From de547e4ec4e375531ac3d797c3e82ff2544f9464 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Sun, 7 Jun 2015 20:04:18 -0700
Subject: * match.c (v_load): Call parse_once rater than parse.

* parser.c (regex_parse): Likewise.

* txr.c (txr_main): Likewise.

* parser.h (parse): Declaration updated.
(parse_once): Declared.

* parser.y (parse_once): New function, same as old parse implementation.
(parse): Becomes one argument function which works with a previously
initialized parser and continues the parse.
---
 ChangeLog | 15 +++++++++++++++
 match.c   |  2 +-
 parser.c  |  4 ++--
 parser.h  |  3 ++-
 parser.y  | 22 +++++++++++++++++++++-
 txr.c     |  2 +-
 6 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 466eadab..6ca77fc3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Call parse_once rater than parse.
+
+	* parser.c (regex_parse, lisp_parse): Likewise.
+
+	* txr.c (txr_main): Likewise.
+
+	* parser.h (parse): Declaration updated.
+	(parse_once): Declared.
+
+	* parser.y (parse_once): New function, same as old parse implementation.
+	(parse): Becomes one argument function which works with a previously
+	initialized parser and continues the parse.
+
 2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
 
 	* stream.c (catenated_stream_p, catenated_stream_push): New functions.
diff --git a/match.c b/match.c
index 562e1dfd..b6d4163b 100644
--- a/match.c
+++ b/match.c
@@ -3725,7 +3725,7 @@ static val v_load(match_files_ctx *c)
     parser_t parser;
 
     open_txr_file(path, &name, &stream);
-    parse(stream, name, &parser);
+    parse_once(stream, name, &parser);
     gc_state(gc);
 
     if (parser.errors)
diff --git a/parser.c b/parser.c
index 4bed7be9..4b92cffe 100644
--- a/parser.c
+++ b/parser.c
@@ -111,7 +111,7 @@ val regex_parse(val string, val error_stream)
   {
     int gc = gc_state(0);
     val name = if3(std_error != std_null, lit("regex"), lit(""));
-    parse(stream, name, &parser);
+    parse_once(stream, name, &parser);
     gc_state(gc);
   }
   std_error = save_stream;
@@ -145,7 +145,7 @@ val lisp_parse(val source_in, val error_stream, val error_return_val, val name_i
   {
     int gc = gc_state(0);
     name = if3(std_error != std_null, name, lit(""));
-    parse(stream, name, &parser);
+    parse_once(stream, name, &parser);
     gc_state(gc);
   }
 
diff --git a/parser.h b/parser.h
index 01e927fe..e1de30b2 100644
--- a/parser.h
+++ b/parser.h
@@ -56,7 +56,8 @@ parser_t *yyget_extra(yyscan_t scanner);
 void yyset_extra(parser_t *, yyscan_t);
 void parser_l_init(void);
 void open_txr_file(val spec_file, val *name, val *stream);
-int parse(val stream, val name, parser_t *parser);
+int parse_once(val stream, val name, parser_t *parser);
+int parse(parser_t *parser);
 val source_loc(val form);
 val source_loc_str(val form);
 val rlset(val form, val info);
diff --git a/parser.y b/parser.y
index d95b3ed5..ceb1801b 100644
--- a/parser.y
+++ b/parser.y
@@ -1428,7 +1428,7 @@ void yybadtoken(parser_t *parser, int tok, val context)
         yyerrorf(scnr, lit("unexpected ~s"), chr(tok), nao);
 }
 
-int parse(val stream, val name, parser_t *parser)
+int parse_once(val stream, val name, parser_t *parser)
 {
   int res;
   yyscan_t scanner;
@@ -1450,3 +1450,23 @@ int parse(val stream, val name, parser_t *parser)
 
   return res;
 }
+
+int parse(parser_t *parser)
+{
+  int res;
+  yyscan_t scanner;
+
+  parser->errors = 0;
+  parser->prepared_msg = nil;
+  parser->syntax_tree = nil;
+  yylex_init(&scanner);
+  parser->scanner = convert(scanner_t *, scanner);
+
+  yyset_extra(parser, parser->scanner);
+
+  res = yyparse(parser->scanner, parser);
+
+  yylex_destroy(parser->scanner);
+
+  return res;
+}
diff --git a/txr.c b/txr.c
index 03b11a89..2ba3cc40 100644
--- a/txr.c
+++ b/txr.c
@@ -665,7 +665,7 @@ int txr_main(int argc, char **argv)
   {
     int gc = gc_state(0);
     parser_t parser;
-    parse(parse_stream, spec_file_str, &parser);
+    parse_once(parse_stream, spec_file_str, &parser);
     gc_state(gc);
 
     if (parser.errors)
-- 
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