Parser/printgrammar.c

   1
   2 /* Print a bunch of C initializers that represent a grammar */
   3
   4 #include "pgenheaders.h"
   5 #include "grammar.h"
   6
   7 /* Forward */
   8 static void printarcs(int, dfa *, FILE *);
   9 static void printstates(grammar *, FILE *);
  10 static void printdfas(grammar *, FILE *);
  11 static void printlabels(grammar *, FILE *);
  12
  13 void
  14 printgrammar(grammar *g, FILE *fp)
  15 {
  16         fprintf(fp, "/* Generated by Parser/pgen */\n\n");
  17         fprintf(fp, "#include \"pgenheaders.h\"\n");
  18         fprintf(fp, "#include \"grammar.h\"\n");
  19         printdfas(g, fp);
  20         printlabels(g, fp);
  21         fprintf(fp, "grammar _PyParser_Grammar = {\n");
  22         fprintf(fp, "\t%d,\n", g->g_ndfas);
  23         fprintf(fp, "\tdfas,\n");
  24         fprintf(fp, "\t{%d, labels},\n", g->g_ll.ll_nlabels);
  25         fprintf(fp, "\t%d\n", g->g_start);
  26         fprintf(fp, "};\n");
  27 }
  28
  29 void
  30 printnonterminals(grammar *g, FILE *fp)
  31 {
  32         dfa *d;
  33         int i;
  34
  35         fprintf(fp, "/* Generated by Parser/pgen */\n\n");
  36
  37         d = g->g_dfa;
  38         for (i = g->g_ndfas; --i >= 0; d++)
  39                 fprintf(fp, "#define %s %d\n", d->d_name, d->d_type);
  40 }
  41
  42 static void
  43 printarcs(int i, dfa *d, FILE *fp)
  44 {
  45         arc *a;
  46         state *s;
  47         int j, k;
  48
  49         s = d->d_state;
  50         for (j = 0; j < d->d_nstates; j++, s++) {
  51                 fprintf(fp, "static arc arcs_%d_%d[%d] = {\n",
  52                         i, j, s->s_narcs);
  53                 a = s->s_arc;
  54                 for (k = 0; k < s->s_narcs; k++, a++)
  55                         fprintf(fp, "\t{%d, %d},\n", a->a_lbl, a->a_arrow);
  56                 fprintf(fp, "};\n");
  57         }
  58 }
  59
  60 static void
  61 printstates(grammar *g, FILE *fp)
  62 {
  63         state *s;
  64         dfa *d;
  65         int i, j;
  66
  67         d = g->g_dfa;
  68         for (i = 0; i < g->g_ndfas; i++, d++) {
  69                 printarcs(i, d, fp);
  70                 fprintf(fp, "static state states_%d[%d] = {\n",
  71                         i, d->d_nstates);
  72                 s = d->d_state;
  73                 for (j = 0; j < d->d_nstates; j++, s++)
  74                         fprintf(fp, "\t{%d, arcs_%d_%d},\n",
  75                                 s->s_narcs, i, j);
  76                 fprintf(fp, "};\n");
  77         }
  78 }
  79
  80 static void
  81 printdfas(grammar *g, FILE *fp)
  82 {
  83         dfa *d;
  84         int i, j;
  85
  86         printstates(g, fp);
  87         fprintf(fp, "static dfa dfas[%d] = {\n", g->g_ndfas);
  88         d = g->g_dfa;
  89         for (i = 0; i < g->g_ndfas; i++, d++) {
  90                 fprintf(fp, "\t{%d, \"%s\", %d, %d, states_%d,\n",
  91                         d->d_type, d->d_name, d->d_initial, d->d_nstates, i);
  92                 fprintf(fp, "\t \"");
  93                 for (j = 0; j < NBYTES(g->g_ll.ll_nlabels); j++)
  94                         fprintf(fp, "\\%03o", d->d_first[j] & 0xff);
  95                 fprintf(fp, "\"},\n");
  96         }
  97         fprintf(fp, "};\n");
  98 }
  99
 100 static void
 101 printlabels(grammar *g, FILE *fp)
 102 {
 103         label *l;
 104         int i;
 105
 106         fprintf(fp, "static label labels[%d] = {\n", g->g_ll.ll_nlabels);
 107         l = g->g_ll.ll_label;
 108         for (i = g->g_ll.ll_nlabels; --i >= 0; l++) {
 109                 if (l->lb_str == NULL)
 110                         fprintf(fp, "\t{%d, 0},\n", l->lb_type);
 111                 else
 112                         fprintf(fp, "\t{%d, \"%s\"},\n",
 113                                 l->lb_type, l->lb_str);
 114         }
 115         fprintf(fp, "};\n");
 116 }