diff options
Diffstat (limited to 'src/scheme/ao_scheme_builtin.c')
| -rw-r--r-- | src/scheme/ao_scheme_builtin.c | 868 |
1 files changed, 868 insertions, 0 deletions
diff --git a/src/scheme/ao_scheme_builtin.c b/src/scheme/ao_scheme_builtin.c new file mode 100644 index 00000000..49f218f6 --- /dev/null +++ b/src/scheme/ao_scheme_builtin.c @@ -0,0 +1,868 @@ +/* + * Copyright © 2016 Keith Packard <keithp@keithp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include "ao_scheme.h" +#include <limits.h> +#include <math.h> + +static int +builtin_size(void *addr) +{ + (void) addr; + return sizeof (struct ao_scheme_builtin); +} + +static void +builtin_mark(void *addr) +{ + (void) addr; +} + +static void +builtin_move(void *addr) +{ + (void) addr; +} + +const struct ao_scheme_type ao_scheme_builtin_type = { + .size = builtin_size, + .mark = builtin_mark, + .move = builtin_move +}; + +#ifdef AO_SCHEME_MAKE_CONST + +#define AO_SCHEME_BUILTIN_CASENAME +#include "ao_scheme_builtin.h" + +char *ao_scheme_args_name(uint8_t args) { + args &= AO_SCHEME_FUNC_MASK; + switch (args) { + case AO_SCHEME_FUNC_LAMBDA: return ao_scheme_poly_atom(_ao_scheme_atom_lambda)->name; + case AO_SCHEME_FUNC_NLAMBDA: return ao_scheme_poly_atom(_ao_scheme_atom_nlambda)->name; + case AO_SCHEME_FUNC_MACRO: return ao_scheme_poly_atom(_ao_scheme_atom_macro)->name; + default: return "???"; + } +} +#else + +#define AO_SCHEME_BUILTIN_ARRAYNAME +#include "ao_scheme_builtin.h" + +static char * +ao_scheme_builtin_name(enum ao_scheme_builtin_id b) { + if (b < _builtin_last) + return ao_scheme_poly_atom(builtin_names[b])->name; + return "???"; +} + +static const ao_poly ao_scheme_args_atoms[] = { + [AO_SCHEME_FUNC_LAMBDA] = _ao_scheme_atom_lambda, + [AO_SCHEME_FUNC_NLAMBDA] = _ao_scheme_atom_nlambda, + [AO_SCHEME_FUNC_MACRO] = _ao_scheme_atom_macro, +}; + +char * +ao_scheme_args_name(uint8_t args) +{ + args &= AO_SCHEME_FUNC_MASK; + if (args < sizeof ao_scheme_args_atoms / sizeof ao_scheme_args_atoms[0]) + return ao_scheme_poly_atom(ao_scheme_args_atoms[args])->name; + return "(unknown)"; +} +#endif + +void +ao_scheme_builtin_write(ao_poly b) +{ + struct ao_scheme_builtin *builtin = ao_scheme_poly_builtin(b); + printf("%s", ao_scheme_builtin_name(builtin->func)); +} + +ao_poly +ao_scheme_check_argc(ao_poly name, struct ao_scheme_cons *cons, int min, int max) +{ + int argc = 0; + + while (cons && argc <= max) { + argc++; + cons = ao_scheme_cons_cdr(cons); + } + if (argc < min || argc > max) + return ao_scheme_error(AO_SCHEME_INVALID, "%s: invalid arg count", ao_scheme_poly_atom(name)->name); + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_arg(struct ao_scheme_cons *cons, int argc) +{ + if (!cons) + return AO_SCHEME_NIL; + while (argc--) { + if (!cons) + return AO_SCHEME_NIL; + cons = ao_scheme_cons_cdr(cons); + } + return cons->car; +} + +ao_poly +ao_scheme_check_argt(ao_poly name, struct ao_scheme_cons *cons, int argc, int type, int nil_ok) +{ + ao_poly car = ao_scheme_arg(cons, argc); + + if ((!car && !nil_ok) || ao_scheme_poly_type(car) != type) + return ao_scheme_error(AO_SCHEME_INVALID, "%s: arg %d invalid type %v", ao_scheme_poly_atom(name)->name, argc, car); + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_do_car(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_car, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_car, cons, 0, AO_SCHEME_CONS, 0)) + return AO_SCHEME_NIL; + return ao_scheme_poly_cons(cons->car)->car; +} + +ao_poly +ao_scheme_do_cdr(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_cdr, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_cdr, cons, 0, AO_SCHEME_CONS, 0)) + return AO_SCHEME_NIL; + return ao_scheme_poly_cons(cons->car)->cdr; +} + +ao_poly +ao_scheme_do_cons(struct ao_scheme_cons *cons) +{ + ao_poly car, cdr; + if(!ao_scheme_check_argc(_ao_scheme_atom_cons, cons, 2, 2)) + return AO_SCHEME_NIL; + car = ao_scheme_arg(cons, 0); + cdr = ao_scheme_arg(cons, 1); + return ao_scheme__cons(car, cdr); +} + +ao_poly +ao_scheme_do_last(struct ao_scheme_cons *cons) +{ + struct ao_scheme_cons *list; + if (!ao_scheme_check_argc(_ao_scheme_atom_last, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_last, cons, 0, AO_SCHEME_CONS, 1)) + return AO_SCHEME_NIL; + for (list = ao_scheme_poly_cons(ao_scheme_arg(cons, 0)); + list; + list = ao_scheme_cons_cdr(list)) + { + if (!list->cdr) + return list->car; + } + return AO_SCHEME_NIL; +} + +ao_poly +ao_scheme_do_length(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_length, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_length, cons, 0, AO_SCHEME_CONS, 1)) + return AO_SCHEME_NIL; + return ao_scheme_int_poly(ao_scheme_cons_length(ao_scheme_poly_cons(ao_scheme_arg(cons, 0)))); +} + +ao_poly +ao_scheme_do_quote(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_quote, cons, 1, 1)) + return AO_SCHEME_NIL; + return ao_scheme_arg(cons, 0); +} + +ao_poly +ao_scheme_do_set(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_set, cons, 2, 2)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_set, cons, 0, AO_SCHEME_ATOM, 0)) + return AO_SCHEME_NIL; + + return ao_scheme_atom_set(ao_scheme_arg(cons, 0), ao_scheme_arg(cons, 1)); +} + +ao_poly +ao_scheme_do_def(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_def, cons, 2, 2)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_def, cons, 0, AO_SCHEME_ATOM, 0)) + return AO_SCHEME_NIL; + + return ao_scheme_atom_def(ao_scheme_arg(cons, 0), ao_scheme_arg(cons, 1)); +} + +ao_poly +ao_scheme_do_setq(struct ao_scheme_cons *cons) +{ + ao_poly name; + if (!ao_scheme_check_argc(_ao_scheme_atom_set21, cons, 2, 2)) + return AO_SCHEME_NIL; + name = cons->car; + if (ao_scheme_poly_type(name) != AO_SCHEME_ATOM) + return ao_scheme_error(AO_SCHEME_INVALID, "set! of non-atom %v", name); + if (!ao_scheme_atom_ref(name, NULL)) + return ao_scheme_error(AO_SCHEME_INVALID, "atom %v not defined", name); + return ao_scheme__cons(_ao_scheme_atom_set, + ao_scheme__cons(ao_scheme__cons(_ao_scheme_atom_quote, + ao_scheme__cons(name, AO_SCHEME_NIL)), + cons->cdr)); +} + +ao_poly +ao_scheme_do_cond(struct ao_scheme_cons *cons) +{ + ao_scheme_set_cond(cons); + return AO_SCHEME_NIL; +} + +ao_poly +ao_scheme_do_begin(struct ao_scheme_cons *cons) +{ + ao_scheme_stack->state = eval_begin; + ao_scheme_stack->sexprs = ao_scheme_cons_poly(cons); + return AO_SCHEME_NIL; +} + +ao_poly +ao_scheme_do_while(struct ao_scheme_cons *cons) +{ + ao_scheme_stack->state = eval_while; + ao_scheme_stack->sexprs = ao_scheme_cons_poly(cons); + return AO_SCHEME_NIL; +} + +ao_poly +ao_scheme_do_write(struct ao_scheme_cons *cons) +{ + ao_poly val = AO_SCHEME_NIL; + while (cons) { + val = cons->car; + ao_scheme_poly_write(val); + cons = ao_scheme_cons_cdr(cons); + if (cons) + printf(" "); + } + printf("\n"); + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_do_display(struct ao_scheme_cons *cons) +{ + ao_poly val = AO_SCHEME_NIL; + while (cons) { + val = cons->car; + ao_scheme_poly_display(val); + cons = ao_scheme_cons_cdr(cons); + } + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_math(struct ao_scheme_cons *orig_cons, enum ao_scheme_builtin_id op) +{ + struct ao_scheme_cons *cons = cons; + ao_poly ret = AO_SCHEME_NIL; + + for (cons = orig_cons; cons; cons = ao_scheme_cons_cdr(cons)) { + ao_poly car = cons->car; + uint8_t rt = ao_scheme_poly_type(ret); + uint8_t ct = ao_scheme_poly_type(car); + + if (cons == orig_cons) { + ret = car; + if (cons->cdr == AO_SCHEME_NIL) { + switch (op) { + case builtin_minus: + if (ao_scheme_integer_typep(ct)) + ret = ao_scheme_integer_poly(-ao_scheme_poly_integer(ret)); + else if (ct == AO_SCHEME_FLOAT) + ret = ao_scheme_float_get(-ao_scheme_poly_number(ret)); + break; + case builtin_divide: + if (ao_scheme_integer_typep(ct) && ao_scheme_poly_integer(ret) == 1) + ; + else if (ao_scheme_number_typep(ct)) { + float v = ao_scheme_poly_number(ret); + ret = ao_scheme_float_get(1/v); + } + break; + default: + break; + } + } + } else if (ao_scheme_integer_typep(rt) && ao_scheme_integer_typep(ct)) { + int32_t r = ao_scheme_poly_integer(ret); + int32_t c = ao_scheme_poly_integer(car); + int64_t t; + + switch(op) { + case builtin_plus: + r += c; + check_overflow: + if (r < AO_SCHEME_MIN_BIGINT || AO_SCHEME_MAX_BIGINT < r) + goto inexact; + break; + case builtin_minus: + r -= c; + goto check_overflow; + break; + case builtin_times: + t = (int64_t) r * (int64_t) c; + if (t < AO_SCHEME_MIN_BIGINT || AO_SCHEME_MAX_BIGINT < t) + goto inexact; + r = (int32_t) t; + break; + case builtin_divide: + if (c != 0 && (r % c) == 0) + r /= c; + else + goto inexact; + break; + case builtin_quotient: + if (c == 0) + return ao_scheme_error(AO_SCHEME_DIVIDE_BY_ZERO, "quotient by zero"); + if (r % c != 0 && (c < 0) != (r < 0)) + r = r / c - 1; + else + r = r / c; + break; + case builtin_remainder: + if (c == 0) + return ao_scheme_error(AO_SCHEME_DIVIDE_BY_ZERO, "remainder by zero"); + r %= c; + break; + case builtin_modulo: + if (c == 0) + return ao_scheme_error(AO_SCHEME_DIVIDE_BY_ZERO, "modulo by zero"); + r %= c; + if ((r < 0) != (c < 0)) + r += c; + break; + default: + break; + } + ret = ao_scheme_integer_poly(r); + } else if (ao_scheme_number_typep(rt) && ao_scheme_number_typep(ct)) { + float r, c; + inexact: + r = ao_scheme_poly_number(ret); + c = ao_scheme_poly_number(car); + switch(op) { + case builtin_plus: + r += c; + break; + case builtin_minus: + r -= c; + break; + case builtin_times: + r *= c; + break; + case builtin_divide: + r /= c; + break; + case builtin_quotient: + case builtin_remainder: + case builtin_modulo: + return ao_scheme_error(AO_SCHEME_INVALID, "non-integer value in integer divide"); + default: + break; + } + ret = ao_scheme_float_get(r); + } + + else if (rt == AO_SCHEME_STRING && ct == AO_SCHEME_STRING && op == builtin_plus) + ret = ao_scheme_string_poly(ao_scheme_string_cat(ao_scheme_poly_string(ret), + ao_scheme_poly_string(car))); + else + return ao_scheme_error(AO_SCHEME_INVALID, "invalid args"); + } + return ret; +} + +ao_poly +ao_scheme_do_plus(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_plus); +} + +ao_poly +ao_scheme_do_minus(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_minus); +} + +ao_poly +ao_scheme_do_times(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_times); +} + +ao_poly +ao_scheme_do_divide(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_divide); +} + +ao_poly +ao_scheme_do_quotient(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_quotient); +} + +ao_poly +ao_scheme_do_modulo(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_modulo); +} + +ao_poly +ao_scheme_do_remainder(struct ao_scheme_cons *cons) +{ + return ao_scheme_math(cons, builtin_remainder); +} + +ao_poly +ao_scheme_compare(struct ao_scheme_cons *cons, enum ao_scheme_builtin_id op) +{ + ao_poly left; + + if (!cons) + return _ao_scheme_bool_true; + + left = cons->car; + for (cons = ao_scheme_cons_cdr(cons); cons; cons = ao_scheme_cons_cdr(cons)) { + ao_poly right = cons->car; + + if (op == builtin_equal) { + if (left != right) + return _ao_scheme_bool_false; + } else { + uint8_t lt = ao_scheme_poly_type(left); + uint8_t rt = ao_scheme_poly_type(right); + if (ao_scheme_integer_typep(lt) && ao_scheme_integer_typep(rt)) { + int32_t l = ao_scheme_poly_integer(left); + int32_t r = ao_scheme_poly_integer(right); + + switch (op) { + case builtin_less: + if (!(l < r)) + return _ao_scheme_bool_false; + break; + case builtin_greater: + if (!(l > r)) + return _ao_scheme_bool_false; + break; + case builtin_less_equal: + if (!(l <= r)) + return _ao_scheme_bool_false; + break; + case builtin_greater_equal: + if (!(l >= r)) + return _ao_scheme_bool_false; + break; + default: + break; + } + } else if (lt == AO_SCHEME_STRING && rt == AO_SCHEME_STRING) { + int c = strcmp(ao_scheme_poly_string(left), + ao_scheme_poly_string(right)); + switch (op) { + case builtin_less: + if (!(c < 0)) + return _ao_scheme_bool_false; + break; + case builtin_greater: + if (!(c > 0)) + return _ao_scheme_bool_false; + break; + case builtin_less_equal: + if (!(c <= 0)) + return _ao_scheme_bool_false; + break; + case builtin_greater_equal: + if (!(c >= 0)) + return _ao_scheme_bool_false; + break; + default: + break; + } + } + } + left = right; + } + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_do_equal(struct ao_scheme_cons *cons) +{ + return ao_scheme_compare(cons, builtin_equal); +} + +ao_poly +ao_scheme_do_less(struct ao_scheme_cons *cons) +{ + return ao_scheme_compare(cons, builtin_less); +} + +ao_poly +ao_scheme_do_greater(struct ao_scheme_cons *cons) +{ + return ao_scheme_compare(cons, builtin_greater); +} + +ao_poly +ao_scheme_do_less_equal(struct ao_scheme_cons *cons) +{ + return ao_scheme_compare(cons, builtin_less_equal); +} + +ao_poly +ao_scheme_do_greater_equal(struct ao_scheme_cons *cons) +{ + return ao_scheme_compare(cons, builtin_greater_equal); +} + +ao_poly +ao_scheme_do_list_to_string(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_list2d3estring, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_list2d3estring, cons, 0, AO_SCHEME_CONS, 1)) + return AO_SCHEME_NIL; + return ao_scheme_string_pack(ao_scheme_poly_cons(ao_scheme_arg(cons, 0))); +} + +ao_poly +ao_scheme_do_string_to_list(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_string2d3elist, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_string2d3elist, cons, 0, AO_SCHEME_STRING, 0)) + return AO_SCHEME_NIL; + return ao_scheme_string_unpack(ao_scheme_poly_string(ao_scheme_arg(cons, 0))); +} + +ao_poly +ao_scheme_do_flush_output(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_flush2doutput, cons, 0, 0)) + return AO_SCHEME_NIL; + ao_scheme_os_flush(); + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_do_led(struct ao_scheme_cons *cons) +{ + ao_poly led; + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_INT, 0)) + return AO_SCHEME_NIL; + led = ao_scheme_arg(cons, 0); + ao_scheme_os_led(ao_scheme_poly_int(led)); + return led; +} + +ao_poly +ao_scheme_do_delay(struct ao_scheme_cons *cons) +{ + ao_poly delay; + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_INT, 0)) + return AO_SCHEME_NIL; + delay = ao_scheme_arg(cons, 0); + ao_scheme_os_delay(ao_scheme_poly_int(delay)); + return delay; +} + +ao_poly +ao_scheme_do_eval(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_eval, cons, 1, 1)) + return AO_SCHEME_NIL; + ao_scheme_stack->state = eval_sexpr; + return cons->car; +} + +ao_poly +ao_scheme_do_apply(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_apply, cons, 2, INT_MAX)) + return AO_SCHEME_NIL; + ao_scheme_stack->state = eval_apply; + return ao_scheme_cons_poly(cons); +} + +ao_poly +ao_scheme_do_read(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_read, cons, 0, 0)) + return AO_SCHEME_NIL; + return ao_scheme_read(); +} + +ao_poly +ao_scheme_do_collect(struct ao_scheme_cons *cons) +{ + int free; + (void) cons; + free = ao_scheme_collect(AO_SCHEME_COLLECT_FULL); + return ao_scheme_int_poly(free); +} + +ao_poly +ao_scheme_do_nullp(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (ao_scheme_arg(cons, 0) == AO_SCHEME_NIL) + return _ao_scheme_bool_true; + else + return _ao_scheme_bool_false; +} + +ao_poly +ao_scheme_do_not(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (ao_scheme_arg(cons, 0) == _ao_scheme_bool_false) + return _ao_scheme_bool_true; + else + return _ao_scheme_bool_false; +} + +static ao_poly +ao_scheme_do_typep(int type, struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (ao_scheme_poly_type(ao_scheme_arg(cons, 0)) == type) + return _ao_scheme_bool_true; + return _ao_scheme_bool_false; +} + +ao_poly +ao_scheme_do_pairp(struct ao_scheme_cons *cons) +{ + ao_poly v; + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + v = ao_scheme_arg(cons, 0); + if (v != AO_SCHEME_NIL && ao_scheme_poly_type(v) == AO_SCHEME_CONS) + return _ao_scheme_bool_true; + return _ao_scheme_bool_false; +} + +ao_poly +ao_scheme_do_integerp(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + switch (ao_scheme_poly_type(ao_scheme_arg(cons, 0))) { + case AO_SCHEME_INT: + case AO_SCHEME_BIGINT: + return _ao_scheme_bool_true; + default: + return _ao_scheme_bool_false; + } +} + +ao_poly +ao_scheme_do_numberp(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + switch (ao_scheme_poly_type(ao_scheme_arg(cons, 0))) { + case AO_SCHEME_INT: + case AO_SCHEME_BIGINT: + case AO_SCHEME_FLOAT: + return _ao_scheme_bool_true; + default: + return _ao_scheme_bool_false; + } +} + +ao_poly +ao_scheme_do_stringp(struct ao_scheme_cons *cons) +{ + return ao_scheme_do_typep(AO_SCHEME_STRING, cons); +} + +ao_poly +ao_scheme_do_symbolp(struct ao_scheme_cons *cons) +{ + return ao_scheme_do_typep(AO_SCHEME_ATOM, cons); +} + +ao_poly +ao_scheme_do_booleanp(struct ao_scheme_cons *cons) +{ + return ao_scheme_do_typep(AO_SCHEME_BOOL, cons); +} + +ao_poly +ao_scheme_do_procedurep(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + switch (ao_scheme_poly_type(ao_scheme_arg(cons, 0))) { + case AO_SCHEME_BUILTIN: + case AO_SCHEME_LAMBDA: + return _ao_scheme_bool_true; + default: + return _ao_scheme_bool_false; + } +} + +/* This one is special -- a list is either nil or + * a 'proper' list with only cons cells + */ +ao_poly +ao_scheme_do_listp(struct ao_scheme_cons *cons) +{ + ao_poly v; + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + v = ao_scheme_arg(cons, 0); + for (;;) { + if (v == AO_SCHEME_NIL) + return _ao_scheme_bool_true; + if (ao_scheme_poly_type(v) != AO_SCHEME_CONS) + return _ao_scheme_bool_false; + v = ao_scheme_poly_cons(v)->cdr; + } +} + +ao_poly +ao_scheme_do_set_car(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 2, 2)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_CONS, 0)) + return AO_SCHEME_NIL; + return ao_scheme_poly_cons(ao_scheme_arg(cons, 0))->car = ao_scheme_arg(cons, 1); +} + +ao_poly +ao_scheme_do_set_cdr(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 2, 2)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_CONS, 0)) + return AO_SCHEME_NIL; + return ao_scheme_poly_cons(ao_scheme_arg(cons, 0))->cdr = ao_scheme_arg(cons, 1); +} + +ao_poly +ao_scheme_do_symbol_to_string(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_ATOM, 0)) + return AO_SCHEME_NIL; + return ao_scheme_string_poly(ao_scheme_string_copy(ao_scheme_poly_atom(ao_scheme_arg(cons, 0))->name)); +} + +ao_poly +ao_scheme_do_string_to_symbol(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_STRING, 0)) + return AO_SCHEME_NIL; + + return ao_scheme_atom_poly(ao_scheme_atom_intern(ao_scheme_poly_string(ao_scheme_arg(cons, 0)))); +} + +ao_poly +ao_scheme_do_read_char(struct ao_scheme_cons *cons) +{ + int c; + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0)) + return AO_SCHEME_NIL; + c = getchar(); + return ao_scheme_int_poly(c); +} + +ao_poly +ao_scheme_do_write_char(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1)) + return AO_SCHEME_NIL; + if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_INT, 0)) + return AO_SCHEME_NIL; + putchar(ao_scheme_poly_integer(ao_scheme_arg(cons, 0))); + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_do_exit(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0)) + return AO_SCHEME_NIL; + ao_scheme_exception |= AO_SCHEME_EXIT; + return _ao_scheme_bool_true; +} + +ao_poly +ao_scheme_do_current_jiffy(struct ao_scheme_cons *cons) +{ + int jiffy; + + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0)) + return AO_SCHEME_NIL; + jiffy = ao_scheme_os_jiffy(); + return (ao_scheme_int_poly(jiffy)); +} + +ao_poly +ao_scheme_do_current_second(struct ao_scheme_cons *cons) +{ + int second; + + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0)) + return AO_SCHEME_NIL; + second = ao_scheme_os_jiffy() / AO_SCHEME_JIFFIES_PER_SECOND; + return (ao_scheme_int_poly(second)); +} + +ao_poly +ao_scheme_do_jiffies_per_second(struct ao_scheme_cons *cons) +{ + if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0)) + return AO_SCHEME_NIL; + return (ao_scheme_int_poly(AO_SCHEME_JIFFIES_PER_SECOND)); +} + +#define AO_SCHEME_BUILTIN_FUNCS +#include "ao_scheme_builtin.h" |