less.h revision 128348 
1/* $FreeBSD: head/contrib/less/less.h 128348 2004-04-17 07:24:09Z tjr $ */
2/*
3 * Copyright (C) 1984-2002  Mark Nudelman
4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Less License, as specified in the README file.
7 *
8 * For more information about less, or for information on how to
9 * contact the author, see the README file.
10 */
11
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_LIMITS_H
75#include <limits.h>
76#endif
77#if HAVE_STDLIB_H
78#include <stdlib.h>
79#endif
80#if HAVE_STRING_H
81#include <string.h>
82#endif
83#ifdef _OSK
84#include <modes.h>
85#include <strings.h>
86#endif
87#if MSDOS_COMPILER==WIN32C || OS2
88#include <io.h>
89#endif
90#if MSDOS_COMPILER==DJGPPC
91#include <io.h>
92#include <sys/exceptn.h>
93#include <conio.h>
94#include <pc.h>
95#endif
96
97#if !HAVE_STDLIB_H
98char *getenv();
99off_t lseek();
100VOID_POINTER calloc();
101void free();
102#endif
103
104/*
105 * Simple lowercase test which can be used during option processing
106 * (before options are parsed which might tell us what charset to use).
107 */
108#define SIMPLE_IS_UPPER(c)	((c) >= 'A' && (c) <= 'Z')
109#define SIMPLE_IS_LOWER(c)	((c) >= 'a' && (c) <= 'z')
110#define	SIMPLE_TO_UPPER(c)	((c) - 'a' + 'A')
111#define	SIMPLE_TO_LOWER(c)	((c) - 'A' + 'a')
112
113#if !HAVE_UPPER_LOWER
114#define	isupper(c)	SIMPLE_IS_UPPER(c)
115#define	islower(c)	SIMPLE_IS_LOWER(c)
116#define	toupper(c)	SIMPLE_TO_UPPER(c)
117#define	tolower(c)	SIMPLE_TO_LOWER(c)
118#endif
119
120#ifndef NULL
121#define	NULL	0
122#endif
123
124#ifndef TRUE
125#define	TRUE		1
126#endif
127#ifndef FALSE
128#define	FALSE		0
129#endif
130
131#define	OPT_OFF		0
132#define	OPT_ON		1
133#define	OPT_ONPLUS	2
134
135#if !HAVE_MEMCPY
136#ifndef memcpy
137#define	memcpy(to,from,len)	bcopy((from),(to),(len))
138#endif
139#endif
140
141#define	BAD_LSEEK	((off_t)-1)
142
143#ifndef CHAR_BIT
144#define CHAR_BIT 8
145#endif
146
147/*
148 * Upper bound on the string length of an integer converted to string.
149 * 302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
150 * add 1 for integer division truncation; add 1 more for a minus sign.
151 */
152#define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
153
154/*
155 * Special types and constants.
156 */
157typedef off_t		POSITION;
158typedef off_t		LINENUM;
159#define MIN_LINENUM_WIDTH  7	/* Min printing width of a line number */
160
161#define	NULL_POSITION	((POSITION)(-1))
162
163/*
164 * Flags for open()
165 */
166#if MSDOS_COMPILER || OS2
167#define	OPEN_READ	(O_RDONLY|O_BINARY)
168#else
169#ifdef _OSK
170#define	OPEN_READ	(S_IREAD)
171#else
172#ifdef O_RDONLY
173#define	OPEN_READ	(O_RDONLY)
174#else
175#define	OPEN_READ	(0)
176#endif
177#endif
178#endif
179
180#if defined(O_WRONLY) && defined(O_APPEND)
181#define	OPEN_APPEND	(O_APPEND|O_WRONLY)
182#else
183#ifdef _OSK
184#define OPEN_APPEND	(S_IWRITE)
185#else
186#define	OPEN_APPEND	(1)
187#endif
188#endif
189
190/*
191 * Set a file descriptor to binary mode.
192 */
193#if MSDOS_COMPILER==MSOFTC
194#define	SET_BINARY(f)	_setmode(f, _O_BINARY);
195#else
196#if MSDOS_COMPILER || OS2
197#define	SET_BINARY(f)	setmode(f, O_BINARY)
198#else
199#define	SET_BINARY(f)
200#endif
201#endif
202
203/*
204 * Does the shell treat "?" as a metacharacter?
205 */
206#if MSDOS_COMPILER || OS2 || _OSK
207#define	SHELL_META_QUEST 0
208#else
209#define	SHELL_META_QUEST 1
210#endif
211
212#define	SPACES_IN_FILENAMES 1
213
214/*
215 * An IFILE represents an input file.
216 */
217#define	IFILE		VOID_POINTER
218#define	NULL_IFILE	((IFILE)NULL)
219
220/*
221 * The structure used to represent a "screen position".
222 * This consists of a file position, and a screen line number.
223 * The meaning is that the line starting at the given file
224 * position is displayed on the ln-th line of the screen.
225 * (Screen lines before ln are empty.)
226 */
227struct scrpos
228{
229	POSITION pos;
230	int ln;
231};
232
233typedef union parg
234{
235	char *p_string;
236	int p_int;
237	LINENUM p_linenum;
238} PARG;
239
240#define	NULL_PARG	((PARG *)NULL)
241
242struct textlist
243{
244	char *string;
245	char *endstring;
246};
247
248#define	EOI		(-1)
249
250#define	READ_INTR	(-2)
251
252/* How quiet should we be? */
253#define	NOT_QUIET	0	/* Ring bell at eof and for errors */
254#define	LITTLE_QUIET	1	/* Ring bell only for errors */
255#define	VERY_QUIET	2	/* Never ring bell */
256
257/* How should we prompt? */
258#define	PR_SHORT	0	/* Prompt with colon */
259#define	PR_MEDIUM	1	/* Prompt with message */
260#define	PR_LONG		2	/* Prompt with longer message */
261
262/* How should we handle backspaces? */
263#define	BS_SPECIAL	0	/* Do special things for underlining and bold */
264#define	BS_NORMAL	1	/* \b treated as normal char; actually output */
265#define	BS_CONTROL	2	/* \b treated as control char; prints as ^H */
266
267/* How should we search? */
268#define	SRCH_FORW	000001	/* Search forward from current position */
269#define	SRCH_BACK	000002	/* Search backward from current position */
270#define	SRCH_NO_MOVE	000004	/* Highlight, but don't move */
271#define	SRCH_FIND_ALL	000010	/* Find and highlight all matches */
272#define	SRCH_NO_MATCH	000100	/* Search for non-matching lines */
273#define	SRCH_PAST_EOF	000200	/* Search past end-of-file, into next file */
274#define	SRCH_FIRST_FILE	000400	/* Search starting at the first file */
275#define	SRCH_NO_REGEX	001000	/* Don't use regular expressions */
276
277#define	SRCH_REVERSE(t)	(((t) & SRCH_FORW) ? \
278				(((t) & ~SRCH_FORW) | SRCH_BACK) : \
279				(((t) & ~SRCH_BACK) | SRCH_FORW))
280
281/* */
282#define	NO_MCA		0
283#define	MCA_DONE	1
284#define	MCA_MORE	2
285
286#define	CC_OK		0	/* Char was accepted & processed */
287#define	CC_QUIT		1	/* Char was a request to abort current cmd */
288#define	CC_ERROR	2	/* Char could not be accepted due to error */
289#define	CC_PASS		3	/* Char was rejected (internal) */
290
291#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
292
293/* Special chars used to tell put_line() to do something special */
294#define	AT_NORMAL	(0)
295#define	AT_UNDERLINE	(1)
296#define	AT_BOLD		(2)
297#define	AT_BLINK	(3)
298#define	AT_INVIS	(4)
299#define	AT_STANDOUT	(5)
300
301#if '0' == 240
302#define IS_EBCDIC_HOST 1
303#endif
304
305#if IS_EBCDIC_HOST
306/*
307 * Long definition for EBCDIC.
308 * Since the argument is usually a constant, this macro normally compiles
309 * into a constant.
310 */
311#define CONTROL(c) ( \
312	(c)=='[' ? '\047' : \
313	(c)=='a' ? '\001' : \
314	(c)=='b' ? '\002' : \
315	(c)=='c' ? '\003' : \
316	(c)=='d' ? '\067' : \
317	(c)=='e' ? '\055' : \
318	(c)=='f' ? '\056' : \
319	(c)=='g' ? '\057' : \
320	(c)=='h' ? '\026' : \
321	(c)=='i' ? '\005' : \
322	(c)=='j' ? '\025' : \
323	(c)=='k' ? '\013' : \
324	(c)=='l' ? '\014' : \
325	(c)=='m' ? '\015' : \
326	(c)=='n' ? '\016' : \
327	(c)=='o' ? '\017' : \
328	(c)=='p' ? '\020' : \
329	(c)=='q' ? '\021' : \
330	(c)=='r' ? '\022' : \
331	(c)=='s' ? '\023' : \
332	(c)=='t' ? '\074' : \
333	(c)=='u' ? '\075' : \
334	(c)=='v' ? '\062' : \
335	(c)=='w' ? '\046' : \
336	(c)=='x' ? '\030' : \
337	(c)=='y' ? '\031' : \
338	(c)=='z' ? '\077' : \
339	(c)=='A' ? '\001' : \
340	(c)=='B' ? '\002' : \
341	(c)=='C' ? '\003' : \
342	(c)=='D' ? '\067' : \
343	(c)=='E' ? '\055' : \
344	(c)=='F' ? '\056' : \
345	(c)=='G' ? '\057' : \
346	(c)=='H' ? '\026' : \
347	(c)=='I' ? '\005' : \
348	(c)=='J' ? '\025' : \
349	(c)=='K' ? '\013' : \
350	(c)=='L' ? '\014' : \
351	(c)=='M' ? '\015' : \
352	(c)=='N' ? '\016' : \
353	(c)=='O' ? '\017' : \
354	(c)=='P' ? '\020' : \
355	(c)=='Q' ? '\021' : \
356	(c)=='R' ? '\022' : \
357	(c)=='S' ? '\023' : \
358	(c)=='T' ? '\074' : \
359	(c)=='U' ? '\075' : \
360	(c)=='V' ? '\062' : \
361	(c)=='W' ? '\046' : \
362	(c)=='X' ? '\030' : \
363	(c)=='Y' ? '\031' : \
364	(c)=='Z' ? '\077' : \
365	(c)=='|' ? '\031' : \
366	(c)=='\\' ? '\034' : \
367	(c)=='^' ? '\036' : \
368	(c)&077)
369#else
370#define	CONTROL(c)	((c)&037)
371#endif /* IS_EBCDIC_HOST */
372
373#define	ESC		CONTROL('[')
374
375#if _OSK_MWC32
376#define	LSIGNAL(sig,func)	os9_signal(sig,func)
377#else
378#define	LSIGNAL(sig,func)	signal(sig,func)
379#endif
380
381#if HAVE_SIGPROCMASK
382#if HAVE_SIGSET_T
383#else
384#undef HAVE_SIGPROCMASK
385#endif
386#endif
387#if HAVE_SIGPROCMASK
388#if HAVE_SIGEMPTYSET
389#else
390#undef  sigemptyset
391#define sigemptyset(mp) *(mp) = 0
392#endif
393#endif
394
395#define	S_INTERRUPT	01
396#define	S_STOP		02
397#define S_WINCH		04
398#define	ABORT_SIGS()	(sigs & (S_INTERRUPT|S_STOP))
399
400#define	QUIT_OK		0
401#define	QUIT_ERROR	1
402#define	QUIT_SAVED_STATUS (-1)
403
404/* filestate flags */
405#define	CH_CANSEEK	001
406#define	CH_KEEPOPEN	002
407#define	CH_POPENED	004
408#define	CH_HELPFILE	010
409
410#define	ch_zero()	((POSITION)0)
411
412#define	FAKE_HELPFILE	"@/\\less/\\help/\\file/\\@"
413
414#include "funcs.h"
415
416/* Functions not included in funcs.h */
417void postoa();
418void linenumtoa();
419void inttoa();
420