pc-hack

PC HACK 3.61 source code (archival)
git clone http://frotz.net/git/pc-hack.git
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tty.c (3840B)

      1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
      2 /* tty.c - version 1.0.3 */
      3 /* With thanks to the people who sent code for SYSV - hpscdi!jon,
      4    arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */
      5 
      6 #include <stdio.h>
      7 #include "hack.h"
      8 
      9 static char erase_char, kill_char;
     10 
     11 /*
     12  * Get initial state of terminal, set ospeed (for termcap routines)
     13  * and switch off tab expansion if necessary.
     14  * Called by startup() in termcap.c and after returning from ! or ^Z
     15  */
     16 gettty(){
     17 	erase_char = '\b';
     18 	kill_char = 21;		/* cntl-U */
     19 	flags.cbreak = TRUE;
     20 #ifdef DGK
     21 	disable_ctrlP();	/* turn off ^P processing */
     22 #endif
     23 }
     24 
     25 /* reset terminal to original state */
     26 settty(s) char *s; {
     27 	end_screen();
     28 	if(s) printf(s);
     29 	(void) fflush(stdout);
     30 #ifdef DGK
     31 	enable_ctrlP();		/* turn on ^P processing */
     32 #endif
     33 }
     34 
     35 
     36 /* fatal error */
     37 /*VARARGS1*/
     38 error(s,x,y) char *s; {
     39 	end_screen();
     40 	putchar('\n');
     41 	printf(s,x,y);
     42 	putchar('\n');
     43 	exit(1);
     44 }
     45 
     46 /*
     47  * Read a line closed with '\n' into the array char bufp[BUFSZ].
     48  * (The '\n' is not stored. The string is closed with a '\0'.)
     49  * Reading can be interrupted by an escape ('\033') - now the
     50  * resulting string is "\033".
     51  */
     52 getlin(bufp)
     53 register char *bufp;
     54 {
     55 	register char *obufp = bufp;
     56 	register int c;
     57 
     58 	flags.toplin = 2;		/* nonempty, no --More-- required */
     59 	for(;;) {
     60 		(void) fflush(stdout);
     61 		if((c = getchar()) == EOF) {
     62 			*bufp = 0;
     63 			return;
     64 		}
     65 		if(c == '\033') {
     66 			*obufp = c;
     67 			obufp[1] = 0;
     68 			return;
     69 		}
     70 		if(c == erase_char || c == '\b') {
     71 			if(bufp != obufp) {
     72 				bufp--;
     73 				putstr("\b \b"); /* putsym converts \b */
     74 			} else	bell();
     75 		} else if(c == '\n') {
     76 			*bufp = 0;
     77 			return;
     78 		} else if(' ' <= c && c < '\177') {
     79 				/* avoid isprint() - some people don't have it
     80 				   ' ' is not always a printing char */
     81 			*bufp = c;
     82 			bufp[1] = 0;
     83 			putstr(bufp);
     84 			if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
     85 				bufp++;
     86 		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
     87 				/* this test last - @ might be the kill_char */
     88 			while(bufp != obufp) {
     89 				bufp--;
     90 				putstr("\b \b");
     91 			}
     92 		} else
     93 			bell();
     94 	}
     95 }
     96 
     97 getret() {
     98 	cgetret("");
     99 }
    100 
    101 cgetret(s)
    102 register char *s;
    103 {
    104 	putsym('\n');
    105 	if(flags.standout)
    106 		standoutbeg();
    107 	putstr("Hit ");
    108 	putstr(flags.cbreak ? "space" : "return");
    109 	putstr(" to continue: ");
    110 	if(flags.standout)
    111 		standoutend();
    112 	xwaitforspace(s);
    113 }
    114 
    115 char morc;	/* tell the outside world what char he used */
    116 
    117 xwaitforspace(s)
    118 register char *s;	/* chars allowed besides space or return */
    119 {
    120 register int c;
    121 
    122 	morc = 0;
    123 	while((c = readchar()) != '\n') {
    124 	    if(flags.cbreak) {
    125 		if(c == ' ') break;
    126 		if(s && index(s,c)) {
    127 			morc = c;
    128 			break;
    129 		}
    130 		bell();
    131 	    }
    132 	}
    133 }
    134 
    135 static int last_multi;
    136 
    137 char *
    138 parse()
    139 {
    140 	static char inline[COLNO];
    141 	register foo;
    142 
    143 	flags.move = 1;
    144 	if(!Invisible) curs_on_u(); else home();
    145 	multi = 0;
    146 #ifdef DGK
    147 	while((foo = readchar()) >= '0' && foo <= '9') {
    148 		multi = 10*multi+foo-'0';
    149 		if (multi < 0 || multi > LARGEST_INT)
    150 			multi = LARGEST_INT;
    151 		if (multi > 9) {
    152 			remember_topl();
    153 			home();
    154 			cl_end();
    155 			printf("Count: %d", multi);
    156 		}
    157 		last_multi = multi;
    158 	}
    159 # ifdef REDO
    160 	if (foo == DOAGAIN || in_doagain)
    161 		multi = last_multi;
    162 	else {
    163 		savech(0);	/* reset input queue */
    164 		savech(foo);
    165 	}
    166 # endif
    167 
    168 #else /* DGK */
    169 
    170 	while((foo = readchar()) >= '0' && foo <= '9')
    171 		multi = 10*multi+foo-'0';
    172 
    173 #endif /* DGK */
    174 
    175 	if(multi) {
    176 		multi--;
    177 		save_cm = inline;
    178 	}
    179 	inline[0] = foo;
    180 	inline[1] = 0;
    181 	if(foo == 'g' || foo == 'G'){
    182 		inline[1] = getchar();
    183 		savech(inline[1]);
    184 		inline[2] = 0;
    185 	}
    186 	if(foo == 'm' || foo == 'M'){
    187 		inline[1] = getchar();
    188 		savech(inline[1]);
    189 		inline[2] = 0;
    190 	}
    191 	clrlin();
    192 	return(inline);
    193 }
    194 
    195 char
    196 readchar() {
    197 	register int sym;
    198 
    199 	(void) fflush(stdout);
    200 	sym = getchar();
    201 	if(flags.toplin == 1)
    202 		flags.toplin = 2;
    203 	return((char) sym);
    204 }