diff --git a/src/gargoyle.c b/src/gargoyle.c
index 044fe0b..b4cf268 100644
--- a/src/gargoyle.c
+++ b/src/gargoyle.c
@@ -89,3 +89,38 @@ uint8_t gargoyle_digest_args(uint16_t optc, struct gargoyle_opt *optv, int *argc
 
   return GARGOYLE_ERR_SUCCESS;
 }
+
+uint8_t gargoyle_digest_envh(uint16_t optc, struct gargoyle_opt *optv, const char *prefix, uint16_t prefix_sz, char ***envh, gargoyle_flag_type flags) {
+  if(flags & GARGOYLE_FLG_BCASE) {
+    flags |= GARGOYLE_FLG_ICASE;
+  }
+
+  for(; **envh; *envh += 1) {
+    const char *var = **envh;
+
+    if(!gargoyle_cmp(prefix, var, prefix_sz, flags) || *(var + prefix_sz) != '_') {
+      continue;
+    }
+
+    const char *brand = var + prefix_sz + 1;
+    struct gargoyle_opt *opt = gargoyle_find_brand(optc, optv, brand, "NO_", 3, flags);
+
+    if(!opt) {
+      if(flags & GARGOYLE_FLG_STRCT) {
+        return GARGOYLE_ERR_UNKNOWN_OPT;
+      } else {
+        continue;
+      }
+    }
+
+    uint8_t res = 0;
+
+    if(opt->type & GARGOYLE_TYPE_BOOL) {
+      res = gargoyle_from_bool(opt, brand, "NO_", 3, flags);
+    } else {
+      res = gargoyle_from_rope(opt, brand + opt->brand_sz + 1, flags);
+    }
+  }
+
+  return 0;
+}