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217b3ac0 AB |
1 | /** @file\r |
2 | Implementation of GUID functions for ARM and AARCH64\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>\r | |
9344f092 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
217b3ac0 AB |
7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include "MemLibInternals.h"\r | |
11 | \r | |
8e947c07 LG |
12 | /**\r |
13 | Internal function to compare two GUIDs.\r | |
14 | \r | |
15 | This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE is returned.\r | |
16 | If there are any bit differences in the two GUIDs, then FALSE is returned.\r | |
17 | \r | |
18 | @param Guid1 A pointer to a 128 bit GUID.\r | |
19 | @param Guid2 A pointer to a 128 bit GUID.\r | |
20 | \r | |
21 | @retval TRUE Guid1 and Guid2 are identical.\r | |
22 | @retval FALSE Guid1 and Guid2 are not identical.\r | |
23 | \r | |
24 | **/\r | |
217b3ac0 AB |
25 | BOOLEAN\r |
26 | EFIAPI\r | |
27 | InternalMemCompareGuid (\r | |
28 | IN CONST GUID *Guid1,\r | |
29 | IN CONST GUID *Guid2\r | |
30 | );\r | |
31 | \r | |
32 | /**\r | |
33 | Copies a source GUID to a destination GUID.\r | |
34 | \r | |
35 | This function copies the contents of the 128-bit GUID specified by SourceGuid to\r | |
36 | DestinationGuid, and returns DestinationGuid.\r | |
37 | \r | |
38 | If DestinationGuid is NULL, then ASSERT().\r | |
39 | If SourceGuid is NULL, then ASSERT().\r | |
40 | \r | |
41 | @param DestinationGuid The pointer to the destination GUID.\r | |
42 | @param SourceGuid The pointer to the source GUID.\r | |
43 | \r | |
44 | @return DestinationGuid.\r | |
45 | \r | |
46 | **/\r | |
47 | GUID *\r | |
48 | EFIAPI\r | |
49 | CopyGuid (\r | |
50 | OUT GUID *DestinationGuid,\r | |
51 | IN CONST GUID *SourceGuid\r | |
52 | )\r | |
53 | {\r | |
54 | ASSERT (DestinationGuid != NULL);\r | |
55 | ASSERT (SourceGuid != NULL);\r | |
56 | \r | |
57 | return InternalMemCopyMem (DestinationGuid, SourceGuid, sizeof (GUID));\r | |
58 | }\r | |
59 | \r | |
60 | /**\r | |
61 | Compares two GUIDs.\r | |
62 | \r | |
63 | This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE is returned.\r | |
64 | If there are any bit differences in the two GUIDs, then FALSE is returned.\r | |
65 | \r | |
66 | If Guid1 is NULL, then ASSERT().\r | |
67 | If Guid2 is NULL, then ASSERT().\r | |
68 | \r | |
69 | @param Guid1 A pointer to a 128 bit GUID.\r | |
70 | @param Guid2 A pointer to a 128 bit GUID.\r | |
71 | \r | |
72 | @retval TRUE Guid1 and Guid2 are identical.\r | |
73 | @retval FALSE Guid1 and Guid2 are not identical.\r | |
74 | \r | |
75 | **/\r | |
76 | BOOLEAN\r | |
77 | EFIAPI\r | |
78 | CompareGuid (\r | |
79 | IN CONST GUID *Guid1,\r | |
80 | IN CONST GUID *Guid2\r | |
81 | )\r | |
82 | {\r | |
83 | ASSERT (Guid1 != NULL);\r | |
84 | ASSERT (Guid2 != NULL);\r | |
85 | \r | |
86 | return InternalMemCompareGuid (Guid1, Guid2);\r | |
87 | }\r | |
88 | \r | |
89 | /**\r | |
90 | Scans a target buffer for a GUID, and returns a pointer to the matching GUID\r | |
91 | in the target buffer.\r | |
92 | \r | |
93 | This function searches the target buffer specified by Buffer and Length from\r | |
94 | the lowest address to the highest address at 128-bit increments for the 128-bit\r | |
95 | GUID value that matches Guid. If a match is found, then a pointer to the matching\r | |
96 | GUID in the target buffer is returned. If no match is found, then NULL is returned.\r | |
97 | If Length is 0, then NULL is returned.\r | |
98 | \r | |
99 | If Length > 0 and Buffer is NULL, then ASSERT().\r | |
100 | If Buffer is not aligned on a 32-bit boundary, then ASSERT().\r | |
101 | If Length is not aligned on a 128-bit boundary, then ASSERT().\r | |
102 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r | |
103 | \r | |
104 | @param Buffer The pointer to the target buffer to scan.\r | |
105 | @param Length The number of bytes in Buffer to scan.\r | |
106 | @param Guid The value to search for in the target buffer.\r | |
107 | \r | |
108 | @return A pointer to the matching Guid in the target buffer or NULL otherwise.\r | |
109 | \r | |
110 | **/\r | |
111 | VOID *\r | |
112 | EFIAPI\r | |
113 | ScanGuid (\r | |
114 | IN CONST VOID *Buffer,\r | |
115 | IN UINTN Length,\r | |
116 | IN CONST GUID *Guid\r | |
117 | )\r | |
118 | {\r | |
2f88bd3a | 119 | CONST GUID *GuidPtr;\r |
217b3ac0 AB |
120 | \r |
121 | ASSERT (((UINTN)Buffer & (sizeof (Guid->Data1) - 1)) == 0);\r | |
122 | ASSERT (Length <= (MAX_ADDRESS - (UINTN)Buffer + 1));\r | |
123 | ASSERT ((Length & (sizeof (*GuidPtr) - 1)) == 0);\r | |
124 | \r | |
2f88bd3a | 125 | GuidPtr = (GUID *)Buffer;\r |
217b3ac0 | 126 | Buffer = GuidPtr + Length / sizeof (*GuidPtr);\r |
2f88bd3a | 127 | while (GuidPtr < (CONST GUID *)Buffer) {\r |
217b3ac0 | 128 | if (InternalMemCompareGuid (GuidPtr, Guid)) {\r |
2f88bd3a | 129 | return (VOID *)GuidPtr;\r |
217b3ac0 | 130 | }\r |
2f88bd3a | 131 | \r |
217b3ac0 AB |
132 | GuidPtr++;\r |
133 | }\r | |
2f88bd3a | 134 | \r |
217b3ac0 AB |
135 | return NULL;\r |
136 | }\r | |
137 | \r | |
138 | /**\r | |
139 | Checks if the given GUID is a zero GUID.\r | |
140 | \r | |
141 | This function checks whether the given GUID is a zero GUID. If the GUID is\r | |
142 | identical to a zero GUID then TRUE is returned. Otherwise, FALSE is returned.\r | |
143 | \r | |
144 | If Guid is NULL, then ASSERT().\r | |
145 | \r | |
146 | @param Guid The pointer to a 128 bit GUID.\r | |
147 | \r | |
148 | @retval TRUE Guid is a zero GUID.\r | |
149 | @retval FALSE Guid is not a zero GUID.\r | |
150 | \r | |
151 | **/\r | |
152 | BOOLEAN\r | |
153 | EFIAPI\r | |
154 | IsZeroGuid (\r | |
155 | IN CONST GUID *Guid\r | |
156 | )\r | |
157 | {\r | |
158 | ASSERT (Guid != NULL);\r | |
159 | \r | |
160 | return InternalMemCompareGuid (Guid, NULL);\r | |
161 | }\r |