1 files changed, 98 insertions, 0 deletions
diff --git a/src/core/strs.c b/src/core/strs.c
new file mode 100644
index 00000000..7f236236
--- /dev/null
+++ b/src/core/strs.c
@@ -0,0 +1,98 @@
+//
+// Copyright 2017 Garrett D'Amore <garrett@damore.org>
+// Copyright 2017 Capitar IT Group BV <info@capitar.com>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "core/nng_impl.h"
+
+// This file contains implementation of utility functions that are not
+// part of standard C99.  (C11 has added some things here, but we cannot
+// count on them.)
+
+char *
+nni_strdup(const char *src)
+{
+#ifdef NNG_HAVE_STRDUP
+	return (strdup(src));
+#else
+	char * dst;
+	size_t len = strlen(src);
+
+	if ((dst = nni_alloc(len)) != NULL) {
+		memcpy(dst, src, len);
+	}
+	return (dst);
+#endif
+}
+
+void
+nni_strfree(char *s)
+{
+	if (s != NULL) {
+#ifdef NNG_HAVE_STRDUP
+		free(s);
+#else
+		nni_free(s, strlen(s) + 1);
+#endif
+	}
+}
+
+size_t
+nni_strlcpy(char *dst, const char *src, size_t len)
+{
+#ifdef NNG_HAVE_STRLCPY
+	return (strlcpy(dst, src, len));
+#else
+	size_t n;
+	char   c;
+
+	n = 0;
+	do {
+		c = *src++;
+		n++;
+		if (n < len) {
+			*dst++ = c;
+		} else if (n == len) {
+			*dst = '\0';
+		}
+	} while (c);
+	return (n - 1);
+#endif
+}
+
+size_t
+nni_strlcat(char *dst, const char *src, size_t len)
+{
+#ifdef NNG_HAVE_STRLCAT
+	return (strlcat(dst, src, len));
+#else
+	size_t n;
+	char   c;
+
+	n = 0;
+	while ((*dst != '\0') && (n < len)) {
+		n++;
+		dst++;
+	}
+
+	do {
+		c = *src++;
+		n++;
+		if (n < len) {
+			*dst++ = c;
+		} else if (n == len) {
+			*dst = '\0';
+		}
+	} while (c);
+
+	return (n - 1);
+#endif
+}