1 //
2 // Copyright 2011 The Android Open Source Project
3 //
4
5 // File Finder implementation.
6 // Implementation for the functions declared and documented in FileFinder.h
7
8 #include <androidfw/PathUtils.h>
9 #include <utils/Vector.h>
10 #include <utils/String8.h>
11 #include <utils/KeyedVector.h>
12
13 #include <dirent.h>
14 #include <sys/stat.h>
15
16 #include "DirectoryWalker.h"
17 #include "FileFinder.h"
18
19 //#define DEBUG
20
21 using android::String8;
22
23 // Private function to check whether a file is a directory or not
isDirectory(const char * filename)24 bool isDirectory(const char* filename) {
25 struct stat fileStat;
26 if (stat(filename, &fileStat) == -1) {
27 return false;
28 }
29 return(S_ISDIR(fileStat.st_mode));
30 }
31
32
33 // Private function to check whether a file is a regular file or not
isFile(const char * filename)34 bool isFile(const char* filename) {
35 struct stat fileStat;
36 if (stat(filename, &fileStat) == -1) {
37 return false;
38 }
39 return(S_ISREG(fileStat.st_mode));
40 }
41
findFiles(String8 basePath,Vector<String8> & extensions,KeyedVector<String8,time_t> & fileStore,DirectoryWalker * dw)42 bool SystemFileFinder::findFiles(String8 basePath, Vector<String8>& extensions,
43 KeyedVector<String8,time_t>& fileStore,
44 DirectoryWalker* dw)
45 {
46 // Scan the directory pointed to by basePath
47 // check files and recurse into subdirectories.
48 if (!dw->openDir(basePath)) {
49 return false;
50 }
51 /*
52 * Go through all directory entries. Check each file using checkAndAddFile
53 * and recurse into sub-directories.
54 */
55 struct dirent* entry;
56 while ((entry = dw->nextEntry()) != NULL) {
57 String8 entryName(entry->d_name);
58 if (entry->d_name[0] == '.') // Skip hidden files and directories
59 continue;
60
61 String8 fullPath = appendPathCopy(basePath, entryName);
62 // If this entry is a directory we'll recurse into it
63 if (isDirectory(fullPath.c_str()) ) {
64 DirectoryWalker* copy = dw->clone();
65 findFiles(fullPath, extensions, fileStore,copy);
66 delete copy;
67 }
68
69 // If this entry is a file, we'll pass it over to checkAndAddFile
70 if (isFile(fullPath.c_str()) ) {
71 checkAndAddFile(fullPath,dw->entryStats(),extensions,fileStore);
72 }
73 }
74
75 // Clean up
76 dw->closeDir();
77
78 return true;
79 }
80
checkAndAddFile(const String8 & path,const struct stat * stats,Vector<String8> & extensions,KeyedVector<String8,time_t> & fileStore)81 void SystemFileFinder::checkAndAddFile(const String8& path, const struct stat* stats,
82 Vector<String8>& extensions,
83 KeyedVector<String8,time_t>& fileStore)
84 {
85 // Loop over the extensions, checking for a match
86 bool done = false;
87 String8 ext(getPathExtension(path));
88 ext.toLower();
89 for (size_t i = 0; i < extensions.size() && !done; ++i) {
90 String8 ext2 = getPathExtension(extensions[i]);
91 ext2.toLower();
92 // Compare the extensions. If a match is found, add to storage.
93 if (ext == ext2) {
94 done = true;
95 fileStore.add(path,stats->st_mtime);
96 }
97 }
98 }
99
100