wip

Signed-off-by: Pin <wf6DJd8a3xSSCZbn@protonmail.com>

crc.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include "CRCLib.h"
+
+int png_signature[8] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a };
+//int idat_signature[4] = { 0x, 0x, 0x, 0x}
+
+int CheckPNG(int *addr) {
+	int signature_match = 0;
+	for( int i = 0; i < 8; i++ ) {
+		if (addr[i] != png_signature[i]) {
+			signature_match = 1;
+		}
+	}
+	printf("%d", signature_match);
+	return signature_match;
+
+}
+
+void main() {
+	FILE *fp;
+	int c;
+	int myArray[255] = {};
+	int i = 0;
+	fp = fopen("./1.png", "rt");
+	while((c = fgetc(fp)) != EOF) {
+		//printf("Value: %X\n", c);
+		myArray[i] = c;
+		i++;
+	}
+	fclose(fp);
+	CheckPNG(myArray);
+	//printf("%d\n", CheckPNG(myArray));
+	//int crcnum = crc(myArray, 19);
+	//printf("%08X\n", crcnum);
+}