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#if (defined _WIN32) || (defined _WIN64)
#include <sys/types.h>
#include <sys/stat.h>
#include <windows.h>
#else // (defined _WIN32) || (defined _WIN64)
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#endif // (defined _WIN32) || (defined _WIN64)
#include "mapper.h"
namespace marisa {
namespace grimoire {
namespace io {
#if (defined _WIN32) || (defined _WIN64)
Mapper::Mapper()
: ptr_(NULL), origin_(NULL), avail_(0), size_(0),
file_(NULL), map_(NULL) {}
#else // (defined _WIN32) || (defined _WIN64)
Mapper::Mapper()
: ptr_(NULL), origin_(MAP_FAILED), avail_(0), size_(0), fd_(-1) {}
#endif // (defined _WIN32) || (defined _WIN64)
#if (defined _WIN32) || (defined _WIN64)
Mapper::~Mapper() {
if (origin_ != NULL) {
::UnmapViewOfFile(origin_);
}
if (map_ != NULL) {
::CloseHandle(map_);
}
if (file_ != NULL) {
::CloseHandle(file_);
}
}
#else // (defined _WIN32) || (defined _WIN64)
Mapper::~Mapper() {
if (origin_ != MAP_FAILED) {
::munmap(origin_, size_);
}
if (fd_ != -1) {
::close(fd_);
}
}
#endif // (defined _WIN32) || (defined _WIN64)
void Mapper::open(const char *filename) {
MARISA_THROW_IF(filename == NULL, MARISA_NULL_ERROR);
Mapper temp;
temp.open_(filename);
swap(temp);
}
void Mapper::open(const void *ptr, std::size_t size) {
MARISA_THROW_IF((ptr == NULL) && (size != 0), MARISA_NULL_ERROR);
Mapper temp;
temp.open_(ptr, size);
swap(temp);
}
void Mapper::seek(std::size_t size) {
MARISA_THROW_IF(!is_open(), MARISA_STATE_ERROR);
MARISA_THROW_IF(size > avail_, MARISA_IO_ERROR);
map_data(size);
}
bool Mapper::is_open() const {
return ptr_ != NULL;
}
void Mapper::clear() {
Mapper().swap(*this);
}
void Mapper::swap(Mapper &rhs) {
marisa::swap(ptr_, rhs.ptr_);
marisa::swap(avail_, rhs.avail_);
marisa::swap(origin_, rhs.origin_);
marisa::swap(size_, rhs.size_);
#if (defined _WIN32) || (defined _WIN64)
marisa::swap(file_, rhs.file_);
marisa::swap(map_, rhs.map_);
#else // (defined _WIN32) || (defined _WIN64)
marisa::swap(fd_, rhs.fd_);
#endif // (defined _WIN32) || (defined _WIN64)
}
const void *Mapper::map_data(std::size_t size) {
MARISA_THROW_IF(!is_open(), MARISA_STATE_ERROR);
MARISA_THROW_IF(size > avail_, MARISA_IO_ERROR);
const char * const data = static_cast<const char *>(ptr_);
ptr_ = data + size;
avail_ -= size;
return data;
}
#if (defined _WIN32) || (defined _WIN64)
#ifdef __MSVCRT_VERSION__
#if __MSVCRT_VERSION__ >= 0x0601
#define MARISA_HAS_STAT64
#endif // __MSVCRT_VERSION__ >= 0x0601
#endif // __MSVCRT_VERSION__
void Mapper::open_(const char *filename) {
#ifdef MARISA_HAS_STAT64
struct __stat64 st;
MARISA_THROW_IF(::_stat64(filename, &st) != 0, MARISA_IO_ERROR);
#else // MARISA_HAS_STAT64
struct _stat st;
MARISA_THROW_IF(::_stat(filename, &st) != 0, MARISA_IO_ERROR);
#endif // MARISA_HAS_STAT64
MARISA_THROW_IF((UInt64)st.st_size > MARISA_SIZE_MAX, MARISA_SIZE_ERROR);
size_ = (std::size_t)st.st_size;
file_ = ::CreateFileA(filename, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
MARISA_THROW_IF(file_ == INVALID_HANDLE_VALUE, MARISA_IO_ERROR);
map_ = ::CreateFileMapping(file_, NULL, PAGE_READONLY, 0, 0, NULL);
MARISA_THROW_IF(map_ == NULL, MARISA_IO_ERROR);
origin_ = ::MapViewOfFile(map_, FILE_MAP_READ, 0, 0, 0);
MARISA_THROW_IF(origin_ == NULL, MARISA_IO_ERROR);
ptr_ = static_cast<const char *>(origin_);
avail_ = size_;
}
#else // (defined _WIN32) || (defined _WIN64)
void Mapper::open_(const char *filename) {
struct stat st;
MARISA_THROW_IF(::stat(filename, &st) != 0, MARISA_IO_ERROR);
MARISA_THROW_IF((UInt64)st.st_size > MARISA_SIZE_MAX, MARISA_SIZE_ERROR);
size_ = (std::size_t)st.st_size;
fd_ = ::open(filename, O_RDONLY);
MARISA_THROW_IF(fd_ == -1, MARISA_IO_ERROR);
origin_ = ::mmap(NULL, size_, PROT_READ, MAP_SHARED, fd_, 0);
MARISA_THROW_IF(origin_ == MAP_FAILED, MARISA_IO_ERROR);
ptr_ = static_cast<const char *>(origin_);
avail_ = size_;
}
#endif // (defined _WIN32) || (defined _WIN64)
void Mapper::open_(const void *ptr, std::size_t size) {
ptr_ = ptr;
avail_ = size;
}
} // namespace io
} // namespace grimoire
} // namespace marisa
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