Class creation

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Creating a class file

emit_class_header()

• Called first
• Emits the Java class file magic number (0xCAFEBABE).
• Sets the class file version to Java 8 (minor_version = 0, major_version = 52).

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Constant Pool

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Fields Section Management

• void fields_start()
  Initializes the fields section. Reserves space for the fields_count and starts the counter at 0.

• void field_info(uint16_t access_flags, uint16_t name_index, uint16_t descriptor_index)
  Adds a field entry with the specified access flags, name, and descriptor index. Increments the counter and starts the attributes section for the field.

• void end_field_info()
  Finalizes the attributes for the current field.

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

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Methods Section Management

• void methods_start()
  Initializes the methods section. Reserves space for the methods_count and starts the counter at 0.

• void method_info(uint16_t access_flags, uint16_t name_index, uint16_t descriptor_index)
  Adds a method entry with the specified access flags, name, and descriptor index. Increments the counter and starts the attributes section for the method.

• void end_method_info()
  Finalizes the attributes for the current method.

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

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Bytecode

• void bytecode_start()
  Initializes the bytecode section. Reserves space for the bytecode_length and sets the offset for the bytecode.

• void ldc(1) Loads the first constant onto the stack

• void bytecode_end()
  Finalizes the bytecode section by patching the bytecode_length at the reserved location.

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Code Attribute Handling

code_attribute_start(uint16_t name_index, uint16_t max_stack, uint16_t max_locals)

• Starts a code attribute with the method's name and stack/locals limits.
• Begins bytecode emission with bytecode_start().

code_attribute_end()

• Ends bytecode emission with bytecode_end().
• Emits 0 for exception table length and attributes count.
• Ends the attribute with attribute_end().

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emit_class_footer(uint16_t this_class, uint8_t this_class_flags, uint16_t super_class)

• Called last
• Sets the access flags to the given flag integer.
• References the class and its superclass (this_class and super_class).

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