From 0e96d352088b36ebcd797ddc6ef60a5a9e1763e0 Mon Sep 17 00:00:00 2001 From: pnv6942az <1296263419@qq.com> Date: Sun, 3 Jul 2022 18:39:06 +0800 Subject: [PATCH] =?UTF-8?q?=E4=B8=AD=E6=96=AD=E5=A4=84=E7=90=86?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- tty_io.c | 419 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 419 insertions(+) create mode 100644 tty_io.c diff --git a/tty_io.c b/tty_io.c new file mode 100644 index 0000000..66786d3 --- /dev/null +++ b/tty_io.c @@ -0,0 +1,419 @@ +/* + * linux/kernel/tty_io.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 'tty_io.c' gives an orthogonal feeling to tty's, be they consoles + * or rs-channels. It also implements echoing, cooked mode etc. + * + * Kill-line thanks to John T Kohl. + */ +#include +#include +#include + + +#define ALRMMASK (1<<(SIGALRM-1)) +#define KILLMASK (1<<(SIGKILL-1)) +#define INTMASK (1<<(SIGINT-1)) +#define QUITMASK (1<<(SIGQUIT-1)) +#define TSTPMASK (1<<(SIGTSTP-1)) + +#include +#include +#include +#include + +#define _L_FLAG(tty,f) ((tty)->termios.c_lflag & f) +#define _I_FLAG(tty,f) ((tty)->termios.c_iflag & f) +#define _O_FLAG(tty,f) ((tty)->termios.c_oflag & f) + +#define L_CANON(tty) _L_FLAG((tty),ICANON) +#define L_ISIG(tty) _L_FLAG((tty),ISIG) +#define L_ECHO(tty) _L_FLAG((tty),ECHO) +#define L_ECHOE(tty) _L_FLAG((tty),ECHOE) +#define L_ECHOK(tty) _L_FLAG((tty),ECHOK) +#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL) +#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE) + +#define I_UCLC(tty) _I_FLAG((tty),IUCLC) +#define I_NLCR(tty) _I_FLAG((tty),INLCR) +#define I_CRNL(tty) _I_FLAG((tty),ICRNL) +#define I_NOCR(tty) _I_FLAG((tty),IGNCR) + +#define O_POST(tty) _O_FLAG((tty),OPOST) +#define O_NLCR(tty) _O_FLAG((tty),ONLCR) +#define O_CRNL(tty) _O_FLAG((tty),OCRNL) +#define O_NLRET(tty) _O_FLAG((tty),ONLRET) +#define O_LCUC(tty) _O_FLAG((tty),OLCUC) + +struct tty_struct tty_table[] = { + { + {ICRNL, /* change incoming CR to NL */ + OPOST|ONLCR, /* change outgoing NL to CRNL */ + 0, + ISIG | ICANON | ECHO | ECHOCTL | ECHOKE, + 0, /* console termio */ + INIT_C_CC}, + 0, /* initial pgrp */ + 0, /* initial stopped */ + con_write, + {0,0,0,0,""}, /* console read-queue */ + {0,0,0,0,""}, /* console write-queue */ + {0,0,0,0,""} /* console secondary queue */ + },{ + {0, /* no translation */ + 0, /* no translation */ + B2400 | CS8, + 0, + 0, + INIT_C_CC}, + 0, + 0, + rs_write, + {0x3f8,0,0,0,""}, /* rs 1 */ + {0x3f8,0,0,0,""}, + {0,0,0,0,""} + },{ + {0, /* no translation */ + 0, /* no translation */ + B2400 | CS8, + 0, + 0, + INIT_C_CC}, + 0, + 0, + rs_write, + {0x2f8,0,0,0,""}, /* rs 2 */ + {0x2f8,0,0,0,""}, + {0,0,0,0,""} + } +}; + +/* + * these are the tables used by the machine code handlers. + * you can implement pseudo-tty's or something by changing + * them. Currently not done. + */ +struct tty_queue * table_list[]={ + &tty_table[0].read_q, &tty_table[0].write_q, + &tty_table[1].read_q, &tty_table[1].write_q, + &tty_table[2].read_q, &tty_table[2].write_q + }; + +void tty_init(void) +{ + rs_init(); + con_init(); +} + +void tty_intr(struct tty_struct * tty, int mask) +{ + int i; + + if (tty->pgrp <= 0) + return; + for (i=0;ipgrp==tty->pgrp) + task[i]->signal |= mask; +} + +static void sleep_if_empty(struct tty_queue * queue) +{ + cli(); + while (!current->signal && EMPTY(*queue)) + interruptible_sleep_on(&queue->proc_list); + sti(); +} + +static void sleep_if_full(struct tty_queue * queue) +{ + if (!FULL(*queue)) + return; + cli(); + while (!current->signal && LEFT(*queue)<128) + interruptible_sleep_on(&queue->proc_list); + sti(); +} + +void wait_for_keypress(void) +{ + sleep_if_empty(&tty_table[0].secondary); +} + +void copy_to_cooked(struct tty_struct * tty) +{ + signed char c; + + while (!EMPTY(tty->read_q) && !FULL(tty->secondary)) { + GETCH(tty->read_q,c); + if (c==13) + if (I_CRNL(tty)) + c=10; + else if (I_NOCR(tty)) + continue; + else ; + else if (c==10 && I_NLCR(tty)) + c=13; + if (I_UCLC(tty)) + c=tolower(c); + if (L_CANON(tty)) { + if (c==KILL_CHAR(tty)) { + /* deal with killing the input line */ + while(!(EMPTY(tty->secondary) || + (c=LAST(tty->secondary))==10 || + c==EOF_CHAR(tty))) { + if (L_ECHO(tty)) { + if (c<32) + PUTCH(127,tty->write_q); + PUTCH(127,tty->write_q); + tty->write(tty); + } + DEC(tty->secondary.head); + } + continue; + } + if (c==ERASE_CHAR(tty)) { + if (EMPTY(tty->secondary) || + (c=LAST(tty->secondary))==10 || + c==EOF_CHAR(tty)) + continue; + if (L_ECHO(tty)) { + if (c<32) + PUTCH(127,tty->write_q); + PUTCH(127,tty->write_q); + tty->write(tty); + } + DEC(tty->secondary.head); + continue; + } + if (c==STOP_CHAR(tty)) { + tty->stopped=1; + continue; + } + if (c==START_CHAR(tty)) { + tty->stopped=0; + continue; + } + } + if (L_ISIG(tty)) { + if (c==INTR_CHAR(tty)) { + tty_intr(tty,INTMASK); + continue; + } + if (c==QUIT_CHAR(tty)) { + tty_intr(tty,QUITMASK); + continue; + } + } + if (c==10 || c==EOF_CHAR(tty)) + tty->secondary.data++; + if (L_ECHO(tty)) { + if (c==10) { + PUTCH(10,tty->write_q); + PUTCH(13,tty->write_q); + } else if (c<32) { + if (L_ECHOCTL(tty)) { + PUTCH('^',tty->write_q); + PUTCH(c+64,tty->write_q); + } + } else + PUTCH(c,tty->write_q); + tty->write(tty); + } + PUTCH(c,tty->secondary); + } + wake_up(&tty->secondary.proc_list); +} + +int tty_read(unsigned channel, char * buf, int nr) +{ + struct tty_struct * tty; + char c, * b=buf; + int minimum,time,flag=0; + long oldalarm; + + if (channel>2 || nr<0) return -1; + tty = &tty_table[channel]; + oldalarm = current->alarm; + time = 10L*tty->termios.c_cc[VTIME]; + minimum = tty->termios.c_cc[VMIN]; + if (time && !minimum) { + minimum=1; + if (flag=(!oldalarm || time+jiffiesalarm = time+jiffies; + } + if (minimum>nr) + minimum=nr; + while (nr>0) { + if (flag && (current->signal & ALRMMASK)) { + current->signal &= ~ALRMMASK; + break; + } + if (current->signal) + break; + if (EMPTY(tty->secondary) || (L_CANON(tty) && + !tty->secondary.data && LEFT(tty->secondary)>20)) { + sleep_if_empty(&tty->secondary); + continue; + } + do { + GETCH(tty->secondary,c); + if (c==EOF_CHAR(tty) || c==10) + tty->secondary.data--; + if (c==EOF_CHAR(tty) && L_CANON(tty)) + return (b-buf); + else { + put_fs_byte(c,b++); + if (!--nr) + break; + } + } while (nr>0 && !EMPTY(tty->secondary)); + if (time && !L_CANON(tty)) + if (flag=(!oldalarm || time+jiffiesalarm = time+jiffies; + else + current->alarm = oldalarm; + if (L_CANON(tty)) { + if (b-buf) + break; + } else if (b-buf >= minimum) + break; + } + current->alarm = oldalarm; + if (current->signal && !(b-buf)) + return -EINTR; + return (b-buf); +} + +int tty_write(unsigned channel, char * buf, int nr) +{ + static cr_flag=0; + struct tty_struct * tty; + char c, *b=buf; + + if (channel>2 || nr<0) return -1; + tty = channel + tty_table; + while (nr>0) { + sleep_if_full(&tty->write_q); + if (current->signal) + break; + while (nr>0 && !FULL(tty->write_q)) { + c=get_fs_byte(b); + if (O_POST(tty)) { + if (c=='\r' && O_CRNL(tty)) + c='\n'; + else if (c=='\n' && O_NLRET(tty)) + c='\r'; + if (c=='\n' && !cr_flag && O_NLCR(tty)) { + cr_flag = 1; + PUTCH(13,tty->write_q); + continue; + } + if (O_LCUC(tty)) + c=toupper(c); + } + b++; nr--; + cr_flag = 0; + PUTCH(c,tty->write_q); + } + tty->write(tty); + if (nr>0) + schedule(); + } + return (b-buf); +} + +/* + * Jeh, sometimes I really like the 386. + * This routine is called from an interrupt, + * and there should be absolutely no problem + * with sleeping even in an interrupt (I hope). + * Of course, if somebody proves me wrong, I'll + * hate intel for all time :-). We'll have to + * be careful and see to reinstating the interrupt + * chips before calling this, though. + * + * I don't think we sleep here under normal circumstances + * anyway, which is good, as the task sleeping might be + * totally innocent. + */ +void do_tty_interrupt(int tty) +{ + copy_to_cooked(tty_table+tty); +} + +void chr_dev_init(void) +{ +} + + +#define MSG_MOUSE_CLICK 1 +static unsigned char mouse_input_count = 0; //记录是鼠标输入的第几个字节的全局变量 +static unsigned char mouse_left_down; //记录鼠标左键是否按下 +static unsigned char mouse_right_down; //记录鼠标右键是否按下 +static unsigned char mouse_left_move; //记录鼠标是否向左移动 +static unsigned char mouse_down_move;//记录鼠标是否向下移动 + +static int mouse_x_position; //记录鼠标的 x 轴位置 +static int mouse_y_position;//记录鼠标的 y 轴位置 +int cnt=0; +extern struct message *headd; +void readmouse(int mousecode) +{ +if(mousecode==0xFA || mouse_input_count>=4 ) +{ + mouse_input_count=1; +return ; +} + +if(cnt!=mousecode) +{ +cnt=mousecode; +} +switch(mouse_input_count) +{ +case 1://左右键按下 + mouse_left_down=(mousecode &0x01) ==0x01; + mouse_right_down=(mousecode &0x02)==0x02; + mouse_left_move=(mousecode & 0x10)==0x10; + mouse_down_move=(mousecode & 0x20)==0x20; + mouse_input_count++; + if(mouse_left_down==1 && mouse_left_move==0 && mouse_down_move==0) + { + post_message(); + } + break; +case 2: + //x轴位置 + if(mouse_left_move) mouse_x_position +=(int)(0xFFFFFF00|mousecode); + if(mouse_x_position>100) mouse_x_position=100; + if(mouse_x_position<0) mouse_x_position=0; + mouse_input_count++; + break; + + +case 3: + //y + if(mouse_down_move) mouse_y_position +=(int)(0xFFFFFF00|mousecode); + if(mouse_y_position>100) mouse_y_position=100; + if(mouse_y_position<0) mouse_y_position=0; + mouse_input_count++; + break; + +case 4: +//z +break; +}} + +void post_message() +{ + cli(); + //防止鼠标移动导致疯狂中断 + if(jumpp<=10) + jumpp++; + sti(); +return; +}