1/*++
2
3Copyright (c) 1998  Intel Corporation
4
5Module Name:
6
7    BoxDraw.c
8
9Abstract:
10    Lib functions to support Box Draw Unicode code pages.
11
12
13
14Revision History
15
16--*/
17
18#include "lib.h"
19
20typedef 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
34STATIC 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, L'\0' }
99};
100
101
102BOOLEAN
103LibIsValidTextGraphics (
104    IN  CHAR16  Graphic,
105    OUT CHAR8   *PcAnsi,    OPTIONAL
106    OUT CHAR8   *Ascii      OPTIONAL
107    )
108/*++
109
110Routine Description:
111
112    Detects if a Unicode char is for Box Drawing text graphics.
113
114Arguments:
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
122Returns:
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
152BOOLEAN
153IsValidAscii (
154    IN  CHAR16  Ascii
155    )
156{
157    if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
158        return TRUE;
159    }
160    return FALSE;
161}
162
163BOOLEAN
164IsValidEfiCntlChar (
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
174