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| -rw-r--r-- | sort.c | 132 |
1 files changed, 132 insertions, 0 deletions
@@ -0,0 +1,132 @@ +/* + * UNG's Not GNU + * + * Copyright (c) 2020, Jakob Kaivo <jkk@ung.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#define _XOPEN_SOURCE 700 +#include <errno.h> +#include <limits.h> +#include <locale.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#ifndef LINE_MAX +#define LINE_MAX _POSIX_LINE_MAX +#endif + +static int sort_check(const char *input, char sep, const char *key, unsigned int flags) +{ + (void)sep; + (void)key; + + char prev[LINE_MAX] = ""; + char cur[LINE_MAX] = ""; + uintmax_t line = 1; + + FILE *in = stdin; + if (strcmp(input, "-")) { + in = fopen(input, "r"); + } + if (in == NULL) { + fprintf(stderr, "sort: %s: %s\n", input, strerror(errno)); + } + + while (fgets(cur, sizeof(cur), in) != NULL) { + if (strcoll(cur, prev) < 0) { + fprintf(stderr, "sort: %s: disorder at line %ju\n", + input, line); + return 1; + } + + strcpy(prev, cur); + line++; + } + + fclose(in); + + return 0; +} + +int main(int argc, char *argv[]) +{ + setlocale(LC_ALL, ""); + + char *output = "-"; + enum { SORT, MERGE, CHECK } mode = SORT; + char separator = '\0'; + char *key = NULL; + unsigned int flags = 0; + + /* TODO: handle + prefixed options */ + + int c; + while ((c = getopt(argc, argv, "mcCo:t:k:bdfinru")) != -1) { + switch (c) { + case 'm': + mode = MERGE; + break; + + case 'C': + /* disable warning */ + /* FALLTHROUGH */ + case 'c': + mode = CHECK; + break; + + case 'o': + output = optarg; + break; + + case 't': + separator = *optarg; + break; + + case 'k': + key = optarg; + break; + + case 'b': + case 'd': + case 'f': + case 'i': + case 'n': + case 'r': + case 'u': + break; + + default: + return 1; + } + } + + if (mode == CHECK) { + return sort_check(argv[optind], separator, key, flags); + } + + /* add lines from all inputs */ + /* sort */ + /* print */ + + return 0; +} |