sexp sexp_fdopen (sexp ctx, sexp self, sexp_sint_t n, sexp fd, sexp mode) {
FILE *f;
if (! sexp_integerp(fd))
return sexp_type_exception(ctx, self, SEXP_FIXNUM, fd);
if (! sexp_stringp(mode))
return sexp_type_exception(ctx, self, SEXP_STRING, mode);
f = fdopen(sexp_unbox_fixnum(fd), sexp_string_data(mode));
if (! f)
return sexp_user_exception(ctx, SEXP_FALSE, "fdopen failed", fd);
/* maybe use fd2path to get the name of the fd */
if (sexp_string_data(mode)[0] == 'w')
return sexp_make_output_port(ctx, f, SEXP_FALSE);
else
return sexp_make_input_port(ctx, f, SEXP_FALSE);
}
static sexp sexp_make_custom_port (sexp ctx, sexp self, char *mode,
sexp read, sexp write,
sexp seek, sexp close) {
FILE *in;
sexp res;
sexp_gc_var1(vec);
if (sexp_truep(read) && ! sexp_procedurep(read))
return sexp_type_exception(ctx, self, SEXP_PROCEDURE, read);
if (sexp_truep(write) && ! sexp_procedurep(write))
return sexp_type_exception(ctx, self, SEXP_PROCEDURE, write);
if (sexp_truep(seek) && ! sexp_procedurep(seek))
return sexp_type_exception(ctx, self, SEXP_PROCEDURE, seek);
if (sexp_truep(close) && ! sexp_procedurep(close))
return sexp_type_exception(ctx, self, SEXP_PROCEDURE, close);
sexp_gc_preserve1(ctx, vec);
vec = sexp_make_vector(ctx, SEXP_SIX, SEXP_VOID);
sexp_cookie_ctx_set(vec, ctx);
sexp_cookie_buffer_set(vec, sexp_make_string(ctx, sexp_make_fixnum(SEXP_PORT_BUFFER_SIZE), SEXP_VOID));
sexp_cookie_read_set(vec, read);
sexp_cookie_write_set(vec, write);
sexp_cookie_seek_set(vec, seek);
sexp_cookie_close_set(vec, close);
#if SEXP_BSD
in = funopen(vec,
(sexp_procedurep(read) ? sexp_cookie_reader : NULL),
(sexp_procedurep(write) ? sexp_cookie_writer : NULL),
NULL, /* (sexp_procedurep(seek) ? sexp_cookie_reader : NULL), */
(sexp_procedurep(close) ? sexp_cookie_cleaner : NULL));
#else
in = fopencookie(vec, mode, (sexp_truep(seek) ? sexp_cookie : sexp_cookie_no_seek));
#endif
if (! in) {
res = sexp_user_exception(ctx, self, "couldn't make custom port", read);
} else {
res = sexp_make_input_port(ctx, in, SEXP_FALSE);
sexp_port_cookie(res) = vec; /* for gc preserving */
}
if (mode && mode[0] == 'w')
sexp_pointer_tag(res) = SEXP_OPORT;
sexp_gc_release1(ctx);
return res;
}
