80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* Copyright (c) 2021 Dylan Lom <djl@dylanlom.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <strings.h>
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#include "util.h"
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const char *argv0;
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/*
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* Display msg, and prompt user for choice from opts.
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* Returns index of chosen opt.
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*
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* First option (opts[0]) is default if nothing else matches
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* Comparison is case insensitive
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*/
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int
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confirm(const char *msg, const char **opts, int opts_count)
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{
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if (opts_count < 2) return 0;
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char *opt0 = str_dupe(opts[0], sizeof(opts[0]));
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printf("%s [%s", msg, str_toupper(opt0, strlen(opt0)));
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free(opt0);
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for (int i = 1; i < opts_count; i++) {
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printf("/%s", opts[i]);
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}
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printf("]: ");
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char *resp = NULL;
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size_t n = 0;
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getline(&resp, &n, stdin);
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str_trimr(resp, '\n', 1);
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for (int i = 0; i < opts_count; i++) {
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if (strncasecmp(opts[i], resp, n) == 0) return i;
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}
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return 0;
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}
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/*
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* Get user confirmation
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* Examples:
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* $ confirm
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* $ confirm "Exit?"
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* $ confirm "Download file?" n y
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* $ confirm "What color?" red yellow blue
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*/
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int
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main(int argc, const char *argv[])
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{
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SET_ARGV0();
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// Options provided as args
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if (argc > 1) return confirm(argv[0], argv+1, argc-1);
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// Options not provided -- use defaults
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const char **opts = STR_EALLOC(2);
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opts[0] = "y";
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opts[1] = "n";
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return confirm(argc == 1 ? argv[0] : "Are you sure?", opts, 2);
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}
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