From b5c0396e79bf2c0fbd03e96ca0654a4545cbf936 Mon Sep 17 00:00:00 2001
From: Sebastian Harl <sh@tokkee.org>
Date: Mon, 31 Mar 2014 23:35:23 +0200
Subject: [PATCH] frontend: Added very simple single-quoted string support.

No escape sequences whatsoever are supported so far but except for that any
single-quoted strings which do not contain single quotes, can be used.

FETCH now supports host names specified as strings as well.
---
 src/frontend/grammar.y | 12 +++++++++++-
 src/frontend/scanner.l |  7 +++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/frontend/grammar.y b/src/frontend/grammar.y
index 4f7a891..c3ee0af 100644
--- a/src/frontend/grammar.y
+++ b/src/frontend/grammar.y
@@ -75,7 +75,7 @@ sdb_fe_yyerror(YYLTYPE *lval, sdb_fe_yyscan_t scanner, const char *msg);
 
 %token SCANNER_ERROR
 
-%token <str> IDENTIFIER
+%token <str> IDENTIFIER STRING
 %token <node> FETCH LIST
 
 %type <list> statements
@@ -157,6 +157,16 @@ fetch_statement:
 			free($2);
 			$2 = NULL;
 		}
+	|
+	FETCH STRING
+		{
+			$$ = SDB_CONN_NODE(sdb_object_create_dT(/* name = */ NULL,
+						conn_fetch_t, conn_fetch_destroy));
+			CONN_FETCH($$)->name = strdup($2);
+			$$->cmd = CONNECTION_FETCH;
+			free($2);
+			$2 = NULL;
+		}
 	;
 
 list_statement:
diff --git a/src/frontend/scanner.l b/src/frontend/scanner.l
index c279a48..c0d167c 100644
--- a/src/frontend/scanner.l
+++ b/src/frontend/scanner.l
@@ -74,6 +74,8 @@ csc_inside	([^*/]+|[^*]\/|\*[^/])
 csc_end		\*\/
 
 identifier	([A-Za-z_][A-Za-z_0-9$]*)
+/* TODO: fully support SQL strings */
+string		('[^']*')
 
 %%
 
@@ -98,6 +100,11 @@ identifier	([A-Za-z_][A-Za-z_0-9$]*)
 		yylval->str = strdup(yytext);
 		return IDENTIFIER;
 	}
+{string} {
+		yytext[yyleng - 1] = '\0';
+		yylval->str = strdup(yytext + 1);
+		return STRING;
+	}
 
 .	{ /* do nothing for now */ }
 
-- 
2.30.2