New upstream version 18.11-rc1

[deb_dpdk.git] / lib / librte_eal / common / eal_common_string_fns.c

diff --git a/lib/librte_eal/common/eal_common_string_fns.c b/lib/librte_eal/common/eal_common_string_fns.c
index 6ac5f82..60c5dd6 100644 (file)
--- a/lib/librte_eal/common/eal_common_string_fns.c
+++ b/lib/librte_eal/common/eal_common_string_fns.c
@@ -38,3 +38,29 @@ einval_error:
        errno = EINVAL;
        return -1;
 }
+
+/* Copy src string into dst.
+ *
+ * Return negative value and NUL-terminate if dst is too short,
+ * Otherwise return number of bytes copied.
+ */
+ssize_t
+rte_strscpy(char *dst, const char *src, size_t dsize)
+{
+       size_t nleft = dsize;
+       size_t res = 0;
+
+       /* Copy as many bytes as will fit. */
+       while (nleft != 0) {
+               dst[res] = src[res];
+               if (src[res] == '\0')
+                       return res;
+               res++;
+               nleft--;
+       }
+
+       /* Not enough room in dst, set NUL and return error. */
+       if (res != 0)
+               dst[res - 1] = '\0';
+       return -E2BIG;
+}