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/* Grammar interface */ #ifndef Py_GRAMMAR_H #define Py_GRAMMAR_H #ifdef __cplusplus extern "C" { #endif #include "bitset.h" /* Sigh... */ /* A label of an arc */ typedef struct { int lb_type; char *lb_str; } label; #define EMPTY 0 /* Label number 0 is by definition the empty label */ /* A list of labels */ typedef struct { int ll_nlabels; label *ll_label; } labellist; /* An arc from one state to another */ typedef struct { short a_lbl; /* Label of this arc */ short a_arrow; /* State where this arc goes to */ } arc; /* A state in a DFA */ typedef struct { int s_narcs; arc *s_arc; /* Array of arcs */ /* Optional accelerators */ int s_lower; /* Lowest label index */ int s_upper; /* Highest label index */ int *s_accel; /* Accelerator */ int s_accept; /* Nonzero for accepting state */ } state; /* A DFA */ typedef struct { int d_type; /* Non-terminal this represents */ char *d_name; /* For printing */ int d_initial; /* Initial state */ int d_nstates; state *d_state; /* Array of states */ bitset d_first; } dfa; /* A grammar */ typedef struct { int g_ndfas; dfa *g_dfa; /* Array of DFAs */ labellist g_ll; int g_start; /* Start symbol of the grammar */ int g_accel; /* Set if accelerators present */ } grammar; /* FUNCTIONS */ grammar *newgrammar(int start); void freegrammar(grammar *g); dfa *adddfa(grammar *g, int type, const char *name); int addstate(dfa *d); void addarc(dfa *d, int from, int to, int lbl); dfa *PyGrammar_FindDFA(grammar *g, int type); int addlabel(labellist *ll, int type, const char *str); int findlabel(labellist *ll, int type, const char *str); const char *PyGrammar_LabelRepr(label *lb); void translatelabels(grammar *g); void addfirstsets(grammar *g); void PyGrammar_AddAccelerators(grammar *g); void PyGrammar_RemoveAccelerators(grammar *); void printgrammar(grammar *g, FILE *fp); void printnonterminals(grammar *g, FILE *fp); #ifdef __cplusplus } #endif #endif /* !Py_GRAMMAR_H */