mirror of
https://github.com/dborth/fceugx.git
synced 2025-01-10 07:39:39 +01:00
429 lines
9.1 KiB
C++
429 lines
9.1 KiB
C++
/* Copyright (C) 2009 DeSmuME team
|
|
*
|
|
* This file is part of DeSmuME
|
|
*
|
|
* DeSmuME is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* DeSmuME is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with DeSmuME; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef EMUFILE_H
|
|
#define EMUFILE_H
|
|
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <vector>
|
|
#include <algorithm>
|
|
#include <string>
|
|
#include <stdarg.h>
|
|
#include <malloc.h>
|
|
|
|
//should be changed to #ifdef FCEUX but too much work
|
|
#ifndef DESMUME
|
|
#ifndef __GCTYPES_H__
|
|
typedef unsigned char u8;
|
|
typedef unsigned short u16;
|
|
typedef unsigned int u32;
|
|
typedef char s8;
|
|
typedef short s16;
|
|
typedef int s32;
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef _XBOX
|
|
#undef min;
|
|
#undef max;
|
|
#endif
|
|
|
|
class EMUFILE {
|
|
protected:
|
|
bool failbit;
|
|
|
|
public:
|
|
EMUFILE()
|
|
: failbit(false)
|
|
{}
|
|
|
|
|
|
//takes control of the provided EMUFILE and returns a new EMUFILE which is guranteed to be in memory
|
|
static EMUFILE* memwrap(EMUFILE* fp);
|
|
|
|
virtual ~EMUFILE() {}
|
|
|
|
static bool readAllBytes(std::vector<u8>* buf, const std::string& fname);
|
|
|
|
bool fail() { return failbit; }
|
|
|
|
bool eof() { return size()==ftell(); }
|
|
|
|
size_t fread(const void *ptr, size_t bytes){
|
|
return _fread(ptr,bytes);
|
|
}
|
|
|
|
void unget() { fseek(-1,SEEK_CUR); }
|
|
|
|
//virtuals
|
|
public:
|
|
|
|
virtual FILE *get_fp() = 0;
|
|
|
|
virtual int fprintf(const char *format, ...) = 0;
|
|
|
|
virtual int fgetc() = 0;
|
|
virtual int fputc(int c) = 0;
|
|
|
|
virtual size_t _fread(const void *ptr, size_t bytes) = 0;
|
|
|
|
//removing these return values for now so we can find any code that might be using them and make sure
|
|
//they handle the return values correctly
|
|
|
|
virtual void fwrite(const void *ptr, size_t bytes) = 0;
|
|
|
|
virtual int fseek(int offset, int origin) = 0;
|
|
|
|
virtual int ftell() = 0;
|
|
virtual int size() = 0;
|
|
};
|
|
|
|
//todo - handle read-only specially?
|
|
class EMUFILE_MEMORY : public EMUFILE {
|
|
protected:
|
|
std::vector<u8> *vec;
|
|
bool ownvec;
|
|
s32 pos, len;
|
|
|
|
void reserve(u32 amt) {
|
|
if(vec->size() < amt)
|
|
vec->resize(amt);
|
|
}
|
|
|
|
public:
|
|
|
|
EMUFILE_MEMORY(std::vector<u8> *underlying) : vec(underlying), ownvec(false), pos(0), len(underlying->size()) { }
|
|
EMUFILE_MEMORY(u32 preallocate) : vec(new std::vector<u8>()), ownvec(true), pos(0), len(0) {
|
|
vec->resize(preallocate);
|
|
len = preallocate;
|
|
}
|
|
EMUFILE_MEMORY() : vec(new std::vector<u8>()), ownvec(true), pos(0), len(0) { vec->reserve(1024); }
|
|
EMUFILE_MEMORY(void* buf, s32 size) : vec(new std::vector<u8>()), ownvec(true), pos(0), len(size) {
|
|
vec->resize(size);
|
|
if(size != 0)
|
|
memcpy(&vec[0],buf,size);
|
|
}
|
|
|
|
~EMUFILE_MEMORY() {
|
|
if(ownvec) delete vec;
|
|
}
|
|
|
|
u8* buf() { return &(*vec)[0]; }
|
|
|
|
std::vector<u8>* get_vec() { return vec; };
|
|
|
|
virtual FILE *get_fp() { return NULL; }
|
|
|
|
virtual int fprintf(const char *format, ...) {
|
|
va_list argptr;
|
|
va_start(argptr, format);
|
|
|
|
//we dont generate straight into the buffer because it will null terminate (one more byte than we want)
|
|
int amt = vsnprintf(0,0,format,argptr);
|
|
char* tempbuf = new char[amt+1];
|
|
vsprintf(tempbuf,format,argptr);
|
|
fwrite(tempbuf,amt);
|
|
delete[] tempbuf;
|
|
va_end(argptr);
|
|
return amt;
|
|
};
|
|
|
|
virtual int fgetc() {
|
|
u8 temp;
|
|
|
|
//need an optimized codepath
|
|
//if(_fread(&temp,1) != 1)
|
|
// return EOF;
|
|
//else return temp;
|
|
u32 remain = len-pos;
|
|
if(remain<1) {
|
|
failbit = true;
|
|
return -1;
|
|
}
|
|
temp = buf()[pos];
|
|
pos++;
|
|
return temp;
|
|
}
|
|
virtual int fputc(int c) {
|
|
u8 temp = (u8)c;
|
|
//TODO
|
|
//if(fwrite(&temp,1)!=1) return EOF;
|
|
fwrite(&temp,1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
virtual size_t _fread(const void *ptr, size_t bytes){
|
|
u32 remain = len-pos;
|
|
u32 todo = std::min<u32>(remain,(u32)bytes);
|
|
memcpy((void*)ptr,buf()+pos,todo);
|
|
pos += todo;
|
|
if(todo<bytes)
|
|
failbit = true;
|
|
return todo;
|
|
}
|
|
|
|
//removing these return values for now so we can find any code that might be using them and make sure
|
|
//they handle the return values correctly
|
|
|
|
virtual void fwrite(const void *ptr, size_t bytes){
|
|
reserve(pos+bytes);
|
|
memcpy(buf()+pos,ptr,bytes);
|
|
pos += bytes;
|
|
len = std::max(pos,len);
|
|
}
|
|
|
|
virtual int fseek(int offset, int origin){
|
|
//work differently for read-only...?
|
|
switch(origin) {
|
|
case SEEK_SET:
|
|
pos = offset;
|
|
break;
|
|
case SEEK_CUR:
|
|
pos += offset;
|
|
break;
|
|
case SEEK_END:
|
|
pos = size()+offset;
|
|
break;
|
|
default:
|
|
assert(false);
|
|
}
|
|
reserve(pos);
|
|
return 0;
|
|
}
|
|
|
|
virtual int ftell() {
|
|
return pos;
|
|
}
|
|
|
|
void trim()
|
|
{
|
|
vec->resize(len);
|
|
}
|
|
|
|
virtual int size() { return (int)len; }
|
|
};
|
|
|
|
#ifdef GEKKO
|
|
class EMUFILE_MEMFILE : public EMUFILE {
|
|
protected:
|
|
bool own_buffer;
|
|
char *buffer;
|
|
s32 buffersize, pos, len;
|
|
|
|
public:
|
|
|
|
EMUFILE_MEMFILE(u32 preallocate) {
|
|
buffer = (char *)memalign(32, preallocate);
|
|
own_buffer = true;
|
|
buffersize = 0;
|
|
len = 0;
|
|
pos = 0;
|
|
|
|
if(!buffer)
|
|
return;
|
|
|
|
buffersize = preallocate;
|
|
}
|
|
EMUFILE_MEMFILE(void* src, s32 src_size) {
|
|
buffer = (char *)src;
|
|
own_buffer = false;
|
|
buffersize = src_size;
|
|
len = src_size;
|
|
pos = 0;
|
|
}
|
|
|
|
~EMUFILE_MEMFILE() {
|
|
if(own_buffer && buffer) free(buffer);
|
|
}
|
|
|
|
char* buf() { return buffer; }
|
|
|
|
virtual FILE *get_fp() { return NULL; }
|
|
|
|
virtual int fprintf(const char *format, ...) {
|
|
va_list argptr;
|
|
va_start(argptr, format);
|
|
|
|
//we dont generate straight into the buffer because it will null terminate (one more byte than we want)
|
|
int amt = vsnprintf(0,0,format,argptr);
|
|
char* tempbuf = new char[amt+1];
|
|
vsprintf(tempbuf,format,argptr);
|
|
fwrite(tempbuf,amt);
|
|
delete[] tempbuf;
|
|
va_end(argptr);
|
|
return amt;
|
|
};
|
|
|
|
virtual int fgetc() {
|
|
if(pos >= len) {
|
|
failbit = true;
|
|
return -1;
|
|
}
|
|
return (int)buffer[pos++];
|
|
}
|
|
virtual int fputc(int c) {
|
|
if(pos >= buffersize) {
|
|
failbit = true;
|
|
return -1;
|
|
}
|
|
buffer[pos] = (char)c;
|
|
pos++;
|
|
len++;
|
|
return 0;
|
|
}
|
|
|
|
virtual size_t _fread(const void *ptr, size_t bytes){
|
|
u32 remain = len-pos;
|
|
if(remain == 0)
|
|
return 0;
|
|
|
|
u32 todo = std::min<u32>(remain,(u32)bytes);
|
|
memcpy((void*)ptr,buffer+pos,todo);
|
|
pos += todo;
|
|
return todo;
|
|
}
|
|
|
|
virtual void fwrite(const void *ptr, size_t bytes){
|
|
if(pos+bytes > (u32)buffersize) return;
|
|
memcpy(buffer+pos,ptr,bytes);
|
|
pos += bytes;
|
|
len = std::max(pos,len);
|
|
}
|
|
|
|
virtual int fseek(int offset, int origin){
|
|
switch(origin) {
|
|
case SEEK_SET:
|
|
if(offset >= 0 && offset <= len)
|
|
pos = offset;
|
|
else
|
|
return 1; // failure
|
|
break;
|
|
case SEEK_CUR:
|
|
if((pos + offset) >= 0 && (pos + offset) <= len)
|
|
pos += offset;
|
|
else
|
|
return 1; // failure
|
|
break;
|
|
case SEEK_END:
|
|
if((pos + offset) >= 0 && (pos + offset) <= len)
|
|
pos = len + offset;
|
|
else
|
|
return 1; // failure
|
|
break;
|
|
default:
|
|
return 1; // failure
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
virtual int ftell() {
|
|
return pos;
|
|
}
|
|
|
|
void trim()
|
|
{
|
|
|
|
}
|
|
|
|
virtual int size() { return (int)len; }
|
|
};
|
|
#endif
|
|
|
|
class EMUFILE_FILE : public EMUFILE {
|
|
protected:
|
|
FILE* fp;
|
|
|
|
private:
|
|
void open(const char* fname, const char* mode)
|
|
{
|
|
fp = fopen(fname,mode);
|
|
if(!fp)
|
|
failbit = true;
|
|
}
|
|
|
|
public:
|
|
|
|
EMUFILE_FILE(const std::string& fname, const char* mode) { open(fname.c_str(),mode); }
|
|
EMUFILE_FILE(const char* fname, const char* mode) { open(fname,mode); }
|
|
|
|
virtual ~EMUFILE_FILE() {
|
|
if(NULL != fp)
|
|
fclose(fp);
|
|
}
|
|
|
|
virtual FILE *get_fp() {
|
|
return fp;
|
|
}
|
|
|
|
bool is_open() { return fp != NULL; }
|
|
|
|
virtual int fprintf(const char *format, ...) {
|
|
va_list argptr;
|
|
va_start(argptr, format);
|
|
int ret = ::vfprintf(fp, format, argptr);
|
|
va_end(argptr);
|
|
return ret;
|
|
};
|
|
|
|
virtual int fgetc() {
|
|
return ::fgetc(fp);
|
|
}
|
|
virtual int fputc(int c) {
|
|
return ::fputc(c, fp);
|
|
}
|
|
|
|
virtual size_t _fread(const void *ptr, size_t bytes){
|
|
size_t ret = ::fread((void*)ptr, 1, bytes, fp);
|
|
if(ret < bytes)
|
|
failbit = true;
|
|
return ret;
|
|
}
|
|
|
|
//removing these return values for now so we can find any code that might be using them and make sure
|
|
//they handle the return values correctly
|
|
|
|
virtual void fwrite(const void *ptr, size_t bytes){
|
|
size_t ret = ::fwrite((void*)ptr, 1, bytes, fp);
|
|
if(ret < bytes)
|
|
failbit = true;
|
|
}
|
|
|
|
virtual int fseek(int offset, int origin){
|
|
return ::fseek(fp, offset, origin);
|
|
}
|
|
|
|
virtual int ftell() {
|
|
return (u32)::ftell(fp);
|
|
}
|
|
|
|
virtual int size() {
|
|
int oldpos = ftell();
|
|
fseek(0,SEEK_END);
|
|
int len = ftell();
|
|
fseek(oldpos,SEEK_SET);
|
|
return len;
|
|
}
|
|
|
|
};
|
|
|
|
#endif
|