Module Std.Bigbuffer


module Bigbuffer: Bigbuffer

type t 
The abstract type of buffers.
val create : int -> t
create n returns a fresh buffer, initially empty. The n parameter is the initial size of the internal string that holds the buffer contents. That string 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.
val contents : t -> string
Return a copy of the current contents of the buffer. The buffer itself is unchanged.
val big_contents : t -> Bigstring.t
Return a copy of the current contents of the buffer as a bigstring. The buffer itself is unchanged.
val volatile_contents : t -> Bigstring.t
Return the actual underlying bigstring used by this bigbuffer. This means that there is no copy, but it also means that the contents of this Bigstring.t may/will be changed by further operations on the Bigbuffer
val sub : t -> int -> int -> string
Bigbuffer.sub b off len returns (a copy of) the substring of the current contents of the buffer b starting at offset off of length len bytes. May raise Invalid_argument if out of bounds request. The buffer itself is unaffected.
val blit : src:t ->
src_pos:int -> dst:string -> dst_pos:int -> len:int -> unit
blit ~src ~src_pos ~dst ~dst_pos ~len copies len characters from the current contents of the buffer src, starting at offset src_pos to string dst, starting at character dst_pos.

Raise Invalid_argument if src_pos and len do not designate a valid substring of src, or if dst_pos and len do not designate a valid substring of dst.

val nth : t -> int -> char
get the (zero-based) n-th character of the buffer. Raise Invalid_argument if index out of bounds
val length : t -> int
Return the number of characters currently contained in the buffer.
val clear : t -> unit
Empty the buffer.
val reset : t -> unit
Empty the buffer and deallocate the internal string holding the buffer contents, replacing it with the initial internal string of length n that was allocated by Bigbuffer.create n. For long-lived buffers that may have grown a lot, reset allows faster reclamation of the space used by the buffer.
val add_char : t -> char -> unit
add_char b c appends the character c at the end of the buffer b.
val add_string : t -> string -> unit
add_string b s appends the string s at the end of the buffer b.
val add_substring : t -> string -> int -> int -> unit
add_substring b s ofs len takes len characters from offset ofs in string s and appends them at the end of the buffer b.
val add_substitute : t -> (string -> string) -> string -> unit
add_substitute b f s appends the string pattern s at the end of the buffer b with substitution. The substitution process looks for variables into the pattern and substitutes each variable name by its value, as obtained by applying the mapping f to the variable name. Inside the string pattern, a variable name immediately follows a non-escaped $ character and is one of the following:
val add_buffer : t -> t -> unit
add_buffer b1 b2 appends the current contents of buffer b2 at the end of buffer b1. b2 is not modified.
val add_channel : t -> Pervasives.in_channel -> int -> unit
add_channel b ic n reads exactly n character from the input channel ic and stores them at the end of buffer b. Raise End_of_file if the channel contains fewer than n characters.
val output_buffer : Pervasives.out_channel -> t -> unit
output_buffer oc b writes the current contents of buffer b on the output channel oc.

NOTE: additions
module Format: sig .. end
module Printf: sig .. end