Annotation of src/usr.bin/less/less.h, Revision 1.2
1.1 etheisen 1: /*
2: * Copyright (c) 1984,1985,1989,1994,1995 Mark Nudelman
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice in the documentation and/or other materials provided with
12: * the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
15: * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
18: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
20: * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
21: * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
23: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
24: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27:
28: /*
29: * Standard include file for "less".
30: */
31:
32: /*
33: * Include the file of compile-time options.
34: * The <> make cc search for it in -I., not srcdir.
35: */
36: #include <defines.h>
37:
38: #ifdef _SEQUENT_
39: /*
40: * Kludge for Sequent Dynix systems that have sigsetmask, but
41: * it's not compatible with the way less calls it.
42: * {{ Do other systems need this? }}
43: */
44: #undef HAVE_SIGSETMASK
45: #endif
46:
47: /*
48: * Language details.
49: */
50: #if HAVE_VOID
51: #define VOID_POINTER void *
52: #else
53: #define VOID_POINTER char *
54: #define void int
55: #endif
56:
57: #define public /* PUBLIC FUNCTION */
58:
59: /* Library function declarations */
60:
61: #if HAVE_SYS_TYPES_H
62: #include <sys/types.h>
63: #endif
64: #if HAVE_STDIO_H
65: #include <stdio.h>
66: #endif
67: #if HAVE_FCNTL_H
68: #include <fcntl.h>
69: #endif
70: #if HAVE_UNISTD_H
71: #include <unistd.h>
72: #endif
73: #if HAVE_CTYPE_H
74: #include <ctype.h>
75: #endif
76: #if STDC_HEADERS
77: #include <stdlib.h>
78: #include <string.h>
79: #endif
80:
81: #if !STDC_HEADERS
82: char *getenv();
83: off_t lseek();
84: VOID_POINTER calloc();
85: void free();
86: #endif
87:
88: #if !HAVE_UPPER_LOWER
89: #define isupper(c) ((c) >= 'A' && (c) <= 'Z')
90: #define islower(c) ((c) >= 'a' && (c) <= 'z')
91: #define toupper(c) ((c) - 'a' + 'A')
92: #define tolower(c) ((c) - 'A' + 'a')
93: #endif
94:
95: #ifndef NULL
96: #define NULL 0
97: #endif
98:
99: #ifndef TRUE
100: #define TRUE 1
101: #endif
102: #ifndef FALSE
103: #define FALSE 0
104: #endif
105:
106: #define OPT_OFF 0
107: #define OPT_ON 1
108: #define OPT_ONPLUS 2
109:
110: #ifndef HAVE_MEMCPY
111: #ifndef memcpy
112: #define memcpy(to,from,len) bcopy((from),(to),(len))
113: #endif
114: #endif
115:
116: #define BAD_LSEEK ((off_t)-1)
117:
118: /*
119: * Special types and constants.
120: */
1.2 ! millert 121: typedef off_t POSITION;
1.1 etheisen 122: /*
123: * {{ Warning: if POSITION is changed to other than "long",
124: * you may have to change some of the printfs which use "%ld"
125: * to print a variable of type POSITION. }}
126: */
127:
128: #define NULL_POSITION ((POSITION)(-1))
129:
130: /*
131: * Flags for open()
132: */
133: #if MSOFTC || OS2
134: #define OPEN_READ (O_RDONLY|O_BINARY)
135: #else
136: #define OPEN_READ (0)
137: #endif
138: #if MSOFTC || OS2
139: #define OPEN_APPEND (O_APPEND|O_WRONLY)
140: #else
141: #define OPEN_APPEND (1)
142: #endif
143:
144: #if MSOFTC || OS2
145: #define OPEN_TTYIN() open("CON", O_BINARY|O_RDONLY)
146: #else
147: #define OPEN_TTYIN() open("/dev/tty", 0)
148: #endif
149:
150: /*
151: * An IFILE represents an input file.
152: */
153: #define IFILE VOID_POINTER
154: #define NULL_IFILE ((IFILE)NULL)
155:
156: /*
157: * The structure used to represent a "screen position".
158: * This consists of a file position, and a screen line number.
159: * The meaning is that the line starting at the given file
160: * position is displayed on the ln-th line of the screen.
161: * (Screen lines before ln are empty.)
162: */
163: struct scrpos
164: {
165: POSITION pos;
166: int ln;
167: };
168:
169: typedef union parg
170: {
171: char *p_string;
172: int p_int;
173: } PARG;
174:
175: #define NULL_PARG ((PARG *)NULL)
176:
177: struct textlist
178: {
179: char *string;
180: char *endstring;
181: };
182:
183: #define EOI (-1)
184:
185: #define READ_INTR (-2)
186:
187: /* How quiet should we be? */
188: #define NOT_QUIET 0 /* Ring bell at eof and for errors */
189: #define LITTLE_QUIET 1 /* Ring bell only for errors */
190: #define VERY_QUIET 2 /* Never ring bell */
191:
192: /* How should we prompt? */
193: #define PR_SHORT 0 /* Prompt with colon */
194: #define PR_MEDIUM 1 /* Prompt with message */
195: #define PR_LONG 2 /* Prompt with longer message */
196:
197: /* How should we handle backspaces? */
198: #define BS_SPECIAL 0 /* Do special things for underlining and bold */
199: #define BS_NORMAL 1 /* \b treated as normal char; actually output */
200: #define BS_CONTROL 2 /* \b treated as control char; prints as ^H */
201:
202: /* How should we search? */
203: #define SRCH_FORW 0001 /* Search forward from current position */
204: #define SRCH_BACK 0002 /* Search backward from current position */
205: #define SRCH_FIND_ALL 0010 /* Find and highlight all matches */
206: #define SRCH_NOMATCH 0100 /* Search for non-matching lines */
207: #define SRCH_PAST_EOF 0200 /* Search past end-of-file, into next file */
208: #define SRCH_FIRST_FILE 0400 /* Search starting at the first file */
209:
210: #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
211: (((t) & ~SRCH_FORW) | SRCH_BACK) : \
212: (((t) & ~SRCH_BACK) | SRCH_FORW))
213:
214: /* */
215: #define NO_MCA 0
216: #define MCA_DONE 1
217: #define MCA_MORE 2
218:
219: #define CC_OK 0 /* Char was accepted & processed */
220: #define CC_QUIT 1 /* Char was a request to abort current cmd */
221: #define CC_ERROR 2 /* Char could not be accepted due to error */
222: #define CC_PASS 3 /* Char was rejected (internal) */
223:
224: /* Special chars used to tell put_line() to do something special */
225: #define AT_NORMAL (0)
226: #define AT_UNDERLINE (1)
227: #define AT_BOLD (2)
228: #define AT_BLINK (3)
229: #define AT_INVIS (4)
230: #define AT_STANDOUT (5)
231:
232: #define CONTROL(c) ((c)&037)
233: #define ESC CONTROL('[')
234:
235: #define SIGNAL(sig,func) signal(sig,func)
236:
237: #define S_INTERRUPT 01
238: #define S_STOP 02
239: #define S_WINCH 04
240: #define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP))
241:
242: #define QUIT_OK 0
243: #define QUIT_ERROR 1
244: #define QUIT_SAVED_STATUS (-1)
245:
246: /* filestate flags */
247: #define CH_CANSEEK 001
248: #define CH_KEEPOPEN 002
249: #define CH_POPENED 004
250:
251: #define ch_zero() ((POSITION)0)
252:
253: #include "funcs.h"
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