getpar.c revision 1.10 1 /* $NetBSD: getpar.c,v 1.10 2002/10/18 14:12:14 itojun Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. 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 <sys/cdefs.h>
37 #ifndef lint
38 #if 0
39 static char sccsid[] = "@(#)getpar.c 8.1 (Berkeley) 5/31/93";
40 #else
41 __RCSID("$NetBSD: getpar.c,v 1.10 2002/10/18 14:12:14 itojun Exp $");
42 #endif
43 #endif /* not lint */
44
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include "getpar.h"
49 #include "trek.h"
50
51 static int testterm __P((void));
52
53 /**
54 ** get integer parameter
55 **/
56
57 int
58 getintpar(s)
59 const char *s;
60 {
61 int i;
62 int n;
63
64 while (1)
65 {
66 if (testnl() && s)
67 printf("%s: ", s);
68 i = scanf("%d", &n);
69 if (i < 0)
70 exit(1);
71 if (i > 0 && testterm())
72 return (n);
73 printf("invalid input; please enter an integer\n");
74 skiptonl(0);
75 }
76 }
77
78 /**
79 ** get floating parameter
80 **/
81
82 double getfltpar(s)
83 const char *s;
84 {
85 int i;
86 double d;
87
88 while (1)
89 {
90 if (testnl() && s)
91 printf("%s: ", s);
92 i = scanf("%lf", &d);
93 if (i < 0)
94 exit(1);
95 if (i > 0 && testterm())
96 return (d);
97 printf("invalid input; please enter a double\n");
98 skiptonl(0);
99 }
100 }
101
102 /**
103 ** get yes/no parameter
104 **/
105
106 const struct cvntab Yntab[] =
107 {
108 { "y", "es", (cmdfun)1, 1 },
109 { "n", "o", (cmdfun)0, 0 },
110 { NULL, NULL, NULL, 0 }
111 };
112
113 int
114 getynpar(s)
115 const char *s;
116 {
117 const struct cvntab *r;
118
119 r = getcodpar(s, Yntab);
120 return r->value2;
121 }
122
123
124 /**
125 ** get coded parameter
126 **/
127
128 const struct cvntab *getcodpar(s, tab)
129 const char *s;
130 const struct cvntab tab[];
131 {
132 char input[100];
133 const struct cvntab *r;
134 int flag;
135 const char *p, *q;
136 int c;
137 int f;
138
139 flag = 0;
140 while (1)
141 {
142 flag |= (f = testnl());
143 if (flag)
144 printf("%s: ", s);
145 if (f)
146 cgetc(0); /* throw out the newline */
147 scanf("%*[ \t;]");
148 if ((c = scanf("%99[^ \t;\n]", input)) < 0)
149 exit(1);
150 if (c == 0)
151 continue;
152 flag = 1;
153
154 /* if command list, print four per line */
155 if (input[0] == '?' && input[1] == 0)
156 {
157 c = 4;
158 for (r = tab; r->abrev; r++)
159 {
160 strcpy(input, r->abrev);
161 strcat(input, r->full);
162 printf("%14.14s", input);
163 if (--c > 0)
164 continue;
165 c = 4;
166 printf("\n");
167 }
168 if (c != 4)
169 printf("\n");
170 continue;
171 }
172
173 /* search for in table */
174 for (r = tab; r->abrev; r++)
175 {
176 p = input;
177 for (q = r->abrev; *q; q++)
178 if (*p++ != *q)
179 break;
180 if (!*q)
181 {
182 for (q = r->full; *p && *q; q++, p++)
183 if (*p != *q)
184 break;
185 if (!*p || !*q)
186 break;
187 }
188 }
189
190 /* check for not found */
191 if (!r->abrev)
192 {
193 printf("invalid input; ? for valid inputs\n");
194 skiptonl(0);
195 }
196 else
197 return (r);
198 }
199 }
200
201
202 /**
203 ** get string parameter
204 **/
205
206 void
207 getstrpar(s, r, l, t)
208 const char *s;
209 char *r;
210 int l;
211 const char *t;
212 {
213 int i;
214 char format[20];
215 int f;
216
217 if (t == 0)
218 t = " \t\n;";
219 (void)sprintf(format, "%%%d[^%s]", l, t);
220 while (1)
221 {
222 if ((f = testnl()) && s)
223 printf("%s: ", s);
224 if (f)
225 cgetc(0);
226 scanf("%*[\t ;]");
227 i = scanf(format, r);
228 if (i < 0)
229 exit(1);
230 if (i != 0)
231 return;
232 }
233 }
234
235
236 /**
237 ** test if newline is next valid character
238 **/
239
240 int
241 testnl()
242 {
243 char c;
244
245 while ((c = cgetc(0)) != '\n')
246 if ((c >= '0' && c <= '9') || c == '.' || c == '!' ||
247 (c >= 'A' && c <= 'Z') ||
248 (c >= 'a' && c <= 'z') || c == '-')
249 {
250 ungetc(c, stdin);
251 return(0);
252 }
253 ungetc(c, stdin);
254 return (1);
255 }
256
257
258 /**
259 ** scan for newline
260 **/
261
262 void
263 skiptonl(c)
264 int c;
265 {
266 while (c != '\n')
267 if (!(c = cgetc(0)))
268 return;
269 ungetc('\n', stdin);
270 return;
271 }
272
273
274 /**
275 ** test for valid terminator
276 **/
277
278 static int
279 testterm()
280 {
281 char c;
282
283 if (!(c = cgetc(0)))
284 return (1);
285 if (c == '.')
286 return (0);
287 if (c == '\n' || c == ';')
288 ungetc(c, stdin);
289 return (1);
290 }
291
292
293 /*
294 ** TEST FOR SPECIFIED DELIMITER
295 **
296 ** The standard input is scanned for the parameter. If found,
297 ** it is thrown away and non-zero is returned. If not found,
298 ** zero is returned.
299 */
300
301 int
302 readdelim(d)
303 char d;
304 {
305 char c;
306
307 while ((c = cgetc(0)) != '\0')
308 {
309 if (c == d)
310 return (1);
311 if (c == ' ')
312 continue;
313 ungetc(c, stdin);
314 break;
315 }
316 return (0);
317 }
318