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builtin.c
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builtin.c
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#ifndef __APPLE__
#include <stdio_ext.h>
#endif
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <dirent.h>
#include "npl.h"
void initbuiltin(void)
{
definfix(">", b_greater, 700, XFX);
definfix("<", b_smaller, 700, XFX);
definfix("=<", b_eqsmaller, 700, XFX);
definfix(">=", b_eqgreater, 700, XFX);
definfix("=:=", b_numeq, 700, XFX);
definfix("=\\=", b_notnumeq, 700, XFX);
definfix("=/=", b_notnumeq, 700, XFX);
definfix("@<", b_atsmaller, 700, XFX);
definfix("@=<", b_ateqsmaller, 700, XFX);
definfix("@>", b_atgreater, 700, XFX);
definfix("@>=", b_ateqgreater, 700, XFX);
definfix("is", b_is, 700, XFX);
definfix("=", b_unify, 700, XFX);
definfix("==", b_equalp, 700, XFX);
definfix("\\==", b_notequalp, 700, XFX);
definfix("\\=", b_notunify, 700, XFX);
definfix("=..", b_univ, 700, XFX);
definfix("->", b_ifthen, 1050, XFY);
definfix("\\+", b_not, 900, FY);
definfix("not", b_not, 900, FY);
defbuiltin("!", b_cut, 0);
defbuiltin("%ask", b_ask, -1);
defbuiltin("abolish", b_abolish, 1);
defbuiltin("abort", b_abort, 0);
defbuiltin("ansi_cup", b_ansi_cup, 2);
defbuiltin("ansi_cuu", b_ansi_cuu, 1);
defbuiltin("ansi_cud", b_ansi_cud, 1);
defbuiltin("ansi_cuf", b_ansi_cuf, 1);
defbuiltin("ansi_cub", b_ansi_cub, 1);
defbuiltin("ansi_sgr", b_ansi_sgr, 1);
defbuiltin("ansi_cpr", b_ansi_cpr, 2);
defbuiltin("ansi_scp", b_ansi_scp, 0);
defbuiltin("ansi_rcp", b_ansi_rcp, 0);
defbuiltin("ansi_ed", b_ansi_ed, 0);
defbuiltin("ansi_el", b_ansi_el, 0);
defbuiltin("arg", b_arg, 3);
defbuiltin("arg0", b_arg0, 3);
defbuiltin("assert", b_assert, 1);
defbuiltin("asserta", b_asserta, 1);
defbuiltin("assertz", b_assert, 1);
defbuiltin("atom_concat", b_atom_concat, 3);
defbuiltin("atom", b_atom, 1);
defbuiltin("atom_string", b_atom_string, 2);
defbuiltin("atomic", b_atomic, 1);
defbuiltin("bagof", b_bagof, 3);
defbuiltin("%bagofhelper", b_bagofhelper, -1);
defbuiltin("break", b_break, 0);
defbuiltin("char_code", b_char_code, 2);
defbuiltin("chdir", b_chdir, 1);
defbuiltin("close", b_close, 1);
defbuiltin("clause", b_clause, 2);
defbuiltin("compare", b_compare, 2);
defbuiltin("compound", b_compound, 1);
defbuiltin("concat", b_concat, 3);
defbuiltin("consult", b_consult, 1);
defbuiltin("create", b_create, 2);
defbuiltin("ctr_set", b_ctr_set, 2);
defbuiltin("ctr_dec", b_ctr_dec, 2);
defbuiltin("ctr_inc", b_ctr_inc, 2);
defbuiltin("ctr_is", b_ctr_is, 2);
defbuiltin("current_op", b_current_op, 3);
defbuiltin("current_predicate", b_current_predicate, 1);
defbuiltin("date", b_date, 1);
defbuiltin("date_day", b_date_day, 1);
defbuiltin("dec", b_dec, 2);
defbuiltin("delete", b_delete, 1);
defbuiltin("display", b_display, 1);
defbuiltin("directory", b_directory, 6);
defbuiltin("debug", b_debug, 0);
defbuiltin("dup", b_dup, 2);
defbuiltin("edit", b_edit, 1);
defbuiltin("end_of_file", b_end_of_file, 0);
defbuiltin("eq", b_eq, 2);
defbuiltin("errcode", b_errcode, 1);
defbuiltin("erase", b_erase, 1);
defbuiltin("eraseall", b_eraseall, 1);
defbuiltin("fail", b_fail, 0);
defbuiltin("fileerrors", b_fileerrors, 2);
defbuiltin("findall", b_findall, 3);
defbuiltin("flush", b_flush_output, 0);
defbuiltin("float", b_real, 1);
defbuiltin("float_text", b_float_text, 3);
defbuiltin("functor", b_functor, 3);
defbuiltin("gc", b_gbc, 0);
defbuiltin("get", b_get, list2(1, 2));
defbuiltin("get0", b_get0, list2(1, 2));
defbuiltin("get0_noecho", b_get0_noecho, 1);
defbuiltin("get_code", b_get_code, 1);
defbuiltin("get_byte", b_get_byte, 1);
defbuiltin("ground", b_ground, 1);
defbuiltin("halt", b_halt, 0);
defbuiltin("heapd", b_heapdump, 2);
defbuiltin("ifthen", b_ifthen, 2);
defbuiltin("ifthenelse", b_ifthenelse, 3);
defbuiltin("inc", b_inc, 2);
defbuiltin("instance", b_instance, 2);
defbuiltin("integer", b_integer, 1);
defbuiltin("int_text", b_int_text, 3);
defbuiltin("key", b_key, list2(1, 2));
defbuiltin("keysort", b_keysort, 2);
defbuiltin("leash", b_leash, 1);
defbuiltin("length", b_length, 1);
defbuiltin("listing", b_listing, list3(0, 1, 2));
defbuiltin("list", b_list, 1);
defbuiltin("list_text", b_list_text, 2);
defbuiltin("mkdir", b_mkdir, 1);
defbuiltin("measure", b_measure, 1);
defbuiltin("name", b_name, 2);
defbuiltin("nl", b_nl, list2(0, 1));
defbuiltin("nonvar", b_nonvar, 1);
defbuiltin("nospy", b_nospy, 1);
defbuiltin("notrace", b_notrace, 0);
defbuiltin("nref", b_nref, 2);
defbuiltin("nth_ref", b_nth_ref, 3);
defbuiltin("number", b_number, 1);
defbuiltin("nth_char", b_nth_char, 3);
defbuiltin("op", b_op, 3);
defbuiltin("open", b_open, 3);
defbuiltin("predicate_property", b_predicate_property, 2);
defbuiltin("pref", b_pref, 2);
defbuiltin("put", b_put, 1);
defbuiltin("reconsult", b_reconsult, 1);
defbuiltin("read", b_read, list2(1, 2));
defbuiltin("read_line", b_read_line, 2);
defbuiltin("read_string", b_read_string, list2(2, 3));
defbuiltin("real", b_real, 1);
defbuiltin("record_after", b_record_after, 3);
defbuiltin("recorda", b_recorda, 3);
defbuiltin("recordz", b_recordz, 3);
defbuiltin("recorded", b_recorded, 3);
defbuiltin("recordh", b_recordh, 4);
defbuiltin("ref", b_ref, 1);
defbuiltin("retract", b_retract, 1);
defbuiltin("retrieveh", b_retrieveh, 3);
defbuiltin("removeh", b_removeh, 3);
defbuiltin("removeallh", b_removeallh, 2);
defbuiltin("rename", b_rename, 2);
defbuiltin("replace", b_replace, 2);
defbuiltin("reset_op", b_reset_op, 0);
defbuiltin("reverse", b_reverse, 2);
defbuiltin("rmdir", b_rmdir, 1);
defbuiltin("save", b_save, list2(0, 1));
defbuiltin("see", b_see, 1);
defbuiltin("seeing", b_seeing, 1);
defbuiltin("seen", b_seen, 0);
defbuiltin("setof", b_setof, 3);
defbuiltin("shell", b_shell, 1);
defbuiltin("skip", b_skip, 1);
defbuiltin("sort", b_sort, 2);
defbuiltin("statistics", b_statistics, 2);
defbuiltin("stdin", b_stdin, 2);
defbuiltin("stdinout", b_stdinout, 3);
defbuiltin("stdout", b_stdout, 2);
defbuiltin("string", b_string, 1);
defbuiltin("string_length", b_string_length, 2);
defbuiltin("string_term", b_string_term, 2);
defbuiltin("spy", b_spy, 1);
defbuiltin("substring", b_substring, 3);
defbuiltin("syntaxerrors", b_syntaxerrors, 2);
defbuiltin("system", b_system, 1);
defbuiltin("tab", b_tab, list2(1, 2));
defbuiltin("tell", b_tell, 1);
defbuiltin("telling", b_telling, 1);
defbuiltin("time", b_time, 1);
defbuiltin("told", b_told, 0);
defbuiltin("trace", b_trace, 0);
defbuiltin("true", b_true, 0);
defbuiltin("var", b_var, 1);
defbuiltin("write", b_write, list2(1, 2));
defbuiltin("writeq", b_writeq, list2(1, 2));
defbuiltin("call", b_call, 1);
defbuiltin("repeat", b_repeat, 0);
defbuiltin("append", b_append, 3);
defbuiltin("member", b_member, 2);
defbuiltin("between", b_between, 3);
defbuiltin("existerrors", b_existerrors, 2);
//-----Distributed parallel
defbuiltin("dp_create", b_dp_create, 1);
defbuiltin("dp_close", b_dp_close, 0);
defbuiltin("dp_prove", b_dp_prove, 1);
defbuiltin("dp_and", b_dp_and, 1);
defbuiltin("dp_or", b_dp_or, 1);
defbuiltin("dp_transfer", b_dp_transfer, 1);
defbuiltin("dp_receive", b_dp_receive, -1);
defbuiltin("dp_compile", b_dp_compile, 1);
defbuiltin("dp_consult", b_dp_consult, 1);
defbuiltin("dp_report", b_dp_report, 1);
defbuiltin("dp_countup", b_dp_countup, -1);
defbuiltin("dp_parent", b_dp_parent, 0);
defbuiltin("dp_child", b_dp_child, 0);
defbuiltin("dp_wait", b_dp_wait, 1);
defbuiltin("dp_pause", b_dp_pause, 1);
defbuiltin("dp_resume", b_dp_resume, 1);
//------multi thread--------------------
defbuiltin("mt_create", b_mt_create, 1);
defbuiltin("mt_close", b_mt_close, 1);
defbuiltin("mt_and", b_mt_and, 1);
defbuiltin("mt_or", b_mt_or, 1);
defbuiltin("mt_prove", b_mt_prove, 2);
//-----JUMP project---------
defbuiltin("n_reconsult_predicate", b_reconsult_predicate, -1);
defbuiltin("n_reconsult_abolish", b_reconsult_abolish, -1);
defbuiltin("n_filename", b_filename, -1);
defbuiltin("n_atom_convert", b_atom_convert, -1);
defbuiltin("n_arity_count", b_arity_count, -1);
defbuiltin("n_compiler_anoymous", b_compiler_anoymous, -1);
defbuiltin("n_compiler_variable", b_compiler_variable, -1);
defbuiltin("n_variable_convert", b_variable_convert, -1);
defbuiltin("n_generate_all_variable", b_generate_all_variable, -1);
defbuiltin("n_generate_variable", b_generate_variable, -1);
defbuiltin("n_clause_with_arity", b_clause_with_arity, -1);
defbuiltin("n_property", b_property, -1);
defbuiltin("n_bignum", b_bignum, -1);
defbuiltin("n_longnum", b_longnum, -1);
defbuiltin("n_findatom", b_findatom, -1);
defbuiltin("n_defined_predicate", b_defined_predicate, -1);
defbuiltin("n_defined_userop", b_defined_userop, -1);
defbuiltin("n_get_execute", b_get_execute, -1);
defbuiltin("n_error", b_error, -1);
defbuiltin("n_has_cut", b_has_cut, -1);
defbuiltin("n_before_cut", b_before_cut, -1);
defbuiltin("n_after_cut", b_after_cut, -1);
#ifdef __arm__
defbuiltin("wiringpi_setup_gpio", b_wiringpi_setup_gpio, 2);
defbuiltin("wiringpi_spi_setup_ch_speed",
b_wiringpi_spi_setup_ch_speed, 1);
defbuiltin("pwm_set_mode", b_pwm_set_mode, 1);
defbuiltin("pwm_set_range", b_pwm_set_range, 1);
defbuiltin("pwm_set_clock", b_pwm_set_clock, 1);
defbuiltin("pin_mode", b_pin_mode, 2);
defbuiltin("digital_write", b_digital_write, 2);
defbuiltin("digital_write_byte", b_digital_write_byte, 1);
defbuiltin("pull_up_dn_control", b_pull_up_dn_control, 2);
defbuiltin("digital_read", b_digital_read, 1);
defbuiltin("delay", b_delay, 1);
defbuiltin("delay_microseconds", b_delay_microseconds, 1);
defbuiltin("out", b_digital_write, 2);
defbuiltin("in", b_digital_read, 2);
defbuiltin("timer_microseconds", b_timer_microseconds, 1);
#endif
return;
}
int b_length(int arglist, int rest, int th)
{
int n, arg1, arg2, i, ls, res, save1, save2;
save2 = sp[th];
n = length(arglist);
if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
if (!listp(arg1) && !nullp(arg1) && !wide_variable_p(arg1))
error(NOT_LIST, "length ", arglist,th);
if (listp(arg1) && length(arg1) == -1)
error(WRONG_ARGS, "length ", arglist,th);
if (integerp(arg2) && GET_INT(arg2) < 0)
error(LESS_THAN_ZERO, "length ", arg2,th);
if (!wide_variable_p(arg2) && !integerp(arg2))
error(NOT_INT, "length ", arg2,th);
save1 = wp[th];
if ((listp(arg1) && length(arg1) != -1) || nullp(arg1)) {
if (unify(arg2, makeint(length(arg1)), th) == YES)
return (prove_all(rest, sp[th], th));
} else if (integerp(arg2)) {
i = GET_INT(arg2);
res = NIL;
while (i > 0) {
res = wlistcons(makevariant(th), res, th);
i--;
}
if (unify(arg1, res, th) == YES)
return (prove_all(rest, sp[th], th));
} else if (wide_variable_p(arg1) && wide_variable_p(arg2)) {
ls = NIL;
i = 0;
while (1) {
unify(arg1, ls, th);
unify(arg2, makeint(i), th);
if (prove_all(rest, sp[th], th) == YES)
return (YES);
unbind(save2, th);
i++;
ls = wlistcons(makevariant(th), ls, th);
}
}
wp[th] = save1;
unbind(save2, th);
return (NO);
}
error(ARITY_ERR, "length ", arglist,th);
return (NO);
}
//compiled predicate
int b_repeat(int arglist, int rest, int th)
{
int n, save1, save2, save3;
save1 = wp[th];
save2 = sp[th];
save3 = ac[th];
n = length(arglist);
if (n == 0) {
loop:
if (prove_all(rest, sp[th], th) == YES) {
return (YES);
}
wp[th] = save1;
unbind(save2, th);
ac[th] = save3;
goto loop;
}
error(ARITY_ERR, "repeat ", arglist, th);
return (NO);
}
int b_op(int arglist, int rest, int th)
{
int n, arg1, arg2, arg3, weight, type;
n = length(arglist);
if (n == 3) {
arg1 = car(arglist); //priority
arg2 = cadr(arglist); //specifier
arg3 = caddr(arglist); //operator
if (wide_variable_p(arg1))
error(INSTANTATION_ERR, "op ", arg1,th);
if (wide_variable_p(arg2))
error(INSTANTATION_ERR, "op ", arg2,th);
if (listp(arg3) && length(arg3) == -1)
error(INSTANTATION_ERR, "op ", arg3,th);
if (!integerp(arg1))
error(NOT_INT, "op ", arg1,th);
if (!atomp(arg2))
error(NOT_ATOM, "op ", arg2,th);
if (!atomp(arg3) && !listp(arg3))
error(NOT_ATOM, "op ", arg3,th);
weight = GET_INT(arg1);
if (!(weight > 0 && weight <= 1200))
error(OPE_PRIORITY_ERR, "op ", arg1,th);
if (arg3 == DOTOBJ)
error(MODIFY_OPE_ERR, "op ", arg3,th);
if (arg3 == AND)
error(MODIFY_OPE_ERR, "op ", arg3,th);
if (arg3 == makeatom("op", OPE))
error(MODIFY_OPE_ERR, "op ", arg3,th);
type = NIL;
if (arg2 == makeconst("xfx")) {
type = XFX;
} else if (arg2 == makeconst("yfx")) {
if (GET_OPT(arg3) == XF || GET_OPT(arg3) == YF)
error(OPE_SPEC_ERR, "op", arg2,th);
type = YFX;
} else if (arg2 == makeconst("xfy")) {
if (GET_OPT(arg3) == XF || GET_OPT(arg3) == YF)
error(OPE_SPEC_ERR, "op", arg2,th);
type = XFY;
} else if (arg2 == makeconst("fx"))
type = FX;
else if (arg2 == makeconst("fy"))
type = FY;
else if (arg2 == makeconst("xf")) {
if (GET_OPT(arg3) == XFX || GET_OPT(arg3) == YFX ||
GET_OPT(arg3) == XFY)
error(OPE_SPEC_ERR, "op", arg2,th);
type = XF;
} else if (arg2 == makeconst("yf")) {
if (GET_OPT(arg3) == XFX || GET_OPT(arg3) == YFX ||
GET_OPT(arg3) == XFY)
error(OPE_SPEC_ERR, "op", arg2,th);
type = YF;
} else
error(OPE_SPEC_ERR, "op", arg2,th);
if (singlep(arg3)) {
if (operatorp(arg3))
defoperator(GET_NAME(arg3), NIL, weight, type, 0);
else if (builtinp(arg3))
defoperator(GET_NAME(arg3), NIL, weight, type, 1);
else
defoperator(GET_NAME(arg3), NIL, weight, type, 2);
} else {
while (!nullp(arg3)) {
if (wide_variable_p(car(arg3)))
error(INSTANTATION_ERR, "ope ", car(arg3),th);
else if (!atomp(car(arg3)) && !operatorp(car(arg3)))
error(NOT_ATOM, "ope ", car(arg3),th);
else if (operatorp(car(arg3)))
defoperator(GET_NAME(arg3), NIL, weight, type, 0);
else
defoperator(GET_NAME(car(arg3)), NIL, weight, type, 2);
arg3 = cdr(arg3);
}
}
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "op ", arglist,th);
return (NO);
}
int o_cons(int x, int y, int th)
{
if (operationp(y))
y = operate(y, th);
return (listcons(x, y));
}
int b_ask(int arglist, int rest, int th)
{
int n, x1, x2, x3;
char c;
n = length(arglist);
if (n == 0) {
x1 = variables[th];
if (child_flag)
memset(bridge, 0, sizeof(bridge));
if (nullp(x1) || has_no_value_p(x1, th)) {
if (thread_flag)
proof[0] = proof[0] + proof[th];
return (prove_all(rest, sp[th], th));
// ignore singleton e.g. X=X
}
x2 = NIL;
while (!nullp(x1)) {
if (variablep(car(x1)) && car(x1) != deref(car(x1), th))
x2 = cons(car(x1), x2);
x1 = cdr(x1);
}
x2 = reverse(x2);
// if multi-thread mode unify variables and return YES.
if (thread_flag && th != 0) {
while (!nullp(x2)) {
x3 = convert_to_variant(car(x2), th);
unify(x3, copy_work(deref(car(x2), th), 0), 0);
x2 = cdr(x2);
}
proof[0] = proof[0] + proof[th];
return (YES);
}
if (child_flag) {
bridge_flag = 1;
}
/* if network-mode write to buffer e.g. X = 1,Y = 2,
* normal-mode write to termial
* X = 1
* Y = 2
*/
while (!nullp(x2)) {
print(car(x2));
printstr(" = ");
printanswer(deref(car(x2), th));
if (child_flag)
printc(',');
if (!nullp(cdr(x2)))
printf("\n");
x2 = cdr(x2);
}
if (child_flag) {
bridge_flag = 0;
return (YES);
}
putchar(' ');
fflush(stdout);
fflush(stdin);
loop:
c = n_getch();
if (c == '.' || c == EOL) {
fputs(".\n", stdout);
return (prove_all(rest, sp[th], th));
} else if (c == ';' || c == ' ') {
fputs(";\n", stdout);
return (NO);
} else
goto loop;
return (NO);
}
error(ARITY_ERR, "ask ", arglist, th);
return (NO);
}
int b_unify(int arglist, int rest, int th)
{
int n, arg1, arg2, res;
n = length(arglist);
if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
res = unify(arg1, arg2, th);
if (res == YES)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "= ", arglist, th);
return (NO);
}
int b_notunify(int arglist, int rest, int th)
{
int n, arg1, arg2, res;
n = length(arglist);
if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
if (operationp(arg1))
arg1 = operate(arg1, th);
if (operationp(arg2))
arg2 = operate(arg2, th);
res = unify(arg1, arg2, th);
if (res == NO)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "\\= ", arglist, th);
return (NO);
}
//input and output
int b_write(int arglist, int rest, int th)
{
int n, arg1, arg2, save;
n = length(arglist);
if (n == 1) {
arg1 = output_stream;
arg2 = car(arglist);
goto write;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
write:
if (wide_variable_p(arg1))
error(INSTANTATION_ERR, "write ", arg1, th);
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "write ", arg1, th);
save = output_stream;
if (aliasp(arg1))
output_stream = GET_CAR(arg1);
else
output_stream = arg1;
quoted_flag = 0;
print(arg2);
fflush(GET_PORT(output_stream));
quoted_flag = 1;
output_stream = save;
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "write ", arglist, th);
return (NO);
}
int b_display(int arglist, int rest, int th)
{
int n, arg1, arg2, save;
n = length(arglist);
if (n == 1) {
arg1 = output_stream;
arg2 = car(arglist);
goto display;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
display:
if (wide_variable_p(arg1))
error(INSTANTATION_ERR, "display ", arg1, th);
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "display ", arg1, th);
save = output_stream;
if (aliasp(arg1))
output_stream = GET_CAR(arg1);
else
output_stream = arg1;
quoted_flag = 1;
ignore_flag = 1;
print(arg2);
quoted_flag = 0;
ignore_flag = 0;
output_stream = save;
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "display ", arglist, th);
return (NO);
}
int b_writeq(int arglist, int rest, int th)
{
int n, arg1, arg2, save;
n = length(arglist);
if (n == 1) {
arg1 = output_stream;
arg2 = car(arglist);
goto writeq;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
writeq:
if (wide_variable_p(arg1))
error(INSTANTATION_ERR, "writeq ", arg1, th);
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "writeq ", arg1, th);
save = output_stream;
if (aliasp(arg1))
output_stream = GET_CAR(arg1);
else
output_stream = arg1;
quoted_flag = 1;
print(arg2);
quoted_flag = 0;
output_stream = save;
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "writeq ", arglist, th);
return (NO);
}
int b_nl(int arglist, int rest, int th)
{
int n, arg1, save;
n = length(arglist);
if (n == 0) {
fprintf(GET_PORT(output_stream), "\n");
fflush(GET_PORT(output_stream));
return (prove_all(rest, sp[th], th));
} else if (n == 1) {
arg1 = car(arglist);
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "nl ", arg1, th);
save = output_stream;
if (aliasp(arg1))
output_stream = GET_CAR(arg1);
else
output_stream = arg1;
fprintf(GET_PORT(output_stream), "\n");
fflush(GET_PORT(output_stream));
output_stream = save;
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "nl ", arglist, th);
return (NO);
}
int b_put(int arglist, int rest, int th)
{
int n, arg1, arg2;
n = length(arglist);
if (n == 1) {
arg1 = output_stream;
arg2 = car(arglist);
goto put;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
put:
if (!integerp(arg2))
error(NOT_INT, "put ", arg1, th);
fprintf(GET_PORT(arg1), "%c", (char) GET_INT(arg2));
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "put ", arglist, th);
return (NO);
}
int b_get0(int arglist, int rest, int th)
{
int n, c, arg1, arg2, i, res;
n = length(arglist);
if (n == 1) {
arg1 = input_stream;
arg2 = car(arglist);
goto get0;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
get0:
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "get0 ", arg1, th);
if (!wide_variable_p(arg2) && !integerp(arg2))
error(NOT_VAR, "get0 ", arg2, th);
if (aliasp(arg1))
arg1 = GET_CAR(arg1);
if (n == 1)
c = n_getch();
else
c = getc(GET_PORT(arg1));
if (c == EOF)
return (NO);
i = makeint((int) c);
res = unify(arg2, i, th);
if (res == YES)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "get0 ", arglist, th);
return (NO);
}
int b_get(int arglist, int rest, int th)
{
int n, c, arg1, arg2, i, res;
n = length(arglist);
if (n == 1) {
arg1 = input_stream;
arg2 = car(arglist);
goto get;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
get:
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "get ", arg1, th);
if (!wide_variable_p(arg2) && !integerp(arg2))
error(NOT_VAR, "get ", arg2, th);
if (aliasp(arg1))
arg1 = GET_CAR(arg1);
loop:
if (n == 1)
c = n_getch();
else
c = getc(GET_PORT(arg1));
if (c == EOF)
return (NO);
i = (int) c;
if (c == EOL)
goto exit;
if (i < 33)
goto loop;
exit:
res = unify(arg2, makeint(i), th);
if (res == YES)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "get ", arglist, th);
return (NO);
}
int b_get0_noecho(int arglist, int rest, int th)
{
int n, c, arg1, i, res;
n = length(arglist);
if (n == 1) {
arg1 = car(arglist);
c = n_getch();
i = makeint((int) c);
res = unify(arg1, i, th);
if (res == YES)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "get0_noecho ", arglist, th);
return (NO);
}
int b_get_code(int arglist, int rest, int th)
{
int n, arg1, arg2, c, i, res;
char str[10];
n = length(arglist);
if (n == 1) {
arg1 = input_stream;
arg2 = car(arglist);
goto get_code;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
get_code:
if (wide_variable_p(arg1))
error(INSTANTATION_ERR, "get_code ", arg1, th);
if (!wide_variable_p(arg2) && !integerp(arg2))
error(NOT_INT, "get_code ", arg2, th);
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "get_code ", arg1, th);
if (aliasp(arg1))
arg1 = GET_CAR(arg1);
c = getc(GET_PORT(arg1));
if (isUni2(c)) {
str[0] = c;
str[1] = getc(GET_PORT(arg1));
str[2] = NUL;
i = utf8_to_ucs4(str);
} else if (isUni3(c)) {
str[0] = c;
str[1] = getc(GET_PORT(arg1));
str[2] = getc(GET_PORT(arg1));
str[3] = NUL;
i = utf8_to_ucs4(str);
} else if (isUni4(c)) {
str[0] = c;
str[1] = getc(GET_PORT(arg1));
str[2] = getc(GET_PORT(arg1));
str[3] = getc(GET_PORT(arg1));
str[4] = NUL;
i = utf8_to_ucs4(str);
} else if (isUni5(c)) {
str[0] = c;
str[1] = getc(GET_PORT(arg1));
str[2] = getc(GET_PORT(arg1));
str[3] = getc(GET_PORT(arg1));
str[4] = getc(GET_PORT(arg1));
str[5] = NUL;
i = utf8_to_ucs4(str);
} else if (isUni6(c)) {
str[0] = c;
str[1] = getc(GET_PORT(arg1));
str[2] = getc(GET_PORT(arg1));
str[3] = getc(GET_PORT(arg1));
str[4] = getc(GET_PORT(arg1));
str[5] = getc(GET_PORT(arg1));
str[6] = NUL;
i = utf8_to_ucs4(str);
} else {
i = c;
}
res = NIL;
res = unify(arg2, makeint(i), th);
if (res == YES)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "get_code ", arglist, th);
return (NO);
}
int b_get_byte(int arglist, int rest, int th)
{
int n, arg1, arg2, c, res;
n = length(arglist);
if (n == 1) {
arg1 = input_stream;
arg2 = car(arglist);
goto get_byte;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
get_byte:
if (wide_variable_p(arg1))
error(INSTANTATION_ERR, "get_byte ", arg1, th);
if (!wide_variable_p(arg2) && !integerp(arg2))
error(NOT_INT, "get_byte ", arg2, th);
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "get_byte ", arg1, th);
if (aliasp(arg1))
arg1 = GET_CAR(arg1);
c = fgetc(GET_PORT(arg1));
res = unify(arg2, makeint(c), th);
if (res == YES)
return (prove_all(rest, sp[th], th));
else
return (NO);
}
error(ARITY_ERR, "get_byte ", arglist, th);
return (NO);
}
int b_tab(int arglist, int rest, int th)
{
int n, arg1, arg2, count;
n = length(arglist);
if (n == 1) {
arg1 = standard_output;
arg2 = car(arglist);
goto tab;
} else if (n == 2) {
arg1 = car(arglist);
arg2 = cadr(arglist);
tab:
if (!streamp(arg1) && !aliasp(arg1))
error(NOT_STREAM, "tab ", arg1, th);
if (integerp(arg2) && GET_INT(arg2) < 0)
error(LESS_THAN_ZERO, "tab", arg2, th);
if (!integerp(arg2))
error(NOT_INT, "tab", arg2, th);
if (aliasp(arg1))
arg1 = GET_CAR(arg1);
count = GET_INT(arg2);
while (count > 0) {
fprintf(GET_PORT(arg1), " ");
count--;
}
return (prove_all(rest, sp[th], th));
}
error(ARITY_ERR, "tab ", arglist, th);
return (NO);
}
//option for read_term [variable_names(X)]
int variable_name_p(int x)
{
if (eqlp(car(x), makeconst("variable_names")) &&
(wide_variable_p(cadr(x)) || listp(cadr(x))) && nullp(cddr(x)))
return (1);
else
return (0);
}
//option for read_term [singletons(X)]