diff --git a/src/common/cpp_essentials/base_extentions/qrcode_version.rs b/src/common/cpp_essentials/base_extentions/qrcode_version.rs
index e0415a3..a61fb44 100644
--- a/src/common/cpp_essentials/base_extentions/qrcode_version.rs
+++ b/src/common/cpp_essentials/base_extentions/qrcode_version.rs
@@ -16,6 +16,16 @@ use crate::Exceptions;
 // }
 
 impl Version {
+    pub fn FromDimension(dimension: u32) -> Result<VersionRef> {
+        todo!()
+        // bool isMicro = dimension < 21;
+        // if (dimension % DimensionStep(isMicro) != 1) {
+        // 	//throw std::invalid_argument("Unexpected dimension");
+        // 	return nullptr;
+        // }
+        // return FromNumber((dimension - DimensionOffset(isMicro)) / DimensionStep(isMicro), isMicro);
+    }
+
     pub fn DimensionOfVersion(version: u32, is_micro: bool) -> u32 {
         Self::DimensionOffset(is_micro) + Self::DimensionStep(is_micro) * version
     }
diff --git a/src/qrcode/cpp_port/bitmatrix_parser.rs b/src/qrcode/cpp_port/bitmatrix_parser.rs
index 40a98e8..3c33ac8 100644
--- a/src/qrcode/cpp_port/bitmatrix_parser.rs
+++ b/src/qrcode/cpp_port/bitmatrix_parser.rs
@@ -10,6 +10,8 @@ use crate::{
     Exceptions,
 };
 
+use super::detector::AppendBit;
+
 pub fn getBit(bitMatrix: &BitMatrix, x: u32, y: u32, mirrored: Option<bool>) -> bool {
     let mirrored = mirrored.unwrap_or(false);
     if mirrored {
@@ -29,27 +31,33 @@ pub fn hasValidDimension(bitMatrix: &BitMatrix, isMicro: bool) -> bool {
 }
 
 pub fn ReadVersion(bitMatrix: &BitMatrix) -> Result<VersionRef> {
-    todo!()
-    // int dimension = bitMatrix.height();
+    let dimension = bitMatrix.height();
 
-    // const Version* version = Version::FromDimension(dimension);
+    let mut version = Version::FromDimension(dimension)?;
 
-    // if (!version || version->versionNumber() < 7)
-    // 	return version;
+    if (version.getVersionNumber() < 7) {
+        return Ok(version);
+    }
 
-    // for (bool mirror : {false, true}) {
-    // 	// Read top-right/bottom-left version info: 3 wide by 6 tall (depending on mirrored)
-    // 	int versionBits = 0;
-    // 	for (int y = 5; y >= 0; --y)
-    // 		for (int x = dimension - 9; x >= dimension - 11; --x)
-    // 			AppendBit(versionBits, getBit(bitMatrix, x, y, mirror));
+    for mirror in [false, true] {
+        // for (bool mirror : {false, true}) {
+        // Read top-right/bottom-left version info: 3 wide by 6 tall (depending on mirrored)
+        let mut versionBits = 0;
+        for y in (0..=5).rev() {
+            // for (int y = 5; y >= 0; --y) {
+            for x in ((dimension - 11)..=(dimension - 9)).rev() {
+                // for (int x = dimension - 9; x >= dimension - 11; --x) {
+                AppendBit(&mut versionBits, getBit(bitMatrix, x, y, Some(mirror)));
+            }
+        }
 
-    // 	version = Version::DecodeVersionInformation(versionBits);
-    // 	if (version && version->dimension() == dimension)
-    // 		return version;
-    // }
+        version = Version::DecodeVersionInformation(versionBits, 0)?; // THIS MIGHT BE WRONG todo!()
+        if (version.getDimensionForVersion() == dimension) {
+            return Ok(version);
+        }
+    }
 
-    // return nullptr;
+    return Err(Exceptions::FORMAT);
 }
 
 pub fn ReadFormatInformation(bitMatrix: &BitMatrix, isMicro: bool) -> Result<FormatInformation> {
diff --git a/src/qrcode/cpp_port/detector.rs b/src/qrcode/cpp_port/detector.rs
index d95fc64..ac34c16 100644
--- a/src/qrcode/cpp_port/detector.rs
+++ b/src/qrcode/cpp_port/detector.rs
@@ -448,7 +448,7 @@ pub fn ReadVersion(
     Version::DecodeVersionInformation(bits[0], bits[1])
 }
 
-fn AppendBit(val: &mut i32, bit: bool) {
+pub fn AppendBit(val: &mut i32, bit: bool) {
     *val <<= 1;
 
     *val |= i32::from(bit)
diff --git a/src/qrcode/decoder/mode.rs b/src/qrcode/decoder/mode.rs
index b7b2b51..47e97fc 100644
--- a/src/qrcode/decoder/mode.rs
+++ b/src/qrcode/decoder/mode.rs
@@ -167,7 +167,34 @@ impl Mode {
      *         count of characters that will follow encoded in this Mode
      */
     pub fn CharacterCountBits(&self, version: &Version) -> u32 {
-        todo!()
+        let number = version.getVersionNumber() as usize;
+        if (version.isMicroQRCode()) {
+            match (self) {
+		 Mode::NUMERIC=>      return [3, 4, 5, 6][number - 1],
+		 Mode::ALPHANUMERIC=> return [3, 4, 5][number - 2],
+		 Mode::BYTE=>         return [4, 5][number - 3],
+		 Mode::KANJI | //=>        [[fallthrough]],
+		 Mode::HANZI=>        return [3, 4][number - 3],
+		_=> return 0,
+		}
+        }
+
+        let i = if (number <= 9) {
+            0
+        } else if (number <= 26) {
+            1
+        } else {
+            2
+        };
+
+        match (self) {
+	 Mode::NUMERIC=>      return [10, 12, 14][i],
+	 Mode::ALPHANUMERIC=> return [9, 11, 13][i],
+	 Mode::BYTE=>         return [8, 16, 16][i],
+	 Mode::KANJI|    //    [[fallthrough]];
+	 Mode::HANZI=>        return [8, 10, 12][i],
+	_=>                     return 0,
+	}
     }
 }