formats/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 #include <string.h>
  30 #include <stdlib.h>
  31 #include <glib.h>
  32
  33 static
  34 const char * const reserved_keywords_str[] = {"align", "callsite",
  35         "const", "char", "clock", "double", "enum", "env", "event",
  36         "floating_point", "float", "integer", "int", "long", "short", "signed",
  37         "stream", "string", "struct", "trace", "typealias", "typedef",
  38         "unsigned", "variant", "void" "_Bool", "_Complex", "_Imaginary"};
  39
  40 static GHashTable *reserved_keywords_set;
  41 static int init_done;
  42 static int global_data_refcount;
  43
  44 static __attribute__((constructor))
  45 void trace_init(void)
  46 {
  47         size_t i;
  48         const size_t reserved_keywords_count =
  49                 sizeof(reserved_keywords_str) / sizeof(char *);
  50
  51         global_data_refcount++;
  52         if (init_done) {
  53                 return;
  54         }
  55
  56         reserved_keywords_set = g_hash_table_new(g_direct_hash, g_direct_equal);
  57         for (i = 0; i < reserved_keywords_count; i++) {
  58                 gpointer quark = GINT_TO_POINTER(g_quark_from_string(
  59                         reserved_keywords_str[i]));
  60
  61                 g_hash_table_insert(reserved_keywords_set, quark, quark);
  62         }
  63
  64         init_done = 1;
  65 }
  66
  67 static __attribute__((destructor))
  68 void trace_finalize(void)
  69 {
  70         if (--global_data_refcount == 0) {
  71                 g_hash_table_destroy(reserved_keywords_set);
  72         }
  73 }
  74
  75 int bt_ctf_validate_identifier(const char *input_string)
  76 {
  77         int ret = 0;
  78         char *string = NULL;
  79         char *save_ptr, *token;
  80
  81         if (!input_string || input_string[0] == '\0') {
  82                 ret = -1;
  83                 goto end;
  84         }
  85
  86         string = strdup(input_string);
  87         if (!string) {
  88                 ret = -1;
  89                 goto end;
  90         }
  91
  92         token = strtok_r(string, " ", &save_ptr);
  93         while (token) {
  94                 if (g_hash_table_lookup_extended(reserved_keywords_set,
  95                         GINT_TO_POINTER(g_quark_from_string(token)),
  96                         NULL, NULL)) {
  97                         ret = -1;
  98                         goto end;
  99                 }
 100
 101                 token = strtok_r(NULL, " ", &save_ptr);
 102         }
 103 end:
 104         free(string);
 105         return ret;
 106 }