1/*	$NetBSD: boxdraw.c,v 1.1.1.2 2018/08/16 18:17:47 jmcneill Exp $	*/
2
3/*++
4
5Copyright (c) 1998  Intel Corporation
6
7Module Name:
8
9    BoxDraw.c
10
11Abstract:
12    Lib functions to support Box Draw Unicode code pages.
13
14
15
16Revision History
17
18--*/
19
20#include "lib.h"
21
22typedef struct {
23    CHAR16  Unicode;
24    CHAR8   PcAnsi;
25    CHAR8   Ascii;
26} UNICODE_TO_CHAR;
27
28
29//
30// This list is used to define the valid extend chars.
31// It also provides a mapping from Unicode to PCANSI or
32// ASCII. The ASCII mapping we just made up.
33//
34//
35
36STATIC UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
37    { BOXDRAW_HORIZONTAL,                 0xc4, L'-'},
38    { BOXDRAW_VERTICAL,                   0xb3, L'|'},
39    { BOXDRAW_DOWN_RIGHT,                 0xda, L'/'},
40    { BOXDRAW_DOWN_LEFT,                  0xbf, L'\\'},
41    { BOXDRAW_UP_RIGHT,                   0xc0, L'\\'},
42    { BOXDRAW_UP_LEFT,                    0xd9, L'/'},
43    { BOXDRAW_VERTICAL_RIGHT,             0xc3, L'|'},
44    { BOXDRAW_VERTICAL_LEFT,              0xb4, L'|'},
45    { BOXDRAW_DOWN_HORIZONTAL,            0xc2, L'+'},
46    { BOXDRAW_UP_HORIZONTAL,              0xc1, L'+'},
47    { BOXDRAW_VERTICAL_HORIZONTAL,        0xc5, L'+'},
48    { BOXDRAW_DOUBLE_HORIZONTAL,          0xcd, L'-'},
49    { BOXDRAW_DOUBLE_VERTICAL,            0xba, L'|'},
50    { BOXDRAW_DOWN_RIGHT_DOUBLE,          0xd5, L'/'},
51    { BOXDRAW_DOWN_DOUBLE_RIGHT,          0xd6, L'/'},
52    { BOXDRAW_DOUBLE_DOWN_RIGHT,          0xc9, L'/'},
53    { BOXDRAW_DOWN_LEFT_DOUBLE,           0xb8, L'\\'},
54    { BOXDRAW_DOWN_DOUBLE_LEFT,           0xb7, L'\\'},
55    { BOXDRAW_DOUBLE_DOWN_LEFT,           0xbb, L'\\'},
56    { BOXDRAW_UP_RIGHT_DOUBLE,            0xd4, L'\\'},
57    { BOXDRAW_UP_DOUBLE_RIGHT,            0xd3, L'\\'},
58    { BOXDRAW_DOUBLE_UP_RIGHT,            0xc8, L'\\'},
59    { BOXDRAW_UP_LEFT_DOUBLE,             0xbe, L'/'},
60    { BOXDRAW_UP_DOUBLE_LEFT,             0xbd, L'/'},
61    { BOXDRAW_DOUBLE_UP_LEFT,             0xbc, L'/'},
62    { BOXDRAW_VERTICAL_RIGHT_DOUBLE,      0xc6, L'|'},
63    { BOXDRAW_VERTICAL_DOUBLE_RIGHT,      0xc7, L'|'},
64    { BOXDRAW_DOUBLE_VERTICAL_RIGHT,      0xcc, L'|'},
65    { BOXDRAW_VERTICAL_LEFT_DOUBLE,       0xb5, L'|'},
66    { BOXDRAW_VERTICAL_DOUBLE_LEFT,       0xb6, L'|'},
67    { BOXDRAW_DOUBLE_VERTICAL_LEFT,       0xb9, L'|'},
68    { BOXDRAW_DOWN_HORIZONTAL_DOUBLE,     0xd1, L'+'},
69    { BOXDRAW_DOWN_DOUBLE_HORIZONTAL,     0xd2, L'+'},
70    { BOXDRAW_DOUBLE_DOWN_HORIZONTAL,     0xcb, L'+'},
71    { BOXDRAW_UP_HORIZONTAL_DOUBLE,       0xcf, L'+'},
72    { BOXDRAW_UP_DOUBLE_HORIZONTAL,       0xd0, L'+'},
73    { BOXDRAW_DOUBLE_UP_HORIZONTAL,       0xca, L'+'},
74    { BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+'},
75    { BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+'},
76    { BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+'},
77
78    { BLOCKELEMENT_FULL_BLOCK,            0xdb, L'*'},
79    { BLOCKELEMENT_LIGHT_SHADE,           0xb0, L'+'},
80
81    { GEOMETRICSHAPE_UP_TRIANGLE,         0x1e, L'^'},
82    { GEOMETRICSHAPE_RIGHT_TRIANGLE,      0x10, L'>'},
83    { GEOMETRICSHAPE_DOWN_TRIANGLE,       0x1f, L'v'},
84    { GEOMETRICSHAPE_LEFT_TRIANGLE,       0x11, L'<'},
85
86    /* BugBug: Left Arrow is an ESC. We can not make it print
87                on a PCANSI terminal. If we can make left arrow
88                come out on PC ANSI we can add it back.
89
90    { ARROW_LEFT,                         0x1b, L'<'},
91    */
92
93    { ARROW_UP,                           0x18, L'^'},
94
95    /* BugBut: Took out left arrow so right has to go too.
96       { ARROW_RIGHT,                        0x1a, L'>'},
97    */
98    { ARROW_DOWN,                         0x19, L'v'},
99
100    { 0x0000, 0x00, L'\0' }
101};
102
103
104BOOLEAN
105LibIsValidTextGraphics (
106    IN  CHAR16  Graphic,
107    OUT CHAR8   *PcAnsi,    OPTIONAL
108    OUT CHAR8   *Ascii      OPTIONAL
109    )
110/*++
111
112Routine Description:
113
114    Detects if a Unicode char is for Box Drawing text graphics.
115
116Arguments:
117
118    Grphic  - Unicode char to test.
119
120    PcAnsi  - Optional pointer to return PCANSI equivalent of Graphic.
121
122    Asci    - Optional pointer to return Ascii equivalent of Graphic.
123
124Returns:
125
126    TRUE if Gpaphic is a supported Unicode Box Drawing character.
127
128--*/{
129    UNICODE_TO_CHAR     *Table;
130
131    if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
132
133        //
134        // Unicode drawing code charts are all in the 0x25xx range,
135        //  arrows are 0x21xx
136        //
137        return FALSE;
138    }
139
140    for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
141        if (Graphic == Table->Unicode) {
142            if (PcAnsi) {
143                *PcAnsi = Table->PcAnsi;
144            }
145            if (Ascii) {
146                *Ascii = Table->Ascii;
147            }
148            return TRUE;
149        }
150    }
151    return FALSE;
152}
153
154BOOLEAN
155IsValidAscii (
156    IN  CHAR16  Ascii
157    )
158{
159    if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
160        return TRUE;
161    }
162    return FALSE;
163}
164
165BOOLEAN
166IsValidEfiCntlChar (
167    IN  CHAR16  c
168    )
169{
170    if (c == CHAR_NULL || c == CHAR_BACKSPACE || c == CHAR_LINEFEED || c == CHAR_CARRIAGE_RETURN) {
171        return TRUE;
172    }
173    return FALSE;
174}
175
176