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, L'\0' } 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 } 173 174