file_input_stream.h

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#pragma once
 
/* ************************************************************************** */
/*      ____    _    _____ ____     _    _   _   _____ _  _   ____  ____      */
/*     / ___|  / \  |  ___|  _ \   / \  | \ | | |_   _| || | |  _ \/ ___|     */
/*     \___ \ / _ \ | |_  | |_) | / _ \ |  \| |   | | | || |_| | | \___ \     */
/*      ___) / ___ \|  _| |  _ < / ___ \| |\  |   | | |__   _| |_| |___) |    */
/*     |____/_/   \_|_|   |_| \_/_/   \_|_| \_|   |_|    |_| |____/|____/     */
/*                                                                            */
/* ************************************************************************** */
 
#include "o2s/input_stream.h"
 
#include <signal.h>  // siginfo_t
#include <stdbool.h> // bool
#include <stdint.h>  // uint*_t
#include <stdio.h>   // ssize_t

typedef struct file_input_stream
{
    istream_t stream;     
    int       descriptor; 
    bool      opened;     
} ifstream_t;

ifstream_t file_open(const char* file_name, int flags);
ifstream_t file_from_descriptor(int descriptor);
void       file_close(ifstream_t* file);

ssize_t    file_single_read(ifstream_t* file);
bool       file_accumulate(ifstream_t* file, size_t count);
bool       file_accumulate_infinite(ifstream_t* file, size_t count);
 
void       file_stop_reading(void);
void       file_resume_reading(void);
 
void       file_default_signal_handler(int, siginfo_t*, void*);

#define FileInputStream __attribute__((cleanup(file_close))) ifstream_t