lib/curses/cursesio.c

   1 #include <stdlib.h>
   2 #include <termcap.h>
   3 #include <sys/types.h>
   4 #include <sys/ioctl.h>
   5 #include <curses.h>
   6 #include "curspriv.h"
   7
   8 struct termios _orig_tty, _tty;
   9 cursv _cursvar;
  10
  11 WINDOW *stdscr, *curscr;
  12 int LINES, COLS;
  13 bool NONL;
  14
  15 char termcap[1024];             /* termcap buffer */
  16 char tc[200];                   /* area to hold string capabilities */
  17 char *ttytype;                  /* terminal type from env */
  18 static char *arp;               /* pointer for use in tgetstr */
  19 char *cp;                       /* character pointer */
  20
  21 char *cl;                       /* clear screen capability */
  22 char *cm;                       /* cursor motion capability */
  23 char *so;                       /* start standout capability */
  24 char *se;                       /* end standout capability */
  25 char *mr;                       /* start of reverse */
  26 char *me;                       /* revert to normal */
  27 char *mb;                       /* start of blink */
  28 char *md;                       /* start of bold */
  29 char *us;                       /* start of underscore */
  30 char *ue;                       /* end of underscore */
  31 char *vi;                       /* cursor invisible */
  32 char *ve;                       /* cursor normal */
  33 char *vs;                       /* cursor good visible */
  34 char *as;                       /* alternative charset start */
  35 char *ae;                       /* alternative charset end */
  36 char *bl;                       /* ring the bell */
  37 char *vb;                       /* visual bell */
  38
  39 /* fatal - report error and die. Never returns */
  40 void fatal(s)
  41 char *s;
  42 {
  43   (void) fprintf(stderr, "curses: %s\n", s);
  44   exit(1);
  45 }
  46
  47 /* Outc - call putchar, necessary because putchar is a macro. */
  48 void outc(c)
  49 int c;
  50 {
  51   putchar(c);
  52 }
  53
  54 /* Move cursor to r,c */
  55 void poscur(r, c)
  56 int r, c;
  57 {
  58   tputs(tgoto(cm, c, r), 1, outc);
  59 }
  60
  61 /* Clear the screen */
  62 void clrscr()
  63 {
  64   tputs(cl, 1, outc);
  65 }
  66
  67 /* This are terminal independent characters which can be used in curses */
  68
  69 unsigned int ACS_ULCORNER;
  70 unsigned int ACS_LLCORNER;
  71 unsigned int ACS_URCORNER;
  72 unsigned int ACS_LRCORNER;
  73 unsigned int ACS_RTEE;
  74 unsigned int ACS_LTEE;
  75 unsigned int ACS_BTEE;
  76 unsigned int ACS_TTEE;
  77 unsigned int ACS_HLINE;
  78 unsigned int ACS_VLINE;
  79 unsigned int ACS_PLUS;
  80 unsigned int ACS_S1;
  81 unsigned int ACS_S9;
  82 unsigned int ACS_DIAMOND;
  83 unsigned int ACS_CKBOARD;
  84 unsigned int ACS_DEGREE;
  85 unsigned int ACS_PLMINUS;
  86 unsigned int ACS_BULLET;
  87 unsigned int ACS_LARROW;
  88 unsigned int ACS_RARROW;
  89 unsigned int ACS_DARROW;
  90 unsigned int ACS_UARROW;
  91 unsigned int ACS_BOARD;
  92 unsigned int ACS_LANTERN;
  93 unsigned int ACS_BLOCK;
  94
  95 /* These defines describe the full set of grafic block characters which
  96  * can be defined via termcap.
  97  */
  98
  99 #define RIGHTARROW  0
 100 #define LEFTARROW   1
 101 #define DOWNARROW   2
 102 #define UPARROW     3
 103 #define FULLSQUARE  4
 104 #define GREYSQUARE  5
 105 #define EMPTYSQUARE 6
 106 #define LATERN      7
 107 #define DIAMOND     8
 108 #define DEGREE      9
 109 #define PLUSMINUS  10
 110 #define DOWNRIGHT  11
 111 #define UPRIGHT    12
 112 #define UPLEFT     13
 113 #define DOWNLEFT   14
 114 #define CROSS      15
 115 #define UPLINE     16
 116 #define UPMIDLINE  17
 117 #define MIDLINE    18
 118 #define DOMIDLINE  19
 119 #define DOWNLINE   20
 120 #define TEELEFT    21
 121 #define TEERIGHT   22
 122 #define TEEHEAD    23
 123 #define TEENORMAL  24
 124 #define VERTLINE   25
 125 #define PARAGRAPH  26
 126
 127 unsigned int _cursgraftable[27] =
 128 {
 129  '>', '<', 'v', '^', '#', ':', ' ', '#', '+', '\'', '#', '+', '+',
 130  '+', '+', '+', '-', ' ', '-', ' ', '_', '+', '+', '+', '+', '|'
 131 };
 132 char _cursident[28] = "+,.-0ahI`fgjklmnopqrstuvwx~";
 133
 134 int setterm(type)
 135 char *type;
 136 {
 137   unsigned char *ac;
 138   int i;
 139 #ifdef TIOCGWINSZ
 140   struct winsize wsize;
 141 #endif
 142
 143   if (tgetent(termcap, type) != 1) return ERR;
 144
 145 #ifdef TIOCGWINSZ
 146   if (ioctl(0, TIOCGWINSZ, &wsize) == 0) {
 147         LINES = wsize.ws_row != 0 ? wsize.ws_row : tgetnum("li");
 148         COLS = wsize.ws_col != 0 ? wsize.ws_col : tgetnum("co");
 149   } else {
 150 #endif
 151         LINES = tgetnum("li");
 152         COLS = tgetnum("co");
 153 #ifdef TIOCGWINSZ
 154   }
 155 #endif
 156   arp = tc;
 157   cl = tgetstr("cl", &arp);
 158   so = tgetstr("so", &arp);
 159   se = tgetstr("se", &arp);
 160   cm = tgetstr("cm", &arp);
 161   mr = tgetstr("mr", &arp);
 162   me = tgetstr("me", &arp);
 163   mb = tgetstr("mb", &arp);
 164   md = tgetstr("md", &arp);
 165   us = tgetstr("us", &arp);
 166   ue = tgetstr("ue", &arp);
 167   vi = tgetstr("vi", &arp);
 168   ve = tgetstr("ve", &arp);
 169   vs = tgetstr("vs", &arp);
 170   as = tgetstr("as", &arp);
 171   ae = tgetstr("ae", &arp);
 172   ac = (unsigned char *) tgetstr("ac", &arp);
 173   bl = tgetstr("bl", &arp);
 174   vb = tgetstr("vb", &arp);
 175
 176   if (ac) {
 177         while (*ac) {
 178                 i = 0;
 179                 while (*ac != _cursident[i]) i++;
 180                 _cursgraftable[i] = *++ac | A_ALTCHARSET;
 181                 ac++;
 182         }
 183   }
 184
 185   ACS_ULCORNER = _cursgraftable[UPLEFT];
 186   ACS_LLCORNER = _cursgraftable[DOWNLEFT];
 187   ACS_URCORNER = _cursgraftable[UPRIGHT];
 188   ACS_LRCORNER = _cursgraftable[DOWNRIGHT];
 189   ACS_RTEE = _cursgraftable[TEERIGHT];
 190   ACS_LTEE = _cursgraftable[TEELEFT];
 191   ACS_BTEE = _cursgraftable[TEEHEAD];
 192   ACS_TTEE = _cursgraftable[TEENORMAL];
 193   ACS_HLINE = _cursgraftable[MIDLINE];
 194   ACS_VLINE = _cursgraftable[VERTLINE];
 195   ACS_PLUS = _cursgraftable[CROSS];
 196   ACS_S1 = _cursgraftable[UPLINE];
 197   ACS_S9 = _cursgraftable[DOWNLINE];
 198   ACS_DIAMOND = _cursgraftable[DIAMOND];
 199   ACS_CKBOARD = _cursgraftable[GREYSQUARE];
 200   ACS_DEGREE = _cursgraftable[DEGREE];
 201   ACS_PLMINUS = _cursgraftable[PLUSMINUS];
 202   ACS_BULLET = 'o';             /* where the hell is a bullet defined in
 203                          * termcap ??? */
 204   ACS_LARROW = _cursgraftable[LEFTARROW];
 205   ACS_RARROW = _cursgraftable[RIGHTARROW];
 206   ACS_DARROW = _cursgraftable[DOWNARROW];
 207   ACS_UARROW = _cursgraftable[UPARROW];
 208   ACS_BOARD = _cursgraftable[EMPTYSQUARE];
 209   ACS_LANTERN = _cursgraftable[LATERN];
 210   ACS_BLOCK = _cursgraftable[FULLSQUARE];
 211   /* Wow, I got it! */
 212   return OK;
 213 }
 214
 215 void gettmode()
 216 {
 217   tcgetattr(0, &_orig_tty);
 218   tcgetattr(0, &_tty);
 219   _cursvar.echoit = (_tty.c_lflag & ECHO) != 0;
 220   _cursvar.rawmode = (_tty.c_lflag & (ICANON|ISIG)) == 0;
 221   _cursvar.cbrkmode = (_tty.c_lflag & (ICANON|ISIG)) == ISIG;
 222   NONL = (_tty.c_iflag & ICRNL) != 0;
 223 }