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Beginning extensions to I/O

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This commit is contained in:
Justin Ethier 2015-06-08 20:54:52 -04:00
parent f94ddd9da9
commit 21d9771159
1 changed files with 18 additions and 2 deletions
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20
runtime.c
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@ -282,11 +282,27 @@ object Cyc_has_cycle(object lst) {
}
}
object Cyc_display(x) object x;
// TODO: need to change I/O functions (including display/write below)
// to accept an optional port arg. also, if port is not specified, should
// use (current-output-port) instead of stdout. will need to expose the
// (current-*port) functions somehow (tricky since we do not have param
// object yet) then figure out how to use them.
//
// If port is omitted from any output procedure, it defaults
// to the value returned by (current-output-port). It is an
// error to attempt an output operation on a closed port
//
//object dispatch_display_va(int argc, object x, ...) {
//object Cyc_display_va(int argc, object x, ...) {
// object Cyc_display_va_list(int argc, object x, va_list ap) {
TODO: change all printf's below:
object Cyc_display(object x, FILE *port)
{object tmp = nil;
object has_cycle = boolean_f;
int i = 0;
if (nullp(x)) {printf("()"); return x;}
if (nullp(x)) {fprintf(port, "()"); return x;}
if (obj_is_char(x)) {printf("%c", obj_obj2char(x)); return x;}
switch (type_of(x))
{case closure0_tag: