Add safe string function to base lib.

Contributed-under: TianoCore Contribution Agreement 1.0

signed off by: Yao, Jiewen <jiewen.yao@intel.com>
reviewed by: Ni, Ruiyu <ruiyu.ni@intel.com>
reviewed by: Long, Qin <qin.long@intel.com>
reviewed by: Kinney, Michael D <michael.d.kinney@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16312 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jyao1
2014-11-07 13:43:05 +00:00
parent 848834cbd1
commit c058d59f40
3 changed files with 1197 additions and 1 deletions

View File

@@ -2,7 +2,7 @@
Provides string functions, linked list functions, math functions, synchronization
functions, and CPU architecture-specific functions.
Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -183,6 +183,304 @@ typedef struct {
// String Services
//
/**
Returns the length of a Null-terminated Unicode string.
If String is not aligned on a 16-bit boundary, then ASSERT().
@param String A pointer to a Null-terminated Unicode string.
@param MaxSize The maximum number of Destination Unicode
char, including terminating null char.
@retval 0 If String is NULL.
@retval MaxSize If there is no null character in the first MaxSize characters of String.
@return The number of characters that percede the terminating null character.
**/
UINTN
EFIAPI
StrnLenS (
IN CONST CHAR16 *String,
IN UINTN MaxSize
);
/**
Copies the string pointed to by Source (including the terminating null char)
to the array pointed to by Destination.
If Destination is not aligned on a 16-bit boundary, then ASSERT().
If Source is not aligned on a 16-bit boundary, then ASSERT().
@param Destination A pointer to a Null-terminated Unicode string.
@param DestMax The maximum number of Destination Unicode
char, including terminating null char.
@param Source A pointer to a Null-terminated Unicode string.
@retval RETURN_SUCCESS String is copied.
@retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than StrLen(Source).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumUnicodeStringLength is not zero,
and DestMax is greater than
PcdMaximumUnicodeStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
StrCpyS (
OUT CHAR16 *Destination,
IN UINTN DestMax,
IN CONST CHAR16 *Source
);
/**
Copies not more than Length successive char from the string pointed to by
Source to the array pointed to by Destination. If no null char is copied from
Source, then Destination[Length] is always set to null.
If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT().
If Length > 0 and Source is not aligned on a 16-bit boundary, then ASSERT().
@param Destination A pointer to a Null-terminated Unicode string.
@param DestMax The maximum number of Destination Unicode
char, including terminating null char.
@param Source A pointer to a Null-terminated Unicode string.
@param Length The maximum number of Unicode characters to copy.
@retval RETURN_SUCCESS String is copied.
@retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than
MIN(StrLen(Source), Length).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumUnicodeStringLength is not zero,
and DestMax is greater than
PcdMaximumUnicodeStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
StrnCpyS (
OUT CHAR16 *Destination,
IN UINTN DestMax,
IN CONST CHAR16 *Source,
IN UINTN Length
);
/**
Appends a copy of the string pointed to by Source (including the terminating
null char) to the end of the string pointed to by Destination.
If Destination is not aligned on a 16-bit boundary, then ASSERT().
If Source is not aligned on a 16-bit boundary, then ASSERT().
@param Destination A pointer to a Null-terminated Unicode string.
@param DestMax The maximum number of Destination Unicode
char, including terminating null char.
@param Source A pointer to a Null-terminated Unicode string.
@retval RETURN_SUCCESS String is appended.
@retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than
StrLen(Destination).
@retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT
greater than StrLen(Source).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumUnicodeStringLength is not zero,
and DestMax is greater than
PcdMaximumUnicodeStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
StrCatS (
IN OUT CHAR16 *Destination,
IN UINTN DestMax,
IN CONST CHAR16 *Source
);
/**
Appends not more than Length successive char from the string pointed to by
Source to the end of the string pointed to by Destination. If no null char is
copied from Source, then Destination[StrLen(Destination) + Length] is always
set to null.
If Destination is not aligned on a 16-bit boundary, then ASSERT().
If and Source is not aligned on a 16-bit boundary, then ASSERT().
@param Destination A pointer to a Null-terminated Unicode string.
@param DestMax The maximum number of Destination Unicode
char, including terminating null char.
@param Source A pointer to a Null-terminated Unicode string.
@param Length The maximum number of Unicode characters to copy.
@retval RETURN_SUCCESS String is appended.
@retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than
StrLen(Destination).
@retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT
greater than MIN(StrLen(Source), Length).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumUnicodeStringLength is not zero,
and DestMax is greater than
PcdMaximumUnicodeStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
StrnCatS (
IN OUT CHAR16 *Destination,
IN UINTN DestMax,
IN CONST CHAR16 *Source,
IN UINTN Length
);
/**
Returns the length of a Null-terminated Ascii string.
@param String A pointer to a Null-terminated Ascii string.
@param MaxSize The maximum number of Destination Ascii
char, including terminating null char.
@retval 0 If String is NULL.
@retval MaxSize If there is no null character in the first MaxSize characters of String.
@return The number of characters that percede the terminating null character.
**/
UINTN
EFIAPI
AsciiStrnLenS (
IN CONST CHAR8 *String,
IN UINTN MaxSize
);
/**
Copies the string pointed to by Source (including the terminating null char)
to the array pointed to by Destination.
@param Destination A pointer to a Null-terminated Ascii string.
@param DestMax The maximum number of Destination Ascii
char, including terminating null char.
@param Source A pointer to a Null-terminated Ascii string.
@retval RETURN_SUCCESS String is copied.
@retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than StrLen(Source).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumAsciiStringLength is not zero,
and DestMax is greater than
PcdMaximumAsciiStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
AsciiStrCpyS (
OUT CHAR8 *Destination,
IN UINTN DestMax,
IN CONST CHAR8 *Source
);
/**
Copies not more than Length successive char from the string pointed to by
Source to the array pointed to by Destination. If no null char is copied from
Source, then Destination[Length] is always set to null.
@param Destination A pointer to a Null-terminated Ascii string.
@param DestMax The maximum number of Destination Ascii
char, including terminating null char.
@param Source A pointer to a Null-terminated Ascii string.
@param Length The maximum number of Ascii characters to copy.
@retval RETURN_SUCCESS String is copied.
@retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than
MIN(StrLen(Source), Length).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumAsciiStringLength is not zero,
and DestMax is greater than
PcdMaximumAsciiStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
AsciiStrnCpyS (
OUT CHAR8 *Destination,
IN UINTN DestMax,
IN CONST CHAR8 *Source,
IN UINTN Length
);
/**
Appends a copy of the string pointed to by Source (including the terminating
null char) to the end of the string pointed to by Destination.
@param Destination A pointer to a Null-terminated Ascii string.
@param DestMax The maximum number of Destination Ascii
char, including terminating null char.
@param Source A pointer to a Null-terminated Ascii string.
@retval RETURN_SUCCESS String is appended.
@retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than
StrLen(Destination).
@retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT
greater than StrLen(Source).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumAsciiStringLength is not zero,
and DestMax is greater than
PcdMaximumAsciiStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
AsciiStrCatS (
IN OUT CHAR8 *Destination,
IN UINTN DestMax,
IN CONST CHAR8 *Source
);
/**
Appends not more than Length successive char from the string pointed to by
Source to the end of the string pointed to by Destination. If no null char is
copied from Source, then Destination[StrLen(Destination) + Length] is always
set to null.
@param Destination A pointer to a Null-terminated Ascii string.
@param DestMax The maximum number of Destination Ascii
char, including terminating null char.
@param Source A pointer to a Null-terminated Ascii string.
@param Length The maximum number of Ascii characters to copy.
@retval RETURN_SUCCESS String is appended.
@retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than
StrLen(Destination).
@retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT
greater than MIN(StrLen(Source), Length).
@retval RETURN_INVALID_PARAMETER If Destination is NULL.
If Source is NULL.
If PcdMaximumAsciiStringLength is not zero,
and DestMax is greater than
PcdMaximumAsciiStringLength.
If DestMax is 0.
@retval RETURN_ACCESS_DENIED If Source and Destination overlap.
**/
RETURN_STATUS
EFIAPI
AsciiStrnCatS (
IN OUT CHAR8 *Destination,
IN UINTN DestMax,
IN CONST CHAR8 *Source,
IN UINTN Length
);
/**
Copies one Null-terminated Unicode string to another Null-terminated Unicode
string and returns the new Unicode string.