From 81e2ec4d4c1f5818b69f49f615256a54c9f499ee Mon Sep 17 00:00:00 2001
From: Magnus Hagander <magnus@hagander.net>
Date: Fri, 4 Apr 2008 11:47:19 +0000
Subject: [PATCH] Convert backslash_quote guc to use enum.

---
 src/backend/utils/misc/guc.c   | 37 ++++++++++++++++++++++++----------
 src/include/parser/gramparse.h |  2 +-
 2 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 83a2fbdb0c..45a3b05fdb 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -153,7 +153,6 @@ static bool assign_stage_log_stats(bool newval, bool doit, GucSource source);
 static bool assign_log_stats(bool newval, bool doit, GucSource source);
 static bool assign_transaction_read_only(bool newval, bool doit, GucSource source);
 static const char *assign_canonical_path(const char *newval, bool doit, GucSource source);
-static const char *assign_backslash_quote(const char *newval, bool doit, GucSource source);
 static const char *assign_timezone_abbreviations(const char *newval, bool doit, GucSource source);
 static const char *show_archive_command(void);
 static bool assign_tcp_keepalives_idle(int newval, bool doit, GucSource source);
@@ -253,6 +252,23 @@ static const struct config_enum_entry xmloption_options[] = {
 	{NULL, 0}
 };
 
+/*
+ * Although only "on", "off", and "safe_encoding" are documented, we
+ * accept all the likely variants of "on" and "off".
+ */
+static const struct config_enum_entry backslash_quote_options[] = {
+	{"safe_encoding", BACKSLASH_QUOTE_SAFE_ENCODING},
+	{"on", BACKSLASH_QUOTE_ON},
+	{"off", BACKSLASH_QUOTE_OFF},
+	{"true", BACKSLASH_QUOTE_ON},
+	{"false", BACKSLASH_QUOTE_OFF},
+	{"yes", BACKSLASH_QUOTE_ON},
+	{"no", BACKSLASH_QUOTE_OFF},
+	{"1", BACKSLASH_QUOTE_ON},
+	{"0", BACKSLASH_QUOTE_OFF},
+	{NULL, 0}
+};
+
 /*
  * GUC option variables that are exported from this module
  */
@@ -311,7 +327,6 @@ static char *syslog_ident_str;
 static bool phony_autocommit;
 static bool session_auth_is_superuser;
 static double phony_random_seed;
-static char *backslash_quote_string;
 static char *client_encoding_string;
 static char *datestyle_string;
 static char *locale_collate;
@@ -1959,15 +1974,6 @@ static struct config_string ConfigureNamesString[] =
 		"", NULL, show_archive_command
 	},
 
-	{
-		{"backslash_quote", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
-			gettext_noop("Sets whether \"\\'\" is allowed in string literals."),
-			gettext_noop("Valid values are ON, OFF, and SAFE_ENCODING.")
-		},
-		&backslash_quote_string,
-		"safe_encoding", assign_backslash_quote, NULL
-	},
-
 	{
 		{"client_encoding", PGC_USERSET, CLIENT_CONN_LOCALE,
 			gettext_noop("Sets the client's character set encoding."),
@@ -2419,6 +2425,15 @@ static struct config_string ConfigureNamesString[] =
 
 static struct config_enum ConfigureNamesEnum[] =
 {
+	{
+		{"backslash_quote", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
+			gettext_noop("Sets whether \"\\'\" is allowed in string literals."),
+			gettext_noop("Valid values are ON, OFF, and SAFE_ENCODING.")
+		},
+		&backslash_quote,
+		BACKSLASH_QUOTE_SAFE_ENCODING, backslash_quote_options, NULL, NULL
+	},
+
 	{
 		{"client_min_messages", PGC_USERSET, LOGGING_WHEN,
 			gettext_noop("Sets the message levels that are sent to the client."),
diff --git a/src/include/parser/gramparse.h b/src/include/parser/gramparse.h
index 32aaf1be57..a96c7535f5 100644
--- a/src/include/parser/gramparse.h
+++ b/src/include/parser/gramparse.h
@@ -35,7 +35,7 @@ typedef enum
 } BackslashQuoteType;
 
 /* GUC variables in scan.l (every one of these is a bad idea :-() */
-extern BackslashQuoteType backslash_quote;
+extern int backslash_quote;
 extern bool escape_string_warning;
 extern bool standard_conforming_strings;
 
-- 
2.39.5