76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/*
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* Copyright (c) 2023 DTB <trinity@trinity.moe>
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* Copyright (c) 2023 Marceline Cramer <mars@tebibyte.media>
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see https://www.gnu.org/licenses/.
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*/
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#include <ctype.h>
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#include <stddef.h> /* NULL */
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#include <stdio.h> /* fprintf(3) */
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#include <stdlib.h> /* EXIT_FAILURE */
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#include <string.h> /* strcmp(3) */
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#include <sysexits.h>
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static char *program_name = "str";
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static struct {
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char *name;
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int (*f)(int);
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}ctypes[] = {
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{ "isalnum", isalnum },
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{ "isalpha", isalpha },
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{ "isblank", isblank },
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{ "iscntrl", iscntrl },
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{ "isdigit", isdigit },
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{ "isxdigit", isxdigit },
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{ "isgraph", isgraph },
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{ "islower", islower },
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{ "isprint", isprint },
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{ "ispunct", ispunct },
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{ "isspace", isspace },
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{ "isupper", isupper }
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};
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int main(int argc, char *argv[]){
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int ctype;
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int i;
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int r;
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if(argc >= 3){
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for(ctype = 0; ctype < (sizeof ctypes) / (sizeof *ctypes);
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++ctype)
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if(strcmp(argv[1], ctypes[ctype].name) == 0)
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goto pass;
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}
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fprintf(stderr, "Usage: %s [type] [string...]\n",
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argv[0] == NULL ? program_name : argv[0]);
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return EX_USAGE;
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pass: for(argv += 2, r = 1; *argv != NULL; ++argv)
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for(i = 0; argv[0][i] != '\0'; ++i)
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/* First checks if argv[0][i] is valid ASCII; ctypes(3)
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* don't handle non-ASCII.
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* This is bad. */
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if((unsigned char)argv[0][i] < 0x80 && !ctypes[ctype].f(argv[0][i]))
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return 1;
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else
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r = 0;
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return r;
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}
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