1 /*
   2  * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   - Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *
  11  *   - Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *
  15  *   - Neither the name of Oracle nor the names of its
  16  *     contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 
  32 /*
  33  * This source code is provided to illustrate the usage of a given feature
  34  * or technique and has been deliberately simplified. Additional steps
  35  * required for a production-quality application, such as security checks,
  36  * input validation and proper error handling, might not be present in
  37  * this sample code.
  38  */
  39 
  40 
  41 /* Table of byte arrays (e.g. char* string + NULL byte) */
  42 
  43 /*
  44  * Strings are unique by their own contents, since the string itself
  45  *   is the Key, and the hprof_table.c guarantees that keys don't move,
  46  *   this works out perfect. Any key in this table can be used as
  47  *   an char*.
  48  *
  49  * This does mean that this table has dynamically sized keys.
  50  *
  51  * Care needs to be taken to make sure the NULL byte is included, not for
  52  *   the sake of hprof_table.c, but so that the key can be used as a char*.
  53  *
  54  */
  55 
  56 #include "hprof.h"
  57 
  58 void
  59 string_init(void)
  60 {
  61     HPROF_ASSERT(gdata->string_table==NULL);
  62     gdata->string_table = table_initialize("Strings", 4096, 4096, 1024, 0);
  63 }
  64 
  65 StringIndex
  66 string_find_or_create(const char *str)
  67 {
  68     return table_find_or_create_entry(gdata->string_table,
  69                 (void*)str, (int)strlen(str)+1, NULL, NULL);
  70 }
  71 
  72 static void
  73 list_item(TableIndex index, void *str, int len, void *info_ptr, void *arg)
  74 {
  75     debug_message( "0x%08x: String \"%s\"\n", index, (const char *)str);
  76 }
  77 
  78 void
  79 string_list(void)
  80 {
  81     debug_message(
  82         "-------------------- String Table ------------------------\n");
  83     table_walk_items(gdata->string_table, &list_item, NULL);
  84     debug_message(
  85         "----------------------------------------------------------\n");
  86 }
  87 
  88 void
  89 string_cleanup(void)
  90 {
  91     table_cleanup(gdata->string_table, NULL, NULL);
  92     gdata->string_table = NULL;
  93 }
  94 
  95 char *
  96 string_get(StringIndex index)
  97 {
  98     void *key;
  99     int   key_len;
 100 
 101     table_get_key(gdata->string_table, index, &key, &key_len);
 102     HPROF_ASSERT(key_len>0);
 103     return (char*)key;
 104 }
 105 
 106 int
 107 string_get_len(StringIndex index)
 108 {
 109     void *key;
 110     int   key_len;
 111 
 112     table_get_key(gdata->string_table, index, &key, &key_len);
 113     HPROF_ASSERT(key_len>0);
 114     return key_len-1;
 115 }