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 }