cpp/openttd-patchpack/source Changeset - r25410:d53b791515ba

Changeset - r25410:d53b791515ba

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Rubidium - 3 years ago 2021-04-13 19:36:24
rubidium@openttd.org

Codechange: use the new RandomAccessFile as backend for the FIO slot functions

1 file changed with 22 insertions and 87 deletions:

src/fileio.cpp

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src/fileio.cpp

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

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