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json_printer.c
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json_printer.c
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/* This file contains the function required to
print a Büchi automaton in json.
*/
#include "ltl2ba.h"
extern FILE* tl_out;
extern int accept;
extern BState *bstates;
extern int sym_id, sym_size, mod;
extern char** sym_table;
/* Current level of indentation */
static int c_indent = 0;
/* Print indentation corresponding to `c_indent` level */
void
print_indent() {
int i;
for (i = 0; i < c_indent; i++)
fprintf(tl_out, "\t");
}
/* Print a transition in json */
void
print_json_trans(BTrans *t) {
int i, j, first;
print_indent();
fprintf(tl_out, "{\n");
c_indent++;
/* Transition destination */
print_indent();
fprintf(tl_out, "\"dest\": %d,\n", t->to->label);
/* List of positive predicate on the transition */
print_indent();
fprintf(tl_out, "\"pos\": [");
first = 1;
for(i = 0; i < sym_size; i++) {
for(j = 0; j < mod; j++) {
if(t->pos[i] & (1 << j)) {
if (first)
first = 0;
else
fprintf(tl_out, ", ");
fprintf(tl_out, "\"%s\"", sym_table[mod * i + j]);
}
}
}
fprintf(tl_out, "],\n");
/* List of positive negative on the transition */
print_indent();
fprintf(tl_out, "\"neg\": [");
first = 1;
for(i = 0; i < sym_size; i++) {
for(j = 0; j < mod; j++) {
if(t->neg[i] & (1 << j)) {
if (first)
first = 0;
else
fprintf(tl_out, ", ");
fprintf(tl_out, "\"%s\"", sym_table[mod * i + j]);
}
}
}
fprintf(tl_out, "]\n");
c_indent--;
print_indent();
fprintf(tl_out, "}");
}
/* Print a state in json */
void
print_json_state(BState *s) {
BTrans *t;
int is_final = (s->final == accept || s->id == 0);
print_indent();
fprintf(tl_out, "{\n");
c_indent++;
/* State name */
print_indent();
fprintf(tl_out, "\"label\": %d,\n", s->label);
/* Is the sate final */
print_indent();
fprintf(tl_out, "\"final\": %s,\n", is_final ? "true" : "false");
/* List of state outgoing transitions */
print_indent();
fprintf(tl_out, "\"trans\": [\n");
c_indent++;
int first = 1;
for (t = s->trans->nxt; t != s->trans; t = t->nxt) {
if (first)
first = 0;
else
fprintf(tl_out, ",\n");
print_json_trans(t);
}
fprintf(tl_out, "\n");
c_indent--;
print_indent();
fprintf(tl_out, "]\n");
c_indent--;
print_indent();
fprintf(tl_out, "}");
}
/* Print a buchi automaton in json format */
void
print_json_buchi() {
BState *s;
int nb_states = 0;
int init_id;
int i;
int first;
/* Give an id to every state and count them */
for (s = bstates->prv; s != bstates; s = s->prv, nb_states++) {
if (s->id == -1)
init_id = nb_states;
s->label = nb_states;
}
print_indent();
fprintf(tl_out, "{\n");
c_indent++;
/* Print the number of states */
print_indent();
fprintf(tl_out, "\"nb_state\": %d,\n", nb_states);
/* Print the number of symbols */
print_indent();
fprintf(tl_out, "\"nb_sym\": %d,\n", sym_id);
/* Print the list of symbols */
print_indent();
fprintf(tl_out, "\"symbols\": [");
first = 1;
for (i = 0; i < sym_id; i++) {
if (first)
first = 0;
else
fprintf(tl_out, ", ");
fprintf(tl_out, "\"%s\"", sym_table[i]);
}
fprintf(tl_out, "],\n");
/* Print the id of the initial state */
print_indent();
fprintf(tl_out, "\"init_state\": %d,\n", init_id);
/* Print the list of states */
print_indent();
fprintf(tl_out, "\"states\": [\n");
c_indent++;
first = 1;
for (s = bstates->prv; s != bstates; s = s->prv) {
if (first)
first = 0;
else
fprintf(tl_out, ",\n");
print_json_state(s);
}
fprintf(tl_out, "\n");
c_indent--;
print_indent();
fprintf(tl_out, "]\n");
c_indent--;
print_indent();
fprintf(tl_out, "}\n");
}