Add support for "full" star globbing patterns in event names and filters

[lttng-tools.git] / src / lib / lttng-ctl / filter / filter-visitor-ir-normalize-glob-patterns.c

diff --git a/src/lib/lttng-ctl/filter/filter-visitor-ir-normalize-glob-patterns.c b/src/lib/lttng-ctl/filter/filter-visitor-ir-normalize-glob-patterns.c
new file mode 100644 (file)
index 0000000..3b10695
--- /dev/null
+++ b/src/lib/lttng-ctl/filter/filter-visitor-ir-normalize-glob-patterns.c
@@ -0,0 +1,94 @@
+/*
+ * filter-visitor-ir-normalize-glob-patterns.c
+ *
+ * LTTng filter IR normalize string
+ *
+ * Copyright 2017 - Philippe Proulx <pproulx@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#include <common/macros.h>
+#include <common/string-utils/string-utils.h>
+
+#include "filter-ast.h"
+#include "filter-parser.h"
+#include "filter-ir.h"
+
+static
+int normalize_glob_patterns(struct ir_op *node)
+{
+       switch (node->op) {
+       case IR_OP_UNKNOWN:
+       default:
+               fprintf(stderr, "[error] %s: unknown op type\n", __func__);
+               return -EINVAL;
+
+       case IR_OP_ROOT:
+               return normalize_glob_patterns(node->u.root.child);
+       case IR_OP_LOAD:
+       {
+               if (node->data_type == IR_DATA_STRING) {
+                       enum ir_load_string_type type =
+                               node->u.load.u.string.type;
+                       if (type == IR_LOAD_STRING_TYPE_GLOB_STAR_END ||
+                                       type == IR_LOAD_STRING_TYPE_GLOB_STAR) {
+                               assert(node->u.load.u.string.value);
+                               strutils_normalize_star_glob_pattern(
+                                       node->u.load.u.string.value);
+                       }
+               }
+
+               return 0;
+       }
+       case IR_OP_UNARY:
+               return normalize_glob_patterns(node->u.unary.child);
+       case IR_OP_BINARY:
+       {
+               int ret = normalize_glob_patterns(node->u.binary.left);
+
+               if (ret)
+                       return ret;
+               return normalize_glob_patterns(node->u.binary.right);
+       }
+       case IR_OP_LOGICAL:
+       {
+               int ret;
+
+               ret = normalize_glob_patterns(node->u.logical.left);
+               if (ret)
+                       return ret;
+               return normalize_glob_patterns(node->u.logical.right);
+       }
+       }
+}
+
+/*
+ * This function normalizes all the globbing literal strings with
+ * utils_normalize_glob_pattern(). See the documentation of
+ * utils_normalize_glob_pattern() for more details.
+ */
+LTTNG_HIDDEN
+int filter_visitor_ir_normalize_glob_patterns(struct filter_parser_ctx *ctx)
+{
+       return normalize_glob_patterns(ctx->ir_root);
+}