1 /* 2 * Copyright (C) 1984-2008 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information about less, or for information on how to 8 * contact the author, see the README file. 9 */ 10 11 #define NEWBOT 1 12 13 /* 14 * Standard include file for "less". 15 */ 16 17 /* 18 * Defines for MSDOS_COMPILER. 19 */ 20 #define MSOFTC 1 /* Microsoft C */ 21 #define BORLANDC 2 /* Borland C */ 22 #define WIN32C 3 /* Windows (Borland C or Microsoft C) */ 23 #define DJGPPC 4 /* DJGPP C */ 24 25 /* 26 * Include the file of compile-time options. 27 * The <> make cc search for it in -I., not srcdir. 28 */ 29 #include <defines.h> 30 31 #ifdef _SEQUENT_ 32 /* 33 * Kludge for Sequent Dynix systems that have sigsetmask, but 34 * it's not compatible with the way less calls it. 35 * {{ Do other systems need this? }} 36 */ 37 #undef HAVE_SIGSETMASK 38 #endif 39 40 /* 41 * Language details. 42 */ 43 #if HAVE_VOID 44 #define VOID_POINTER void * 45 #else 46 #define VOID_POINTER char * 47 #define void int 48 #endif 49 #if HAVE_CONST 50 #define constant const 51 #else 52 #define constant 53 #endif 54 55 #define public /* PUBLIC FUNCTION */ 56 57 /* Library function declarations */ 58 59 #if HAVE_SYS_TYPES_H 60 #include <sys/types.h> 61 #endif 62 #if HAVE_STDIO_H 63 #include <stdio.h> 64 #endif 65 #if HAVE_FCNTL_H 66 #include <fcntl.h> 67 #endif 68 #if HAVE_UNISTD_H 69 #include <unistd.h> 70 #endif 71 #if HAVE_CTYPE_H 72 #include <ctype.h> 73 #endif 74 #if HAVE_WCTYPE_H 75 #include <wctype.h> 76 #endif 77 #if HAVE_LIMITS_H 78 #include <limits.h> 79 #endif 80 #if HAVE_STDLIB_H 81 #include <stdlib.h> 82 #endif 83 #if HAVE_STRING_H 84 #include <string.h> 85 #endif 86 87 /* OS-specific includes */ 88 #ifdef _OSK 89 #include <modes.h> 90 #include <strings.h> 91 #endif 92 93 #ifdef __TANDEM 94 #include <floss.h> 95 #endif 96 97 #if MSDOS_COMPILER==WIN32C || OS2 98 #include <io.h> 99 #endif 100 101 #if MSDOS_COMPILER==DJGPPC 102 #include <io.h> 103 #include <sys/exceptn.h> 104 #include <conio.h> 105 #include <pc.h> 106 #endif 107 108 #if !HAVE_STDLIB_H 109 char *getenv(); 110 off_t lseek(); 111 VOID_POINTER calloc(); 112 void free(); 113 #endif 114 115 /* 116 * Simple lowercase test which can be used during option processing 117 * (before options are parsed which might tell us what charset to use). 118 */ 119 #define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z') 120 #define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z') 121 #define ASCII_TO_UPPER(c) ((c) - 'a' + 'A') 122 #define ASCII_TO_LOWER(c) ((c) - 'A' + 'a') 123 124 #undef IS_UPPER 125 #undef IS_LOWER 126 #undef TO_UPPER 127 #undef TO_LOWER 128 #undef IS_SPACE 129 #undef IS_DIGIT 130 131 #if HAVE_WCTYPE 132 #define IS_UPPER(c) iswupper(c) 133 #define IS_LOWER(c) iswlower(c) 134 #define TO_UPPER(c) towupper(c) 135 #define TO_LOWER(c) towlower(c) 136 #else 137 #if HAVE_UPPER_LOWER 138 #define IS_UPPER(c) isupper((unsigned char) (c)) 139 #define IS_LOWER(c) islower((unsigned char) (c)) 140 #define TO_UPPER(c) toupper((unsigned char) (c)) 141 #define TO_LOWER(c) tolower((unsigned char) (c)) 142 #else 143 #define IS_UPPER(c) ASCII_IS_UPPER(c) 144 #define IS_LOWER(c) ASCII_IS_LOWER(c) 145 #define TO_UPPER(c) ASCII_TO_UPPER(c) 146 #define TO_LOWER(c) ASCII_TO_LOWER(c) 147 #endif 148 #endif 149 150 #ifdef isspace 151 #define IS_SPACE(c) isspace((unsigned char)(c)) 152 #else 153 #define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f') 154 #endif 155 156 #ifdef isdigit 157 #define IS_DIGIT(c) isdigit((unsigned char)(c)) 158 #else 159 #define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') 160 #endif 161 162 #define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI)) 163 164 #ifndef NULL 165 #define NULL 0 166 #endif 167 168 #ifndef TRUE 169 #define TRUE 1 170 #endif 171 #ifndef FALSE 172 #define FALSE 0 173 #endif 174 175 #define OPT_OFF 0 176 #define OPT_ON 1 177 #define OPT_ONPLUS 2 178 179 #if !HAVE_MEMCPY 180 #ifndef memcpy 181 #define memcpy(to,from,len) bcopy((from),(to),(len)) 182 #endif 183 #endif 184 185 #if HAVE_SNPRINTF 186 #define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1)) 187 #define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2)) 188 #define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3)) 189 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4)) 190 #else 191 /* Use unsafe sprintf if we don't have snprintf. */ 192 #define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1)) 193 #define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2)) 194 #define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3)) 195 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4)) 196 #endif 197 198 #define BAD_LSEEK ((off_t)-1) 199 200 #ifndef SEEK_SET 201 #define SEEK_SET 0 202 #endif 203 #ifndef SEEK_END 204 #define SEEK_END 2 205 #endif 206 207 #ifndef CHAR_BIT 208 #define CHAR_BIT 8 209 #endif 210 211 /* 212 * Upper bound on the string length of an integer converted to string. 213 * 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit; 214 * add 1 for integer division truncation; add 1 more for a minus sign. 215 */ 216 #define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1) 217 218 /* 219 * Special types and constants. 220 */ 221 typedef unsigned long LWCHAR; 222 typedef off_t POSITION; 223 typedef off_t LINENUM; 224 #define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */ 225 #define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */ 226 227 #define NULL_POSITION ((POSITION)(-1)) 228 229 /* 230 * Flags for open() 231 */ 232 #if MSDOS_COMPILER || OS2 233 #define OPEN_READ (O_RDONLY|O_BINARY) 234 #else 235 #ifdef _OSK 236 #define OPEN_READ (S_IREAD) 237 #else 238 #ifdef O_RDONLY 239 #define OPEN_READ (O_RDONLY) 240 #else 241 #define OPEN_READ (0) 242 #endif 243 #endif 244 #endif 245 246 #if defined(O_WRONLY) && defined(O_APPEND) 247 #define OPEN_APPEND (O_APPEND|O_WRONLY) 248 #else 249 #ifdef _OSK 250 #define OPEN_APPEND (S_IWRITE) 251 #else 252 #define OPEN_APPEND (1) 253 #endif 254 #endif 255 256 /* 257 * Set a file descriptor to binary mode. 258 */ 259 #if MSDOS_COMPILER==MSOFTC 260 #define SET_BINARY(f) _setmode(f, _O_BINARY); 261 #else 262 #if MSDOS_COMPILER || OS2 263 #define SET_BINARY(f) setmode(f, O_BINARY) 264 #else 265 #define SET_BINARY(f) 266 #endif 267 #endif 268 269 /* 270 * Does the shell treat "?" as a metacharacter? 271 */ 272 #if MSDOS_COMPILER || OS2 || _OSK 273 #define SHELL_META_QUEST 0 274 #else 275 #define SHELL_META_QUEST 1 276 #endif 277 278 #define SPACES_IN_FILENAMES 1 279 280 /* 281 * An IFILE represents an input file. 282 */ 283 #define IFILE VOID_POINTER 284 #define NULL_IFILE ((IFILE)NULL) 285 286 /* 287 * The structure used to represent a "screen position". 288 * This consists of a file position, and a screen line number. 289 * The meaning is that the line starting at the given file 290 * position is displayed on the ln-th line of the screen. 291 * (Screen lines before ln are empty.) 292 */ 293 struct scrpos 294 { 295 POSITION pos; 296 int ln; 297 }; 298 299 typedef union parg 300 { 301 char *p_string; 302 int p_int; 303 LINENUM p_linenum; 304 } PARG; 305 306 #define NULL_PARG ((PARG *)NULL) 307 308 struct textlist 309 { 310 char *string; 311 char *endstring; 312 }; 313 314 #define EOI (-1) 315 316 #define READ_INTR (-2) 317 318 /* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */ 319 #define NUM_FRAC_DENOM 1000000 320 #define NUM_LOG_FRAC_DENOM 6 321 322 /* How quiet should we be? */ 323 #define NOT_QUIET 0 /* Ring bell at eof and for errors */ 324 #define LITTLE_QUIET 1 /* Ring bell only for errors */ 325 #define VERY_QUIET 2 /* Never ring bell */ 326 327 /* How should we prompt? */ 328 #define PR_SHORT 0 /* Prompt with colon */ 329 #define PR_MEDIUM 1 /* Prompt with message */ 330 #define PR_LONG 2 /* Prompt with longer message */ 331 332 /* How should we handle backspaces? */ 333 #define BS_SPECIAL 0 /* Do special things for underlining and bold */ 334 #define BS_NORMAL 1 /* \b treated as normal char; actually output */ 335 #define BS_CONTROL 2 /* \b treated as control char; prints as ^H */ 336 337 /* How should we search? */ 338 #define SRCH_FORW (1 << 0) /* Search forward from current position */ 339 #define SRCH_BACK (1 << 1) /* Search backward from current position */ 340 #define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */ 341 #define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */ 342 #define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */ 343 #define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */ 344 #define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */ 345 #define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */ 346 #define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */ 347 348 #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \ 349 (((t) & ~SRCH_FORW) | SRCH_BACK) : \ 350 (((t) & ~SRCH_BACK) | SRCH_FORW)) 351 352 /* */ 353 #define NO_MCA 0 354 #define MCA_DONE 1 355 #define MCA_MORE 2 356 357 #define CC_OK 0 /* Char was accepted & processed */ 358 #define CC_QUIT 1 /* Char was a request to abort current cmd */ 359 #define CC_ERROR 2 /* Char could not be accepted due to error */ 360 #define CC_PASS 3 /* Char was rejected (internal) */ 361 362 #define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */ 363 364 /* Special char bit-flags used to tell put_line() to do something special */ 365 #define AT_NORMAL (0) 366 #define AT_UNDERLINE (1 << 0) 367 #define AT_BOLD (1 << 1) 368 #define AT_BLINK (1 << 2) 369 #define AT_STANDOUT (1 << 3) 370 #define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */ 371 #define AT_BINARY (1 << 5) /* LESS*BINFMT representation */ 372 #define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */ 373 374 #if '0' == 240 375 #define IS_EBCDIC_HOST 1 376 #endif 377 378 #if IS_EBCDIC_HOST 379 /* 380 * Long definition for EBCDIC. 381 * Since the argument is usually a constant, this macro normally compiles 382 * into a constant. 383 */ 384 #define CONTROL(c) ( \ 385 (c)=='[' ? '\047' : \ 386 (c)=='a' ? '\001' : \ 387 (c)=='b' ? '\002' : \ 388 (c)=='c' ? '\003' : \ 389 (c)=='d' ? '\067' : \ 390 (c)=='e' ? '\055' : \ 391 (c)=='f' ? '\056' : \ 392 (c)=='g' ? '\057' : \ 393 (c)=='h' ? '\026' : \ 394 (c)=='i' ? '\005' : \ 395 (c)=='j' ? '\025' : \ 396 (c)=='k' ? '\013' : \ 397 (c)=='l' ? '\014' : \ 398 (c)=='m' ? '\015' : \ 399 (c)=='n' ? '\016' : \ 400 (c)=='o' ? '\017' : \ 401 (c)=='p' ? '\020' : \ 402 (c)=='q' ? '\021' : \ 403 (c)=='r' ? '\022' : \ 404 (c)=='s' ? '\023' : \ 405 (c)=='t' ? '\074' : \ 406 (c)=='u' ? '\075' : \ 407 (c)=='v' ? '\062' : \ 408 (c)=='w' ? '\046' : \ 409 (c)=='x' ? '\030' : \ 410 (c)=='y' ? '\031' : \ 411 (c)=='z' ? '\077' : \ 412 (c)=='A' ? '\001' : \ 413 (c)=='B' ? '\002' : \ 414 (c)=='C' ? '\003' : \ 415 (c)=='D' ? '\067' : \ 416 (c)=='E' ? '\055' : \ 417 (c)=='F' ? '\056' : \ 418 (c)=='G' ? '\057' : \ 419 (c)=='H' ? '\026' : \ 420 (c)=='I' ? '\005' : \ 421 (c)=='J' ? '\025' : \ 422 (c)=='K' ? '\013' : \ 423 (c)=='L' ? '\014' : \ 424 (c)=='M' ? '\015' : \ 425 (c)=='N' ? '\016' : \ 426 (c)=='O' ? '\017' : \ 427 (c)=='P' ? '\020' : \ 428 (c)=='Q' ? '\021' : \ 429 (c)=='R' ? '\022' : \ 430 (c)=='S' ? '\023' : \ 431 (c)=='T' ? '\074' : \ 432 (c)=='U' ? '\075' : \ 433 (c)=='V' ? '\062' : \ 434 (c)=='W' ? '\046' : \ 435 (c)=='X' ? '\030' : \ 436 (c)=='Y' ? '\031' : \ 437 (c)=='Z' ? '\077' : \ 438 (c)=='|' ? '\031' : \ 439 (c)=='\\' ? '\034' : \ 440 (c)=='^' ? '\036' : \ 441 (c)&077) 442 #else 443 #define CONTROL(c) ((c)&037) 444 #endif /* IS_EBCDIC_HOST */ 445 446 #define ESC CONTROL('[') 447 #define CSI ((unsigned char)'\233') 448 449 #if _OSK_MWC32 450 #define LSIGNAL(sig,func) os9_signal(sig,func) 451 #else 452 #define LSIGNAL(sig,func) signal(sig,func) 453 #endif 454 455 #if HAVE_SIGPROCMASK 456 #if HAVE_SIGSET_T 457 #else 458 #undef HAVE_SIGPROCMASK 459 #endif 460 #endif 461 #if HAVE_SIGPROCMASK 462 #if HAVE_SIGEMPTYSET 463 #else 464 #undef sigemptyset 465 #define sigemptyset(mp) *(mp) = 0 466 #endif 467 #endif 468 469 #define S_INTERRUPT 01 470 #define S_STOP 02 471 #define S_WINCH 04 472 #define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP)) 473 474 #define QUIT_OK 0 475 #define QUIT_ERROR 1 476 #define QUIT_SAVED_STATUS (-1) 477 478 #define FOLLOW_DESC 0 479 #define FOLLOW_NAME 1 480 481 /* filestate flags */ 482 #define CH_CANSEEK 001 483 #define CH_KEEPOPEN 002 484 #define CH_POPENED 004 485 #define CH_HELPFILE 010 486 487 #define ch_zero() ((POSITION)0) 488 489 #define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@" 490 491 #include "funcs.h" 492 493 /* Functions not included in funcs.h */ 494 void postoa(); 495 void linenumtoa(); 496 void inttoa(); 497