mirror of
https://github.com/jart/cosmopolitan.git
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fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
77 lines
2 KiB
C
77 lines
2 KiB
C
#ifndef Py_GRAMMAR_H
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#define Py_GRAMMAR_H
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#include "libc/stdio/stdio.h"
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#include "third_party/python/Include/bitset.h"
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COSMOPOLITAN_C_START_
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/* A label of an arc */
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typedef struct {
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int lb_type;
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char *lb_str;
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} label;
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#define EMPTY 0 /* Label number 0 is by definition the empty label */
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/* A list of labels */
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typedef struct {
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int ll_nlabels;
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label *ll_label;
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} labellist;
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/* An arc from one state to another */
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typedef struct {
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short a_lbl; /* Label of this arc */
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short a_arrow; /* State where this arc goes to */
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} arc;
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/* A state in a DFA */
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typedef struct {
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int s_narcs; /* [jart/abi] moving s_accept here saves 4k */
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int s_accept; /* [optional] Nonzero for accepting state */
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arc *s_arc; /* Array of arcs */
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int s_lower; /* [optional] Lowest label index */
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int s_upper; /* [optional] Highest label index */
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int *s_accel; /* [optional] Accelerator */
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} state;
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/* A DFA */
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typedef struct {
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int d_type; /* Non-terminal this represents */
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char *d_name; /* For printing */
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int d_initial; /* Initial state */
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int d_nstates;
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state *d_state; /* Array of states */
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bitset d_first;
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} dfa;
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/* A grammar */
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typedef struct {
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int g_ndfas;
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dfa *g_dfa; /* Array of DFAs */
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labellist g_ll;
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int g_start; /* Start symbol of the grammar */
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int g_accel; /* Set if accelerators present */
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} grammar;
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grammar *newgrammar(int);
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void freegrammar(grammar *);
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dfa *adddfa(grammar *, int, const char *);
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int addstate(dfa *);
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void addarc(dfa *, int, int, int);
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dfa *PyGrammar_FindDFA(grammar *, int);
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int addlabel(labellist *, int, const char *);
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int findlabel(labellist *, int, const char *);
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const char *PyGrammar_LabelRepr(label *);
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void translatelabels(grammar *);
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void addfirstsets(grammar *);
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void PyGrammar_AddAccelerators(grammar *);
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void PyGrammar_RemoveAccelerators(grammar *);
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void printgrammar(grammar *, FILE *);
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void printnonterminals(grammar *, FILE *);
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#ifndef Py_LIMITED_API
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extern grammar _PyParser_Grammar;
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#endif
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COSMOPOLITAN_C_END_
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#endif /* !Py_GRAMMAR_H */
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