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 */ 121 typedef long POSITION; 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" 254