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add write-char and flush-output-port

This commit is contained in:
Yuichi Nishiwaki 2014-01-13 02:06:09 +09:00
parent a232defd00
commit 4a14531702
1 changed files with 33 additions and 0 deletions
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33
src/port.c
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@ -348,6 +348,10 @@ pic_port_close_port(pic_state *pic)
#define assert_port_profile(port, flgs, stat, caller) do { \
if ((port->flags & (flgs)) != (flgs)) { \
switch (flgs) { \
case PIC_PORT_IN: \
pic_error(pic, caller ": expected output port"); \
case PIC_PORT_OUT: \
pic_error(pic, caller ": expected input port"); \
case PIC_PORT_IN | PIC_PORT_TEXT: \
pic_error(pic, caller ": expected input/textual port"); \
case PIC_PORT_IN | PIC_PORT_BINARY: \
@ -428,6 +432,33 @@ pic_port_write_simple(pic_state *pic)
return pic_none_value();
}
static pic_value
pic_port_write_char(pic_state *pic)
{
char c;
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "c|p", &c, &port);
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, PIC_PORT_OPEN, "write-char");
fputc(c, port->file);
return pic_none_value();
}
static pic_value
pic_port_flush(pic_state *pic)
{
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_OUT, PIC_PORT_OPEN, "flush-output-port");
fflush(port->file);
return pic_none_value();
}
void
pic_init_port(pic_state *pic)
{
@ -454,6 +485,8 @@ pic_init_port(pic_state *pic)
/* write */
pic_defun(pic, "newline", pic_port_newline);
pic_defun(pic, "write-char", pic_port_write_char);
pic_defun(pic, "flush-output-port", pic_port_flush);
DEFLIBRARY(pic, "(scheme write)")
{