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https://github.com/yuzu-emu/FasTC.git
synced 2024-11-24 09:35:48 +01:00
Split filestream implementation into unix and windows versions.
This commit is contained in:
parent
b43373c0aa
commit
96f223c509
@ -2,7 +2,6 @@
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SET( SOURCES
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"src/ImageWriter.cpp"
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"src/ImageLoader.cpp"
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"src/FileStream.cpp"
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"src/ImageFile.cpp"
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)
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@ -13,6 +12,15 @@ SET( HEADERS
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"include/FileStream.h"
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)
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IF( WIN32 )
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SET( SOURCES ${SOURCES} "src/FileStreamWin32.cpp" )
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ELSE()
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SET( SOURCES ${SOURCES} "src/FileStreamUnix.cpp" )
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# Assume compiler is GCC
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SET( LINK_FLAGS -lrt ${LINK_FLAGS} )
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ENDIF()
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FIND_PACKAGE( PNG )
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IF( PNG_FOUND )
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INCLUDE_DIRECTORIES( ${PNG_INCLUDE_DIR} )
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@ -96,6 +96,8 @@ FileStream &FileStream::operator=(const FileStream &other) {
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m_Mode = other.m_Mode;
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strncpy(m_Filename, other.m_Filename, kMaxFilenameSz);
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return *this;
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}
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FileStream::~FileStream() {
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213
IO/src/FileStreamWin32.cpp
Executable file
213
IO/src/FileStreamWin32.cpp
Executable file
@ -0,0 +1,213 @@
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#include "FileStream.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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class FileStreamImpl {
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private:
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// Track the number of references to this filestream so
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// that we know whether or not we need to close it when
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// the object gets destroyed.
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uint32 m_ReferenceCount;
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FILE *m_FilePtr;
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public:
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FileStreamImpl(const CHAR *filename, EFileMode mode)
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: m_ReferenceCount(1)
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{
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const char *modeStr = "r";
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switch(mode) {
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default:
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case eFileMode_Read:
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// Do nothing.
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break;
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case eFileMode_ReadBinary:
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modeStr = "rb";
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break;
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case eFileMode_Write:
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modeStr = "w";
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break;
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case eFileMode_WriteBinary:
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modeStr = "wb";
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break;
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case eFileMode_WriteAppend:
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modeStr = "a";
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break;
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case eFileMode_WriteBinaryAppend:
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modeStr = "ab";
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break;
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}
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m_FilePtr = fopen(filename, modeStr);
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}
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~FileStreamImpl() {
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fclose(m_FilePtr);
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}
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void IncreaseReferenceCount() { m_ReferenceCount++; }
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void DecreaseReferenceCount() { m_ReferenceCount--; }
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uint32 GetReferenceCount() { return m_ReferenceCount; }
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FILE *GetFilePtr() const { return m_FilePtr; }
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};
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FileStream::FileStream(const CHAR *filename, EFileMode mode)
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: m_Impl(new FileStreamImpl(filename, mode))
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, m_Mode(mode)
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{
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strncpy(m_Filename, filename, kMaxFilenameSz);
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m_Filename[kMaxFilenameSz - 1] = '\0';
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}
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FileStream::FileStream(const FileStream &other)
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: m_Impl(other.m_Impl)
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, m_Mode(other.m_Mode)
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{
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m_Impl->IncreaseReferenceCount();
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strncpy(m_Filename, other.m_Filename, kMaxFilenameSz);
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}
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FileStream &FileStream::operator=(const FileStream &other) {
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// We no longer reference this implementation.
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m_Impl->DecreaseReferenceCount();
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// If we're the last ones to reference it, then it should be destroyed.
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if(m_Impl->GetReferenceCount() <= 0) {
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assert(m_Impl->GetReferenceCount() == 0);
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delete m_Impl;
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m_Impl = 0;
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}
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m_Impl = other.m_Impl;
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m_Impl->IncreaseReferenceCount();
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m_Mode = other.m_Mode;
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strncpy(m_Filename, other.m_Filename, kMaxFilenameSz);
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return *this;
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}
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FileStream::~FileStream() {
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// We no longer reference this implementation.
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m_Impl->DecreaseReferenceCount();
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// If we're the last ones to reference it, then it should be destroyed.
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if(m_Impl->GetReferenceCount() <= 0) {
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assert(m_Impl->GetReferenceCount() == 0);
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delete m_Impl;
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m_Impl = 0;
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}
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}
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int32 FileStream::Read(uint8 *buf, uint32 bufSz) {
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if(
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m_Mode == eFileMode_Write ||
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m_Mode == eFileMode_WriteBinary ||
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m_Mode == eFileMode_WriteAppend ||
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m_Mode == eFileMode_WriteBinaryAppend
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) {
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fprintf(stderr, "Cannot read from file '%s': File opened for reading.", m_Filename);
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return -2;
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}
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FILE *fp = m_Impl->GetFilePtr();
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if(NULL == fp)
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return -1;
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uint32 amtRead = fread(buf, 1, bufSz, fp);
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if(amtRead != bufSz && !feof(fp)) {
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fprintf(stderr, "Error reading from file '%s'.", m_Filename);
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return -1;
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}
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return amtRead;
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}
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int32 FileStream::Write(const uint8 *buf, uint32 bufSz) {
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if(
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m_Mode == eFileMode_Read ||
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m_Mode == eFileMode_ReadBinary
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) {
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fprintf(stderr, "Cannot write to file '%s': File opened for writing.", m_Filename);
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return -2;
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}
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FILE *fp = m_Impl->GetFilePtr();
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if(NULL == fp)
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return -1;
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uint32 amtWritten = fwrite(buf, 1, bufSz, fp);
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if(amtWritten != bufSz) {
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fprintf(stderr, "Error writing to file '%s'.", m_Filename);
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return -1;
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}
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return amtWritten;
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}
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int64 FileStream::Tell() {
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FILE *fp = m_Impl->GetFilePtr();
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if(NULL == fp) {
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return -1;
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}
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long int ret = ftell(fp);
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if(-1L == ret) {
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perror("Error opening file");
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return -1;
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}
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return ret;
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}
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bool FileStream::Seek(uint32 offset, ESeekPosition pos) {
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// We cannot seek in append mode.
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if(m_Mode == eFileMode_WriteAppend || m_Mode == eFileMode_WriteBinaryAppend)
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return false;
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FILE *fp = m_Impl->GetFilePtr();
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if(NULL == fp) return false;
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int origin = SEEK_SET;
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switch(pos) {
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default:
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case eSeekPosition_Beginning:
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// Do nothing
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break;
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case eSeekPosition_Current:
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origin = SEEK_CUR;
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break;
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case eSeekPosition_End:
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origin = SEEK_END;
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break;
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}
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if(fseek(fp, offset, origin))
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return false;
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return true;
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}
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void FileStream::Flush() {
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FILE *fp = m_Impl->GetFilePtr();
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if(NULL != fp) {
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fflush(fp);
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}
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}
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