1 /* $NetBSD: boxdraw.c,v 1.1.1.2 2018/08/16 18:17:47 jmcneill Exp $ */
2
3 /*++
4
5 Copyright (c) 1998 Intel Corporation
6
7 Module Name:
8
9 BoxDraw.c
10
11 Abstract:
12 Lib functions to support Box Draw Unicode code pages.
13
14
15
16 Revision History
17
18 --*/
19
20 #include "lib.h"
21
22 typedef 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
36 STATIC 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
104 BOOLEAN
LibIsValidTextGraphics(IN CHAR16 Graphic,OUT CHAR8 * PcAnsi,OPTIONAL OUT CHAR8 * Ascii OPTIONAL)105 LibIsValidTextGraphics (
106 IN CHAR16 Graphic,
107 OUT CHAR8 *PcAnsi, OPTIONAL
108 OUT CHAR8 *Ascii OPTIONAL
109 )
110 /*++
111
112 Routine Description:
113
114 Detects if a Unicode char is for Box Drawing text graphics.
115
116 Arguments:
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
124 Returns:
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
154 BOOLEAN
IsValidAscii(IN CHAR16 Ascii)155 IsValidAscii (
156 IN CHAR16 Ascii
157 )
158 {
159 if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
160 return TRUE;
161 }
162 return FALSE;
163 }
164
165 BOOLEAN
IsValidEfiCntlChar(IN CHAR16 c)166 IsValidEfiCntlChar (
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