/* $NetBSD: boxdraw.c,v 1.1.1.2 2018/08/16 18:17:47 jmcneill Exp $ */ /*++ Copyright (c) 1998 Intel Corporation Module Name: BoxDraw.c Abstract: Lib functions to support Box Draw Unicode code pages. Revision History --*/ #include "lib.h" typedef struct { CHAR16 Unicode; CHAR8 PcAnsi; CHAR8 Ascii; } UNICODE_TO_CHAR; // // This list is used to define the valid extend chars. // It also provides a mapping from Unicode to PCANSI or // ASCII. The ASCII mapping we just made up. // // STATIC UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = { { BOXDRAW_HORIZONTAL, 0xc4, L'-'}, { BOXDRAW_VERTICAL, 0xb3, L'|'}, { BOXDRAW_DOWN_RIGHT, 0xda, L'/'}, { BOXDRAW_DOWN_LEFT, 0xbf, L'\\'}, { BOXDRAW_UP_RIGHT, 0xc0, L'\\'}, { BOXDRAW_UP_LEFT, 0xd9, L'/'}, { BOXDRAW_VERTICAL_RIGHT, 0xc3, L'|'}, { BOXDRAW_VERTICAL_LEFT, 0xb4, L'|'}, { BOXDRAW_DOWN_HORIZONTAL, 0xc2, L'+'}, { BOXDRAW_UP_HORIZONTAL, 0xc1, L'+'}, { BOXDRAW_VERTICAL_HORIZONTAL, 0xc5, L'+'}, { BOXDRAW_DOUBLE_HORIZONTAL, 0xcd, L'-'}, { BOXDRAW_DOUBLE_VERTICAL, 0xba, L'|'}, { BOXDRAW_DOWN_RIGHT_DOUBLE, 0xd5, L'/'}, { BOXDRAW_DOWN_DOUBLE_RIGHT, 0xd6, L'/'}, { BOXDRAW_DOUBLE_DOWN_RIGHT, 0xc9, L'/'}, { BOXDRAW_DOWN_LEFT_DOUBLE, 0xb8, L'\\'}, { BOXDRAW_DOWN_DOUBLE_LEFT, 0xb7, L'\\'}, { BOXDRAW_DOUBLE_DOWN_LEFT, 0xbb, L'\\'}, { BOXDRAW_UP_RIGHT_DOUBLE, 0xd4, L'\\'}, { BOXDRAW_UP_DOUBLE_RIGHT, 0xd3, L'\\'}, { BOXDRAW_DOUBLE_UP_RIGHT, 0xc8, L'\\'}, { BOXDRAW_UP_LEFT_DOUBLE, 0xbe, L'/'}, { BOXDRAW_UP_DOUBLE_LEFT, 0xbd, L'/'}, { BOXDRAW_DOUBLE_UP_LEFT, 0xbc, L'/'}, { BOXDRAW_VERTICAL_RIGHT_DOUBLE, 0xc6, L'|'}, { BOXDRAW_VERTICAL_DOUBLE_RIGHT, 0xc7, L'|'}, { BOXDRAW_DOUBLE_VERTICAL_RIGHT, 0xcc, L'|'}, { BOXDRAW_VERTICAL_LEFT_DOUBLE, 0xb5, L'|'}, { BOXDRAW_VERTICAL_DOUBLE_LEFT, 0xb6, L'|'}, { BOXDRAW_DOUBLE_VERTICAL_LEFT, 0xb9, L'|'}, { BOXDRAW_DOWN_HORIZONTAL_DOUBLE, 0xd1, L'+'}, { BOXDRAW_DOWN_DOUBLE_HORIZONTAL, 0xd2, L'+'}, { BOXDRAW_DOUBLE_DOWN_HORIZONTAL, 0xcb, L'+'}, { BOXDRAW_UP_HORIZONTAL_DOUBLE, 0xcf, L'+'}, { BOXDRAW_UP_DOUBLE_HORIZONTAL, 0xd0, L'+'}, { BOXDRAW_DOUBLE_UP_HORIZONTAL, 0xca, L'+'}, { BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+'}, { BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+'}, { BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+'}, { BLOCKELEMENT_FULL_BLOCK, 0xdb, L'*'}, { BLOCKELEMENT_LIGHT_SHADE, 0xb0, L'+'}, { GEOMETRICSHAPE_UP_TRIANGLE, 0x1e, L'^'}, { GEOMETRICSHAPE_RIGHT_TRIANGLE, 0x10, L'>'}, { GEOMETRICSHAPE_DOWN_TRIANGLE, 0x1f, L'v'}, { GEOMETRICSHAPE_LEFT_TRIANGLE, 0x11, L'<'}, /* BugBug: Left Arrow is an ESC. We can not make it print on a PCANSI terminal. If we can make left arrow come out on PC ANSI we can add it back. { ARROW_LEFT, 0x1b, L'<'}, */ { ARROW_UP, 0x18, L'^'}, /* BugBut: Took out left arrow so right has to go too. { ARROW_RIGHT, 0x1a, L'>'}, */ { ARROW_DOWN, 0x19, L'v'}, { 0x0000, 0x00, L'\0' } }; BOOLEAN LibIsValidTextGraphics ( IN CHAR16 Graphic, OUT CHAR8 *PcAnsi, OPTIONAL OUT CHAR8 *Ascii OPTIONAL ) /*++ Routine Description: Detects if a Unicode char is for Box Drawing text graphics. Arguments: Grphic - Unicode char to test. PcAnsi - Optional pointer to return PCANSI equivalent of Graphic. Asci - Optional pointer to return Ascii equivalent of Graphic. Returns: TRUE if Gpaphic is a supported Unicode Box Drawing character. --*/{ UNICODE_TO_CHAR *Table; if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) { // // Unicode drawing code charts are all in the 0x25xx range, // arrows are 0x21xx // return FALSE; } for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) { if (Graphic == Table->Unicode) { if (PcAnsi) { *PcAnsi = Table->PcAnsi; } if (Ascii) { *Ascii = Table->Ascii; } return TRUE; } } return FALSE; } BOOLEAN IsValidAscii ( IN CHAR16 Ascii ) { if ((Ascii >= 0x20) && (Ascii <= 0x7f)) { return TRUE; } return FALSE; } BOOLEAN IsValidEfiCntlChar ( IN CHAR16 c ) { if (c == CHAR_NULL || c == CHAR_BACKSPACE || c == CHAR_LINEFEED || c == CHAR_CARRIAGE_RETURN) { return TRUE; } return FALSE; }