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Viewing changes to boot/arch/ia64/loader/gefi/lib/boxdraw.c

  • Committer: Martin Decky
  • Date: 2009-08-04 11:19:19 UTC
  • Revision ID: martin@uranus.dsrg.hide.ms.mff.cuni.cz-20090804111919-evyclddlr3v5lhmp
Initial import

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boot/arch/ia64/loader/gefi/lib/boxdraw.c
 
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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:
 
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    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 {
 
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    CHAR16  Unicode;
 
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    CHAR8   PcAnsi;
 
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    CHAR8   Ascii;
 
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} UNICODE_TO_CHAR;
 
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//
 
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// This list is used to define the valid extend chars.
 
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// It also provides a mapping from Unicode to PCANSI or
 
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// ASCII. The ASCII mapping we just made up.
 
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//
 
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//
 
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STATIC UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
 
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    { BOXDRAW_HORIZONTAL,                 0xc4, L'-'}, 
 
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    { BOXDRAW_VERTICAL,                   0xb3, L'|'},
 
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    { BOXDRAW_DOWN_RIGHT,                 0xda, L'/'},
 
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    { BOXDRAW_DOWN_LEFT,                  0xbf, L'\\'},
 
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    { BOXDRAW_UP_RIGHT,                   0xc0, L'\\'},
 
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    { BOXDRAW_UP_LEFT,                    0xd9, L'/'},
 
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    { BOXDRAW_VERTICAL_RIGHT,             0xc3, L'|'},
 
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    { BOXDRAW_VERTICAL_LEFT,              0xb4, L'|'},
 
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    { BOXDRAW_DOWN_HORIZONTAL,            0xc2, L'+'},
 
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    { BOXDRAW_UP_HORIZONTAL,              0xc1, L'+'},
 
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    { BOXDRAW_VERTICAL_HORIZONTAL,        0xc5, L'+'},
 
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    { BOXDRAW_DOUBLE_HORIZONTAL,          0xcd, L'-'},
 
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    { BOXDRAW_DOUBLE_VERTICAL,            0xba, L'|'},
 
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    { BOXDRAW_DOWN_RIGHT_DOUBLE,          0xd5, L'/'},
 
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    { BOXDRAW_DOWN_DOUBLE_RIGHT,          0xd6, L'/'},
 
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    { BOXDRAW_DOUBLE_DOWN_RIGHT,          0xc9, L'/'},
 
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    { BOXDRAW_DOWN_LEFT_DOUBLE,           0xb8, L'\\'},
 
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    { BOXDRAW_DOWN_DOUBLE_LEFT,           0xb7, L'\\'},
 
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    { BOXDRAW_DOUBLE_DOWN_LEFT,           0xbb, L'\\'},
 
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    { BOXDRAW_UP_RIGHT_DOUBLE,            0xd4, L'\\'},
 
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    { BOXDRAW_UP_DOUBLE_RIGHT,            0xd3, L'\\'},
 
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    { BOXDRAW_DOUBLE_UP_RIGHT,            0xc8, L'\\'},
 
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    { BOXDRAW_UP_LEFT_DOUBLE,             0xbe, L'/'},
 
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    { BOXDRAW_UP_DOUBLE_LEFT,             0xbd, L'/'},
 
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    { BOXDRAW_DOUBLE_UP_LEFT,             0xbc, L'/'},
 
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    { BOXDRAW_VERTICAL_RIGHT_DOUBLE,      0xc6, L'|'},
 
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    { BOXDRAW_VERTICAL_DOUBLE_RIGHT,      0xc7, L'|'},
 
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    { BOXDRAW_DOUBLE_VERTICAL_RIGHT,      0xcc, L'|'},
 
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    { BOXDRAW_VERTICAL_LEFT_DOUBLE,       0xb5, L'|'},
 
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    { BOXDRAW_VERTICAL_DOUBLE_LEFT,       0xb6, L'|'},
 
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    { BOXDRAW_DOUBLE_VERTICAL_LEFT,       0xb9, L'|'},
 
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    { BOXDRAW_DOWN_HORIZONTAL_DOUBLE,     0xd1, L'+'},
 
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    { BOXDRAW_DOWN_DOUBLE_HORIZONTAL,     0xd2, L'+'},
 
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    { BOXDRAW_DOUBLE_DOWN_HORIZONTAL,     0xcb, L'+'},
 
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    { BOXDRAW_UP_HORIZONTAL_DOUBLE,       0xcf, L'+'},
 
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    { BOXDRAW_UP_DOUBLE_HORIZONTAL,       0xd0, L'+'},
 
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    { BOXDRAW_DOUBLE_UP_HORIZONTAL,       0xca, L'+'},
 
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    { BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+'},
 
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    { BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+'},
 
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    { BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+'},
 
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    { BLOCKELEMENT_FULL_BLOCK,            0xdb, L'*'},
 
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    { BLOCKELEMENT_LIGHT_SHADE,           0xb0, L'+'},
 
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    { GEOMETRICSHAPE_UP_TRIANGLE,         0x1e, L'^'},
 
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    { GEOMETRICSHAPE_RIGHT_TRIANGLE,      0x10, L'>'},
 
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    { GEOMETRICSHAPE_DOWN_TRIANGLE,       0x1f, L'v'},
 
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    { GEOMETRICSHAPE_LEFT_TRIANGLE,       0x11, L'<'},
 
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    /* BugBug: Left Arrow is an ESC. We can not make it print
 
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                on a PCANSI terminal. If we can make left arrow 
 
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                come out on PC ANSI we can add it back.
 
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    { ARROW_LEFT,                         0x1b, L'<'},
 
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    */
 
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    { ARROW_UP,                           0x18, L'^'},
 
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    /* BugBut: Took out left arrow so right has to go too.
 
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       { ARROW_RIGHT,                        0x1a, L'>'},
 
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    */      
 
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    { ARROW_DOWN,                         0x19, L'v'},
 
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    { 0x0000, 0x00 }
 
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};
 
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BOOLEAN
 
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LibIsValidTextGraphics (
 
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    IN  CHAR16  Graphic,
 
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    OUT CHAR8   *PcAnsi,    OPTIONAL
 
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    OUT CHAR8   *Ascii      OPTIONAL
 
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    )
 
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/*++
 
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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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--*/{
 
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    UNICODE_TO_CHAR     *Table;
 
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    if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
 
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        //
 
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        // Unicode drawing code charts are all in the 0x25xx range, 
 
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        //  arrows are 0x21xx
 
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        //
 
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        return FALSE;
 
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    }
 
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    for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
 
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        if (Graphic == Table->Unicode) {
 
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            if (PcAnsi) {
 
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                *PcAnsi = Table->PcAnsi; 
 
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            }
 
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            if (Ascii) {
 
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                *Ascii = Table->Ascii;
 
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            }
 
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            return TRUE;
 
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        }
 
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    }
 
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    return FALSE;
 
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}
 
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BOOLEAN
 
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IsValidAscii (
 
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    IN  CHAR16  Ascii
 
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    )
 
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{
 
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    if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
 
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        return TRUE;
 
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    }              
 
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    return FALSE;
 
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}
 
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BOOLEAN
 
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IsValidEfiCntlChar (
 
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    IN  CHAR16  c
 
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    )
 
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{
 
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    if (c == CHAR_NULL || c == CHAR_BACKSPACE || c == CHAR_LINEFEED || c == CHAR_CARRIAGE_RETURN) {
 
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        return TRUE;
 
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    }              
 
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    return FALSE;
 
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}
 
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