Cc: Michael D Kinney <michael.d.kin...@intel.com> Cc: Liming Gao <liming....@intel.com> Cc: Jiewen Yao <jiewen....@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu <hao.a...@intel.com> --- MdePkg/Include/Library/BaseMemoryLib.h | 23 ++++++++ MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf | 1 + MdePkg/Library/BaseMemoryLib/IsZeroBuffer.c | 65 ++++++++++++++++++++++ .../Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf | 1 + MdePkg/Library/BaseMemoryLibMmx/IsZeroBuffer.c | 65 ++++++++++++++++++++++ .../BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf | 2 + MdePkg/Library/BaseMemoryLibOptDxe/IsZeroBuffer.c | 65 ++++++++++++++++++++++ .../BaseMemoryLibOptPei/BaseMemoryLibOptPei.inf | 2 + MdePkg/Library/BaseMemoryLibOptPei/IsZeroBuffer.c | 65 ++++++++++++++++++++++ .../BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf | 1 + MdePkg/Library/BaseMemoryLibRepStr/IsZeroBuffer.c | 65 ++++++++++++++++++++++ .../BaseMemoryLibSse2/BaseMemoryLibSse2.inf | 1 + MdePkg/Library/BaseMemoryLibSse2/IsZeroBuffer.c | 65 ++++++++++++++++++++++ MdePkg/Library/PeiMemoryLib/IsZeroBuffer.c | 65 ++++++++++++++++++++++ MdePkg/Library/PeiMemoryLib/PeiMemoryLib.inf | 1 + MdePkg/Library/UefiMemoryLib/IsZeroBuffer.c | 65 ++++++++++++++++++++++ MdePkg/Library/UefiMemoryLib/UefiMemoryLib.inf | 1 + 17 files changed, 553 insertions(+) create mode 100644 MdePkg/Library/BaseMemoryLib/IsZeroBuffer.c create mode 100644 MdePkg/Library/BaseMemoryLibMmx/IsZeroBuffer.c create mode 100644 MdePkg/Library/BaseMemoryLibOptDxe/IsZeroBuffer.c create mode 100644 MdePkg/Library/BaseMemoryLibOptPei/IsZeroBuffer.c create mode 100644 MdePkg/Library/BaseMemoryLibRepStr/IsZeroBuffer.c create mode 100644 MdePkg/Library/BaseMemoryLibSse2/IsZeroBuffer.c create mode 100644 MdePkg/Library/PeiMemoryLib/IsZeroBuffer.c create mode 100644 MdePkg/Library/UefiMemoryLib/IsZeroBuffer.c
diff --git a/MdePkg/Include/Library/BaseMemoryLib.h b/MdePkg/Include/Library/BaseMemoryLib.h index 5a57dee..1338c27 100644 --- a/MdePkg/Include/Library/BaseMemoryLib.h +++ b/MdePkg/Include/Library/BaseMemoryLib.h @@ -463,4 +463,27 @@ IsZeroGuid ( IN CONST GUID *Guid ); +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ); + #endif diff --git a/MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf b/MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf index 5dfab35..51b4d16 100644 --- a/MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf +++ b/MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf @@ -45,6 +45,7 @@ MemLibGeneric.c MemLibGuid.c CopyMem.c + IsZeroBuffer.c MemLibInternals.h [Packages] diff --git a/MdePkg/Library/BaseMemoryLib/IsZeroBuffer.c b/MdePkg/Library/BaseMemoryLib/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/BaseMemoryLib/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf b/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf index a609073..59261f9 100644 --- a/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf +++ b/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf @@ -47,6 +47,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c MemLibInternals.h [Sources.Ia32] diff --git a/MdePkg/Library/BaseMemoryLibMmx/IsZeroBuffer.c b/MdePkg/Library/BaseMemoryLibMmx/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibMmx/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf b/MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf index e637034..a75270b 100644 --- a/MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf +++ b/MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf @@ -90,6 +90,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c [Sources.X64] X64/ScanMem64.nasm @@ -137,6 +138,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c [Packages] MdePkg/MdePkg.dec diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/IsZeroBuffer.c b/MdePkg/Library/BaseMemoryLibOptDxe/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibOptDxe/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/BaseMemoryLibOptPei/BaseMemoryLibOptPei.inf b/MdePkg/Library/BaseMemoryLibOptPei/BaseMemoryLibOptPei.inf index ff60e9e..bd915eb 100644 --- a/MdePkg/Library/BaseMemoryLibOptPei/BaseMemoryLibOptPei.inf +++ b/MdePkg/Library/BaseMemoryLibOptPei/BaseMemoryLibOptPei.inf @@ -90,6 +90,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c [Sources.X64] X64/ScanMem64.nasm @@ -137,6 +138,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c [Packages] diff --git a/MdePkg/Library/BaseMemoryLibOptPei/IsZeroBuffer.c b/MdePkg/Library/BaseMemoryLibOptPei/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibOptPei/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf index 9d7ce4b..aac7865 100644 --- a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf +++ b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf @@ -44,6 +44,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c [Sources.Ia32] Ia32/ScanMem64.nasm diff --git a/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBuffer.c b/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf index a78d823..2919827 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf +++ b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf @@ -43,6 +43,7 @@ SetMemWrapper.c CopyMemWrapper.c MemLibGuid.c + IsZeroBuffer.c [Sources.Ia32] Ia32/ScanMem64.nasm diff --git a/MdePkg/Library/BaseMemoryLibSse2/IsZeroBuffer.c b/MdePkg/Library/BaseMemoryLibSse2/IsZeroBuffer.c new file mode 100644 index 0000000..6a3a2c1 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/PeiMemoryLib/IsZeroBuffer.c b/MdePkg/Library/PeiMemoryLib/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/PeiMemoryLib/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/PeiMemoryLib/PeiMemoryLib.inf b/MdePkg/Library/PeiMemoryLib/PeiMemoryLib.inf index 58af9d0..9760639 100644 --- a/MdePkg/Library/PeiMemoryLib/PeiMemoryLib.inf +++ b/MdePkg/Library/PeiMemoryLib/PeiMemoryLib.inf @@ -45,6 +45,7 @@ MemLibGeneric.c MemLibGuid.c MemLib.c + IsZeroBuffer.c MemLibInternals.h diff --git a/MdePkg/Library/UefiMemoryLib/IsZeroBuffer.c b/MdePkg/Library/UefiMemoryLib/IsZeroBuffer.c new file mode 100644 index 0000000..fda0c7c --- /dev/null +++ b/MdePkg/Library/UefiMemoryLib/IsZeroBuffer.c @@ -0,0 +1,65 @@ +/** @file + Implementation of IsZeroBuffer function. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include <Base.h> +#include <Library/DebugLib.h> + +/** + Checks if the contents of a buffer are all zeros. + + This function checks whether the contents of a buffer are all zeros. If the + contents are all zeros, return TRUE. Otherwise, return FALSE. + + If Length > 0 and Buffer is NULL, then ASSERT(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the buffer to be checked. + @param Length The size of the buffer (in bytes) to be checked. + + @retval TRUE Contents of the buffer are all zeros. + @retval FALSE Contents of the buffer are not all zeros. + +**/ +BOOLEAN +EFIAPI +IsZeroBuffer ( + IN CONST VOID *Buffer, + IN UINTN Length + ) +{ + CONST UINT8 *BufferData; + UINTN Index; + + ASSERT (!(Buffer == NULL && Length > 0)); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + + BufferData = Buffer; + for (Index = 0; Index < Length; Index++) { + if (BufferData[Index] != 0) { + return FALSE; + } + } + return TRUE; +} diff --git a/MdePkg/Library/UefiMemoryLib/UefiMemoryLib.inf b/MdePkg/Library/UefiMemoryLib/UefiMemoryLib.inf index e82732f..2ea7875 100644 --- a/MdePkg/Library/UefiMemoryLib/UefiMemoryLib.inf +++ b/MdePkg/Library/UefiMemoryLib/UefiMemoryLib.inf @@ -45,6 +45,7 @@ MemLibGeneric.c MemLibGuid.c MemLib.c + IsZeroBuffer.c MemLibInternals.h -- 1.9.5.msysgit.0 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
