diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/miscellany/less-177/less.h

   1 /*
   2  * Standard include file for "less".
   3  */
   4
   5 /*
   6  * Include the file of compile-time options.
   7  */
   8 #include "defines.h"
   9
  10 /*
  11  * Language details.
  12  */
  13 #if !VOID
  14 #define void  int
  15 #endif
  16 #define public          /* PUBLIC FUNCTION */
  17
  18 /*
  19  * Special types and constants.
  20  */
  21 typedef long            POSITION;
  22 /*
  23  * {{ Warning: if POSITION is changed to other than "long",
  24  *    you may have to change some of the printfs which use "%ld"
  25  *    to print a variable of type POSITION. }}
  26  */
  27
  28 #define NULL_POSITION   ((POSITION)(-1))
  29
  30 /*
  31  * The type of an interrupt handler.
  32  */
  33 #define HANDLER         void
  34
  35 /*
  36  * An IFILE represents an input file.
  37  */
  38 #define IFILE           VOID_POINTER
  39 #define NULL_IFILE      ((IFILE)NULL)
  40
  41 /*
  42  * The structure used to represent a "screen position".
  43  * This consists of a file position, and a screen line number.
  44  * The meaning is that the line starting at the given file
  45  * position is displayed on the ln-th line of the screen.
  46  * (Screen lines before ln are empty.)
  47  */
  48 struct scrpos
  49 {
  50         POSITION pos;
  51         int ln;
  52 };
  53
  54 typedef union parg
  55 {
  56         char *p_string;
  57         int p_int;
  58 } PARG;
  59
  60 #define NULL_PARG       ((PARG *)NULL)
  61
  62 #define EOI             (-1)
  63
  64 #ifndef NULL
  65 #define NULL            (0)
  66 #endif
  67
  68 #define READ_INTR       (-2)
  69
  70 /* How quiet should we be? */
  71 #define NOT_QUIET       0       /* Ring bell at eof and for errors */
  72 #define LITTLE_QUIET    1       /* Ring bell only for errors */
  73 #define VERY_QUIET      2       /* Never ring bell */
  74
  75 /* How should we prompt? */
  76 #define PR_SHORT        0       /* Prompt with colon */
  77 #define PR_MEDIUM       1       /* Prompt with message */
  78 #define PR_LONG         2       /* Prompt with longer message */
  79
  80 /* How should we handle backspaces? */
  81 #define BS_SPECIAL      0       /* Do special things for underlining and bold */
  82 #define BS_NORMAL       1       /* \b treated as normal char; actually output */
  83 #define BS_CONTROL      2       /* \b treated as control char; prints as ^H */
  84
  85 /* How should we search? */
  86 #define SRCH_FORW       0       /* Search forward from current position */
  87 #define SRCH_BACK       1       /* Search backward from current position */
  88 #define SRCH_NOMATCH    0100    /* Search for non-matching lines */
  89 #define SRCH_PAST_EOF   0200    /* Search past end-of-file, into next file */
  90 #define SRCH_FIRST_FILE 0400    /* Search starting at the first file */
  91
  92 #define SRCH_DIR(t)     ((t) & 01)
  93 #define SRCH_REVERSE(t) ((t) ^ 01)
  94
  95 /* Special chars used to tell put_line() to do something special */
  96 #define NORMAL          (0)
  97 #define UNDERLINE       (1)
  98 #define BOLD            (2)
  99 #define BLINK           (3)
 100 #define INVIS           (4)
 101
 102 #define CONTROL(c)              ((c)&037)
 103 #define ESC                     CONTROL('[')
 104
 105 #define SIGNAL(sig,func)        signal(sig,func)
 106
 107 /* Library function declarations */
 108 offset_t lseek();
 109 #define BAD_LSEEK       ((offset_t)-1)
 110 VOID_POINTER calloc();
 111
 112 #define ch_zero()       ((POSITION)0)
 113 #include "funcs.h"