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icu46/source/tools/toolutil/filetools.cpp

+/******************************************************************************
+ *   Copyright (C) 2009, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ */
+
+#include "filetools.h"
+#include "filestrm.h"
+#include "cstring.h"
+#include "unicode/putil.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 MAX_PATH_SIZE 4096 /* Set the limit for the size of the path. */
+
+#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 == NULL || checkAgainst == NULL) {
+        return FALSE;
+    }
+
+    if (isDir == TRUE) {
+#if U_HAVE_DIRENT_H
+        DIR *pDir = NULL;
+        if ((pDir= opendir(checkAgainst)) != NULL) {
+            DIR *subDirp = NULL;
+            DIRENT *dirEntry = NULL;
+
+            while ((dirEntry = readdir(pDir)) != NULL) {
+                if (uprv_strcmp(dirEntry->d_name, SKIP1) != 0 && uprv_strcmp(dirEntry->d_name, SKIP2) != 0) {
+                    char newpath[MAX_PATH_SIZE] = "";
+                    uprv_strcpy(newpath, checkAgainst);
+                    uprv_strcat(newpath, U_FILE_SEP_STRING);
+                    uprv_strcat(newpath, dirEntry->d_name);
+
+                    if ((subDirp = opendir(newpath)) != NULL) {
+                        /* If this new path is a directory, make a recursive call with the newpath. */
+                        closedir(subDirp);
+                        isLatest = isFileModTimeLater(filePath, newpath, isDir);
+                        if (!isLatest) {
+                            break;
+                        }
+                    } else {
+                        int32_t latest = whichFileModTimeIsLater(filePath, newpath);
+                        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 = uprv_strlen(filePath); i < length; i++) {
+        filePath[i] = (filePath[i] == oldFileSepChar ) ? newFileSepChar : filePath[i];
+    }
+}