31 lines
888 B
Go
31 lines
888 B
Go
package main
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// Size corresponds to an expression that represents the number of bytes
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// in some *thing*. Generally, sizes are used to allocate buffers and to
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// inform X how big requests are.
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// Size is basically a thin layer over an Expression that yields easy methods
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// for adding and multiplying sizes.
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type Size struct {
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Expression
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}
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// newFixedSize creates a new Size with some fixed and known value.
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func newFixedSize(fixed uint) Size {
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return Size{&Value{v: int(fixed)}}
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}
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// newExpressionSize creates a new Size with some expression.
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func newExpressionSize(variable Expression) Size {
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return Size{variable}
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}
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// Add adds s1 and s2 and returns a new Size.
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func (s1 Size) Add(s2 Size) Size {
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return Size{newBinaryOp("+", s1, s2)}
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}
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// Multiply mupltiplies s1 and s2 and returns a new Size.
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func (s1 Size) Multiply(s2 Size) Size {
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return Size{newBinaryOp("*", s1, s2)}
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}
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