mirror of
https://github.com/reactos/reactos.git
synced 2025-01-11 16:51:06 +00:00
510 lines
11 KiB
C
510 lines
11 KiB
C
/* $Id$
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/kernel32/misc/env.c
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* PURPOSE: Environment functions
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* PROGRAMMER: Ariadne ( ariadne@xs4all.nl)
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* UPDATE HISTORY:
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* Created 01/11/98
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*/
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#include <k32.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ******************************************************************/
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/*
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* @implemented
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*/
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DWORD
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WINAPI
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GetEnvironmentVariableA (
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LPCSTR lpName,
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LPSTR lpBuffer,
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DWORD nSize
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)
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{
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ANSI_STRING VarName;
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ANSI_STRING VarValue;
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UNICODE_STRING VarNameU;
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UNICODE_STRING VarValueU;
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NTSTATUS Status;
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/* initialize unicode variable name string */
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RtlInitAnsiString (&VarName,
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(LPSTR)lpName);
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RtlAnsiStringToUnicodeString (&VarNameU,
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&VarName,
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TRUE);
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/* initialize ansi variable value string */
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VarValue.Length = 0;
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VarValue.MaximumLength = (USHORT)nSize;
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VarValue.Buffer = lpBuffer;
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/* initialize unicode variable value string and allocate buffer */
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VarValueU.Length = 0;
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if (nSize != 0)
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{
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VarValueU.MaximumLength = (USHORT)(nSize - 1) * sizeof(WCHAR);
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VarValueU.Buffer = RtlAllocateHeap (RtlGetProcessHeap (),
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0,
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nSize * sizeof(WCHAR));
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if (VarValueU.Buffer != NULL)
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{
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/* NULL-terminate the buffer in any case! RtlQueryEnvironmentVariable_U
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only terminates it if MaximumLength < Length! */
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VarValueU.Buffer[nSize - 1] = L'\0';
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}
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}
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else
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{
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VarValueU.MaximumLength = 0;
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VarValueU.Buffer = NULL;
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}
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if (VarValueU.Buffer != NULL || nSize == 0)
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{
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/* get unicode environment variable */
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Status = RtlQueryEnvironmentVariable_U (NULL,
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&VarNameU,
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&VarValueU);
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if (!NT_SUCCESS(Status))
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{
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/* free unicode buffer */
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RtlFreeHeap (RtlGetProcessHeap (),
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0,
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VarValueU.Buffer);
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/* free unicode variable name string */
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RtlFreeUnicodeString (&VarNameU);
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SetLastErrorByStatus (Status);
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if (Status == STATUS_BUFFER_TOO_SMALL)
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{
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return (VarValueU.Length / sizeof(WCHAR)) + 1;
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}
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else
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{
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return 0;
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}
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}
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/* convert unicode value string to ansi */
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RtlUnicodeStringToAnsiString (&VarValue,
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&VarValueU,
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FALSE);
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if (VarValueU.Buffer != NULL)
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{
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/* free unicode buffer */
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RtlFreeHeap (RtlGetProcessHeap (),
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0,
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VarValueU.Buffer);
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}
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/* free unicode variable name string */
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RtlFreeUnicodeString (&VarNameU);
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return (VarValueU.Length / sizeof(WCHAR));
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}
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else
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{
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SetLastError (ERROR_NOT_ENOUGH_MEMORY);
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return 0;
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}
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}
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/*
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* @implemented
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*/
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DWORD
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WINAPI
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GetEnvironmentVariableW (
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LPCWSTR lpName,
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LPWSTR lpBuffer,
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DWORD nSize
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)
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{
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UNICODE_STRING VarName;
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UNICODE_STRING VarValue;
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NTSTATUS Status;
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RtlInitUnicodeString (&VarName,
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lpName);
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VarValue.Length = 0;
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VarValue.MaximumLength = (USHORT) (nSize ? nSize - 1 : 0) * sizeof(WCHAR);
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VarValue.Buffer = lpBuffer;
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Status = RtlQueryEnvironmentVariable_U (NULL,
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&VarName,
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&VarValue);
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if (!NT_SUCCESS(Status))
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{
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if (Status == STATUS_BUFFER_TOO_SMALL)
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{
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return (VarValue.Length / sizeof(WCHAR)) + 1;
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}
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else
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{
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SetLastErrorByStatus (Status);
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return 0;
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}
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}
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if (nSize != 0)
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{
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/* make sure the string is NULL-terminated! RtlQueryEnvironmentVariable_U
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only terminates it if MaximumLength < Length */
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lpBuffer[VarValue.Length / sizeof(WCHAR)] = L'\0';
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}
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return (VarValue.Length / sizeof(WCHAR));
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}
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/*
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* @implemented
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*/
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BOOL
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WINAPI
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SetEnvironmentVariableA (
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LPCSTR lpName,
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LPCSTR lpValue
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)
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{
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ANSI_STRING VarName;
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ANSI_STRING VarValue;
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UNICODE_STRING VarNameU;
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UNICODE_STRING VarValueU;
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NTSTATUS Status;
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DPRINT("SetEnvironmentVariableA(Name '%s', Value '%s')\n", lpName, lpValue);
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RtlInitAnsiString (&VarName,
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(LPSTR)lpName);
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RtlAnsiStringToUnicodeString (&VarNameU,
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&VarName,
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TRUE);
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if (lpValue)
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{
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RtlInitAnsiString (&VarValue,
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(LPSTR)lpValue);
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RtlAnsiStringToUnicodeString (&VarValueU,
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&VarValue,
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TRUE);
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Status = RtlSetEnvironmentVariable (NULL,
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&VarNameU,
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&VarValueU);
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RtlFreeUnicodeString (&VarValueU);
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}
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else
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{
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Status = RtlSetEnvironmentVariable (NULL,
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&VarNameU,
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NULL);
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}
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RtlFreeUnicodeString (&VarNameU);
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if (!NT_SUCCESS(Status))
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{
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SetLastErrorByStatus (Status);
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return FALSE;
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}
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return TRUE;
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}
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/*
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* @implemented
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*/
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BOOL
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WINAPI
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SetEnvironmentVariableW (
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LPCWSTR lpName,
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LPCWSTR lpValue
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)
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{
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UNICODE_STRING VarName;
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UNICODE_STRING VarValue;
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NTSTATUS Status;
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DPRINT("SetEnvironmentVariableW(Name '%S', Value '%S')\n", lpName, lpValue);
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RtlInitUnicodeString (&VarName,
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lpName);
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RtlInitUnicodeString (&VarValue,
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lpValue);
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Status = RtlSetEnvironmentVariable (NULL,
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&VarName,
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&VarValue);
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if (!NT_SUCCESS(Status))
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{
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SetLastErrorByStatus (Status);
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return FALSE;
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}
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return TRUE;
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}
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/*
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* @implemented
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*/
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LPSTR
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WINAPI
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GetEnvironmentStringsA (
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VOID
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)
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{
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UNICODE_STRING UnicodeString;
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ANSI_STRING AnsiString;
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PWCHAR EnvU;
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PWCHAR PtrU;
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ULONG Length;
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PCHAR EnvPtr = NULL;
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EnvU = (PWCHAR)(NtCurrentPeb ()->ProcessParameters->Environment);
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if (EnvU == NULL)
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return NULL;
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if (*EnvU == 0)
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return NULL;
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/* get environment size */
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PtrU = EnvU;
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while (*PtrU)
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{
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while (*PtrU)
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PtrU++;
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PtrU++;
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}
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Length = (ULONG)(PtrU - EnvU);
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DPRINT("Length %lu\n", Length);
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/* allocate environment buffer */
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EnvPtr = RtlAllocateHeap (RtlGetProcessHeap (),
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0,
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Length + 1);
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if (EnvPtr == NULL)
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{
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return NULL;
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}
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DPRINT("EnvPtr %p\n", EnvPtr);
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/* convert unicode environment to ansi */
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UnicodeString.MaximumLength = (USHORT)Length * sizeof(WCHAR) + sizeof(WCHAR);
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UnicodeString.Buffer = EnvU;
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AnsiString.MaximumLength = (USHORT)Length + 1;
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AnsiString.Length = 0;
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AnsiString.Buffer = EnvPtr;
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DPRINT ("UnicodeString.Buffer \'%S\'\n", UnicodeString.Buffer);
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while (*(UnicodeString.Buffer))
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{
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UnicodeString.Length = wcslen (UnicodeString.Buffer) * sizeof(WCHAR);
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UnicodeString.MaximumLength = UnicodeString.Length + sizeof(WCHAR);
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if (UnicodeString.Length > 0)
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{
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AnsiString.Length = 0;
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AnsiString.MaximumLength = (USHORT)Length + 1 - (AnsiString.Buffer - EnvPtr);
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RtlUnicodeStringToAnsiString (&AnsiString,
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&UnicodeString,
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FALSE);
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AnsiString.Buffer += (AnsiString.Length + 1);
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UnicodeString.Buffer += ((UnicodeString.Length / sizeof(WCHAR)) + 1);
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}
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}
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*(AnsiString.Buffer) = 0;
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return EnvPtr;
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}
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/*
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* @implemented
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*/
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LPWSTR
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WINAPI
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GetEnvironmentStringsW (
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VOID
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)
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{
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return (LPWSTR)(NtCurrentPeb ()->ProcessParameters->Environment);
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}
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/*
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* @implemented
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*/
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BOOL
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WINAPI
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FreeEnvironmentStringsA (
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LPSTR EnvironmentStrings
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)
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{
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if (EnvironmentStrings == NULL)
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return FALSE;
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RtlFreeHeap (RtlGetProcessHeap (),
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0,
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EnvironmentStrings);
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return TRUE;
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}
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/*
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* @implemented
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*/
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BOOL
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WINAPI
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FreeEnvironmentStringsW (
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LPWSTR EnvironmentStrings
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)
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{
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return TRUE;
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}
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/*
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* @implemented
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*/
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DWORD
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WINAPI
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ExpandEnvironmentStringsA (
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LPCSTR lpSrc,
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LPSTR lpDst,
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DWORD nSize
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)
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{
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ANSI_STRING Source;
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ANSI_STRING Destination;
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UNICODE_STRING SourceU;
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UNICODE_STRING DestinationU;
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NTSTATUS Status;
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ULONG Length = 0;
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RtlInitAnsiString (&Source,
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(LPSTR)lpSrc);
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Status = RtlAnsiStringToUnicodeString (&SourceU,
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&Source,
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TRUE);
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if (!NT_SUCCESS(Status))
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{
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SetLastErrorByStatus (Status);
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return 0;
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}
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/* make sure we don't overflow the maximum ANSI_STRING size */
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if (nSize > 0x7fff)
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nSize = 0x7fff;
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Destination.Length = 0;
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Destination.MaximumLength = (USHORT)nSize;
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Destination.Buffer = lpDst;
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DestinationU.Length = 0;
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DestinationU.MaximumLength = (USHORT)nSize * sizeof(WCHAR);
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DestinationU.Buffer = RtlAllocateHeap (RtlGetProcessHeap (),
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0,
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DestinationU.MaximumLength);
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if (DestinationU.Buffer == NULL)
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{
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RtlFreeUnicodeString(&SourceU);
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return 0;
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}
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Status = RtlExpandEnvironmentStrings_U (NULL,
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&SourceU,
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&DestinationU,
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&Length);
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RtlFreeUnicodeString (&SourceU);
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if (!NT_SUCCESS(Status))
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{
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SetLastErrorByStatus (Status);
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if (Status != STATUS_BUFFER_TOO_SMALL)
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{
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RtlFreeHeap (RtlGetProcessHeap (),
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0,
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DestinationU.Buffer);
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return 0;
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}
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}
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RtlUnicodeStringToAnsiString (&Destination,
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&DestinationU,
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FALSE);
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RtlFreeHeap (RtlGetProcessHeap (),
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0,
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DestinationU.Buffer);
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return (Length / sizeof(WCHAR));
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}
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/*
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* @implemented
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*/
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DWORD
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WINAPI
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ExpandEnvironmentStringsW (
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LPCWSTR lpSrc,
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LPWSTR lpDst,
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DWORD nSize
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)
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{
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UNICODE_STRING Source;
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UNICODE_STRING Destination;
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NTSTATUS Status;
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ULONG Length = 0;
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RtlInitUnicodeString (&Source,
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(LPWSTR)lpSrc);
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/* make sure we don't overflow the maximum UNICODE_STRING size */
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if (nSize > 0x7fff)
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nSize = 0x7fff;
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Destination.Length = 0;
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Destination.MaximumLength = (USHORT)nSize * sizeof(WCHAR);
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Destination.Buffer = lpDst;
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Status = RtlExpandEnvironmentStrings_U (NULL,
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&Source,
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&Destination,
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&Length);
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if (!NT_SUCCESS(Status))
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{
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SetLastErrorByStatus (Status);
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if (Status != STATUS_BUFFER_TOO_SMALL)
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return 0;
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}
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return (Length / sizeof(WCHAR));
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}
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/* EOF */
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