vt100.c

minicom的源码,linux下常用的串口程序.

/*
 * vt100.c	ANSI/VT102 emulator code.
 *		This code was integrated to the Minicom communications
 *		package, but has been reworked to allow usage as a separate
 *		module.
 *
 *		It's not a "real" vt102 emulator - it's more than that:
 *		somewhere between vt220 and vt420 in commands.
 *
 *		This file is part of the minicom communications package,
 *		Copyright 1991-1995 Miquel van Smoorenburg.
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * // jl 04.09.97 character map conversions in and out
 *    jl 06.07.98 use conversion tables with the capture file
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "rcsid.h"
RCSID("$Id: vt100.c,v 1.10 2006/04/02 09:52:30 al-guest Exp $")

#include "port.h"
#include "minicom.h"
#include "vt100.h"
#include "config.h"

#define OLD 0

/*
 * The global variable esc_s holds the escape sequence status:
 * 0 - normal
 * 1 - ESC
 * 2 - ESC [
 * 3 - ESC [ ?
 * 4 - ESC (
 * 5 - ESC )
 * 6 - ESC #
 * 7 - ESC P
 */
static int esc_s = 0;

#define ESC 27

/* Structure to hold escape sequences. */
struct escseq {
  int code;
  const char *vt100_st;
  const char *vt100_app;
  const char *ansi;
};

/* Escape sequences for different terminal types. */
static struct escseq vt_keys[] = {
#ifndef _DGUX_SOURCE
  { K_F1,	"OP",	"OP",	"OP" },
  { K_F2,	"OQ",	"OQ",	"OQ" },
  { K_F3,	"OR",	"OR",	"OR" },
  { K_F4,	"OS",	"OS",	"OS" },
  { K_F5,	"[16~",	"[16~",	"OT" },
  { K_F6,	"[17~",	"[17~",	"OU" },
  { K_F7,	"[18~",	"[18~",	"OV" },
  { K_F8,	"[19~",	"[19~",	"OW" },
  { K_F9,	"[20~",	"[20~",	"OX" },
  { K_F10,	"[21~",	"[21~",	"OY" },
  { K_F11,	"[23~",	"[23~",	"OY" },
  { K_F12,	"[24~",	"[24~",	"OY" },
  { K_HOME,	"[1~",	"[1~",	"[H" },
  { K_PGUP,	"[5~",	"[5~",	"[V" },
  { K_UP,	"[A",	"OA",	"[A" },
  { K_LT,	"[D",	"OD",	"[D" },
  { K_RT,	"[C",	"OC",	"[C" },
  { K_DN,	"[B",	"OB",	"[B" },
  { K_END,	"[4~",	"[4~",	"[Y" },
  { K_PGDN,	"[6~",	"[6~",	"[U" },
  { K_INS,	"[2~",	"[2~",	"[@" },
  { K_DEL,	"[3~",	"[3~",	"\177" },
  { 0,		NULL,	NULL,	NULL }
#else
  { K_F1,      "[17~", "[17~", "OP" },
  { K_F2,      "[18~", "[18~", "OQ" },
  { K_F3,      "[19~", "[19~", "OR" },
  { K_F4,      "[20~", "[20~", "OS" },
  { K_F5,      "[21~", "[21~", "OT" },
  { K_F6,      "[23~", "[23~", "OU" },
  { K_F7,      "[24~", "[24~", "OV" },
  { K_F8,      "[25~", "[25~", "OW" },
  { K_F9,      "[26~", "[26~", "OX" },
  { K_F10,     "[28~", "[28~", "OY" },
  { K_F11,     "[29~", "[29~", "OZ" },
  { K_F12,     "[31~", "[31~", "OA" },
  { K_HOME,    "OP",   "OP",   "[H" },
  { K_PGUP,    "OQ",   "OQ",   "[V" },
  { K_UP,      "[A",   "OA",   "[A" },
  { K_LT,      "[D",   "OD",   "[D" },
  { K_RT,      "[C",   "OC",   "[C" },
  { K_DN,      "[B",   "OB",   "[B" },
  { K_END,     "OR",   "OR",   "[Y" },
  { K_PGDN,    "OS",   "OS",   "[U" },
  { K_INS,     "[1~",  "[1~",  "[@"  },
  { K_DEL,     "[3~",  "[3~",  "\177" },
  { 0,         NULL,   NULL,   NULL }
#endif
};

/* Two tables for user-defined character map conversions.
 * defmap.h should contain all characters 0-255 in ascending order
 * to default to no conversion.    jl 04.09.1997
 */

unsigned char vt_inmap[256] = {
#include "defmap.h"
};
unsigned char vt_outmap[256] = {
#include "defmap.h"
};

#if TRANSLATE
/* Taken from the Linux kernel source: linux/drivers/char/console.c */
static unsigned char * vt_map[] = {
/* 8-bit Latin-1 mapped to the PC character set: '.' means non-printable */
(unsigned char *)
  "................"
  "................"
  " !\"#$%&'()*+,-./0123456789:;<=>?"
  "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
  "`abcdefghijklmnopqrstuvwxyz{|}~."
  "................"
  "................"
  "\377\255\233\234\376\235\174\025\376\376\246\256\252\055\376\376"
  "\370\361\375\376\376\346\024\371\376\376\247\257\254\253\376\250"
  "\376\376\376\376\216\217\222\200\376\220\376\376\376\376\376\376"
  "\376\245\376\376\376\376\231\376\350\376\376\376\232\376\376\341"
  "\205\240\203\376\204\206\221\207\212\202\210\211\215\241\214\213"
  "\376\244\225\242\223\376\224\366\355\227\243\226\201\376\376\230",
/* vt100 graphics */
(unsigned char *)
  "................"
  "\0\0\0\0\0\0\0\0\0\0\376\0\0\0\0\0"
  " !\"#$%&'()*+,-./0123456789:;<=>?"
  "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^ "
  "\004\261\007\007\007\007\370\361\007\007\331\277\332\300\305\304"
  "\304\304\137\137\303\264\301\302\263\363\362\343\330\234\007\0"
  "................"
  "................"
  "\377\255\233\234\376\235\174\025\376\376\246\256\252\055\376\376"
  "\370\361\375\376\376\346\024\371\376\376\247\257\254\253\376\250"
  "\376\376\376\376\216\217\222\200\376\220\376\376\376\376\376\376"
  "\376\245\376\376\376\376\231\376\376\376\376\376\232\376\376\341"
  "\205\240\203\376\204\206\221\207\212\202\210\211\215\241\214\213"
  "\376\244\225\242\223\376\224\366\376\227\243\226\201\376\376\230"
};
static char *vt_trans[2];
static int vt_charset = 0;	/* Character set. */
#endif

static int vt_echo;		/* Local echo on/off. */
int vt_nl_delay;		/* Delay after CR key */
static int vt_type   = ANSI;	/* Terminal type. */
static int vt_wrap   = 0;	/* Line wrap on/off */
static int vt_addlf  = 0;	/* Add linefeed on/off */
static int vt_fg;		/* Standard foreground color. */
static int vt_bg;		/* Standard background color. */
static int vt_keypad;		/* Keypad mode. */
static int vt_cursor;		/* cursor key mode. */
static int vt_asis = 0;		/* 8bit clean mode. */
static int vt_bs = 8;		/* Code that backspace key sends. */
static int vt_insert = 0;	/* Insert mode */
static int vt_crlf = 0;		/* Return sends CR/LF */
static int vt_om;		/* Origin mode. */
WIN *vt_win          = NULL;	/* Output window. */
static int vt_docap;		/* Capture on/off. */
static FILE *vt_capfp;		/* Capture file. */
static void (*vt_keyb)(int, int);/* Gets called for NORMAL/APPL switch. */
static void (*termout)(const char *, int);/* Gets called to output a string. */

static int escparms[8];		/* Cumulated escape sequence. */
#if OLD
static int ptr = -2;		/* Index into escparms array. */
#else
static int ptr = 0;		/* Index into escparms array. */
#endif
static long vt_tabs[5];		/* Tab stops for max. 32*5 = 160 columns. */

short newy1 = 0;		/* Current size of scrolling region. */
short newy2 = 23;

/* Saved color and posistions */
static short savex = 0, savey = 0, saveattr = XA_NORMAL, savecol = 112;

#if TRANSLATE
static short savecharset;
static char *savetrans[2];
#endif

/*
 * Initialize the emulator once.
 */
void vt_install(void (*fun1)(const char *, int), void (*fun2)(int, int),
                WIN *win)
{
  termout = fun1;
  vt_keyb = fun2;
  vt_win = win;
}

/* Partial init (after screen resize) */
void vt_pinit(WIN *win, int fg, int bg)
{
  vt_win = win;
  newy1 = 0;
  newy2 = vt_win->ys - 1;
  wresetregion(vt_win);
  if (fg > 0)
    vt_fg = fg;
  if (bg > 0)
    vt_bg = bg;
  wsetfgcol(vt_win, vt_fg);
  wsetbgcol(vt_win, vt_bg);
}

/* Set characteristics of emulator. */
void vt_init(int type, int fg, int bg, int wrap, int add)
{
  vt_type = type;
  if (vt_type == ANSI) {
	vt_fg = WHITE;
	vt_bg = BLACK;
  } else {
	vt_fg = fg;
	vt_bg = bg;
  }
  if (wrap >= 0)
    vt_win->wrap = vt_wrap = wrap;
  vt_addlf = add;
  vt_insert = 0;
  vt_crlf = 0;
  vt_om = 0;

  newy1 = 0;
  newy2 = vt_win->ys - 1;
  wresetregion(vt_win);
  vt_keypad = NORMAL;
  vt_cursor = NORMAL;
  vt_echo = 0;
  vt_tabs[0] = 0x01010100;
  vt_tabs[1] =
  vt_tabs[2] =
  vt_tabs[3] =
  vt_tabs[4] = 0x01010101;
#if TRANSLATE
  vt_charset = 0;
  vt_trans[0] = savetrans[0] = vt_map[0];
  vt_trans[1] = savetrans[1] = vt_map[1];
#endif
#if OLD
  ptr = -2;
#else
  ptr = 0;
  memset(escparms, 0, sizeof(escparms));
#endif
  esc_s = 0;

  if (vt_keyb)
    (*vt_keyb)(vt_keypad, vt_cursor);
  wsetfgcol(vt_win, vt_fg);
  wsetbgcol(vt_win, vt_bg);
}

/* Change some things on the fly. */
void vt_set(int addlf, int wrap, FILE *capfp, int docap, int bscode,
            int echo, int cursor, int asis)
{
  if (addlf >= 0)
    vt_addlf = addlf;
  if (wrap >= 0)
    vt_win->wrap = vt_wrap = wrap;
  if (capfp != NULL)
    vt_capfp = capfp;
  if (docap >= 0)
    vt_docap = docap;
  if (bscode >= 0)
    vt_bs = bscode;
  if (echo >= 0)
    vt_echo = echo;
  if (cursor >= 0)
    vt_cursor = cursor;
  if (asis >=0)
    vt_asis = asis;
}

/* Output a string to the modem. */
static void v_termout(const char *s, int len)
{
  const char *p;

  if (vt_echo) {
    for (p = s; *p; p++) {
      vt_out(*p);
      if (!vt_addlf && *p == '\r')
        vt_out('\n');
    }
    wflush();
  }

  (*termout)(s, len);
}

/*
 * Escape code handling.
 */

/*
 * ESC was seen the last time. Process the next character.
 */
static void state1(int c)
{
  short x, y, f;

  switch(c) {
    case '[': /* ESC [ */
      esc_s = 2;
      return;
    case '(': /* ESC ( */
      esc_s = 4;
      return;
    case ')': /* ESC ) */
      esc_s = 5;
      return;
    case '#': /* ESC # */
      esc_s = 6;
      return;
    case 'P': /* ESC P (DCS, Device Control String) */
      esc_s = 7;
      return;
    case 'D': /* Cursor down */
    case 'M': /* Cursor up */
      x = vt_win->curx;
      if (c == 'D') { /* Down. */
        y = vt_win->cury + 1;
        if (y == newy2 + 1)
          wscroll(vt_win, S_UP);
        else if (vt_win->cury < vt_win->ys)
          wlocate(vt_win, x, y);
      }
      if (c == 'M')  { /* Up. */
        y = vt_win->cury - 1;
        if (y == newy1 - 1)
          wscroll(vt_win, S_DOWN);
        else if (y >= 0)
          wlocate(vt_win, x, y);
      }
      break;
    case 'E': /* CR + NL */
      wputs(vt_win, "\r\n");
      break;
    case '7': /* Save attributes and cursor position */
    case 's':
      savex = vt_win->curx;
      savey = vt_win->cury;
      saveattr = vt_win->attr;
      savecol = vt_win->color;
#if TRANSLATE
      savecharset = vt_charset;
      savetrans[0] = vt_trans[0];
      savetrans[1] = vt_trans[1];
#endif
      break;
    case '8': /* Restore them */
    case 'u':
#if TRANSLATE
      vt_charset = savecharset;
      vt_trans[0] = savetrans[0];
      vt_trans[1] = savetrans[1];
#endif
      vt_win->color = savecol; /* HACK should use wsetfgcol etc */
      wsetattr(vt_win, saveattr);
      wlocate(vt_win, savex, savey);
      break;
    case '=': /* Keypad into applications mode */
      vt_keypad = APPL;
      if (vt_keyb)
        (*vt_keyb)(vt_keypad, vt_cursor);
      break;
    case '>': /* Keypad into numeric mode */
      vt_keypad = NORMAL;
      if (vt_keyb)
        (*vt_keyb)(vt_keypad, vt_cursor);
      break;
    case 'Z': /* Report terminal type */
      if (vt_type == VT100)
        v_termout("\033[?1;0c", 0);
      else
        v_termout("\033[?c", 0);
      break;
    case 'c': /* Reset to initial state */
      f = XA_NORMAL;
      wsetattr(vt_win, f);
      vt_win->wrap = (vt_type != VT100);
      if (vt_wrap != -1)
        vt_win->wrap = vt_wrap;
      vt_crlf = vt_insert = 0;
      vt_init(vt_type, vt_fg, vt_bg, vt_win->wrap, 0);
      wlocate(vt_win, 0, 0);
      break;
    case 'H': /* Set tab in current position */
      x = vt_win->curx;
      if (x > 159)
        x = 159;
      vt_tabs[x / 32] |= 1 << (x % 32);
      break;
    case 'N': /* G2 character set for next character only*/
    case 'O': /* G3 "				"    */
    case '<': /* Exit vt52 mode */
    default:
      /* ALL IGNORED */
      break;
  }
  esc_s = 0;
}

/* ESC [ ... [hl] seen. */
static void ansi_mode(int on_off)
{
  int i;

  for (i = 0; i <= ptr; i++) {
    switch (escparms[i]) {
      case 4: /* Insert mode  */
        vt_insert = on_off;
        break;
      case 20: /* Return key mode */
        vt_crlf = on_off;
        break;
    }
  }
}

/*
 * ESC [ ... was seen the last time. Process next character.
 */
static void state2(int c)
{
  short x, y, attr, f;
  char temp[32];

  /* See if a number follows */
  if (c >= '0' && c <= '9') {
#if OLD
    if (ptr < 0)
      ptr = 0;
#endif
    escparms[ptr] = 10*escparms[ptr] + c - '0';
    return;
  }
  /* Separation between numbers ? */
  if (c == ';') {
#if OLD
    if (ptr < 0)
      ptr = 0; /* [e-mail] */
    if (ptr >= 0 && ptr < 15)
      ptr++;
#else
    if (ptr < 15)
      ptr++;
#endif
    return;
  }
  /* ESC [ ? sequence */
#if OLD
  if (ptr < 0 && c == '?')
#else
  if (escparms[0] == 0 && ptr == 0 && c == '?')
#endif
  {
    esc_s = 3;
    return;
  }

  /* Process functions with zero, one, two or more arguments */
  switch (c) {
    case 'A':
    case 'B':
    case 'C':
    case 'D': /* Cursor motion */
      if ((f = escparms[0]) == 0)
        f = 1;
      x = vt_win->curx;
      y = vt_win->cury;
      x += f * ((c == 'C') - (c == 'D'));
      if (x < 0)
        x = 0;
      if (x >= vt_win->xs)
        x = vt_win->xs - 1;
      if (c == 'B') { /* Down. */
        y += f;
        if (y >= vt_win->ys)
          y = vt_win->ys - 1;
        if (y >= newy2 + 1)
          y = newy2;
      }
      if (c == 'A') { /* Up. */
        y -= f;
        if (y < 0)
          y = 0;
        if (y <= newy1 - 1)
          y = newy1;
      }	
      wlocate(vt_win, x, y);
      break;
    case 'X': /* Character erasing (ECH) */
      if ((f = escparms[0]) == 0)
        f = 1;
      wclrch(vt_win, f);
      break;
    case 'K': /* Line erasing */
      switch (escparms[0]) {
        case 0:
          wclreol(vt_win);
          break;
        case 1:
          wclrbol(vt_win);
          break;
        case 2:
          wclrel(vt_win);
          break;
      }
      break;
    case 'J': /* Screen erasing */
      x = vt_win->color;
      y = vt_win->attr;
      if (vt_type == ANSI) {
        wsetattr(vt_win, XA_NORMAL);
        wsetfgcol(vt_win, WHITE);
        wsetbgcol(vt_win, BLACK);
      }
      switch (escparms[0]) {
        case 0:
          wclreos(vt_win);
          break;
        case 1:
          wclrbos(vt_win);
          break;
        case 2:
          winclr(vt_win);
          break;
      }
      if (vt_type == ANSI) {
        vt_win->color = x;
        vt_win->attr = y;
      }
      break;
    case 'n': /* Requests / Reports */
      switch(escparms[0]) {
        case 5: /* Status */
          v_termout("\033[0n", 0);
          break;
        case 6:	/* Cursor Position */
          sprintf(temp, "\033[%d;%dR", vt_win->cury + 1, vt_win->curx + 1);
          v_termout(temp, 0);