mirror of https://github.com/acidanthera/audk.git
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/** @file
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Provides interface to path manipulation functions.
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Copyright (c) 2011 - 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this 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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**/
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#include <Base.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/PathLib.h>
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#include <Library/BaseLib.h>
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#include <Protocol/SimpleTextIn.h>
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/**
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Removes the last directory or file entry in a path by changing the last
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L'\' to a CHAR_NULL.
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@param[in, out] Path The pointer to the path to modify.
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@retval FALSE Nothing was found to remove.
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@retval TRUE A directory or file was removed.
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**/
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BOOLEAN
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EFIAPI
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PathRemoveLastItem(
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IN OUT CHAR16 *Path
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)
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{
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CHAR16 *Walker;
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CHAR16 *LastSlash;
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//
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// get directory name from path... ('chop' off extra)
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//
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for ( Walker = Path, LastSlash = NULL
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; Walker != NULL && *Walker != CHAR_NULL
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; Walker++
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){
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if (*Walker == L'\\' && *(Walker + 1) != CHAR_NULL) {
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LastSlash = Walker+1;
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}
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}
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if (LastSlash != NULL) {
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*LastSlash = CHAR_NULL;
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return (TRUE);
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}
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return (FALSE);
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}
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/**
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Function to clean up paths.
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- Single periods in the path are removed.
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- Double periods in the path are removed along with a single parent directory.
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- Forward slashes L'/' are converted to backward slashes L'\'.
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This will be done inline and the existing buffer may be larger than required
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upon completion.
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@param[in] Path The pointer to the string containing the path.
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@retval NULL An error occured.
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@return Path in all other instances.
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**/
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CHAR16*
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EFIAPI
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PathCleanUpDirectories(
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IN CHAR16 *Path
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)
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{
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CHAR16 *TempString;
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UINTN TempSize;
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if (Path==NULL) {
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return(NULL);
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}
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//
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// Fix up the '/' vs '\'
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//
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for (TempString = Path ; TempString != NULL && *TempString != CHAR_NULL ; TempString++) {
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if (*TempString == L'/') {
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*TempString = L'\\';
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}
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}
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//
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// Fix up the ..
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//
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while ((TempString = StrStr(Path, L"\\..\\")) != NULL) {
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*TempString = CHAR_NULL;
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TempString += 4;
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PathRemoveLastItem(Path);
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TempSize = StrSize(TempString);
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CopyMem(Path+StrLen(Path), TempString, TempSize);
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}
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if ((TempString = StrStr(Path, L"\\..")) != NULL && *(TempString + 3) == CHAR_NULL) {
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*TempString = CHAR_NULL;
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PathRemoveLastItem(Path);
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}
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//
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// Fix up the .
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//
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while ((TempString = StrStr(Path, L"\\.\\")) != NULL) {
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*TempString = CHAR_NULL;
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TempString += 2;
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TempSize = StrSize(TempString);
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CopyMem(Path+StrLen(Path), TempString, TempSize);
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}
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if ((TempString = StrStr(Path, L"\\.")) != NULL && *(TempString + 2) == CHAR_NULL) {
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*(TempString + 1) = CHAR_NULL;
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}
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while ((TempString = StrStr(Path, L"\\\\")) != NULL) {
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*TempString = CHAR_NULL;
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TempString += 1;
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TempSize = StrSize(TempString);
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CopyMem(Path+StrLen(Path), TempString, TempSize);
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}
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if ((TempString = StrStr(Path, L"\\\\")) != NULL && *(TempString + 1) == CHAR_NULL) {
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*(TempString) = CHAR_NULL;
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}
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return (Path);
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}
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