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-rw-r--r--indra/llvfs/lldir_win32.cpp2
-rw-r--r--indra/llvfs/lldiriterator.cpp203
-rw-r--r--indra/llvfs/lldiriterator.h87
3 files changed, 291 insertions, 1 deletions
diff --git a/indra/llvfs/lldir_win32.cpp b/indra/llvfs/lldir_win32.cpp
index 33718e520d..b9a3995e25 100644
--- a/indra/llvfs/lldir_win32.cpp
+++ b/indra/llvfs/lldir_win32.cpp
@@ -249,7 +249,7 @@ BOOL LLDir_Win32::getNextFileInDir(const std::string &dirname, const std::string
if (pathname != mCurrentDir)
{
// different dir specified, close old search
- if (mCurrentDir[0])
+ if (!mCurrentDir.empty())
{
FindClose(mDirSearch_h);
}
diff --git a/indra/llvfs/lldiriterator.cpp b/indra/llvfs/lldiriterator.cpp
new file mode 100644
index 0000000000..5536ed8f69
--- /dev/null
+++ b/indra/llvfs/lldiriterator.cpp
@@ -0,0 +1,203 @@
+/**
+ * @file lldiriterator.cpp
+ * @brief Iterator through directory entries matching the search pattern.
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#include "lldiriterator.h"
+
+#include <boost/filesystem.hpp>
+#include <boost/regex.hpp>
+
+namespace fs = boost::filesystem;
+
+static std::string glob_to_regex(const std::string& glob);
+
+class LLDirIterator::Impl
+{
+public:
+ Impl(const std::string &dirname, const std::string &mask);
+ ~Impl();
+
+ bool next(std::string &fname);
+
+private:
+ boost::regex mFilterExp;
+ fs::directory_iterator mIter;
+ bool mIsValid;
+};
+
+LLDirIterator::Impl::Impl(const std::string &dirname, const std::string &mask)
+ : mIsValid(false)
+{
+ fs::path dir_path(dirname);
+
+ // Check if path exists.
+ if (!fs::exists(dir_path))
+ {
+ llerrs << "Invalid path: \"" << dir_path.string() << "\"" << llendl;
+ return;
+ }
+
+ // Initialize the directory iterator for the given path.
+ try
+ {
+ mIter = fs::directory_iterator(dir_path);
+ }
+ catch (fs::basic_filesystem_error<fs::path>& e)
+ {
+ llerrs << e.what() << llendl;
+ return;
+ }
+
+ // Convert the glob mask to a regular expression
+ std::string exp = glob_to_regex(mask);
+
+ // Initialize boost::regex with the expression converted from
+ // the glob mask.
+ // An exception is thrown if the expression is not valid.
+ try
+ {
+ mFilterExp.assign(exp);
+ }
+ catch (boost::regex_error& e)
+ {
+ llerrs << "\"" << exp << "\" is not a valid regular expression: "
+ << e.what() << llendl;
+ return;
+ }
+
+ mIsValid = true;
+}
+
+LLDirIterator::Impl::~Impl()
+{
+}
+
+bool LLDirIterator::Impl::next(std::string &fname)
+{
+ fname = "";
+
+ if (!mIsValid)
+ {
+ llerrs << "The iterator is not correctly initialized." << llendl;
+ return false;
+ }
+
+ fs::directory_iterator end_itr; // default construction yields past-the-end
+ bool found = false;
+ while (mIter != end_itr && !found)
+ {
+ boost::smatch match;
+ std::string name = mIter->path().filename();
+ if (found = boost::regex_match(name, match, mFilterExp))
+ {
+ fname = name;
+ }
+
+ ++mIter;
+ }
+
+ return found;
+}
+
+std::string glob_to_regex(const std::string& glob)
+{
+ std::string regex;
+ regex.reserve(glob.size()<<1);
+ S32 braces = 0;
+ bool escaped = false;
+ bool square_brace_open = false;
+
+ for (std::string::const_iterator i = glob.begin(); i != glob.end(); ++i)
+ {
+ char c = *i;
+
+ switch (c)
+ {
+ case '.':
+ regex+="\\.";
+ break;
+ case '*':
+ if (glob.begin() == i)
+ {
+ regex+="[^.].*";
+ }
+ else
+ {
+ regex+= escaped ? "*" : ".*";
+ }
+ break;
+ case '?':
+ regex+= escaped ? '?' : '.';
+ break;
+ case '{':
+ braces++;
+ regex+='(';
+ break;
+ case '}':
+ if (!braces)
+ {
+ llerrs << "glob_to_regex: Closing brace without an equivalent opening brace: " << glob << llendl;
+ }
+
+ regex+=')';
+ braces--;
+ break;
+ case ',':
+ regex+= braces ? '|' : c;
+ break;
+ case '!':
+ regex+= square_brace_open ? '^' : c;
+ break;
+ default:
+ regex+=c;
+ break;
+ }
+
+ escaped = ('\\' == c);
+ square_brace_open = ('[' == c);
+ }
+
+ if (braces)
+ {
+ llerrs << "glob_to_regex: Unterminated brace expression: " << glob << llendl;
+ }
+
+ return regex;
+}
+
+LLDirIterator::LLDirIterator(const std::string &dirname, const std::string &mask)
+{
+ mImpl = new Impl(dirname, mask);
+}
+
+LLDirIterator::~LLDirIterator()
+{
+ delete mImpl;
+}
+
+bool LLDirIterator::next(std::string &fname)
+{
+ return mImpl->next(fname);
+}
diff --git a/indra/llvfs/lldiriterator.h b/indra/llvfs/lldiriterator.h
new file mode 100644
index 0000000000..0b48be41b3
--- /dev/null
+++ b/indra/llvfs/lldiriterator.h
@@ -0,0 +1,87 @@
+/**
+ * @file lldiriterator.h
+ * @brief Iterator through directory entries matching the search pattern.
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLDIRITERATOR_H
+#define LL_LLDIRITERATOR_H
+
+#include "linden_common.h"
+
+/**
+ * Class LLDirIterator
+ *
+ * Iterates through directory entries matching the search pattern.
+ */
+class LLDirIterator
+{
+public:
+ /**
+ * Constructs LLDirIterator object to search for glob pattern
+ * matches in a directory.
+ *
+ * @param dirname - name of a directory to search in.
+ * @param mask - search pattern, a glob expression
+ *
+ * Wildcards supported in glob expressions:
+ * --------------------------------------------------------------
+ * | Wildcard | Matches |
+ * --------------------------------------------------------------
+ * | * |zero or more characters |
+ * | ? |exactly one character |
+ * | [abcde] |exactly one character listed |
+ * | [a-e] |exactly one character in the given range |
+ * | [!abcde] |any character that is not listed |
+ * | [!a-e] |any character that is not in the given range |
+ * | {abc,xyz} |exactly one entire word in the options given |
+ * --------------------------------------------------------------
+ */
+ LLDirIterator(const std::string &dirname, const std::string &mask);
+
+ ~LLDirIterator();
+
+ /**
+ * Searches for the next directory entry matching the glob mask
+ * specified upon iterator construction.
+ * Returns true if a match is found, sets fname
+ * parameter to the name of the matched directory entry and
+ * increments the iterator position.
+ *
+ * Typical usage:
+ * <code>
+ * LLDirIterator iter(directory, pattern);
+ * if ( iter.next(scanResult) )
+ * </code>
+ *
+ * @param fname - name of the matched directory entry.
+ * @return true if a match is found, false otherwise.
+ */
+ bool next(std::string &fname);
+
+protected:
+ class Impl;
+ Impl* mImpl;
+};
+
+#endif //LL_LLDIRITERATOR_H
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