2 files changed, 19 insertions, 0 deletions
diff --git a/lib/lib.c b/lib/lib.c
index b0ac4715..6559030c 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -1015,3 +1015,21 @@ char *show_uuid(char *uuid)
 
   return libbuf;
 }
+
+// Returns pointer to letter at end, 0 if none. *start = initial %
+char *next_printf(char *s, char **start)
+{
+  for (; *s; s++) {
+    if (*s != '%') continue;
+    if (*++s == '%') continue;
+    if (start) *start = s-1;
+    while (0 <= stridx("0'#-+ ", *s)) s++;
+    while (isdigit(*s)) s++;
+    if (*s == '.') s++;
+    while (isdigit(*s)) s++;
+
+    return s;
+  }
+
+  return 0;
+}
diff --git a/lib/lib.h b/lib/lib.h
index f1cea22e..e3dbc462 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -196,6 +196,7 @@ int yesno(int def);
 int qstrcmp(const void *a, const void *b);
 void create_uuid(char *uuid);
 char *show_uuid(char *uuid);
+char *next_printf(char *s, char **start);
 
 #define HR_SPACE 1 // Space between number and units
 #define HR_B     2 // Use "B" for single byte units