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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /******************************************************************************
4  *   Copyright (C) 2009-2013, International Business Machines
5  *   Corporation and others.  All Rights Reserved.
6  *******************************************************************************
7  */
8 
9 #include "unicode/platform.h"
10 #if U_PLATFORM == U_PF_MINGW
11 // *cough* - for struct stat
12 #ifdef __STRICT_ANSI__
13 #undef __STRICT_ANSI__
14 #endif
15 #endif
16 
17 #include "filetools.h"
18 #include "filestrm.h"
19 #include "charstr.h"
20 #include "cstring.h"
21 #include "unicode/putil.h"
22 #include "putilimp.h"
23 
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <sys/stat.h>
27 #include <time.h>
28 #include <string.h>
29 
30 #if U_HAVE_DIRENT_H
31 #include <dirent.h>
32 typedef struct dirent DIRENT;
33 
34 #define SKIP1 "."
35 #define SKIP2 ".."
36 #endif
37 
38 static int32_t whichFileModTimeIsLater(const char *file1, const char *file2);
39 
40 /*
41  * Goes through the given directory recursive to compare each file's modification time with that of the file given.
42  * Also can be given just one file to check against. Default value for isDir is FALSE.
43  */
44 U_CAPI UBool U_EXPORT2
isFileModTimeLater(const char * filePath,const char * checkAgainst,UBool isDir)45 isFileModTimeLater(const char *filePath, const char *checkAgainst, UBool isDir) {
46     UBool isLatest = TRUE;
47 
48     if (filePath == NULL || checkAgainst == NULL) {
49         return FALSE;
50     }
51 
52     if (isDir == TRUE) {
53 #if U_HAVE_DIRENT_H
54         DIR *pDir = NULL;
55         if ((pDir= opendir(checkAgainst)) != NULL) {
56             DIR *subDirp = NULL;
57             DIRENT *dirEntry = NULL;
58 
59             while ((dirEntry = readdir(pDir)) != NULL) {
60                 if (uprv_strcmp(dirEntry->d_name, SKIP1) != 0 && uprv_strcmp(dirEntry->d_name, SKIP2) != 0) {
61                     UErrorCode status = U_ZERO_ERROR;
62                     icu::CharString newpath(checkAgainst, -1, status);
63                     newpath.append(U_FILE_SEP_STRING, -1, status);
64                     newpath.append(dirEntry->d_name, -1, status);
65                     if (U_FAILURE(status)) {
66                         fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, u_errorName(status));
67                         return FALSE;
68                     };
69 
70                     if ((subDirp = opendir(newpath.data())) != NULL) {
71                         /* If this new path is a directory, make a recursive call with the newpath. */
72                         closedir(subDirp);
73                         isLatest = isFileModTimeLater(filePath, newpath.data(), isDir);
74                         if (!isLatest) {
75                             break;
76                         }
77                     } else {
78                         int32_t latest = whichFileModTimeIsLater(filePath, newpath.data());
79                         if (latest < 0 || latest == 2) {
80                             isLatest = FALSE;
81                             break;
82                         }
83                     }
84 
85                 }
86             }
87             closedir(pDir);
88         } else {
89             fprintf(stderr, "Unable to open directory: %s\n", checkAgainst);
90             return FALSE;
91         }
92 #endif
93     } else {
94         if (T_FileStream_file_exists(checkAgainst)) {
95             int32_t latest = whichFileModTimeIsLater(filePath, checkAgainst);
96             if (latest < 0 || latest == 2) {
97                 isLatest = FALSE;
98             }
99         } else {
100             isLatest = FALSE;
101         }
102     }
103 
104     return isLatest;
105 }
106 
107 /* Compares the mod time of both files returning a number indicating which one is later. -1 if error ocurs. */
whichFileModTimeIsLater(const char * file1,const char * file2)108 static int32_t whichFileModTimeIsLater(const char *file1, const char *file2) {
109     int32_t result = 0;
110     struct stat stbuf1, stbuf2;
111 
112     if (stat(file1, &stbuf1) == 0 && stat(file2, &stbuf2) == 0) {
113         time_t modtime1, modtime2;
114         double diff;
115 
116         modtime1 = stbuf1.st_mtime;
117         modtime2 = stbuf2.st_mtime;
118 
119         diff = difftime(modtime1, modtime2);
120         if (diff < 0.0) {
121             result = 2;
122         } else if (diff > 0.0) {
123             result = 1;
124         }
125 
126     } else {
127         fprintf(stderr, "Unable to get stats from file: %s or %s\n", file1, file2);
128         result = -1;
129     }
130 
131     return result;
132 }
133 
134 /* Swap the file separater character given with the new one in the file path. */
135 U_CAPI void U_EXPORT2
swapFileSepChar(char * filePath,const char oldFileSepChar,const char newFileSepChar)136 swapFileSepChar(char *filePath, const char oldFileSepChar, const char newFileSepChar) {
137     for (int32_t i = 0, length = static_cast<int32_t>(uprv_strlen(filePath)); i < length; i++) {
138         filePath[i] = (filePath[i] == oldFileSepChar ) ? newFileSepChar : filePath[i];
139     }
140 }
141