sysdb: Implemented input scanner and simple command handling.

[sysdb.git] / src / tools / sysdb / scanner.l

diff --git a/src/tools/sysdb/scanner.l b/src/tools/sysdb/scanner.l
index 07a941370d9eb5f419674806544d9337f3f21f36..c9b527e7d9cdb74785f891b6ea99553ff478a9b3 100644 (file)
--- a/src/tools/sysdb/scanner.l
+++ b/src/tools/sysdb/scanner.l
@@ -33,13 +33,19 @@
  */
 
 #include "tools/sysdb/input.h"
+#include "tools/sysdb/command.h"
+
+#include <string.h>
 
 #ifdef YY_INPUT
 #      undef YY_INPUT
 #endif
 #define YY_INPUT(buf, result, max_size) \
+       sdb_input_readline(sdb_input, (buf), &(result), (max_size))
+
+#define APPEND() \
        do { \
-               sdb_input_readline(sdb_input, (buf), &(result), (max_size)); \
+               sdb_input->query_len += strlen(yytext); \
        } while (0)
 
 static sdb_input_t *sdb_input;
@@ -54,9 +60,39 @@ static sdb_input_t *sdb_input;
 %option verbose
 %option warn
 
+%x CSC
+
+whitespace             ([ \t\n\r\f]+)
+simple_comment ("--"[^\n\r]*)
+
+/*
+ * C style comments
+ */
+csc_start      \/\*
+csc_inside     ([^*/]+|[^*]\/|\*[^/])
+csc_end                \*\/
+
+identifier     ([A-Za-z_][A-Za-z_0-9$]*)
+
 %%
 
-. { /* do nothing */ }
+{whitespace}           { APPEND(); }
+{simple_comment}       { APPEND(); }
+
+{csc_start}                    { APPEND(); BEGIN(CSC); }
+<CSC>{csc_inside}      { APPEND(); }
+<CSC>{csc_end}         { APPEND(); BEGIN(INITIAL); }
+<CSC><<EOF>>           { return -1; }
+
+{identifier}           { APPEND(); }
+
+       /*
+        * The following rules are specific to the command line tool.
+        */
+
+";"    { APPEND(); sdb_command_exec(sdb_input); }
+
+.      { APPEND(); }
 
 %%