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/*++ |
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Copyright (c) 1998 Intel Corporation |
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Module Name: |
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BoxDraw.c |
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Abstract: |
Lib functions to support Box Draw Unicode code pages. |
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Revision History |
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--*/ |
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#include "lib.h" |
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typedef struct { |
CHAR16 Unicode; |
CHAR8 PcAnsi; |
CHAR8 Ascii; |
} UNICODE_TO_CHAR; |
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// |
// 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. |
// |
// |
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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'+'}, |
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{ BLOCKELEMENT_FULL_BLOCK, 0xdb, L'*'}, |
{ BLOCKELEMENT_LIGHT_SHADE, 0xb0, L'+'}, |
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{ GEOMETRICSHAPE_UP_TRIANGLE, 0x1e, L'^'}, |
{ GEOMETRICSHAPE_RIGHT_TRIANGLE, 0x10, L'>'}, |
{ GEOMETRICSHAPE_DOWN_TRIANGLE, 0x1f, L'v'}, |
{ GEOMETRICSHAPE_LEFT_TRIANGLE, 0x11, L'<'}, |
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/* 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. |
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{ ARROW_LEFT, 0x1b, L'<'}, |
*/ |
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{ ARROW_UP, 0x18, L'^'}, |
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/* BugBut: Took out left arrow so right has to go too. |
{ ARROW_RIGHT, 0x1a, L'>'}, |
*/ |
{ ARROW_DOWN, 0x19, L'v'}, |
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{ 0x0000, 0x00 } |
}; |
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BOOLEAN |
LibIsValidTextGraphics ( |
IN CHAR16 Graphic, |
OUT CHAR8 *PcAnsi, OPTIONAL |
OUT CHAR8 *Ascii OPTIONAL |
) |
/*++ |
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Routine Description: |
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Detects if a Unicode char is for Box Drawing text graphics. |
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Arguments: |
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Grphic - Unicode char to test. |
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PcAnsi - Optional pointer to return PCANSI equivalent of Graphic. |
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Asci - Optional pointer to return Ascii equivalent of Graphic. |
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Returns: |
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TRUE if Gpaphic is a supported Unicode Box Drawing character. |
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--*/{ |
UNICODE_TO_CHAR *Table; |
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if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) { |
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// |
// Unicode drawing code charts are all in the 0x25xx range, |
// arrows are 0x21xx |
// |
return FALSE; |
} |
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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; |
} |
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BOOLEAN |
IsValidAscii ( |
IN CHAR16 Ascii |
) |
{ |
if ((Ascii >= 0x20) && (Ascii <= 0x7f)) { |
return TRUE; |
} |
return FALSE; |
} |
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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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