projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | |
| 2 | /* Grammar interface */ | |
| 3 | ||
| 4 | #ifndef Py_GRAMMAR_H | |
| 5 | #define Py_GRAMMAR_H | |
| 6 | #ifdef __cplusplus | |
| 7 | extern "C" { | |
| 8 | #endif | |
| 9 | ||
| 10 | #include "bitset.h" /* Sigh... */ | |
| 11 | ||
| 12 | /* A label of an arc */ | |
| 13 | ||
| 14 | typedef struct { | |
| 15 | int lb_type; | |
| 16 | char *lb_str; | |
| 17 | } label; | |
| 18 | ||
| 19 | #define EMPTY 0 /* Label number 0 is by definition the empty label */ | |
| 20 | ||
| 21 | /* A list of labels */ | |
| 22 | ||
| 23 | typedef struct { | |
| 24 | int ll_nlabels; | |
| 25 | label *ll_label; | |
| 26 | } labellist; | |
| 27 | ||
| 28 | /* An arc from one state to another */ | |
| 29 | ||
| 30 | typedef struct { | |
| 31 | short a_lbl; /* Label of this arc */ | |
| 32 | short a_arrow; /* State where this arc goes to */ | |
| 33 | } arc; | |
| 34 | ||
| 35 | /* A state in a DFA */ | |
| 36 | ||
| 37 | typedef struct { | |
| 38 | int s_narcs; | |
| 39 | arc *s_arc; /* Array of arcs */ | |
| 40 | ||
| 41 | /* Optional accelerators */ | |
| 42 | int s_lower; /* Lowest label index */ | |
| 43 | int s_upper; /* Highest label index */ | |
| 44 | int *s_accel; /* Accelerator */ | |
| 45 | int s_accept; /* Nonzero for accepting state */ | |
| 46 | } state; | |
| 47 | ||
| 48 | /* A DFA */ | |
| 49 | ||
| 50 | typedef struct { | |
| 51 | int d_type; /* Non-terminal this represents */ | |
| 52 | char *d_name; /* For printing */ | |
| 53 | int d_initial; /* Initial state */ | |
| 54 | int d_nstates; | |
| 55 | state *d_state; /* Array of states */ | |
| 56 | bitset d_first; | |
| 57 | } dfa; | |
| 58 | ||
| 59 | /* A grammar */ | |
| 60 | ||
| 61 | typedef struct { | |
| 62 | int g_ndfas; | |
| 63 | dfa *g_dfa; /* Array of DFAs */ | |
| 64 | labellist g_ll; | |
| 65 | int g_start; /* Start symbol of the grammar */ | |
| 66 | int g_accel; /* Set if accelerators present */ | |
| 67 | } grammar; | |
| 68 | ||
| 69 | /* FUNCTIONS */ | |
| 70 | ||
| 71 | grammar *newgrammar(int start); | |
| 72 | dfa *adddfa(grammar *g, int type, char *name); | |
| 73 | int addstate(dfa *d); | |
| 74 | void addarc(dfa *d, int from, int to, int lbl); | |
| 75 | dfa *PyGrammar_FindDFA(grammar *g, int type); | |
| 76 | ||
| 77 | int addlabel(labellist *ll, int type, char *str); | |
| 78 | int findlabel(labellist *ll, int type, char *str); | |
| 79 | char *PyGrammar_LabelRepr(label *lb); | |
| 80 | void translatelabels(grammar *g); | |
| 81 | ||
| 82 | void addfirstsets(grammar *g); | |
| 83 | ||
| 84 | void PyGrammar_AddAccelerators(grammar *g); | |
| 85 | void PyGrammar_RemoveAccelerators(grammar *); | |
| 86 | ||
| 87 | void printgrammar(grammar *g, FILE *fp); | |
| 88 | void printnonterminals(grammar *g, FILE *fp); | |
| 89 | ||
| 90 | #ifdef __cplusplus | |
| 91 | } | |
| 92 | #endif | |
| 93 | #endif /* !Py_GRAMMAR_H */ |