Source:NetHack 1.4f/unixtty.c
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Below is the full text to unixtty.c from the source code of NetHack 1.4f. To link to a particular line, write [[NetHack 1.4f/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 1.4 87/08/08 2. /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 3. /* tty.c - (Unix) version 1.0.3 */ 4. /* With thanks to the people who sent code for SYSV - hpscdi!jon, 5. arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */ 6. 7. #include <stdio.h> 8. #include "extern.h" 9. #include "flag.h" 10. #include "func_tab.h" 11. 12. #define ON 1 13. #define OFF 0 14. #define BUFSZ 256 15. 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. #define STTY(x) (ioctl(0, TCSETA, x)) /* TCSETAF? TCSETAW? */ 51. 52. #else /* V7 */ 53. 54. #include <sgtty.h> 55. #define termstruct sgttyb 56. #define kill_sym sg_kill 57. #define erase_sym sg_erase 58. #define EXTABS XTABS 59. #define tabflgs sg_flags 60. #define echoflgs sg_flags 61. #define cbrkflgs sg_flags 62. #define CBRKMASK CBREAK 63. #define CBRKON /* empty */ 64. #define OSPEED(x) (x).sg_ospeed 65. #define GTTY(x) (gtty(0, x)) 66. #define STTY(x) (stty(0, x)) 67. 68. #endif 69. 70. extern short ospeed; 71. static char erase_char, kill_char; 72. static boolean settty_needed = FALSE; 73. struct termstruct inittyb, curttyb; 74. 75. /* 76. * Get initial state of terminal, set ospeed (for termcap routines) 77. * and switch off tab expansion if necessary. 78. * Called by startup() in termcap.c and after returning from ! or ^Z 79. */ 80. gettty(){ 81. if(GTTY(&inittyb) < 0) 82. perror("Hack (gettty)"); 83. curttyb = inittyb; 84. ospeed = OSPEED(inittyb); 85. erase_char = inittyb.erase_sym; 86. kill_char = inittyb.kill_sym; 87. getioctls(); 88. 89. /* do not expand tabs - they might be needed inside a cm sequence */ 90. if(curttyb.tabflgs & EXTABS) { 91. curttyb.tabflgs &= ~EXTABS; 92. setctty(); 93. } 94. settty_needed = TRUE; 95. } 96. 97. /* reset terminal to original state */ 98. settty(s) char *s; { 99. clear_screen(); 100. end_screen(); 101. if(s) printf(s); 102. (void) fflush(stdout); 103. if(STTY(&inittyb) < 0) 104. perror("Hack (settty)"); 105. flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF; 106. flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF; 107. setioctls(); 108. } 109. 110. setctty(){ 111. if(STTY(&curttyb) < 0) 112. perror("Hack (setctty)"); 113. } 114. 115. 116. setftty(){ 117. register int ef = 0; /* desired value of flags & ECHO */ 118. register int cf = CBRKON(CBRKMASK); /* desired value of flags & CBREAK */ 119. register int change = 0; 120. flags.cbreak = ON; 121. flags.echo = OFF; 122. /* Should use (ECHO|CRMOD) here instead of ECHO */ 123. if((curttyb.echoflgs & ECHO) != ef){ 124. curttyb.echoflgs &= ~ECHO; 125. /* curttyb.echoflgs |= ef; */ 126. change++; 127. } 128. if((curttyb.cbrkflgs & CBRKMASK) != cf){ 129. curttyb.cbrkflgs &= ~CBRKMASK; 130. curttyb.cbrkflgs |= cf; 131. #ifdef USG 132. /* be satisfied with one character; no timeout */ 133. curttyb.c_cc[VMIN] = 1; /* was VEOF */ 134. curttyb.c_cc[VTIME] = 0; /* was VEOL */ 135. #endif 136. change++; 137. } 138. if(change){ 139. setctty(); 140. } 141. start_screen(); 142. } 143. 144. 145. /* fatal error */ 146. /*VARARGS1*/ 147. error(s,x,y) char *s; { 148. if(settty_needed) 149. settty((char *) 0); 150. printf(s,x,y); 151. putchar('\n'); 152. exit(1); 153. } 154. 155. /* 156. * Read a line closed with '\n' into the array char bufp[BUFSZ]. 157. * (The '\n' is not stored. The string is closed with a '\0'.) 158. * Reading can be interrupted by an escape ('\033') - now the 159. * resulting string is "\033". 160. */ 161. getlin(bufp) 162. register char *bufp; 163. { 164. register char *obufp = bufp; 165. register int c; 166. 167. flags.toplin = 2; /* nonempty, no --More-- required */ 168. for(;;) { 169. (void) fflush(stdout); 170. if((c = getchar()) == EOF) { 171. *bufp = 0; 172. return; 173. } 174. if(c == '\033') { 175. *obufp = c; 176. obufp[1] = 0; 177. return; 178. } 179. if(c == erase_char || c == '\b') { 180. if(bufp != obufp) { 181. bufp--; 182. putstr("\b \b"); /* putsym converts \b */ 183. } else bell(); 184. } else if(c == '\n') { 185. *bufp = 0; 186. return; 187. } else if(' ' <= c && c < '\177') { 188. /* avoid isprint() - some people don't have it 189. ' ' is not always a printing char */ 190. *bufp = c; 191. bufp[1] = 0; 192. putstr(bufp); 193. if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO) 194. bufp++; 195. } else if(c == kill_char || c == '\177') { /* Robert Viduya */ 196. /* this test last - @ might be the kill_char */ 197. while(bufp != obufp) { 198. bufp--; 199. putstr("\b \b"); 200. } 201. } else 202. bell(); 203. } 204. } 205. 206. getret() { 207. cgetret(""); 208. } 209. 210. cgetret(s) 211. register char *s; 212. { 213. putsym('\n'); 214. if(flags.standout) 215. standoutbeg(); 216. putstr("Hit "); 217. putstr(flags.cbreak ? "space" : "return"); 218. putstr(" to continue: "); 219. if(flags.standout) 220. standoutend(); 221. xwaitforspace(s); 222. } 223. 224. char morc; /* tell the outside world what char he used */ 225. 226. xwaitforspace(s) 227. register char *s; /* chars allowed besides space or return */ 228. { 229. register int c; 230. 231. morc = 0; 232. 233. while((c = readchar()) != '\n') { 234. if(flags.cbreak) { 235. if(c == ' ') break; 236. if(s && index(s,c)) { 237. morc = c; 238. break; 239. } 240. bell(); 241. } 242. } 243. } 244. 245. static int last_multi; 246. 247. char * 248. parse() 249. { 250. static char inline[COLNO]; 251. register foo; 252. 253. multi = 0; 254. flags.move = 1; 255. if(!Invisible) curs_on_u(); else home(); 256. while((foo = readchar()) >= '0' && foo <= '9') { 257. multi = 10*multi+foo-'0'; 258. #ifdef DGKMOD 259. if (multi < 0 || multi > LARGEST_INT) 260. multi = LARGEST_INT; 261. if (multi > 9) { 262. remember_topl(); 263. home(); 264. cl_end(); 265. printf("Count: %d", multi); 266. } 267. #endif 268. last_multi = multi; 269. } 270. # ifdef REDO 271. if (foo == DOAGAIN || in_doagain) 272. multi = last_multi; 273. else { 274. savech(0); /* reset input queue */ 275. savech(foo); 276. } 277. # endif 278. if(multi) { 279. multi--; 280. save_cm = inline; 281. } 282. inline[0] = foo; 283. inline[1] = 0; 284. if(foo == 'g' || foo == 'G'){ 285. inline[1] = getchar(); 286. #ifdef QUEST 287. if(inline[1] == foo) inline[2] = getchar(); else 288. #endif 289. inline[2] = 0; 290. } 291. if(foo == 'm' || foo == 'M'){ 292. inline[1] = getchar(); 293. inline[2] = 0; 294. } 295. clrlin(); 296. return(inline); 297. } 298. 299. char 300. readchar() { 301. register int sym; 302. 303. (void) fflush(stdout); 304. if((sym = getchar()) == EOF) 305. #ifdef NR_OF_EOFS 306. { /* 307. * Some SYSV systems seem to return EOFs for various reasons 308. * (?like when one hits break or for interrupted systemcalls?), 309. * and we must see several before we quit. 310. */ 311. register int cnt = NR_OF_EOFS; 312. while (cnt--) { 313. clearerr(stdin); /* omit if clearerr is undefined */ 314. if((sym = getchar()) != EOF) goto noteof; 315. } 316. end_of_input(); 317. noteof: ; 318. } 319. #else 320. end_of_input(); 321. #endif /* NR_OF_EOFS /**/ 322. if(flags.toplin == 1) 323. flags.toplin = 2; 324. return((char) sym); 325. } 326. 327. end_of_input() 328. { 329. settty("End of input?\n"); 330. clearlocks(); 331. exit(0); 332. } 333. 334. #ifdef COM_COMPL 335. /* Read in an extended command - doing command line completion for 336. * when enough character have been entered to make a unique command. 337. * This is just a modified getlin(). -jsb 338. */ 339. get_ext_cmd(bufp) 340. register char *bufp; 341. { 342. register char *obufp = bufp; 343. register int c; 344. int com_index, index; 345. 346. flags.toplin = 2; /* nonempty, no --More-- required */ 347. 348. for(;;) { 349. (void) fflush(stdout); 350. if((c = readchar()) == EOF) { 351. *bufp = 0; 352. return; 353. } 354. if(c == '\033') { 355. *obufp = c; 356. obufp[1] = 0; 357. return; 358. } 359. if(c == erase_char || c == '\b') { 360. if(bufp != obufp) { 361. bufp--; 362. putstr("\b \b"); /* putsym converts \b */ 363. } else bell(); 364. } else if(c == '\n') { 365. *bufp = 0; 366. return; 367. } else if(' ' <= c && c < '\177') { 368. /* avoid isprint() - some people don't have it 369. ' ' is not always a printing char */ 370. *bufp = c; 371. bufp[1] = 0; 372. index = 0; 373. com_index = -1; 374. 375. while(extcmdlist[index].ef_txt != (char *) 0){ 376. if(!strncmp(obufp, extcmdlist[index].ef_txt, 377. strlen(obufp))) 378. if(com_index == -1) /* No matches yet*/ 379. com_index = index; 380. else /* More than 1 match */ 381. com_index = -2; 382. index++; 383. } 384. if(com_index >= 0){ 385. strcpy(obufp, 386. extcmdlist[com_index].ef_txt); 387. /* finish print our string */ 388. putstr(bufp); 389. bufp = obufp; /* reset it */ 390. if(strlen(obufp) < BUFSIZ-1 && 391. strlen(obufp) < COLNO) 392. /* set bufp at the end of our 393. * string 394. */ 395. bufp += strlen(obufp); 396. } else { 397. putstr(bufp); 398. if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO) 399. bufp++; 400. } 401. } else if(c == kill_char || c == '\177') { /* Robert Viduya */ 402. /* this test last - @ might be the kill_char */ 403. while(bufp != obufp) { 404. bufp--; 405. putstr("\b \b"); 406. } 407. } else 408. bell(); 409. } 410. 411. } 412. #endif COM_COMPL