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/* Copyright (C) 1999-2021 by The D Language Foundation, All Rights Reserved
* http://www.digitalmars.com
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
* https://github.com/D-Programming-Language/dmd/blob/master/src/root/file.c
*/
#include "dsystem.h"
#include "file.h"
#if _WIN32
#include <windows.h>
#endif
#if POSIX
#include <utime.h>
#endif
#include "filename.h"
#include "array.h"
#include "rmem.h"
/****************************** File ********************************/
File::File(const FileName *n)
{
ref = 0;
buffer = NULL;
len = 0;
name = const_cast<FileName *>(n);
}
File *File::create(const char *n)
{
return new File(n);
}
File::File(const char *n)
{
ref = 0;
buffer = NULL;
len = 0;
name = new FileName(n);
}
File::~File()
{
if (buffer)
{
if (ref == 0)
mem.xfree(buffer);
#if _WIN32
if (ref == 2)
UnmapViewOfFile(buffer);
#endif
}
}
/*************************************
*/
bool File::read()
{
if (len)
return false; // already read the file
#if POSIX
size_t size;
struct stat buf;
ssize_t numread;
const char *name = this->name->toChars();
//printf("File::read('%s')\n",name);
int fd = open(name, O_RDONLY);
if (fd == -1)
{
//printf("\topen error, errno = %d\n",errno);
goto err1;
}
if (!ref)
::free(buffer);
ref = 0; // we own the buffer now
//printf("\tfile opened\n");
if (fstat(fd, &buf))
{
printf("\tfstat error, errno = %d\n",errno);
goto err2;
}
size = (size_t)buf.st_size;
#ifdef IN_GCC
buffer = (unsigned char *) ::xmalloc(size + 2);
#else
buffer = (unsigned char *) ::malloc(size + 2);
#endif
if (!buffer)
{
printf("\tmalloc error, errno = %d\n",errno);
goto err2;
}
numread = ::read(fd, buffer, size);
if (numread != (ssize_t)size)
{
printf("\tread error, errno = %d\n",errno);
goto err2;
}
if (close(fd) == -1)
{
printf("\tclose error, errno = %d\n",errno);
goto err;
}
len = size;
// Always store a wchar ^Z past end of buffer so scanner has a sentinel
buffer[size] = 0; // ^Z is obsolete, use 0
buffer[size + 1] = 0;
return false;
err2:
close(fd);
err:
::free(buffer);
buffer = NULL;
len = 0;
err1:
return true;
#elif _WIN32
DWORD size;
DWORD numread;
const char *name = this->name->toChars();
HANDLE h = CreateFileA(name,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,NULL);
if (h == INVALID_HANDLE_VALUE)
goto err1;
if (!ref)
::free(buffer);
ref = 0;
size = GetFileSize(h,NULL);
#ifdef IN_GCC
buffer = (unsigned char *) ::xmalloc(size + 2);
#else
buffer = (unsigned char *) ::malloc(size + 2);
#endif
if (!buffer)
goto err2;
if (ReadFile(h,buffer,size,&numread,NULL) != TRUE)
goto err2;
if (numread != size)
goto err2;
if (!CloseHandle(h))
goto err;
len = size;
// Always store a wchar ^Z past end of buffer so scanner has a sentinel
buffer[size] = 0; // ^Z is obsolete, use 0
buffer[size + 1] = 0;
return 0;
err2:
CloseHandle(h);
err:
::free(buffer);
buffer = NULL;
len = 0;
err1:
return true;
#else
assert(0);
#endif
}
/*********************************************
* Write a file.
* Returns:
* false success
*/
bool File::write()
{
#if POSIX
ssize_t numwritten;
const char *name = this->name->toChars();
int fd = open(name, O_CREAT | O_WRONLY | O_TRUNC, (6 << 6) | (4 << 3) | 4);
if (fd == -1)
goto err;
numwritten = ::write(fd, buffer, len);
if ((ssize_t)len != numwritten)
goto err2;
if (close(fd) == -1)
goto err;
return false;
err2:
close(fd);
::remove(name);
err:
return true;
#elif _WIN32
DWORD numwritten;
const char *name = this->name->toChars();
HANDLE h = CreateFileA(name,GENERIC_WRITE,0,NULL,CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,NULL);
if (h == INVALID_HANDLE_VALUE)
goto err;
if (WriteFile(h,buffer,len,&numwritten,NULL) != TRUE)
goto err2;
if (len != numwritten)
goto err2;
if (!CloseHandle(h))
goto err;
return false;
err2:
CloseHandle(h);
DeleteFileA(name);
err:
return true;
#else
assert(0);
#endif
}
void File::remove()
{
#if POSIX
::remove(this->name->toChars());
#elif _WIN32
DeleteFileA(this->name->toChars());
#else
assert(0);
#endif
}
const char *File::toChars()
{
return name->toChars();
}
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