cutils: Provide strchrnul

strchrnul is a GNU extension and thus unavailable on a number of targets.
In the review for a commit removing strchrnul from 9p, I was asked to
create a qemu_strchrnul helper to factor out this functionality.
Do so, and use it in a number of other places in the code base that inlined
the replacement pattern in a place where strchrnul could be used.

Signed-off-by: Keno Fischer <keno@juliacomputing.com>
Acked-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Greg Kurz <groug@kaod.org>

1 files changed, 2 insertions, 6 deletions

diff --git a/monitor.c b/monitor.c
index 0730a27172..80af6a9390 100644
--- a/monitor.c
+++ b/monitor.c
@@ -820,9 +820,7 @@ static int compare_cmd(const char *name, const char *list)
     p = list;
     for(;;) {
         pstart = p;
-        p = strchr(p, '|');
-        if (!p)
-            p = pstart + strlen(pstart);
+        p = qemu_strchrnul(p, '|');
         if ((p - pstart) == len && !memcmp(pstart, name, len))
             return 1;
         if (*p == '\0')
@@ -3489,9 +3487,7 @@ static void cmd_completion(Monitor *mon, const char *name, const char *list)
     p = list;
     for(;;) {
         pstart = p;
-        p = strchr(p, '|');
-        if (!p)
-            p = pstart + strlen(pstart);
+        p = qemu_strchrnul(p, '|');
         len = p - pstart;
         if (len > sizeof(cmd) - 2)
             len = sizeof(cmd) - 2;