Annotation of src/usr.bin/less/less.h, Revision 1.1.1.2
1.1 etheisen 1: /*
1.1.1.2 ! millert 2: * Copyright (C) 1984-2002 Mark Nudelman
1.1 etheisen 3: *
1.1.1.2 ! millert 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.
1.1 etheisen 6: *
1.1.1.2 ! millert 7: * For more information about less, or for information on how to
! 8: * contact the author, see the README file.
1.1 etheisen 9: */
10:
11:
12: /*
13: * Standard include file for "less".
14: */
15:
16: /*
1.1.1.2 ! millert 17: * Defines for MSDOS_COMPILER.
! 18: */
! 19: #define MSOFTC 1 /* Microsoft C */
! 20: #define BORLANDC 2 /* Borland C */
! 21: #define WIN32C 3 /* Windows (Borland C or Microsoft C) */
! 22: #define DJGPPC 4 /* DJGPP C */
! 23:
! 24: /*
1.1 etheisen 25: * Include the file of compile-time options.
26: * The <> make cc search for it in -I., not srcdir.
27: */
28: #include <defines.h>
29:
30: #ifdef _SEQUENT_
31: /*
32: * Kludge for Sequent Dynix systems that have sigsetmask, but
33: * it's not compatible with the way less calls it.
34: * {{ Do other systems need this? }}
35: */
36: #undef HAVE_SIGSETMASK
37: #endif
38:
39: /*
40: * Language details.
41: */
42: #if HAVE_VOID
43: #define VOID_POINTER void *
44: #else
45: #define VOID_POINTER char *
46: #define void int
47: #endif
1.1.1.2 ! millert 48: #if HAVE_CONST
! 49: #define constant const
! 50: #else
! 51: #define constant
! 52: #endif
1.1 etheisen 53:
54: #define public /* PUBLIC FUNCTION */
55:
56: /* Library function declarations */
57:
58: #if HAVE_SYS_TYPES_H
59: #include <sys/types.h>
60: #endif
61: #if HAVE_STDIO_H
62: #include <stdio.h>
63: #endif
64: #if HAVE_FCNTL_H
65: #include <fcntl.h>
66: #endif
67: #if HAVE_UNISTD_H
68: #include <unistd.h>
69: #endif
70: #if HAVE_CTYPE_H
71: #include <ctype.h>
72: #endif
1.1.1.2 ! millert 73: #if HAVE_LIMITS_H
! 74: #include <limits.h>
! 75: #endif
! 76: #if HAVE_STDLIB_H
1.1 etheisen 77: #include <stdlib.h>
1.1.1.2 ! millert 78: #endif
! 79: #if HAVE_STRING_H
1.1 etheisen 80: #include <string.h>
81: #endif
1.1.1.2 ! millert 82: #ifdef _OSK
! 83: #include <modes.h>
! 84: #include <strings.h>
! 85: #endif
! 86: #if MSDOS_COMPILER==WIN32C || OS2
! 87: #include <io.h>
! 88: #endif
! 89: #if MSDOS_COMPILER==DJGPPC
! 90: #include <io.h>
! 91: #include <sys/exceptn.h>
! 92: #include <conio.h>
! 93: #include <pc.h>
! 94: #endif
1.1 etheisen 95:
1.1.1.2 ! millert 96: #if !HAVE_STDLIB_H
1.1 etheisen 97: char *getenv();
98: off_t lseek();
99: VOID_POINTER calloc();
100: void free();
101: #endif
102:
1.1.1.2 ! millert 103: /*
! 104: * Simple lowercase test which can be used during option processing
! 105: * (before options are parsed which might tell us what charset to use).
! 106: */
! 107: #define SIMPLE_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z')
! 108: #define SIMPLE_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z')
! 109: #define SIMPLE_TO_UPPER(c) ((c) - 'a' + 'A')
! 110: #define SIMPLE_TO_LOWER(c) ((c) - 'A' + 'a')
! 111:
1.1 etheisen 112: #if !HAVE_UPPER_LOWER
1.1.1.2 ! millert 113: #define isupper(c) SIMPLE_IS_UPPER(c)
! 114: #define islower(c) SIMPLE_IS_LOWER(c)
! 115: #define toupper(c) SIMPLE_TO_UPPER(c)
! 116: #define tolower(c) SIMPLE_TO_LOWER(c)
1.1 etheisen 117: #endif
118:
119: #ifndef NULL
120: #define NULL 0
121: #endif
122:
123: #ifndef TRUE
124: #define TRUE 1
125: #endif
126: #ifndef FALSE
127: #define FALSE 0
128: #endif
129:
130: #define OPT_OFF 0
131: #define OPT_ON 1
132: #define OPT_ONPLUS 2
133:
1.1.1.2 ! millert 134: #if !HAVE_MEMCPY
1.1 etheisen 135: #ifndef memcpy
136: #define memcpy(to,from,len) bcopy((from),(to),(len))
137: #endif
138: #endif
139:
140: #define BAD_LSEEK ((off_t)-1)
141:
1.1.1.2 ! millert 142: #ifndef CHAR_BIT
! 143: #define CHAR_BIT 8
! 144: #endif
! 145:
1.1 etheisen 146: /*
1.1.1.2 ! millert 147: * Upper bound on the string length of an integer converted to string.
! 148: * 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit;
! 149: * add 1 for integer division truncation; add 1 more for a minus sign.
1.1 etheisen 150: */
1.1.1.2 ! millert 151: #define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
! 152:
1.1 etheisen 153: /*
1.1.1.2 ! millert 154: * Special types and constants.
1.1 etheisen 155: */
1.1.1.2 ! millert 156: typedef off_t POSITION;
! 157: typedef off_t LINENUM;
! 158: #define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */
1.1 etheisen 159:
160: #define NULL_POSITION ((POSITION)(-1))
161:
162: /*
163: * Flags for open()
164: */
1.1.1.2 ! millert 165: #if MSDOS_COMPILER || OS2
1.1 etheisen 166: #define OPEN_READ (O_RDONLY|O_BINARY)
167: #else
1.1.1.2 ! millert 168: #ifdef _OSK
! 169: #define OPEN_READ (S_IREAD)
! 170: #else
! 171: #ifdef O_RDONLY
! 172: #define OPEN_READ (O_RDONLY)
! 173: #else
1.1 etheisen 174: #define OPEN_READ (0)
175: #endif
1.1.1.2 ! millert 176: #endif
! 177: #endif
! 178:
! 179: #if defined(O_WRONLY) && defined(O_APPEND)
1.1 etheisen 180: #define OPEN_APPEND (O_APPEND|O_WRONLY)
181: #else
1.1.1.2 ! millert 182: #ifdef _OSK
! 183: #define OPEN_APPEND (S_IWRITE)
! 184: #else
1.1 etheisen 185: #define OPEN_APPEND (1)
186: #endif
1.1.1.2 ! millert 187: #endif
1.1 etheisen 188:
1.1.1.2 ! millert 189: /*
! 190: * Set a file descriptor to binary mode.
! 191: */
! 192: #if MSDOS_COMPILER==MSOFTC
! 193: #define SET_BINARY(f) _setmode(f, _O_BINARY);
1.1 etheisen 194: #else
1.1.1.2 ! millert 195: #if MSDOS_COMPILER || OS2
! 196: #define SET_BINARY(f) setmode(f, O_BINARY)
! 197: #else
! 198: #define SET_BINARY(f)
! 199: #endif
1.1 etheisen 200: #endif
201:
202: /*
1.1.1.2 ! millert 203: * Does the shell treat "?" as a metacharacter?
! 204: */
! 205: #if MSDOS_COMPILER || OS2 || _OSK
! 206: #define SHELL_META_QUEST 0
! 207: #else
! 208: #define SHELL_META_QUEST 1
! 209: #endif
! 210:
! 211: #define SPACES_IN_FILENAMES 1
! 212:
! 213: /*
1.1 etheisen 214: * An IFILE represents an input file.
215: */
216: #define IFILE VOID_POINTER
217: #define NULL_IFILE ((IFILE)NULL)
218:
219: /*
220: * The structure used to represent a "screen position".
221: * This consists of a file position, and a screen line number.
222: * The meaning is that the line starting at the given file
223: * position is displayed on the ln-th line of the screen.
224: * (Screen lines before ln are empty.)
225: */
226: struct scrpos
227: {
228: POSITION pos;
229: int ln;
230: };
231:
232: typedef union parg
233: {
234: char *p_string;
235: int p_int;
1.1.1.2 ! millert 236: LINENUM p_linenum;
1.1 etheisen 237: } PARG;
238:
239: #define NULL_PARG ((PARG *)NULL)
240:
241: struct textlist
242: {
243: char *string;
244: char *endstring;
245: };
246:
247: #define EOI (-1)
248:
249: #define READ_INTR (-2)
250:
251: /* How quiet should we be? */
252: #define NOT_QUIET 0 /* Ring bell at eof and for errors */
253: #define LITTLE_QUIET 1 /* Ring bell only for errors */
254: #define VERY_QUIET 2 /* Never ring bell */
255:
256: /* How should we prompt? */
257: #define PR_SHORT 0 /* Prompt with colon */
258: #define PR_MEDIUM 1 /* Prompt with message */
259: #define PR_LONG 2 /* Prompt with longer message */
260:
261: /* How should we handle backspaces? */
262: #define BS_SPECIAL 0 /* Do special things for underlining and bold */
263: #define BS_NORMAL 1 /* \b treated as normal char; actually output */
264: #define BS_CONTROL 2 /* \b treated as control char; prints as ^H */
265:
266: /* How should we search? */
1.1.1.2 ! millert 267: #define SRCH_FORW 000001 /* Search forward from current position */
! 268: #define SRCH_BACK 000002 /* Search backward from current position */
! 269: #define SRCH_NO_MOVE 000004 /* Highlight, but don't move */
! 270: #define SRCH_FIND_ALL 000010 /* Find and highlight all matches */
! 271: #define SRCH_NO_MATCH 000100 /* Search for non-matching lines */
! 272: #define SRCH_PAST_EOF 000200 /* Search past end-of-file, into next file */
! 273: #define SRCH_FIRST_FILE 000400 /* Search starting at the first file */
! 274: #define SRCH_NO_REGEX 001000 /* Don't use regular expressions */
1.1 etheisen 275:
276: #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
277: (((t) & ~SRCH_FORW) | SRCH_BACK) : \
278: (((t) & ~SRCH_BACK) | SRCH_FORW))
279:
280: /* */
281: #define NO_MCA 0
282: #define MCA_DONE 1
283: #define MCA_MORE 2
284:
285: #define CC_OK 0 /* Char was accepted & processed */
286: #define CC_QUIT 1 /* Char was a request to abort current cmd */
287: #define CC_ERROR 2 /* Char could not be accepted due to error */
288: #define CC_PASS 3 /* Char was rejected (internal) */
289:
1.1.1.2 ! millert 290: #define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */
! 291:
1.1 etheisen 292: /* Special chars used to tell put_line() to do something special */
293: #define AT_NORMAL (0)
294: #define AT_UNDERLINE (1)
295: #define AT_BOLD (2)
296: #define AT_BLINK (3)
297: #define AT_INVIS (4)
298: #define AT_STANDOUT (5)
299:
1.1.1.2 ! millert 300: #if '0' == 240
! 301: #define IS_EBCDIC_HOST 1
! 302: #endif
! 303:
! 304: #if IS_EBCDIC_HOST
! 305: /*
! 306: * Long definition for EBCDIC.
! 307: * Since the argument is usually a constant, this macro normally compiles
! 308: * into a constant.
! 309: */
! 310: #define CONTROL(c) ( \
! 311: (c)=='[' ? '\047' : \
! 312: (c)=='a' ? '\001' : \
! 313: (c)=='b' ? '\002' : \
! 314: (c)=='c' ? '\003' : \
! 315: (c)=='d' ? '\067' : \
! 316: (c)=='e' ? '\055' : \
! 317: (c)=='f' ? '\056' : \
! 318: (c)=='g' ? '\057' : \
! 319: (c)=='h' ? '\026' : \
! 320: (c)=='i' ? '\005' : \
! 321: (c)=='j' ? '\025' : \
! 322: (c)=='k' ? '\013' : \
! 323: (c)=='l' ? '\014' : \
! 324: (c)=='m' ? '\015' : \
! 325: (c)=='n' ? '\016' : \
! 326: (c)=='o' ? '\017' : \
! 327: (c)=='p' ? '\020' : \
! 328: (c)=='q' ? '\021' : \
! 329: (c)=='r' ? '\022' : \
! 330: (c)=='s' ? '\023' : \
! 331: (c)=='t' ? '\074' : \
! 332: (c)=='u' ? '\075' : \
! 333: (c)=='v' ? '\062' : \
! 334: (c)=='w' ? '\046' : \
! 335: (c)=='x' ? '\030' : \
! 336: (c)=='y' ? '\031' : \
! 337: (c)=='z' ? '\077' : \
! 338: (c)=='A' ? '\001' : \
! 339: (c)=='B' ? '\002' : \
! 340: (c)=='C' ? '\003' : \
! 341: (c)=='D' ? '\067' : \
! 342: (c)=='E' ? '\055' : \
! 343: (c)=='F' ? '\056' : \
! 344: (c)=='G' ? '\057' : \
! 345: (c)=='H' ? '\026' : \
! 346: (c)=='I' ? '\005' : \
! 347: (c)=='J' ? '\025' : \
! 348: (c)=='K' ? '\013' : \
! 349: (c)=='L' ? '\014' : \
! 350: (c)=='M' ? '\015' : \
! 351: (c)=='N' ? '\016' : \
! 352: (c)=='O' ? '\017' : \
! 353: (c)=='P' ? '\020' : \
! 354: (c)=='Q' ? '\021' : \
! 355: (c)=='R' ? '\022' : \
! 356: (c)=='S' ? '\023' : \
! 357: (c)=='T' ? '\074' : \
! 358: (c)=='U' ? '\075' : \
! 359: (c)=='V' ? '\062' : \
! 360: (c)=='W' ? '\046' : \
! 361: (c)=='X' ? '\030' : \
! 362: (c)=='Y' ? '\031' : \
! 363: (c)=='Z' ? '\077' : \
! 364: (c)=='|' ? '\031' : \
! 365: (c)=='\\' ? '\034' : \
! 366: (c)=='^' ? '\036' : \
! 367: (c)&077)
! 368: #else
1.1 etheisen 369: #define CONTROL(c) ((c)&037)
1.1.1.2 ! millert 370: #endif /* IS_EBCDIC_HOST */
! 371:
1.1 etheisen 372: #define ESC CONTROL('[')
373:
1.1.1.2 ! millert 374: #if _OSK_MWC32
! 375: #define LSIGNAL(sig,func) os9_signal(sig,func)
! 376: #else
! 377: #define LSIGNAL(sig,func) signal(sig,func)
! 378: #endif
! 379:
! 380: #if HAVE_SIGPROCMASK
! 381: #if HAVE_SIGSET_T
! 382: #else
! 383: #undef HAVE_SIGPROCMASK
! 384: #endif
! 385: #endif
! 386: #if HAVE_SIGPROCMASK
! 387: #if HAVE_SIGEMPTYSET
! 388: #else
! 389: #undef sigemptyset
! 390: #define sigemptyset(mp) *(mp) = 0
! 391: #endif
! 392: #endif
1.1 etheisen 393:
394: #define S_INTERRUPT 01
395: #define S_STOP 02
396: #define S_WINCH 04
397: #define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP))
398:
399: #define QUIT_OK 0
400: #define QUIT_ERROR 1
401: #define QUIT_SAVED_STATUS (-1)
402:
403: /* filestate flags */
404: #define CH_CANSEEK 001
405: #define CH_KEEPOPEN 002
406: #define CH_POPENED 004
1.1.1.2 ! millert 407: #define CH_HELPFILE 010
1.1 etheisen 408:
409: #define ch_zero() ((POSITION)0)
410:
1.1.1.2 ! millert 411: #define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@"
! 412:
1.1 etheisen 413: #include "funcs.h"
1.1.1.2 ! millert 414:
! 415: /* Functions not included in funcs.h */
! 416: void postoa();
! 417: void linenumtoa();
! 418: void inttoa();
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