patch: added str_error()

include/re_fmt.h

@@ -107,6 +107,8 @@ void str_ncpy(char *dst, const char *src, size_t n);
 int  str_dup(char **dst, const char *src);
 int  str_casecmp(const char *s1, const char *s2);
 size_t str_len(const char *s);
+const char *str_error(int errnum, char *buf, size_t sz);
+
 
 /**
  * Check if string is set

src/fmt/mod.mk

@@ -11,4 +11,5 @@ SRCS	+= fmt/print.c
 SRCS	+= fmt/prm.c
 SRCS	+= fmt/regex.c
 SRCS	+= fmt/str.c
+SRCS	+= fmt/str_error.c
 SRCS	+= fmt/time.c

src/fmt/print.c

@@ -3,8 +3,6 @@
  *
  * Copyright (C) 2010 Creytiv.com
  */
-#define _GNU_SOURCE 1
-#define __EXTENSIONS__ 1
 #include <string.h>
 #include <re_types.h>
 #include <re_sa.h>
@@ -315,11 +313,9 @@ int re_vhprintf(const char *fmt, va_list ap, re_vprintf_h *vph, void *arg)
 			break;
 
 		case 'm':
-			(void)strerror_r(va_arg(ap, int), addr, sizeof(addr));
-			addr[sizeof(addr)-1] = '\0';
-
-			err |= write_padded(addr, strlen(addr), pad, ' ',
-					    plr, NULL, vph, arg);
+			str = str_error(va_arg(ap, int), addr, sizeof(addr));
+			err |= write_padded(str, str_len(str), pad,
+					    ' ', plr, NULL, vph, arg);
 			break;
 
 		case 'p':

src/fmt/str_error.c

@@ -0,0 +1,39 @@
+/**
+ * @file str_error.c System error messages
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+#define _GNU_SOURCE 1
+#define __EXTENSIONS__ 1
+#include <string.h>
+#include <re_types.h>
+#include <re_fmt.h>
+
+
+/**
+ * Look up an error message string corresponding to an error number.
+ *
+ * @param errnum Error Code
+ * @param buf    Buffer for storing error message
+ * @param sz     Buffer size
+ *
+ * @return Error message string
+ */
+const char *str_error(int errnum, char *buf, size_t sz)
+{
+	const char *s;
+
+	if (!buf || !sz)
+		return NULL;
+
+	buf[0] = '\0';
+#ifdef LINUX
+	s = strerror_r(errnum, buf, sz);
+#else
+	(void)strerror_r(errnum, buf, sz);
+	s = buf;
+#endif
+	buf[sz - 1] = '\0';
+
+	return s;
+}