From c40f79737a4ce6ae0cd8bd6ea7f302217333e486 Mon Sep 17 00:00:00 2001
From: Charles Cabergs <me@cacharle.xyz>
Date: Sat, 22 Aug 2020 19:43:03 +0200
Subject: Added Makefile

---
 shuf.c | 237 -----------------------------------------------------------------
 1 file changed, 237 deletions(-)
 delete mode 100644 shuf.c

(limited to 'shuf.c')

diff --git a/shuf.c b/shuf.c
deleted file mode 100644
index 5b4808a..0000000
--- a/shuf.c
+++ /dev/null
@@ -1,237 +0,0 @@
-#define _POSIX_C_SOURCE 200809L
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <string.h>
-#include <errno.h>
-#include <limits.h>
-
-#define NUMBER_LEN(x) strlen(#x);
-
-static char *g_name = "shuf";
-
-void fatal(const char *format, ...)
-{
-	va_list	ap;
-
-	va_start(ap, format);
-	fprintf(stderr, "%s: ", g_name);
-	vfprintf(stderr, format, ap);
-	fputc('\n', stderr);
-	va_end(ap);
-	exit(EXIT_FAILURE);
-}
-
-long parse_ulong(char *str, char *error_msg)
-{
-	char *end;
-	long ret;
-
-	errno = 0;
-	ret = strtol(str, &end, 10);
-	if (errno != 0 || ret < 0 || *end != '\0')
-		fatal("%s '%s'", error_msg, optarg);
-	return ret;
-}
-
-typedef struct
-{
-	char **data;
-	size_t len;
-	size_t cap;
-} t_lines;
-
-#define INITIAL_CAPACITY 64
-
-void lines_init(t_lines *lines)
-{
-	lines->len = 0;
-	lines->cap = INITIAL_CAPACITY;
-	lines->data = malloc(lines->cap * sizeof(char*));
-	if (lines->data == NULL)
-		fatal("%s", strerror(errno));
-}
-
-void lines_destroy(t_lines *lines)
-{
-	for (size_t i = 0; i < lines->len; i++)
-		free(lines->data[i]);
-	free(lines->data);
-}
-
-#define GROWTH_FACTOR 2
-
-void lines_push(t_lines *lines, char *line)
-{
-	if (lines->len >= lines->cap)
-	{
-		lines->cap *= GROWTH_FACTOR;
-		lines->data = realloc(lines->data, lines->cap * sizeof(char*));
-		if (lines->data == NULL)
-			fatal("%s", strerror(errno));
-	}
-	lines->data[lines->len] = line;
-	lines->len++;
-}
-
-#define RANDOM_FILEPATH "/dev/random"
-
-int main(int argc, char **argv)
-{
-	int  option;
-	long max_output       = -1;
-	char *output_filepath = NULL;
-	bool repeat           = false;
-	bool echo             = false;
-	char delimiter        = '\n';
-	long range_start      = -1;
-	long range_stop       = -1;
-
-	while ((option = getopt(argc, argv, "ei:n:o:rz")) != -1)
-	{
-
-		switch (option)
-		{
-			case 'e': echo            = true;   break;
-			case 'r': repeat          = true;   break;
-			case 'o': output_filepath = optarg; break;
-			case 'z': delimiter       = '\0';   break;
-
-			case 'i':
-			{
-				char *hyphen = strchr(optarg, '-');
-				if (hyphen == NULL)
-					fatal("invalid input range '%s'", optarg);
-				*hyphen = '\0';
-				range_start = parse_ulong(optarg, "invalid input range");
-				*hyphen = '-';
-				range_stop  = parse_ulong(hyphen + 1, "invalid input range");
-				if (range_start > range_stop)
-					fatal("invalid input range '%s'", optarg);
-				break;
-			}
-
-			case 'n':
-				max_output = parse_ulong(optarg, "invalid line count");
-				break;
-		}
-
-	}
-	if (range_start != -1 && echo)
-		fatal("cannot combine -e and -i options");
-	if (range_start != -1 && optind != argc)
-		fatal("extra operand '%s'", argv[optind]);
-	if (!echo && argc - optind > 1)
-		fatal("extra operand '%s'", argv[optind]);
-
-	unsigned int seed;
-	FILE *seed_file = fopen(RANDOM_FILEPATH, "r");
-	if (seed_file == NULL)
-		fatal("%s: %s", RANDOM_FILEPATH, strerror(errno));
-	fread(&seed, sizeof(seed), 1, seed_file);
-	srand(seed);
-
-	t_lines lines;
-	lines_init(&lines);
-
-	if (range_start != -1)
-	{
-		size_t buf_len = NUMBER_LEN(LONG_MAX);
-		for (; range_start <= range_stop; range_start++)
-		{
-			char *line = malloc(buf_len * sizeof(char));
-			if (line == NULL)
-				fatal("%s", strerror(errno));
-			sprintf(line, "%ld", range_start);
-			lines_push(&lines, line);
-		}
-	}
-	else if (echo)
-	{
-		for (; optind < argc; optind++)
-		{
-			char *line = strdup(argv[optind]);
-			if (line == NULL)
-				fatal("%s", strerror(errno));
-			lines_push(&lines, line);
-		}
-	}
-	else
-	{
-		FILE *input = stdin;
-		if (optind != argc)
-		{
-			input = fopen(argv[optind], "r");
-			if (input == NULL)
-				fatal("%s: %s", argv[optind], strerror(errno));
-		}
-
-		char   *line     = NULL;
-		size_t line_size = 0;
-		errno = 0;
-		while (getdelim(&line, &line_size, delimiter, input) != -1)
-		{
-			lines_push(&lines, line);
-			line = NULL;
-			line_size = 0;
-		}
-		if (errno != 0)
-		{
-			fclose(input);
-			fatal("%s: %s", argv[optind], strerror(errno));
-		}
-		fclose(input);
-	}
-
-	if (lines.len == 0)
-	{
-		lines_destroy(&lines);
-		return EXIT_SUCCESS;
-	}
-	for (size_t i = lines.len - 1; i > 0; i--)
-	{
-		size_t j = rand() % i;
-		char *tmp = lines.data[i];
-		lines.data[i] = lines.data[j];
-		lines.data[j] = tmp;
-	}
-
-	FILE *output = stdout;
-	if (output_filepath != NULL)
-	{
-		output = fopen(output_filepath, "w");
-		if (output == NULL)
-			fatal("%s: %s", output_filepath, strerror(errno));
-	}
-
-	if (repeat)
-	{
-		for (size_t i = 0; true; i = (i + 1) % lines.len)
-		{
-			if (fputs(lines.data[i], output) == EOF)
-				break;
-			if (echo || range_start != -1)
-				if (fputc('\n', output) == EOF)
-					break;
-		}
-	}
-	else
-	{
-		for (size_t i = 0;
-			 max_output == -1 ? (i < lines.len) : (i < (unsigned long)max_output);
-			 i++)
-		{
-			if (fputs(lines.data[i], output) == EOF)
-				break;
-			if (echo || range_start != -1)
-				if (fputc('\n', output) == EOF)
-					break;
-		}
-	}
-	fclose(output);
-
-	lines_destroy(&lines);
-	return EXIT_SUCCESS;
-}
-- 
cgit