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