/* 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 "testutil.h"
#include "apr_mmap.h"
#include "apr_errno.h"
#include "apr_general.h"
#include "apr_lib.h"
#include "apr_file_io.h"
#include "apr_strings.h"

/* hmmm, what is a truly portable define for the max path
 * length on a platform?
 */
#define PATH_LEN 255

#if !APR_HAS_MMAP
static void not_implemented(abts_case *tc, void *data)
{
    ABTS_NOT_IMPL(tc, "MMAP functions");
}

#else

static apr_pool_t *ptest;
static char *thisfdata; /* read from the datafile */
static apr_mmap_t *themmap = NULL;
static apr_file_t *thefile = NULL;
static char *file1;
static apr_finfo_t thisfinfo;
static apr_size_t thisfsize;

static struct {
    const char *filename;
    apr_off_t offset;
} test_set[] = {
    { "/data/mmap_datafile.txt", 0 },
    { "/data/mmap_large_datafile.txt", 65536 },
    { "/data/mmap_large_datafile.txt", 66650 }, /* not page aligned */
    { NULL, }
};

static void create_filename(abts_case *tc, void *data)
{
    const char *filename = data;
    char *oldfileptr;

    apr_filepath_get(&file1, 0, ptest);
#ifndef NETWARE
#ifdef WIN32
    ABTS_TRUE(tc, file1[1] == ':');
#else
    ABTS_TRUE(tc, file1[0] == '/');
#endif
#endif
    ABTS_TRUE(tc, file1[strlen(file1) - 1] != '/');

    oldfileptr = file1;
    file1 = apr_pstrcat(ptest, file1, filename, NULL);
    ABTS_TRUE(tc, oldfileptr != file1);
}

static void test_file_close(abts_case *tc, void *data)
{
    apr_status_t rv;

    rv = apr_file_close(thefile);
    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
    thefile = NULL;
}
   
static void test_file_open(abts_case *tc, void *data)
{
    apr_status_t rv;

    rv = apr_file_open(&thefile, file1, APR_FOPEN_READ,
                       APR_FPROT_UREAD | APR_FPROT_GREAD, ptest);
    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
    ABTS_PTR_NOTNULL(tc, thefile);
}
   
static void test_get_filesize(abts_case *tc, void *data)
{
    apr_status_t rv;

    rv = apr_file_info_get(&thisfinfo, APR_FINFO_NORM, thefile);
    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
    ABTS_TRUE(tc, thisfinfo.size == (apr_off_t)(apr_size_t)thisfinfo.size);

    thisfsize = (apr_size_t)thisfinfo.size;
    thisfdata = apr_palloc(ptest, thisfsize + 1);
    ABTS_PTR_NOTNULL(tc, thisfdata);
}

static void read_expected_contents(abts_case *tc, void *data)
{
    apr_off_t *offset = data;
    apr_size_t nbytes = 0;
    apr_status_t rv;

    ABTS_TRUE(tc, *offset == (apr_off_t)(apr_size_t)*offset);

    rv = apr_file_read_full(thefile, thisfdata, thisfsize, &nbytes);
    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
    ABTS_ASSERT(tc, "File size mismatch", nbytes == thisfsize);
    thisfdata[nbytes] = '\0';
    ABTS_ASSERT(tc, "File content size mismatch",
                strlen(thisfdata) == thisfsize);
    ABTS_ASSERT(tc, "File size too small",
                (apr_size_t)*offset < thisfsize);

    /* From now, pretend that the file data and size don't include the
     * offset, this avoids adding/substrating it to thisfdata/thisfsize
     * all over the place in the next tests.
     */
    thisfdata += *offset;
    thisfsize -= (apr_size_t)*offset;
}

static void test_mmap_create(abts_case *tc, void *data)
{
    apr_off_t *offset = data;
    apr_status_t rv;

    rv = apr_mmap_create(&themmap, thefile, *offset, thisfsize,
                         APR_MMAP_READ, ptest);
    ABTS_PTR_NOTNULL(tc, themmap);
    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
}

static void test_mmap_contents(abts_case *tc, void *data)
{
    ABTS_PTR_NOTNULL(tc, themmap);
    ABTS_PTR_NOTNULL(tc, themmap->mm);
    ABTS_SIZE_EQUAL(tc, thisfsize, themmap->size);

    /* Must use nEquals since the string is not guaranteed to be NULL terminated */
    ABTS_STR_NEQUAL(tc, themmap->mm, thisfdata, thisfsize);
}

static void test_mmap_delete(abts_case *tc, void *data)
{
    apr_status_t rv;

    ABTS_PTR_NOTNULL(tc, themmap);
    rv = apr_mmap_delete(themmap);
    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
    themmap = NULL;
}

static void test_mmap_offset(abts_case *tc, void *data)
{
    apr_status_t rv;
    void *addr;

    ABTS_PTR_NOTNULL(tc, themmap);
    rv = apr_mmap_offset(&addr, themmap, 5);

    ABTS_INT_EQUAL(tc, APR_SUCCESS, rv);
    /* Must use nEquals since the string is not guaranteed to be NULL terminated */
    ABTS_STR_NEQUAL(tc, addr, thisfdata + 5, thisfsize - 5);
}

#endif

abts_suite *testmmap(abts_suite *suite)
{
#if APR_HAS_MMAP
    int i;
#endif
    suite = ADD_SUITE(suite)

#if APR_HAS_MMAP
    apr_pool_create(&ptest, p);
    for (i = 0; test_set[i].filename; ++i) {
        abts_run_test(suite, create_filename, (void *)test_set[i].filename);
        abts_run_test(suite, test_file_open, NULL);
        abts_run_test(suite, test_get_filesize, NULL);
        abts_run_test(suite, read_expected_contents, &test_set[i].offset);
        abts_run_test(suite, test_mmap_create, &test_set[i].offset);
        abts_run_test(suite, test_mmap_contents, &test_set[i].offset);
        abts_run_test(suite, test_mmap_offset, &test_set[i].offset);
        abts_run_test(suite, test_mmap_delete, NULL);
        abts_run_test(suite, test_file_close, NULL);
        apr_pool_clear(ptest);
    }
    apr_pool_destroy(ptest);
#else
    abts_run_test(suite, not_implemented, NULL);
#endif

    return suite;
}