Attribute management

Overview

These functions manage the attributes section of the Java class file. This section lists the attributes associated with the class.

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1. Initialization & Finalization

• void attributes_start()
  Initializes the attributes section. Reserves space for the attributes_count and starts the counter at 0.

• void attributes_end()
  Finalizes the attributes section by patching the total entry count at the reserved location.

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2. Attribute Entry Function

• Attribute Reference → attribute_start(uint16_t attribute_name_index)
  Adds an attribute reference to the section. Increments the counter and reserves space for attribute_length.

• void attribute_end()
  Finalizes the current attribute by calculating its length and updating the attribute_length field.

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3. Utility Functions

• void patch_u2(size_t pos, uint16_t v)
  Updates a 2-byte value in the buffer (used to finalize attributes_count).

• void patch_u4(size_t pos, uint32_t v)
  Updates a 4-byte value in the buffer (used for attribute_length).

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Usage Example

attributes_start();
attribute_start(5); // Adds an attribute reference with name index 5
attribute_end(); // Finalizes the attribute
attributes_end();

This will generate an attributes section with one entry.

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