1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)wwgets.c 3.12 (Berkeley) 06/29/88"; 20 #endif /* not lint */ 21 22 #include "ww.h" 23 #include "char.h" 24 25 wwgets(buf, n, w) 26 char *buf; 27 int n; 28 register struct ww *w; 29 { 30 register char *p = buf; 31 register char c; 32 char uc = w->ww_unctrl; 33 34 w->ww_unctrl = 0; 35 for (;;) { 36 wwcurtowin(w); 37 while ((c = wwgetc()) < 0) 38 wwiomux(); 39 if (c == wwoldtty.ww_sgttyb.sg_erase) { 40 if (p > buf) 41 rub(*--p, w); 42 } else if (c == wwoldtty.ww_sgttyb.sg_kill) { 43 while (p > buf) 44 rub(*--p, w); 45 } else if (c == wwoldtty.ww_ltchars.t_werasc) { 46 while (--p >= buf && (*p == ' ' || *p == '\t')) 47 rub(*p, w); 48 while (p >= buf && *p != ' ' && *p != '\t') 49 rub(*p--, w); 50 p++; 51 } else if (c == '\r' || c == '\n') { 52 break; 53 } else { 54 if (p >= buf + n - 1) 55 wwputc(ctrl('g'), w); 56 else 57 wwputs(unctrl(*p++ = c), w); 58 } 59 } 60 *p = 0; 61 w->ww_unctrl = uc; 62 } 63 64 static 65 rub(c, w) 66 struct ww *w; 67 { 68 register i; 69 70 for (i = strlen(unctrl(c)); --i >= 0;) 71 (void) wwwrite(w, "\b \b", 3); 72 } 73