finish 06, time to get a real Makefile

.gitignore

@@ -1 +1,3 @@
 a.out
+build/
+*.o

06/_.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+#include <strings.h>
+#include <wctype.h>
+#include <math.h>
+
+#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
+#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#define ABS(X) ((X) >= 0 ? (X) : -(X))
+
+char** str_split(char* a_str, const char a_delim);
+
+int str_index(char *str, char c);
+
+int number_of_element(char *str, char c);
+
+long gmc(long a, long b);
+long lmc(long a, long b);
+long lmcs(int array[], int n);
+
+long strslen(char **strs);

06/main.txt

@@ -0,0 +1,130 @@
+......#........#..........#.................##......................#.............#..................#............#............#..
+.....#............................................#.......................#.......##.................#..#...................#.#...
+......#...................#............................#.....#.........#................................................#.........
+...........................................#.......#..........#..#......#.........#.#.#.#................#.##........##...........
+........#.........................................#.......#.....#..........#...#....##....#..#.......##................#......#...
+...................#..#.....................................................#.................................................#...
+....#..................#..........#........#.............#................................................................#.......
+......#..............#..................#...........#......#.....#...........................#..#.#.....................#.....#...
+......#...#...............................................#.....#.........................#..........#............................
+......#......#..........................................#..................................#....#..#................#..##...#.....
+........................................................................................#.........................................
+................#..........#..........................#.##......................#..........#......................................
+.............#.............................#......#..............................#....................#...........#.....#...#.....
+.......#.................#..................#..........................#...........................................#..............
+.......#.....................................................#..........................................#....#.#.....#......#.....
+...#......#............#........#......................#...........................#.#....#..#....................#.............##
+...........................##..#..#..........#....................#................................................#......#.......
+.....................#...#.......................#...#..#.....#................#...........................................#....#.
+.................#................#.............#...#...........................................................#..#.#............
+#.....................#....................##.......#...................#..........#..........................#...................
+.#..........##......#...#......#................#.....................................#.#.....#..............#....................
+...#...#..#..........................................................#..#..#......................................................
+..................#.#..............#...#...............................#...#....#.#.........#.........................##..........
+.......#.........................#..............................................#........#....#....#.........#....................
+...........#......#......#...........#........#.............................##.................................................#..
+............................#...................................#......#........................................#.................
+......................................##...........................................#.............#..#...........#...#.....#.......
+...................................................#.................................#............................................
+..........................#..........................................#..#.....#.................#.#......#........................
+..................#...........#.............................#....#.#..................#................................#..........
+...................#....#..#.........................................................#....#.......................................
+..#..........................................................##..................................#......................#....#.#..
+#.........................#.....#...............................#........................#................#.......................
+......................#......#...#..........#......#..............................#...#......#.................................#..
+...............#.....#............................................................................#...............................
+#.....................#........#.#........................................................#.......................#.............#.
+.......#...#..........#........#...........#.................#..................#....................................##.....#.....
+.#......#..................................#.......................................................................#..............
+.................#.....#...........................................................#..............................................
+.........#....................................^......#..................#..............................#..#.............#...#.....
+.............................................................#.....#....................................#.........................
+....................#.................#........#........................................................#..#............#........#
+.....#..........................................................#...........................#.................#....##.............
+..............#.........#.................#............................#.............#......................#.#............#......
+.............#.................#.........................................#...#................#.............#.....#...............
+....#.....##..#......#........#............................................#..........#.......#.................................##
+..........................................................................#.......................................................
+.......#..........#.............................................................................................##..#.............
+............................#...............#...............................................................................#.....
+....#......#...............................................................................................................#......
+..................................#......................#.....#............................................#.....#........#......
+...............................#..........................................#.......................................................
+.....#.............#...#..............#.#............#....................................................................#.......
+..............................................#...............................#......##.......#................#..........#.#.....
+........#.....##...............................................#.........................#........................................
+.....#.........................#.#........#.............................................#.............#..............##...........
+........................................#..##.........................#............#...........#.............#....................
+.....................#.#................#............................#.................#.....#..............................#.....
+................#.....................................#..#....................#..................................#................
+...........#...................#.................#..........................................................#.......#...........#.
+...........................#..................................#......#..............#............#.........#....#................#
+..................................................................................................................#...............
+..............#....#.#............................................................................#.....#.........#........#......
+..#...........#.................#.#......#................................#..........................#...........................#
+............#...........##...............................#..................................................#.....................
+..............##.#..................................................................................#.........#......#......#.....
+................................................................#...............#....#....##................#.....................
+.........#..#.....................#........................................................#......#................#..............
+...#..........#..........#..................#.......................#........................#...#................#.........#.....
+...................................#..#...............................#..........#................................................
+.........................#........................................................................................................
+......................#.........#....................................................##............................#.....#........
+.#....#.....................#.........................................................#....#........#.............................
+..........................................#....................................#........................................#.........
+.................................................#.......................................#........................................
+#..#...............#......................#....#.............................................#................#........##.........
+.........#....#........##.........#.....#.........#...............................................#..................#....#...#...
+..#............................................................................#...............................................#..
+.......................................................#.........#......#..........................#.#............................
+.........#.............#.................##.....#.....#.........#............#.........#..................#.....#.............#...
+#..........#.........#...............................................................................................#............
+.......................#....................#..................................................#..................................
+.#................#.................................#........................................#...........#........................
+.........#........................................................................................................................
+..................................................................................#..........#.....................#..............
+..#...............................#.......#.....................#......................#.....#..........................#.........
+......#....#..........................................................#..........................#................................
+...........................................##..................................................##..................#...#..........
+...............#....#...........................#........................................#..............#....................##...
+#......#......................................................#..........#.........................#.........#....................
+...#...................................#......#..........................................#.........................#.............#
+#.....#.........#.............#.......................................#...............................#...........................
+...................#.#..........................................................................#...............#.................
+.......#......##..........#....................................................#..................#..........#....................
+.............................................#.##..............#......................#......#..#..................#..........#...
+..##...................#...................................#.........................................#...........#................
+...................................................#.....................................#.......................#...............#
+..........#.......##...................#...............#...............................................................#..........
+.......................#............#............##.............................................#......##.................#...#...
+.........#.................................................................................#............#....................#....
+.......##.........#..................................................................#................#...........................
+................#.............................................................................................#...................
+......................#.......#....#.................................................#......#.#...............................#...
+.........#.........#.#.....##.#..................................##...................................................#...........
+.#......................................................#.......#......##........#..........#.........#....#......................
+........#.#......................#................................................................................................
+..................#.............................#.................#..................#......................#......##.#...........
+................##.............................................#....#..........##.#.#....#........................................
+..............#...................#.......#............................#.#.....................................................#..
+............#..............................................#....#.....................#...#.......................#.....#......#..
+..............#........................................................#............................................#.............
+.......#.....#.........#..............#..............................#.......................#..#................#....#..#........
+.......................#......#........................................#.................#..........#.............................
+...........#..................#.............................#............................................................#........
+......#....#......#.....................#.....................#........#.....................#...#.....#.#...................#....
+#..............................................##...#.....#...........#..........................................#................
+..........#..........#.#........................................#..#....#.........................................................
+..................#......................................#...#.......#............................................................
+...#.............................#..................................................#...........#.................................
+................................##.#.............#........................#...#...............................................#...
+...#...................................#.......................#........................#............#...............#....#.#.....
+..............................................................##.......#...............#.........#..................#.............
+....#............................#..................................#..#..#...............#..............##.......................
+#...#.................##...............................#...........#...........#..............#.#.........#........#...#..........
+..........................#.....#....................#..............#.............#..........#....................#.........#.....
+......#.......................................................#........#.....#..........................#...#.........#...........
+...............................#............#.....#...........................#...............#........#..........................
+............#..#......#...#..#.....................#...............#.........#...........................................#.....#..
+.......#..#..................#............#...........#..............................................................#............
+....#......#.##..#......##..........#.......#............#...............#....#....................................#..........#.#.

06/mylib.c

@@ -0,0 +1,91 @@
+#include "_.h"
+
+// NOT MY CODE
+// https://stackoverflow.com/questions/9210528/split-string-with-delimiters-in-c
+char** str_split(char* str, const char a_delim)
+{
+	char *a_str = strdup(str);
+    char** result    = 0;
+    size_t count     = 0;
+    char* tmp        = a_str;
+    char* last_comma = 0;
+    char delim[2];
+    delim[0] = a_delim;
+    delim[1] = 0;
+
+    while (*tmp)
+    {
+        if (a_delim == *tmp)
+        {
+            count++;
+            last_comma = tmp;
+        }
+        tmp++;
+    }
+
+    count += last_comma < (a_str + strlen(a_str) - 1);
+
+    count++;
+
+    result = malloc(sizeof(char*) * count);
+
+    if (result)
+    {
+        size_t idx  = 0;
+        char* token = strtok(a_str, delim);
+
+        while (token)
+        {
+            //assert(idx < count);
+            *(result + idx++) = strdup(token);
+            token = strtok(0, delim);
+        }
+        //assert(idx == count - 1);
+        *(result + idx) = 0;
+    }
+
+	free(a_str);
+    return result;
+}
+
+int str_index(char *str, char c) {
+
+    int i = 0;
+    while (str[i])
+        if (str[i++] == c)
+            return i;
+
+    return -1;
+}
+
+int number_of_element(char *str, char c) {
+	int nbr = 0;
+	for (int i = 0; str[i] != '\0'; i++)
+        if (str[i] == c)
+            nbr++;
+    return nbr;
+}
+
+long gmc(long a, long b) {
+    if (b == 0)
+        return a;
+    return gmc(b, a % b);
+}
+
+long lmc(long a, long b) {
+    return (a / gmc(a, b)) * b;
+}
+
+long lmcs(int array[], int n) {
+    long result = array[0];
+    for (int i = 1; i < n; i++)
+        result = lmc(result, array[i]);
+    return result;
+}
+
+long strslen(char **strs) {
+    long count = 0;
+    while (strs[count])
+        count++;
+    return count;
+}

06/part1.c

@@ -0,0 +1,72 @@
+#include "_.h"
+
+int main(int argc, char **argv) {
+	
+	if (argc != 2)
+		return 1;
+
+	char *input = argv[1];
+	char **inputs = str_split(strdup(input), '\n');
+
+    int x = 0, y = 0;
+	for (int i = 0; inputs[i] != NULL; i++)
+        for (int j = 0; inputs[i][j] != '\0'; j++)
+            if (inputs[i][j] == '^') {
+                y = i;
+                x = j;
+            }
+    
+    int direction = 0; // 0 = top; 1 = right; 2 = down; 3 = left
+    while (1) {
+        if (direction == 0) {
+            if (inputs[y - 1] == NULL)
+                break;
+            if (inputs[y - 1][x] == '#')
+                direction++;
+            else {
+                inputs[y][x] = 'X';
+                y--;
+            }
+        }
+        else if (direction == 1) {
+            if (x + 1 >= strlen(inputs[y]))
+                break;
+            if (inputs[y][x + 1] == '#')
+                direction++;
+            else {
+                inputs[y][x] = 'X';
+                x++;
+            }
+        }
+        else if (direction == 2) {
+            if (inputs[y + 1] == NULL)
+                break;
+            if (inputs[y + 1][x] == '#')
+                direction++;
+            else {
+                inputs[y][x] = 'X';
+                y++;
+            }
+        }
+        else if (direction == 3) {
+            if (x - 1 < 0)
+                break;
+            if (inputs[y][x - 1] == '#')
+                direction = 0;
+            else {
+                inputs[y][x] = 'X';
+                x--;
+            }
+        }
+    }
+
+    int count = 1;
+	for (int i = 0; inputs[i] != NULL; i++)
+        for (int j = 0; inputs[i][j] != '\0'; j++)
+            if (inputs[i][j] == 'X')
+                count++;
+
+    printf("count: %d\n", count);
+
+	return 0;
+}

06/part2.c

@@ -0,0 +1,78 @@
+#include "_.h"
+
+int its_infinite(char **inputs, int x, int y) {
+
+    int i = 0;
+    int direction = 0; // 0 = top; 1 = right; 2 = down; 3 = left
+    for (; i < 100000; i++) {
+        if (direction == 0) {
+            if (y - 1 < 0)
+                return 0;
+            if (inputs[y - 1][x] == '#')
+                direction++;
+            else
+                y--;
+        }
+        else if (direction == 1) {
+            if (x + 1 >= strlen(inputs[y]))
+                return 0;
+            if (inputs[y][x + 1] == '#')
+                direction++;
+            else
+                x++;
+        }
+        else if (direction == 2) {
+            if (inputs[y + 1] == NULL)
+                return 0;
+            if (inputs[y + 1][x] == '#')
+                direction++;
+            else
+                y++;
+        }
+        else if (direction == 3) {
+            if (x - 1 < 0)
+                return 0;
+            if (inputs[y][x - 1] == '#')
+                direction = 0;
+            else
+                x--;
+        }
+    }
+
+    return 1;
+}
+
+int main(int argc, char **argv) {
+	
+	if (argc != 2)
+		return 1;
+
+	char *input = argv[1];
+	char **inputs = str_split(strdup(input), '\n');
+
+    int x = 0, y = 0;
+	for (int i = 0; inputs[i] != NULL; i++)
+        for (int j = 0; inputs[i][j] != '\0'; j++)
+            if (inputs[i][j] == '^') {
+                y = i;
+                x = j;
+            }
+    
+    int count = 0;
+	for (int i = 0; inputs[i] != NULL; i++) {
+        for (int j = 0; inputs[i][j] != '\0'; j++) {
+            int replace = 0;
+            if (inputs[i][j] == '#')
+                replace = 1;
+            inputs[i][j] = '#';
+            count += its_infinite(inputs, x, y);
+            inputs[i][j] = '.';
+            if (replace)
+                inputs[i][j] = '#';
+        }
+    }
+
+    printf("count: %d\n", count);
+
+	return 0;
+}

06/test.txt

@@ -0,0 +1,10 @@
+....#.....
+.........#
+..........
+..#.......
+.......#..
+..........
+.#..^.....
+........#.
+#.........
+......#...

template/Makefile

@@ -0,0 +1,41 @@
+CC 		:= gcc
+LD      := $(CC)
+LIBS 	:= -lm
+LDFLAGS :=
+CFLAGS  := -Wall -Wextra -Wno-override-init -std=c2x -include_.h
+SRC     := part1.c mylib.c
+ifeq ($(PART),2)
+    SRC  := part2.c mylib.c
+endif
+OBJ_DIR := build
+OBJ     := $(addprefix $(OBJ_DIR)/, $(patsubst %.c,%.o,$(SRC)))
+DIR 	:= .
+RAW_NAME:= a.out
+NAME    := $(RAW_NAME)
+
+ifeq ($(RELEASE),1)
+    CFLAGS += -O3
+    LDFLAGS += -O3 -s
+else
+    CFLAGS += -O0 -g3
+    LDFLAGS += -O0 -g
+endif
+
+all: $(NAME)
+
+$(NAME): $(OBJ)
+	$(LD) $(LDFLAGS) -o $(DIR)/$(NAME) $(OBJ) $(LIBS)
+
+$(OBJ_DIR)/%.o: %.c
+	@mkdir -p $(@D)
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	@rm -rf $(OBJ_DIR)
+	@rm -rf $(RAW_NAME)
+
+re:
+	@make --no-print clean
+	@make --no-print all
+
+.PHONY: all clean re

template/part2.c

@@ -0,0 +1,16 @@
+#include "_.h"
+
+int main(int argc, char **argv) {
+	
+	if (argc != 2)
+		return 1;
+
+	char *input = argv[1];
+	char **inputs = str_split(strdup(input), '\n');
+
+	for (int i = 0; inputs[i] != NULL; i++) {
+
+	}
+
+	return 0;
+}