+/**
+ * bytestring_starts - test if the start of one bytestring matches another
+ * @s, @prefix: bytestrings
+ *
+ * Returns true if @prefix appears as a substring at the beginning of
+ * @s, false otherwise.
+ */
+static inline bool bytestring_starts(struct bytestring s,
+ struct bytestring prefix)
+{
+ return memstarts(s.ptr, s.len, prefix.ptr, prefix.len);
+}
+
+/**
+ * bytestring_ends - test if the end of one bytestring matches another
+ * @s, @suffix: bytestrings
+ *
+ * Returns true if @suffix appears as a substring at the end of @s,
+ * false otherwise.
+ */
+static inline bool bytestring_ends(struct bytestring s,
+ struct bytestring suffix)
+{
+ return memends(s.ptr, s.len, suffix.ptr, suffix.len);
+}
+
+/**
+ * bytestring_index - locate character in bytestring
+ * @haystack: a bytestring
+ * @needle: a character or byte value
+ *
+ * Returns a pointer to the first occurrence of @needle within
+ * @haystack, or NULL if @needle does not appear in @haystack.
+ */
+static inline const char *bytestring_index(struct bytestring haystack,
+ char needle)
+{
+ return memchr(haystack.ptr, needle, haystack.len);
+}
+
+/**
+ * bytestring_rindex - locate character in bytestring
+ * @haystack: a bytestring
+ * @needle: a character or byte value
+ *
+ * Returns a pointer to the last occurrence of @needle within
+ * @haystack, or NULL if @needle does not appear in @haystack.
+ */
+static inline const char *bytestring_rindex(struct bytestring haystack,
+ char needle)
+{
+ return memrchr(haystack.ptr, needle, haystack.len);
+}
+
+/*
+ * bytestring_bytestring - search for a bytestring in another bytestring
+ * @haystack, @needle: bytestrings
+ *
+ * Returns a bytestring corresponding to the first occurrence of
+ * @needle in @haystack, or bytestring_NULL if @needle is not found
+ * within @haystack.
+ */
+static inline struct bytestring bytestring_bytestring(struct bytestring haystack,
+ struct bytestring needle)
+{
+ const char *p = memmem(haystack.ptr, haystack.len,
+ needle.ptr, needle.len);
+ if (p)
+ return bytestring(p, needle.len);
+ else
+ return bytestring_NULL;
+}
+
+/**
+ * bytestring_spn - search a bytestring for a set of bytes
+ * @s: a bytestring
+ * @accept: a bytestring containing a set of bytes to accept
+ *
+ * Returns the length, in bytes, of the initial segment of @s which
+ * consists entirely of characters in @accept.
+ */
+size_t bytestring_spn(struct bytestring s, struct bytestring accept);
+
+/**
+ * bytestring_cspn - search a bytestring for a set of bytes (complemented)
+ * @s: a bytestring
+ * @reject: a bytestring containing a set of bytes to reject
+ *
+ * Returns the length, in bytes, of the initial segment of @s which
+ * consists entirely of characters not in @reject.
+ */
+size_t bytestring_cspn(struct bytestring s, struct bytestring reject);
+
+/**
+ * bytestring_splitchr_first - split a bytestring on a single character delimiter
+ * @whole: a bytestring
+ * @delim: delimiter character
+ *
+ * Returns the first @delim delimited substring of @whole.
+ */
+struct bytestring bytestring_splitchr_first(struct bytestring whole,
+ char delim);
+
+/**
+ * bytestring_splitchr_next - split a bytestring on a single character delimiter
+ * @whole: a bytestring
+ * @delim: delimiter character
+ * @prev: last substring
+ *
+ * Returns the next @delim delimited substring of @whole after @prev.
+ */
+struct bytestring bytestring_splitchr_next(struct bytestring whole,
+ char delim, struct bytestring prev);
+
+#define bytestring_foreach_splitchr(_s, _w, _delim) \
+ for ((_s) = bytestring_splitchr_first((_w), (_delim)); \
+ (_s).ptr; \
+ (_s) = bytestring_splitchr_next((_w), (_delim), (_s)))
+
+/**
+ * bytestring_splitchrs_first - split a bytestring on a set of delimiter
+ * characters
+ * @whole: a bytestring
+ * @delim: delimiter characters
+ *
+ * Returns the first substring of @whole delimited by any character in
+ * @delim.
+ */
+struct bytestring bytestring_splitchrs_first(struct bytestring whole,
+ struct bytestring delim);
+
+/**
+ * bytestring_splitchr_next - split a bytestring on a set of delimiter
+ * characters
+ * @whole: a bytestring
+ * @delim: delimiter character
+ * @prev: last substring
+ *
+ * Returns the next @delim delimited substring of @whole after @prev.
+ */
+struct bytestring bytestring_splitchrs_next(struct bytestring whole,
+ struct bytestring delim,
+ struct bytestring prev);
+
+#define bytestring_foreach_splitchrs(_s, _w, _delim) \
+ for ((_s) = bytestring_splitchrs_first((_w), (_delim)); \
+ (_s).ptr; \
+ (_s) = bytestring_splitchrs_next((_w), (_delim), (_s)))
+
+/**
+ * bytestring_splitstr_first - split a bytestring on a delimiter string
+ * @whole: a bytestring
+ * @delim: delimiter substring
+ *
+ * Returns the first substring of @whole delimited by the substring in
+ * @delim.
+ */
+struct bytestring bytestring_splitstr_first(struct bytestring whole,
+ struct bytestring delim);
+
+/**
+ * bytestring_splitstr_next - split a bytestring on a delimiter string
+ * @whole: a bytestring
+ * @delim: delimiter string
+ * @prev: last substring
+ *
+ * Returns the next @delim delimited substring of @whole after @prev.
+ */
+struct bytestring bytestring_splitstr_next(struct bytestring whole,
+ struct bytestring delim,
+ struct bytestring prev);
+
+#define bytestring_foreach_splitstr(_s, _w, _delim) \
+ for ((_s) = bytestring_splitstr_first((_w), (_delim)); \
+ (_s).ptr; \
+ (_s) = bytestring_splitstr_next((_w), (_delim), (_s)))
+