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 <assert.h>
  33 #include <stdlib.h>
  34 #include <glib.h>
  35 #include <babeltrace/ctf-ir/utils.h>
  36
  37 static
  38 const char * const reserved_keywords_str[] = {"align", "callsite",
  39         "const", "char", "clock", "double", "enum", "env", "event",
  40         "floating_point", "float", "integer", "int", "long", "short", "signed",
  41         "stream", "string", "struct", "trace", "typealias", "typedef",
  42         "unsigned", "variant", "void" "_Bool", "_Complex", "_Imaginary"};
  43
  44 static GHashTable *reserved_keywords_set;
  45 static int init_done;
  46
  47 static
  48 void try_init_reserved_keywords(void)
  49 {
  50         size_t i;
  51         const size_t reserved_keywords_count =
  52                 sizeof(reserved_keywords_str) / sizeof(char *);
  53
  54         if (reserved_keywords_set) {
  55                 return;
  56         }
  57
  58         reserved_keywords_set = g_hash_table_new(g_direct_hash, g_direct_equal);
  59         assert(reserved_keywords_set);
  60
  61         for (i = 0; i < reserved_keywords_count; i++) {
  62                 gpointer quark = GINT_TO_POINTER(g_quark_from_string(
  63                         reserved_keywords_str[i]));
  64
  65                 g_hash_table_insert(reserved_keywords_set, quark, quark);
  66         }
  67
  68         init_done = 1;
  69 }
  70
  71 static __attribute__((destructor))
  72 void trace_finalize(void)
  73 {
  74         if (reserved_keywords_set) {
  75                 g_hash_table_destroy(reserved_keywords_set);
  76         }
  77 }
  78
  79 int bt_validate_identifier(const char *input_string)
  80 {
  81         int ret = 0;
  82         char *string = NULL;
  83         char *save_ptr, *token;
  84
  85         if (!input_string) {
  86                 BT_LOGV_STR("Invalid parameter: input string is NULL.");
  87                 ret = -1;
  88                 goto end;
  89         }
  90
  91         try_init_reserved_keywords();
  92
  93         if (input_string[0] == '\0') {
  94                 ret = -1;
  95                 goto end;
  96         }
  97
  98         string = strdup(input_string);
  99         if (!string) {
 100                 BT_LOGE("strdup() failed.");
 101                 ret = -1;
 102                 goto end;
 103         }
 104
 105         token = strtok_r(string, " ", &save_ptr);
 106         while (token) {
 107                 if (g_hash_table_lookup_extended(reserved_keywords_set,
 108                         GINT_TO_POINTER(g_quark_from_string(token)),
 109                         NULL, NULL)) {
 110                         ret = -1;
 111                         goto end;
 112                 }
 113
 114                 token = strtok_r(NULL, " ", &save_ptr);
 115         }
 116 end:
 117         free(string);
 118         return ret;
 119 }
 120
 121 bt_bool bt_identifier_is_valid(const char *identifier)
 122 {
 123         return bt_validate_identifier(identifier);
 124 }