Renamed CONNECTION_* constants to SDB_CONNECTION_*.

[sysdb.git] / src / frontend / parser.c

diff --git a/src/frontend/parser.c b/src/frontend/parser.c
index 037550fbddd731bf4bd84c51c8d126d50466ff16..c82a514a00e7ddb4831805dafbbed8c9c618888e 100644 (file)
--- a/src/frontend/parser.c
+++ b/src/frontend/parser.c
@@ -31,33 +31,99 @@
 #include "frontend/parser.h"
 #include "frontend/grammar.h"
 
+#include "core/store.h"
+
 #include "utils/llist.h"
+#include "utils/strbuf.h"
 
+#include <assert.h>
 #include <string.h>
 
+/*
+ * private helper functions
+ */
+
+static int
+scanner_init(const char *input, int len,
+               sdb_fe_yyscan_t *scanner, sdb_fe_yyextra_t *extra,
+               sdb_strbuf_t *errbuf)
+{
+       if (! input) {
+               sdb_strbuf_sprintf(errbuf, "Missing scanner input");
+               return -1;
+       }
+
+       memset(extra, 0, sizeof(*extra));
+       extra->parsetree = sdb_llist_create();
+       extra->mode = SDB_PARSE_DEFAULT;
+       extra->errbuf = errbuf;
+
+       if (! extra->parsetree) {
+               sdb_strbuf_sprintf(errbuf, "Failed to allocate parse-tree");
+               return -1;
+       }
+
+       *scanner = sdb_fe_scanner_init(input, len, extra);
+       if (! scanner) {
+               sdb_llist_destroy(extra->parsetree);
+               return -1;
+       }
+       return 0;
+} /* scanner_init */
+
 /*
  * public API
  */
 
 sdb_llist_t *
-sdb_fe_parse(const char *query)
+sdb_fe_parse(const char *query, int len, sdb_strbuf_t *errbuf)
 {
        sdb_fe_yyscan_t scanner;
        sdb_fe_yyextra_t yyextra;
+       sdb_llist_iter_t *iter;
        int yyres;
 
-       if (! query)
+       if (scanner_init(query, len, &scanner, &yyextra, errbuf))
                return NULL;
 
-       memset(&yyextra, 0, sizeof(yyextra));
-       yyextra.parsetree = sdb_llist_create();
+       yyres = sdb_fe_yyparse(scanner);
+       sdb_fe_scanner_destroy(scanner);
 
-       scanner = sdb_fe_scanner_init(query, &yyextra);
-       if (! scanner) {
+       if (yyres) {
                sdb_llist_destroy(yyextra.parsetree);
                return NULL;
        }
 
+       iter = sdb_llist_get_iter(yyextra.parsetree);
+       while (sdb_llist_iter_has_next(iter)) {
+               sdb_conn_node_t *node;
+               node = SDB_CONN_NODE(sdb_llist_iter_get_next(iter));
+               if (sdb_fe_analyze(node, errbuf)) {
+                       sdb_llist_iter_destroy(iter);
+                       sdb_llist_destroy(yyextra.parsetree);
+                       return NULL;
+               }
+       }
+       sdb_llist_iter_destroy(iter);
+       return yyextra.parsetree;
+} /* sdb_fe_parse */
+
+sdb_store_matcher_t *
+sdb_fe_parse_matcher(const char *cond, int len, sdb_strbuf_t *errbuf)
+{
+       sdb_fe_yyscan_t scanner;
+       sdb_fe_yyextra_t yyextra;
+
+       sdb_conn_node_t *node;
+       sdb_store_matcher_t *m;
+
+       int yyres;
+
+       if (scanner_init(cond, len, &scanner, &yyextra, errbuf))
+               return NULL;
+
+       yyextra.mode = SDB_PARSE_COND;
+
        yyres = sdb_fe_yyparse(scanner);
        sdb_fe_scanner_destroy(scanner);
 
@@ -65,8 +131,62 @@ sdb_fe_parse(const char *query)
                sdb_llist_destroy(yyextra.parsetree);
                return NULL;
        }
-       return yyextra.parsetree;
-} /* sdb_fe_parse */
+
+       node = SDB_CONN_NODE(sdb_llist_get(yyextra.parsetree, 0));
+       if (! node) {
+               sdb_strbuf_sprintf(errbuf, "Empty matcher expression '%s'", cond);
+               sdb_llist_destroy(yyextra.parsetree);
+               return NULL;
+       }
+
+       assert(node->cmd == SDB_CONNECTION_MATCHER);
+       m = CONN_MATCHER(node)->matcher;
+       CONN_MATCHER(node)->matcher = NULL;
+
+       sdb_llist_destroy(yyextra.parsetree);
+       sdb_object_deref(SDB_OBJ(node));
+       return m;
+} /* sdb_fe_parse_matcher */
+
+sdb_store_expr_t *
+sdb_fe_parse_expr(const char *expr, int len, sdb_strbuf_t *errbuf)
+{
+       sdb_fe_yyscan_t scanner;
+       sdb_fe_yyextra_t yyextra;
+
+       sdb_conn_node_t *node;
+       sdb_store_expr_t *e;
+
+       int yyres;
+
+       if (scanner_init(expr, len, &scanner, &yyextra, errbuf))
+               return NULL;
+
+       yyextra.mode = SDB_PARSE_EXPR;
+
+       yyres = sdb_fe_yyparse(scanner);
+       sdb_fe_scanner_destroy(scanner);
+
+       if (yyres) {
+               sdb_llist_destroy(yyextra.parsetree);
+               return NULL;
+       }
+
+       node = SDB_CONN_NODE(sdb_llist_get(yyextra.parsetree, 0));
+       if (! node) {
+               sdb_strbuf_sprintf(errbuf, "Empty expression '%s'", expr);
+               sdb_llist_destroy(yyextra.parsetree);
+               return NULL;
+       }
+
+       assert(node->cmd == SDB_CONNECTION_EXPR);
+       e = CONN_EXPR(node)->expr;
+       CONN_EXPR(node)->expr = NULL;
+
+       sdb_llist_destroy(yyextra.parsetree);
+       sdb_object_deref(SDB_OBJ(node));
+       return e;
+} /* sdb_fe_parse_expr */
 
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */