_FRUT_version_to_dec Miscalculating For AU Builds With Larger Revision Numbers.

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_FRUT_version_to_dec Miscalculating for AU Builds with Larger Revision Numbers

Introduction

When generating AU (.component) packages, developers may encounter issues where the version in info.plist -> AudioComponents is too high of a number, resulting in the .component becoming undetectable in auval. This issue only occurs for higher revision numbers, i.e., greater than 100. In this article, we will delve into the root cause of this issue and propose a solution to ensure accurate version calculations.

Description of the Issue

When generating AU .component packages, the version in info.plist -> AudioComponents is calculated using the _FRUT_version_to_dec function in Reproducer.cmake. However, for higher revision numbers, the calculation produces an incorrect result, leading to the .component becoming undetectable in auval.

Example of the Issue

Consider a plugin with version 1.1.1.108. The expected version output in info.plist -> AudioComponents should be 16843116. However, the actual output is 1157425104234217472, which is a significantly higher number.

Root Cause of the Issue

The root cause of this issue lies in the _FRUT_version_to_dec function in Reproducer.cmake. The function uses the following code to calculate the decimal value of the version number:

math(EXPR dec_value "(${major} << 16) + (${minor} << 8) + ${patch}")
if(segments_size GREATER 3)
  list(GET segments 3 revision)
  math(EXPR dec_value "${dec_value} << 8 + ${revision}")
endif()

The issue arises from the order of operations in the second math(EXPR) statement. When the revision number is higher than 100, the dec_value becomes shifted by (8+108), resulting in a too-large output.

Proposed Solution

To resolve this issue, we propose using a bitwise OR operation instead of addition in the _FRUT_version_to_dec function. The corrected code is as follows:

math(EXPR dec_value "(${major} << 16) | (${minor} << 8) | ${patch}")
if(segments_size GREATER 3)
  list(GET segments 3 revision)
  math(EXPR dec_value "${dec_value} << 8 | ${revision}")
endif()

This produces a more reliable calculation of the decimal value of a given version number.

Benefits of the Proposed Solution

The proposed solution offers several benefits, including:

  • Improved accuracy: The bitwise OR operation ensures accurate calculations of the decimal value of the version number, even for higher revision numbers.
  • Reduced errors: By avoiding the issue of shifting the dec_value by an incorrect amount, the proposed solution reduces the likelihood of errors in the version calculation.
  • Simplified code: The use of bitwise OR operations simplifies the code and makes it easier to understand and maintain.

Conclusion

In conclusion, the _FRUT_version_to_dec function in Reproducer.cmake produces incorrect results for higher revision numbers, leading to issues with AU .component packages. By using a bitwise OR operation instead of addition, we can ensure accurate calculations of the decimal value of the version number. This proposed solution offers improved accuracy, reduced errors, and simplified code, making it a valuable contribution to the development of AU .component packages.

Implementation

To implement the proposed solution, developers can modify the _FRUT_version_to_dec function in Reproducer.cmake to use bitwise OR operations instead of addition. The corrected code is as follows:

math(EXPR dec_value "(${major} << 16) | (${minor} << 8) | ${patch}")
if(segments_size GREATER 3)
  list(GET segments 3 revision)
  math(EXPR dec_value "${dec_value} << 8 | ${revision}")
endif()

By implementing this solution, developers can ensure accurate version calculations and avoid issues with AU .component packages.

Future Work

Future work on this issue may include:

  • Testing and validation: Thorough testing and validation of the proposed solution to ensure its accuracy and reliability.
  • Code review and optimization: Reviewing and optimizing the code to ensure it is efficient, readable, and maintainable.
  • Integration with other tools: Integrating the proposed solution with other tools and frameworks to ensure seamless compatibility and functionality.

By addressing this issue and implementing the proposed solution, developers can ensure accurate version calculations and improve the overall quality and reliability of AU .component packages.
_FRUT_version_to_dec Miscalculating for AU Builds with Larger Revision Numbers: Q&A

Introduction

In our previous article, we discussed the issue of the _FRUT_version_to_dec function in Reproducer.cmake producing incorrect results for higher revision numbers, leading to issues with AU .component packages. We proposed a solution using bitwise OR operations instead of addition to ensure accurate calculations of the decimal value of the version number. In this Q&A article, we will address some common questions and concerns related to this issue.

Q: What is the root cause of the issue?

A: The root cause of the issue lies in the _FRUT_version_to_dec function in Reproducer.cmake. The function uses the following code to calculate the decimal value of the version number:

math(EXPR dec_value "(${major} << 16) + (${minor} << 8) + ${patch}")
if(segments_size GREATER 3)
  list(GET segments 3 revision)
  math(EXPR dec_value "${dec_value} << 8 + ${revision}")
endif()

The issue arises from the order of operations in the second math(EXPR) statement. When the revision number is higher than 100, the dec_value becomes shifted by (8+108), resulting in a too-large output.

Q: Why is the bitwise OR operation a better solution?

A: The bitwise OR operation is a better solution because it ensures accurate calculations of the decimal value of the version number, even for higher revision numbers. By using bitwise OR operations, we can avoid the issue of shifting the dec_value by an incorrect amount, which leads to incorrect results.

Q: How do I implement the proposed solution?

A: To implement the proposed solution, you can modify the _FRUT_version_to_dec function in Reproducer.cmake to use bitwise OR operations instead of addition. The corrected code is as follows:

math(EXPR dec_value "(${major} << 16) | (${minor} << 8) | ${patch}")
if(segments_size GREATER 3)
  list(GET segments 3 revision)
  math(EXPR dec_value "${dec_value} << 8 | ${revision}")
endif()

Q: What are the benefits of the proposed solution?

A: The proposed solution offers several benefits, including:

  • Improved accuracy: The bitwise OR operation ensures accurate calculations of the decimal value of the version number, even for higher revision numbers.
  • Reduced errors: By avoiding the issue of shifting the dec_value by an incorrect amount, the proposed solution reduces the likelihood of errors in the version calculation.
  • Simplified code: The use of bitwise OR operations simplifies the code and makes it easier to understand and maintain.

Q: Can I use the proposed solution with other tools and frameworks?

A: Yes, the proposed solution can be used with other tools and frameworks. The solution is based on the bitwise OR operation, which is a standard operation in most programming languages. Therefore, you can easily integrate the proposed solution with other tools and frameworks.

Q: How do I test and validate the proposed solution?

A: To test and validate the proposed solution, you can use the following steps:

  1. Verify the accuracy: Verify that the proposed solution produces accurate results for a range of version numbers, including higher revision numbers.
  2. Test for errors: Test the proposed solution for errors, such as division by zero or overflow.
  3. Validate with other tools: Validate the proposed solution with other tools and frameworks to ensure seamless compatibility and functionality.

Q: What are the future work plans for this issue?

A: Future work on this issue may include:

  • Testing and validation: Thorough testing and validation of the proposed solution to ensure its accuracy and reliability.
  • Code review and optimization: Reviewing and optimizing the code to ensure it is efficient, readable, and maintainable.
  • Integration with other tools: Integrating the proposed solution with other tools and frameworks to ensure seamless compatibility and functionality.

By addressing this issue and implementing the proposed solution, developers can ensure accurate version calculations and improve the overall quality and reliability of AU .component packages.