lib/boxdraw.c

   1 /*++
   2
   3 Copyright (c) 1998  Intel Corporation
   4
   5 Module Name:
   6
   7     BoxDraw.c
   8
   9 Abstract:
  10     Lib functions to support Box Draw Unicode code pages.
  11
  12
  13
  14 Revision History
  15
  16 --*/
  17
  18 #include "lib.h"
  19
  20 typedef struct {
  21     CHAR16  Unicode;
  22     CHAR8   PcAnsi;
  23     CHAR8   Ascii;
  24 } UNICODE_TO_CHAR;
  25
  26
  27 //
  28 // This list is used to define the valid extend chars.
  29 // It also provides a mapping from Unicode to PCANSI or
  30 // ASCII. The ASCII mapping we just made up.
  31 //
  32 //
  33
  34 STATIC UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
  35     { BOXDRAW_HORIZONTAL,                 0xc4, L'-'},
  36     { BOXDRAW_VERTICAL,                   0xb3, L'|'},
  37     { BOXDRAW_DOWN_RIGHT,                 0xda, L'/'},
  38     { BOXDRAW_DOWN_LEFT,                  0xbf, L'\\'},
  39     { BOXDRAW_UP_RIGHT,                   0xc0, L'\\'},
  40     { BOXDRAW_UP_LEFT,                    0xd9, L'/'},
  41     { BOXDRAW_VERTICAL_RIGHT,             0xc3, L'|'},
  42     { BOXDRAW_VERTICAL_LEFT,              0xb4, L'|'},
  43     { BOXDRAW_DOWN_HORIZONTAL,            0xc2, L'+'},
  44     { BOXDRAW_UP_HORIZONTAL,              0xc1, L'+'},
  45     { BOXDRAW_VERTICAL_HORIZONTAL,        0xc5, L'+'},
  46     { BOXDRAW_DOUBLE_HORIZONTAL,          0xcd, L'-'},
  47     { BOXDRAW_DOUBLE_VERTICAL,            0xba, L'|'},
  48     { BOXDRAW_DOWN_RIGHT_DOUBLE,          0xd5, L'/'},
  49     { BOXDRAW_DOWN_DOUBLE_RIGHT,          0xd6, L'/'},
  50     { BOXDRAW_DOUBLE_DOWN_RIGHT,          0xc9, L'/'},
  51     { BOXDRAW_DOWN_LEFT_DOUBLE,           0xb8, L'\\'},
  52     { BOXDRAW_DOWN_DOUBLE_LEFT,           0xb7, L'\\'},
  53     { BOXDRAW_DOUBLE_DOWN_LEFT,           0xbb, L'\\'},
  54     { BOXDRAW_UP_RIGHT_DOUBLE,            0xd4, L'\\'},
  55     { BOXDRAW_UP_DOUBLE_RIGHT,            0xd3, L'\\'},
  56     { BOXDRAW_DOUBLE_UP_RIGHT,            0xc8, L'\\'},
  57     { BOXDRAW_UP_LEFT_DOUBLE,             0xbe, L'/'},
  58     { BOXDRAW_UP_DOUBLE_LEFT,             0xbd, L'/'},
  59     { BOXDRAW_DOUBLE_UP_LEFT,             0xbc, L'/'},
  60     { BOXDRAW_VERTICAL_RIGHT_DOUBLE,      0xc6, L'|'},
  61     { BOXDRAW_VERTICAL_DOUBLE_RIGHT,      0xc7, L'|'},
  62     { BOXDRAW_DOUBLE_VERTICAL_RIGHT,      0xcc, L'|'},
  63     { BOXDRAW_VERTICAL_LEFT_DOUBLE,       0xb5, L'|'},
  64     { BOXDRAW_VERTICAL_DOUBLE_LEFT,       0xb6, L'|'},
  65     { BOXDRAW_DOUBLE_VERTICAL_LEFT,       0xb9, L'|'},
  66     { BOXDRAW_DOWN_HORIZONTAL_DOUBLE,     0xd1, L'+'},
  67     { BOXDRAW_DOWN_DOUBLE_HORIZONTAL,     0xd2, L'+'},
  68     { BOXDRAW_DOUBLE_DOWN_HORIZONTAL,     0xcb, L'+'},
  69     { BOXDRAW_UP_HORIZONTAL_DOUBLE,       0xcf, L'+'},
  70     { BOXDRAW_UP_DOUBLE_HORIZONTAL,       0xd0, L'+'},
  71     { BOXDRAW_DOUBLE_UP_HORIZONTAL,       0xca, L'+'},
  72     { BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+'},
  73     { BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+'},
  74     { BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+'},
  75
  76     { BLOCKELEMENT_FULL_BLOCK,            0xdb, L'*'},
  77     { BLOCKELEMENT_LIGHT_SHADE,           0xb0, L'+'},
  78
  79     { GEOMETRICSHAPE_UP_TRIANGLE,         0x1e, L'^'},
  80     { GEOMETRICSHAPE_RIGHT_TRIANGLE,      0x10, L'>'},
  81     { GEOMETRICSHAPE_DOWN_TRIANGLE,       0x1f, L'v'},
  82     { GEOMETRICSHAPE_LEFT_TRIANGLE,       0x11, L'<'},
  83
  84     /* BugBug: Left Arrow is an ESC. We can not make it print
  85                 on a PCANSI terminal. If we can make left arrow
  86                 come out on PC ANSI we can add it back.
  87
  88     { ARROW_LEFT,                         0x1b, L'<'},
  89     */
  90
  91     { ARROW_UP,                           0x18, L'^'},
  92
  93     /* BugBut: Took out left arrow so right has to go too.
  94        { ARROW_RIGHT,                        0x1a, L'>'},
  95     */
  96     { ARROW_DOWN,                         0x19, L'v'},
  97
  98     { 0x0000, 0x00 }
  99 };
 100
 101
 102 BOOLEAN
 103 LibIsValidTextGraphics (
 104     IN  CHAR16  Graphic,
 105     OUT CHAR8   *PcAnsi,    OPTIONAL
 106     OUT CHAR8   *Ascii      OPTIONAL
 107     )
 108 /*++
 109
 110 Routine Description:
 111
 112     Detects if a Unicode char is for Box Drawing text graphics.
 113
 114 Arguments:
 115
 116     Grphic  - Unicode char to test.
 117
 118     PcAnsi  - Optional pointer to return PCANSI equivalent of Graphic.
 119
 120     Asci    - Optional pointer to return Ascii equivalent of Graphic.
 121
 122 Returns:
 123
 124     TRUE if Gpaphic is a supported Unicode Box Drawing character.
 125
 126 --*/{
 127     UNICODE_TO_CHAR     *Table;
 128
 129     if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
 130
 131         //
 132         // Unicode drawing code charts are all in the 0x25xx range,
 133         //  arrows are 0x21xx
 134         //
 135         return FALSE;
 136     }
 137
 138     for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
 139         if (Graphic == Table->Unicode) {
 140             if (PcAnsi) {
 141                 *PcAnsi = Table->PcAnsi;
 142             }
 143             if (Ascii) {
 144                 *Ascii = Table->Ascii;
 145             }
 146             return TRUE;
 147         }
 148     }
 149     return FALSE;
 150 }
 151
 152 BOOLEAN
 153 IsValidAscii (
 154     IN  CHAR16  Ascii
 155     )
 156 {
 157     if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
 158         return TRUE;
 159     }
 160     return FALSE;
 161 }
 162
 163 BOOLEAN
 164 IsValidEfiCntlChar (
 165     IN  CHAR16  c
 166     )
 167 {
 168     if (c == CHAR_NULL || c == CHAR_BACKSPACE || c == CHAR_LINEFEED || c == CHAR_CARRIAGE_RETURN) {
 169         return TRUE;
 170     }
 171     return FALSE;
 172 }
 173