File: less.h

package info (click to toggle)
jless 382-iso262-2
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 1,808 kB
  • ctags: 1,332
  • sloc: sh: 18,019; ansic: 15,553; makefile: 81; awk: 7
file content (418 lines) | stat: -rw-r--r-- 8,992 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
/*
 * Copyright (C) 1984-2002  Mark Nudelman
 *
 * You may distribute under the terms of either the GNU General Public
 * License or the Less License, as specified in the README file.
 *
 * For more information about less, or for information on how to 
 * contact the author, see the README file.
 */


/*
 * Standard include file for "less".
 */

/*
 * Defines for MSDOS_COMPILER.
 */
#define	MSOFTC		1	/* Microsoft C */
#define	BORLANDC	2	/* Borland C */
#define	WIN32C		3	/* Windows (Borland C or Microsoft C) */
#define	DJGPPC		4	/* DJGPP C */

/*
 * Include the file of compile-time options.
 * The <> make cc search for it in -I., not srcdir.
 */
#include <defines.h>

#ifdef _SEQUENT_
/*
 * Kludge for Sequent Dynix systems that have sigsetmask, but
 * it's not compatible with the way less calls it.
 * {{ Do other systems need this? }}
 */
#undef HAVE_SIGSETMASK
#endif

/*
 * Language details.
 */
#if HAVE_VOID
#define	VOID_POINTER	void *
#else
#define	VOID_POINTER	char *
#define	void  int
#endif
#if HAVE_CONST
#define	constant	const
#else
#define	constant
#endif

#define	public		/* PUBLIC FUNCTION */

/* Library function declarations */

#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_CTYPE_H
#include <ctype.h>
#endif
#if HAVE_LIMITS_H
#include <limits.h>
#endif
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#ifdef _OSK
#include <modes.h>
#include <strings.h>
#endif
#if MSDOS_COMPILER==WIN32C || OS2
#include <io.h>
#endif
#if MSDOS_COMPILER==DJGPPC
#include <io.h>
#include <sys/exceptn.h>
#include <conio.h>
#include <pc.h>
#endif

#if !HAVE_STDLIB_H
char *getenv();
off_t lseek();
VOID_POINTER calloc();
void free();
#endif

/*
 * Simple lowercase test which can be used during option processing
 * (before options are parsed which might tell us what charset to use).
 */
#define SIMPLE_IS_UPPER(c)	((c) >= 'A' && (c) <= 'Z')
#define SIMPLE_IS_LOWER(c)	((c) >= 'a' && (c) <= 'z')
#define	SIMPLE_TO_UPPER(c)	((c) - 'a' + 'A')
#define	SIMPLE_TO_LOWER(c)	((c) - 'A' + 'a')

#if !HAVE_UPPER_LOWER
#define	isupper(c)	SIMPLE_IS_UPPER(c)
#define	islower(c)	SIMPLE_IS_LOWER(c)
#define	toupper(c)	SIMPLE_TO_UPPER(c)
#define	tolower(c)	SIMPLE_TO_LOWER(c)
#endif

#ifndef NULL
#define	NULL	0
#endif

#ifndef TRUE
#define	TRUE		1
#endif
#ifndef FALSE
#define	FALSE		0
#endif

#define	OPT_OFF		0
#define	OPT_ON		1
#define	OPT_ONPLUS	2

#if !HAVE_MEMCPY
#ifndef memcpy
#define	memcpy(to,from,len)	bcopy((from),(to),(len))
#endif
#endif

#define	BAD_LSEEK	((off_t)-1)

#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif

/*
 * Upper bound on the string length of an integer converted to string.
 * 302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
 * add 1 for integer division truncation; add 1 more for a minus sign.
 */
#define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)

/*
 * Special types and constants.
 */
typedef off_t		POSITION;
typedef off_t		LINENUM;
#define MIN_LINENUM_WIDTH  7	/* Min printing width of a line number */

#define	NULL_POSITION	((POSITION)(-1))

/*
 * Flags for open()
 */
#if MSDOS_COMPILER || OS2
#define	OPEN_READ	(O_RDONLY|O_BINARY)
#else
#ifdef _OSK
#define	OPEN_READ	(S_IREAD)
#else
#ifdef O_RDONLY
#define	OPEN_READ	(O_RDONLY)
#else
#define	OPEN_READ	(0)
#endif
#endif
#endif

#if defined(O_WRONLY) && defined(O_APPEND)
#define	OPEN_APPEND	(O_APPEND|O_WRONLY)
#else
#ifdef _OSK
#define OPEN_APPEND	(S_IWRITE)
#else
#define	OPEN_APPEND	(1)
#endif
#endif

/*
 * Set a file descriptor to binary mode.
 */
#if MSDOS_COMPILER==MSOFTC
#define	SET_BINARY(f)	_setmode(f, _O_BINARY);
#else
#if MSDOS_COMPILER || OS2
#define	SET_BINARY(f)	setmode(f, O_BINARY)
#else
#define	SET_BINARY(f)
#endif
#endif

/*
 * Does the shell treat "?" as a metacharacter?
 */
#if MSDOS_COMPILER || OS2 || _OSK
#define	SHELL_META_QUEST 0
#else
#define	SHELL_META_QUEST 1
#endif

#define	SPACES_IN_FILENAMES 1

/*
 * An IFILE represents an input file.
 */
#define	IFILE		VOID_POINTER
#define	NULL_IFILE	((IFILE)NULL)

/*
 * The structure used to represent a "screen position".
 * This consists of a file position, and a screen line number.
 * The meaning is that the line starting at the given file
 * position is displayed on the ln-th line of the screen.
 * (Screen lines before ln are empty.)
 */
struct scrpos
{
	POSITION pos;
	int ln;
};

typedef union parg
{
	char *p_string;
	int p_int;
	LINENUM p_linenum;
} PARG;

#define	NULL_PARG	((PARG *)NULL)

struct textlist
{
	char *string;
	char *endstring;
};

#define	EOI		(-1)

#define	READ_INTR	(-2)

/* How quiet should we be? */
#define	NOT_QUIET	0	/* Ring bell at eof and for errors */
#define	LITTLE_QUIET	1	/* Ring bell only for errors */
#define	VERY_QUIET	2	/* Never ring bell */

/* How should we prompt? */
#define	PR_SHORT	0	/* Prompt with colon */
#define	PR_MEDIUM	1	/* Prompt with message */
#define	PR_LONG		2	/* Prompt with longer message */

/* How should we handle backspaces? */
#define	BS_SPECIAL	0	/* Do special things for underlining and bold */
#define	BS_NORMAL	1	/* \b treated as normal char; actually output */
#define	BS_CONTROL	2	/* \b treated as control char; prints as ^H */

/* How should we search? */
#define	SRCH_FORW	000001	/* Search forward from current position */
#define	SRCH_BACK	000002	/* Search backward from current position */
#define	SRCH_NO_MOVE	000004	/* Highlight, but don't move */
#define	SRCH_FIND_ALL	000010	/* Find and highlight all matches */
#define	SRCH_NO_MATCH	000100	/* Search for non-matching lines */
#define	SRCH_PAST_EOF	000200	/* Search past end-of-file, into next file */
#define	SRCH_FIRST_FILE	000400	/* Search starting at the first file */
#define	SRCH_NO_REGEX	001000	/* Don't use regular expressions */

#define	SRCH_REVERSE(t)	(((t) & SRCH_FORW) ? \
				(((t) & ~SRCH_FORW) | SRCH_BACK) : \
				(((t) & ~SRCH_BACK) | SRCH_FORW))

/* */
#define	NO_MCA		0
#define	MCA_DONE	1
#define	MCA_MORE	2

#define	CC_OK		0	/* Char was accepted & processed */
#define	CC_QUIT		1	/* Char was a request to abort current cmd */
#define	CC_ERROR	2	/* Char could not be accepted due to error */
#define	CC_PASS		3	/* Char was rejected (internal) */

#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */

/* Special chars used to tell put_line() to do something special */
#define	AT_NORMAL	(0)
#define	AT_UNDERLINE	(1)
#define	AT_BOLD		(2)
#define	AT_BLINK	(3)
#define	AT_INVIS	(4)
#define	AT_STANDOUT	(5)

#if '0' == 240
#define IS_EBCDIC_HOST 1
#endif

#if IS_EBCDIC_HOST
/*
 * Long definition for EBCDIC.
 * Since the argument is usually a constant, this macro normally compiles
 * into a constant.
 */
#define CONTROL(c) ( \
	(c)=='[' ? '\047' : \
	(c)=='a' ? '\001' : \
	(c)=='b' ? '\002' : \
	(c)=='c' ? '\003' : \
	(c)=='d' ? '\067' : \
	(c)=='e' ? '\055' : \
	(c)=='f' ? '\056' : \
	(c)=='g' ? '\057' : \
	(c)=='h' ? '\026' : \
	(c)=='i' ? '\005' : \
	(c)=='j' ? '\025' : \
	(c)=='k' ? '\013' : \
	(c)=='l' ? '\014' : \
	(c)=='m' ? '\015' : \
	(c)=='n' ? '\016' : \
	(c)=='o' ? '\017' : \
	(c)=='p' ? '\020' : \
	(c)=='q' ? '\021' : \
	(c)=='r' ? '\022' : \
	(c)=='s' ? '\023' : \
	(c)=='t' ? '\074' : \
	(c)=='u' ? '\075' : \
	(c)=='v' ? '\062' : \
	(c)=='w' ? '\046' : \
	(c)=='x' ? '\030' : \
	(c)=='y' ? '\031' : \
	(c)=='z' ? '\077' : \
	(c)=='A' ? '\001' : \
	(c)=='B' ? '\002' : \
	(c)=='C' ? '\003' : \
	(c)=='D' ? '\067' : \
	(c)=='E' ? '\055' : \
	(c)=='F' ? '\056' : \
	(c)=='G' ? '\057' : \
	(c)=='H' ? '\026' : \
	(c)=='I' ? '\005' : \
	(c)=='J' ? '\025' : \
	(c)=='K' ? '\013' : \
	(c)=='L' ? '\014' : \
	(c)=='M' ? '\015' : \
	(c)=='N' ? '\016' : \
	(c)=='O' ? '\017' : \
	(c)=='P' ? '\020' : \
	(c)=='Q' ? '\021' : \
	(c)=='R' ? '\022' : \
	(c)=='S' ? '\023' : \
	(c)=='T' ? '\074' : \
	(c)=='U' ? '\075' : \
	(c)=='V' ? '\062' : \
	(c)=='W' ? '\046' : \
	(c)=='X' ? '\030' : \
	(c)=='Y' ? '\031' : \
	(c)=='Z' ? '\077' : \
	(c)=='|' ? '\031' : \
	(c)=='\\' ? '\034' : \
	(c)=='^' ? '\036' : \
	(c)&077)
#else
#define	CONTROL(c)	((c)&037)
#endif /* IS_EBCDIC_HOST */

#define	ESC		CONTROL('[')

#if _OSK_MWC32
#define	LSIGNAL(sig,func)	os9_signal(sig,func)
#else
#define	LSIGNAL(sig,func)	signal(sig,func)
#endif

#if HAVE_SIGPROCMASK
#if HAVE_SIGSET_T
#else
#undef HAVE_SIGPROCMASK
#endif
#endif
#if HAVE_SIGPROCMASK
#if HAVE_SIGEMPTYSET
#else
#undef  sigemptyset
#define sigemptyset(mp) *(mp) = 0
#endif
#endif

#define	S_INTERRUPT	01
#define	S_STOP		02
#define S_WINCH		04
#define	ABORT_SIGS()	(sigs & (S_INTERRUPT|S_STOP))

#define	QUIT_OK		0
#define	QUIT_ERROR	1
#define	QUIT_SAVED_STATUS (-1)

/* filestate flags */
#define	CH_CANSEEK	001
#define	CH_KEEPOPEN	002
#define	CH_POPENED	004
#define	CH_HELPFILE	010

#define	ch_zero()	((POSITION)0)

#define	FAKE_HELPFILE	"@/\\less/\\help/\\file/\\@"

#include "funcs.h"

/* Functions not included in funcs.h */
void postoa();
void linenumtoa();
void inttoa();