annotate nss/lib/util/secitem.h @ 4:b513267f632f tip

Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 #ifndef _SECITEM_H_
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6 #define _SECITEM_H_
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7
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8 #include "utilrename.h"
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9
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10 /*
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11 * secitem.h - public data structures and prototypes for handling
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12 * SECItems
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13 */
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14
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15 #include "plarena.h"
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16 #include "plhash.h"
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17 #include "seccomon.h"
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18
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19 SEC_BEGIN_PROTOS
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20
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21 /*
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22 ** Allocate an item. If "arena" is not NULL, then allocate from there,
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23 ** otherwise allocate from the heap. If "item" is not NULL, allocate
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24 ** only the data buffer for the item, not the item itself. If "len" is
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25 ** 0, do not allocate the data buffer for the item; simply set the data
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26 ** field to NULL and the len field to 0. The item structure is allocated
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27 ** zero-filled; the data buffer is not zeroed. The caller is responsible
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28 ** for initializing the type field of the item.
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29 **
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30 ** The resulting item is returned; NULL if any error occurs.
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31 **
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32 ** XXX This probably should take a SECItemType, but since that is mostly
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33 ** unused and our improved APIs (aka Stan) are looming, I left it out.
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34 */
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35 extern SECItem *SECITEM_AllocItem(PLArenaPool *arena, SECItem *item,
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36 unsigned int len);
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37
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38 /*
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39 ** This is a legacy function containing bugs. It doesn't update item->len,
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40 ** and it has other issues as described in bug 298649 and bug 298938.
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41 ** However, the function is kept unchanged for consumers that might depend
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42 ** on the broken behaviour. New code should call SECITEM_ReallocItemV2.
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43 **
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44 ** Reallocate the data for the specified "item". If "arena" is not NULL,
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45 ** then reallocate from there, otherwise reallocate from the heap.
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46 ** In the case where oldlen is 0, the data is allocated (not reallocated).
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47 ** In any case, "item" is expected to be a valid SECItem pointer;
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48 ** SECFailure is returned if it is not. If the allocation succeeds,
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49 ** SECSuccess is returned.
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50 */
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51 extern SECStatus SECITEM_ReallocItem( /* deprecated function */
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52 PLArenaPool *arena, SECItem *item,
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53 unsigned int oldlen, unsigned int newlen);
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54
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55 /*
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56 ** Reallocate the data for the specified "item". If "arena" is not NULL,
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57 ** then reallocate from there, otherwise reallocate from the heap.
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58 ** If item->data is NULL, the data is allocated (not reallocated).
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59 ** In any case, "item" is expected to be a valid SECItem pointer;
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60 ** SECFailure is returned if it is not, and the item will remain unchanged.
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61 ** If the allocation succeeds, the item is updated and SECSuccess is returned.
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62 */
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63 extern SECStatus SECITEM_ReallocItemV2(PLArenaPool *arena, SECItem *item,
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64 unsigned int newlen);
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65
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66 /*
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67 ** Compare two items returning the difference between them.
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68 */
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69 extern SECComparison SECITEM_CompareItem(const SECItem *a, const SECItem *b);
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70
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71 /*
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72 ** Compare two items -- if they are the same, return true; otherwise false.
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73 */
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74 extern PRBool SECITEM_ItemsAreEqual(const SECItem *a, const SECItem *b);
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75
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76 /*
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77 ** Copy "from" to "to"
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78 */
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79 extern SECStatus SECITEM_CopyItem(PLArenaPool *arena, SECItem *to,
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80 const SECItem *from);
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81
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82 /*
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83 ** Allocate an item and copy "from" into it.
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84 */
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85 extern SECItem *SECITEM_DupItem(const SECItem *from);
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86
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87 /*
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88 ** Allocate an item and copy "from" into it. The item itself and the
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89 ** data it points to are both allocated from the arena. If arena is
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90 ** NULL, this function is equivalent to SECITEM_DupItem.
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91 */
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92 extern SECItem *SECITEM_ArenaDupItem(PLArenaPool *arena, const SECItem *from);
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93
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94 /*
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95 ** Free "zap". If freeit is PR_TRUE then "zap" itself is freed.
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96 */
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97 extern void SECITEM_FreeItem(SECItem *zap, PRBool freeit);
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98
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99 /*
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100 ** Zero and then free "zap". If freeit is PR_TRUE then "zap" itself is freed.
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101 */
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102 extern void SECITEM_ZfreeItem(SECItem *zap, PRBool freeit);
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103
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104 PLHashNumber PR_CALLBACK SECITEM_Hash ( const void *key);
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105
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106 PRIntn PR_CALLBACK SECITEM_HashCompare ( const void *k1, const void *k2);
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107
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108 extern SECItemArray *SECITEM_AllocArray(PLArenaPool *arena,
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109 SECItemArray *array,
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110 unsigned int len);
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111 extern SECItemArray *SECITEM_DupArray(PLArenaPool *arena,
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112 const SECItemArray *from);
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113 extern void SECITEM_FreeArray(SECItemArray *array, PRBool freeit);
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114 extern void SECITEM_ZfreeArray(SECItemArray *array, PRBool freeit);
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115
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116 SEC_END_PROTOS
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117
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118 #endif /* _SECITEM_H_ */
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