usr.bin/tn3270/ascii/termin.c

   1 /*      $NetBSD: termin.c,v 1.7 2002/06/13 23:41:18 wiz Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1988 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)termin.c    4.2 (Berkeley) 4/26/91";
  36 #else
  37 __RCSID("$NetBSD: termin.c,v 1.7 2002/06/13 23:41:18 wiz Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 /* this takes characters from the keyboard, and produces 3270 keystroke
  42         codes
  43  */
  44
  45 #include <stdio.h>
  46 #include <ctype.h>
  47
  48 #include "../general/general.h"
  49 #include "../ctlr/function.h"
  50 #include "../ctlr/declare.h"
  51 #include "../sys_curses/telextrn.h"
  52
  53 #include "../api/astosc.h"
  54 #include "state.h"
  55 #include "externs.h"
  56 #include "map3270.h"
  57
  58 #include "../general/globals.h"
  59
  60 extern cc_t escape;                     /* Escape to command mode */
  61
  62 #define IsControl(c)    (!isprint((unsigned char)c) || (isspace((unsigned char)c) && ((c) != ' ')))
  63
  64 #define NextState(x)    (x->next)
  65 \f
  66 /* XXX temporary - hard code in the state table */
  67
  68 #define MATCH_ANY 0xff                  /* actually, match any character */
  69
  70 \f
  71 static unsigned char
  72         ourBuffer[100],         /* where we store stuff */
  73         *ourPHead = ourBuffer,  /* first character in buffer */
  74         *ourPTail = ourBuffer,  /* where next character goes */
  75         *TransPointer = 0;      /* For transparent mode data */
  76
  77 static int InControl;
  78 static int WaitingForSynch;
  79
  80 static struct astosc
  81         *spacePTR = 0;          /* Space is hard to enter */
  82
  83 static state
  84         *headOfControl = 0;     /* where we enter code state table */
  85
  86 #define FullChar        ((ourPTail+5) >= ourBuffer+sizeof ourBuffer)
  87 #define EmptyChar       (ourPTail == ourPHead)
  88
  89
  90 static void AddChar(int);
  91 static void FlushChar(void);
  92
  93 \f
  94 /*
  95  * init_keyboard()
  96  *
  97  * Initialize the keyboard variables.
  98  */
  99
 100 void
 101 init_keyboard()
 102 {
 103     ourPHead = ourPTail = ourBuffer;
 104     InControl = 0;
 105     WaitingForSynch = 0;
 106 }
 107
 108
 109 /*
 110  * Initialize the keyboard mapping file.
 111  */
 112
 113 void
 114 InitMapping()
 115 {
 116     struct astosc *ptr;
 117
 118     if (!headOfControl) {
 119         /* need to initialize */
 120         headOfControl = InitControl((char *)0, 0, ascii_to_index);
 121         if (!headOfControl) {           /* should not occur */
 122             quit(0, NULL);
 123         }
 124         for (ptr = &astosc[0]; ptr <= &astosc[highestof(astosc)]; ptr++) {
 125             if (ptr->function == FCN_SPACE) {
 126                 spacePTR = ptr;
 127             }
 128         }
 129     }
 130 }
 131
 132
 133 /* AddChar - put a function index in our buffer */
 134
 135 static void
 136 AddChar(c)
 137 int     c;
 138 {
 139     if (!FullChar) {
 140         *ourPTail++ = c;
 141     } else {
 142         RingBell("Typeahead buffer full");
 143     }
 144 }
 145
 146 /* FlushChar - put everything where it belongs */
 147
 148 static void
 149 FlushChar()
 150 {
 151     ourPTail = ourBuffer;
 152     ourPHead = ourBuffer;
 153 }
 154
 155 /*ARGSUSED*/
 156 void
 157 TransInput(onoff, mode)
 158 int     mode;                   /* Which KIND of transparent input */
 159 int     onoff;                  /* Going in, or coming out */
 160 {
 161     if (onoff) {
 162         /* Flush pending input */
 163         FlushChar();
 164         TransPointer = ourBuffer;
 165     } else {
 166     }
 167 }
 168
 169 int
 170 TerminalIn()
 171 {
 172     /* send data from us to next link in stream */
 173     int work = 0;
 174     struct astosc *ptr;
 175
 176     while (!EmptyChar) {                        /* send up the link */
 177         if (*ourPHead == ' ') {
 178             ptr = spacePTR;
 179         } else {
 180             ptr = &astosc[*ourPHead];
 181         }
 182         if (AcceptKeystroke(ptr->scancode, ptr->shiftstate) == 1) {
 183             ourPHead++;
 184             work = 1;
 185         } else {
 186             break;
 187         }
 188     }
 189
 190     if (EmptyChar) {
 191         FlushChar();
 192     }
 193         /* return value answers question: "did we do anything useful?" */
 194     return work;
 195 }
 196
 197 int
 198 DataFromTerminal(buffer, count)
 199 char    *buffer;                /* the data read in */
 200 int     count;                  /* how many bytes in this buffer */
 201 {
 202     state *regControlPointer;
 203     int c;
 204     int result;
 205     int origCount;
 206     extern int bellwinup;
 207     static state *controlPointer;
 208
 209     if (TransPointer) {
 210         int i;
 211
 212         if ((count+TransPointer) >= (ourBuffer+sizeof ourBuffer)) {
 213             i = ourBuffer+sizeof ourBuffer-TransPointer;
 214         } else {
 215             i = count;
 216         }
 217         while (i--) {
 218             c = (*buffer++)&0x7f;
 219             *TransPointer++ = c|0x80;
 220             if (c == '\r') {
 221                 SendTransparent((char *)ourBuffer, TransPointer-ourBuffer);
 222                 TransPointer = 0;               /* Done */
 223                 break;
 224             }
 225         }
 226         return count;
 227     }
 228
 229     if (bellwinup) {
 230         BellOff();
 231     }
 232
 233     origCount = count;
 234
 235     while (count) {
 236         c = *buffer++&0x7f;
 237         count--;
 238
 239         if (c == escape) {
 240                 if (count && (*buffer&0x7f) == escape) {
 241                         buffer++;
 242                         count--;
 243                 } else {
 244                         command(0, (char *)0, 0);
 245                         RefreshScreen();
 246                         continue;
 247                 }
 248         }
 249
 250         if (!InControl && !IsControl(c)) {
 251             AddChar(c);                 /* add ascii character */
 252         } else {
 253             if (!InControl) {           /* first character of sequence */
 254                 InControl = 1;
 255                 controlPointer = headOfControl;
 256             }
 257             /* control pointer points to current position in state table */
 258             for (regControlPointer = controlPointer; ;
 259                         regControlPointer = NextState(regControlPointer)) {
 260                 if (!regControlPointer) {       /* ran off end */
 261                     RingBell("Invalid control sequence");
 262                     regControlPointer = headOfControl;
 263                     InControl = 0;
 264                     count = 0;          /* Flush current input */
 265                     break;
 266                 }
 267                 if ((regControlPointer->match == c) /* hit this character */
 268                         || (regControlPointer->match == MATCH_ANY)) {
 269                     result = regControlPointer->result;
 270                     if (result == STATE_GOTO) {
 271                         regControlPointer = regControlPointer->address;
 272                         break;                  /* go to next character */
 273                     }
 274                     if (WaitingForSynch) {
 275                         if (astosc[result].function == FCN_SYNCH) {
 276                             WaitingForSynch = 0;
 277                         } else {
 278                             RingBell("Need to type synch character");
 279                         }
 280                     }
 281                     else if (astosc[result].function == FCN_FLINP) {
 282                         FlushChar();            /* Don't add FLINP */
 283                     } else {
 284                         if (astosc[result].function == FCN_MASTER_RESET) {
 285                             FlushChar();
 286                         }
 287                         AddChar(result);                /* add this code */
 288                     }
 289                     InControl = 0;      /* out of control now */
 290                     break;
 291                 }
 292             }
 293             controlPointer = regControlPointer;         /* save state */
 294         }
 295     }
 296     (void) TerminalIn();                        /* try to send data */
 297     return(origCount-count);
 298 }