1 /* @(#)wwgets.c 8.1 (Berkeley) 6/6/93 */ 2 /* $NetBSD: wwgets.c,v 1.9 2003/08/07 11:17:40 agc Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Edward Wang at The University of California, Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <string.h> 37 #include "ww.h" 38 #include "char.h" 39 40 static void rub(int, struct ww *); 41 42 void 43 wwgets(char *buf, int n, struct ww *w) 44 { 45 char *p = buf; 46 int c; 47 int uc = ISSET(w->ww_wflags, WWW_UNCTRL); 48 49 CLR(w->ww_wflags, WWW_UNCTRL); 50 for (;;) { 51 wwcurtowin(w); 52 while ((c = wwgetc()) < 0) 53 wwiomux(); 54 #ifdef OLD_TTY 55 if (c == wwoldtty.ww_sgttyb.sg_erase) 56 #else 57 if (c == wwoldtty.ww_termios.c_cc[VERASE]) 58 #endif 59 { 60 if (p > buf) 61 rub(*--p, w); 62 } else 63 #ifdef OLD_TTY 64 if (c == wwoldtty.ww_sgttyb.sg_kill) 65 #else 66 if (c == wwoldtty.ww_termios.c_cc[VKILL]) 67 #endif 68 { 69 while (p > buf) 70 rub(*--p, w); 71 } else 72 #ifdef OLD_TTY 73 if (c == wwoldtty.ww_ltchars.t_werasc) 74 #else 75 if (c == wwoldtty.ww_termios.c_cc[VWERASE]) 76 #endif 77 { 78 while (--p >= buf && (*p == ' ' || *p == '\t')) 79 rub(*p, w); 80 while (p >= buf && *p != ' ' && *p != '\t') 81 rub(*p--, w); 82 p++; 83 } else if (c == '\r' || c == '\n') { 84 break; 85 } else { 86 if (p >= buf + n - 1) 87 wwputc(ctrl('g'), w); 88 else 89 wwputs(unctrl(*p++ = c), w); 90 } 91 } 92 *p = 0; 93 SET(w->ww_wflags, uc); 94 } 95 96 static void 97 rub(int c, struct ww *w) 98 { 99 int i; 100 101 for (i = strlen(unctrl(c)); --i >= 0;) 102 (void) wwwrite(w, "\b \b", 3); 103 } 104