From f87ae01d3b409ddd4fb619bf3221bdcea7a77cf0 Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Wed, 18 Feb 2015 21:18:20 -0500
Subject: [PATCH] Removed mmap.h dependency. Close #1.

---
 lint/mmap.h     | 149 ------------------------------------------------
 lint/peglint.cc |  23 ++++++--
 peglib.h        |   1 +
 3 files changed, 18 insertions(+), 155 deletions(-)
 delete mode 100644 lint/mmap.h

diff --git a/lint/mmap.h b/lint/mmap.h
deleted file mode 100644
index e19333c..0000000
--- a/lint/mmap.h
+++ /dev/null
@@ -1,149 +0,0 @@
-
-#ifndef _MMAP_H_
-#define _MMAP_H_
-
-#if defined(_MSC_VER)
-#include <windows.h>
-#else
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#endif
-
-class MemoryMappedFile
-{
-public:
-    MemoryMappedFile(const char* path);
-    ~MemoryMappedFile();
-
-    bool is_open() const;
-    size_t size() const;
-    const char* data() const;
-
-private:
-    void cleanup();
-
-#if defined(_MSC_VER)
-    HANDLE hFile_;
-    HANDLE hMapping_;
-#else
-    int    fd_;
-#endif
-    size_t size_;
-    void*  addr_;
-};
-
-#if defined(_MSC_VER)
-#define MAP_FAILED NULL
-#endif
-
-inline MemoryMappedFile::MemoryMappedFile(const char* path)
-#if defined(_MSC_VER)
-    : hFile_(NULL)
-    , hMapping_(NULL)
-#else
-    : fd_(-1)
-#endif
-    , size_(0)
-    , addr_(MAP_FAILED)
-{
-#if defined(_MSC_VER)
-    hFile_ = ::CreateFileA(
-        path,
-        GENERIC_READ,
-        FILE_SHARE_READ,
-        NULL,
-        OPEN_EXISTING,
-        FILE_ATTRIBUTE_NORMAL,
-        NULL);
-
-    if (hFile_ == INVALID_HANDLE_VALUE) {
-        std::runtime_error("");
-    }
-
-    size_ = ::GetFileSize(hFile_, NULL);
-
-    hMapping_ = ::CreateFileMapping(hFile_, NULL, PAGE_READONLY, 0, 0, NULL);
-
-    if (hMapping_ == NULL) {
-        cleanup();
-        std::runtime_error("");
-    }
-
-    addr_ = ::MapViewOfFile(hMapping_, FILE_MAP_READ, 0, 0, 0);
-#else
-    fd_ = open(path, O_RDONLY);
-    if (fd_ == -1) {
-        std::runtime_error("");
-    }
-
-    struct stat sb;
-    if (fstat(fd_, &sb) == -1) {
-        cleanup();
-        std::runtime_error("");
-    }
-    size_ = sb.st_size;
-
-    addr_ = mmap(NULL, size_, PROT_READ, MAP_PRIVATE, fd_, 0);
-#endif
-
-    if (addr_ == MAP_FAILED) {
-        cleanup();
-        std::runtime_error("");
-    }
-}
-
-inline MemoryMappedFile::~MemoryMappedFile()
-{
-    cleanup();
-}
-
-inline bool MemoryMappedFile::is_open() const
-{
-    return addr_ != MAP_FAILED;
-}
-
-inline size_t MemoryMappedFile::size() const
-{
-    return size_;
-}
-
-inline const char* MemoryMappedFile::data() const
-{
-    return (const char*)addr_;
-}
-
-inline void MemoryMappedFile::cleanup()
-{
-#if defined(_MSC_VER)
-    if (addr_) {
-        ::UnmapViewOfFile(addr_);
-        addr_ = MAP_FAILED;
-    }
-
-    if (hMapping_) {
-        ::CloseHandle(hMapping_);
-        hMapping_ = NULL;
-    }
-
-    if (hFile_ != INVALID_HANDLE_VALUE) {
-        ::CloseHandle(hFile_);
-        hFile_ = INVALID_HANDLE_VALUE;
-    }
-#else
-    if (addr_ != MAP_FAILED) {
-        munmap(addr_, size_);
-        addr_ = MAP_FAILED;
-    }
-
-    if (fd_ != -1) {
-        close(fd_);
-        fd_ = -1;
-    }
-#endif
-}
-
-#endif // _MMAP_H_
-
-// vim: et ts=4 sw=4 cin cino={1s ff=unix
diff --git a/lint/peglint.cc b/lint/peglint.cc
index 1436554..586c175 100644
--- a/lint/peglint.cc
+++ b/lint/peglint.cc
@@ -6,11 +6,22 @@
 //
 
 #include <peglib.h>
-#include <iostream>
-#include "mmap.h"
+#include <fstream>
 
 using namespace std;
 
+bool read_file(const char* path, vector<char>& buff)
+{
+    ifstream ifs(path, ios::in | ios::binary);
+    if (ifs.fail()) {
+        return false;
+    }
+
+    buff.resize(ifs.seekg(0, ios::end).tellg());
+    ifs.seekg(0, ios::beg).read(&buff[0], static_cast<streamsize>(buff.size()));
+    return true;
+}
+
 int main(int argc, const char** argv)
 {
     if (argc < 2 || string("--help") == argv[1]) {
@@ -21,8 +32,8 @@ int main(int argc, const char** argv)
     // Check PEG grammar
     auto syntax_path = argv[1];
 
-    MemoryMappedFile syntax(syntax_path);
-    if (!syntax.is_open()) {
+    vector<char> syntax;
+    if (!read_file(syntax_path, syntax)) {
         cerr << "can't open the grammar file." << endl;
         return -1;
     }
@@ -42,8 +53,8 @@ int main(int argc, const char** argv)
     // Check source
     auto source_path = argv[2];
 
-    MemoryMappedFile source(source_path);
-    if (!source.is_open()) {
+    vector<char> source;
+    if (!read_file(source_path, source)) {
         cerr << "can't open the source file." << endl;
         return -1;
     }
diff --git a/peglib.h b/peglib.h
index 823e9b8..8114099 100644
--- a/peglib.h
+++ b/peglib.h
@@ -10,6 +10,7 @@
 
 #include <functional>
 #include <string>
+#include <limits>
 #include <memory>
 #include <vector>
 #include <map>