less.h revision 63131 
1139825Simp/* $FreeBSD: head/contrib/less/less.h 63131 2000-07-14 09:57:37Z ps $ */
272376Sjake/*
372376Sjake * Copyright (C) 1984-2000  Mark Nudelman
472376Sjake *
572376Sjake * You may distribute under the terms of either the GNU General Public
672376Sjake * License or the Less License, as specified in the README file.
772376Sjake *
872376Sjake * For more information about less, or for information on how to
972376Sjake * contact the author, see the README file.
1072376Sjake */
1172376Sjake
1272376Sjake
1372376Sjake/*
1472376Sjake * Standard include file for "less".
1572376Sjake */
1672376Sjake
1772376Sjake/*
1872376Sjake * Defines for MSDOS_COMPILER.
1972376Sjake */
2072376Sjake#define	MSOFTC		1	/* Microsoft C */
2172376Sjake#define	BORLANDC	2	/* Borland C */
2272376Sjake#define	WIN32C		3	/* Windows (Borland C or Microsoft C) */
2372376Sjake#define	DJGPPC		4	/* DJGPP C */
2472376Sjake
2572376Sjake/*
2672376Sjake * Include the file of compile-time options.
2772376Sjake * The <> make cc search for it in -I., not srcdir.
2872376Sjake */
2972376Sjake#include <defines.h>
3072376Sjake
3172376Sjake#ifdef _SEQUENT_
3297261Sjake/*
3397261Sjake * Kludge for Sequent Dynix systems that have sigsetmask, but
34177435Sjeff * it's not compatible with the way less calls it.
3583366Sjulian * {{ Do other systems need this? }}
3672376Sjake */
3772376Sjake#undef HAVE_SIGSETMASK
3872376Sjake#endif
3972376Sjake
4072376Sjake/*
4172376Sjake * Language details.
4272376Sjake */
4372376Sjake#if HAVE_VOID
4472376Sjake#define	VOID_POINTER	void *
4572376Sjake#else
46177435Sjeff#define	VOID_POINTER	char *
4772376Sjake#define	void  int
4872376Sjake#endif
4972376Sjake#if HAVE_CONST
5072376Sjake#define	constant	const
5172376Sjake#else
5283045Sobrien#define	constant
5372376Sjake#endif
5472376Sjake
5572376Sjake#define	public		/* PUBLIC FUNCTION */
5672376Sjake
5772376Sjake/* Library function declarations */
5872376Sjake
5972376Sjake#if HAVE_SYS_TYPES_H
6083045Sobrien#include <sys/types.h>
6172376Sjake#endif
6272376Sjake#if HAVE_STDIO_H
6372376Sjake#include <stdio.h>
6472376Sjake#endif
65177435Sjeff#if HAVE_FCNTL_H
66177435Sjeff#include <fcntl.h>
6772376Sjake#endif
68177435Sjeff#if HAVE_UNISTD_H
69177435Sjeff#include <unistd.h>
70177435Sjeff#endif
7172376Sjake#if HAVE_CTYPE_H
72177435Sjeff#include <ctype.h>
73177435Sjeff#endif
7472376Sjake#if HAVE_STDLIB_H
7572376Sjake#include <stdlib.h>
76#endif
77#if HAVE_STRING_H
78#include <string.h>
79#endif
80#ifdef _OSK
81#include <modes.h>
82#include <strings.h>
83#endif
84#if MSDOS_COMPILER==WIN32C
85#include <io.h>
86#endif
87#if MSDOS_COMPILER==DJGPPC
88#include <io.h>
89#include <sys/exceptn.h>
90#include <conio.h>
91#include <pc.h>
92#endif
93
94#if !HAVE_STDLIB_H
95char *getenv();
96off_t lseek();
97VOID_POINTER calloc();
98void free();
99#endif
100
101/*
102 * Simple lowercase test which can be used during option processing
103 * (before options are parsed which might tell us what charset to use).
104 */
105#define SIMPLE_IS_UPPER(c)	((c) >= 'A' && (c) <= 'Z')
106#define SIMPLE_IS_LOWER(c)	((c) >= 'a' && (c) <= 'z')
107#define	SIMPLE_TO_UPPER(c)	((c) - 'a' + 'A')
108#define	SIMPLE_TO_LOWER(c)	((c) - 'A' + 'a')
109
110#if !HAVE_UPPER_LOWER
111#define	isupper(c)	SIMPLE_IS_UPPER(c)
112#define	islower(c)	SIMPLE_IS_LOWER(c)
113#define	toupper(c)	SIMPLE_TO_UPPER(c)
114#define	tolower(c)	SIMPLE_TO_LOWER(c)
115#endif
116
117#ifndef NULL
118#define	NULL	0
119#endif
120
121#ifndef TRUE
122#define	TRUE		1
123#endif
124#ifndef FALSE
125#define	FALSE		0
126#endif
127
128#define	OPT_OFF		0
129#define	OPT_ON		1
130#define	OPT_ONPLUS	2
131
132#if !HAVE_MEMCPY
133#ifndef memcpy
134#define	memcpy(to,from,len)	bcopy((from),(to),(len))
135#endif
136#endif
137
138#define	BAD_LSEEK	((off_t)-1)
139
140/*
141 * Special types and constants.
142 */
143typedef off_t		POSITION;
144#define PR_POSITION	"%lld"
145#define MAX_PRINT_POSITION 20
146#define MAX_PRINT_INT      10
147
148#define	NULL_POSITION	((POSITION)(-1))
149
150/*
151 * Flags for open()
152 */
153#if MSDOS_COMPILER || OS2
154#define	OPEN_READ	(O_RDONLY|O_BINARY)
155#else
156#ifdef _OSK
157#define	OPEN_READ	(S_IREAD)
158#else
159#ifdef O_RDONLY
160#define	OPEN_READ	(O_RDONLY)
161#else
162#define	OPEN_READ	(0)
163#endif
164#endif
165#endif
166
167#if defined(O_WRONLY) && defined(O_APPEND)
168#define	OPEN_APPEND	(O_APPEND|O_WRONLY)
169#else
170#ifdef _OSK
171#define OPEN_APPEND	(S_IWRITE)
172#else
173#define	OPEN_APPEND	(1)
174#endif
175#endif
176
177/*
178 * Set a file descriptor to binary mode.
179 */
180#if MSDOS_COMPILER==MSOFTC
181#define	SET_BINARY(f)	_setmode(f, _O_BINARY);
182#else
183#if MSDOS_COMPILER
184#define	SET_BINARY(f)	setmode(f, O_BINARY)
185#else
186#define	SET_BINARY(f)
187#endif
188#endif
189
190/*
191 * Does the shell treat "?" as a metacharacter?
192 */
193#if MSDOS_COMPILER || OS2 || _OSK
194#define	SHELL_META_QUEST 0
195#else
196#define	SHELL_META_QUEST 1
197#endif
198
199#define	SPACES_IN_FILENAMES 1
200
201/*
202 * An IFILE represents an input file.
203 */
204#define	IFILE		VOID_POINTER
205#define	NULL_IFILE	((IFILE)NULL)
206
207/*
208 * The structure used to represent a "screen position".
209 * This consists of a file position, and a screen line number.
210 * The meaning is that the line starting at the given file
211 * position is displayed on the ln-th line of the screen.
212 * (Screen lines before ln are empty.)
213 */
214struct scrpos
215{
216	POSITION pos;
217	int ln;
218};
219
220typedef union parg
221{
222	char *p_string;
223	int p_int;
224} PARG;
225
226#define	NULL_PARG	((PARG *)NULL)
227
228struct textlist
229{
230	char *string;
231	char *endstring;
232};
233
234#define	EOI		(-1)
235
236#define	READ_INTR	(-2)
237
238/* How quiet should we be? */
239#define	NOT_QUIET	0	/* Ring bell at eof and for errors */
240#define	LITTLE_QUIET	1	/* Ring bell only for errors */
241#define	VERY_QUIET	2	/* Never ring bell */
242
243/* How should we prompt? */
244#define	PR_SHORT	0	/* Prompt with colon */
245#define	PR_MEDIUM	1	/* Prompt with message */
246#define	PR_LONG		2	/* Prompt with longer message */
247
248/* How should we handle backspaces? */
249#define	BS_SPECIAL	0	/* Do special things for underlining and bold */
250#define	BS_NORMAL	1	/* \b treated as normal char; actually output */
251#define	BS_CONTROL	2	/* \b treated as control char; prints as ^H */
252
253/* How should we search? */
254#define	SRCH_FORW	000001	/* Search forward from current position */
255#define	SRCH_BACK	000002	/* Search backward from current position */
256#define	SRCH_NO_MOVE	000004	/* Highlight, but don't move */
257#define	SRCH_FIND_ALL	000010	/* Find and highlight all matches */
258#define	SRCH_NO_MATCH	000100	/* Search for non-matching lines */
259#define	SRCH_PAST_EOF	000200	/* Search past end-of-file, into next file */
260#define	SRCH_FIRST_FILE	000400	/* Search starting at the first file */
261#define	SRCH_NO_REGEX	001000	/* Don't use regular expressions */
262
263#define	SRCH_REVERSE(t)	(((t) & SRCH_FORW) ? \
264				(((t) & ~SRCH_FORW) | SRCH_BACK) : \
265				(((t) & ~SRCH_BACK) | SRCH_FORW))
266
267/* */
268#define	NO_MCA		0
269#define	MCA_DONE	1
270#define	MCA_MORE	2
271
272#define	CC_OK		0	/* Char was accepted & processed */
273#define	CC_QUIT		1	/* Char was a request to abort current cmd */
274#define	CC_ERROR	2	/* Char could not be accepted due to error */
275#define	CC_PASS		3	/* Char was rejected (internal) */
276
277#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
278
279/* Special chars used to tell put_line() to do something special */
280#define	AT_NORMAL	(0)
281#define	AT_UNDERLINE	(1)
282#define	AT_BOLD		(2)
283#define	AT_BLINK	(3)
284#define	AT_INVIS	(4)
285#define	AT_STANDOUT	(5)
286
287#if IS_EBCDIC_HOST
288/*
289 * Long definition for EBCDIC.
290 * Since the argument is usually a constant, this macro normally compiles
291 * into a constant.
292 */
293#define CONTROL(c) ( \
294	(c)=='[' ? '\047' : \
295	(c)=='a' ? '\001' : \
296	(c)=='b' ? '\002' : \
297	(c)=='c' ? '\003' : \
298	(c)=='d' ? '\067' : \
299	(c)=='e' ? '\055' : \
300	(c)=='f' ? '\056' : \
301	(c)=='g' ? '\057' : \
302	(c)=='h' ? '\026' : \
303	(c)=='i' ? '\005' : \
304	(c)=='j' ? '\025' : \
305	(c)=='k' ? '\013' : \
306	(c)=='l' ? '\014' : \
307	(c)=='m' ? '\015' : \
308	(c)=='n' ? '\016' : \
309	(c)=='o' ? '\017' : \
310	(c)=='p' ? '\020' : \
311	(c)=='q' ? '\021' : \
312	(c)=='r' ? '\022' : \
313	(c)=='s' ? '\023' : \
314	(c)=='t' ? '\074' : \
315	(c)=='u' ? '\075' : \
316	(c)=='v' ? '\062' : \
317	(c)=='w' ? '\046' : \
318	(c)=='x' ? '\030' : \
319	(c)=='y' ? '\031' : \
320	(c)=='z' ? '\077' : \
321	(c)=='A' ? '\001' : \
322	(c)=='B' ? '\002' : \
323	(c)=='C' ? '\003' : \
324	(c)=='D' ? '\067' : \
325	(c)=='E' ? '\055' : \
326	(c)=='F' ? '\056' : \
327	(c)=='G' ? '\057' : \
328	(c)=='H' ? '\026' : \
329	(c)=='I' ? '\005' : \
330	(c)=='J' ? '\025' : \
331	(c)=='K' ? '\013' : \
332	(c)=='L' ? '\014' : \
333	(c)=='M' ? '\015' : \
334	(c)=='N' ? '\016' : \
335	(c)=='O' ? '\017' : \
336	(c)=='P' ? '\020' : \
337	(c)=='Q' ? '\021' : \
338	(c)=='R' ? '\022' : \
339	(c)=='S' ? '\023' : \
340	(c)=='T' ? '\074' : \
341	(c)=='U' ? '\075' : \
342	(c)=='V' ? '\062' : \
343	(c)=='W' ? '\046' : \
344	(c)=='X' ? '\030' : \
345	(c)=='Y' ? '\031' : \
346	(c)=='Z' ? '\077' : \
347	(c)=='|' ? '\031' : \
348	(c)=='\\' ? '\034' : \
349	(c)=='^' ? '\036' : \
350	(c)&077)
351#else
352#define	CONTROL(c)	((c)&037)
353#endif /* IS_EBCDIC_HOST */
354
355#define	ESC		CONTROL('[')
356
357#if _OSK_MWC32
358#define	LSIGNAL(sig,func)	os9_signal(sig,func)
359#else
360#define	LSIGNAL(sig,func)	signal(sig,func)
361#endif
362
363#if HAVE_SIGPROCMASK
364#if HAVE_SIGSET_T
365#else
366#undef HAVE_SIGPROCMASK
367#endif
368#endif
369#if HAVE_SIGPROCMASK
370#if HAVE_SIGEMPTYSET
371#else
372#undef  sigemptyset
373#define sigemptyset(mp) *(mp) = 0
374#endif
375#endif
376
377#define	S_INTERRUPT	01
378#define	S_STOP		02
379#define S_WINCH		04
380#define	ABORT_SIGS()	(sigs & (S_INTERRUPT|S_STOP))
381
382#define	QUIT_OK		0
383#define	QUIT_ERROR	1
384#define	QUIT_SAVED_STATUS (-1)
385
386/* filestate flags */
387#define	CH_CANSEEK	001
388#define	CH_KEEPOPEN	002
389#define	CH_POPENED	004
390#define	CH_HELPFILE	010
391
392#define	ch_zero()	((POSITION)0)
393
394#define	FAKE_HELPFILE	"@/\\less/\\help/\\file/\\@"
395
396#include "funcs.h"
397
398