tree e12814e522733bb85cbd91780a8769f10da41606
parent d13e925213b09496f3782c7b1dc9097b4dc26336
author Willy Tarreau <w@1wt.eu> 1574434733 +0100
committer Willy Tarreau <w@1wt.eu> 1574675931 +0100
encoding latin1

MINOR: ist: add ist_find_ctl()

This new function looks for the first control character in a string (a
char whose value is between 0x00 and 0x1F included) and returns it, or
NULL if there is none. It is optimized for quickly evicting non-matching
strings and scans ~0.43 bytes per cycle. It can be used as an accelerator
when it's needed to look up several of these characters (e.g. CR/LF/NUL).

(cherry picked from commit 8f3ce06f14e13719c9353794d60001eab8d43717)
Signed-off-by: Willy Tarreau <w@1wt.eu>