Extensible buffers.
This module implements buffers that automatically expand as necessary. It provides accumulative concatenation of strings in quasi-linear time (instead of quadratic time when strings are concatenated pairwise).
type bigstring =
(char, Bigarray.int8_unsigned_elt, Bigarray.c_layout) Bigarray.Array1.tval create : int -> tcreate n returns a fresh buffer, initially empty. The n parameter is the initial size of the internal byte sequence that holds the buffer contents. That byte sequence is automatically reallocated when more than n characters are stored in the buffer, but shrinks back to n characters when reset is called. For best performance, n should be of the same order of magnitude as the number of characters that are expected to be stored in the buffer (for instance, 80 for a buffer that holds one output line). Nothing bad will happen if the buffer grows beyond that limit, however. In doubt, take n = 16 for instance. If n is not between 1 and Sys.max_string_length, it will be clipped to that interval.
Return a copy of the current contents of the buffer. The buffer itself is unchanged.
val add_char : t -> char -> unitadd_char b c appends the character c at the end of buffer b.
val length : t -> intReturn the number of characters currently contained in the buffer.
val add_string : t -> string -> unitadd_string b s appends the string s at the end of buffer b.
val add_substring : t -> string -> int -> int -> unitadd_substring b s ofs len takes len characters from offset ofs in string s and appends them at the end of buffer b.
val add_subbytes : t -> bytes -> int -> int -> unitadd_subbytes b s ofs len takes len characters from offset ofs in byte sequence s and appends them at the end of buffer b.
val nth : t -> int -> charGet the n-th character of the buffer. Raise Invalid_argument if index out of bounds
val clear : t -> unitEmpty the buffer.
val reset : t -> unitEmpty the buffer and deallocate the internal byte sequence holding the buffer contents, replacing it with the initial internal byte sequence of length n that was allocated by Buffer.create n. For long-lived buffers that may have grown a lot, reset allows faster reclamation of the space used by the buffer.