Sync/gnu-efi/lib/boxdraw.c
Curle d588e232c4 Major overhaul of this branch.
This branch has been dedicated to purely the UEFI bootloader.
As such, all other code has been removed.

This code can be compiled with Visual Studio, gcc or llvm.
2019-07-17 21:10:29 +01:00

174 lines
4.9 KiB
C

/*++
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, 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) {
*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;
}