Rename eai2str to gai_strerror (#131)

libc/dns/gai_strerror.c

@@ -0,0 +1,67 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/dns/dns.h"
+
+/**
+ * Turns getaddrinfo() return code into string.
+ */
+const char *gai_strerror(int code) {
+  switch (code) {
+    case EAI_ADDRFAMILY:
+      return "ADDRFAMILY";
+    case EAI_AGAIN:
+      return "AGAIN";
+    case EAI_ALLDONE:
+      return "ALLDONE";
+    case EAI_BADFLAGS:
+      return "BADFLAGS";
+    case EAI_CANCELED:
+      return "CANCELED";
+    case EAI_FAIL:
+      return "FAIL";
+    case EAI_FAMILY:
+      return "FAMILY";
+    case EAI_IDN_ENCODE:
+      return "ENCODE";
+    case EAI_INPROGRESS:
+      return "INPROGRESS";
+    case EAI_INTR:
+      return "INTR";
+    case EAI_MEMORY:
+      return "MEMORY";
+    case EAI_NODATA:
+      return "NODATA";
+    case EAI_NONAME:
+      return "NONAME";
+    case EAI_NOTCANCELED:
+      return "NOTCANCELED";
+    case EAI_OVERFLOW:
+      return "OVERFLOW";
+    case EAI_SERVICE:
+      return "SERVICE";
+    case EAI_SOCKTYPE:
+      return "SOCKTYPE";
+    case EAI_SUCCESS:
+      return "SUCCESS";
+    case EAI_SYSTEM:
+      return "SYSTEM";
+    default:
+      return "???";
+  }
+}