From d8f2c10b7108fff6b7e437291093a1cadc15ab9f Mon Sep 17 00:00:00 2001
From: Tyler Murphy <tylerm@tylerm.dev>
Date: Sat, 6 May 2023 00:39:44 -0400
Subject: refactor

---
 src/commands/tac.c | 117 -----------------------------------------------------
 1 file changed, 117 deletions(-)
 delete mode 100644 src/commands/tac.c

(limited to 'src/commands/tac.c')

diff --git a/src/commands/tac.c b/src/commands/tac.c
deleted file mode 100644
index d188de9..0000000
--- a/src/commands/tac.c
+++ /dev/null
@@ -1,117 +0,0 @@
-#include "../command.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <limits.h>
-
-static void help(void) {
-    printf("Usage: tac [FILE]...\n\n");
-    printf("Concatenate FILEs and print them in reverse\n");
-}
-
-static void print_range(FILE* file, int start, int end) {
-    int len, i;
-
-    len = end - start;
-    fseek(file, start, SEEK_SET);
-    
-    for (i = 0; i < len; i++) {
-        putchar(getc(file));
-    }
-    
-    fflush(stdout);
-}
-
-static char stdin_path[PATH_MAX];
-
-static FILE* read_stdin (void) {
-    static bool read;
-    static FILE* file;
-    int r;
-    char c;
-
-    if (read) goto finished;
-    read = true;
-    
-    srand(time(NULL));
-    
-    r = rand() % 1000000;
-    
-    sprintf(stdin_path, "/tmp/%d.tac", r);
-    file = get_file(stdin_path, "w");
-
-    while((c = getchar()) != EOF) putc(c, file);
-    fclose(file);
-
-    file = get_file(stdin_path, "r");
-
-finished:
-    return file;
-}
-
-static void parse_file(FILE* file, struct Stack* stack) {
-    char buf[1024], c;
-    int read, i;
-    int total = 1;
-
-    stack_push_int(stack, 0);
-    rewind(file);
-    while ((read = fread(buf, 1, 1024, file)) > 0) {
-        for (i = 0; i < read; i++) {
-            c = buf[i];
-            if (c != '\n') continue;
-            stack_push_int(stack, total + i);
-        }
-        total += read;
-    }
-}
-
-static void tac_file(FILE* file) {
-    struct Stack stack;
-    int last, current;
-    
-    stack_init(&stack, 80);
-    parse_file(file, &stack);
-    rewind(file);
-
-    if (!stack_pop_int(&stack, &last)) goto cleanup;
-    
-    while(stack_pop_int(&stack, &current)) {
-        print_range(file, current, last);
-        last = current;
-    }
-
-cleanup:
-
-    stack_free(&stack);
-}
-
-COMMAND(tac) {
-
-    FILE* in;
-    int i;
-
-    parse_help(argc, argv, help);
-
-    in = read_stdin();
-
-    if (argc < 1) {
-        tac_file(in);
-        return EXIT_SUCCESS;
-    }
-
-    for (i = 0; i < argc; i++) {
-        FILE* file = get_file(argv[i], "r");
-        if (file == stdin) {
-            tac_file(in);
-        } else {
-            tac_file(file);
-            fclose(file);
-        }
-    }
-
-    fclose(in);
-    remove(stdin_path);
-
-    return EXIT_SUCCESS;
-}
-- 
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