Add spice_strndup

Also, make str(n)dup handle NULL correctly

1 files changed, 18 insertions, 0 deletions

diff --git a/common/mem.c b/common/mem.c
index ad0cccf6..56b37157 100644
--- a/common/mem.c
+++ b/common/mem.c
@@ -32,11 +32,29 @@ char *spice_strdup(const char *str)
 {
     char *copy;
 
+    if (str == NULL) {
+        return NULL;
+    }
+
     copy = (char *)spice_malloc(strlen(str) + 1);
     strcpy(copy, str);
     return copy;
 }
 
+char *spice_strndup(const char *str, size_t n_bytes)
+{
+    char *copy;
+
+    if (str == NULL) {
+        return NULL;
+    }
+
+    copy = (char *)spice_malloc(n_bytes + 1);
+    strncpy(copy, str, n_bytes);
+    copy[n_bytes] = 0;
+    return copy;
+}
+
 void *spice_memdup(const void *mem, size_t n_bytes)
 {
     void *copy;