1/******************************************************************************
2 *   Copyright (C) 2009, International Business Machines
3 *   Corporation and others.  All Rights Reserved.
4 *******************************************************************************
5 */
6
7#include "filetools.h"
8#include "filestrm.h"
9#include "cstring.h"
10#include "unicode/putil.h"
11
12#include <stdio.h>
13#include <stdlib.h>
14#include <sys/stat.h>
15#include <time.h>
16#include <string.h>
17
18#if U_HAVE_DIRENT_H
19#include <dirent.h>
20typedef struct dirent DIRENT;
21
22#define MAX_PATH_SIZE 4096 /* Set the limit for the size of the path. */
23
24#define SKIP1 "."
25#define SKIP2 ".."
26#endif
27
28static int32_t whichFileModTimeIsLater(const char *file1, const char *file2);
29
30/*
31 * Goes through the given directory recursive to compare each file's modification time with that of the file given.
32 * Also can be given just one file to check against. Default value for isDir is FALSE.
33 */
34U_CAPI UBool U_EXPORT2
35isFileModTimeLater(const char *filePath, const char *checkAgainst, UBool isDir) {
36    UBool isLatest = TRUE;
37
38    if (filePath == NULL || checkAgainst == NULL) {
39        return FALSE;
40    }
41
42    if (isDir == TRUE) {
43#if U_HAVE_DIRENT_H
44        DIR *pDir = NULL;
45        if ((pDir= opendir(checkAgainst)) != NULL) {
46            DIR *subDirp = NULL;
47            DIRENT *dirEntry = NULL;
48
49            while ((dirEntry = readdir(pDir)) != NULL) {
50                if (uprv_strcmp(dirEntry->d_name, SKIP1) != 0 && uprv_strcmp(dirEntry->d_name, SKIP2) != 0) {
51                    char newpath[MAX_PATH_SIZE] = "";
52                    uprv_strcpy(newpath, checkAgainst);
53                    uprv_strcat(newpath, U_FILE_SEP_STRING);
54                    uprv_strcat(newpath, dirEntry->d_name);
55
56                    if ((subDirp = opendir(newpath)) != NULL) {
57                        /* If this new path is a directory, make a recursive call with the newpath. */
58                        closedir(subDirp);
59                        isLatest = isFileModTimeLater(filePath, newpath, isDir);
60                        if (!isLatest) {
61                            break;
62                        }
63                    } else {
64                        int32_t latest = whichFileModTimeIsLater(filePath, newpath);
65                        if (latest < 0 || latest == 2) {
66                            isLatest = FALSE;
67                            break;
68                        }
69                    }
70
71                }
72            }
73            closedir(pDir);
74        } else {
75            fprintf(stderr, "Unable to open directory: %s\n", checkAgainst);
76            return FALSE;
77        }
78#endif
79    } else {
80        if (T_FileStream_file_exists(checkAgainst)) {
81            int32_t latest = whichFileModTimeIsLater(filePath, checkAgainst);
82            if (latest < 0 || latest == 2) {
83                isLatest = FALSE;
84            }
85        } else {
86            isLatest = FALSE;
87        }
88    }
89
90    return isLatest;
91}
92
93/* Compares the mod time of both files returning a number indicating which one is later. -1 if error ocurs. */
94static int32_t whichFileModTimeIsLater(const char *file1, const char *file2) {
95    int32_t result = 0;
96    struct stat stbuf1, stbuf2;
97
98    if (stat(file1, &stbuf1) == 0 && stat(file2, &stbuf2) == 0) {
99        time_t modtime1, modtime2;
100        double diff;
101
102        modtime1 = stbuf1.st_mtime;
103        modtime2 = stbuf2.st_mtime;
104
105        diff = difftime(modtime1, modtime2);
106        if (diff < 0.0) {
107            result = 2;
108        } else if (diff > 0.0) {
109            result = 1;
110        }
111
112    } else {
113        fprintf(stderr, "Unable to get stats from file: %s or %s\n", file1, file2);
114        result = -1;
115    }
116
117    return result;
118}
119
120/* Swap the file separater character given with the new one in the file path. */
121U_CAPI void U_EXPORT2
122swapFileSepChar(char *filePath, const char oldFileSepChar, const char newFileSepChar) {
123    for (int32_t i = 0, length = uprv_strlen(filePath); i < length; i++) {
124        filePath[i] = (filePath[i] == oldFileSepChar ) ? newFileSepChar : filePath[i];
125    }
126}
127