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/*++
Copyright (c) 2004, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
BoxDraw.c
Abstract:
Lib functions to support Box Draw Unicode code pages.
Revision History
--*/
#include "Tiano.h"
#include "EfiDriverLib.h"
typedef struct {
CHAR16 Unicode;
CHAR8 PcAnsi;
CHAR8 Ascii;
} UNICODE_TO_CHAR;
//
// This list is used to define the valid extend chars.
// It also provides a mapping from Unicode to PCANSI or
// ASCII. The ASCII mapping we just made up.
//
//
static UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
{BOXDRAW_HORIZONTAL, 0xc4, L'-'},
{BOXDRAW_VERTICAL, 0xb3, L'|'},
{BOXDRAW_DOWN_RIGHT, 0xda, L'/'},
{BOXDRAW_DOWN_LEFT, 0xbf, L'\\'},
{BOXDRAW_UP_RIGHT, 0xc0, L'\\'},
{BOXDRAW_UP_LEFT, 0xd9, L'/'},
{BOXDRAW_VERTICAL_RIGHT, 0xc3, L'|'},
{BOXDRAW_VERTICAL_LEFT, 0xb4, L'|'},
{BOXDRAW_DOWN_HORIZONTAL, 0xc2, L'+'},
{BOXDRAW_UP_HORIZONTAL, 0xc1, L'+'},
{BOXDRAW_VERTICAL_HORIZONTAL, 0xc5, L'+'},
{BOXDRAW_DOUBLE_HORIZONTAL, 0xcd, L'-'},
{BOXDRAW_DOUBLE_VERTICAL, 0xba, L'|'},
{BOXDRAW_DOWN_RIGHT_DOUBLE, 0xd5, L'/'},
{BOXDRAW_DOWN_DOUBLE_RIGHT, 0xd6, L'/'},
{BOXDRAW_DOUBLE_DOWN_RIGHT, 0xc9, L'/'},
{BOXDRAW_DOWN_LEFT_DOUBLE, 0xb8, L'\\'},
{BOXDRAW_DOWN_DOUBLE_LEFT, 0xb7, L'\\'},
{BOXDRAW_DOUBLE_DOWN_LEFT, 0xbb, L'\\'},
{BOXDRAW_UP_RIGHT_DOUBLE, 0xd4, L'\\'},
{BOXDRAW_UP_DOUBLE_RIGHT, 0xd3, L'\\'},
{BOXDRAW_DOUBLE_UP_RIGHT, 0xc8, L'\\'},
{BOXDRAW_UP_LEFT_DOUBLE, 0xbe, L'/'},
{BOXDRAW_UP_DOUBLE_LEFT, 0xbd, L'/'},
{BOXDRAW_DOUBLE_UP_LEFT, 0xbc, L'/'},
{BOXDRAW_VERTICAL_RIGHT_DOUBLE, 0xc6, L'|'},
{BOXDRAW_VERTICAL_DOUBLE_RIGHT, 0xc7, L'|'},
{BOXDRAW_DOUBLE_VERTICAL_RIGHT, 0xcc, L'|'},
{BOXDRAW_VERTICAL_LEFT_DOUBLE, 0xb5, L'|'},
{BOXDRAW_VERTICAL_DOUBLE_LEFT, 0xb6, L'|'},
{BOXDRAW_DOUBLE_VERTICAL_LEFT, 0xb9, L'|'},
{BOXDRAW_DOWN_HORIZONTAL_DOUBLE, 0xd1, L'+'},
{BOXDRAW_DOWN_DOUBLE_HORIZONTAL, 0xd2, L'+'},
{BOXDRAW_DOUBLE_DOWN_HORIZONTAL, 0xcb, L'+'},
{BOXDRAW_UP_HORIZONTAL_DOUBLE, 0xcf, L'+'},
{BOXDRAW_UP_DOUBLE_HORIZONTAL, 0xd0, L'+'},
{BOXDRAW_DOUBLE_UP_HORIZONTAL, 0xca, L'+'},
{BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+'},
{BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+'},
{BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+'},
{BLOCKELEMENT_FULL_BLOCK, 0xdb, L'*'},
{BLOCKELEMENT_LIGHT_SHADE, 0xb0, L'+'},
{GEOMETRICSHAPE_UP_TRIANGLE, 0x1e, L'^'},
{GEOMETRICSHAPE_RIGHT_TRIANGLE, 0x10, L'>'},
{GEOMETRICSHAPE_DOWN_TRIANGLE, 0x1f, L'v'},
{GEOMETRICSHAPE_LEFT_TRIANGLE, 0x11, L'<'},
{ARROW_LEFT, 0x3c, L'<'},
{ARROW_UP, 0x18, L'^'},
{ARROW_RIGHT, 0x3e, L'>'},
{ARROW_DOWN, 0x19, L'v'},
{0x0000, 0x00, L'\0'},
};
BOOLEAN
LibIsValidTextGraphics (
IN CHAR16 Graphic,
OUT CHAR8 *PcAnsi, OPTIONAL
OUT CHAR8 *Ascii OPTIONAL
)
/*++
Routine Description:
Detects if a Unicode char is for Box Drawing text graphics.
Arguments:
Grphic - Unicode char to test.
PcAnsi - Optional pointer to return PCANSI equivalent of Graphic.
Asci - Optional pointer to return Ascii equivalent of Graphic.
Returns:
TRUE if Gpaphic is a supported Unicode Box Drawing character.
--*/
{
UNICODE_TO_CHAR *Table;
if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
//
// Unicode drawing code charts are all in the 0x25xx range,
// arrows are 0x21xx
//
return FALSE;
}
for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
if (Graphic == Table->Unicode) {
if (PcAnsi != NULL) {
*PcAnsi = Table->PcAnsi;
}
if (Ascii != NULL) {
*Ascii = Table->Ascii;
}
return TRUE;
}
}
return FALSE;
}
BOOLEAN
IsValidAscii (
IN CHAR16 Ascii
)
/*++
Routine Description:
Is it valid ascii char?
Arguments:
Ascii - The char to check
Returns:
TRUE - Is a ascii char
FALSE - Not a ascii char
--*/
{
if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
return TRUE;
}
return FALSE;
}
BOOLEAN
IsValidEfiCntlChar (
IN CHAR16 CharC
)
/*++
Routine Description:
Is it valid EFI control char?
Arguments:
Ascii - The char to check
Returns:
TRUE - Is a valid EFI control char
FALSE - Not a valid EFI control char
--*/
{
if (CharC == CHAR_NULL || CharC == CHAR_BACKSPACE || CharC == CHAR_LINEFEED || CharC == CHAR_CARRIAGE_RETURN) {
return TRUE;
}
return FALSE;
}
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