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/*++
Copyright (c) 1998 Intel Corporation
Module Name:
BoxDraw.c
Abstract:
Lib functions to support Box Draw Unicode code pages.
Revision History
--*/
#include "lib.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'<'},
/* BugBug: Left Arrow is an ESC. We can not make it print
on a PCANSI terminal. If we can make left arrow
come out on PC ANSI we can add it back.
{ ARROW_LEFT, 0x1b, L'<'},
*/
{ ARROW_UP, 0x18, L'^'},
/* BugBut: Took out left arrow so right has to go too.
{ ARROW_RIGHT, 0x1a, L'>'},
*/
{ ARROW_DOWN, 0x19, L'v'},
{ 0x0000, 0x00 }
};
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) {
*PcAnsi = Table->PcAnsi;
}
if (Ascii) {
*Ascii = Table->Ascii;
}
return TRUE;
}
}
return FALSE;
}
BOOLEAN
IsValidAscii (
IN CHAR16 Ascii
)
{
if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
return TRUE;
}
return FALSE;
}
BOOLEAN
IsValidEfiCntlChar (
IN CHAR16 c
)
{
if (c == CHAR_NULL || c == CHAR_BACKSPACE || c == CHAR_LINEFEED || c == CHAR_CARRIAGE_RETURN) {
return TRUE;
}
return FALSE;
}
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