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Codechange: use the new RandomAccessFile as backend for the FIO slot functions
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Rubidium
rubidium42
parent
8e0b1b5d1a
commit
b144e56b2c
109
src/fileio.cpp
109
src/fileio.cpp
@ -9,6 +9,7 @@
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#include "stdafx.h"
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#include "fileio_func.h"
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#include "random_access_file_type.h"
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#include "debug.h"
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#include "fios.h"
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#include "string_func.h"
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@ -29,22 +30,8 @@
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#include "safeguards.h"
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/** Size of the #Fio data buffer. */
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#define FIO_BUFFER_SIZE 512
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/** Structure for keeping several open files with just one data buffer. */
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struct Fio {
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byte *buffer, *buffer_end; ///< position pointer in local buffer and last valid byte of buffer
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byte buffer_start[FIO_BUFFER_SIZE]; ///< local buffer when read from file
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size_t pos; ///< current (system) position in file
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FILE *cur_fh; ///< current file handle
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std::string filename; ///< current filename
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std::array<FILE *, MAX_FILE_SLOTS> handles; ///< array of file handles we can have open
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std::array<std::string, MAX_FILE_SLOTS> filenames; ///< array of filenames we (should) have open
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std::array<std::string, MAX_FILE_SLOTS> shortnames;///< array of short names for spriteloader's use
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};
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static Fio _fio; ///< #Fio instance.
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static RandomAccessFile *_fio_current_file; ///< current file handle for the Fio functions
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static std::array<RandomAccessFile *, MAX_FILE_SLOTS> _fio_files; ///< array of random access files we can have open
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/** Whether the working directory should be scanned. */
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static bool _do_scan_working_directory = true;
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@ -58,7 +45,7 @@ extern std::string _highscore_file;
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*/
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size_t FioGetPos()
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{
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return _fio.pos + (_fio.buffer - _fio.buffer_end);
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return _fio_current_file->GetPos();
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}
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/**
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@ -68,7 +55,7 @@ size_t FioGetPos()
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*/
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const char *FioGetFilename(uint8 slot)
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{
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return _fio.shortnames[slot].c_str();
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return _fio_current_file->GetSimplifiedFilename().c_str();
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}
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/**
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@ -78,12 +65,7 @@ const char *FioGetFilename(uint8 slot)
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*/
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void FioSeekTo(size_t pos, int mode)
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{
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if (mode == SEEK_CUR) pos += FioGetPos();
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_fio.buffer = _fio.buffer_end = _fio.buffer_start + FIO_BUFFER_SIZE;
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_fio.pos = pos;
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if (fseek(_fio.cur_fh, _fio.pos, SEEK_SET) < 0) {
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DEBUG(misc, 0, "Seeking in %s failed", _fio.filename.c_str());
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}
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_fio_current_file->SeekTo(pos, mode);
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}
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/**
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@ -93,11 +75,10 @@ void FioSeekTo(size_t pos, int mode)
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*/
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void FioSeekToFile(uint8 slot, size_t pos)
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{
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FILE *f = _fio.handles[slot];
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assert(f != nullptr);
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_fio.cur_fh = f;
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_fio.filename = _fio.filenames[slot];
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FioSeekTo(pos, SEEK_SET);
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RandomAccessFile *raf = _fio_files[slot];
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assert(raf != nullptr);
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_fio_current_file = raf;
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_fio_current_file->SeekTo(pos, SEEK_SET);
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}
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/**
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@ -106,15 +87,7 @@ void FioSeekToFile(uint8 slot, size_t pos)
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*/
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byte FioReadByte()
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{
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if (_fio.buffer == _fio.buffer_end) {
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_fio.buffer = _fio.buffer_start;
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size_t size = fread(_fio.buffer, 1, FIO_BUFFER_SIZE, _fio.cur_fh);
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_fio.pos += size;
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_fio.buffer_end = _fio.buffer_start + size;
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if (size == 0) return 0;
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}
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return *_fio.buffer++;
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return _fio_current_file->ReadByte();
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}
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/**
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@ -123,14 +96,7 @@ byte FioReadByte()
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*/
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void FioSkipBytes(int n)
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{
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for (;;) {
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int m = std::min<int>(_fio.buffer_end - _fio.buffer, n);
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_fio.buffer += m;
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n -= m;
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if (n == 0) break;
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FioReadByte();
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n--;
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}
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return _fio_current_file->SkipBytes(n);
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}
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/**
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@ -139,8 +105,7 @@ void FioSkipBytes(int n)
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*/
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uint16 FioReadWord()
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{
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byte b = FioReadByte();
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return (FioReadByte() << 8) | b;
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return _fio_current_file->ReadWord();
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}
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/**
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@ -149,8 +114,7 @@ uint16 FioReadWord()
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*/
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uint32 FioReadDword()
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{
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uint b = FioReadWord();
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return (FioReadWord() << 16) | b;
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return _fio_current_file->ReadDword();
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}
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/**
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@ -160,30 +124,15 @@ uint32 FioReadDword()
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*/
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void FioReadBlock(void *ptr, size_t size)
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{
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FioSeekTo(FioGetPos(), SEEK_SET);
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_fio.pos += fread(ptr, 1, size, _fio.cur_fh);
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}
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/**
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* Close the file at the given slot number.
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* @param slot File index to close.
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*/
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static inline void FioCloseFile(int slot)
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{
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if (_fio.handles[slot] != nullptr) {
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fclose(_fio.handles[slot]);
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_fio.shortnames[slot].clear();
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_fio.handles[slot] = nullptr;
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}
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_fio_current_file->ReadBlock(ptr, size);
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}
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/** Close all slotted open files. */
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void FioCloseAll()
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{
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for (int i = 0; i != lengthof(_fio.handles); i++) {
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FioCloseFile(i);
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for (int i = 0; i != lengthof(_fio_files); i++) {
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delete _fio_files[i];
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_fio_files[i] = nullptr;
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}
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}
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@ -195,24 +144,10 @@ void FioCloseAll()
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*/
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void FioOpenFile(int slot, const std::string &filename, Subdirectory subdir)
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{
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FILE *f;
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f = FioFOpenFile(filename, "rb", subdir);
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if (f == nullptr) usererror("Cannot open file '%s'", filename.c_str());
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long pos = ftell(f);
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if (pos < 0) usererror("Cannot read file '%s'", filename.c_str());
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FioCloseFile(slot); // if file was opened before, close it
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_fio.handles[slot] = f;
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_fio.filenames[slot] = filename;
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/* Store the filename without path and extension */
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auto t = filename.rfind(PATHSEPCHAR);
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std::string sn = filename.substr(t != std::string::npos ? t + 1 : 0);
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_fio.shortnames[slot] = sn.substr(0, sn.rfind('.'));
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strtolower(_fio.shortnames[slot]);
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FioSeekToFile(slot, (size_t)pos);
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RandomAccessFile *raf = new RandomAccessFile(filename, subdir);
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delete _fio_files[slot];
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_fio_files[slot] = raf;
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_fio_current_file = raf;
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}
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static const char * const _subdirs[] = {
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@ -51,7 +51,7 @@ RandomAccessFile::~RandomAccessFile()
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* Get the filename of the opened file with the path from the SubDirectory and the extension.
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* @return Name of the file.
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*/
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const std::string& RandomAccessFile::GetFilename() const
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const std::string &RandomAccessFile::GetFilename() const
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{
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return this->filename;
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}
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@ -61,7 +61,7 @@ const std::string& RandomAccessFile::GetFilename() const
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* file without the SubDirectory or extension in lower case.
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* @return Name of the file.
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*/
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const std::string& RandomAccessFile::GetSimplifiedFilename() const
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const std::string &RandomAccessFile::GetSimplifiedFilename() const
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{
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return this->simplified_filename;
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}
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