lib/ctf-ir/utils.c

   1 /*
   2  * utils.c
   3  *
   4  * Babeltrace CTF IR - Utilities
   5  *
   6  * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #define BT_LOG_TAG "CTF-IR-UTILS"
  30 #include <babeltrace/lib-logging-internal.h>
  31
  32 #include <stdlib.h>
  33 #include <glib.h>
  34 #include <babeltrace/ctf-ir/utils.h>
  35 #include <babeltrace/ctf-ir/field-types-internal.h>
  36 #include <babeltrace/ctf-ir/clock-class.h>
  37 #include <babeltrace/ref.h>
  38 #include <babeltrace/assert-internal.h>
  39
  40 static
  41 const char * const reserved_keywords_str[] = {"align", "callsite",
  42         "const", "char", "clock", "double", "enum", "env", "event",
  43         "floating_point", "float", "integer", "int", "long", "short", "signed",
  44         "stream", "string", "struct", "trace", "typealias", "typedef",
  45         "unsigned", "variant", "void" "_Bool", "_Complex", "_Imaginary"};
  46
  47 static GHashTable *reserved_keywords_set;
  48 static int init_done;
  49
  50 static
  51 void try_init_reserved_keywords(void)
  52 {
  53         size_t i;
  54         const size_t reserved_keywords_count =
  55                 sizeof(reserved_keywords_str) / sizeof(char *);
  56
  57         if (reserved_keywords_set) {
  58                 return;
  59         }
  60
  61         reserved_keywords_set = g_hash_table_new(g_direct_hash, g_direct_equal);
  62         BT_ASSERT(reserved_keywords_set);
  63
  64         for (i = 0; i < reserved_keywords_count; i++) {
  65                 gpointer quark = GINT_TO_POINTER(g_quark_from_string(
  66                         reserved_keywords_str[i]));
  67
  68                 g_hash_table_insert(reserved_keywords_set, quark, quark);
  69         }
  70
  71         init_done = 1;
  72 }
  73
  74 static __attribute__((destructor))
  75 void trace_finalize(void)
  76 {
  77         if (reserved_keywords_set) {
  78                 g_hash_table_destroy(reserved_keywords_set);
  79         }
  80 }
  81
  82 bt_bool bt_identifier_is_valid(const char *identifier)
  83 {
  84         bt_bool is_valid = BT_TRUE;
  85         char *string = NULL;
  86         char *save_ptr, *token;
  87
  88         if (!identifier) {
  89                 BT_LOGV_STR("Invalid parameter: input string is NULL.");
  90                 is_valid = BT_FALSE;
  91                 goto end;
  92         }
  93
  94         try_init_reserved_keywords();
  95
  96         if (identifier[0] == '\0') {
  97                 is_valid = BT_FALSE;
  98                 goto end;
  99         }
 100
 101         string = strdup(identifier);
 102         if (!string) {
 103                 BT_LOGE("strdup() failed.");
 104                 is_valid = BT_FALSE;
 105                 goto end;
 106         }
 107
 108         token = strtok_r(string, " ", &save_ptr);
 109         while (token) {
 110                 if (g_hash_table_lookup_extended(reserved_keywords_set,
 111                         GINT_TO_POINTER(g_quark_from_string(token)),
 112                         NULL, NULL)) {
 113                         is_valid = BT_FALSE;
 114                         goto end;
 115                 }
 116
 117                 token = strtok_r(NULL, " ", &save_ptr);
 118         }
 119 end:
 120         free(string);
 121         return is_valid;
 122 }