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Description
From https://public-inbox.org/git/[email protected]/:
This new way to initialize an strbuf would set buf to the specified constant string, the appropriate len = strlen(string), and alloc to 0.
That way, we can initialize strbufs with constant values, only allocating memory when/if needed.
We will need to be careful to revisit all strbuf_*() functions to make sure that they test not only for enough space when growing the string, but also when reducing it (unless reducing to len == 0, in which case we can reassign strbuf_slopbuf to the buf field).
We also will need to revisit strbuf_*() to understand alloc < len to mean that we cannot call realloc(), but have to malloc() && memcpy() instead.