Helper function to clean up the test directory structure

Helper function to create a test directory structure

reset token_buffer; current character is beginning of token

Span::size() Returns the size of this span.

take a -128..127 value and stbi__clamp it and convert to 0..255

returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow

initialize a callback-based context

initialize a memory-decode context

Returns a bitmask representing the positions of empty slots. ------------------------------------------------------------