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add line_count/2 built-in

This commit is contained in:
Vítor Santos Costa 2015-11-13 13:21:45 +00:00
parent 120d6ff19a
commit 5d5ac22834
1 changed files with 4 additions and 4 deletions
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8
os/streams.c
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@ -998,13 +998,13 @@ static Int p_file_name(USES_REGS1) {
return Yap_unify_constant(ARG2, tout);
}
static Int p_cur_line_no(USES_REGS1) { /* '$current_line_number'(+Stream,-N) */
static Int line_count(USES_REGS1) { /* '$current_line_number'(+Stream,-N) */
Term tout;
int sno =
Yap_CheckStream(ARG1, Input_Stream_f | Output_Stream_f | Append_Stream_f,
"current_line_number/2");
if (sno < 0)
return (FALSE);
return (false);
/* one has to be somewhat more careful because of terminals */
if (GLOBAL_Stream[sno].status & Tty_Stream_f) {
Int no = 1;
@ -1396,8 +1396,6 @@ void Yap_InitIOStreams(void) {
SafePredFlag | SyncPredFlag | HiddenPredFlag);
Yap_InitCPred("$check_stream", 1, p_check_if_stream,
SafePredFlag | SyncPredFlag | HiddenPredFlag | HiddenPredFlag);
Yap_InitCPred("$current_line_number", 2, p_cur_line_no,
SafePredFlag | SyncPredFlag | HiddenPredFlag);
Yap_InitCPred("$line_position", 2, p_line_position,
SafePredFlag | SyncPredFlag | HiddenPredFlag);
Yap_InitCPred("$character_count", 2, p_character_count,
@ -1418,6 +1416,8 @@ void Yap_InitIOStreams(void) {
Yap_InitCPred("stream_select", 3, p_stream_select,
SafePredFlag | SyncPredFlag);
#endif
Yap_InitCPred("line_count", 2, line_count,
SafePredFlag | SyncPredFlag );
Yap_InitCPred("$show_stream_position", 2, p_show_stream_position,
SafePredFlag | SyncPredFlag | HiddenPredFlag);
Yap_InitCPred("set_stream_position", 2, set_stream_position,