72 lines
2.6 KiB
Ada
72 lines
2.6 KiB
Ada
with Ada.Finalization;
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generic
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--type Character_Type is private;
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type Character_Type is (<>);
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Null_Character: Character_Type;
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package H3.Strings is
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type Elastic_String is private;
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type Character_Array is array(System_Index range <>) of Character_Type;
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--type Character_Array_Pointer is access all Character_Array;
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subtype Thin_Character_Array is Character_Array(System_Index'Range);
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type Thin_Character_Array_Pointer is access Thin_Character_Array;
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function To_Character_Array (Str: in Elastic_String) return Character_Array;
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function Get_Capacity (Str: in Elastic_String) return System_Size;
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pragma Inline (Get_Capacity);
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function Get_Length (Str: in Elastic_String) return System_Size;
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pragma Inline (Get_Length);
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-- the return type is System_Size for consistency with Get_Last_Index.
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function Get_First_Index (Str: in Elastic_String) return System_Size;
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pragma Inline (Get_First_Index);
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-- the return type is System_Size because the Last index is -1 off the System_Index'First for an empty string
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function Get_Last_Index (Str: in Elastic_String) return System_Size;
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pragma Inline (Get_Last_index);
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function Get_Item (Str: in Elastic_String; Pos: in System_Index) return Character_Type;
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pragma Inline (Get_Item);
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-- unsafe
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function Get_Slot_Pointer (Str: in Elastic_String) return Thin_Character_Array_Pointer;
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pragma Inline (Get_Slot_Pointer);
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function Is_Shared(Str: in Elastic_String) return Standard.Boolean;
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pragma Inline (Is_Shared);
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procedure Purge (Str: in out Elastic_String);
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procedure Clear (Str: in out Elastic_String);
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procedure Append (Str: in out Elastic_String; V: in Character_Array);
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procedure Append (Str: in out Elastic_String; V: in Character_Type);
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procedure Insert (Str: in out Elastic_String; Pos: in System_Index; New_Char: in Character_Type);
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procedure Replace (Str: in out Elastic_String; Pos: in System_Index; New_Char: in Character_Type);
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private
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type Buffer_Record(Capa: System_Size) is limited record
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Refs: System_Size := 1;
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Slot: Character_Array(1 .. Capa);
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Last: System_Size := 0;
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end record;
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type Buffer_Pointer is access all Buffer_Record;
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--Empty_Buffer: aliased Buffer_Record(1);
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Empty_Buffer: aliased Buffer_Record := (Capa => 1, Refs => 0, Slot => (1 => Null_Character), Last => 0);
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type Elastic_String is new Ada.Finalization.Controlled with record
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Buffer: Buffer_Pointer := Empty_Buffer'Access;
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end record;
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overriding procedure Initialize (Str: in out Elastic_String);
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overriding procedure Adjust (Str: in out Elastic_String);
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overriding procedure Finalize (Str: in out Elastic_String);
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end H3.Strings;
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