1 /* vi:set ts=8 sts=4 sw=4: 2 * 3 * VIM - Vi IMproved by Bram Moolenaar 4 * VMS port by Henk Elbers 5 * VMS deport by Zoltan Arpadffy 6 * 7 * Do ":help uganda" in Vim to read copying and usage conditions. 8 * Do ":help credits" in Vim to see a list of people who contributed. 9 * See README.txt for an overview of the Vim source code. 10 */ 11 12 #include "vim.h" 13 14 /* define _generic_64 for use in time functions */ 15 #if !defined(VAX) && !defined(PROTO) 16 # include <gen64def.h> 17 #else 18 /* based on Alpha's gen64def.h; the file is absent on VAX */ 19 typedef struct _generic_64 { 20 # pragma __nomember_alignment 21 __union { /* You can treat me as... */ 22 /* long long is not available on VAXen */ 23 /* unsigned __int64 gen64$q_quadword; ...a single 64-bit value, or */ 24 25 unsigned int gen64$l_longword [2]; /* ...two 32-bit values, or */ 26 unsigned short int gen64$w_word [4]; /* ...four 16-bit values */ 27 } gen64$r_quad_overlay; 28 } GENERIC_64; 29 #endif 30 31 typedef struct 32 { 33 char class; 34 char type; 35 short width; 36 union 37 { 38 struct 39 { 40 char _basic[3]; 41 char length; 42 } y; 43 int basic; 44 } x; 45 int extended; 46 } TT_MODE; 47 48 typedef struct 49 { 50 short buflen; 51 short itemcode; 52 char *bufadrs; 53 int *retlen; 54 } ITEM; 55 56 typedef struct 57 { 58 ITEM equ; 59 int nul; 60 } ITMLST1; 61 62 typedef struct 63 { 64 ITEM index; 65 ITEM string; 66 int nul; 67 } ITMLST2; 68 69 static TT_MODE orgmode; 70 static short iochan; /* TTY I/O channel */ 71 static short iosb[4]; /* IO status block */ 72 73 static int vms_match_num = 0; 74 static int vms_match_free = 0; 75 static char_u **vms_fmatch = NULL; 76 static char *Fspec_Rms; /* rms file spec, passed implicitly between routines */ 77 78 79 80 static TT_MODE get_tty __ARGS((void)); 81 static void set_tty __ARGS((int row, int col)); 82 83 #define EXPL_ALLOC_INC 64 84 85 #define EQN(S1,S2,LN) (strncmp(S1,S2,LN) == 0) 86 #define SKIP_FOLLOWING_SLASHES(Str) while (Str[1] == '/') ++Str 87 88 89 /* 90 * vul_desc vult een descriptor met een string en de lengte 91 * hier van. 92 */ 93 static void 94 vul_desc(DESC *des, char *str) 95 { 96 des->dsc$b_dtype = DSC$K_DTYPE_T; 97 des->dsc$b_class = DSC$K_CLASS_S; 98 des->dsc$a_pointer = str; 99 des->dsc$w_length = str ? strlen(str) : 0; 100 } 101 102 /* 103 * vul_item vult een item met een aantal waarden 104 */ 105 static void 106 vul_item(ITEM *itm, short len, short cod, char *adr, int *ret) 107 { 108 itm->buflen = len; 109 itm->itemcode = cod; 110 itm->bufadrs = adr; 111 itm->retlen = ret; 112 } 113 114 void 115 mch_settmode(int tmode) 116 { 117 int status; 118 119 if ( tmode == TMODE_RAW ) 120 set_tty(0, 0); 121 else{ 122 switch (orgmode.width) 123 { 124 case 132: OUT_STR_NF((char_u *)"\033[?3h\033>"); break; 125 case 80: OUT_STR_NF((char_u *)"\033[?3l\033>"); break; 126 default: break; 127 } 128 out_flush(); 129 status = sys$qiow(0, iochan, IO$_SETMODE, iosb, 0, 0, 130 &orgmode, sizeof(TT_MODE), 0,0,0,0); 131 if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL) 132 return; 133 (void)sys$dassgn(iochan); 134 iochan = 0; 135 } 136 } 137 138 static void 139 set_tty(int row, int col) 140 { 141 int status; 142 TT_MODE newmode; /* New TTY mode bits */ 143 static short first_time = TRUE; 144 145 if (first_time) 146 { 147 orgmode = get_tty(); 148 first_time = FALSE; 149 } 150 newmode = get_tty(); 151 if (col) 152 newmode.width = col; 153 if (row) 154 newmode.x.y.length = row; 155 newmode.x.basic |= (TT$M_NOECHO | TT$M_HOSTSYNC); 156 newmode.x.basic &= ~TT$M_TTSYNC; 157 newmode.extended |= TT2$M_PASTHRU; 158 status = sys$qiow(0, iochan, IO$_SETMODE, iosb, 0, 0, 159 &newmode, sizeof(newmode), 0, 0, 0, 0); 160 if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL) 161 return; 162 } 163 164 static TT_MODE 165 get_tty(void) 166 { 167 168 static $DESCRIPTOR(odsc,"SYS$OUTPUT"); /* output descriptor */ 169 170 int status; 171 TT_MODE tt_mode; 172 173 if (!iochan) 174 status = sys$assign(&odsc,&iochan,0,0); 175 176 status = sys$qiow(0, iochan, IO$_SENSEMODE, iosb, 0, 0, 177 &tt_mode, sizeof(tt_mode), 0, 0, 0, 0); 178 if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL) 179 { 180 tt_mode.width = 0; 181 tt_mode.type = 0; 182 tt_mode.class = 0; 183 tt_mode.x.basic = 0; 184 tt_mode.x.y.length = 0; 185 tt_mode.extended = 0; 186 } 187 return(tt_mode); 188 } 189 190 /* 191 * Get the current window size in Rows and Columns. 192 */ 193 int 194 mch_get_shellsize(void) 195 { 196 TT_MODE tmode; 197 198 tmode = get_tty(); /* get size from VMS */ 199 Columns = tmode.width; 200 Rows = tmode.x.y.length; 201 return OK; 202 } 203 204 /* 205 * Try to set the window size to Rows and new_Columns. 206 */ 207 void 208 mch_set_shellsize(void) 209 { 210 set_tty(Rows, Columns); 211 switch (Columns) 212 { 213 case 132: OUT_STR_NF((char_u *)"\033[?3h\033>"); break; 214 case 80: OUT_STR_NF((char_u *)"\033[?3l\033>"); break; 215 default: break; 216 } 217 out_flush(); 218 screen_start(); 219 } 220 221 char_u * 222 mch_getenv(char_u *lognam) 223 { 224 DESC d_file_dev, d_lognam ; 225 static char buffer[LNM$C_NAMLENGTH+1]; 226 char_u *cp = NULL; 227 unsigned long attrib; 228 int lengte = 0, dum = 0, idx = 0; 229 ITMLST2 itmlst; 230 char *sbuf = NULL; 231 232 vul_desc(&d_lognam, (char *)lognam); 233 vul_desc(&d_file_dev, "LNM$FILE_DEV"); 234 attrib = LNM$M_CASE_BLIND; 235 vul_item(&itmlst.index, sizeof(int), LNM$_INDEX, (char *)&idx, &dum); 236 vul_item(&itmlst.string, LNM$C_NAMLENGTH, LNM$_STRING, buffer, &lengte); 237 itmlst.nul = 0; 238 if (sys$trnlnm(&attrib, &d_file_dev, &d_lognam, NULL,&itmlst) == SS$_NORMAL) 239 { 240 buffer[lengte] = '\0'; 241 if (cp = (char_u *)alloc((unsigned)(lengte+1))) 242 strcpy((char *)cp, buffer); 243 return(cp); 244 } 245 else if ((sbuf = getenv((char *)lognam))) 246 { 247 lengte = strlen(sbuf) + 1; 248 cp = (char_u *)alloc((size_t)lengte); 249 if (cp) 250 strcpy((char *)cp, sbuf); 251 return cp; 252 } 253 else 254 return(NULL); 255 } 256 257 /* 258 * mch_setenv VMS version of setenv() 259 */ 260 int 261 mch_setenv(char *var, char *value, int x) 262 { 263 int res, dum; 264 long attrib = 0L; 265 char acmode = PSL$C_SUPER; /* needs SYSNAM privilege */ 266 DESC tabnam, lognam; 267 ITMLST1 itmlst; 268 269 vul_desc(&tabnam, "LNM$JOB"); 270 vul_desc(&lognam, var); 271 vul_item(&itmlst.equ, value ? strlen(value) : 0, value ? LNM$_STRING : 0, 272 value, &dum); 273 itmlst.nul = 0; 274 res = sys$crelnm(&attrib, &tabnam, &lognam, &acmode, &itmlst); 275 return((res == 1) ? 0 : -1); 276 } 277 278 int 279 vms_sys(char *cmd, char *out, char *inp) 280 { 281 DESC cdsc, odsc, idsc; 282 long status; 283 284 if (cmd) 285 vul_desc(&cdsc, cmd); 286 if (out) 287 vul_desc(&odsc, out); 288 if (inp) 289 vul_desc(&idsc, inp); 290 291 lib$spawn(cmd ? &cdsc : NULL, /* command string */ 292 inp ? &idsc : NULL, /* input file */ 293 out ? &odsc : NULL, /* output file */ 294 0, 0, 0, &status, 0, 0, 0, 0, 0, 0); 295 return status; 296 } 297 298 /* 299 * Convert string to lowercase - most often filename 300 */ 301 char * 302 vms_tolower( char *name ) 303 { 304 int i,nlen = strlen(name); 305 for (i = 0; i < nlen; i++) 306 name[i] = TOLOWER_ASC(name[i]); 307 return name; 308 } 309 310 /* 311 * Convert VMS system() or lib$spawn() return code to Unix-like exit value. 312 */ 313 int 314 vms_sys_status(int status) 315 { 316 if (status != SS$_NORMAL && (status & STS$M_SUCCESS) == 0) 317 return status; /* Command failed. */ 318 return 0; 319 } 320 321 /* 322 * vms_read() 323 * function for low level char input 324 * 325 * Returns: input length 326 */ 327 int 328 vms_read(char *inbuf, size_t nbytes) 329 { 330 int status, function, len; 331 TT_MODE tt_mode; 332 ITEM itmlst[2]; /* terminates on everything */ 333 static long trm_mask[8] = {-1, -1, -1, -1, -1, -1, -1, -1}; 334 335 /* whatever happened earlier we need an iochan here */ 336 if (!iochan) 337 tt_mode = get_tty(); 338 339 /* important: clean the inbuf */ 340 memset(inbuf, 0, nbytes); 341 342 /* set up the itemlist for the first read */ 343 vul_item(&itmlst[0], 0, TRM$_MODIFIERS, 344 (char *)( TRM$M_TM_NOECHO | TRM$M_TM_NOEDIT | 345 TRM$M_TM_NOFILTR | TRM$M_TM_TRMNOECHO | 346 TRM$M_TM_NORECALL) , 0); 347 vul_item(&itmlst[1], sizeof(trm_mask), TRM$_TERM, (char *)&trm_mask, 0); 348 349 /* wait forever for a char */ 350 function = (IO$_READLBLK | IO$M_EXTEND); 351 status = sys$qiow(0, iochan, function, &iosb, 0, 0, 352 inbuf, nbytes-1, 0, 0, &itmlst, sizeof(itmlst)); 353 len = strlen(inbuf); /* how many chars we got? */ 354 355 /* read immediately the rest in the IO queue */ 356 function = (IO$_READLBLK | IO$M_TIMED | IO$M_ESCAPE | IO$M_NOECHO | IO$M_NOFILTR); 357 status = sys$qiow(0, iochan, function, &iosb, 0, 0, 358 inbuf+len, nbytes-1-len, 0, 0, 0, 0); 359 360 len = strlen(inbuf); /* return the total length */ 361 362 return len; 363 } 364 365 /* 366 * vms_wproc() is called for each matching filename by decc$to_vms(). 367 * We want to save each match for later retrieval. 368 * 369 * Returns: 1 - continue finding matches 370 * 0 - stop trying to find any further matches 371 */ 372 static int 373 vms_wproc(char *name, int val) 374 { 375 int i; 376 static int vms_match_alloced = 0; 377 378 if (val == DECC$K_FOREIGN ) /* foreign non VMS files are not counting */ 379 return 1; 380 381 /* accept all DECC$K_FILE and DECC$K_DIRECTORY */ 382 if (vms_match_num == 0) { 383 /* first time through, setup some things */ 384 if (NULL == vms_fmatch) { 385 vms_fmatch = (char_u **)alloc(EXPL_ALLOC_INC * sizeof(char *)); 386 if (!vms_fmatch) 387 return 0; 388 vms_match_alloced = EXPL_ALLOC_INC; 389 vms_match_free = EXPL_ALLOC_INC; 390 } 391 else { 392 /* re-use existing space */ 393 vms_match_free = vms_match_alloced; 394 } 395 } 396 397 /* make matches look uniform */ 398 vms_remove_version(name); 399 name=vms_tolower(name); 400 401 /* if name already exists, don't add it */ 402 for (i = 0; i<vms_match_num; i++) { 403 if (0 == STRCMP((char_u *)name,vms_fmatch[i])) 404 return 1; 405 } 406 if (--vms_match_free == 0) { 407 /* add more space to store matches */ 408 vms_match_alloced += EXPL_ALLOC_INC; 409 vms_fmatch = (char_u **)vim_realloc(vms_fmatch, 410 sizeof(char **) * vms_match_alloced); 411 if (!vms_fmatch) 412 return 0; 413 vms_match_free = EXPL_ALLOC_INC; 414 } 415 vms_fmatch[vms_match_num] = vim_strsave((char_u *)name); 416 417 ++vms_match_num; 418 return 1; 419 } 420 421 /* 422 * mch_expand_wildcards this code does wild-card pattern 423 * matching NOT using the shell 424 * 425 * return OK for success, FAIL for error (you may lose some 426 * memory) and put an error message in *file. 427 * 428 * num_pat number of input patterns 429 * pat array of pointers to input patterns 430 * num_file pointer to number of matched file names 431 * file pointer to array of pointers to matched file names 432 * 433 */ 434 int 435 mch_expand_wildcards(int num_pat, char_u **pat, int *num_file, char_u ***file, int flags) 436 { 437 int i, cnt = 0; 438 char_u buf[MAXPATHL]; 439 char *result; 440 int dir; 441 int files_alloced, files_free; 442 443 *num_file = 0; /* default: no files found */ 444 files_alloced = EXPL_ALLOC_INC; 445 files_free = EXPL_ALLOC_INC; 446 *file = (char_u **) alloc(sizeof(char_u **) * files_alloced); 447 if (*file == NULL) 448 { 449 *num_file = 0; 450 return FAIL; 451 } 452 for (i = 0; i < num_pat; i++) 453 { 454 /* expand environment var or home dir */ 455 if (vim_strchr(pat[i],'$') || vim_strchr(pat[i],'~')) 456 expand_env(pat[i],buf,MAXPATHL); 457 else 458 STRCPY(buf,pat[i]); 459 460 vms_match_num = 0; /* reset collection counter */ 461 result = decc$translate_vms(vms_fixfilename(buf)); 462 if ( (int) result == 0 || (int) result == -1 ) { 463 cnt = 0; 464 } 465 else { 466 cnt = decc$to_vms(result, vms_wproc, 1 /*allow wild*/ , (flags & EW_DIR ? 0:1 ) /*allow directory*/) ; 467 } 468 if (cnt > 0) 469 cnt = vms_match_num; 470 471 if (cnt < 1) 472 continue; 473 474 for (i = 0; i < cnt; i++) 475 { 476 /* files should exist if expanding interactively */ 477 if (!(flags & EW_NOTFOUND) && mch_getperm(vms_fmatch[i]) < 0) 478 continue; 479 480 /* do not include directories */ 481 dir = (mch_isdir(vms_fmatch[i])); 482 if (( dir && !(flags & EW_DIR)) || (!dir && !(flags & EW_FILE))) 483 continue; 484 485 /* Skip files that are not executable if we check for that. */ 486 if (!dir && (flags & EW_EXEC) 487 && !mch_can_exe(vms_fmatch[i], NULL, !(flags & EW_SHELLCMD))) 488 continue; 489 490 /* allocate memory for pointers */ 491 if (--files_free < 1) 492 { 493 files_alloced += EXPL_ALLOC_INC; 494 *file = (char_u **)vim_realloc(*file, 495 sizeof(char_u **) * files_alloced); 496 if (*file == NULL) 497 { 498 *file = (char_u **)""; 499 *num_file = 0; 500 return(FAIL); 501 } 502 files_free = EXPL_ALLOC_INC; 503 } 504 505 (*file)[*num_file++] = vms_fmatch[i]; 506 } 507 } 508 return OK; 509 } 510 511 int 512 mch_expandpath(garray_T *gap, char_u *path, int flags) 513 { 514 int i,cnt = 0; 515 char *result; 516 517 vms_match_num = 0; 518 /* the result from the decc$translate_vms needs to be handled */ 519 /* otherwise it might create ACCVIO error in decc$to_vms */ 520 result = decc$translate_vms(vms_fixfilename(path)); 521 if ( (int) result == 0 || (int) result == -1 ) { 522 cnt = 0; 523 } 524 else { 525 cnt = decc$to_vms(result, vms_wproc, 1 /*allow_wild*/, (flags & EW_DIR ? 0:1 ) /*allow directory*/); 526 } 527 if (cnt > 0) 528 cnt = vms_match_num; 529 for (i = 0; i < cnt; i++) 530 { 531 if (mch_getperm(vms_fmatch[i]) >= 0) /* add existing file */ 532 addfile(gap, vms_fmatch[i], flags); 533 } 534 return cnt; 535 } 536 537 /* 538 * attempt to translate a mixed unix-vms file specification to pure vms 539 */ 540 static void 541 vms_unix_mixed_filespec(char *in, char *out) 542 { 543 char *lastcolon; 544 char *end_of_dir; 545 char ch; 546 int len; 547 char *out_str=out; 548 549 /* copy vms filename portion up to last colon 550 * (node and/or disk) 551 */ 552 lastcolon = strrchr(in, ':'); /* find last colon */ 553 if (lastcolon != NULL) { 554 len = lastcolon - in + 1; 555 strncpy(out, in, len); 556 out += len; 557 in += len; 558 } 559 560 end_of_dir = NULL; /* default: no directory */ 561 562 /* start of directory portion */ 563 ch = *in; 564 if ((ch == '[') || (ch == '/') || (ch == '<')) { /* start of directory(s) ? */ 565 ch = '['; 566 SKIP_FOLLOWING_SLASHES(in); 567 } else if (EQN(in, "../", 3)) { /* Unix parent directory? */ 568 *out++ = '['; 569 *out++ = '-'; 570 end_of_dir = out; 571 ch = '.'; 572 in += 2; 573 SKIP_FOLLOWING_SLASHES(in); 574 } else { /* not a special character */ 575 while (EQN(in, "./", 2)) { /* Ignore Unix "current dir" */ 576 in += 2; 577 SKIP_FOLLOWING_SLASHES(in); 578 } 579 if (strchr(in, '/') == NULL) { /* any more Unix directories ? */ 580 strcpy(out, in); /* No - get rest of the spec */ 581 return; 582 } else { 583 *out++ = '['; /* Yes, denote a Vms subdirectory */ 584 ch = '.'; 585 --in; 586 } 587 } 588 589 /* if we get here, there is a directory part of the filename */ 590 591 /* initialize output file spec */ 592 *out++ = ch; 593 ++in; 594 595 while (*in != '\0') { 596 ch = *in; 597 if ((ch == ']') || (ch == '/') || (ch == '>') ) { /* end of (sub)directory ? */ 598 end_of_dir = out; 599 ch = '.'; 600 SKIP_FOLLOWING_SLASHES(in); 601 } 602 else if (EQN(in, "../", 3)) { /* Unix parent directory? */ 603 *out++ = '-'; 604 end_of_dir = out; 605 ch = '.'; 606 in += 2; 607 SKIP_FOLLOWING_SLASHES(in); 608 } 609 else { 610 while (EQN(in, "./", 2)) { /* Ignore Unix "current dir" */ 611 end_of_dir = out; 612 in += 2; 613 SKIP_FOLLOWING_SLASHES(in); 614 ch = *in; 615 } 616 } 617 618 /* Place next character into output file spec */ 619 *out++ = ch; 620 ++in; 621 } 622 623 *out = '\0'; /* Terminate output file spec */ 624 625 if (end_of_dir != NULL) /* Terminate directory portion */ 626 *end_of_dir = ']'; 627 } 628 629 /* 630 * for decc$to_vms in vms_fixfilename 631 */ 632 static int 633 vms_fspec_proc(char *fil, int val) 634 { 635 strcpy(Fspec_Rms,fil); 636 return(1); 637 } 638 639 /* 640 * change unix and mixed filenames to VMS 641 */ 642 void * 643 vms_fixfilename(void *instring) 644 { 645 static char *buf = NULL; 646 static size_t buflen = 0; 647 size_t len; 648 649 /* get a big-enough buffer */ 650 len = strlen(instring) + 1; 651 if (len > buflen) 652 { 653 buflen = len + 128; 654 if (buf) 655 buf = (char *)vim_realloc(buf, buflen); 656 else 657 buf = (char *)alloc(buflen * sizeof(char)); 658 } 659 660 #ifdef DEBUG 661 char *tmpbuf = NULL; 662 tmpbuf = (char *)alloc(buflen * sizeof(char)); 663 strcpy(tmpbuf, instring); 664 #endif 665 666 Fspec_Rms = buf; /* for decc$to_vms */ 667 668 if (strchr(instring,'/') == NULL) 669 /* It is already a VMS file spec */ 670 strcpy(buf, instring); 671 else if (strchr(instring,'"') == NULL) /* password in the path? */ 672 { 673 /* Seems it is a regular file, let guess that it is pure Unix fspec */ 674 if (decc$to_vms(instring, vms_fspec_proc, 0, 0) <= 0) 675 /* No... it must be mixed */ 676 vms_unix_mixed_filespec(instring, buf); 677 } 678 else 679 /* we have a password in the path */ 680 /* decc$ functions can not handle */ 681 /* this is our only hope to resolv */ 682 vms_unix_mixed_filespec(instring, buf); 683 684 return buf; 685 } 686 687 /* 688 * Remove version number from file name 689 * we need it in some special cases as: 690 * creating swap file name and writing new file 691 */ 692 void 693 vms_remove_version(void * fname) 694 { 695 char_u *cp; 696 char_u *fp; 697 698 if ((cp = vim_strchr( fname, ';')) != NULL) /* remove version */ 699 *cp = '\0'; 700 else if ((cp = vim_strrchr( fname, '.')) != NULL ) 701 { 702 if ((fp = vim_strrchr( fname, ']')) != NULL ) {;} 703 else if ((fp = vim_strrchr( fname, '>')) != NULL ) {;} 704 else fp = fname; 705 706 while ( *fp != '\0' && fp < cp ) 707 if ( *fp++ == '.' ) 708 *cp = '\0'; 709 } 710 return ; 711 } 712 713 struct typeahead_st { 714 unsigned short numchars; 715 unsigned char firstchar; 716 unsigned char reserved0; 717 unsigned long reserved1; 718 } typeahead; 719 720 /* 721 * Wait "msec" msec until a character is available from file descriptor "fd". 722 * "msec" == 0 will check for characters once. 723 * "msec" == -1 will block until a character is available. 724 */ 725 int 726 RealWaitForChar(fd, msec, check_for_gpm) 727 int fd UNUSED; /* always read from iochan */ 728 long msec; 729 int *check_for_gpm UNUSED; 730 { 731 int status; 732 struct _generic_64 time_curr; 733 struct _generic_64 time_diff; 734 struct _generic_64 time_out; 735 unsigned int convert_operation = LIB$K_DELTA_SECONDS_F; 736 float sec =(float) msec/1000; 737 738 /* make sure the iochan is set */ 739 if (!iochan) 740 get_tty(); 741 742 if (sec > 0) { 743 /* time-out specified; convert it to absolute time */ 744 /* sec>0 requirement of lib$cvtf_to_internal_time()*/ 745 746 /* get current time (number of 100ns ticks since the VMS Epoch) */ 747 status = sys$gettim(&time_curr); 748 if (status != SS$_NORMAL) 749 return 0; /* error */ 750 /* construct the delta time */ 751 #if __G_FLOAT==0 752 # ifndef VAX 753 /* IEEE is default on IA64, but can be used on Alpha too - but not on VAX */ 754 status = lib$cvts_to_internal_time( 755 &convert_operation, &sec, &time_diff); 756 # endif 757 #else /* default on Alpha and VAX */ 758 status = lib$cvtf_to_internal_time( 759 &convert_operation, &sec, &time_diff); 760 #endif 761 if (status != LIB$_NORMAL) 762 return 0; /* error */ 763 /* add them up */ 764 status = lib$add_times( 765 &time_curr, 766 &time_diff, 767 &time_out); 768 if (status != LIB$_NORMAL) 769 return 0; /* error */ 770 } 771 772 while (TRUE) { 773 /* select() */ 774 status = sys$qiow(0, iochan, IO$_SENSEMODE | IO$M_TYPEAHDCNT, iosb, 775 0, 0, &typeahead, 8, 0, 0, 0, 0); 776 if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL) 777 return 0; /* error */ 778 779 if (typeahead.numchars) 780 return 1; /* ready to read */ 781 782 /* there's nothing to read; what now? */ 783 if (msec == 0) { 784 /* immediate time-out; return impatiently */ 785 return 0; 786 } 787 else if (msec < 0) { 788 /* no time-out; wait on indefinitely */ 789 continue; 790 } 791 else { 792 /* time-out needs to be checked */ 793 status = sys$gettim(&time_curr); 794 if (status != SS$_NORMAL) 795 return 0; /* error */ 796 797 status = lib$sub_times( 798 &time_out, 799 &time_curr, 800 &time_diff); 801 if (status != LIB$_NORMAL) 802 return 0; /* error, incl. time_diff < 0 (i.e. time-out) */ 803 804 /* otherwise wait some more */ 805 } 806 } 807 } 808