604371b98d
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1676 6f19259b-4bc3-4df7-8a09-765794883524
733 lines
21 KiB
C
733 lines
21 KiB
C
/*++
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Copyright (c) 2004-2006 Intel Corporation. All rights reserved
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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String.c
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Abstract:
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Unicode and ASCII string primatives.
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--*/
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#include <assert.h>
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#include <Common/UefiBaseTypes.h>
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#include <string.h>
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#include "CommonLib.h"
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/**
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Returns the length of a Null-terminated Unicode string.
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This function returns the number of Unicode characters in the Null-terminated
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Unicode string specified by String.
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If String is NULL, then ASSERT().
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@param String Pointer to a Null-terminated Unicode string.
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@return The length of String.
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**/
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UINTN
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EFIAPI
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StrLen (
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IN CONST CHAR16 *String
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)
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{
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UINTN Length;
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ASSERT (String != NULL);
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for (Length = 0; *String != L'\0'; String++, Length++) {
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;
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}
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return Length;
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}
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/**
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Returns the length of a Null-terminated ASCII string.
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This function returns the number of ASCII characters in the Null-terminated
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ASCII string specified by String.
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If String is NULL, then ASSERT().
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@param String Pointer to a Null-terminated ASCII string.
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@return The length of String.
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**/
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UINTN
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EFIAPI
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AsciiStrLen (
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IN CONST CHAR8 *String
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)
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{
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UINTN Length;
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ASSERT (String != NULL);
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for (Length = 0; *String != '\0'; String++, Length++) {
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;
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}
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return Length;
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}
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/**
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Copies one Null-terminated Unicode string to another Null-terminated Unicode
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string and returns the new Unicode string.
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This function copies the contents of the Unicode string Source to the Unicode
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string Destination, and returns Destination. If Source and Destination
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overlap, then the results are undefined.
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If Destination is NULL, then ASSERT().
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If Source is NULL, then ASSERT().
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If Source and Destination overlap, then ASSERT().
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@param Destination Pointer to a Null-terminated Unicode string.
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@param Source Pointer to a Null-terminated Unicode string.
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@return Destiantion
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**/
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CHAR16 *
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EFIAPI
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StrCpy (
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OUT CHAR16 *Destination,
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IN CONST CHAR16 *Source
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)
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{
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CHAR16 *ReturnValue;
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//
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// Destination cannot be NULL
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//
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ASSERT (Destination != NULL);
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//
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// Destination and source cannot overlap
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//
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ASSERT ((UINTN)(Destination - Source) > StrLen (Source));
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ASSERT ((UINTN)(Source - Destination) > StrLen (Source));
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ReturnValue = Destination;
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while (*Source) {
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*(Destination++) = *(Source++);
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}
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*Destination = 0;
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return ReturnValue;
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}
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/**
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Copies one Null-terminated Unicode string with a maximum length to another
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Null-terminated Unicode string with a maximum length and returns the new
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Unicode string.
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This function copies the contents of the Unicode string Source to the Unicode
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string Destination, and returns Destination. At most, Length Unicode
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characters are copied from Source to Destination. If Length is 0, then
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Destination is returned unmodified. If Length is greater that the number of
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Unicode characters in Source, then Destination is padded with Null Unicode
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characters. If Source and Destination overlap, then the results are
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undefined.
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If Destination is NULL, then ASSERT().
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If Source is NULL, then ASSERT().
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If Source and Destination overlap, then ASSERT().
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@param Destination Pointer to a Null-terminated Unicode string.
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@param Source Pointer to a Null-terminated Unicode string.
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@param Length Maximum number of Unicode characters to copy.
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@return Destination
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**/
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CHAR16 *
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EFIAPI
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StrnCpy (
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OUT CHAR16 *Destination,
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IN CONST CHAR16 *Source,
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IN UINTN Length
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)
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{
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CHAR16 *ReturnValue;
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if (Length == 0) {
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return Destination;
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}
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//
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// Destination cannot be NULL if Length is not zero
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//
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ASSERT (Destination != NULL);
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//
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// Destination and source cannot overlap
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// Q: Does Source have to be NULL-terminated?
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//
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ASSERT ((UINTN)(Destination - Source) > StrLen (Source));
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ASSERT ((UINTN)(Source - Destination) >= Length);
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ReturnValue = Destination;
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while ((*Source != L'\0') && (Length > 0)) {
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*(Destination++) = *(Source++);
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Length--;
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}
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memset (Destination, 0, Length * sizeof (*Destination));
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return ReturnValue;
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}
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/**
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Returns the size of a Null-terminated Unicode string in bytes, including the
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Null terminator.
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This function returns the size, in bytes, of the Null-terminated Unicode
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string specified by String.
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If String is NULL, then ASSERT().
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@param String Pointer to a Null-terminated Unicode string.
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@return The size of String.
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**/
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UINTN
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EFIAPI
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StrSize (
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IN CONST CHAR16 *String
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)
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{
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return (StrLen (String) + 1) * sizeof (*String);
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}
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/**
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Compares two Null-terminated Unicode strings, and returns the difference
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between the first mismatched Unicode characters.
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This function compares the Null-terminated Unicode string FirstString to the
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Null-terminated Unicode string SecondString. If FirstString is identical to
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SecondString, then 0 is returned. Otherwise, the value returned is the first
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mismatched Unicode character in SecondString subtracted from the first
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mismatched Unicode character in FirstString.
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If FirstString is NULL, then ASSERT().
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If SecondString is NULL, then ASSERT().
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@param FirstString Pointer to a Null-terminated Unicode string.
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@param SecondString Pointer to a Null-terminated Unicode string.
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@retval 0 FirstString is identical to SecondString.
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@retval !=0 FirstString is not identical to SecondString.
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**/
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INTN
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EFIAPI
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StrCmp (
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IN CONST CHAR16 *FirstString,
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IN CONST CHAR16 *SecondString
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)
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{
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//
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// ASSERT both strings should never be zero
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//
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ASSERT (StrSize (FirstString) != 0);
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ASSERT (StrSize (SecondString) != 0);
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while ((*FirstString != L'\0') && (*FirstString == *SecondString)) {
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FirstString++;
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SecondString++;
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}
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return *FirstString - *SecondString;
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}
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/**
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Compares two Null-terminated Unicode strings with maximum lengths, and
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returns the difference between the first mismatched Unicode characters.
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This function compares the Null-terminated Unicode string FirstString to the
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Null-terminated Unicode string SecondString. At most, Length Unicode
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characters will be compared. If Length is 0, then 0 is returned. If
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FirstString is identical to SecondString, then 0 is returned. Otherwise, the
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value returned is the first mismatched Unicode character in SecondString
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subtracted from the first mismatched Unicode character in FirstString.
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If FirstString is NULL, then ASSERT().
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If SecondString is NULL, then ASSERT().
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@param FirstString Pointer to a Null-terminated Unicode string.
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@param SecondString Pointer to a Null-terminated Unicode string.
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@param Length Maximum number of Unicode characters to compare.
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@retval 0 FirstString is identical to SecondString.
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@retval !=0 FirstString is not identical to SecondString.
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**/
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INTN
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EFIAPI
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StrnCmp (
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IN CONST CHAR16 *FirstString,
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IN CONST CHAR16 *SecondString,
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IN UINTN Length
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)
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{
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if (Length == 0) {
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return 0;
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}
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//
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// ASSERT both strings should never be zero
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//
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ASSERT (StrSize (FirstString) != 0);
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ASSERT (StrSize (SecondString) != 0);
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while ((*FirstString != L'\0') &&
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(*FirstString == *SecondString) &&
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(Length > 1)) {
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FirstString++;
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SecondString++;
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Length--;
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}
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return *FirstString - *SecondString;
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}
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/**
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Concatenates one Null-terminated Unicode string to another Null-terminated
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Unicode string, and returns the concatenated Unicode string.
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This function concatenates two Null-terminated Unicode strings. The contents
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of Null-terminated Unicode string Source are concatenated to the end of
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Null-terminated Unicode string Destination. The Null-terminated concatenated
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Unicode String is returned. If Source and Destination overlap, then the
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results are undefined.
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If Destination is NULL, then ASSERT().
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If Source is NULL, then ASSERT().
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If Source and Destination overlap, then ASSERT().
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@param Destination Pointer to a Null-terminated Unicode string.
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@param Source Pointer to a Null-terminated Unicode string.
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@return Destination
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**/
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CHAR16 *
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EFIAPI
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StrCat (
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IN OUT CHAR16 *Destination,
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IN CONST CHAR16 *Source
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)
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{
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StrCpy (Destination + StrLen (Destination), Source);
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//
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// Size of the resulting string should never be zero.
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//
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ASSERT (StrSize (Destination) != 0);
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return Destination;
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}
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/**
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Concatenates one Null-terminated Unicode string with a maximum length to the
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end of another Null-terminated Unicode string, and returns the concatenated
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Unicode string.
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This function concatenates two Null-terminated Unicode strings. The contents
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of Null-terminated Unicode string Source are concatenated to the end of
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Null-terminated Unicode string Destination, and Destination is returned. At
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most, Length Unicode characters are concatenated from Source to the end of
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Destination, and Destination is always Null-terminated. If Length is 0, then
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Destination is returned unmodified. If Source and Destination overlap, then
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the results are undefined.
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If Destination is NULL, then ASSERT().
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If Source is NULL, then ASSERT().
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If Source and Destination overlap, then ASSERT().
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@param Destination Pointer to a Null-terminated Unicode string.
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@param Source Pointer to a Null-terminated Unicode string.
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@param Length Maximum number of Unicode characters to concatenate from
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Source.
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@return Destination
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**/
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CHAR16 *
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EFIAPI
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StrnCat (
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IN OUT CHAR16 *Destination,
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IN CONST CHAR16 *Source,
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IN UINTN Length
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)
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{
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StrnCpy (Destination + StrLen (Destination), Source, Length);
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//
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// Size of the resulting string should never be zero.
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//
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ASSERT (StrSize (Destination) != 0);
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return Destination;
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}
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/**
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Copies one Null-terminated ASCII string to another Null-terminated ASCII
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string and returns the new ASCII string.
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This function copies the contents of the ASCII string Source to the ASCII
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string Destination, and returns Destination. If Source and Destination
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overlap, then the results are undefined.
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If Destination is NULL, then ASSERT().
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If Source is NULL, then ASSERT().
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If Source and Destination overlap, then ASSERT().
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@param Destination Pointer to a Null-terminated ASCII string.
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@param Source Pointer to a Null-terminated ASCII string.
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@return Destination
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**/
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CHAR8 *
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EFIAPI
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AsciiStrCpy (
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OUT CHAR8 *Destination,
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IN CONST CHAR8 *Source
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)
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{
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CHAR8 *ReturnValue;
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//
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// Destination cannot be NULL
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//
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ASSERT (Destination != NULL);
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//
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// Destination and source cannot overlap
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//
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ASSERT ((UINTN)(Destination - Source) > AsciiStrLen (Source));
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ASSERT ((UINTN)(Source - Destination) > AsciiStrLen (Source));
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ReturnValue = Destination;
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while (*Source) {
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*(Destination++) = *(Source++);
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}
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*Destination = 0;
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return ReturnValue;
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}
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/**
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Copies one Null-terminated ASCII string with a maximum length to another
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Null-terminated ASCII string with a maximum length and returns the new ASCII
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string.
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This function copies the contents of the ASCII string Source to the ASCII
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string Destination, and returns Destination. At most, Length ASCII characters
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are copied from Source to Destination. If Length is 0, then Destination is
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returned unmodified. If Length is greater that the number of ASCII characters
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in Source, then Destination is padded with Null ASCII characters. If Source
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and Destination overlap, then the results are undefined.
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|
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If Destination is NULL, then ASSERT().
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If Source is NULL, then ASSERT().
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If Source and Destination overlap, then ASSERT().
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@param Destination Pointer to a Null-terminated ASCII string.
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@param Source Pointer to a Null-terminated ASCII string.
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@param Length Maximum number of ASCII characters to copy.
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@return Destination
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**/
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CHAR8 *
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EFIAPI
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AsciiStrnCpy (
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OUT CHAR8 *Destination,
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IN CONST CHAR8 *Source,
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IN UINTN Length
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)
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{
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CHAR8 *ReturnValue;
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if (Length == 0) {
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return Destination;
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}
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//
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// Destination cannot be NULL
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//
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ASSERT (Destination != NULL);
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//
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// Destination and source cannot overlap
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//
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ASSERT ((UINTN)(Destination - Source) > AsciiStrLen (Source));
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ASSERT ((UINTN)(Source - Destination) >= Length);
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ReturnValue = Destination;
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while (*Source && Length > 0) {
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*(Destination++) = *(Source++);
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Length--;
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}
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// ZeroMem (Destination, Length * sizeof (*Destination));
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memset (Destination, 0, Length * sizeof (*Destination));
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return ReturnValue;
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}
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/**
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Returns the size of a Null-terminated ASCII string in bytes, including the
|
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Null terminator.
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|
|
|
This function returns the size, in bytes, of the Null-terminated ASCII string
|
|
specified by String.
|
|
|
|
If String is NULL, then ASSERT().
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|
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@param String Pointer to a Null-terminated ASCII string.
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|
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@return The size of String.
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|
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|
**/
|
|
UINTN
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EFIAPI
|
|
AsciiStrSize (
|
|
IN CONST CHAR8 *String
|
|
)
|
|
{
|
|
return (AsciiStrLen (String) + 1) * sizeof (*String);
|
|
}
|
|
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|
/**
|
|
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().
|
|
|
|
@param FirstString Pointer to a Null-terminated ASCII string.
|
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@param SecondString Pointer to a Null-terminated ASCII string.
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|
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@retval 0 FirstString is identical to SecondString.
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@retval !=0 FirstString is not identical to SecondString.
|
|
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|
**/
|
|
INTN
|
|
EFIAPI
|
|
AsciiStrCmp (
|
|
IN CONST CHAR8 *FirstString,
|
|
IN CONST CHAR8 *SecondString
|
|
)
|
|
{
|
|
//
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|
// ASSERT both strings should never be zero
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//
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|
ASSERT (AsciiStrSize (FirstString));
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|
ASSERT (AsciiStrSize (SecondString));
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|
|
|
while ((*FirstString != '\0') && (*FirstString == *SecondString)) {
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FirstString++;
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SecondString++;
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}
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return *FirstString - *SecondString;
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}
|
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|
|
STATIC
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|
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,
|
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and returns the difference between the first mismatched ASCII characters.
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|
|
|
This function performs a case insensitive comparison of the Null-terminated
|
|
ASCII string FirstString to the Null-terminated ASCII string SecondString. If
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|
FirstString is identical to SecondString, then 0 is returned. Otherwise, the
|
|
value returned is the first mismatched lower case ASCII character in
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|
SecondString subtracted from the first mismatched lower case ASCII character
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|
in FirstString.
|
|
|
|
If FirstString is NULL, then ASSERT().
|
|
If SecondString is NULL, then ASSERT().
|
|
|
|
@param FirstString Pointer to a Null-terminated ASCII string.
|
|
@param SecondString Pointer to a Null-terminated ASCII string.
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|
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|
@retval 0 FirstString is identical to SecondString using case insensitive
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|
comparisons.
|
|
@retval !=0 FirstString is not identical to SecondString using case
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|
insensitive comparisons.
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**/
|
|
INTN
|
|
EFIAPI
|
|
AsciiStriCmp (
|
|
IN CONST CHAR8 *FirstString,
|
|
IN CONST CHAR8 *SecondString
|
|
)
|
|
{
|
|
//
|
|
// ASSERT both strings should never be zero
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|
//
|
|
ASSERT (AsciiStrSize (FirstString));
|
|
ASSERT (AsciiStrSize (SecondString));
|
|
|
|
while ((*FirstString != '\0') &&
|
|
(AsciiToUpper (*FirstString) == AsciiToUpper (*SecondString))) {
|
|
FirstString++;
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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().
|
|
|
|
@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 should never be zero
|
|
//
|
|
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().
|
|
|
|
@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.
|
|
//
|
|
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().
|
|
|
|
@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.
|
|
//
|
|
ASSERT (AsciiStrSize (Destination) != 0);
|
|
return Destination;
|
|
}
|