Having decided not to provide a libmemstat(3) error number to text

conversion routine, now change my mind and add one, memstat_strerror(3),
which returns a const char * pointer to a string describing the error,
to be used on the results of memstat_mtl_geterror().

While here, also correct a minor typo in the HISTORY man page.

Pointers on improving ease of internationalization would be
appreciated.

MFC after:	1 day

1 files changed, 21 insertions, 0 deletions

diff --git a/lib/libmemstat/memstat.c b/lib/libmemstat/memstat.c
index f053e95..f32541f 100644
--- a/lib/libmemstat/memstat.c
+++ b/lib/libmemstat/memstat.c
@@ -38,6 +38,27 @@
 #include "memstat.h"
 #include "memstat_internal.h"
 
+const char *
+memstat_strerror(int error)
+{
+
+	switch (error) {
+	case MEMSTAT_ERROR_NOMEMORY:
+		return ("Cannot allocate memory");
+	case MEMSTAT_ERROR_VERSION:
+		return ("Version mismatch");
+	case MEMSTAT_ERROR_PERMISSION:
+		return ("Permission denied");
+	case MEMSTAT_ERROR_TOOMANYCPUS:
+		return ("Too many CPUs");
+	case MEMSTAT_ERROR_DATAERROR:
+		return ("Data format error");
+	case MEMSTAT_ERROR_UNDEFINED:
+	default:
+		return ("Unknown error");
+	}
+}
+
 struct memory_type_list *
 memstat_mtl_alloc(void)
 {