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@@ -0,0 +1,346 @@
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+#include <u.h>
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+#include <libc.h>
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+
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+enum {
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+ Spec = 0xF800, /* Unicode private space */
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+ PF = Spec|0x20, /* num pad function key */
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+ View = Spec|0x00, /* view (shift window up) */
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+ Shift = Spec|0x60,
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+ Break = Spec|0x61,
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+ Ctrl = Spec|0x62,
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+ Alt = Spec|0x63,
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+ Caps = Spec|0x64,
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+ Num = Spec|0x65,
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+ Middle = Spec|0x66,
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+ Altgr = Spec|0x67,
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+ Kmouse = Spec|0x100,
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+ No = 0x00, /* peter */
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+
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+ KF = 0xF000, /* function key (begin Unicode private space) */
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+ Home = KF|13,
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+ Up = KF|14,
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+ Pgup = KF|15,
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+ Print = KF|16,
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+ Left = KF|17,
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+ Right = KF|18,
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+ End = KF|24,
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+ Down = View,
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+ Pgdown = KF|19,
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+ Ins = KF|20,
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+ Del = 0x7F,
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+ Scroll = KF|21,
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+};
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+
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+typedef struct Keybscan Keybscan;
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+struct Keybscan {
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+ int esc1;
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+ int esc2;
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+ int alt;
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+ int altgr;
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+ int caps;
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+ int ctl;
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+ int num;
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+ int shift;
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+ int collecting;
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+ int nk;
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+ Rune kc[5];
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+ int buttons;
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+};
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+
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+static Keybscan kbscan;
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+
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+static Rune kbtab[256] =
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+{
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+[0x00] No, '\x1b', '1', '2', '3', '4', '5', '6',
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+[0x08] '7', '8', '9', '0', '-', '=', '\b', '\t',
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+[0x10] 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
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+[0x18] 'o', 'p', '[', ']', '\n', Ctrl, 'a', 's',
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+[0x20] 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
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+[0x28] '\'', '`', Shift, '\\', 'z', 'x', 'c', 'v',
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+[0x30] 'b', 'n', 'm', ',', '.', '/', Shift, '*',
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+[0x38] Alt, ' ', Ctrl, KF|1, KF|2, KF|3, KF|4, KF|5,
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+[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, Scroll, '7',
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+[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
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+[0x50] '2', '3', '0', '.', No, No, No, KF|11,
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+[0x58] KF|12, No, No, No, No, No, No, No,
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+[0x60] No, No, No, No, No, No, No, No,
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+[0x68] No, No, No, No, No, No, No, No,
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+[0x70] No, No, No, No, No, No, No, No,
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+[0x78] No, View, No, Up, No, No, No, No,
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+};
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+
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+static Rune kbtabshift[256] =
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+{
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+[0x00] No, '\x1b', '!', '@', '#', '$', '%', '^',
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+[0x08] '&', '*', '(', ')', '_', '+', '\b', '\t',
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+[0x10] 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
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+[0x18] 'O', 'P', '{', '}', '\n', Ctrl, 'A', 'S',
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+[0x20] 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
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+[0x28] '"', '~', Shift, '|', 'Z', 'X', 'C', 'V',
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+[0x30] 'B', 'N', 'M', '<', '>', '?', Shift, '*',
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+[0x38] Alt, ' ', Ctrl, KF|1, KF|2, KF|3, KF|4, KF|5,
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+[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, Scroll, '7',
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+[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
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+[0x50] '2', '3', '0', '.', No, No, No, KF|11,
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+[0x58] KF|12, No, No, No, No, No, No, No,
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+[0x60] No, No, No, No, No, No, No, No,
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+[0x68] No, No, No, No, No, No, No, No,
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+[0x70] No, No, No, No, No, No, No, No,
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+[0x78] No, Up, No, Up, No, No, No, No,
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+};
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+
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+static Rune kbtabesc1[256] =
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+{
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+[0x00] No, No, No, No, No, No, No, No,
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+[0x08] No, No, No, No, No, No, No, No,
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+[0x10] No, No, No, No, No, No, No, No,
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+[0x18] No, No, No, No, '\n', Ctrl, No, No,
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+[0x20] No, No, No, No, No, No, No, No,
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+[0x28] No, No, Shift, No, No, No, No, No,
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+[0x30] No, No, No, No, No, '/', No, Print,
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+[0x38] Altgr, No, No, No, No, No, No, No,
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+[0x40] No, No, No, No, No, No, Break, Home,
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+[0x48] Up, Pgup, No, Left, No, Right, No, End,
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+[0x50] Down, Pgdown, Ins, Del, No, No, No, No,
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+[0x58] No, No, No, No, No, No, No, No,
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+[0x60] No, No, No, No, No, No, No, No,
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+[0x68] No, No, No, No, No, No, No, No,
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+[0x70] No, No, No, No, No, No, No, No,
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+[0x78] No, Up, No, No, No, No, No, No,
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+};
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+
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+static Rune kbtabaltgr[256] =
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+{
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+[0x00] No, No, No, No, No, No, No, No,
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+[0x08] No, No, No, No, No, No, No, No,
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+[0x10] No, No, No, No, No, No, No, No,
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+[0x18] No, No, No, No, '\n', Ctrl, No, No,
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+[0x20] No, No, No, No, No, No, No, No,
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+[0x28] No, No, Shift, No, No, No, No, No,
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+[0x30] No, No, No, No, No, '/', No, Print,
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+[0x38] Altgr, No, No, No, No, No, No, No,
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+[0x40] No, No, No, No, No, No, Break, Home,
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+[0x48] Up, Pgup, No, Left, No, Right, No, End,
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+[0x50] Down, Pgdown, Ins, Del, No, No, No, No,
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+[0x58] No, No, No, No, No, No, No, No,
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+[0x60] No, No, No, No, No, No, No, No,
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+[0x68] No, No, No, No, No, No, No, No,
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+[0x70] No, No, No, No, No, No, No, No,
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+[0x78] No, Up, No, No, No, No, No, No,
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+};
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+
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+static Rune kbtabctrl[256] =
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+{
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+[0x00] No, '\x1b', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16',
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+[0x08] '\x17', '\x18', '\x19', '\x10', '\n', '\x1d', '\b', '\t',
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+[0x10] '\x11', '\x17', '\x05', '\x12', '\x14', '\x19', '\x15', '\t',
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+[0x18] '\x0f', '\x10', '\x1b', '\x1d', '\n', Ctrl, '\x01', '\x13',
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+[0x20] '\x04', '\x06', '\x07', '\b', '\n', '\x0b', '\x0c', '\x1b',
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+[0x28] '\x07', No, Shift, '\x1c', '\x1a', '\x18', '\x03', '\x16',
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+[0x30] '\x02', '\x0e', '\n', '\x0c', '\x0e', '\x0f', Shift, '\n',
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+[0x38] Alt, No, Ctrl, '\x05', '\x06', '\x07', '\x04', '\x05',
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+[0x40] '\x06', '\x07', '\x0c', '\n', '\x0e', '\x05', '\x06', '\x17',
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+[0x48] '\x18', '\x19', '\n', '\x14', '\x15', '\x16', '\x0b', '\x11',
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+[0x50] '\x12', '\x13', '\x10', '\x0e', No, No, No, '\x0f',
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+[0x58] '\x0c', No, No, No, No, No, No, No,
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+[0x60] No, No, No, No, No, No, No, No,
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+[0x68] No, No, No, No, No, No, No, No,
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+[0x70] No, No, No, No, No, No, No, No,
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+[0x78] No, '\x07', No, '\b', No, No, No, No,
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+};
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+
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+int
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+keybscan(uint8_t code, char *out, int len)
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+{
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+ Rune c;
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+ int keyup;
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+ int off;
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+
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+ c = code;
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+ off = 0;
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+
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+ if(len < 16){
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+ fprint(2, "keybscan: input buffer too short to be safe\n");
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+ return -1;
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+ }
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+ if(c == 0xe0){
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+ kbscan.esc1 = 1;
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+ return off;
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+ } else if(c == 0xe1){
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+ kbscan.esc2 = 2;
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+ return off;
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+ }
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+
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+ keyup = c&0x80;
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+ c &= 0x7f;
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+ if(c > sizeof kbtab){
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+ c |= keyup;
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+ if(c != 0xFF) /* these come fairly often: CAPSLOCK U Y */
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+ fprint(2, "unknown key %ux\n", c);
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+ return off;
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+ }
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+
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+ if(kbscan.esc1){
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+ c = kbtabesc1[c];
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+ kbscan.esc1 = 0;
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+ } else if(kbscan.esc2){
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+ kbscan.esc2--;
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+ return off;
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+ } else if(kbscan.shift)
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+ c = kbtabshift[c];
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+ else if(kbscan.altgr)
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+ c = kbtabaltgr[c];
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+ else if(kbscan.ctl)
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+ c = kbtabctrl[c];
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+ else
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+ c = kbtab[c];
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+
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+ if(kbscan.caps && c<='z' && c>='a')
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+ c += 'A' - 'a';
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+
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+ /*
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+ * keyup only important for shifts
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+ */
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+ if(keyup){
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+ switch(c){
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+ case Alt:
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+ kbscan.alt = 0;
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+ break;
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+ case Shift:
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+ kbscan.shift = 0;
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+ /*mouseshifted = 0;*/
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+ break;
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+ case Ctrl:
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+ kbscan.ctl = 0;
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+ break;
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+ case Altgr:
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+ kbscan.altgr = 0;
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+ break;
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+ case Kmouse|1:
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+ case Kmouse|2:
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+ case Kmouse|3:
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+ case Kmouse|4:
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+ case Kmouse|5:
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+ kbscan.buttons &= ~(1<<(c-Kmouse-1));
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+ /*if(kbdmouse)kbdmouse(kbscan.buttons);*/
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+ break;
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+ }
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+ return off;
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+ }
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+
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+ /*
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+ * normal character
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+ */
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+ if(!(c & (Spec|KF))){
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+ off += runetochar(out+off, &c);
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+ return off;
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+ } else {
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+ switch(c){
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+ case Caps:
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+ kbscan.caps ^= 1;
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+ return off;
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+ case Num:
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+ kbscan.num ^= 1;
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+ return off;
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+ case Shift:
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+ kbscan.shift = 1;
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+ /*mouseshifted = 1;*/
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+ return off;
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+ case Alt:
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+ kbscan.alt = 1;
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+ /*
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+ * VMware and Qemu use Ctl-Alt as the key combination
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+ * to make the VM give up keyboard and mouse focus.
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+ * This has the unfortunate side effect that when you
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+ * come back into focus, Plan 9 thinks you want to type
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+ * a compose sequence (you just typed alt).
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+ *
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+ * As a clumsy hack around this, we look for ctl-alt
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+ * and don't treat it as the start of a compose sequence.
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+ */
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+ return off;
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+ case Ctrl:
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+ kbscan.ctl = 1;
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+ return off;
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+ case Altgr:
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+ kbscan.altgr = 1;
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+ return off;
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+ case Kmouse|1:
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+ case Kmouse|2:
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+ case Kmouse|3:
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+ case Kmouse|4:
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+ case Kmouse|5:
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+ kbscan.buttons |= 1<<(c-Kmouse-1);
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+ /*if(kbdmouse)kbdmouse(kbscan.buttons);*/
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+ return off;
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+ }
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+ }
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+
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+ off += runetochar(out+off, &c);
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+ return off;
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+
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+}
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+
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+enum {
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+ Black = 0x00,
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+ Blue = 0x01,
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+ Green = 0x02,
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+ Cyan = 0x03,
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+ Red = 0x04,
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+ Magenta = 0x05,
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+ Brown = 0x06,
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+ Grey = 0x07,
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+
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+ Bright = 0x08,
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+ Blinking = 0x80,
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+
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+ Attr = (Black<<4)|Grey, /* (background<<4)|foreground */
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+ Cursor = (Grey<<4)|Black,
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+};
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+
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+enum {
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+ Width = 80*2,
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+ Height = 25,
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+};
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+
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+int
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+readline(char* buf, int buflen)
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+{
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+ int ps2fd;
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+ int i, n, off, lastoff, len;
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+ char* scan;
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+ static uint8_t ibuf[32];
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+
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+ if((ps2fd = open("#P/ps2keyb", OREAD)) == -1){
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+ errstr(buf, sizeof buf);
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+ fprint(2, "open #P/ps2keyb: %s\n", buf);
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+ return -1;
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+ }
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+
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+ off = 0;
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+ for (;;){
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+ while((len = read(ps2fd, ibuf, sizeof ibuf)) > 0){
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+ lastoff = off;
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+ for(i = 0; i < len; i++){
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+ if((n = keybscan(ibuf[i], buf+off, buflen - off)) == -1){
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+ fprint(2, "keybscan -1\n");
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+ return -1;
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+ }
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+ off += n;
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+ }
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+ if(buf[off-1] == '\n')
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+ goto GotLine;
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+ if(off > 0){
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+ for(scan = buf + lastoff; scan < buf + off; scan++){
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+ write(1, scan, 1);
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+ if(*scan == 0x8)
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+ off -= 2;
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+ }
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+ }
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+ }
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+ }
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+GotLine:
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+ write(1, "\n", 1);
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+ buf[off] = '\0';
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+ return off - 1;
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+}
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