Flatten InfoZIP directory and fix build issues

third_party/zip/zbz2err.c

@@ -0,0 +1,50 @@
+/* clang-format off */
+/*
+  Copyright (c) 1990-2008 Info-ZIP.  All rights reserved.
+
+  See the accompanying file LICENSE, version 2007-Mar-4 or later
+  (the contents of which are also included in zip.h) for terms of use.
+  If, for some reason, all these files are missing, the Info-ZIP license
+  also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
+*/
+/*---------------------------------------------------------------------------
+
+  zbz2err.c
+
+  This file contains the "fatal error" callback routine required by the
+  "minimal" (silent, non-stdio) setup of the bzip2 compression library.
+
+  The fatal bzip2 error bail-out routine is provided in a separate code
+  module, so that it can be easily overridden when the Zip package is
+  used as a static link library. One example is the WinDLL static library
+  usage for building a monolithic binary of the Windows application "WiZ"
+  that supports bzip2 both in compression and decompression operations.
+
+  Contains:  bz_internal_error()      (BZIP2_SUPPORT only)
+
+  Adapted from UnZip ubz2err.c, with all the DLL fine print stripped
+  out.
+
+  ---------------------------------------------------------------------------*/
+
+
+#define __ZBZ2ERR_C     /* identifies this source module */
+
+#include "libc/fmt/fmt.h"
+#include "third_party/zip/zip.h"
+#include "third_party/bzip2/bzlib.h"
+
+/**********************************/
+/*  Function bz_internal_error()  */
+/**********************************/
+
+/* Call-back function for the bzip2 decompression code (compiled with
+ * BZ_NO_STDIO), required to handle fatal internal bug-type errors of
+ * the bzip2 library.
+ */
+void bz_internal_error(errcode)
+    int errcode;
+{
+    sprintf(errbuf, "fatal error (code %d) in bzip2 library", errcode);
+    ziperr(ZE_LOGIC, errbuf);
+} /* end function bz_internal_error() */