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add API for pretty-printing for grammar symbols and symbol sequences

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This commit is contained in:
Sven M. Hallberg 2013-05-23 23:35:10 +02:00
parent f6983a5041
commit 748845ca0c
3 changed files with 19 additions and 15 deletions
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9
src/backends/llk.c
View file

@ -164,9 +164,6 @@ static void stringmap_merge(HHashSet *workset, HCFStringMap *dst, HCFStringMap *
}
}
void pprint_sequence(FILE *f, const HCFGrammar *g, const HCFSequence *seq);
void pprint_symbol(FILE *f, const HCFGrammar *g, const HCFChoice *x);
/* Generate entries for the production "A" in the given table row. */
static int fill_table_row(size_t kmax, HCFGrammar *g, HCFStringMap *row,
const HCFChoice *A)
@ -206,8 +203,8 @@ static int fill_table_row(size_t kmax, HCFGrammar *g, HCFStringMap *row,
// XXX debug
if(A == g->start) {
printf("predict(");
pprint_sequence(stdout, g, rhs);
printf(" ) = ");
h_pprint_sequence(stdout, g, rhs);
printf(") = ");
h_pprint_stringset(stdout, g, pred, 0);
}
}
@ -215,7 +212,7 @@ static int fill_table_row(size_t kmax, HCFGrammar *g, HCFStringMap *row,
// XXX debug
if(A == g->start) {
printf("row(");
pprint_symbol(stdout, g, A);
h_pprint_symbol(stdout, g, A);
printf(") = ");
h_pprint_stringset(stdout, g, row, 0);
}

23
src/cfgrammar.c
View file

@ -624,7 +624,7 @@ static HCFChoice **pprint_string(FILE *f, HCFChoice **x)
return x;
}
void pprint_symbol(FILE *f, const HCFGrammar *g, const HCFChoice *x)
void h_pprint_symbol(FILE *f, const HCFGrammar *g, const HCFChoice *x)
{
switch(x->type) {
case HCF_CHAR:
@ -643,32 +643,37 @@ void pprint_symbol(FILE *f, const HCFGrammar *g, const HCFChoice *x)
}
}
void pprint_sequence(FILE *f, const HCFGrammar *g, const HCFSequence *seq)
void h_pprint_sequence(FILE *f, const HCFGrammar *g, const HCFSequence *seq)
{
HCFChoice **x = seq->items;
if(*x == NULL) { // the empty sequence
fputs(" \"\"", f);
fputs("\"\"", f);
} else {
while(*x) {
fputc(' ', f); // separator
if(x != seq->items) fputc(' ', f); // internal separator
if((*x)->type == HCF_CHAR) {
// condense character strings
x = pprint_string(f, x);
} else {
pprint_symbol(f, g, *x);
h_pprint_symbol(f, g, *x);
x++;
}
}
}
}
// adds some separators expected below
static void pprint_sequence(FILE *f, const HCFGrammar *g, const HCFSequence *seq)
{
fputc(' ', f);
h_pprint_sequence(f, g, seq);
fputc('\n', f);
}
static
void pprint_ntrules(FILE *f, const HCFGrammar *g, const HCFChoice *nt,
int indent, int len)
static void pprint_ntrules(FILE *f, const HCFGrammar *g, const HCFChoice *nt,
int indent, int len)
{
int i;
int column = indent + len;
@ -738,7 +743,7 @@ void h_pprint_symbolset(FILE *file, const HCFGrammar *g, const HHashSet *set, in
a = hte->key; // production's left-hand symbol
pprint_symbol(file, g, a);
h_pprint_symbol(file, g, a);
}
}

2
src/cfgrammar.h
View file

@ -83,5 +83,7 @@ const HCFStringMap *h_follow(size_t k, HCFGrammar *g, const HCFChoice *x);
/* Pretty-printers for grammars and associated data. */
void h_pprint_grammar(FILE *file, const HCFGrammar *g, int indent);
void h_pprint_sequence(FILE *f, const HCFGrammar *g, const HCFSequence *seq);
void h_pprint_symbol(FILE *f, const HCFGrammar *g, const HCFChoice *x);
void h_pprint_symbolset(FILE *file, const HCFGrammar *g, const HHashSet *set, int indent);
void h_pprint_stringset(FILE *file, const HCFGrammar *g, const HCFStringMap *set, int indent);