From e47bbb10486cf38a629aa0d493201af545340db2 Mon Sep 17 00:00:00 2001
From: Paul Ramsey <pramsey@cleverelephant.ca>
Date: Mon, 11 Feb 2019 17:17:03 +0000
Subject: [PATCH] Add lex initialization References #4017

git-svn-id: http://svn.osgeo.org/postgis/trunk@17234 b70326c6-7e19-0410-871a-916f4a2858ee
---
 liblwgeom/lwin_wkt_lex.l | 43 ++++++++++++++++++++--------------------
 1 file changed, 22 insertions(+), 21 deletions(-)

diff --git a/liblwgeom/lwin_wkt_lex.l b/liblwgeom/lwin_wkt_lex.l
index 234b64bbc..9ea931ed2 100644
--- a/liblwgeom/lwin_wkt_lex.l
+++ b/liblwgeom/lwin_wkt_lex.l
@@ -8,12 +8,12 @@
 #include "lwin_wkt_parse.h"
 #include "lwgeom_log.h"
 
-static YY_BUFFER_STATE wkt_yy_buf_state; 
+static YY_BUFFER_STATE wkt_yy_buf_state;
 
 /*
 * Handle errors due to unexpected junk in WKT strings.
 */
-static void wkt_lexer_unknown() 
+static void wkt_lexer_unknown()
 {
 	/* Set the global error state */
 	global_parser_result.errcode = PARSER_ERROR_OTHER;
@@ -21,8 +21,8 @@ static void wkt_lexer_unknown()
 	global_parser_result.errlocation = wkt_yylloc.last_column;
 }
 
-/* 
-* This macro is magically run after a rule is found but before the main 
+/*
+* This macro is magically run after a rule is found but before the main
 * action is run. We use it to update the parse location information
 * so we can report on where things fail. Also optionally to dump
 * debugging info.
@@ -34,7 +34,7 @@ static void wkt_lexer_unknown()
 	LWDEBUGF(5,"lex: %s", wkt_yytext); \
 	} while (0);
 
- 
+
 %}
 
 %option prefix="wkt_yy"
@@ -52,13 +52,13 @@ static void wkt_lexer_unknown()
 	LWDEBUG(5,"DOUBLE");
 	wkt_yylval.doublevalue = atof(wkt_yytext);
 	yyless(wkt_yyleng-1);
-	return DOUBLE_TOK; 
+	return DOUBLE_TOK;
 	}
 
-SRID=-?[0-9]+ { 
+SRID=-?[0-9]+ {
 	LWDEBUG(5,"SRID");
-	wkt_yylval.integervalue = wkt_lexer_read_srid(wkt_yytext); 
-	return SRID_TOK; 
+	wkt_yylval.integervalue = wkt_lexer_read_srid(wkt_yytext);
+	return SRID_TOK;
 	}
 
 GEOMETRYCOLLECTION { return COLLECTION_TOK; }
@@ -78,10 +78,10 @@ TIN { return TIN_TOK; }
 POINT { return POINT_TOK; }
 EMPTY { return EMPTY_TOK; }
 
-Z|M|ZM { 
+Z|M|ZM {
 	LWDEBUG(5,"DIMENSIONALITY");
 	wkt_yylval.stringvalue = wkt_yytext;
-	return DIMENSIONALITY_TOK; 
+	return DIMENSIONALITY_TOK;
 	}
 
 \( { LWDEBUG(5,"LBRACKET"); return LBRACKET_TOK; }
@@ -92,9 +92,9 @@ Z|M|ZM {
 [ \t\n\r]+ { /* ignore whitespace */ LWDEBUG(5,"WHITESPACE"); }
 
 . { /* Error out and stop parsing on unknown/unexpected characters */
-	LWDEBUG(5,"UNKNOWN"); 
+	LWDEBUG(5,"UNKNOWN");
 	wkt_lexer_unknown();
-	yyterminate(); 
+	yyterminate();
 	}
 
 %%
@@ -117,16 +117,17 @@ void wkt_yyfree (void * ptr )
 /*
 * Set up the lexer!
 */
-void wkt_lexer_init(char *src) 
-{ 
-	wkt_yy_buf_state = wkt_yy_scan_string(src); 
-} 
+void wkt_lexer_init(char *src)
+{
+	yy_init_globals();
+	wkt_yy_buf_state = wkt_yy_scan_string(src);
+}
 
 /*
 * Clean up the lexer!
 */
-void wkt_lexer_close() 
-{ 
-	wkt_yy_delete_buffer(wkt_yy_buf_state); 
-} 
+void wkt_lexer_close()
+{
+	wkt_yy_delete_buffer(wkt_yy_buf_state);
+}
 
-- 
2.40.0