Source:NetHack 2.2a/unixtty.c
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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
Screenshots and source code from Hack are used under the CWI license.
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 <stdio.h> 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 <termio.h> 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 <sgtty.h> 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('\n'); 153. exit(1); 154. } 155. 156. /* 157. * Read a line closed with '\n' into the array char bufp[BUFSZ]. 158. * (The '\n' 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 == '\n') { 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('\n'); 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()) != '\n') { 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?\n"); 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 == '\n') { 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