1 files changed, 140 insertions, 0 deletions
diff --git a/intl/icu/source/tools/toolutil/filetools.cpp b/intl/icu/source/tools/toolutil/filetools.cpp
new file mode 100644
index 0000000000..994d8e31f0
--- /dev/null
+++ b/intl/icu/source/tools/toolutil/filetools.cpp
@@ -0,0 +1,140 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/******************************************************************************
+ *   Copyright (C) 2009-2013, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ */
+
+#include "unicode/platform.h"
+#if U_PLATFORM == U_PF_MINGW
+// *cough* - for struct stat
+#ifdef __STRICT_ANSI__
+#undef __STRICT_ANSI__
+#endif
+#endif
+
+#include "filetools.h"
+#include "filestrm.h"
+#include "charstr.h"
+#include "cstring.h"
+#include "unicode/putil.h"
+#include "putilimp.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <string.h>
+
+#if U_HAVE_DIRENT_H
+#include <dirent.h>
+typedef struct dirent DIRENT;
+
+#define SKIP1 "."
+#define SKIP2 ".."
+#endif
+
+static int32_t whichFileModTimeIsLater(const char *file1, const char *file2);
+
+/*
+ * Goes through the given directory recursive to compare each file's modification time with that of the file given.
+ * Also can be given just one file to check against. Default value for isDir is false.
+ */
+U_CAPI UBool U_EXPORT2
+isFileModTimeLater(const char *filePath, const char *checkAgainst, UBool isDir) {
+    UBool isLatest = true;
+
+    if (filePath == nullptr || checkAgainst == nullptr) {
+        return false;
+    }
+
+    if (isDir == true) {
+#if U_HAVE_DIRENT_H
+        DIR *pDir = nullptr;
+        if ((pDir= opendir(checkAgainst)) != nullptr) {
+            DIR *subDirp = nullptr;
+            DIRENT *dirEntry = nullptr;
+
+            while ((dirEntry = readdir(pDir)) != nullptr) {
+                if (uprv_strcmp(dirEntry->d_name, SKIP1) != 0 && uprv_strcmp(dirEntry->d_name, SKIP2) != 0) {
+                    UErrorCode status = U_ZERO_ERROR;
+                    icu::CharString newpath(checkAgainst, -1, status);
+                    newpath.append(U_FILE_SEP_STRING, -1, status);
+                    newpath.append(dirEntry->d_name, -1, status);
+                    if (U_FAILURE(status)) {
+                        fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, u_errorName(status));
+                        return false;
+                    }
+
+                    if ((subDirp = opendir(newpath.data())) != nullptr) {
+                        /* If this new path is a directory, make a recursive call with the newpath. */
+                        closedir(subDirp);
+                        isLatest = isFileModTimeLater(filePath, newpath.data(), isDir);
+                        if (!isLatest) {
+                            break;
+                        }
+                    } else {
+                        int32_t latest = whichFileModTimeIsLater(filePath, newpath.data());
+                        if (latest < 0 || latest == 2) {
+                            isLatest = false;
+                            break;
+                        }
+                    }
+
+                }
+            }
+            closedir(pDir);
+        } else {
+            fprintf(stderr, "Unable to open directory: %s\n", checkAgainst);
+            return false;
+        }
+#endif
+    } else {
+        if (T_FileStream_file_exists(checkAgainst)) {
+            int32_t latest = whichFileModTimeIsLater(filePath, checkAgainst);
+            if (latest < 0 || latest == 2) {
+                isLatest = false;
+            }
+        } else {
+            isLatest = false;
+        }
+    }
+
+    return isLatest;
+}
+
+/* Compares the mod time of both files returning a number indicating which one is later. -1 if error ocurs. */
+static int32_t whichFileModTimeIsLater(const char *file1, const char *file2) {
+    int32_t result = 0;
+    struct stat stbuf1, stbuf2;
+
+    if (stat(file1, &stbuf1) == 0 && stat(file2, &stbuf2) == 0) {
+        time_t modtime1, modtime2;
+        double diff;
+
+        modtime1 = stbuf1.st_mtime;
+        modtime2 = stbuf2.st_mtime;
+
+        diff = difftime(modtime1, modtime2);
+        if (diff < 0.0) {
+            result = 2;
+        } else if (diff > 0.0) {
+            result = 1;
+        }
+
+    } else {
+        fprintf(stderr, "Unable to get stats from file: %s or %s\n", file1, file2);
+        result = -1;
+    }
+
+    return result;
+}
+
+/* Swap the file separater character given with the new one in the file path. */
+U_CAPI void U_EXPORT2
+swapFileSepChar(char *filePath, const char oldFileSepChar, const char newFileSepChar) {
+    for (int32_t i = 0, length = static_cast<int32_t>(uprv_strlen(filePath)); i < length; i++) {
+        filePath[i] = (filePath[i] == oldFileSepChar ) ? newFileSepChar : filePath[i];
+    }
+}