From 675b4aa878f16291ce33fced48a2bc7425f635ae Mon Sep 17 00:00:00 2001 From: Alexander Harkness Date: Sun, 24 Nov 2013 14:19:41 +0000 Subject: Moved source to src --- src/OSSupport/File.cpp | 375 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 375 insertions(+) create mode 100644 src/OSSupport/File.cpp (limited to 'src/OSSupport/File.cpp') diff --git a/src/OSSupport/File.cpp b/src/OSSupport/File.cpp new file mode 100644 index 000000000..d2eea498a --- /dev/null +++ b/src/OSSupport/File.cpp @@ -0,0 +1,375 @@ + +// cFile.cpp + +// Implements the cFile class providing an OS-independent abstraction of a file. + +#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules + +#include "File.h" +#include + + + + + +cFile::cFile(void) : + #ifdef USE_STDIO_FILE + m_File(NULL) + #else + m_File(INVALID_HANDLE_VALUE) + #endif // USE_STDIO_FILE +{ + // Nothing needed yet +} + + + + + +cFile::cFile(const AString & iFileName, eMode iMode) : + #ifdef USE_STDIO_FILE + m_File(NULL) + #else + m_File(INVALID_HANDLE_VALUE) + #endif // USE_STDIO_FILE +{ + Open(iFileName, iMode); +} + + + + + +cFile::~cFile() +{ + if (IsOpen()) + { + Close(); + } +} + + + + + +bool cFile::Open(const AString & iFileName, eMode iMode) +{ + ASSERT(!IsOpen()); // You should close the file before opening another one + + if (IsOpen()) + { + Close(); + } + + const char * Mode = NULL; + switch (iMode) + { + case fmRead: Mode = "rb"; break; + case fmWrite: Mode = "wb"; break; + case fmReadWrite: Mode = "rb+"; break; + default: + { + ASSERT(!"Unhandled file mode"); + return false; + } + } + m_File = fopen( (FILE_IO_PREFIX + iFileName).c_str(), Mode); + if ((m_File == NULL) && (iMode == fmReadWrite)) + { + // Fix for MS not following C spec, opening "a" mode files for writing at the end only + // The file open operation has been tried with "read update", fails if file not found + // So now we know either the file doesn't exist or we don't have rights, no need to worry about file contents. + // Simply re-open for read-writing, erasing existing contents: + m_File = fopen( (FILE_IO_PREFIX + iFileName).c_str(), "wb+"); + } + return (m_File != NULL); +} + + + + + +void cFile::Close(void) +{ + if (!IsOpen()) + { + // Closing an unopened file is a legal nop + return; + } + + fclose(m_File); + m_File = NULL; +} + + + + + +bool cFile::IsOpen(void) const +{ + return (m_File != NULL); +} + + + + + +bool cFile::IsEOF(void) const +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + // Unopened files behave as at EOF + return true; + } + + return (feof(m_File) != 0); +} + + + + + +int cFile::Read (void * iBuffer, int iNumBytes) +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + return -1; + } + + return fread(iBuffer, 1, iNumBytes, m_File); // fread() returns the portion of Count parameter actually read, so we need to send iNumBytes as Count +} + + + + + +int cFile::Write(const void * iBuffer, int iNumBytes) +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + return -1; + } + + int res = fwrite(iBuffer, 1, iNumBytes, m_File); // fwrite() returns the portion of Count parameter actually written, so we need to send iNumBytes as Count + return res; +} + + + + + +int cFile::Seek (int iPosition) +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + return -1; + } + + if (fseek(m_File, iPosition, SEEK_SET) != 0) + { + return -1; + } + return ftell(m_File); +} + + + + + + +int cFile::Tell (void) const +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + return -1; + } + + return ftell(m_File); +} + + + + + +int cFile::GetSize(void) const +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + return -1; + } + + int CurPos = ftell(m_File); + if (CurPos < 0) + { + return -1; + } + if (fseek(m_File, 0, SEEK_END) != 0) + { + return -1; + } + int res = ftell(m_File); + if (fseek(m_File, CurPos, SEEK_SET) != 0) + { + return -1; + } + return res; +} + + + + + +int cFile::ReadRestOfFile(AString & a_Contents) +{ + ASSERT(IsOpen()); + + if (!IsOpen()) + { + return -1; + } + + int DataSize = GetSize() - Tell(); + + // HACK: This depends on the internal knowledge that AString's data() function returns the internal buffer directly + a_Contents.assign(DataSize, '\0'); + return Read((void *)a_Contents.data(), DataSize); +} + + + + + +bool cFile::Exists(const AString & a_FileName) +{ + cFile test(a_FileName, fmRead); + return test.IsOpen(); +} + + + + + +bool cFile::Delete(const AString & a_FileName) +{ + return (remove(a_FileName.c_str()) == 0); +} + + + + + +bool cFile::Rename(const AString & a_OrigFileName, const AString & a_NewFileName) +{ + return (rename(a_OrigFileName.c_str(), a_NewFileName.c_str()) == 0); +} + + + + + +bool cFile::Copy(const AString & a_SrcFileName, const AString & a_DstFileName) +{ + #ifdef _WIN32 + return (CopyFile(a_SrcFileName.c_str(), a_DstFileName.c_str(), true) != 0); + #else + // Other OSs don't have a direct CopyFile equivalent, do it the harder way: + std::ifstream src(a_SrcFileName.c_str(), std::ios::binary); + std::ofstream dst(a_DstFileName.c_str(), std::ios::binary); + if (dst.good()) + { + dst << src.rdbuf(); + return true; + } + else + { + return false; + } + #endif +} + + + + + +bool cFile::IsFolder(const AString & a_Path) +{ + #ifdef _WIN32 + DWORD FileAttrib = GetFileAttributes(a_Path.c_str()); + return ((FileAttrib != INVALID_FILE_ATTRIBUTES) && ((FileAttrib & FILE_ATTRIBUTE_DIRECTORY) != 0)); + #else + struct stat st; + return ((stat(a_Path.c_str(), &st) == 0) && S_ISDIR(st.st_mode)); + #endif +} + + + + + +bool cFile::IsFile(const AString & a_Path) +{ + #ifdef _WIN32 + DWORD FileAttrib = GetFileAttributes(a_Path.c_str()); + return ((FileAttrib != INVALID_FILE_ATTRIBUTES) && ((FileAttrib & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE)) == 0)); + #else + struct stat st; + return ((stat(a_Path.c_str(), &st) == 0) && S_ISREG(st.st_mode)); + #endif +} + + + + + +int cFile::GetSize(const AString & a_FileName) +{ + struct stat st; + if (stat(a_FileName.c_str(), &st) == 0) + { + return st.st_size; + } + return -1; +} + + + + + +bool cFile::CreateFolder(const AString & a_FolderPath) +{ + #ifdef _WIN32 + return (CreateDirectory(a_FolderPath.c_str(), NULL) != 0); + #else + return (mkdir(a_FolderPath.c_str(), S_IRWXU | S_IRWXG | S_IRWXO) == 0); + #endif +} + + + + + +int cFile::Printf(const char * a_Fmt, ...) +{ + AString buf; + va_list args; + va_start(args, a_Fmt); + AppendVPrintf(buf, a_Fmt, args); + va_end(args); + return Write(buf.c_str(), buf.length()); +} + + + + -- cgit v1.2.3