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625f7b1cdc
In a future commit I'm going to be creating gdb.Membuf objects from a new file within gdb/python/py*.c. Currently all gdb.Membuf objects are created directly within infpy_read_memory (as a result of calling gdb.Inferior.read_memory()). Initially I split out the Membuf creation code into a new function, and left the new function in gdb/python/py-inferior.c, however, it felt a little random that the Membuf creation code should live with the inferior handling code. So, then I moved all of the Membuf related code out into a new file, gdb/python/py-membuf.c, the interface is gdbpy_buffer_to_membuf, which wraps an array of bytes into a gdb.Membuf object. Most of the code is moved directly from py-inferior.c with only minor tweaks to layout and replacing NULL with nullptr, hence, I've left the copyright date on py-membuf.c as 2009-2021 to match py-inferior.c. Currently, the only user of this code is still py-inferior.c, but in later commits this will change. There should be no user visible changes after this commit.