/**
Determine if String is a valid representation for a time or date.
@param[in] String The pointer to the string to test.
@param[in] Char The delimeter character.
@param[in] Min The minimum value allowed.
@param[in] Max The maximum value allowed.
@param[in] MinusOk Whether negative numbers are permitted.
@retval TRUE String is a valid representation.
@retval FALSE String is invalid.
**/
BOOLEAN
EFIAPI
InternalIsTimeLikeString (
IN CONST CHAR16 *String,
IN CONST CHAR16 Char,
IN CONST UINTN Min,
IN CONST UINTN Max,
IN CONST BOOLEAN MinusOk
)
{
UINTN Count;
Count = 0;
if (MinusOk) {
//
// A single minus is ok.
//
if (*String == L'-') {
String++;
}
}
//
// the first char must be numeric.
//
if (!ShellIsDecimalDigitCharacter(*String)) {
return (FALSE);
}
//
// loop through the characters and use the lib function
//
for ( ; String != NULL && *String != CHAR_NULL ; String++){
if (*String == Char) {
Count++;
if (Count > Max) {
return (FALSE);
}
continue;
}
if (!ShellIsDecimalDigitCharacter(*String)) {
return (FALSE);
}
}
if (Count < Min) {
return (FALSE);
}
return (TRUE);
}
/**
Determine if a valid string is a valid number for the 'for' command.
@param[in] Number The pointer to the string representation of the number to test.
@retval TRUE The number is valid.
@retval FALSE The number is not valid.
**/
BOOLEAN
EFIAPI
ShellIsValidForNumber (
IN CONST CHAR16 *Number
)
{
if (Number == NULL || *Number == CHAR_NULL) {
return (FALSE);
}
if (*Number == L'-') {
Number++;
}
if (StrLen(Number) == 0) {
return (FALSE);
}
if (StrLen(Number) >= 7) {
if ((StrStr(Number, L" ") == NULL) || (((StrStr(Number, L" ") != NULL) && (StrStr(Number, L" ") - Number) >= 7))) {
return (FALSE);
}
}
if (!ShellIsDecimalDigitCharacter(*Number)) {
return (FALSE);
}
return (TRUE);
}
/**
Function for 'cls' command.
@param[in] ImageHandle Handle to the Image (NULL if Internal).
@param[in] SystemTable Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunCls (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
UINTN Background;
UINTN ForeColor;
CHAR16 *ProblemParam;
SHELL_STATUS ShellStatus;
CONST CHAR16 *Param1;
//
// Initialize variables
//
ShellStatus = SHELL_SUCCESS;
ProblemParam = NULL;
Background = 0;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
//
// parse the command line
//
Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
if (EFI_ERROR(Status)) {
if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
//
// check for "-?"
//
if (ShellCommandLineGetFlag(Package, L"-?")) {
ASSERT(FALSE);
} else {
//
// If there are 0 value parameters, clear sceen
//
Param1 = ShellCommandLineGetRawValue(Package, 1);
if (Param1 == NULL) {
//
// clear screen
//
gST->ConOut->ClearScreen (gST->ConOut);
} else if (ShellCommandLineGetCount(Package) > 2) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
if (ShellStrToUintn(Param1) > 7 || StrLen(Param1) > 1 || !ShellIsDecimalDigitCharacter(*Param1)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, Param1);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
switch (ShellStrToUintn(Param1)) {
case 0:
Background = EFI_BACKGROUND_BLACK;
break;
case 1:
Background = EFI_BACKGROUND_BLUE;
break;
case 2:
Background = EFI_BACKGROUND_GREEN;
break;
case 3:
Background = EFI_BACKGROUND_CYAN;
break;
case 4:
Background = EFI_BACKGROUND_RED;
break;
case 5:
Background = EFI_BACKGROUND_MAGENTA;
break;
case 6:
Background = EFI_BACKGROUND_BROWN;
break;
case 7:
Background = EFI_BACKGROUND_LIGHTGRAY;
break;
}
ForeColor = (~ShellStrToUintn(Param1)) & 0xF;
Status = gST->ConOut->SetAttribute (gST->ConOut, (ForeColor | Background) & 0x7F );
ASSERT_EFI_ERROR(Status);
Status = gST->ConOut->ClearScreen (gST->ConOut);
ASSERT_EFI_ERROR(Status);
}
}
}
}
//
// free the command line package
//
ShellCommandLineFreeVarList (Package);
//
// return the status
//
return (ShellStatus);
}