mirror of
https://github.com/python/cpython
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47 lines
1 KiB
C
47 lines
1 KiB
C
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/* Grammar subroutines needed by parser */
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#include "Python.h"
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#include "grammar.h"
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#include "token.h"
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/* Return the DFA for the given type */
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const dfa *
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PyGrammar_FindDFA(grammar *g, int type)
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{
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/* Massive speed-up */
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const dfa *d = &g->g_dfa[type - NT_OFFSET];
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assert(d->d_type == type);
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return d;
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}
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const char *
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PyGrammar_LabelRepr(label *lb)
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{
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static char buf[100];
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if (lb->lb_type == ENDMARKER)
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return "EMPTY";
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else if (ISNONTERMINAL(lb->lb_type)) {
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if (lb->lb_str == NULL) {
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PyOS_snprintf(buf, sizeof(buf), "NT%d", lb->lb_type);
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return buf;
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}
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else
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return lb->lb_str;
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}
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else if (lb->lb_type < N_TOKENS) {
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if (lb->lb_str == NULL)
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return _PyParser_TokenNames[lb->lb_type];
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else {
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PyOS_snprintf(buf, sizeof(buf), "%.32s(%.32s)",
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_PyParser_TokenNames[lb->lb_type], lb->lb_str);
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return buf;
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}
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}
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else {
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Py_FatalError("invalid grammar label");
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return NULL;
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}
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}
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