2 * Copyright (C) 2013 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
23 #include "private/bionic_macros.h"
24 #include "private/ScopedReaddir.h"
26 // A smart pointer to the scandir dirent**.
29 ScandirResult() : names_(NULL), size_(0), capacity_(0) {
34 free(names_[--size_]);
44 dirent** result = names_;
46 size_ = capacity_ = 0;
50 bool Add(dirent* entry) {
51 if (size_ >= capacity_) {
52 size_t new_capacity = capacity_ + 32;
54 reinterpret_cast<dirent**>(realloc(names_, new_capacity * sizeof(dirent*)));
55 if (new_names == NULL) {
59 capacity_ = new_capacity;
62 dirent* copy = CopyDirent(entry);
66 names_[size_++] = copy;
70 void Sort(int (*comparator)(const dirent**, const dirent**)) {
71 // If we have entries and a comparator, sort them.
72 if (size_ > 0 && comparator != NULL) {
73 qsort(names_, size_, sizeof(dirent*),
74 reinterpret_cast<int (*)(const void*, const void*)>(comparator));
83 static dirent* CopyDirent(dirent* original) {
84 // Allocate the minimum number of bytes necessary, rounded up to a 4-byte boundary.
85 size_t size = ((original->d_reclen + 3) & ~3);
86 dirent* copy = reinterpret_cast<dirent*>(malloc(size));
87 memcpy(copy, original, original->d_reclen);
91 DISALLOW_COPY_AND_ASSIGN(ScandirResult);
94 int scandir(const char* dirname, dirent*** name_list,
95 int (*filter)(const dirent*),
96 int (*comparator)(const dirent**, const dirent**)) {
97 ScopedReaddir reader(dirname);
104 while ((entry = reader.ReadEntry()) != NULL) {
105 // If we have a filter, skip names that don't match.
106 if (filter != NULL && !(*filter)(entry)) {
112 names.Sort(comparator);
114 size_t size = names.size();
115 *name_list = names.release();
118 __strong_alias(scandir64, scandir);