From cdf0885fe033ce345aae23ed90a3cac0b19d3039 Mon Sep 17 00:00:00 2001
From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Sat, 29 Oct 2016 05:26:50 +0300
Subject: [PATCH] util: add printing helper for sorted xlat arrays

* util.c (printxval_searchn): New function.
* defs.h (printxval_searchn): New prototype.
(printxval_search): New helper macro useful in conjunction with static
xlat arrays.
---
 defs.h |  4 ++++
 util.c | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/defs.h b/defs.h
index b2907403..52a9e4d7 100644
--- a/defs.h
+++ b/defs.h
@@ -545,6 +545,10 @@ extern int printllval(struct tcb *, const char *, int)
 extern void printaddr_ull(unsigned long long);
 extern void printxvals(const uint64_t, const char *, const struct xlat *, ...)
 	ATTRIBUTE_SENTINEL;
+extern void printxval_searchn(const struct xlat *xlat, size_t xlat_size,
+	uint64_t val, const char *dflt);
+#define printxval_search(xlat__, val__, dflt__) \
+	printxval_searchn(xlat__, ARRAY_SIZE(xlat__), val__, dflt__)
 extern long long getarg_ll(struct tcb *tcp, int argn);
 extern unsigned long long getarg_ull(struct tcb *tcp, int argn);
 extern int printargs(struct tcb *);
diff --git a/util.c b/util.c
index 69da3ee3..05c0e15c 100644
--- a/util.c
+++ b/util.c
@@ -228,6 +228,24 @@ printxvals(const uint64_t val, const char *dflt, const struct xlat *xlat, ...)
 	va_end(args);
 }
 
+/*
+ * Print entry in sorted struct xlat table, if it is there.
+ */
+void
+printxval_searchn(const struct xlat *xlat, size_t xlat_size, uint64_t val,
+	const char *dflt)
+{
+	const char *s = xlat_search(xlat, xlat_size, val);
+
+	if (s) {
+		tprints(s);
+	} else {
+		tprintf("%#" PRIx64, val);
+		if (dflt)
+			tprintf(" /* %s */", dflt);
+	}
+}
+
 /*
  * Fetch 64bit argument at position arg_no and
  * return the index of the next argument.
-- 
2.40.0