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125 lines
2.3 KiB
C
125 lines
2.3 KiB
C
#include "builtins.h"
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#include <stdlib.h>
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#define IF_SIG (uint32_t)-1
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#define WHILE_SIG (uint32_t)-2
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#define ELSE_SIG (uint32_t)-3
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#define FUNC_SIG (uint32_t)-4
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int bn_set(instance *it);
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int bn_if(instance *it);
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int bn_else(instance *it);
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int bn_end(instance *it);
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int bn_while(instance *it);
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int bn_func(instance *it);
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int bn_solve(instance *it);
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void iload_builtins(instance *it)
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{
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inew_cfunc(it, "set", bn_set);
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inew_cfunc(it, "if", bn_if);
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inew_cfunc(it, "else", bn_else);
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inew_cfunc(it, "while", bn_while);
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inew_cfunc(it, "func", bn_func);
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inew_cfunc(it, "solve", bn_solve);
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}
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int bn_set(instance *it)
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{
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variable *var = igetarg(it, 0);
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variable *value = igetarg(it, 1);
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var->type = value->type;
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var->value.p = value->value.p;
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ipush(it, (uint32_t)var);
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return 0;
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}
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int bn_if(instance *it)
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{
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variable *cond = (variable *)ipop(it);
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uint32_t result = cond->value.p;
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ipush(it, result);
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ipush(it, IF_SIG);
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if (result == 0)
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it->sindent = SKIP | it->indent;
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ipush(it, 0);
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ipush(it, 0); // need to return because stack modify
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return 0;
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}
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static uint32_t if_cond = 0;
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int bn_else(instance *it)
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{
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uint32_t cond = if_cond;
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if (cond != 0)
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it->sindent = SKIP | it->indent;
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ipush(it, ELSE_SIG);
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ipush(it, 0); // for ret
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return 0;
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}
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int bn_end(instance *it)
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{
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uint32_t sig = ipop(it);
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if (sig == IF_SIG) {
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if_cond = ipop(it);
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} else if (sig == WHILE_SIG) {
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uint32_t lnidx = ipop(it);
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if (lnidx != (uint32_t)-1)
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it->lnidx = lnidx - 1;
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} else if (sig == CALL_SIG) {
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it->lnidx = ipop(it);
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it->indent++;
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}
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return 0;
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}
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int bn_while(instance *it)
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{
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variable *cond = (variable *)ipop(it);
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uint32_t result = cond->value.p;
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if (result == 0) {
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it->sindent = SKIP | it->indent;
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ipush(it, (uint32_t)-1);
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} else {
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ipush(it, it->lnidx);
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}
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ipush(it, WHILE_SIG);
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ipush(it, 0);
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ipush(it, 0); // need to ret
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return 0;
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}
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int bn_func(instance *it)
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{
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variable *f = igetarg(it, 0);
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if (f == 0)
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return -1;
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f->type = FUNC;
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f->value.p = it->lnidx;
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it->sindent = SKIP | it->indent;
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ipush(it, FUNC_SIG);
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ipush(it, 0); // for ret
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return 0;
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}
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int bn_solve(instance *it)
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{
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variable *s = igetarg(it, 0);
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variable **ops = iparse(it, (const char *)s->value.p);
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if (ops == 0)
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return -1;
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variable *a = isolve(it, ops, 0);
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free(ops);
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ipush(it, (uint32_t)a);
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return 0;
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}
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