Add option to generate C source

rres/cmd/rrem/README.md

@@ -18,6 +18,8 @@ Usage of ./rrem:
     	Generate C header (.h file)
   -key string
     	Encryption key
+  -source
+    	Generate C source (.c file)
 ```
 
 ### Example

rres/cmd/rrem/main.go

@@ -53,6 +53,7 @@ func main() {
 	enc := flag.Int("enc", rres.CryptoNone, "Encryption type, 0=NONE, 1=XOR, 2=AES, 3=3DES, 4=Blowfish, 5=XTEA")
 	key := flag.String("key", "", "Encryption key")
 	header := flag.Bool("header", false, "Generate C header (.h file)")
+	source := flag.Bool("source", false, "Generate C source (.c file)")
 	bin := flag.Bool("bin", false, "Generate Go bindata (.go file)")
 	flag.Parse()
 
@@ -114,6 +115,17 @@ func main() {
 		defer headerFile.Close()
 	}
 
+	var sourceFile *os.File
+	if *source {
+		sourceFile, err = os.Create(fmt.Sprintf("%s.c", *base))
+		if err != nil {
+			fmt.Printf("%v\n", err)
+			os.Exit(1)
+		}
+
+		defer sourceFile.Close()
+	}
+
 	var fileHeader rres.FileHeader
 
 	// "rRES" identifier
@@ -390,6 +402,50 @@ func main() {
 		}
 	}
 
+	// Generate C source
+	if *source {
+		rresFile.Seek(0, 0)
+		d, err := ioutil.ReadAll(rresFile)
+		if err != nil {
+			fmt.Printf("%v\n", err)
+		}
+
+		_, err = sourceFile.Write([]byte("// This file has been automatically generated by rREM - raylib Resource Embedder\n\n"))
+		if err != nil {
+			fmt.Printf("%v\n", err)
+		}
+
+		_, err = sourceFile.Write([]byte(fmt.Sprintf("const unsigned char data[%d] = {\n    ", len(d))))
+		if err != nil {
+			fmt.Printf("%v\n", err)
+		}
+
+		blCounter := 0 // break line counter
+
+		for i := 0; i < len(d)-1; i++ {
+			blCounter++
+
+			_, err = sourceFile.Write([]byte(fmt.Sprintf("0x%.2x, ", d[i])))
+			if err != nil {
+				fmt.Printf("%v\n", err)
+			}
+
+			if blCounter >= 24 {
+				_, err = sourceFile.Write([]byte("\n    "))
+				if err != nil {
+					fmt.Printf("%v\n", err)
+				}
+
+				blCounter = 0
+			}
+		}
+
+		_, err = sourceFile.Write([]byte(fmt.Sprintf("0x%.2x };\n", d[len(d)-1])))
+		if err != nil {
+			fmt.Printf("%v\n", err)
+		}
+	}
+
 	// Generate bindata
 	if *bin {
 		cfg := bindata.NewConfig()