lwgeom_parse_wkt()

int lwgeom_parse_wkt	(	LWGEOM_PARSER_RESULT *	parser_result,
		char *	wktstr,
		int	parser_check_flags
	)

Parse a WKT geometry string into an LWGEOM structure.

Note that this process uses globals and is not re-entrant, so don't call it within itself (eg, from within other functions in lwin_wkt.c) or from a threaded program. Note that parser_result.wkinput picks up a reference to wktstr.

Definition at line 122 of file lwin_wkt_parse.c.

{
        int parse_rv = 0;
 
        /* Clean up our global parser result. */
        lwgeom_parser_result_init(&global_parser_result);
        /* Work-around possible bug in GNU Bison 3.0.2 resulting in wkt_yylloc
         * members not being initialized on yyparse() as documented here:
         * https://www.gnu.org/software/bison/manual/html_node/Location-Type.html
         * See discussion here:
         * http://lists.osgeo.org/pipermail/postgis-devel/2014-September/024506.html
         */
        wkt_yylloc.last_column = wkt_yylloc.last_line = \
                wkt_yylloc.first_column = wkt_yylloc.first_line = 1;
 
        /* Set the input text string, and parse checks. */
        global_parser_result.wkinput = wktstr;
        global_parser_result.parser_check_flags = parser_check_flags;
 
        wkt_lexer_init(wktstr); /* Lexer ready */
        parse_rv = wkt_yyparse(); /* Run the parse */
        LWDEBUGF(4,"wkt_yyparse returned %d", parse_rv);
        wkt_lexer_close(); /* Clean up lexer */
 
        /* A non-zero parser return is an error. */
        if ( parse_rv || global_parser_result.errcode )
        {
                if( ! global_parser_result.errcode )
                {
                        global_parser_result.errcode = PARSER_ERROR_OTHER;
                        global_parser_result.message = parser_error_messages[PARSER_ERROR_OTHER];
                        global_parser_result.errlocation = wkt_yylloc.last_column;
                }
                else if (global_parser_result.geom)
                {
                        lwgeom_free(global_parser_result.geom);
                        global_parser_result.geom = NULL;
                }
 
                LWDEBUGF(5, "error returned by wkt_yyparse() @ %d: [%d] '%s'",
                            global_parser_result.errlocation,
                            global_parser_result.errcode,
                            global_parser_result.message);
 
                /* Copy the global values into the return pointer */
                *parser_result = global_parser_result;
                wkt_yylex_destroy();
                return LW_FAILURE;
        }
 
        /* Copy the global value into the return pointer */
        *parser_result = global_parser_result;
        wkt_yylex_destroy();
        return LW_SUCCESS;
}

References struct_lwgeom_parser_result::errcode, struct_lwgeom_parser_result::errlocation, YYLTYPE::first_line, struct_lwgeom_parser_result::geom, global_parser_result, YYLTYPE::last_column, YYLTYPE::last_line, LW_FAILURE, LW_SUCCESS, LWDEBUGF, lwgeom_free(), lwgeom_parser_result_init(), struct_lwgeom_parser_result::message, struct_lwgeom_parser_result::parser_check_flags, parser_error_messages, PARSER_ERROR_OTHER, struct_lwgeom_parser_result::wkinput, wkt_lexer_close(), wkt_lexer_init(), wkt_yylex_destroy(), wkt_yylloc, and wkt_yyparse().

Referenced by cu_twkb_in(), cu_wkb_in(), cu_wkb_malformed_in(), cu_wkt_in(), geography_from_text(), geography_in(), lwgeom_from_text(), LWGEOM_from_text(), lwgeom_from_wkt(), LWGEOM_in(), test_wkt_double(), and test_wkt_in_errlocation().

Here is the call graph for this function:

Here is the caller graph for this function: