system_cmds-643.30.1.tar.gz

[apple/system_cmds.git] / CPPUtil / UtilPath.cpp

diff --git a/CPPUtil/UtilPath.cpp b/CPPUtil/UtilPath.cpp
new file mode 100644 (file)
index 0000000..f08ff24
--- /dev/null
+++ b/CPPUtil/UtilPath.cpp
@@ -0,0 +1,92 @@
+//
+//  UtilPath.inline.hpp
+//  CPPUtil
+//
+//  Created by James McIlree on 4/8/13.
+//  Copyright (c) 2013 Apple. All rights reserved.
+//
+
+#include "CPPUtil.h"
+
+#include <sys/stat.h>
+
+BEGIN_UTIL_NAMESPACE
+
+std::string Path::basename(const char* path) {
+       size_t length = strlen(path);
+
+       /*
+        * case: ""
+        * case: "/"
+        * case: [any-single-character-paths]
+        */
+       if (length < 2)
+               return std::string(path);
+
+       char temp[PATH_MAX];
+       char* temp_cursor = &temp[PATH_MAX - 1];
+       char* temp_end = temp_cursor;
+       *temp_end = 0; // NULL terminate
+
+       const char* path_cursor = &path[length-1];
+
+       while (path_cursor >= path) {
+               if (*path_cursor == '/') {
+                       // If we have copied one or more chars, we're done
+                       if (temp_cursor != temp_end)
+                               return std::string(temp_cursor);
+               } else {
+                       *(--temp_cursor) = *path_cursor;
+               }
+
+               // Is the temp buffer full?
+               if (temp_cursor == temp)
+                       return std::string(temp);
+
+               --path_cursor;
+       }
+
+       if (path[0] == '/' && temp_cursor == temp_end) {
+               *(--temp_cursor) = '/';
+       }
+
+       return std::string(temp_cursor);
+}
+
+std::string Path::basename(std::string& path) {
+       return basename(path.c_str());
+}
+
+bool Path::exists(const char *path) {
+       struct stat statinfo;
+       return lstat(path, &statinfo) == 0;
+}
+
+bool Path::exists(std::string& path) {
+       return exists(path.c_str());
+}
+
+bool Path::is_file(const char* path, bool should_resolve_symlinks) {
+       struct stat statinfo;
+       if (should_resolve_symlinks) {
+               if (stat(path, &statinfo) == 0) {
+                       if (S_ISREG(statinfo.st_mode)) {
+                               return true;
+                       }
+               }
+       } else {
+               if (lstat(path, &statinfo) == 0) {
+                       if (S_ISREG(statinfo.st_mode)) {
+                               return true;
+                       }
+               }
+       }
+
+       return false;
+}
+
+bool Path::is_file(std::string& path, bool should_resolve_symlinks) {
+       return is_file(path.c_str(), should_resolve_symlinks);
+}
+
+END_UTIL_NAMESPACE