less.h revision 89022 
1/* $FreeBSD: head/contrib/less/less.h 89022 2002-01-07 20:37:09Z ps $ */
2/*
3 * Copyright (C) 1984-2000  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;
158
159#define	NULL_POSITION	((POSITION)(-1))
160
161/*
162 * Flags for open()
163 */
164#if MSDOS_COMPILER || OS2
165#define	OPEN_READ	(O_RDONLY|O_BINARY)
166#else
167#ifdef _OSK
168#define	OPEN_READ	(S_IREAD)
169#else
170#ifdef O_RDONLY
171#define	OPEN_READ	(O_RDONLY)
172#else
173#define	OPEN_READ	(0)
174#endif
175#endif
176#endif
177
178#if defined(O_WRONLY) && defined(O_APPEND)
179#define	OPEN_APPEND	(O_APPEND|O_WRONLY)
180#else
181#ifdef _OSK
182#define OPEN_APPEND	(S_IWRITE)
183#else
184#define	OPEN_APPEND	(1)
185#endif
186#endif
187
188/*
189 * Set a file descriptor to binary mode.
190 */
191#if MSDOS_COMPILER==MSOFTC
192#define	SET_BINARY(f)	_setmode(f, _O_BINARY);
193#else
194#if MSDOS_COMPILER || OS2
195#define	SET_BINARY(f)	setmode(f, O_BINARY)
196#else
197#define	SET_BINARY(f)
198#endif
199#endif
200
201/*
202 * Does the shell treat "?" as a metacharacter?
203 */
204#if MSDOS_COMPILER || OS2 || _OSK
205#define	SHELL_META_QUEST 0
206#else
207#define	SHELL_META_QUEST 1
208#endif
209
210#define	SPACES_IN_FILENAMES 1
211
212/*
213 * An IFILE represents an input file.
214 */
215#define	IFILE		VOID_POINTER
216#define	NULL_IFILE	((IFILE)NULL)
217
218/*
219 * The structure used to represent a "screen position".
220 * This consists of a file position, and a screen line number.
221 * The meaning is that the line starting at the given file
222 * position is displayed on the ln-th line of the screen.
223 * (Screen lines before ln are empty.)
224 */
225struct scrpos
226{
227	POSITION pos;
228	int ln;
229};
230
231typedef union parg
232{
233	char *p_string;
234	int p_int;
235} PARG;
236
237#define	NULL_PARG	((PARG *)NULL)
238
239struct textlist
240{
241	char *string;
242	char *endstring;
243};
244
245#define	EOI		(-1)
246
247#define	READ_INTR	(-2)
248
249/* How quiet should we be? */
250#define	NOT_QUIET	0	/* Ring bell at eof and for errors */
251#define	LITTLE_QUIET	1	/* Ring bell only for errors */
252#define	VERY_QUIET	2	/* Never ring bell */
253
254/* How should we prompt? */
255#define	PR_SHORT	0	/* Prompt with colon */
256#define	PR_MEDIUM	1	/* Prompt with message */
257#define	PR_LONG		2	/* Prompt with longer message */
258
259/* How should we handle backspaces? */
260#define	BS_SPECIAL	0	/* Do special things for underlining and bold */
261#define	BS_NORMAL	1	/* \b treated as normal char; actually output */
262#define	BS_CONTROL	2	/* \b treated as control char; prints as ^H */
263
264/* How should we search? */
265#define	SRCH_FORW	000001	/* Search forward from current position */
266#define	SRCH_BACK	000002	/* Search backward from current position */
267#define	SRCH_NO_MOVE	000004	/* Highlight, but don't move */
268#define	SRCH_FIND_ALL	000010	/* Find and highlight all matches */
269#define	SRCH_NO_MATCH	000100	/* Search for non-matching lines */
270#define	SRCH_PAST_EOF	000200	/* Search past end-of-file, into next file */
271#define	SRCH_FIRST_FILE	000400	/* Search starting at the first file */
272#define	SRCH_NO_REGEX	001000	/* Don't use regular expressions */
273
274#define	SRCH_REVERSE(t)	(((t) & SRCH_FORW) ? \
275				(((t) & ~SRCH_FORW) | SRCH_BACK) : \
276				(((t) & ~SRCH_BACK) | SRCH_FORW))
277
278/* */
279#define	NO_MCA		0
280#define	MCA_DONE	1
281#define	MCA_MORE	2
282
283#define	CC_OK		0	/* Char was accepted & processed */
284#define	CC_QUIT		1	/* Char was a request to abort current cmd */
285#define	CC_ERROR	2	/* Char could not be accepted due to error */
286#define	CC_PASS		3	/* Char was rejected (internal) */
287
288#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
289
290/* Special chars used to tell put_line() to do something special */
291#define	AT_NORMAL	(0)
292#define	AT_UNDERLINE	(1)
293#define	AT_BOLD		(2)
294#define	AT_BLINK	(3)
295#define	AT_INVIS	(4)
296#define	AT_STANDOUT	(5)
297
298#if '0' == 240
299#define IS_EBCDIC_HOST 1
300#endif
301
302#if IS_EBCDIC_HOST
303/*
304 * Long definition for EBCDIC.
305 * Since the argument is usually a constant, this macro normally compiles
306 * into a constant.
307 */
308#define CONTROL(c) ( \
309	(c)=='[' ? '\047' : \
310	(c)=='a' ? '\001' : \
311	(c)=='b' ? '\002' : \
312	(c)=='c' ? '\003' : \
313	(c)=='d' ? '\067' : \
314	(c)=='e' ? '\055' : \
315	(c)=='f' ? '\056' : \
316	(c)=='g' ? '\057' : \
317	(c)=='h' ? '\026' : \
318	(c)=='i' ? '\005' : \
319	(c)=='j' ? '\025' : \
320	(c)=='k' ? '\013' : \
321	(c)=='l' ? '\014' : \
322	(c)=='m' ? '\015' : \
323	(c)=='n' ? '\016' : \
324	(c)=='o' ? '\017' : \
325	(c)=='p' ? '\020' : \
326	(c)=='q' ? '\021' : \
327	(c)=='r' ? '\022' : \
328	(c)=='s' ? '\023' : \
329	(c)=='t' ? '\074' : \
330	(c)=='u' ? '\075' : \
331	(c)=='v' ? '\062' : \
332	(c)=='w' ? '\046' : \
333	(c)=='x' ? '\030' : \
334	(c)=='y' ? '\031' : \
335	(c)=='z' ? '\077' : \
336	(c)=='A' ? '\001' : \
337	(c)=='B' ? '\002' : \
338	(c)=='C' ? '\003' : \
339	(c)=='D' ? '\067' : \
340	(c)=='E' ? '\055' : \
341	(c)=='F' ? '\056' : \
342	(c)=='G' ? '\057' : \
343	(c)=='H' ? '\026' : \
344	(c)=='I' ? '\005' : \
345	(c)=='J' ? '\025' : \
346	(c)=='K' ? '\013' : \
347	(c)=='L' ? '\014' : \
348	(c)=='M' ? '\015' : \
349	(c)=='N' ? '\016' : \
350	(c)=='O' ? '\017' : \
351	(c)=='P' ? '\020' : \
352	(c)=='Q' ? '\021' : \
353	(c)=='R' ? '\022' : \
354	(c)=='S' ? '\023' : \
355	(c)=='T' ? '\074' : \
356	(c)=='U' ? '\075' : \
357	(c)=='V' ? '\062' : \
358	(c)=='W' ? '\046' : \
359	(c)=='X' ? '\030' : \
360	(c)=='Y' ? '\031' : \
361	(c)=='Z' ? '\077' : \
362	(c)=='|' ? '\031' : \
363	(c)=='\\' ? '\034' : \
364	(c)=='^' ? '\036' : \
365	(c)&077)
366#else
367#define	CONTROL(c)	((c)&037)
368#endif /* IS_EBCDIC_HOST */
369
370#define	ESC		CONTROL('[')
371
372#if _OSK_MWC32
373#define	LSIGNAL(sig,func)	os9_signal(sig,func)
374#else
375#define	LSIGNAL(sig,func)	signal(sig,func)
376#endif
377
378#if HAVE_SIGPROCMASK
379#if HAVE_SIGSET_T
380#else
381#undef HAVE_SIGPROCMASK
382#endif
383#endif
384#if HAVE_SIGPROCMASK
385#if HAVE_SIGEMPTYSET
386#else
387#undef  sigemptyset
388#define sigemptyset(mp) *(mp) = 0
389#endif
390#endif
391
392#define	S_INTERRUPT	01
393#define	S_STOP		02
394#define S_WINCH		04
395#define	ABORT_SIGS()	(sigs & (S_INTERRUPT|S_STOP))
396
397#define	QUIT_OK		0
398#define	QUIT_ERROR	1
399#define	QUIT_SAVED_STATUS (-1)
400
401/* filestate flags */
402#define	CH_CANSEEK	001
403#define	CH_KEEPOPEN	002
404#define	CH_POPENED	004
405#define	CH_HELPFILE	010
406
407#define	ch_zero()	((POSITION)0)
408
409#define	FAKE_HELPFILE	"@/\\less/\\help/\\file/\\@"
410
411#include "funcs.h"
412
413