static BOOL
seta_identval ( LPCTSTR ident, INT* result )
{
LPCTSTR identVal = GetEnvVarOrSpecial ( ident );
if ( !identVal )
{
/* TODO FIXME - what to do upon failure? */
*result = 0;
return FALSE;
}
*result = _tcstol ( identVal, NULL, 0 );
return TRUE;
}
INT ExecuteIf(PARSED_COMMAND *Cmd)
{
INT result = FALSE; /* when set cause 'then' clause to be executed */
LPTSTR param;
LPTSTR Left = NULL, Right;
if (Cmd->If.LeftArg)
{
Left = DoDelayedExpansion(Cmd->If.LeftArg);
if (!Left)
return 1;
}
Right = DoDelayedExpansion(Cmd->If.RightArg);
if (!Right)
{
cmd_free(Left);
return 1;
}
if (Cmd->If.Operator == IF_CMDEXTVERSION)
{
/* IF CMDEXTVERSION n: check if Command Extensions version
* is greater or equal to n */
DWORD n = _tcstoul(Right, ¶m, 10);
if (*param != _T('\0'))
{
error_syntax(Right);
cmd_free(Right);
return 1;
}
result = (2 >= n);
}
else if (Cmd->If.Operator == IF_DEFINED)
{
/* IF DEFINED var: check if environment variable exists */
result = (GetEnvVarOrSpecial(Right) != NULL);
}
else if (Cmd->If.Operator == IF_ERRORLEVEL)
{
/* IF ERRORLEVEL n: check if last exit code is greater or equal to n */
INT n = _tcstol(Right, ¶m, 10);
if (*param != _T('\0'))
{
error_syntax(Right);
cmd_free(Right);
return 1;
}
result = (nErrorLevel >= n);
}
else if (Cmd->If.Operator == IF_EXIST)
{
BOOL IsDir;
INT Size;
WIN32_FIND_DATA f;
HANDLE hFind;
/* IF EXIST filename: check if file exists (wildcards allowed) */
StripQuotes(Right);
Size = _tcslen(Right);
IsDir = (Right[Size - 1] == '\\');
if (IsDir)
Right[Size - 1] = 0;
hFind = FindFirstFile(Right, &f);
if (hFind != INVALID_HANDLE_VALUE)
{
if (IsDir)
{
result = ((f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY);
}
else
{
result = TRUE;
}
FindClose(hFind);
}
if (IsDir)
Right[Size - 1] = '\\';
}
else
{
/* Do case-insensitive string comparisons if /I specified */
INT (*StringCmp)(LPCTSTR, LPCTSTR) =
(Cmd->If.Flags & IFFLAG_IGNORECASE) ? _tcsicmp : _tcscmp;
if (Cmd->If.Operator == IF_STRINGEQ)
{
/* IF str1 == str2 */
result = StringCmp(Left, Right) == 0;
}
else
{
result = GenericCmp(StringCmp, Left, Right);
switch (Cmd->If.Operator)
{
case IF_EQU: result = (result == 0); break;
case IF_NEQ: result = (result != 0); break;
case IF_LSS: result = (result < 0); break;
case IF_LEQ: result = (result <= 0); break;
case IF_GTR: result = (result > 0); break;
case IF_GEQ: result = (result >= 0); break;
}
}
}
cmd_free(Left);
cmd_free(Right);
if (result ^ ((Cmd->If.Flags & IFFLAG_NEGATE) != 0))
{
/* full condition was true, do the command */
return ExecuteCommand(Cmd->Subcommands);
}
else
{
/* full condition was false, do the "else" command if there is one */
if (Cmd->Subcommands->Next)
return ExecuteCommand(Cmd->Subcommands->Next);
return 0;
}
}
