Add utility function to validate CTF identifiers

[babeltrace.git] / formats / ctf / ir / utils.c

diff --git a/formats/ctf/ir/utils.c b/formats/ctf/ir/utils.c
new file mode 100644 (file)
index 0000000..318b12d
--- /dev/null
+++ b/formats/ctf/ir/utils.c
@@ -0,0 +1,106 @@
+/*
+ * utils.c
+ *
+ * Babeltrace CTF IR - Utilities
+ *
+ * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <glib.h>
+
+static
+const char * const reserved_keywords_str[] = {"align", "callsite",
+       "const", "char", "clock", "double", "enum", "env", "event",
+       "floating_point", "float", "integer", "int", "long", "short", "signed",
+       "stream", "string", "struct", "trace", "typealias", "typedef",
+       "unsigned", "variant", "void" "_Bool", "_Complex", "_Imaginary"};
+
+static GHashTable *reserved_keywords_set;
+static int init_done;
+static int global_data_refcount;
+
+static __attribute__((constructor))
+void trace_init(void)
+{
+       size_t i;
+       const size_t reserved_keywords_count =
+               sizeof(reserved_keywords_str) / sizeof(char *);
+
+       global_data_refcount++;
+       if (init_done) {
+               return;
+       }
+
+       reserved_keywords_set = g_hash_table_new(g_direct_hash, g_direct_equal);
+       for (i = 0; i < reserved_keywords_count; i++) {
+               gpointer quark = GINT_TO_POINTER(g_quark_from_string(
+                       reserved_keywords_str[i]));
+
+               g_hash_table_insert(reserved_keywords_set, quark, quark);
+       }
+
+       init_done = 1;
+}
+
+static __attribute__((destructor))
+void trace_finalize(void)
+{
+       if (--global_data_refcount == 0) {
+               g_hash_table_destroy(reserved_keywords_set);
+       }
+}
+
+int bt_ctf_validate_identifier(const char *input_string)
+{
+       int ret = 0;
+       char *string = NULL;
+       char *save_ptr, *token;
+
+       if (!input_string || input_string[0] == '\0') {
+               ret = -1;
+               goto end;
+       }
+
+       string = strdup(input_string);
+       if (!string) {
+               ret = -1;
+               goto end;
+       }
+
+       token = strtok_r(string, " ", &save_ptr);
+       while (token) {
+               if (g_hash_table_lookup_extended(reserved_keywords_set,
+                       GINT_TO_POINTER(g_quark_from_string(token)),
+                       NULL, NULL)) {
+                       ret = -1;
+                       goto end;
+               }
+
+               token = strtok_r(NULL, " ", &save_ptr);
+       }
+end:
+       free(string);
+       return ret;
+}