ref: f99b9cae6a3dc5775a83b264d6041be8d5d416d6
dir: /sys/src/cmd/python/Parser/grammar1.c/
/* Grammar subroutines needed by parser */ #include "Python.h" #include "pgenheaders.h" #include "grammar.h" #include "token.h" /* Return the DFA for the given type */ dfa * PyGrammar_FindDFA(grammar *g, register int type) { register dfa *d; #if 1 /* Massive speed-up */ d = &g->g_dfa[type - NT_OFFSET]; assert(d->d_type == type); return d; #else /* Old, slow version */ register int i; for (i = g->g_ndfas, d = g->g_dfa; --i >= 0; d++) { if (d->d_type == type) return d; } assert(0); /* NOTREACHED */ #endif } char * PyGrammar_LabelRepr(label *lb) { static char buf[100]; if (lb->lb_type == ENDMARKER) return "EMPTY"; else if (ISNONTERMINAL(lb->lb_type)) { if (lb->lb_str == NULL) { PyOS_snprintf(buf, sizeof(buf), "NT%d", lb->lb_type); return buf; } else return lb->lb_str; } else { if (lb->lb_str == NULL) return _PyParser_TokenNames[lb->lb_type]; else { PyOS_snprintf(buf, sizeof(buf), "%.32s(%.32s)", _PyParser_TokenNames[lb->lb_type], lb->lb_str); return buf; } } }