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Add Mde String and PrintLibs. Port StrGather to the Mde Unicode implementation. Compile with 2 byte wchars. Now StrGather works with gcc.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@358 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bbahnsen
2006-05-31 21:02:55 +00:00
parent 180527dff7
commit d2ec0d9ef6
10 changed files with 1946 additions and 82 deletions
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809
Tools/Source/TianoTools/String/String.c Normal file
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@ -0,0 +1,809 @@
/** @file
Unicode string primatives.
Copyright (c) 2006, Intel Corporation<BR>
All rights reserved. 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.
Module Name: String.c
**/
#include <assert.h>
#include <Base.h>
#include <UefiBaseTypes.h>
#include <BaseLib.h>
#include <PcdLib.h>
#include <CommonLib.h>
#define _gPcd_FixedAtBuild_PcdMaximumUnicodeStringLength 0
#define _gPcd_FixedAtBuild_PcdMaximumAsciiStringLength 0
/**
Copies one Null-terminated Unicode string to another Null-terminated Unicode
string and returns the new Unicode string.
This function copies the contents of the Unicode string Source to the Unicode
string Destination, and returns Destination. If Source and Destination
overlap, then the results are undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and Source contains more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param Destination Pointer to a Null-terminated Unicode string.
@param Source Pointer to a Null-terminated Unicode string.
@return Destiantion
**/
CHAR16 *
EFIAPI
StrCpy (
OUT CHAR16 *Destination,
IN CONST CHAR16 *Source
)
{
CHAR16 *ReturnValue;
//
// Destination cannot be NULL
//
ASSERT (Destination != NULL);
//
// Destination and source cannot overlap
//
ASSERT ((UINTN)(Destination - Source) > StrLen (Source));
ASSERT ((UINTN)(Source - Destination) > StrLen (Source));
ReturnValue = Destination;
while (*Source) {
*(Destination++) = *(Source++);
}
*Destination = 0;
return ReturnValue;
}
/**
Copies one Null-terminated Unicode string with a maximum length to another
Null-terminated Unicode string with a maximum length and returns the new
Unicode string.
This function copies the contents of the Unicode string Source to the Unicode
string Destination, and returns Destination. At most, Length Unicode
characters are copied from Source to Destination. If Length is 0, then
Destination is returned unmodified. If Length is greater that the number of
Unicode characters in Source, then Destination is padded with Null Unicode
characters. If Source and Destination overlap, then the results are
undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and Source contains more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param Destination Pointer to a Null-terminated Unicode string.
@param Source Pointer to a Null-terminated Unicode string.
@param Length Maximum number of Unicode characters to copy.
@return Destination
**/
CHAR16 *
EFIAPI
StrnCpy (
OUT CHAR16 *Destination,
IN CONST CHAR16 *Source,
IN UINTN Length
)
{
CHAR16 *ReturnValue;
if (Length == 0) {
return Destination;
}
//
// Destination cannot be NULL if Length is not zero
//
ASSERT (Destination != NULL);
//
// Destination and source cannot overlap
// Q: Does Source have to be NULL-terminated?
//
ASSERT ((UINTN)(Destination - Source) > StrLen (Source));
ASSERT ((UINTN)(Source - Destination) >= Length);
ReturnValue = Destination;
while ((*Source != L'\0') && (Length > 0)) {
*(Destination++) = *(Source++);
Length--;
}
// ZeroMem (Destination, Length * sizeof (*Destination));
memset (Destination, 0, Length * sizeof (*Destination));
return ReturnValue;
}
/**
Returns the length of a Null-terminated Unicode string.
This function returns the number of Unicode characters in the Null-terminated
Unicode string specified by String.
If String is NULL, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and String contains more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param String Pointer to a Null-terminated Unicode string.
@return The length of String.
**/
UINTN
EFIAPI
StrLen (
IN CONST CHAR16 *String
)
{
UINTN Length;
ASSERT (String != NULL);
for (Length = 0; *String != L'\0'; String++, Length++) {
//
// If PcdMaximumUnicodeStringLength is not zero,
// length should not more than PcdMaximumUnicodeStringLength
//
if (FixedPcdGet32 (PcdMaximumUnicodeStringLength) != 0) {
ASSERT (Length < FixedPcdGet32 (PcdMaximumUnicodeStringLength));
}
}
return Length;
}
/**
Returns the size of a Null-terminated Unicode string in bytes, including the
Null terminator.
This function returns the size, in bytes, of the Null-terminated Unicode
string specified by String.
If String is NULL, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and String contains more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param String Pointer to a Null-terminated Unicode string.
@return The size of String.
**/
UINTN
EFIAPI
StrSize (
IN CONST CHAR16 *String
)
{
return (StrLen (String) + 1) * sizeof (*String);
}
/**
Compares two Null-terminated Unicode strings, and returns the difference
between the first mismatched Unicode characters.
This function compares the Null-terminated Unicode string FirstString to the
Null-terminated Unicode string SecondString. If FirstString is identical to
SecondString, then 0 is returned. Otherwise, the value returned is the first
mismatched Unicode character in SecondString subtracted from the first
mismatched Unicode character in FirstString.
If FirstString is NULL, then ASSERT().
If SecondString is NULL, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more
than PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more
than PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param FirstString Pointer to a Null-terminated Unicode string.
@param SecondString Pointer to a Null-terminated Unicode string.
@retval 0 FirstString is identical to SecondString.
@retval !=0 FirstString is not identical to SecondString.
**/
INTN
EFIAPI
StrCmp (
IN CONST CHAR16 *FirstString,
IN CONST CHAR16 *SecondString
)
{
//
// ASSERT both strings are less long than PcdMaximumUnicodeStringLength
//
ASSERT (StrSize (FirstString) != 0);
ASSERT (StrSize (SecondString) != 0);
while ((*FirstString != L'\0') && (*FirstString == *SecondString)) {
FirstString++;
SecondString++;
}
return *FirstString - *SecondString;
}
/**
Compares two Null-terminated Unicode strings with maximum lengths, and
returns the difference between the first mismatched Unicode characters.
This function compares the Null-terminated Unicode string FirstString to the
Null-terminated Unicode string SecondString. At most, Length Unicode
characters will be compared. If Length is 0, then 0 is returned. If
FirstString is identical to SecondString, then 0 is returned. Otherwise, the
value returned is the first mismatched Unicode character in SecondString
subtracted from the first mismatched Unicode character in FirstString.
If FirstString is NULL, then ASSERT().
If SecondString is NULL, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more
than PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more
than PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param FirstString Pointer to a Null-terminated Unicode string.
@param SecondString Pointer to a Null-terminated Unicode string.
@param Length Maximum number of Unicode characters to compare.
@retval 0 FirstString is identical to SecondString.
@retval !=0 FirstString is not identical to SecondString.
**/
INTN
EFIAPI
StrnCmp (
IN CONST CHAR16 *FirstString,
IN CONST CHAR16 *SecondString,
IN UINTN Length
)
{
if (Length == 0) {
return 0;
}
//
// ASSERT both strings are less long than PcdMaximumUnicodeStringLength.
// Length tests are performed inside StrLen().
//
ASSERT (StrSize (FirstString) != 0);
ASSERT (StrSize (SecondString) != 0);
while ((*FirstString != L'\0') &&
(*FirstString == *SecondString) &&
(Length > 1)) {
FirstString++;
SecondString++;
Length--;
}
return *FirstString - *SecondString;
}
/**
Concatenates one Null-terminated Unicode string to another Null-terminated
Unicode string, and returns the concatenated Unicode string.
This function concatenates two Null-terminated Unicode strings. The contents
of Null-terminated Unicode string Source are concatenated to the end of
Null-terminated Unicode string Destination. The Null-terminated concatenated
Unicode String is returned. If Source and Destination overlap, then the
results are undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and Destination contains more
than PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and Source contains more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination
and Source results in a Unicode string with more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param Destination Pointer to a Null-terminated Unicode string.
@param Source Pointer to a Null-terminated Unicode string.
@return Destination
**/
CHAR16 *
EFIAPI
StrCat (
IN OUT CHAR16 *Destination,
IN CONST CHAR16 *Source
)
{
StrCpy (Destination + StrLen (Destination), Source);
//
// Size of the resulting string should never be zero.
// PcdMaximumUnicodeStringLength is tested inside StrLen().
//
ASSERT (StrSize (Destination) != 0);
return Destination;
}
/**
Concatenates one Null-terminated Unicode string with a maximum length to the
end of another Null-terminated Unicode string, and returns the concatenated
Unicode string.
This function concatenates two Null-terminated Unicode strings. The contents
of Null-terminated Unicode string Source are concatenated to the end of
Null-terminated Unicode string Destination, and Destination is returned. At
most, Length Unicode characters are concatenated from Source to the end of
Destination, and Destination is always Null-terminated. If Length is 0, then
Destination is returned unmodified. If Source and Destination overlap, then
the results are undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and Destination contains more
than PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and Source contains more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination
and Source results in a Unicode string with more than
PcdMaximumUnicodeStringLength Unicode characters, then ASSERT().
@param Destination Pointer to a Null-terminated Unicode string.
@param Source Pointer to a Null-terminated Unicode string.
@param Length Maximum number of Unicode characters to concatenate from
Source.
@return Destination
**/
CHAR16 *
EFIAPI
StrnCat (
IN OUT CHAR16 *Destination,
IN CONST CHAR16 *Source,
IN UINTN Length
)
{
StrnCpy (Destination + StrLen (Destination), Source, Length);
//
// Size of the resulting string should never be zero.
// PcdMaximumUnicodeStringLength is tested inside StrLen().
//
ASSERT (StrSize (Destination) != 0);
return Destination;
}
/**
Copies one Null-terminated ASCII string to another Null-terminated ASCII
string and returns the new ASCII string.
This function copies the contents of the ASCII string Source to the ASCII
string Destination, and returns Destination. If Source and Destination
overlap, then the results are undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and Source contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param Destination Pointer to a Null-terminated ASCII string.
@param Source Pointer to a Null-terminated ASCII string.
@return Destination
**/
CHAR8 *
EFIAPI
AsciiStrCpy (
OUT CHAR8 *Destination,
IN CONST CHAR8 *Source
)
{
CHAR8 *ReturnValue;
//
// Destination cannot be NULL
//
ASSERT (Destination != NULL);
//
// Destination and source cannot overlap
//
ASSERT ((UINTN)(Destination - Source) > AsciiStrLen (Source));
ASSERT ((UINTN)(Source - Destination) > AsciiStrLen (Source));
ReturnValue = Destination;
while (*Source) {
*(Destination++) = *(Source++);
}
*Destination = 0;
return ReturnValue;
}
/**
Copies one Null-terminated ASCII string with a maximum length to another
Null-terminated ASCII string with a maximum length and returns the new ASCII
string.
This function copies the contents of the ASCII string Source to the ASCII
string Destination, and returns Destination. At most, Length ASCII characters
are copied from Source to Destination. If Length is 0, then Destination is
returned unmodified. If Length is greater that the number of ASCII characters
in Source, then Destination is padded with Null ASCII characters. If Source
and Destination overlap, then the results are undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumAsciiStringLength is not zero, and Source contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param Destination Pointer to a Null-terminated ASCII string.
@param Source Pointer to a Null-terminated ASCII string.
@param Length Maximum number of ASCII characters to copy.
@return Destination
**/
CHAR8 *
EFIAPI
AsciiStrnCpy (
OUT CHAR8 *Destination,
IN CONST CHAR8 *Source,
IN UINTN Length
)
{
CHAR8 *ReturnValue;
if (Length == 0) {
return Destination;
}
//
// Destination cannot be NULL
//
ASSERT (Destination != NULL);
//
// Destination and source cannot overlap
//
ASSERT ((UINTN)(Destination - Source) > AsciiStrLen (Source));
ASSERT ((UINTN)(Source - Destination) >= Length);
ReturnValue = Destination;
while (*Source && Length > 0) {
*(Destination++) = *(Source++);
Length--;
}
// ZeroMem (Destination, Length * sizeof (*Destination));
memset (Destination, 0, Length * sizeof (*Destination));
return ReturnValue;
}
/**
Returns the length of a Null-terminated ASCII string.
This function returns the number of ASCII characters in the Null-terminated
ASCII string specified by String.
If String is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and String contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param String Pointer to a Null-terminated ASCII string.
@return The length of String.
**/
UINTN
EFIAPI
AsciiStrLen (
IN CONST CHAR8 *String
)
{
UINTN Length;
ASSERT (String != NULL);
for (Length = 0; *String != '\0'; String++, Length++) {
//
// If PcdMaximumUnicodeStringLength is not zero,
// length should not more than PcdMaximumUnicodeStringLength
//
if (FixedPcdGet32 (PcdMaximumAsciiStringLength) != 0) {
ASSERT (Length < FixedPcdGet32 (PcdMaximumAsciiStringLength));
}
}
return Length;
}
/**
Returns the size of a Null-terminated ASCII string in bytes, including the
Null terminator.
This function returns the size, in bytes, of the Null-terminated ASCII string
specified by String.
If String is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and String contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param String Pointer to a Null-terminated ASCII string.
@return The size of String.
**/
UINTN
EFIAPI
AsciiStrSize (
IN CONST CHAR8 *String
)
{
return (AsciiStrLen (String) + 1) * sizeof (*String);
}
/**
Compares two Null-terminated ASCII strings, and returns the difference
between the first mismatched ASCII characters.
This function compares the Null-terminated ASCII string FirstString to the
Null-terminated ASCII string SecondString. If FirstString is identical to
SecondString, then 0 is returned. Otherwise, the value returned is the first
mismatched ASCII character in SecondString subtracted from the first
mismatched ASCII character in FirstString.
If FirstString is NULL, then ASSERT().
If SecondString is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and FirstString contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and SecondString contains more
than PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param FirstString Pointer to a Null-terminated ASCII string.
@param SecondString Pointer to a Null-terminated ASCII string.
@retval 0 FirstString is identical to SecondString.
@retval !=0 FirstString is not identical to SecondString.
**/
INTN
EFIAPI
AsciiStrCmp (
IN CONST CHAR8 *FirstString,
IN CONST CHAR8 *SecondString
)
{
//
// ASSERT both strings are less long than PcdMaximumAsciiStringLength
//
ASSERT (AsciiStrSize (FirstString));
ASSERT (AsciiStrSize (SecondString));
while ((*FirstString != '\0') && (*FirstString == *SecondString)) {
FirstString++;
SecondString++;
}
return *FirstString - *SecondString;
}
STATIC
CHAR8
EFIAPI
AsciiToUpper (
IN CHAR8 Chr
)
{
return (Chr >= 'a' && Chr <= 'z') ? Chr - ('a' - 'A') : Chr;
}
/**
Performs a case insensitive comparison of two Null-terminated ASCII strings,
and returns the difference between the first mismatched ASCII characters.
This function performs a case insensitive comparison of the Null-terminated
ASCII string FirstString to the Null-terminated ASCII string SecondString. If
FirstString is identical to SecondString, then 0 is returned. Otherwise, the
value returned is the first mismatched lower case ASCII character in
SecondString subtracted from the first mismatched lower case ASCII character
in FirstString.
If FirstString is NULL, then ASSERT().
If SecondString is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and FirstString contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and SecondString contains more
than PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param FirstString Pointer to a Null-terminated ASCII string.
@param SecondString Pointer to a Null-terminated ASCII string.
@retval 0 FirstString is identical to SecondString using case insensitive
comparisons.
@retval !=0 FirstString is not identical to SecondString using case
insensitive comparisons.
**/
INTN
EFIAPI
AsciiStriCmp (
IN CONST CHAR8 *FirstString,
IN CONST CHAR8 *SecondString
)
{
//
// ASSERT both strings are less long than PcdMaximumAsciiStringLength
//
ASSERT (AsciiStrSize (FirstString));
ASSERT (AsciiStrSize (SecondString));
while ((*FirstString != '\0') &&
(AsciiToUpper (*FirstString) == AsciiToUpper (*SecondString))) {
FirstString++;
SecondString++;
}
return AsciiToUpper (*FirstString) - AsciiToUpper (*SecondString);
}
/**
Compares two Null-terminated ASCII strings with maximum lengths, and returns
the difference between the first mismatched ASCII characters.
This function compares the Null-terminated ASCII string FirstString to the
Null-terminated ASCII string SecondString. At most, Length ASCII characters
will be compared. If Length is 0, then 0 is returned. If FirstString is
identical to SecondString, then 0 is returned. Otherwise, the value returned
is the first mismatched ASCII character in SecondString subtracted from the
first mismatched ASCII character in FirstString.
If FirstString is NULL, then ASSERT().
If SecondString is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and FirstString contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and SecondString contains more
than PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
@param FirstString Pointer to a Null-terminated ASCII string.
@param SecondString Pointer to a Null-terminated ASCII string.
@retval 0 FirstString is identical to SecondString.
@retval !=0 FirstString is not identical to SecondString.
**/
INTN
EFIAPI
AsciiStrnCmp (
IN CONST CHAR8 *FirstString,
IN CONST CHAR8 *SecondString,
IN UINTN Length
)
{
//
// ASSERT both strings are less long than PcdMaximumAsciiStringLength
//
ASSERT (AsciiStrSize (FirstString));
ASSERT (AsciiStrSize (SecondString));
while ((*FirstString != '\0') &&
(*FirstString == *SecondString) &&
(Length > 1)) {
FirstString++;
SecondString++;
Length--;
}
return *FirstString - *SecondString;
}
/**
Concatenates one Null-terminated ASCII string to another Null-terminated
ASCII string, and returns the concatenated ASCII string.
This function concatenates two Null-terminated ASCII strings. The contents of
Null-terminated ASCII string Source are concatenated to the end of Null-
terminated ASCII string Destination. The Null-terminated concatenated ASCII
String is returned.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and Destination contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and Source contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero and concatenating Destination and
Source results in a ASCII string with more than PcdMaximumAsciiStringLength
ASCII characters, then ASSERT().
@param Destination Pointer to a Null-terminated ASCII string.
@param Source Pointer to a Null-terminated ASCII string.
@return Destination
**/
CHAR8 *
EFIAPI
AsciiStrCat (
IN OUT CHAR8 *Destination,
IN CONST CHAR8 *Source
)
{
AsciiStrCpy (Destination + AsciiStrLen (Destination), Source);
//
// Size of the resulting string should never be zero.
// PcdMaximumUnicodeStringLength is tested inside StrLen().
//
ASSERT (AsciiStrSize (Destination) != 0);
return Destination;
}
/**
Concatenates one Null-terminated ASCII string with a maximum length to the
end of another Null-terminated ASCII string, and returns the concatenated
ASCII string.
This function concatenates two Null-terminated ASCII strings. The contents
of Null-terminated ASCII string Source are concatenated to the end of Null-
terminated ASCII string Destination, and Destination is returned. At most,
Length ASCII characters are concatenated from Source to the end of
Destination, and Destination is always Null-terminated. If Length is 0, then
Destination is returned unmodified. If Source and Destination overlap, then
the results are undefined.
If Destination is NULL, then ASSERT().
If Source is NULL, then ASSERT().
If Source and Destination overlap, then ASSERT().
If PcdMaximumAsciiStringLength is not zero, and Destination contains more
than PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero, and Source contains more than
PcdMaximumAsciiStringLength ASCII characters, then ASSERT().
If PcdMaximumAsciiStringLength is not zero, and concatenating Destination and
Source results in a ASCII string with more than PcdMaximumAsciiStringLength
ASCII characters, then ASSERT().
@param Destination Pointer to a Null-terminated ASCII string.
@param Source Pointer to a Null-terminated ASCII string.
@param Length Maximum number of ASCII characters to concatenate from
Source.
@return Destination
**/
CHAR8 *
EFIAPI
AsciiStrnCat (
IN OUT CHAR8 *Destination,
IN CONST CHAR8 *Source,
IN UINTN Length
)
{
AsciiStrnCpy (Destination + AsciiStrLen (Destination), Source, Length);
//
// Size of the resulting string should never be zero.
// PcdMaximumUnicodeStringLength is tested inside StrLen().
//
ASSERT (AsciiStrSize (Destination) != 0);
return Destination;
}