package octez-proto-libs
Byte sequence operations.
A byte sequence is a mutable data structure that contains a fixed-length sequence of bytes. Each byte can be indexed in constant time for reading or writing.
Given a byte sequence s of length l, we can access each of the l bytes of s via its index in the sequence. Indexes start at 0, and we will call an index valid in s if it falls within the range [0...l-1] (inclusive). A position is the point between two bytes or at the beginning or end of the sequence. We call a position valid in s if it falls within the range [0...l] (inclusive). Note that the byte at index n is between positions n and n+1.
Two parameters start and len are said to designate a valid range of s if len >= 0 and start and start+len are valid positions in s.
Byte sequences can be modified in place, for instance via the set and blit functions described below. See also strings (module String), which are almost the same data structure, but cannot be modified in place.
Bytes are represented by the OCaml type char.
get s n returns the byte at index n in argument s.
Raise Invalid_argument if n is not a valid index in s.
set s n c modifies s in place, replacing the byte at index n with c.
Raise Invalid_argument if n is not a valid index in s.
make n c returns a new byte sequence of length n, filled with the byte c.
Raise Invalid_argument if n < 0 or n > Sys.max_string_length.
Bytes.init n f returns a fresh byte sequence of length n, with character i initialized to the result of f i (in increasing index order).
Raise Invalid_argument if n < 0 or n > Sys.max_string_length.
Return a new byte sequence that contains the same bytes as the given string.
Return a new string that contains the same bytes as the given byte sequence.
sub s start len returns a new byte sequence of length len, containing the subsequence of s that starts at position start and has length len.
Raise Invalid_argument if start and len do not designate a valid range of s.
Same as sub but return a string instead of a byte sequence.
extend s left right returns a new byte sequence that contains the bytes of s, with left uninitialized bytes prepended and right uninitialized bytes appended to it. If left or right is negative, then bytes are removed (instead of appended) from the corresponding side of s.
Raise Invalid_argument if the result length is negative or longer than Sys.max_string_length bytes.
fill s start len c modifies s in place, replacing len characters with c, starting at start.
Raise Invalid_argument if start and len do not designate a valid range of s.
blit src srcoff dst dstoff len copies len bytes from sequence src, starting at index srcoff, to sequence dst, starting at index dstoff. It works correctly even if src and dst are the same byte sequence, and the source and destination intervals overlap.
Raise Invalid_argument if srcoff and len do not designate a valid range of src, or if dstoff and len do not designate a valid range of dst.
blit src srcoff dst dstoff len copies len bytes from string src, starting at index srcoff, to byte sequence dst, starting at index dstoff.
Raise Invalid_argument if srcoff and len do not designate a valid range of src, or if dstoff and len do not designate a valid range of dst.
concat sep sl concatenates the list of byte sequences sl, inserting the separator byte sequence sep between each, and returns the result as a new byte sequence.
Raise Invalid_argument if the result is longer than Sys.max_string_length bytes.
cat s1 s2 concatenates s1 and s2 and returns the result as new byte sequence.
Raise Invalid_argument if the result is longer than Sys.max_string_length bytes.
iter f s applies function f in turn to all the bytes of s. It is equivalent to f (get s 0); f (get s 1); ...; f (get s
(length s - 1)); ().
Same as Bytes.iter, but the function is applied to the index of the byte as first argument and the byte itself as second argument.
map f s applies function f in turn to all the bytes of s (in increasing index order) and stores the resulting bytes in a new sequence that is returned as the result.
mapi f s calls f with each character of s and its index (in increasing index order) and stores the resulting bytes in a new sequence that is returned as the result.
Return a copy of the argument, without leading and trailing whitespace. The bytes regarded as whitespace are the ASCII characters ' ', '\012', '\n', '\r', and '\t'.
Return a copy of the argument, with special characters represented by escape sequences, following the lexical conventions of OCaml. All characters outside the ASCII printable range (32..126) are escaped, as well as backslash and double-quote.
Raise Invalid_argument if the result is longer than Sys.max_string_length bytes.
index_opt s c returns the index of the first occurrence of byte c in s or None if c does not occur in s.
rindex_opt s c returns the index of the last occurrence of byte c in s or None if c does not occur in s.
index_from _opts i c returns the index of the first occurrence of byte c in s after position i or None if c does not occur in s after position i. Bytes.index_opt s c is equivalent to Bytes.index_from_opt s 0 c.
Raise Invalid_argument if i is not a valid position in s.
rindex_from_opt s i c returns the index of the last occurrence of byte c in s before position i+1 or None if c does not occur in s before position i+1. rindex_opt s c is equivalent to rindex_from s (Bytes.length s - 1) c.
Raise Invalid_argument if i+1 is not a valid position in s.
contains_from s start c tests if byte c appears in s after position start. contains s c is equivalent to contains_from
s 0 c.
Raise Invalid_argument if start is not a valid position in s.
rcontains_from s stop c tests if byte c appears in s before position stop+1.
Raise Invalid_argument if stop < 0 or stop+1 is not a valid position in s.
Return a copy of the argument, with all lowercase letters translated to uppercase, using the US-ASCII character set.
Return a copy of the argument, with all uppercase letters translated to lowercase, using the US-ASCII character set.
Return a copy of the argument, with the first character set to uppercase, using the US-ASCII character set.
Return a copy of the argument, with the first character set to lowercase, using the US-ASCII character set.
The comparison function for byte sequences, with the same specification as Stdlib.compare. Along with the type t, this function compare allows the module Bytes to be passed as argument to the functors Set.Make and Map.Make.