less.h revision 60786 
1/*
2 * Copyright (C) 1984-2000  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
12/*
13 * Standard include file for "less".
14 */
15
16/*
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/*
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
48#if HAVE_CONST
49#define	constant	const
50#else
51#define	constant
52#endif
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
73#if HAVE_STDLIB_H
74#include <stdlib.h>
75#endif
76#if HAVE_STRING_H
77#include <string.h>
78#endif
79#ifdef _OSK
80#include <modes.h>
81#include <strings.h>
82#endif
83#if MSDOS_COMPILER==WIN32C
84#include <io.h>
85#endif
86#if MSDOS_COMPILER==DJGPPC
87#include <io.h>
88#include <sys/exceptn.h>
89#include <conio.h>
90#include <pc.h>
91#endif
92
93#if !HAVE_STDLIB_H
94char *getenv();
95off_t lseek();
96VOID_POINTER calloc();
97void free();
98#endif
99
100/*
101 * Simple lowercase test which can be used during option processing
102 * (before options are parsed which might tell us what charset to use).
103 */
104#define SIMPLE_IS_UPPER(c)	((c) >= 'A' && (c) <= 'Z')
105#define SIMPLE_IS_LOWER(c)	((c) >= 'a' && (c) <= 'z')
106#define	SIMPLE_TO_UPPER(c)	((c) - 'a' + 'A')
107#define	SIMPLE_TO_LOWER(c)	((c) - 'A' + 'a')
108
109#if !HAVE_UPPER_LOWER
110#define	isupper(c)	SIMPLE_IS_UPPER(c)
111#define	islower(c)	SIMPLE_IS_LOWER(c)
112#define	toupper(c)	SIMPLE_TO_UPPER(c)
113#define	tolower(c)	SIMPLE_TO_LOWER(c)
114#endif
115
116#ifndef NULL
117#define	NULL	0
118#endif
119
120#ifndef TRUE
121#define	TRUE		1
122#endif
123#ifndef FALSE
124#define	FALSE		0
125#endif
126
127#define	OPT_OFF		0
128#define	OPT_ON		1
129#define	OPT_ONPLUS	2
130
131#if !HAVE_MEMCPY
132#ifndef memcpy
133#define	memcpy(to,from,len)	bcopy((from),(to),(len))
134#endif
135#endif
136
137#define	BAD_LSEEK	((off_t)-1)
138
139/*
140 * Special types and constants.
141 */
142typedef long		POSITION;
143#define PR_POSITION	"%ld"
144#define MAX_PRINT_POSITION 20
145#define MAX_PRINT_INT      10
146
147#define	NULL_POSITION	((POSITION)(-1))
148
149/*
150 * Flags for open()
151 */
152#if MSDOS_COMPILER || OS2
153#define	OPEN_READ	(O_RDONLY|O_BINARY)
154#else
155#ifdef _OSK
156#define	OPEN_READ	(S_IREAD)
157#else
158#ifdef O_RDONLY
159#define	OPEN_READ	(O_RDONLY)
160#else
161#define	OPEN_READ	(0)
162#endif
163#endif
164#endif
165
166#if defined(O_WRONLY) && defined(O_APPEND)
167#define	OPEN_APPEND	(O_APPEND|O_WRONLY)
168#else
169#ifdef _OSK
170#define OPEN_APPEND	(S_IWRITE)
171#else
172#define	OPEN_APPEND	(1)
173#endif
174#endif
175
176/*
177 * Set a file descriptor to binary mode.
178 */
179#if MSDOS_COMPILER==MSOFTC
180#define	SET_BINARY(f)	_setmode(f, _O_BINARY);
181#else
182#if MSDOS_COMPILER
183#define	SET_BINARY(f)	setmode(f, O_BINARY)
184#else
185#define	SET_BINARY(f)
186#endif
187#endif
188
189/*
190 * Does the shell treat "?" as a metacharacter?
191 */
192#if MSDOS_COMPILER || OS2 || _OSK
193#define	SHELL_META_QUEST 0
194#else
195#define	SHELL_META_QUEST 1
196#endif
197
198#define	SPACES_IN_FILENAMES 1
199
200/*
201 * An IFILE represents an input file.
202 */
203#define	IFILE		VOID_POINTER
204#define	NULL_IFILE	((IFILE)NULL)
205
206/*
207 * The structure used to represent a "screen position".
208 * This consists of a file position, and a screen line number.
209 * The meaning is that the line starting at the given file
210 * position is displayed on the ln-th line of the screen.
211 * (Screen lines before ln are empty.)
212 */
213struct scrpos
214{
215	POSITION pos;
216	int ln;
217};
218
219typedef union parg
220{
221	char *p_string;
222	int p_int;
223} PARG;
224
225#define	NULL_PARG	((PARG *)NULL)
226
227struct textlist
228{
229	char *string;
230	char *endstring;
231};
232
233#define	EOI		(-1)
234
235#define	READ_INTR	(-2)
236
237/* How quiet should we be? */
238#define	NOT_QUIET	0	/* Ring bell at eof and for errors */
239#define	LITTLE_QUIET	1	/* Ring bell only for errors */
240#define	VERY_QUIET	2	/* Never ring bell */
241
242/* How should we prompt? */
243#define	PR_SHORT	0	/* Prompt with colon */
244#define	PR_MEDIUM	1	/* Prompt with message */
245#define	PR_LONG		2	/* Prompt with longer message */
246
247/* How should we handle backspaces? */
248#define	BS_SPECIAL	0	/* Do special things for underlining and bold */
249#define	BS_NORMAL	1	/* \b treated as normal char; actually output */
250#define	BS_CONTROL	2	/* \b treated as control char; prints as ^H */
251
252/* How should we search? */
253#define	SRCH_FORW	000001	/* Search forward from current position */
254#define	SRCH_BACK	000002	/* Search backward from current position */
255#define	SRCH_NO_MOVE	000004	/* Highlight, but don't move */
256#define	SRCH_FIND_ALL	000010	/* Find and highlight all matches */
257#define	SRCH_NO_MATCH	000100	/* Search for non-matching lines */
258#define	SRCH_PAST_EOF	000200	/* Search past end-of-file, into next file */
259#define	SRCH_FIRST_FILE	000400	/* Search starting at the first file */
260#define	SRCH_NO_REGEX	001000	/* Don't use regular expressions */
261
262#define	SRCH_REVERSE(t)	(((t) & SRCH_FORW) ? \
263				(((t) & ~SRCH_FORW) | SRCH_BACK) : \
264				(((t) & ~SRCH_BACK) | SRCH_FORW))
265
266/* */
267#define	NO_MCA		0
268#define	MCA_DONE	1
269#define	MCA_MORE	2
270
271#define	CC_OK		0	/* Char was accepted & processed */
272#define	CC_QUIT		1	/* Char was a request to abort current cmd */
273#define	CC_ERROR	2	/* Char could not be accepted due to error */
274#define	CC_PASS		3	/* Char was rejected (internal) */
275
276#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
277
278/* Special chars used to tell put_line() to do something special */
279#define	AT_NORMAL	(0)
280#define	AT_UNDERLINE	(1)
281#define	AT_BOLD		(2)
282#define	AT_BLINK	(3)
283#define	AT_INVIS	(4)
284#define	AT_STANDOUT	(5)
285
286#if IS_EBCDIC_HOST
287/*
288 * Long definition for EBCDIC.
289 * Since the argument is usually a constant, this macro normally compiles
290 * into a constant.
291 */
292#define CONTROL(c) ( \
293	(c)=='[' ? '\047' : \
294	(c)=='a' ? '\001' : \
295	(c)=='b' ? '\002' : \
296	(c)=='c' ? '\003' : \
297	(c)=='d' ? '\067' : \
298	(c)=='e' ? '\055' : \
299	(c)=='f' ? '\056' : \
300	(c)=='g' ? '\057' : \
301	(c)=='h' ? '\026' : \
302	(c)=='i' ? '\005' : \
303	(c)=='j' ? '\025' : \
304	(c)=='k' ? '\013' : \
305	(c)=='l' ? '\014' : \
306	(c)=='m' ? '\015' : \
307	(c)=='n' ? '\016' : \
308	(c)=='o' ? '\017' : \
309	(c)=='p' ? '\020' : \
310	(c)=='q' ? '\021' : \
311	(c)=='r' ? '\022' : \
312	(c)=='s' ? '\023' : \
313	(c)=='t' ? '\074' : \
314	(c)=='u' ? '\075' : \
315	(c)=='v' ? '\062' : \
316	(c)=='w' ? '\046' : \
317	(c)=='x' ? '\030' : \
318	(c)=='y' ? '\031' : \
319	(c)=='z' ? '\077' : \
320	(c)=='A' ? '\001' : \
321	(c)=='B' ? '\002' : \
322	(c)=='C' ? '\003' : \
323	(c)=='D' ? '\067' : \
324	(c)=='E' ? '\055' : \
325	(c)=='F' ? '\056' : \
326	(c)=='G' ? '\057' : \
327	(c)=='H' ? '\026' : \
328	(c)=='I' ? '\005' : \
329	(c)=='J' ? '\025' : \
330	(c)=='K' ? '\013' : \
331	(c)=='L' ? '\014' : \
332	(c)=='M' ? '\015' : \
333	(c)=='N' ? '\016' : \
334	(c)=='O' ? '\017' : \
335	(c)=='P' ? '\020' : \
336	(c)=='Q' ? '\021' : \
337	(c)=='R' ? '\022' : \
338	(c)=='S' ? '\023' : \
339	(c)=='T' ? '\074' : \
340	(c)=='U' ? '\075' : \
341	(c)=='V' ? '\062' : \
342	(c)=='W' ? '\046' : \
343	(c)=='X' ? '\030' : \
344	(c)=='Y' ? '\031' : \
345	(c)=='Z' ? '\077' : \
346	(c)=='|' ? '\031' : \
347	(c)=='\\' ? '\034' : \
348	(c)=='^' ? '\036' : \
349	(c)&077)
350#else
351#define	CONTROL(c)	((c)&037)
352#endif /* IS_EBCDIC_HOST */
353
354#define	ESC		CONTROL('[')
355
356#if _OSK_MWC32
357#define	LSIGNAL(sig,func)	os9_signal(sig,func)
358#else
359#define	LSIGNAL(sig,func)	signal(sig,func)
360#endif
361
362#define	S_INTERRUPT	01
363#define	S_STOP		02
364#define S_WINCH		04
365#define	ABORT_SIGS()	(sigs & (S_INTERRUPT|S_STOP))
366
367#define	QUIT_OK		0
368#define	QUIT_ERROR	1
369#define	QUIT_SAVED_STATUS (-1)
370
371/* filestate flags */
372#define	CH_CANSEEK	001
373#define	CH_KEEPOPEN	002
374#define	CH_POPENED	004
375#define	CH_HELPFILE	010
376
377#define	ch_zero()	((POSITION)0)
378
379#define	FAKE_HELPFILE	"@/\\less/\\help/\\file/\\@"
380
381#include "funcs.h"
382
383