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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;
}
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