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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_private.h"
+
+#include "apr_arch_misc.h"
+#include "apr_arch_file_io.h"
+#include <assert.h>
+
+/* This module is the source of -static- helper functions that are
+ * entirely internal to apr. If the fn is exported - it does not
+ * belong here.
+ *
+ * Namespace decoration is still required to protect us from symbol
+ * clashes in static linkages.
+ */
+
+
+/* Shared by apr_app.c and start.c
+ *
+ * An internal apr function to convert an array of strings (either
+ * a counted or NULL terminated list, such as an argv[argc] or env[]
+ * list respectively) from wide Unicode strings to narrow utf-8 strings.
+ * These are allocated from the MSVCRT's _CRT_BLOCK to trick the system
+ * into trusting our store.
+ */
+int apr_wastrtoastr(char const * const * *retarr,
+ wchar_t const * const *arr, int args)
+{
+ apr_size_t elesize = 0;
+ char **newarr;
+ char *elements;
+ char *ele;
+ int arg;
+
+ if (args < 0) {
+ for (args = 0; arr[args]; ++args)
+ ;
+ }
+
+ newarr = apr_malloc_dbg((args + 1) * sizeof(char *),
+ __FILE__, __LINE__);
+
+ for (arg = 0; arg < args; ++arg) {
+ newarr[arg] = (void*)(wcslen(arr[arg]) + 1);
+ elesize += (apr_size_t)newarr[arg];
+ }
+
+ /* This is a safe max allocation, we will realloc after
+ * processing and return the excess to the free store.
+ * 3 ucs bytes hold any single wchar_t value (16 bits)
+ * 4 ucs bytes will hold a wchar_t pair value (20 bits)
+ */
+ elesize = elesize * 3 + 1;
+ ele = elements = apr_malloc_dbg(elesize * sizeof(char),
+ __FILE__, __LINE__);
+
+ for (arg = 0; arg < args; ++arg) {
+ apr_size_t len = (apr_size_t)newarr[arg];
+ apr_size_t newlen = elesize;
+
+ newarr[arg] = ele;
+ (void)apr_conv_ucs2_to_utf8(arr[arg], &len,
+ newarr[arg], &elesize);
+
+ newlen -= elesize;
+ ele += newlen;
+ assert(elesize && (len == 0));
+ }
+
+ newarr[arg] = NULL;
+ *(ele++) = '\0';
+
+ /* Return to the free store if the heap realloc is the least bit optimized
+ */
+ ele = apr_realloc_dbg(elements, ele - elements,
+ __FILE__, __LINE__);
+
+ if (ele != elements) {
+ apr_size_t diff = ele - elements;
+ for (arg = 0; arg < args; ++arg) {
+ newarr[arg] += diff;
+ }
+ }
+
+ *retarr = (char const * const *)newarr;
+ return args;
+}