source: lib/ior-stdio.c @ 15e9390

#include "wandio.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

struct stdio_t {
        int fd;
};

extern io_source_t stdio_source;

#define DATA(io) ((struct stdio_t *)((io)->data))

io_t *stdio_open(const char *filename)
{
        io_t *io = malloc(sizeof(io_t));
        io->data = malloc(sizeof(struct stdio_t));

        if (strcmp(filename,"-") == 0)
                DATA(io)->fd = 0; /* STDIN */
        else
                DATA(io)->fd = open(filename,O_RDONLY);
        io->source = &stdio_source;

        if (DATA(io)->fd == -1) {
                free(io);
                return NULL;
        }

        return io;
}

static off_t stdio_read(io_t *io, void *buffer, off_t len)
{
        return read(DATA(io)->fd,buffer,len);
}

static off_t stdio_tell(io_t *io)
{
        return lseek(DATA(io)->fd, 0, SEEK_CUR);
}

static off_t stdio_seek(io_t *io, off_t offset, int whence)
{
        return lseek(DATA(io)->fd, offset, whence);
}

static void stdio_close(io_t *io)
{
        close(DATA(io)->fd);
        free(io->data);
        free(io);
}

io_source_t stdio_source = {
        "stdio",
        stdio_read,
        NULL,
        stdio_tell,
        stdio_seek,
        stdio_close
};