num){
|
|
if (the_geom.ndims) {
|
|
error("Can not mix dimentionality in a geometry");
|
|
}
|
|
else{
|
|
the_geom.ndims = num;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define WRITE_INT4_REAL(x,y) { memcpy(x->pos,&y,4); x->pos+=4;}
|
|
#define WRITE_INT4_REAL_MULTIPLE(x,y,z) { memcpy(x->pos,&y,z*4); x->pos+=(z*4);}
|
|
|
|
/*
|
|
we can shrink ints to one byte if they are less than 127
|
|
by setting the extra bit. Because if the different byte
|
|
ordering possibilities we need to set the lsb on little
|
|
endian to show a packed one and the msb on a big endian
|
|
machine
|
|
*/
|
|
#ifdef SHRINK_INTS
|
|
void WRITE_INT4(output_state * out,int4 val){
|
|
if ( val <= 0x7f ){
|
|
if ( getMachineEndian() == LITTLE_ENDIAN ){
|
|
val = (val<<1) | 1;
|
|
}
|
|
else{
|
|
val |=0x80;
|
|
}
|
|
|
|
*out->pos++ = (byte)val;
|
|
the_geom.alloc_size-=3;
|
|
}
|
|
else{
|
|
if ( getMachineEndian() == LITTLE_ENDIAN ){
|
|
val <<=1;
|
|
}
|
|
WRITE_INT4_REAL(out,val);
|
|
}
|
|
}
|
|
#else
|
|
#define WRITE_INT4 WRITE_INT4_REAL
|
|
#endif
|
|
|
|
|
|
void WRITE_DOUBLES(output_state* out,double* points, int cnt){
|
|
if ( the_geom.lwgi){
|
|
int4 vals[4];
|
|
int i;
|
|
|
|
for(i=0; i<cnt;i++){
|
|
vals[i] = (int4)(((points[i]+180.0)*0xB60B60)+.5);
|
|
}
|
|
memcpy(out->pos,vals,sizeof(int4)*cnt);
|
|
out->pos+=sizeof(int4)*cnt;
|
|
}
|
|
else{
|
|
memcpy(out->pos,points,sizeof(double)*cnt);
|
|
out->pos+=sizeof(double)*cnt;
|
|
}
|
|
|
|
}
|
|
|
|
void write_size(tuple* this,output_state* out){
|
|
WRITE_INT4_REAL(out,the_geom.alloc_size);
|
|
}
|
|
|
|
void alloc_lwgeom(int srid){
|
|
the_geom.srid=srid;
|
|
the_geom.alloc_size=0;
|
|
the_geom.stack=NULL;
|
|
the_geom.ndims=0;
|
|
|
|
//Free if used already
|
|
if ( the_geom.first ){
|
|
free_tuple(the_geom.first);
|
|
the_geom.first=the_geom.last=NULL;
|
|
}
|
|
|
|
if ( srid != -1 ){
|
|
the_geom.alloc_size+=4;
|
|
}
|
|
|
|
the_geom.stack = alloc_tuple(write_size,4);
|
|
}
|
|
|
|
|
|
void write_point_2(tuple* this,output_state* out){
|
|
WRITE_DOUBLES(out,this->points,2);
|
|
}
|
|
|
|
void write_point_3(tuple* this,output_state* out){
|
|
WRITE_DOUBLES(out,this->points,3);
|
|
}
|
|
void write_point_4(tuple* this,output_state* out){
|
|
WRITE_DOUBLES(out,this->points,4);
|
|
}
|
|
|
|
void write_point_2i(tuple* this,output_state* out){
|
|
WRITE_INT4_REAL_MULTIPLE(out,this->points,2);
|
|
}
|
|
|
|
void write_point_3i(tuple* this,output_state* out){
|
|
WRITE_INT4_REAL_MULTIPLE(out,this->points,3);
|
|
}
|
|
void write_point_4i(tuple* this,output_state* out){
|
|
WRITE_INT4_REAL_MULTIPLE(out,this->points,4);
|
|
}
|
|
|
|
void alloc_point_2d(double x,double y){
|
|
tuple* p = alloc_tuple(write_point_2,the_geom.lwgi?8:16);
|
|
p->points[0] = x;
|
|
p->points[1] = y;
|
|
inc_num();
|
|
check_dims(2);
|
|
}
|
|
|
|
void alloc_point_3d(double x,double y,double z){
|
|
tuple* p = alloc_tuple(write_point_3,the_geom.lwgi?12:24);
|
|
p->points[0] = x;
|
|
p->points[1] = y;
|
|
p->points[2] = z;
|
|
inc_num();
|
|
check_dims(3);
|
|
}
|
|
|
|
void alloc_point_4d(double x,double y,double z,double m){
|
|
tuple* p = alloc_tuple(write_point_4,the_geom.lwgi?16:32);
|
|
p->points[0] = x;
|
|
p->points[1] = y;
|
|
p->points[2] = z;
|
|
p->points[3] = m;
|
|
inc_num();
|
|
check_dims(4);
|
|
}
|
|
|
|
void write_type(tuple* this,output_state* out){
|
|
byte type=0;
|
|
|
|
//Empty handler - switch back
|
|
if ( this->type == 0xff )
|
|
this->type = COLLECTIONTYPE;
|
|
|
|
type |= this->type;
|
|
|
|
if (the_geom.ndims) //Support empty
|
|
type |= ((the_geom.ndims-2) << 4);
|
|
|
|
if ( the_geom.srid != -1 ){
|
|
type |= 0x40;
|
|
}
|
|
|
|
*(out->pos)=type;
|
|
out->pos++;
|
|
|
|
if ( the_geom.srid != -1 ){
|
|
//Only the first geometry will have a srid attached
|
|
WRITE_INT4(out,the_geom.srid);
|
|
the_geom.srid = -1;
|
|
}
|
|
}
|
|
|
|
void write_count(tuple* this,output_state* out){
|
|
int num = this->num;
|
|
WRITE_INT4(out,num);
|
|
}
|
|
|
|
void write_type_count(tuple* this,output_state* out){
|
|
write_type(this,out);
|
|
write_count(this,out);
|
|
}
|
|
|
|
void alloc_point(void){
|
|
if( the_geom.lwgi)
|
|
alloc_stack_tuple(POINTTYPEI,write_type,1);
|
|
else
|
|
alloc_stack_tuple(POINTTYPE,write_type,1);
|
|
|
|
minpoints=1;
|
|
}
|
|
|
|
void alloc_linestring(void){
|
|
if( the_geom.lwgi)
|
|
alloc_stack_tuple(LINETYPEI,write_type,1);
|
|
else
|
|
alloc_stack_tuple(LINETYPE,write_type,1);
|
|
|
|
minpoints=2;
|
|
}
|
|
|
|
void alloc_polygon(void){
|
|
if( the_geom.lwgi)
|
|
alloc_stack_tuple(POLYGONTYPEI, write_type,1);
|
|
else
|
|
alloc_stack_tuple(POLYGONTYPE, write_type,1);
|
|
|
|
minpoints=3;
|
|
}
|
|
|
|
void alloc_multipoint(void){
|
|
alloc_stack_tuple(MULTIPOINTTYPE,write_type,1);
|
|
}
|
|
|
|
void alloc_multilinestring(void){
|
|
alloc_stack_tuple(MULTILINETYPE,write_type,1);
|
|
}
|
|
|
|
void alloc_multipolygon(void){
|
|
alloc_stack_tuple(MULTIPOLYGONTYPE,write_type,1);
|
|
}
|
|
|
|
void alloc_geomertycollection(void){
|
|
alloc_stack_tuple(COLLECTIONTYPE,write_type,1);
|
|
}
|
|
|
|
void alloc_counter(void){
|
|
alloc_stack_tuple(0,write_count,4);
|
|
}
|
|
|
|
void alloc_empty(){
|
|
tuple* st = the_geom.stack;
|
|
//Find the last geometry
|
|
while(st->type == 0){
|
|
st =st->stack_next;
|
|
}
|
|
|
|
//Reclaim memory
|
|
free_tuple(st->next);
|
|
|
|
//Put an empty geometry collection on the top of the stack
|
|
st->next=NULL;
|
|
the_geom.stack=st;
|
|
the_geom.alloc_size=st->size_here;
|
|
|
|
//Mark as a empty stop
|
|
if (st->type != 0xFF){
|
|
st->type=0xFF;
|
|
st->of = write_type_count;
|
|
the_geom.alloc_size+=4;
|
|
st->size_here=the_geom.alloc_size;
|
|
}
|
|
|
|
st->num=0;
|
|
|
|
}
|
|
|
|
byte* make_lwgeom(){
|
|
byte* out_c;
|
|
output_state out;
|
|
tuple* cur;
|
|
out_c = (byte*)local_malloc(the_geom.alloc_size);
|
|
out.pos = out_c;
|
|
cur = the_geom.first ;
|
|
|
|
while(cur){
|
|
cur->of(cur,&out);
|
|
cur=cur->next;
|
|
}
|
|
|
|
//if ints shrink then we need to rewrite the size smaller
|
|
out.pos = out_c;
|
|
write_size(NULL,&out);
|
|
|
|
return out_c;
|
|
}
|
|
|
|
int lwg_parse_yyerror(char* s){
|
|
error("parse error - invalid geometry");
|
|
//error_func("parse error - invalid geometry");
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
Table below generated using this ruby.
|
|
|
|
a=(0..0xff).to_a.collect{|x|0xff};('0'..'9').each{|x|a[x[0]]=x[0]-'0'[0]}
|
|
('a'..'f').each{|x|v=x[0]-'a'[0]+10;a[x[0]]=a[x.upcase[0]]=v}
|
|
puts '{'+a.join(",")+'}'
|
|
|
|
*/
|
|
static const byte to_hex[] = {
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
0,1,2,3,4,5,6,7,8,9,255,255,255,255,255,255,255,10,11,12,13,14,
|
|
15,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,10,11,12,13,14,15,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|
255,255,255,255,255,255,255,255};
|
|
|
|
byte strhex_readbyte(const char* in){
|
|
if ( *in == 0 ){
|
|
if ( ! ferror_occured){
|
|
error("invalid wkb");
|
|
}
|
|
return 0;
|
|
}
|
|
return to_hex[(int)*in]<<4 | to_hex[(int)*(in+1)];
|
|
}
|
|
|
|
byte read_wkb_byte(const char** in){
|
|
byte ret = strhex_readbyte(*in);
|
|
(*in)+=2;
|
|
return ret;
|
|
}
|
|
|
|
int swap_order;
|
|
|
|
void read_wkb_bytes(const char** in,byte* out, int cnt){
|
|
if ( ! swap_order ){
|
|
while(cnt--) *out++ = read_wkb_byte(in);
|
|
}
|
|
else{
|
|
out += (cnt-1);
|
|
while(cnt--) *out-- = read_wkb_byte(in);
|
|
}
|
|
}
|
|
|
|
int4 read_wkb_int(const char** in){
|
|
int4 ret;
|
|
read_wkb_bytes(in,(byte*)&ret,4);
|
|
return ret;
|
|
}
|
|
|
|
double read_wbk_double(const char** in,int convert_from_int){
|
|
double ret;
|
|
|
|
if ( ! convert_from_int){
|
|
read_wkb_bytes(in,(byte*)&ret,8);
|
|
return ret;
|
|
}else{
|
|
ret = read_wkb_int(in);
|
|
ret /= 0xb60b60;
|
|
return ret-180.0;
|
|
}
|
|
}
|
|
|
|
void read_wkb_point(const char** b){
|
|
int i;
|
|
tuple* p = NULL;
|
|
|
|
|
|
if(the_geom.lwgi && the_geom.from_lwgi ){
|
|
//Special case - reading from lwgi to lwgi
|
|
//we don't want to go via doubles in the middle.
|
|
switch(the_geom.ndims){
|
|
case 2: p=alloc_tuple(write_point_2i,8); break;
|
|
case 3: p=alloc_tuple(write_point_3i,12); break;
|
|
case 4: p=alloc_tuple(write_point_4i,16); break;
|
|
}
|
|
|
|
for(i=0;i<the_geom.ndims;i++){
|
|
p->pointsi[i]=read_wkb_int(b);
|
|
}
|
|
}
|
|
else{
|
|
int mul = the_geom.lwgi ? 1 : 2;
|
|
|
|
switch(the_geom.ndims){
|
|
case 2: p=alloc_tuple(write_point_2,8*mul); break;
|
|
case 3: p=alloc_tuple(write_point_3,12*mul); break;
|
|
case 4: p=alloc_tuple(write_point_4,16*mul); break;
|
|
}
|
|
|
|
for(i=0;i<the_geom.ndims;i++){
|
|
p->points[i]=read_wbk_double(b,the_geom.from_lwgi);
|
|
}
|
|
}
|
|
|
|
inc_num();
|
|
check_dims(the_geom.ndims);
|
|
}
|
|
|
|
void read_collection(const char** b,read_col_func f){
|
|
int4 cnt=read_wkb_int(b);
|
|
alloc_counter();
|
|
|
|
while(cnt--){
|
|
if ( ferror_occured ) return;
|
|
f(b);
|
|
}
|
|
|
|
pop();
|
|
}
|
|
|
|
void read_collection2(const char** b){
|
|
return read_collection(b,read_wkb_point);
|
|
}
|
|
|
|
void parse_wkb(const char** b){
|
|
int4 type;
|
|
byte xdr = read_wkb_byte(b);
|
|
swap_order=0;
|
|
|
|
if ( xdr == 0x01 ){ // wkb is in little endian
|
|
if ( getMachineEndian() != LITTLE_ENDIAN )
|
|
swap_order=1;
|
|
}
|
|
else if ( xdr == 0x00 ){ // wkb is in big endian
|
|
if ( getMachineEndian() == LITTLE_ENDIAN )
|
|
swap_order=1;
|
|
}
|
|
|
|
type = read_wkb_int(b);
|
|
|
|
|
|
|
|
|
|
//quick exit on error
|
|
if ( ferror_occured ) return;
|
|
|
|
if (type & 0x80000000)
|
|
the_geom.ndims=3;
|
|
else if (type & 0x40000000)
|
|
the_geom.ndims=4;
|
|
else
|
|
the_geom.ndims=2;
|
|
|
|
type &=0x0f;
|
|
|
|
if ( the_geom.lwgi ){
|
|
|
|
if ( type<= POLYGONTYPE )
|
|
alloc_stack_tuple(type +9,write_type,1);
|
|
else
|
|
alloc_stack_tuple(type,write_type,1);
|
|
}
|
|
else{
|
|
//If we are writing lwg and are reading wbki
|
|
int4 towrite=type;
|
|
if (towrite > COLLECTIONTYPE ){
|
|
towrite-=9;
|
|
}
|
|
alloc_stack_tuple(towrite,write_type,1);
|
|
}
|
|
|
|
switch(type ){
|
|
case POINTTYPE:
|
|
read_wkb_point(b);
|
|
break;
|
|
|
|
case LINETYPE:
|
|
read_collection(b,read_wkb_point);
|
|
break;
|
|
|
|
case POLYGONTYPE:
|
|
read_collection(b,read_collection2);
|
|
break;
|
|
|
|
case MULTIPOINTTYPE:
|
|
case MULTILINETYPE:
|
|
case MULTIPOLYGONTYPE:
|
|
case COLLECTIONTYPE:
|
|
read_collection(b,parse_wkb);
|
|
break;
|
|
|
|
case POINTTYPEI:
|
|
the_geom.from_lwgi=1;
|
|
read_wkb_point(b);
|
|
break;
|
|
|
|
case LINETYPEI:
|
|
the_geom.from_lwgi=1;
|
|
read_collection(b,read_wkb_point);
|
|
break;
|
|
|
|
case POLYGONTYPEI:
|
|
the_geom.from_lwgi=1;
|
|
read_collection(b,read_collection2);
|
|
break;
|
|
|
|
default:
|
|
error("Invalid type in wbk");
|
|
}
|
|
|
|
the_geom.from_lwgi=0;
|
|
|
|
pop();
|
|
}
|
|
|
|
|
|
void alloc_wkb(const char* parser){
|
|
parse_wkb(&parser);
|
|
}
|
|
|
|
/*
|
|
Parse a string and return a LW_GEOM
|
|
*/
|
|
byte* parse_it(const char* geometry,allocator allocfunc,report_error errfunc){
|
|
|
|
local_malloc = allocfunc;
|
|
error_func=errfunc;
|
|
|
|
ferror_occured = 0;
|
|
|
|
init_parser(geometry);
|
|
lwg_parse_yyparse();
|
|
close_parser();
|
|
|
|
if (ferror_occured)
|
|
return NULL;
|
|
|
|
return make_lwgeom();
|
|
}
|
|
|
|
byte* parse_lwg(const char* geometry,allocator allocfunc,report_error errfunc){
|
|
the_geom.lwgi=0;
|
|
return parse_it(geometry,allocfunc,errfunc);
|
|
}
|
|
|
|
byte* parse_lwgi(const char* geometry,allocator allocfunc,report_error errfunc){
|
|
the_geom.lwgi=1;
|
|
return parse_it(geometry,allocfunc,errfunc);
|
|
}
|
|
|
|
|
|
|