Add crc32appender source and precompiled binaries for Win and Linux x86_64 (#320)

3 files changed, 39 insertions, 0 deletions

diff --git a/Tools/crc32appender/crc32appender.go b/Tools/crc32appender/crc32appender.go
new file mode 100644
index 00000000..668f5d00
--- /dev/null
+++ b/Tools/crc32appender/crc32appender.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"encoding/binary"
+	"hash/crc32"
+	"io/ioutil"
+	"os"
+)
+
+func main() {
+
+	// Loop through arguments
+	for _, f := range os.Args[1:] {
+
+		// Read the file to memory and panic if it fails
+		b, err := ioutil.ReadFile(f)
+		if err != nil {
+			panic(err)
+		}
+		// Calculate CRC32 with IEEE polynomials
+		c := crc32.ChecksumIEEE(b)
+
+		// Open the same file for appending and panic if it fails
+		f, err := os.OpenFile(f, os.O_APPEND|os.O_WRONLY, 0644)
+		if err != nil {
+			panic(err)
+		}
+		defer f.Close()
+
+		// Create little-endian represenation of CRC32 sum
+		le := make([]byte, crc32.Size)
+		binary.LittleEndian.PutUint32(le, c)
+
+		// Append the CRC32 and panic if it fails
+		if _, err = f.Write(le); err != nil {
+			panic(err)
+		}
+	}
+}
diff --git a/Tools/crc32appender/linux-x86_64/crc32appender b/Tools/crc32appender/linux-x86_64/crc32appender
new file mode 100755
index 00000000..5c282dac
--- /dev/null
+++ b/Tools/crc32appender/linux-x86_64/crc32appender
diff --git a/Tools/crc32appender/win-x86_64/crc32appender.exe b/Tools/crc32appender/win-x86_64/crc32appender.exe
new file mode 100755
index 00000000..9dcdfef0
--- /dev/null
+++ b/Tools/crc32appender/win-x86_64/crc32appender.exe