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fix assert_port_profile to show clearer error message

This commit is contained in:
Yuichi Nishiwaki 2014-01-13 01:47:15 +09:00
parent ec9305e9a5
commit 19a561132e
1 changed files with 23 additions and 9 deletions
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32
src/port.c
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@ -352,13 +352,27 @@ pic_port_close_port(pic_state *pic)
return pic_none_value();
}
#define assert_port_profile(port, flgs, stat, caller) do { \
if ((port->flags & flgs) != flgs) { \
pic_error(pic, caller ": expected input port"); \
} \
if (port->status != stat) { \
pic_error(pic, caller ": expected open port"); \
} \
#define assert_port_profile(port, flgs, stat, caller) do { \
if ((port->flags & (flgs)) != (flgs)) { \
switch (flgs) { \
case PIC_PORT_IN | PIC_PORT_TEXT: \
pic_error(pic, caller ": expected input/textual port"); \
case PIC_PORT_IN | PIC_PORT_BINARY: \
pic_error(pic, caller ": expected input/binary port"); \
case PIC_PORT_OUT | PIC_PORT_TEXT: \
pic_error(pic, caller ": expected output/textual port"); \
case PIC_PORT_OUT | PIC_PORT_BINARY: \
pic_error(pic, caller ": expected output/binary port"); \
} \
} \
if (port->status != stat) { \
switch (stat) { \
case PIC_PORT_OPEN: \
pic_error(pic, caller ": expected open port"); \
case PIC_PORT_CLOSE: \
pic_error(pic, caller ": expected close port"); \
} \
} \
} while (0)
static pic_value
@ -369,7 +383,7 @@ pic_port_read_char(pic_state *pic)
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN, PIC_PORT_OPEN, "read-char");
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "read-char");
if ((c = fgetc(port->file)) == EOF) {
return pic_eof_object();
@ -387,7 +401,7 @@ pic_port_peek_char(pic_state *pic)
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN, PIC_PORT_OPEN, "peek-char");
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "peek-char");
if ((c = fgetc(port->file)) == EOF) {
return pic_eof_object();