Fix typo in grammar.

Add lexertl.
2013-05-31 21:35:44 +02:00
parent 7be9545e02
commit f3d3389f54
44 changed files with 12465 additions and 2 deletions
--- a/inc/lexertl/memory_file.hpp
+++ b/inc/lexertl/memory_file.hpp
@@ -0,0 +1,112 @@
+// memory_file.hpp
+// Copyright (c) 2012 Ben Hanson (http://www.benhanson.net/)
+// Inspired by http://en.wikibooks.org/wiki/Optimizing_C%2B%2B/General_optimization_techniques/Input/Output#Memory-mapped_file
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef LEXERTL_MEMORY_FILE_H
+#define LEXERTL_MEMORY_FILE_H
+
+#ifdef __unix__
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#elif defined _WIN32
+#include <windows.h>
+#endif
+
+// Only files small enough to fit into memory are supported.
+namespace lexertl
+{
+template<typename CharT>
+class basic_memory_file
+{
+public:
+    basic_memory_file (const char *pathname_) :
+        _data (0),
+        _size (0)
+    {
+#ifdef __unix__
+        _fh = ::open (pathname_, O_RDONLY);
+
+        if (_fh > -1)
+        {
+            struct stat sbuf_;
+
+            if (::fstat (_fh, &sbuf_) > -1)
+            {
+                _data = static_cast<const CharT *>
+                    (::mmap (0, sbuf_.st_size, PROT_READ, MAP_SHARED, _fh, 0));
+
+                if (_data == MAP_FAILED)
+                {
+                    _data = 0;
+                }
+                else
+                {
+                    _size = sbuf_.st_size;
+                }
+            }
+        }
+#elif defined _WIN32
+        _fh = ::CreateFileA (pathname_, GENERIC_READ, FILE_SHARE_READ, 0,
+            OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
+        _fmh = 0;
+
+        if (_fh != INVALID_HANDLE_VALUE)
+        {
+            _fmh = ::CreateFileMapping (_fh, 0, PAGE_READONLY, 0, 0, 0);
+
+            if (_fmh != 0)
+            {
+                _data = static_cast<CharT *>(::MapViewOfFile
+                    (_fmh, FILE_MAP_READ, 0, 0, 0));
+
+                if (_data) _size = ::GetFileSize(_fh, 0);
+            }
+        }
+#endif
+    }
+
+    ~basic_memory_file ()
+    {
+#if defined(__unix__)
+        ::munmap(const_cast<CharT *>(_data), _size);
+        ::close(_fh);
+#elif defined(_WIN32)
+        ::UnmapViewOfFile(_data);
+        ::CloseHandle(_fmh);
+        ::CloseHandle(_fh);
+#endif
+    }
+
+    const CharT *data () const
+    {
+        return _data;
+    }
+
+    std::size_t size () const
+    {
+        return _size;
+    }
+
+private:
+    const CharT *_data;
+    std::size_t _size;
+#ifdef __unix__
+    int _fh;
+#elif defined _WIN32
+    HANDLE _fh;
+    HANDLE _fmh;
+#else
+    #error Only Posix or Windows are supported.
+#endif
+};
+
+typedef basic_memory_file<char> memory_file;
+typedef basic_memory_file<wchar_t> wmemory_file;
+}
+
+#endif