| abstract
| - Below is the full text to unixtty.c from the source code of NetHack 2.2a. To link to a particular line, write [[NetHack 2.2a/unixtty.c#line123]], for example. Warning! This is the source code from an old release. For the latest release, see Source code 1. /* SCCS Id: @(#)unixtty.c 2.1 87/11/09 2. /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 3. /* tty.c - (Unix) version */ 4. 5. /* With thanks to the people who sent code for SYSV - hpscdi!jon, 6. * arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. 7. */ 8. 9. #include 10. #include "extern.h" 11. #include "hack.h" 12. #include "func_tab.h" 13. 14. #define ON 1 15. #define OFF 0 16. 17. /* 18. * The distinctions here are not BSD - rest but rather USG - rest, as 19. * BSD still has the old sgttyb structure, but SYSV has termio. Thus: 20. */ 21. #ifdef BSD 22. #define V7 23. #else 24. #define USG 25. #endif 26. 27. /* 28. * Some systems may have getchar() return EOF for various reasons, and 29. * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs. 30. */ 31. #ifndef BSD 32. #define NR_OF_EOFS 20 33. #endif 34. 35. 36. #ifdef USG 37. 38. #include 39. #define termstruct termio 40. #define kill_sym c_cc[VKILL] 41. #define erase_sym c_cc[VERASE] 42. #define EXTABS TAB3 43. #define tabflgs c_oflag 44. #define echoflgs c_lflag 45. #define cbrkflgs c_lflag 46. #define CBRKMASK ICANON 47. #define CBRKON ! /* reverse condition */ 48. #define OSPEED(x) ((x).c_cflag & CBAUD) 49. #define GTTY(x) (ioctl(0, TCGETA, x)) 50. /* STTY now modified to run under Sys V R3. - may have to be #ifdef'ed */ 51. #define STTY(x) (ioctl(0, TCSETAW, x)) /* TCSETAF? TCSETAW? */ 52. 53. #else /* V7 */ 54. 55. #include 56. #define termstruct sgttyb 57. #define kill_sym sg_kill 58. #define erase_sym sg_erase 59. #define EXTABS XTABS 60. #define tabflgs sg_flags 61. #define echoflgs sg_flags 62. #define cbrkflgs sg_flags 63. #define CBRKMASK CBREAK 64. #define CBRKON /* empty */ 65. #define OSPEED(x) (x).sg_ospeed 66. #define GTTY(x) (gtty(0, x)) 67. #define STTY(x) (stty(0, x)) 68. 69. #endif 70. 71. extern short ospeed; 72. static char erase_char, kill_char; 73. static boolean settty_needed = FALSE; 74. struct termstruct inittyb, curttyb; 75. 76. /* 77. * Get initial state of terminal, set ospeed (for termcap routines) 78. * and switch off tab expansion if necessary. 79. * Called by startup() in termcap.c and after returning from ! or ^Z 80. */ 81. gettty(){ 82. if(GTTY(&inittyb) < 0) 83. perror("Hack (gettty)"); 84. curttyb = inittyb; 85. ospeed = OSPEED(inittyb); 86. erase_char = inittyb.erase_sym; 87. kill_char = inittyb.kill_sym; 88. getioctls(); 89. 90. /* do not expand tabs - they might be needed inside a cm sequence */ 91. if(curttyb.tabflgs & EXTABS) { 92. curttyb.tabflgs &= ~EXTABS; 93. setctty(); 94. } 95. settty_needed = TRUE; 96. } 97. 98. /* reset terminal to original state */ 99. settty(s) char *s; { 100. clear_screen(); 101. end_screen(); 102. if(s) printf(s); 103. (void) fflush(stdout); 104. if(STTY(&inittyb) < 0) 105. perror("Hack (settty)"); 106. flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF; 107. flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF; 108. setioctls(); 109. } 110. 111. setctty(){ 112. if(STTY(&curttyb) < 0) 113. perror("Hack (setctty)"); 114. } 115. 116. 117. setftty(){ 118. register int ef = 0; /* desired value of flags & ECHO */ 119. register int cf = CBRKON(CBRKMASK); /* desired value of flags & CBREAK */ 120. register int change = 0; 121. flags.cbreak = ON; 122. flags.echo = OFF; 123. /* Should use (ECHO|CRMOD) here instead of ECHO */ 124. if((curttyb.echoflgs & ECHO) != ef){ 125. curttyb.echoflgs &= ~ECHO; 126. /* curttyb.echoflgs |= ef; */ 127. change++; 128. } 129. if((curttyb.cbrkflgs & CBRKMASK) != cf){ 130. curttyb.cbrkflgs &= ~CBRKMASK; 131. curttyb.cbrkflgs |= cf; 132. #ifdef USG 133. /* be satisfied with one character; no timeout */ 134. curttyb.c_cc[VMIN] = 1; /* was VEOF */ 135. curttyb.c_cc[VTIME] = 0; /* was VEOL */ 136. #endif 137. change++; 138. } 139. if(change){ 140. setctty(); 141. } 142. start_screen(); 143. } 144. 145. 146. /* fatal error */ 147. /*VARARGS1*/ 148. error(s,x,y) char *s; { 149. if(settty_needed) 150. settty((char *) 0); 151. printf(s,x,y); 152. putchar('
'); 153. exit(1); 154. } 155. 156. /* 157. * Read a line closed with '
' into the array char bufp[BUFSZ]. 158. * (The '
' is not stored. The string is closed with a '\0'.) 159. * Reading can be interrupted by an escape ('\033') - now the 160. * resulting string is "\033". 161. */ 162. getlin(bufp) 163. register char *bufp; 164. { 165. register char *obufp = bufp; 166. register int c; 167. 168. flags.toplin = 2; /* nonempty, no --More-- required */ 169. for(;;) { 170. (void) fflush(stdout); 171. if((c = getchar()) == EOF) { 172. *bufp = 0; 173. return; 174. } 175. if(c == '\033') { 176. *obufp = c; 177. obufp[1] = 0; 178. return; 179. } 180. if(c == erase_char || c == '\b') { 181. if(bufp != obufp) { 182. bufp--; 183. putstr("\b \b"); /* putsym converts \b */ 184. } else bell(); 185. } else if(c == '
') { 186. *bufp = 0; 187. return; 188. } else if(' ' <= c && c < '\177') { 189. /* avoid isprint() - some people don't have it 190. ' ' is not always a printing char */ 191. *bufp = c; 192. bufp[1] = 0; 193. putstr(bufp); 194. if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO) 195. bufp++; 196. } else if(c == kill_char || c == '\177') { /* Robert Viduya */ 197. /* this test last - @ might be the kill_char */ 198. while(bufp != obufp) { 199. bufp--; 200. putstr("\b \b"); 201. } 202. } else 203. bell(); 204. } 205. } 206. 207. getret() { 208. cgetret(""); 209. } 210. 211. cgetret(s) 212. register char *s; 213. { 214. putsym('
'); 215. if(flags.standout) 216. standoutbeg(); 217. putstr("Hit "); 218. putstr(flags.cbreak ? "space" : "return"); 219. putstr(" to continue: "); 220. if(flags.standout) 221. standoutend(); 222. xwaitforspace(s); 223. } 224. 225. char morc; /* tell the outside world what char he used */ 226. 227. xwaitforspace(s) 228. register char *s; /* chars allowed besides space or return */ 229. { 230. register int c; 231. 232. morc = 0; 233. 234. while((c = readchar()) != '
') { 235. if(flags.cbreak) { 236. if(c == ' ') break; 237. if(s && index(s,c)) { 238. morc = c; 239. break; 240. } 241. bell(); 242. } 243. } 244. } 245. 246. static int last_multi; 247. 248. char * 249. parse() 250. { 251. static char inline[COLNO]; 252. register foo; 253. 254. multi = 0; 255. flags.move = 1; 256. if(!Invisible) curs_on_u(); else home(); 257. while((foo = readchar()) >= '0' && foo <= '9') { 258. multi = 10*multi+foo-'0'; 259. #ifdef DGKMOD 260. if (multi < 0 || multi > LARGEST_INT) 261. multi = LARGEST_INT; 262. if (multi > 9) { 263. remember_topl(); 264. home(); 265. cl_end(); 266. printf("Count: %d", multi); 267. } 268. #endif 269. last_multi = multi; 270. } 271. # ifdef REDO 272. if (foo == DOAGAIN || in_doagain) 273. multi = last_multi; 274. else { 275. savech(0); /* reset input queue */ 276. savech(foo); 277. } 278. # endif 279. if(multi) { 280. multi--; 281. save_cm = inline; 282. } 283. inline[0] = foo; 284. inline[1] = 0; 285. if(foo == 'g' || foo == 'G'){ 286. inline[1] = getchar(); 287. #ifdef QUEST 288. if(inline[1] == foo) inline[2] = getchar(); else 289. #endif 290. inline[2] = 0; 291. } 292. if(foo == 'm' || foo == 'M'){ 293. inline[1] = getchar(); 294. inline[2] = 0; 295. } 296. clrlin(); 297. return(inline); 298. } 299. 300. char 301. readchar() { 302. register int sym; 303. 304. (void) fflush(stdout); 305. if((sym = getchar()) == EOF) 306. #ifdef NR_OF_EOFS 307. { /* 308. * Some SYSV systems seem to return EOFs for various reasons 309. * (?like when one hits break or for interrupted systemcalls?), 310. * and we must see several before we quit. 311. */ 312. register int cnt = NR_OF_EOFS; 313. while (cnt--) { 314. clearerr(stdin); /* omit if clearerr is undefined */ 315. if((sym = getchar()) != EOF) goto noteof; 316. } 317. end_of_input(); 318. noteof: ; 319. } 320. #else 321. end_of_input(); 322. #endif /* NR_OF_EOFS /**/ 323. if(flags.toplin == 1) 324. flags.toplin = 2; 325. return((char) sym); 326. } 327. 328. end_of_input() 329. { 330. settty("End of input?
"); 331. clearlocks(); 332. exit(0); 333. } 334. 335. #ifdef COM_COMPL 336. /* Read in an extended command - doing command line completion for 337. * when enough character have been entered to make a unique command. 338. * This is just a modified getlin(). -jsb 339. */ 340. get_ext_cmd(bufp) 341. register char *bufp; 342. { 343. register char *obufp = bufp; 344. register int c; 345. int com_index, index; 346. 347. flags.toplin = 2; /* nonempty, no --More-- required */ 348. 349. for(;;) { 350. (void) fflush(stdout); 351. if((c = readchar()) == EOF) { 352. *bufp = 0; 353. return; 354. } 355. if(c == '\033') { 356. *obufp = c; 357. obufp[1] = 0; 358. return; 359. } 360. if(c == erase_char || c == '\b') { 361. if(bufp != obufp) { 362. bufp--; 363. putstr("\b \b"); /* putsym converts \b */ 364. } else bell(); 365. } else if(c == '
') { 366. *bufp = 0; 367. return; 368. } else if(' ' <= c && c < '\177') { 369. /* avoid isprint() - some people don't have it 370. ' ' is not always a printing char */ 371. *bufp = c; 372. bufp[1] = 0; 373. index = 0; 374. com_index = -1; 375. 376. while(extcmdlist[index].ef_txt != (char *) 0){ 377. if(!strncmp(obufp, extcmdlist[index].ef_txt, 378. strlen(obufp))) 379. if(com_index == -1) /* No matches yet*/ 380. com_index = index; 381. else /* More than 1 match */ 382. com_index = -2; 383. index++; 384. } 385. if(com_index >= 0){ 386. strcpy(obufp, 387. extcmdlist[com_index].ef_txt); 388. /* finish print our string */ 389. putstr(bufp); 390. bufp = obufp; /* reset it */ 391. if(strlen(obufp) < BUFSIZ-1 && 392. strlen(obufp) < COLNO) 393. /* set bufp at the end of our 394. * string 395. */ 396. bufp += strlen(obufp); 397. } else { 398. putstr(bufp); 399. if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO) 400. bufp++; 401. } 402. } else if(c == kill_char || c == '\177') { /* Robert Viduya */ 403. /* this test last - @ might be the kill_char */ 404. while(bufp != obufp) { 405. bufp--; 406. putstr("\b \b"); 407. } 408. } else 409. bell(); 410. } 411. 412. } 413. #endif COM_COMPL
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