From 1b6e1bf052a159865ead2aaa5ef0c51992938f2e Mon Sep 17 00:00:00 2001
From: Daniel Ryzhuk <daniel.ryzhuk@student.tuke.sk>
Date: Sun, 24 Jan 2021 18:33:07 +0000
Subject: [PATCH] Add 'sk4/program.c'

---
 sk4/program.c | 172 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 sk4/program.c

diff --git a/sk4/program.c b/sk4/program.c
new file mode 100644
index 0000000..34d0bff
--- /dev/null
+++ b/sk4/program.c
@@ -0,0 +1,172 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+enum action {TUK, INK, DEK, BREK, GLEK, PUK, KUK, op, cl, FUK};
+
+
+void run_tukafuk(const char* code);
+int convert_code(enum action* commands, const char* code);
+void run_code(enum action*  commands, int size);
+
+int main(int argc, char* argv[]){
+
+    if(argc < 2){
+        printf("Please provide file with source code\n");
+        return 0;
+    }
+
+    char commands[999999];
+
+    FILE* file = fopen(argv[1], "r");
+    fread(commands, 1, 999999, file);
+
+    run_tukafuk(commands);
+}
+
+void run_tukafuk(const char* code){
+    enum action *commands = calloc(999999, sizeof(enum action));
+    int pos = 0;
+
+    int size = convert_code(commands, code);
+
+    run_code(commands, size);
+}
+
+void run_code(enum action*  commands, int size){
+    char memory[1000] = {0};
+    int pos = 0;
+
+    int ended = 0;
+
+    for(int i = 0; i < size; i++){
+        if(commands[i] == INK){
+            memory[pos] += 1;
+        }
+        else if(commands[i] == DEK){
+            memory[pos] -= 1;
+        }
+        else if(commands[i] == BREK){
+            pos++;
+        }
+        else if(commands[i] == GLEK){
+            pos--;
+        }
+        else if(commands[i] == PUK){
+            putchar(memory[pos]);
+        }
+        else if(commands[i] == KUK){
+            memory[pos] = getchar();
+        }
+        else if(commands[i] == op && memory[pos] == 0){
+            int closed = 1;
+            while(closed > 0){
+                i++;
+                if(commands[i] == op){
+                    closed++;
+                }
+                else if(commands[i] == cl){
+                    closed--;
+                }
+                if(i > size){
+                    printf("Error with opening bracket!\n");
+                    exit(1);
+                }
+            }
+        }
+        else if(commands[i] == cl && memory[pos] != 0){
+            int opened = 1;
+            while(opened > 0){
+                i--;
+                if(commands[i] == cl){
+                    opened++;
+                }
+                else if(commands[i] == op){
+                    opened--;
+                }
+                if(i < 0){
+                    printf("Error with opening bracket!\n");
+                    exit(1);
+                }
+            }
+        }
+        else if(commands[i] == FUK){
+            ended = 1;
+            break;
+        }
+    }
+
+    if(!ended){
+        printf("No FUK at the end :(\n");
+    }
+}
+
+int convert_code(enum action* commands, const char* code){
+    int pos = 0;
+    int offset = 0;
+    int add_offset = 0;
+    char buff[100];
+
+    int size = strlen(code);
+
+    while(1){
+        int res = sscanf(code + offset ,"%s%n", buff, &add_offset);
+        if(res == 0 || strcmp(buff, "TUK") == 0){
+            break;
+        }
+    }
+
+    while (1){
+        if(offset >= size){
+            break;
+        }
+        int res = sscanf(code + offset ,"%s%n", buff, &add_offset);
+
+        if(res == 0){
+            break;
+        }
+        offset += add_offset;
+
+        if(strcmp(buff, "TUK") == 0){
+            commands[pos] = TUK;
+        }
+        else if(strcmp(buff, "INK") == 0){
+            commands[pos] = INK;
+        }
+        else if(strcmp(buff, "DEK") == 0){
+            commands[pos] = DEK;
+        }
+        else if(strcmp(buff, "BREK") == 0){
+            commands[pos] = BREK;
+        }
+        else if(strcmp(buff, "GLEK") == 0){
+            commands[pos] = GLEK;
+        }
+        else if(strcmp(buff, "PUK") == 0){
+            commands[pos] = PUK;
+        }
+        else if(strcmp(buff, "KUK") == 0){
+            commands[pos] = KUK;
+        }
+        else if(strcmp(buff, "[") == 0){
+            commands[pos] = op;
+        }
+        else if(strcmp(buff, "]") == 0){
+            commands[pos] = cl;
+        }
+        else if(strcmp(buff, "FUK") == 0){
+            commands[pos] = FUK;
+        }
+        else if(strcmp(buff, "[") == 0){
+            commands[pos] = op;
+        }
+        else if(strcmp(buff, "]") == 0){
+            commands[pos] = cl;
+        }
+        else{
+            pos--;
+        }
+        pos++;
+    }
+    return pos;
+}