1 files changed, 15 insertions, 0 deletions
diff --git a/src/libstddjb/envalloc_merge.c b/src/libstddjb/envalloc_merge.c
new file mode 100644
index 0000000..9134b84
--- /dev/null
+++ b/src/libstddjb/envalloc_merge.c
@@ -0,0 +1,15 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/env.h>
+#include <skalibs/genalloc.h>
+#include <skalibs/envalloc.h>
+
+int envalloc_merge (genalloc *v, char const *const *envp, unsigned int envlen, char const *modifs, unsigned int modiflen)
+{
+  unsigned int n = envlen + 1 + byte_count(modifs, modiflen, '\0') ;
+  if (!genalloc_readyplus(char const *, v, n)) return 0 ;
+  n = env_merge(genalloc_s(char const *, v) + genalloc_len(char const *, v), n, envp, envlen, modifs, modiflen) ;
+  genalloc_setlen(char const *, v, genalloc_len(char const *, v) + n) ;
+  return 1 ;
+}