less.h revision 172471 
1/* $FreeBSD: head/contrib/less/less.h 172471 2007-10-08 16:17:42Z delphij $ */
2/*
3 * Copyright (C) 1984-2007  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#define NEWBOT 1
13
14/*
15 * Standard include file for "less".
16 */
17
18/*
19 * Defines for MSDOS_COMPILER.
20 */
21#define	MSOFTC		1	/* Microsoft C */
22#define	BORLANDC	2	/* Borland C */
23#define	WIN32C		3	/* Windows (Borland C or Microsoft C) */
24#define	DJGPPC		4	/* DJGPP C */
25
26/*
27 * Include the file of compile-time options.
28 * The <> make cc search for it in -I., not srcdir.
29 */
30#include <defines.h>
31
32#ifdef _SEQUENT_
33/*
34 * Kludge for Sequent Dynix systems that have sigsetmask, but
35 * it's not compatible with the way less calls it.
36 * {{ Do other systems need this? }}
37 */
38#undef HAVE_SIGSETMASK
39#endif
40
41/*
42 * Language details.
43 */
44#if HAVE_VOID
45#define	VOID_POINTER	void *
46#else
47#define	VOID_POINTER	char *
48#define	void  int
49#endif
50#if HAVE_CONST
51#define	constant	const
52#else
53#define	constant
54#endif
55
56#define	public		/* PUBLIC FUNCTION */
57
58/* Library function declarations */
59
60#if HAVE_SYS_TYPES_H
61#include <sys/types.h>
62#endif
63#if HAVE_STDIO_H
64#include <stdio.h>
65#endif
66#if HAVE_FCNTL_H
67#include <fcntl.h>
68#endif
69#if HAVE_UNISTD_H
70#include <unistd.h>
71#endif
72#if HAVE_CTYPE_H
73#include <ctype.h>
74#endif
75#if HAVE_LIMITS_H
76#include <limits.h>
77#endif
78#if HAVE_STDLIB_H
79#include <stdlib.h>
80#endif
81#if HAVE_STRING_H
82#include <string.h>
83#endif
84
85/* OS-specific includes */
86#ifdef _OSK
87#include <modes.h>
88#include <strings.h>
89#endif
90
91#ifdef __TANDEM
92#include <floss.h>
93#endif
94
95#if MSDOS_COMPILER==WIN32C || OS2
96#include <io.h>
97#endif
98
99#if MSDOS_COMPILER==DJGPPC
100#include <io.h>
101#include <sys/exceptn.h>
102#include <conio.h>
103#include <pc.h>
104#endif
105
106#if !HAVE_STDLIB_H
107char *getenv();
108off_t lseek();
109VOID_POINTER calloc();
110void free();
111#endif
112
113/*
114 * Simple lowercase test which can be used during option processing
115 * (before options are parsed which might tell us what charset to use).
116 */
117#define ASCII_IS_UPPER(c)	((c) >= 'A' && (c) <= 'Z')
118#define ASCII_IS_LOWER(c)	((c) >= 'a' && (c) <= 'z')
119#define	ASCII_TO_UPPER(c)	((c) - 'a' + 'A')
120#define	ASCII_TO_LOWER(c)	((c) - 'A' + 'a')
121
122#undef IS_UPPER
123#undef IS_LOWER
124#undef TO_UPPER
125#undef TO_LOWER
126#undef IS_SPACE
127#undef IS_DIGIT
128
129#if !HAVE_UPPER_LOWER
130#define	IS_UPPER(c)	ASCII_IS_UPPER(c)
131#define	IS_LOWER(c)	ASCII_IS_LOWER(c)
132#define	TO_UPPER(c)	ASCII_TO_UPPER(c)
133#define	TO_LOWER(c)	ASCII_TO_LOWER(c)
134#else
135#define	IS_UPPER(c)	isupper((unsigned char) (c))
136#define	IS_LOWER(c)	islower((unsigned char) (c))
137#define	TO_UPPER(c)	toupper((unsigned char) (c))
138#define	TO_LOWER(c)	tolower((unsigned char) (c))
139#endif
140
141#ifdef isspace
142#define IS_SPACE(c)	isspace((unsigned char)(c))
143#else
144#define IS_SPACE(c)	((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f')
145#endif
146
147#ifdef isdigit
148#define IS_DIGIT(c)	isdigit((unsigned char)(c))
149#else
150#define IS_DIGIT(c)	((c) >= '0' && (c) <= '9')
151#endif
152
153#define IS_CSI_START(c)	((c) == ESC || ((unsigned char)(c)) == CSI)
154
155#ifndef NULL
156#define	NULL	0
157#endif
158
159#ifndef TRUE
160#define	TRUE		1
161#endif
162#ifndef FALSE
163#define	FALSE		0
164#endif
165
166#define	OPT_OFF		0
167#define	OPT_ON		1
168#define	OPT_ONPLUS	2
169
170#if !HAVE_MEMCPY
171#ifndef memcpy
172#define	memcpy(to,from,len)	bcopy((from),(to),(len))
173#endif
174#endif
175
176#if HAVE_SNPRINTF
177#define SNPRINTF1(str, size, fmt, v1)             snprintf((str), (size), (fmt), (v1))
178#define SNPRINTF2(str, size, fmt, v1, v2)         snprintf((str), (size), (fmt), (v1), (v2))
179#define SNPRINTF3(str, size, fmt, v1, v2, v3)     snprintf((str), (size), (fmt), (v1), (v2), (v3))
180#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4))
181#else
182/* Use unsafe sprintf if we don't have snprintf. */
183#define SNPRINTF1(str, size, fmt, v1)             sprintf((str), (fmt), (v1))
184#define SNPRINTF2(str, size, fmt, v1, v2)         sprintf((str), (fmt), (v1), (v2))
185#define SNPRINTF3(str, size, fmt, v1, v2, v3)     sprintf((str), (fmt), (v1), (v2), (v3))
186#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4))
187#endif
188
189#define	BAD_LSEEK	((off_t)-1)
190
191#ifndef CHAR_BIT
192#define CHAR_BIT 8
193#endif
194
195/*
196 * Upper bound on the string length of an integer converted to string.
197 * 302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
198 * add 1 for integer division truncation; add 1 more for a minus sign.
199 */
200#define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
201
202/*
203 * Special types and constants.
204 */
205typedef unsigned long LWCHAR;
206typedef off_t		POSITION;
207typedef off_t		LINENUM;
208#define MIN_LINENUM_WIDTH  7	/* Min printing width of a line number */
209#define MAX_UTF_CHAR_LEN   6	/* Max bytes in one UTF-8 char */
210
211#define	NULL_POSITION	((POSITION)(-1))
212
213/*
214 * Flags for open()
215 */
216#if MSDOS_COMPILER || OS2
217#define	OPEN_READ	(O_RDONLY|O_BINARY)
218#else
219#ifdef _OSK
220#define	OPEN_READ	(S_IREAD)
221#else
222#ifdef O_RDONLY
223#define	OPEN_READ	(O_RDONLY)
224#else
225#define	OPEN_READ	(0)
226#endif
227#endif
228#endif
229
230#if defined(O_WRONLY) && defined(O_APPEND)
231#define	OPEN_APPEND	(O_APPEND|O_WRONLY)
232#else
233#ifdef _OSK
234#define OPEN_APPEND	(S_IWRITE)
235#else
236#define	OPEN_APPEND	(1)
237#endif
238#endif
239
240/*
241 * Set a file descriptor to binary mode.
242 */
243#if MSDOS_COMPILER==MSOFTC
244#define	SET_BINARY(f)	_setmode(f, _O_BINARY);
245#else
246#if MSDOS_COMPILER || OS2
247#define	SET_BINARY(f)	setmode(f, O_BINARY)
248#else
249#define	SET_BINARY(f)
250#endif
251#endif
252
253/*
254 * Does the shell treat "?" as a metacharacter?
255 */
256#if MSDOS_COMPILER || OS2 || _OSK
257#define	SHELL_META_QUEST 0
258#else
259#define	SHELL_META_QUEST 1
260#endif
261
262#define	SPACES_IN_FILENAMES 1
263
264/*
265 * An IFILE represents an input file.
266 */
267#define	IFILE		VOID_POINTER
268#define	NULL_IFILE	((IFILE)NULL)
269
270/*
271 * The structure used to represent a "screen position".
272 * This consists of a file position, and a screen line number.
273 * The meaning is that the line starting at the given file
274 * position is displayed on the ln-th line of the screen.
275 * (Screen lines before ln are empty.)
276 */
277struct scrpos
278{
279	POSITION pos;
280	int ln;
281};
282
283typedef union parg
284{
285	char *p_string;
286	int p_int;
287	LINENUM p_linenum;
288} PARG;
289
290#define	NULL_PARG	((PARG *)NULL)
291
292struct textlist
293{
294	char *string;
295	char *endstring;
296};
297
298#define	EOI		(-1)
299
300#define	READ_INTR	(-2)
301
302/* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
303#define NUM_FRAC_DENOM			1000000
304#define NUM_LOG_FRAC_DENOM		6
305
306/* How quiet should we be? */
307#define	NOT_QUIET	0	/* Ring bell at eof and for errors */
308#define	LITTLE_QUIET	1	/* Ring bell only for errors */
309#define	VERY_QUIET	2	/* Never ring bell */
310
311/* How should we prompt? */
312#define	PR_SHORT	0	/* Prompt with colon */
313#define	PR_MEDIUM	1	/* Prompt with message */
314#define	PR_LONG		2	/* Prompt with longer message */
315
316/* How should we handle backspaces? */
317#define	BS_SPECIAL	0	/* Do special things for underlining and bold */
318#define	BS_NORMAL	1	/* \b treated as normal char; actually output */
319#define	BS_CONTROL	2	/* \b treated as control char; prints as ^H */
320
321/* How should we search? */
322#define	SRCH_FORW	(1 << 0)  /* Search forward from current position */
323#define	SRCH_BACK	(1 << 1)  /* Search backward from current position */
324#define	SRCH_NO_MOVE	(1 << 2)  /* Highlight, but don't move */
325#define	SRCH_FIND_ALL	(1 << 4)  /* Find and highlight all matches */
326#define	SRCH_NO_MATCH	(1 << 8)  /* Search for non-matching lines */
327#define	SRCH_PAST_EOF	(1 << 9)  /* Search past end-of-file, into next file */
328#define	SRCH_FIRST_FILE	(1 << 10) /* Search starting at the first file */
329#define	SRCH_NO_REGEX	(1 << 12) /* Don't use regular expressions */
330
331#define	SRCH_REVERSE(t)	(((t) & SRCH_FORW) ? \
332				(((t) & ~SRCH_FORW) | SRCH_BACK) : \
333				(((t) & ~SRCH_BACK) | SRCH_FORW))
334
335/* */
336#define	NO_MCA		0
337#define	MCA_DONE	1
338#define	MCA_MORE	2
339
340#define	CC_OK		0	/* Char was accepted & processed */
341#define	CC_QUIT		1	/* Char was a request to abort current cmd */
342#define	CC_ERROR	2	/* Char could not be accepted due to error */
343#define	CC_PASS		3	/* Char was rejected (internal) */
344
345#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
346
347/* Special char bit-flags used to tell put_line() to do something special */
348#define	AT_NORMAL	(0)
349#define	AT_UNDERLINE	(1 << 0)
350#define	AT_BOLD		(1 << 1)
351#define	AT_BLINK	(1 << 2)
352#define	AT_STANDOUT	(1 << 3)
353#define	AT_ANSI		(1 << 4)  /* Content-supplied "ANSI" escape sequence */
354#define	AT_BINARY	(1 << 5)  /* LESS*BINFMT representation */
355#define	AT_HILITE	(1 << 6)  /* Internal highlights (e.g., for search) */
356
357#if '0' == 240
358#define IS_EBCDIC_HOST 1
359#endif
360
361#if IS_EBCDIC_HOST
362/*
363 * Long definition for EBCDIC.
364 * Since the argument is usually a constant, this macro normally compiles
365 * into a constant.
366 */
367#define CONTROL(c) ( \
368	(c)=='[' ? '\047' : \
369	(c)=='a' ? '\001' : \
370	(c)=='b' ? '\002' : \
371	(c)=='c' ? '\003' : \
372	(c)=='d' ? '\067' : \
373	(c)=='e' ? '\055' : \
374	(c)=='f' ? '\056' : \
375	(c)=='g' ? '\057' : \
376	(c)=='h' ? '\026' : \
377	(c)=='i' ? '\005' : \
378	(c)=='j' ? '\025' : \
379	(c)=='k' ? '\013' : \
380	(c)=='l' ? '\014' : \
381	(c)=='m' ? '\015' : \
382	(c)=='n' ? '\016' : \
383	(c)=='o' ? '\017' : \
384	(c)=='p' ? '\020' : \
385	(c)=='q' ? '\021' : \
386	(c)=='r' ? '\022' : \
387	(c)=='s' ? '\023' : \
388	(c)=='t' ? '\074' : \
389	(c)=='u' ? '\075' : \
390	(c)=='v' ? '\062' : \
391	(c)=='w' ? '\046' : \
392	(c)=='x' ? '\030' : \
393	(c)=='y' ? '\031' : \
394	(c)=='z' ? '\077' : \
395	(c)=='A' ? '\001' : \
396	(c)=='B' ? '\002' : \
397	(c)=='C' ? '\003' : \
398	(c)=='D' ? '\067' : \
399	(c)=='E' ? '\055' : \
400	(c)=='F' ? '\056' : \
401	(c)=='G' ? '\057' : \
402	(c)=='H' ? '\026' : \
403	(c)=='I' ? '\005' : \
404	(c)=='J' ? '\025' : \
405	(c)=='K' ? '\013' : \
406	(c)=='L' ? '\014' : \
407	(c)=='M' ? '\015' : \
408	(c)=='N' ? '\016' : \
409	(c)=='O' ? '\017' : \
410	(c)=='P' ? '\020' : \
411	(c)=='Q' ? '\021' : \
412	(c)=='R' ? '\022' : \
413	(c)=='S' ? '\023' : \
414	(c)=='T' ? '\074' : \
415	(c)=='U' ? '\075' : \
416	(c)=='V' ? '\062' : \
417	(c)=='W' ? '\046' : \
418	(c)=='X' ? '\030' : \
419	(c)=='Y' ? '\031' : \
420	(c)=='Z' ? '\077' : \
421	(c)=='|' ? '\031' : \
422	(c)=='\\' ? '\034' : \
423	(c)=='^' ? '\036' : \
424	(c)&077)
425#else
426#define	CONTROL(c)	((c)&037)
427#endif /* IS_EBCDIC_HOST */
428
429#define	ESC		CONTROL('[')
430#define	CSI		((unsigned char)'\233')
431
432#if _OSK_MWC32
433#define	LSIGNAL(sig,func)	os9_signal(sig,func)
434#else
435#define	LSIGNAL(sig,func)	signal(sig,func)
436#endif
437
438#if HAVE_SIGPROCMASK
439#if HAVE_SIGSET_T
440#else
441#undef HAVE_SIGPROCMASK
442#endif
443#endif
444#if HAVE_SIGPROCMASK
445#if HAVE_SIGEMPTYSET
446#else
447#undef  sigemptyset
448#define sigemptyset(mp) *(mp) = 0
449#endif
450#endif
451
452#define	S_INTERRUPT	01
453#define	S_STOP		02
454#define S_WINCH		04
455#define	ABORT_SIGS()	(sigs & (S_INTERRUPT|S_STOP))
456
457#define	QUIT_OK		0
458#define	QUIT_ERROR	1
459#define	QUIT_SAVED_STATUS (-1)
460
461/* filestate flags */
462#define	CH_CANSEEK	001
463#define	CH_KEEPOPEN	002
464#define	CH_POPENED	004
465#define	CH_HELPFILE	010
466
467#define	ch_zero()	((POSITION)0)
468
469#define	FAKE_HELPFILE	"@/\\less/\\help/\\file/\\@"
470
471#include "funcs.h"
472
473/* Functions not included in funcs.h */
474void postoa();
475void linenumtoa();
476void inttoa();
477