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=head1 Name
SPVM::Document::NativeAPI::StringBuffer - String Buffer Native APIs
=head1 Description
The string buffer native APIs of L<SPVM> are the APIs to manipulate string buffers
=head1 Usage
  SPVM_API_STRING_BUFFER* string_buffer_api = env->api->string_buffer;
   
  void* string_buffer = string_buffer_api->new_instance();
   
  string_buffer_api->free_instance(string_buffer);
=head1 Native APIs
=head2 new_instance
  void* (*new_instance)(void* allocator, int32_t capacity);
Creates a new string buffer object and returns it.
The C<allocator> argument is an L<allocator|SPVM::Document::NativeAPI::Allocator> object.
The C<capacity> argument is the capacity of the string buffer.
=head2 free_instance
  void (*free_instance)(void* string_buffer);
Frees a string buffer object.
=head2 get_string
  const char* (*get_string)(void* string_buffer);
Gets the string in the string buffer object.
=head2 get_length
  int32_t (*get_length)(void* string_buffer);
Gets the length of the string in the string buffer object.
=head1 Native API IDs
  0 new_instance
  1 free_instance
  2 get_string
  3 get_length
=head1 Copyright & License
Copyright (c) 2023 Yuki Kimoto
MIT License