7zFile.h File Reference

#include <cstdio>
#include "Types.h"

Go to the source code of this file.

Classes
struct	CFileInStream
struct	CFileOutStream
struct	CFileSeqInStream
struct	CSzFile

Functions
WRes	File_Close (CSzFile *p)
void	File_Construct (CSzFile *p)
WRes	File_GetLength (CSzFile *p, UInt64 *length)
WRes	File_Read (CSzFile *p, void *data, size_t *size)
WRes	File_Seek (CSzFile *p, Int64 *pos, ESzSeek origin)
WRes	File_Write (CSzFile *p, const void *data, size_t *size)
void	FileInStream_CreateVTable (CFileInStream *p)
void	FileOutStream_CreateVTable (CFileOutStream *p)
void	FileSeqInStream_CreateVTable (CFileSeqInStream *p)
WRes	InFile_Open (CSzFile *p, const char *name)
WRes	OutFile_Open (CSzFile *p, const char *name)

Function Documentation

WRes File_Close

(

CSzFile *

p

)

Definition at line 77 of file 7zFile.cc.

References CSzFile::file.

Referenced by LzmaFile::Close().

                            {
#ifdef USE_WINDOWS_FILE
  if (p->handle != INVALID_HANDLE_VALUE) {
    if (!CloseHandle(p->handle))
      return GetLastError();
    p->handle = INVALID_HANDLE_VALUE;
  }
#else
  if (p->file != nullptr) {
    int res = fclose(p->file);
    if (res != 0)
      return res;
    p->file = nullptr;
  }
#endif
  return 0;
}

void File_Construct

(

CSzFile *

p

)

Definition at line 28 of file 7zFile.cc.

References CSzFile::file.

Referenced by LzmaFile::Open().

                                {
#ifdef USE_WINDOWS_FILE
  p->handle = INVALID_HANDLE_VALUE;
#else
  p->file = nullptr;
#endif
}

WRes File_GetLength	(	CSzFile *	p,
		UInt64 *	length
	)

Definition at line 212 of file 7zFile.cc.

References CSzFile::file.

                                                {
#ifdef USE_WINDOWS_FILE

  DWORD sizeHigh;
  DWORD sizeLow = GetFileSize(p->handle, &sizeHigh);
  if (sizeLow == 0xFFFFFFFF) {
    DWORD res = GetLastError();
    if (res != NO_ERROR)
      return res;
  }
  *length = (((UInt64)sizeHigh) << 32) + sizeLow;
  return 0;

#else

  long pos = ftell(p->file);
  int res = fseek(p->file, 0, SEEK_END);
  *length = ftell(p->file);
  fseek(p->file, pos, SEEK_SET);
  return res;

#endif
}

WRes File_Read	(	CSzFile *	p,
		void *	data,
		size_t *	size
	)

Definition at line 95 of file 7zFile.cc.

References CSzFile::file, NULL, and findQualityFiles::size.

Referenced by FileInStream_Read(), and FileSeqInStream_Read().

                                                     {
  size_t originalSize = *size;
  if (originalSize == 0)
    return 0;

#ifdef USE_WINDOWS_FILE

  *size = 0;
  do {
    DWORD curSize = (originalSize > kChunkSizeMax) ? kChunkSizeMax : (DWORD)originalSize;
    DWORD processed = 0;
    BOOL res = ReadFile(p->handle, data, curSize, &processed, NULL);
    data = (void *)((Byte *)data + processed);
    originalSize -= processed;
    *size += processed;
    if (!res)
      return GetLastError();
    if (processed == 0)
      break;
  } while (originalSize > 0);
  return 0;

#else

  *size = fread(data, 1, originalSize, p->file);
  if (*size == originalSize)
    return 0;
  return ferror(p->file);

#endif
}

WRes File_Seek	(	CSzFile *	p,
		Int64 *	pos,
		ESzSeek	origin
	)

Definition at line 159 of file 7zFile.cc.

References CSzFile::file, SZ_SEEK_CUR, SZ_SEEK_END, SZ_SEEK_SET, and relativeConstraints::value.

Referenced by FileInStream_Seek().

                                                       {
#ifdef USE_WINDOWS_FILE

  LARGE_INTEGER value;
  DWORD moveMethod;
  value.LowPart = (DWORD)*pos;
  value.HighPart = (LONG)((UInt64)*pos >> 16 >> 16); /* for case when UInt64 is 32-bit only */
  switch (origin) {
    case SZ_SEEK_SET:
      moveMethod = FILE_BEGIN;
      break;
    case SZ_SEEK_CUR:
      moveMethod = FILE_CURRENT;
      break;
    case SZ_SEEK_END:
      moveMethod = FILE_END;
      break;
    default:
      return ERROR_INVALID_PARAMETER;
  }
  value.LowPart = SetFilePointer(p->handle, value.LowPart, &value.HighPart, moveMethod);
  if (value.LowPart == 0xFFFFFFFF) {
    WRes res = GetLastError();
    if (res != NO_ERROR)
      return res;
  }
  *pos = ((Int64)value.HighPart << 32) | value.LowPart;
  return 0;

#else

  int moveMethod;
  int res;
  switch (origin) {
    case SZ_SEEK_SET:
      moveMethod = SEEK_SET;
      break;
    case SZ_SEEK_CUR:
      moveMethod = SEEK_CUR;
      break;
    case SZ_SEEK_END:
      moveMethod = SEEK_END;
      break;
    default:
      return 1;
  }
  res = fseek(p->file, (long)*pos, moveMethod);
  *pos = ftell(p->file);
  return res;

#endif
}

WRes File_Write	(	CSzFile *	p,
		const void *	data,
		size_t *	size
	)

Definition at line 127 of file 7zFile.cc.

References CSzFile::file, NULL, and findQualityFiles::size.

Referenced by FileOutStream_Write().

                                                            {
  size_t originalSize = *size;
  if (originalSize == 0)
    return 0;

#ifdef USE_WINDOWS_FILE

  *size = 0;
  do {
    DWORD curSize = (originalSize > kChunkSizeMax) ? kChunkSizeMax : (DWORD)originalSize;
    DWORD processed = 0;
    BOOL res = WriteFile(p->handle, data, curSize, &processed, NULL);
    data = (void *)((Byte *)data + processed);
    originalSize -= processed;
    *size += processed;
    if (!res)
      return GetLastError();
    if (processed == 0)
      break;
  } while (originalSize > 0);
  return 0;

#else

  *size = fwrite(data, 1, originalSize, p->file);
  if (*size == originalSize)
    return 0;
  return ferror(p->file);

#endif
}

void FileInStream_CreateVTable

(

CFileInStream *

p

)

Definition at line 257 of file 7zFile.cc.

References FileInStream_Read(), FileInStream_Seek(), ISeekInStream::Read, CFileInStream::s, and ISeekInStream::Seek.

                                                 {
  p->s.Read = FileInStream_Read;
  p->s.Seek = FileInStream_Seek;
}

void FileOutStream_CreateVTable

(

CFileOutStream *

p

)

Definition at line 270 of file 7zFile.cc.

References FileOutStream_Write(), CFileOutStream::s, and ISeqOutStream::Write.

{ p->s.Write = FileOutStream_Write; }

void FileSeqInStream_CreateVTable

(

CFileSeqInStream *

p

)

Definition at line 243 of file 7zFile.cc.

References FileSeqInStream_Read(), ISeqInStream::Read, and CFileSeqInStream::s.

Referenced by LzmaFile::Open().

{ p->s.Read = FileSeqInStream_Read; }

WRes InFile_Open	(	CSzFile *	p,
		const char *	name
	)

Definition at line 58 of file 7zFile.cc.

References File_Open().

Referenced by LzmaFile::Open().

{ return File_Open(p, name, 0); }

WRes OutFile_Open	(	CSzFile *	p,
		const char *	name
	)

Definition at line 59 of file 7zFile.cc.

References File_Open().

{ return File_Open(p, name, 1); }