1 files changed, 15 insertions, 0 deletions
diff --git a/src/libstddjb/stralloc_insertb.c b/src/libstddjb/stralloc_insertb.c
new file mode 100644
index 0000000..339ffff
--- /dev/null
+++ b/src/libstddjb/stralloc_insertb.c
@@ -0,0 +1,15 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/stralloc.h>
+
+int stralloc_insertb (stralloc *sa, unsigned int offset, char const *s, unsigned int n)
+{
+  if (offset > sa->len) return (errno = EINVAL, 0) ;
+  if (!stralloc_readyplus(sa, n)) return 0 ;
+  byte_copyr(sa->s + offset + n, sa->len - offset, sa->s + offset) ;
+  sa->len += n ;
+  byte_copyr(sa->s + offset, n, s) ;
+  return 1 ;
+}