Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/C/7zFile.c

-/* 7zFile.c -- File IO
-2008-11-22 : Igor Pavlov : Public domain */
-
-#include "7zFile.h"
-
-#ifndef USE_WINDOWS_FILE
-
-#include <errno.h>
-
-#endif
-
-#ifdef USE_WINDOWS_FILE
-
-/*
-   ReadFile and WriteFile functions in Windows have BUG:
-   If you Read or Write 64MB or more (probably min_failure_size = 64MB - 32KB + 1)
-   from/to Network file, it returns ERROR_NO_SYSTEM_RESOURCES
-   (Insufficient system resources exist to complete the requested service).
-   Probably in some version of Windows there are problems with other sizes:
-   for 32 MB (maybe also for 16 MB).
-   And message can be "Network connection was lost"
-*/
-
-#define kChunkSizeMax (1 << 22)
-
-#endif
-
-void File_Construct(CSzFile *p)
-{
-  #ifdef USE_WINDOWS_FILE
-  p->handle = INVALID_HANDLE_VALUE;
-  #else
-  p->file = NULL;
-  #endif
-}
-
-static WRes File_Open(CSzFile *p, const char *name, int writeMode)
-{
-  #ifdef USE_WINDOWS_FILE
-  p->handle = CreateFileA(name,
-      writeMode ? GENERIC_WRITE : GENERIC_READ,
-      FILE_SHARE_READ, NULL,
-      writeMode ? CREATE_ALWAYS : OPEN_EXISTING,
-      FILE_ATTRIBUTE_NORMAL, NULL);
-  return (p->handle != INVALID_HANDLE_VALUE) ? 0 : GetLastError();
-  #else
-  p->file = fopen(name, writeMode ? "wb+" : "rb");
-  return (p->file != 0) ? 0 : errno;
-  #endif
-}
-
-WRes InFile_Open(CSzFile *p, const char *name) { return File_Open(p, name, 0); }
-WRes OutFile_Open(CSzFile *p, const char *name) { return File_Open(p, name, 1); }
-
-WRes File_Close(CSzFile *p)
-{
-  #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 != NULL)
-  {
-    int res = fclose(p->file);
-    if (res != 0)
-      return res;
-    p->file = NULL;
-  }
-  #endif
-  return 0;
-}
-
-WRes File_Read(CSzFile *p, void *data, size_t *size)
-{
-  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_Write(CSzFile *p, const void *data, size_t *size)
-{
-  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
-}
-
-WRes File_Seek(CSzFile *p, Int64 *pos, ESzSeek origin)
-{
-  #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_GetLength(CSzFile *p, UInt64 *length)
-{
-  #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
-}
-
-
-/* ---------- FileSeqInStream ---------- */
-
-static SRes FileSeqInStream_Read(void *pp, void *buf, size_t *size)
-{
-  CFileSeqInStream *p = (CFileSeqInStream *)pp;
-  return File_Read(&p->file, buf, size) == 0 ? SZ_OK : SZ_ERROR_READ;
-}
-
-void FileSeqInStream_CreateVTable(CFileSeqInStream *p)
-{
-  p->s.Read = FileSeqInStream_Read;
-}
-
-
-/* ---------- FileInStream ---------- */
-
-static SRes FileInStream_Read(void *pp, void *buf, size_t *size)
-{
-  CFileInStream *p = (CFileInStream *)pp;
-  return (File_Read(&p->file, buf, size) == 0) ? SZ_OK : SZ_ERROR_READ;
-}
-
-static SRes FileInStream_Seek(void *pp, Int64 *pos, ESzSeek origin)
-{
-  CFileInStream *p = (CFileInStream *)pp;
-  return File_Seek(&p->file, pos, origin);
-}
-
-void FileInStream_CreateVTable(CFileInStream *p)
-{
-  p->s.Read = FileInStream_Read;
-  p->s.Seek = FileInStream_Seek;
-}
-
-
-/* ---------- FileOutStream ---------- */
-
-static size_t FileOutStream_Write(void *pp, const void *data, size_t size)
-{
-  CFileOutStream *p = (CFileOutStream *)pp;
-  File_Write(&p->file, data, &size);
-  return size;
-}
-
-void FileOutStream_CreateVTable(CFileOutStream *p)
-{
-  p->s.Write = FileOutStream_Write;
-}