core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/crt/internal/signer/AwsChunkedV4aPayloadSigner.java [170:192]:
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    private long calculateChunksLength(long contentLength, long extensionsLength) {
        long lengthInBytes = 0;
        long chunkHeaderLength = Integer.toHexString(chunkSize).length();
        long numChunks = contentLength / chunkSize;

        // normal chunks
        // x<metadata>\r\n<data>\r\n
        lengthInBytes += numChunks * (chunkHeaderLength + extensionsLength + 2 + chunkSize + 2);

        // remaining chunk
        // x<metadata>\r\n<data>\r\n
        long remainingBytes = contentLength % chunkSize;
        if (remainingBytes > 0) {
            long remainingChunkHeaderLength = Long.toHexString(remainingBytes).length();
            lengthInBytes += remainingChunkHeaderLength + extensionsLength + 2 + remainingBytes + 2;
        }

        // final chunk
        // 0<metadata>\r\n
        lengthInBytes += 1 + extensionsLength + 2;

        return lengthInBytes;
    }
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core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/internal/signer/AwsChunkedV4PayloadSigner.java [189:211]:
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    private long calculateChunksLength(long contentLength, long extensionsLength) {
        long lengthInBytes = 0;
        long chunkHeaderLength = Integer.toHexString(chunkSize).length();
        long numChunks = contentLength / chunkSize;

        // normal chunks
        // x<metadata>\r\n<data>\r\n
        lengthInBytes += numChunks * (chunkHeaderLength + extensionsLength + 2 + chunkSize + 2);

        // remaining chunk
        // x<metadata>\r\n<data>\r\n
        long remainingBytes = contentLength % chunkSize;
        if (remainingBytes > 0) {
            long remainingChunkHeaderLength = Long.toHexString(remainingBytes).length();
            lengthInBytes += remainingChunkHeaderLength + extensionsLength + 2 + remainingBytes + 2;
        }

        // final chunk
        // 0<metadata>\r\n
        lengthInBytes += 1 + extensionsLength + 2;

        return lengthInBytes;
    }
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