Finished...

.gitignore

@@ -0,0 +1 @@
+xiew

compile.sh

@@ -2,6 +2,6 @@
 
 set -xe
 
-gcc -g -ansi -Wall -Wextra -Wpedantic -Werror -o xiew xiew.c
+gcc -g -ansi -Wall -Wextra -Wpedantic -Werror -o xiew xiew.c -lm -lpng
 
 exit

xiew.c

@@ -1,8 +1,97 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
 #include <png.h>
 
+static unsigned int * image_buffer = NULL;
+static unsigned int   image_width  = 0;
+static unsigned int   image_height = 0;
+
+static void import_image (char * file_path) {
+	png_image temporary = { 0 };
+
+	temporary.version = PNG_IMAGE_VERSION;
+
+	if (png_image_begin_read_from_file (& temporary, file_path) == 0) {
+		printf ("PNG: Image init fuck up!\n");
+		exit (EXIT_FAILURE);
+	}
+
+	temporary.format = PNG_FORMAT_RGB;
+
+	image_width  = temporary.width;
+	image_height = temporary.height;
+
+	image_buffer = calloc ((size_t) (image_width * image_height), sizeof (* image_buffer));
+
+	if (png_image_finish_read (& temporary, NULL, image_buffer, 0, NULL) == 0) {
+		printf ("PNG: Image read fuck up!\n");
+		exit (EXIT_FAILURE);
+	}
+
+	png_image_free (& temporary);
+}
+
+static void export_image (char * file_path) {
+	png_image temporary = { 0 };
+
+	temporary.version = PNG_IMAGE_VERSION;
+	temporary.format  = PNG_FORMAT_RGB;
+	temporary.width   = image_width;
+	temporary.height  = image_height;
+
+	if (png_image_write_to_file (& temporary, file_path, 0, image_buffer, 0, NULL) == 0) {
+		printf ("PNG: Image write fuck up!\n");
+	}
+
+	png_image_free (& temporary);
+}
+
 int main (int argc, char * * argv) {
-	(void) argc;
-	(void) argv;
-	return (0);
+	FILE * file = NULL;
+
+	size_t file_size = 0;
+
+	if (argc != 4) {
+		printf ("Encode: xiew -e input output\n");
+		printf ("Decode: xiew -d input output\n");
+		return (EXIT_FAILURE);
+	}
+
+	if (strcmp (argv [1], "-e") == 0) {
+		printf ("Encoding...\n");
+		file = fopen (argv [2], "r");
+		if (file == NULL) printf ("File is null.\n");
+		fseek (file, 0, SEEK_END);
+		file_size = (size_t) ftell (file);
+		printf ("File size: %lu\n", file_size);
+		fseek (file, 0, SEEK_SET);
+		image_width = image_height = (unsigned int) (sqrt (((double) file_size) / 3.0) + 1);
+		printf ("Image size: %u x %u\n", image_width, image_height);
+		image_buffer = calloc ((size_t) (image_width * image_height), sizeof (* image_buffer));
+		image_buffer [0] = (unsigned int) file_size;
+		fread (& image_buffer [1], sizeof (char), file_size, file);
+		export_image (argv [3]);
+	} else if (strcmp (argv [1], "-d") == 0) {
+		printf ("Decoding...\n");
+		import_image (argv [2]);
+		file = fopen (argv [3], "w");
+		if (file == NULL) printf ("File is null.\n");
+		file_size = image_buffer [0];
+		printf ("File size: %lu\n", file_size);
+		fwrite (& image_buffer [1], sizeof (char), file_size, file);
+	} else {
+		printf ("Encode: xiew -e input output\n");
+		printf ("Decode: xiew -d input output\n");
+		return (EXIT_FAILURE);
+	}
+
+	if (image_buffer != NULL) {
+		free (image_buffer);
+	}
+
+	fclose (file);
+
+	return (EXIT_SUCCESS);
 }