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- /* xlglobals - xlisp global variables */
-
- #include "xlisp.h"
-
- /* symbols */
- NODE *true = NIL;
- NODE *s_quote = NIL, *s_function = NIL;
- NODE *s_bquote = NIL, *s_comma = NIL, *s_comat = NIL;
- NODE *s_evalhook = NIL, *s_applyhook = NIL;
- NODE *s_lambda = NIL, *s_macro = NIL;
- NODE *s_stdin = NIL, *s_stdout = NIL;
- NODE *s_tracenable = NIL, *s_tlimit = NIL, *s_breakenable = NIL;
- NODE *s_continue = NIL, *s_quit = NIL;
- NODE *s_car = NIL, *s_cdr = NIL;
- NODE *s_get = NIL, *s_svalue = NIL, *s_splist = NIL;
- NODE *s_eql = NIL, *k_test = NIL, *k_tnot = NIL;
- NODE *k_optional = NIL, *k_rest = NIL, *k_aux = NIL;
- NODE *a_subr = NIL, *a_fsubr = NIL;
- NODE *a_list = NIL, *a_sym = NIL, *a_int = NIL;
- NODE *a_str = NIL, *a_obj = NIL, *a_fptr = NIL;
- NODE *oblist = NIL, *keylist = NIL, *s_unbound = NIL;
-
- /* evaluation variables */
- NODE *xlstack = NIL;
- NODE *xlenv = NIL;
- NODE *xlnewenv = NIL;
-
- /* exception handling variables */
- CONTEXT *xlcontext = NULL; /* current exception handler */
- NODE *xlvalue = NIL; /* exception value */
-
- /* debugging variables */
- int xldebug = 0; /* debug level */
- int xltrace = -1; /* trace stack pointer */
- NODE **trace_stack = NULL; /* trace stack */
-
- /* gensym variables */
- char gsprefix[STRMAX+1] = { 'G',0 }; /* gensym prefix string */
- int gsnumber = 1; /* gensym number */
-
- /* i/o variables */
- int xlplevel = 0; /* prompt nesting level */
- int xlfsize = 0; /* flat size of current print call */
- int prompt = TRUE; /* input prompt flag */
-
- /* dynamic memory variables */
- long total = 0L; /* total memory in use */
- int anodes = 0; /* number of nodes to allocate */
- int nnodes = 0; /* number of nodes allocated */
- int nsegs = 0; /* number of segments allocated */
- int nfree = 0; /* number of nodes free */
- int gccalls = 0; /* number of gc calls */
- struct segment *segs = NULL; /* list of allocated segments */
- NODE *fnodes = NIL; /* list of free nodes */
-
- /* object programming variables */
- NODE *self = NIL, *class = NIL, *object = NIL;
- NODE *new = NIL, *isnew = NIL, *msgcls = NIL, *msgclass = NIL;
- int varcnt = 0;
-
- /* general purpose string buffer */
- char buf[STRMAX+1] = { 0 };
-