Staging
v0.5.1
v0.5.1
Revision bc4b5072ffd8747cc7bf967b456c2fe5d88ad15b authored by cvs2svn on 09 April 2002, 01:16:08 UTC, committed by cvs2svn on 09 April 2002, 01:16:08 UTC
1 parent 9c55088
grammar1.c
/* Grammar subroutines needed by parser */
#include "pgenheaders.h"
#include "assert.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) {
sprintf(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 {
sprintf(buf, "%.32s(%.32s)",
_PyParser_TokenNames[lb->lb_type], lb->lb_str);
return buf;
}
}
}
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