PostGIS  2.4.9dev-r@@SVN_REVISION@@

◆ 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 126 of file lwin_wkt_parse.c.

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(), and test_wkt_in_errlocation().

127 {
128  int parse_rv = 0;
129 
130  /* Clean up our global parser result. */
132  /* Work-around possible bug in GNU Bison 3.0.2 resulting in wkt_yylloc
133  * members not being initialized on yyparse() as documented here:
134  * https://www.gnu.org/software/bison/manual/html_node/Location-Type.html
135  * See discussion here:
136  * http://lists.osgeo.org/pipermail/postgis-devel/2014-September/024506.html
137  */
139  wkt_yylloc.first_column = wkt_yylloc.first_line = 1;
140 
141  /* Set the input text string, and parse checks. */
142  global_parser_result.wkinput = wktstr;
143  global_parser_result.parser_check_flags = parser_check_flags;
144 
145  wkt_lexer_init(wktstr); /* Lexer ready */
146  parse_rv = wkt_yyparse(); /* Run the parse */
147  LWDEBUGF(4,"wkt_yyparse returned %d", parse_rv);
148  wkt_lexer_close(); /* Clean up lexer */
149 
150  /* A non-zero parser return is an error. */
151  if ( parse_rv || global_parser_result.errcode )
152  {
154  {
158  }
159  else if (global_parser_result.geom)
160  {
162  global_parser_result.geom = NULL;
163  }
164 
165  LWDEBUGF(5, "error returned by wkt_yyparse() @ %d: [%d] '%s'",
169 
170  /* Copy the global values into the return pointer */
171  *parser_result = global_parser_result;
173  return LW_FAILURE;
174  }
175 
176  /* Copy the global value into the return pointer */
177  *parser_result = global_parser_result;
179  return LW_SUCCESS;
180 }
int first_line
int wkt_yylex_destroy(void)
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1099
#define LW_SUCCESS
Definition: liblwgeom.h:80
#define LW_FAILURE
Definition: liblwgeom.h:79
void wkt_lexer_init(char *str)
int last_column
YYLTYPE wkt_yylloc
void wkt_lexer_close(void)
const char * parser_error_messages[]
Definition: lwin_wkt.c:37
void lwgeom_parser_result_init(LWGEOM_PARSER_RESULT *parser_result)
Definition: lwin_wkt.c:879
LWGEOM_PARSER_RESULT global_parser_result
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88
int wkt_yyparse(void)
#define PARSER_ERROR_OTHER
Definition: liblwgeom.h:2045
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