84 lines
1.5 KiB
C
84 lines
1.5 KiB
C
#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#define reg register
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#define LINE 70
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static char buf[257];
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static int
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comp(s1)
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char *s1; {
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reg char *sp, *tsp, c;
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if (buf[0] != '\0')
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for (sp = buf, tsp = s1; *sp; ) {
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c = isupper(*tsp) ? tolower(*tsp) : *tsp;
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tsp++;
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if (c != *sp++)
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return 0;
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}
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else if (*s1 != '\0')
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return 0;
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return 1;
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}
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int
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getinp(prompt, list)
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char *prompt, *list[]; {
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reg int i, n_match, match = 0;
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char *sp;
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for (;;) {
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inter:
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printf("%s", prompt);
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for (sp = buf; (*sp=getchar()) != '\n' && !feof(stdin); )
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if (*sp == -1) /* check for interupted system call */
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goto inter;
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else if (sp != buf || *sp != ' ')
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sp++;
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if (feof(stdin)) {
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clearerr(stdin);
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continue;
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}
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if (buf[0] == '?' && buf[1] == '\n') {
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printf("Valid inputs are: ");
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for (i = 0, match = 18; list[i]; i++) {
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if ((match+=(n_match=strlen(list[i]))) > LINE) {
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printf("\n\t");
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match = n_match + 8;
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}
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if (*list[i] == '\0') {
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match += 8;
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printf("<RETURN>");
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}
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else
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printf("%s", list[i]);
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if (list[i+1])
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printf(", ");
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else
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putchar('\n');
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match += 2;
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}
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continue;
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}
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*sp = '\0';
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for (sp = buf; *sp; sp++)
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if (isupper(*sp))
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*sp = tolower(*sp);
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for (i = n_match = 0; list[i]; i++)
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if (comp(list[i])) {
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n_match++;
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match = i;
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}
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if (n_match == 1)
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return match;
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else if (buf[0] != '\0')
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printf("Illegal response: \"%s\". Use '?' to get list of valid answers\n", buf);
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}
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}
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