VIRT_FILE *virt_fopen(char *fname, char *flags)
{
VIRT_FILE *f;
f = malloc(sizeof(*f));
if (f==NULL)
{ errno=ENOMEM;
return NULL;
}
if (buf==NULL)
buf=malloc(BUFSIZE);
if (buf==NULL)
{ free(f);
errno=ENOMEM;
return NULL;
}
f->curpos=f->offbody=msgsize=f->lines=f->waslf=0;
#ifdef __MSDOS__
f->file = fopen(fname, flags);
if (f->file==NULL)
{ free(f);
return NULL;
}
strncpy(f->fname, fname, sizeof(f->fname));
#else
f->buf=createbuf(BUFSIZE);
if (f->buf==NULL)
{ free(f);
errno=ENOMEM;
return NULL;
}
f->bufsize=BUFSIZE;
#endif
return f;
}
int aflinbuf(FILE *f, int mem)
{
off_t fsize;
afgetfsize(f, &fsize);
bufsize = ((size_t) mem) * 1048576;
/* printf("aflinbuf: %i %lu %lu\n", mem, (unsigned long) fsize,
(unsigned long) bufsize);*/
bufsize = fsize < bufsize ? fsize : bufsize;
fbuf = f;
if (createbuf() < 0)
return -1;
if (fillbuf() < 0)
return -1;
return 0;
}
