looper/file_backend.hpp

#pragma once
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stddef.h>
#include <SDL.h>
#include <vector>
extern "C" {
#include <vgmstream.h>
}
enum class SeekType {
    SET,
    CUR,
    END
};
class File {
    protected:
    size_t len;
    public:
    const char *name;
    File(const char *fname);
    inline virtual void open(const char *fname) { name = fname; }
    inline virtual void close() { }
    virtual size_t read(void *ptr, size_t size, size_t len) = 0;
    virtual void seek(size_t pos, SeekType seek_type) = 0;
    virtual size_t get_len();
    virtual size_t get_pos() = 0;
    inline virtual bool is_open() {
        return false;
    }
    inline virtual ~File() {
        if (is_open()) close();
    }
};
class CFile : public File {
    protected:
    FILE *file;
    public:
    CFile(const char *fname);
    void open(const char *fname) override;
    void close() override;
    size_t read(void *ptr, size_t size, size_t len) override;
    void seek(size_t pos, SeekType seek_type) override;
    size_t get_pos() override;
    bool is_open() override;
};
class HttpFile : public File {
    std::vector<uint8_t> data;
    public:
    HttpFile(const char *url);
    void open(const char *url) override;
    void close() override;
    size_t read(void *ptr, size_t size, size_t len) override;
    void seek(size_t pos, SeekType type) override;
    size_t get_pos();
    bool is_open();
};
#ifdef __ANDROID__
class AndroidFile : public File {
    protected:
    void *handle;
    public:
    AndroidFile(const char *fname);
    void open(const char *fname) override;
    void close() override;
    size_t read(void *ptr, size_t size, size_t len) override;
    void seek(size_t pos, SeekType seek_type) override;
    size_t get_pos() override;
    bool is_open() override;
}
#endif
#ifdef __ANDROID__
#define FILE_TYPE AndroidFile
#else
#define FILE_TYPE CFile
#endif
STREAMFILE *get_sf_from_file(File *file);
SDL_RWops *get_sdl_file(File *file);
File *open_file(const char *fname);
File *open_url(const char *url);