adamdunkels | a2f3c42 | 2004-09-12 20:24:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, Adam Dunkels. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of the Institute nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * This file is part of the Contiki operating system. |
| 30 | * |
| 31 | * Author: Adam Dunkels <adam@sics.se> |
| 32 | * |
| 33 | * $Id: ctk-term-in.c,v 1.2 2004/09/12 20:24:55 adamdunkels Exp $ |
| 34 | */ |
adamdunkels | b9614dc | 2004-08-09 20:33:51 +0000 | [diff] [blame] | 35 | #include <string.h> |
| 36 | #include "ctk.h" |
| 37 | #include "ctk-term.h" |
| 38 | #include "ctk-term-int.h" |
| 39 | #include "ctk-term-ascii.h" |
| 40 | |
| 41 | #define PRINTF(x) |
| 42 | |
| 43 | /*-----------------------------------------------------------------------------------*/ |
| 44 | /* |
| 45 | * #defines and enums |
| 46 | */ |
| 47 | /*-----------------------------------------------------------------------------------*/ |
| 48 | |
| 49 | /* Size of input key buffer */ |
| 50 | #define NUMKEYS 20 |
| 51 | |
| 52 | /* ANSI character classes */ |
| 53 | enum {ACC_C0, ACC_INTERM, ACC_PARAM, ACC_LOWCASE, ACC_UPCASE,ACC_C1, ACC_G1, ACC_DEL, ACC_SPEC }; |
| 54 | |
| 55 | /*-----------------------------------------------------------------------------------*/ |
| 56 | /* |
| 57 | * Structures |
| 58 | */ |
| 59 | /*-----------------------------------------------------------------------------------*/ |
| 60 | |
| 61 | /* Structure for mapping a character sequence to a key */ |
| 62 | struct seqmap |
| 63 | { |
| 64 | const char* seq; |
| 65 | const ctk_arch_key_t key; |
| 66 | }; |
| 67 | |
| 68 | /*-----------------------------------------------------------------------------------*/ |
| 69 | /* |
| 70 | * Local variables |
| 71 | */ |
| 72 | /*-----------------------------------------------------------------------------------*/ |
| 73 | |
| 74 | static ctk_arch_key_t keys[NUMKEYS]; |
| 75 | static int firstkey, lastkey; |
| 76 | |
| 77 | /* Sequences starting with ESC [ .... */ |
| 78 | const static struct seqmap ctrlmap[] = |
| 79 | { |
| 80 | {"A",CH_CURS_UP}, |
| 81 | {"B",CH_CURS_DOWN}, |
| 82 | {"C",CH_CURS_RIGHT}, |
| 83 | {"D",CH_CURS_LEFT}, |
| 84 | |
| 85 | {"11~",CH_F1}, |
| 86 | {"12~",CH_F2}, |
| 87 | {"13~",CH_F3}, |
| 88 | {"14~",CH_F4}, |
| 89 | // linux console |
| 90 | {"[A",CH_F1}, |
| 91 | {"[B",CH_F2}, |
| 92 | {"[C",CH_F3}, |
| 93 | {"[D",CH_F4}, |
| 94 | {0,0} |
| 95 | }; |
| 96 | |
| 97 | /* Sequences starting with ESC O .... */ |
| 98 | const static struct seqmap ss3map[] = |
| 99 | { |
| 100 | {"A",CH_CURS_UP}, |
| 101 | {"B",CH_CURS_DOWN}, |
| 102 | {"C",CH_CURS_RIGHT}, |
| 103 | {"D",CH_CURS_LEFT}, |
| 104 | {"P",CH_F1}, |
| 105 | {"Q",CH_F2}, |
| 106 | {"R",CH_F3}, |
| 107 | {"S",CH_F4}, |
| 108 | {0,0} |
| 109 | }; |
| 110 | |
| 111 | |
| 112 | /*-----------------------------------------------------------------------------------*/ |
| 113 | /* |
| 114 | * Add a key to the input buffer |
| 115 | */ |
| 116 | /*-----------------------------------------------------------------------------------*/ |
| 117 | static void |
| 118 | enqueue_key(ctk_arch_key_t k) |
| 119 | { |
| 120 | keys[lastkey] = k; |
| 121 | ++lastkey; |
| 122 | if(lastkey >= NUMKEYS) { |
| 123 | lastkey = 0; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /*-----------------------------------------------------------------------------------*/ |
| 128 | /* |
| 129 | * Classify a character |
| 130 | */ |
| 131 | /*-----------------------------------------------------------------------------------*/ |
| 132 | static unsigned char |
| 133 | classify(unsigned char c) |
| 134 | { |
| 135 | if (0x00 <= c && c <=0x1f) return ACC_C0; |
| 136 | if (0x20 <= c && c <=0x2f) return ACC_INTERM; |
| 137 | if (0x30 <= c && c <=0x3f) return ACC_PARAM; |
| 138 | if (0x40 <= c && c <=0x5f) return ACC_UPCASE; |
| 139 | if (0x60 <= c && c <=0x7e) return ACC_LOWCASE; |
| 140 | if (c == 0x7f) return ACC_DEL; |
| 141 | if (0x90 <= c && c <=0x9f) return ACC_C1; |
| 142 | if (c == 0xa0) return ACC_SPEC; |
| 143 | if (0xA1 <= c && c <=0xfe) return ACC_G1; |
| 144 | if (0x90 <= c && c <=0x9f) return ACC_C1; |
| 145 | if (c == 0xff) return ACC_SPEC; |
| 146 | return ACC_SPEC; |
| 147 | } |
| 148 | |
| 149 | /*-----------------------------------------------------------------------------------*/ |
| 150 | /* |
| 151 | * Lookup a key sequence in a sequencemap and queue the key if sequence found |
| 152 | */ |
| 153 | /*-----------------------------------------------------------------------------------*/ |
| 154 | static void |
| 155 | lookup_seq(const char* str, const struct seqmap* map) |
| 156 | { |
| 157 | while (map->seq != 0) { |
| 158 | if (strcmp(str,map->seq) == 0) { |
| 159 | enqueue_key(map->key); |
| 160 | return; |
| 161 | } |
| 162 | map++; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | /*-----------------------------------------------------------------------------------*/ |
| 167 | /* \internal |
| 168 | * Parse a character stream |
| 169 | * Returns -1 if c is consumed by the state machine 1 else. |
| 170 | */ |
| 171 | /*-----------------------------------------------------------------------------------*/ |
| 172 | static int |
| 173 | parse_input(struct ctk_term_state* st, unsigned char c) |
| 174 | { |
| 175 | unsigned char cl = classify(c); |
| 176 | int ret = -1; |
| 177 | switch(st->inputstate) { |
| 178 | case ANS_IDLE: |
| 179 | switch(cl) { |
| 180 | case ACC_C0: |
| 181 | { |
| 182 | switch(c) { |
| 183 | case ASCII_ESC: st->inputstate = ANS_ESCSEQ; break; |
| 184 | case ASCII_BS: enqueue_key(CH_DEL); break; |
| 185 | case ASCII_HT: enqueue_key(CH_TAB); break; |
| 186 | case ASCII_FF: ctk_term_redraw(st); break; |
| 187 | case ASCII_CR: enqueue_key(CH_ENTER); break; |
| 188 | } |
| 189 | } |
| 190 | break; |
| 191 | |
| 192 | case ACC_INTERM: |
| 193 | case ACC_PARAM: |
| 194 | case ACC_LOWCASE: |
| 195 | case ACC_UPCASE: |
| 196 | case ACC_G1: |
| 197 | ret = 1; |
| 198 | break; |
| 199 | case ACC_C1: |
| 200 | if (c == ASCII_CSI) { |
| 201 | st->inputstate = ANS_CTRLSEQ; |
| 202 | st->ctrlCnt = 0; |
| 203 | } |
| 204 | else if (c == ASCII_SS3) { |
| 205 | st->inputstate = ANS_SS3; |
| 206 | st->ctrlCnt = 0; |
| 207 | } |
| 208 | break; |
| 209 | case ACC_DEL: |
| 210 | enqueue_key(CH_DEL); |
| 211 | break; |
| 212 | case ACC_SPEC: |
| 213 | break; |
| 214 | } |
| 215 | break; |
| 216 | |
| 217 | case ANS_ESCSEQ: |
| 218 | { |
| 219 | switch(cl) { |
| 220 | case ACC_C0: |
| 221 | case ACC_DEL: |
| 222 | break; |
| 223 | case ACC_INTERM: |
| 224 | st->inputstate = ANS_ESCSEQ_1; |
| 225 | break; |
| 226 | case ACC_UPCASE: |
| 227 | /* C1 control character */ |
| 228 | if (c == '[') { |
| 229 | st->inputstate = ANS_CTRLSEQ; |
| 230 | st->ctrlCnt = 0; |
| 231 | } |
| 232 | else if (c == 'O') { |
| 233 | st->inputstate = ANS_SS3; |
| 234 | st->ctrlCnt = 0; |
| 235 | } |
| 236 | else { |
| 237 | st->inputstate = ANS_IDLE; |
| 238 | } |
| 239 | break; |
| 240 | case ACC_PARAM: |
| 241 | /* Private 2-character sequence */ |
| 242 | case ACC_LOWCASE: |
| 243 | /* Standard 2-character sequence */ |
| 244 | default: |
| 245 | st->inputstate = ANS_IDLE; |
| 246 | break; |
| 247 | } |
| 248 | } |
| 249 | break; |
| 250 | |
| 251 | case ANS_ESCSEQ_1: |
| 252 | { |
| 253 | switch(cl) { |
| 254 | case ACC_C0: |
| 255 | case ACC_INTERM: |
| 256 | break; |
| 257 | case ACC_PARAM: |
| 258 | /* Private function*/ |
| 259 | case ACC_LOWCASE: |
| 260 | case ACC_UPCASE: |
| 261 | /* Standard function */ |
| 262 | default: |
| 263 | st->inputstate = ANS_IDLE; |
| 264 | break; |
| 265 | } |
| 266 | } |
| 267 | break; |
| 268 | case ANS_SS3: |
| 269 | { |
| 270 | switch(cl) { |
| 271 | case ACC_PARAM: |
| 272 | if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c; |
| 273 | break; |
| 274 | case ACC_UPCASE: |
| 275 | /* VT100 PF seq */ |
| 276 | if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c; |
| 277 | st->inputstate = ANS_IDLE; |
| 278 | st->ctrlbuf[st->ctrlCnt] = 0; |
| 279 | lookup_seq((const char*)(st->ctrlbuf), ss3map); |
| 280 | break; |
| 281 | default: |
| 282 | st->inputstate = ANS_IDLE; |
| 283 | break; |
| 284 | } |
| 285 | } |
| 286 | break; |
| 287 | case ANS_CTRLSEQ: |
| 288 | { |
| 289 | switch(cl) { |
| 290 | case ACC_C0: |
| 291 | break; |
| 292 | case ACC_INTERM: |
| 293 | case ACC_PARAM: |
| 294 | if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c; |
| 295 | break; |
| 296 | case ACC_LOWCASE: |
| 297 | case ACC_UPCASE: |
| 298 | /* Standard control sequence */ |
| 299 | if (st->ctrlCnt < CTK_TERM_CTRLBUFLEN) st->ctrlbuf[st->ctrlCnt++]=c; |
| 300 | /* Cygwin console sends ESC [ [ A for function keys */ |
| 301 | if (c != '[') { |
| 302 | st->ctrlbuf[st->ctrlCnt] = 0; |
| 303 | lookup_seq((const char*)(st->ctrlbuf), ctrlmap); |
| 304 | st->inputstate = ANS_IDLE; |
| 305 | } |
| 306 | break; |
| 307 | default: |
| 308 | st->inputstate = ANS_IDLE; |
| 309 | break; |
| 310 | } |
| 311 | } |
| 312 | break; |
| 313 | } |
| 314 | return ret; |
| 315 | } |
| 316 | |
| 317 | /*-----------------------------------------------------------------------------------*/ |
| 318 | /* |
| 319 | * Initialize the input buffer |
| 320 | */ |
| 321 | /*-----------------------------------------------------------------------------------*/ |
| 322 | void ctk_term_input_init() |
| 323 | { |
| 324 | firstkey = lastkey = 0; |
| 325 | } |
| 326 | |
| 327 | /*-----------------------------------------------------------------------------------*/ |
| 328 | /** |
| 329 | * Handles an input character provided by the client |
| 330 | * |
| 331 | * \param ts State information |
| 332 | * \param b Input character |
| 333 | */ |
| 334 | /*-----------------------------------------------------------------------------------*/ |
| 335 | void ctk_term_input(struct ctk_term_state* ts, unsigned char b) |
| 336 | { |
| 337 | int ret = parse_input(ts, b); |
| 338 | PRINTF(("terminput: 0x%02x\n", b)); |
| 339 | if (ret > 0) { |
| 340 | enqueue_key((ctk_arch_key_t)b); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /*-----------------------------------------------------------------------------------*/ |
| 345 | /** |
| 346 | * Checks the key press input queue to see if there are pending |
| 347 | * keys. Called by the CTK module. |
| 348 | * |
| 349 | * \return Zero if no key presses are in buffer, non-zero if there are |
| 350 | * key presses in input buffer. |
| 351 | */ |
| 352 | /*-----------------------------------------------------------------------------------*/ |
| 353 | unsigned char |
| 354 | ctk_arch_keyavail(void) |
| 355 | { |
| 356 | return firstkey != lastkey; |
| 357 | } |
| 358 | /*-----------------------------------------------------------------------------------*/ |
| 359 | /** |
| 360 | * Retrieves key presses from the VNC client. Called by the CTK |
| 361 | * module. |
| 362 | * |
| 363 | * \return The next key in the input queue. |
| 364 | */ |
| 365 | /*-----------------------------------------------------------------------------------*/ |
| 366 | ctk_arch_key_t |
| 367 | ctk_arch_getkey(void) |
| 368 | { |
| 369 | ctk_arch_key_t key; |
| 370 | key = keys[firstkey]; |
| 371 | |
| 372 | if(firstkey != lastkey) { |
| 373 | ++firstkey; |
| 374 | if(firstkey >= NUMKEYS) { |
| 375 | firstkey = 0; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | return key; |
| 380 | } |
| 381 | |