97 lines
1.4 KiB
C
97 lines
1.4 KiB
C
#include "dat.h"
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#include "fn.h"
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#include <setjmp.h>
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jmp_buf *errptr;
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GC *gc;
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static void
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SExprint(Object *obj)
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{
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if(obj == 0)
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return;
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switch(obj->type){
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default:
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return;
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case OCELL:
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printf("(");
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SExprint(obj->car);
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printf(" . ");
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SExprint(obj->cdr);
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printf(")");
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break;
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case OINT:
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printf("%ld", obj->num);
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break;
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case OIDENT:
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printf("%s", obj->beg);
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break;
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case OSTRING:
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printf("\"%s\"", obj->beg);
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break;
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case OBLTIN:
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case OSYMBOL:
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printf("%s", obj->beg);
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break;
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case OENV:
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printf("<env>");
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SExprint(obj->vars);
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break;
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case OMACRO:
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printf("<macro>");
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goto func;
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case OLAMBDA:
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printf("<lambda>");
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goto func;
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case OFUNC:
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printf("<func>");
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func:
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printf("<");
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SExprint(obj->params);
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SExprint(obj->body);
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printf(">");
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break;
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}
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}
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void
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printexpr(Object *obj)
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{
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SExprint(obj);
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printf("\n");
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}
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static void
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loop(Object *env, FILE *f)
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{
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jmp_buf buf;
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errptr = &buf;
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if(setjmp(buf) == 1){
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if(feof(f))
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return;
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skipline(f);
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}
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while(1){
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printf(">> ");
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Object *res = nextexpr(f);
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printexpr(res);
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res = eval(env, res);
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printgc("status", gc);
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printexpr(res);
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}
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}
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int
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main(int argc, char *argv[])
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{
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gc = newgc(&argc, 400);
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Object *env = newenv(gc, &Nil, &Nil, &Nil);
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for(int i = 1; i < argc; ++i){
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FILE *f = fopen(argv[i], "r");
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if(f == 0)
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panic("can't open %s", argv[i]);
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loop(env, f);
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}
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loop(env, stdin);
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}
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