118 lines
1.7 KiB
C
118 lines
1.7 KiB
C
#include "factor.h"
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void clear_environment(void)
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{
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int i;
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for(i = 0; i < USER_ENV; i++)
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userenv[i] = F;
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profile_depth = 0;
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executing = F;
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}
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INLINE void execute(F_WORD* word)
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{
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((XT)(word->xt))(word);
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}
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void run(void)
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{
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CELL next;
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/* Error handling. */
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#ifdef WIN32
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setjmp(toplevel);
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#else
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sigsetjmp(toplevel, 1);
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#endif
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if(thrown_error != F)
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{
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if(thrown_keep_stacks)
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{
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ds = thrown_ds;
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cs = thrown_cs;
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callframe = thrown_callframe;
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executing = thrown_executing;
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}
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else
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{
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fix_stacks();
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callframe = F;
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executing = F;
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}
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dpush(thrown_error);
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/* Notify any 'catch' blocks */
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call(userenv[BREAK_ENV]);
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thrown_error = F;
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}
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for(;;)
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{
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if(callframe == F)
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{
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callframe = cpop();
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executing = cpop();
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continue;
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}
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callframe = (CELL)untag_cons(callframe);
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next = get(callframe);
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callframe = get(callframe + CELLS);
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if(type_of(next) == WORD_TYPE)
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execute(untag_word_fast(next));
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else
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dpush(next);
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}
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}
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/* XT of deferred words */
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void undefined(F_WORD* word)
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{
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general_error(ERROR_UNDEFINED_WORD,tag_object(word));
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}
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/* XT of compound definitions */
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void docol(F_WORD* word)
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{
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call(word->def);
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executing = tag_object(word);
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}
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/* pushes word parameter */
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void dosym(F_WORD* word)
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{
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dpush(word->def);
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}
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void primitive_execute(void)
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{
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execute(untag_word(dpop()));
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}
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void primitive_call(void)
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{
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call(dpop());
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}
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void primitive_ifte(void)
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{
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CELL f = dpop();
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CELL t = dpop();
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CELL cond = dpop();
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call(cond == F ? f : t);
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}
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void primitive_getenv(void)
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{
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F_FIXNUM e = untag_fixnum_fast(dpeek());
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drepl(userenv[e]);
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}
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void primitive_setenv(void)
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{
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F_FIXNUM e = untag_fixnum_fast(dpop());
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CELL value = dpop();
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userenv[e] = value;
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}
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