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#include <pgf/pgf.h>
#include <pgf/linearizer.h>
#include <pgf/parser.h>
typedef struct {
int start, end;
PgfCId cat;
int lin_idx;
} PgfPhrase;
typedef struct {
PgfLinFuncs* funcs;
PgfParseState* ps;
int pos;
GuBuf* marks;
GuBuf* phrases;
int found, matches;
GuPool* pool;
} PgfMetricsLznState;
static void
pgf_metrics_lzn_symbol_tokens(PgfLinFuncs** funcs, PgfTokens toks)
{
PgfMetricsLznState* state = gu_container(funcs, PgfMetricsLznState, funcs);
size_t len = gu_seq_length(toks);
for (size_t i = 0; i < len; i++) {
PgfToken tok = gu_seq_get(toks, PgfToken, i);
if (state->ps != NULL)
state->ps = pgf_parser_next_state(state->ps, tok, state->pool);
state->pos++;
}
}
static void
pgf_metrics_lzn_expr_literal(PgfLinFuncs** funcs, PgfLiteral lit)
{
PgfMetricsLznState* state = gu_container(funcs, PgfMetricsLznState, funcs);
GuVariantInfo i = gu_variant_open(lit);
switch (i.tag) {
case PGF_LITERAL_STR: {
PgfLiteralStr* lstr = i.data;
if (state->ps != NULL) {
state->ps = pgf_parser_next_state(state->ps, lstr->val, state->pool);
}
state->pos++;
break;
}
case PGF_LITERAL_INT: {
PgfLiteralInt* lint = i.data;
if (state->ps != NULL) {
GuString tok =
gu_format_string(state->pool, "%d", lint->val);
state->ps = pgf_parser_next_state(state->ps, tok, state->pool);
}
state->pos++;
break;
}
case PGF_LITERAL_FLT: {
PgfLiteralFlt* lflt = i.data;
if (state->ps != NULL) {
GuString tok =
gu_format_string(state->pool, "%f", lflt->val);
state->ps = pgf_parser_next_state(state->ps, tok, state->pool);
}
state->pos++;
break;
}
default:
gu_impossible();
}
}
static void
pgf_metrics_lzn_begin_phrase(PgfLinFuncs** funcs, PgfCId cat, int fid, int lin_index, PgfCId fun)
{
PgfMetricsLznState* state = gu_container(funcs, PgfMetricsLznState, funcs);
gu_buf_push(state->marks, int, state->pos);
}
static void
pgf_metrics_lzn_end_phrase1(PgfLinFuncs** funcs, PgfCId cat, int fid, int lin_idx, PgfCId fun)
{
PgfMetricsLznState* state = gu_container(funcs, PgfMetricsLznState, funcs);
int start = gu_buf_pop(state->marks, int);
int end = state->pos;
if (start != end) {
PgfPhrase* phrase = gu_new(PgfPhrase, state->pool);
phrase->start = start;
phrase->end = end;
phrase->cat = cat;
phrase->lin_idx = lin_idx;
gu_buf_push(state->phrases, PgfPhrase*, phrase);
}
}
static void
pgf_metrics_lzn_end_phrase2(PgfLinFuncs** funcs, PgfCId cat, int fid, int lin_idx, PgfCId fun)
{
PgfMetricsLznState* state = gu_container(funcs, PgfMetricsLznState, funcs);
int start = gu_buf_pop(state->marks, int);
int end = state->pos;
if (start != end) {
size_t n_phrases = gu_buf_length(state->phrases);
for (size_t i = 0; i < n_phrases; i++) {
PgfPhrase* phrase = gu_buf_get(state->phrases, PgfPhrase*, i);
if (phrase->start == start &&
phrase->end == end &&
gu_string_eq(phrase->cat, cat) &&
phrase->lin_idx == lin_idx) {
state->matches++;
break;
}
}
state->found++;
}
}
static PgfLinFuncs pgf_metrics_lin_funcs1 = {
.symbol_tokens = pgf_metrics_lzn_symbol_tokens,
.expr_literal = pgf_metrics_lzn_expr_literal,
.begin_phrase = pgf_metrics_lzn_begin_phrase,
.end_phrase = pgf_metrics_lzn_end_phrase1
};
static PgfLinFuncs pgf_metrics_lin_funcs2 = {
.symbol_tokens = pgf_metrics_lzn_symbol_tokens,
.expr_literal = pgf_metrics_lzn_expr_literal,
.begin_phrase = pgf_metrics_lzn_begin_phrase,
.end_phrase = pgf_metrics_lzn_end_phrase2
};
bool
pgf_parseval(PgfConcr* concr, PgfExpr expr, PgfCId cat,
double *precision, double *recall, double *exact)
{
GuPool* pool = gu_new_pool();
GuEnum* en_lins1 =
pgf_lzr_concretize(concr, expr, pool);
PgfCncTree ctree1 = gu_next(en_lins1, PgfCncTree, pool);
if (gu_variant_is_null(ctree1)) {
gu_pool_free(pool);
return false;
}
PgfMetricsLznState state;
state.funcs = &pgf_metrics_lin_funcs1;
state.ps = pgf_parser_init_state(concr, cat, 0, pool);
state.marks = gu_new_buf(int, pool);
state.pos = 0;
state.phrases = gu_new_buf(PgfPhrase*, pool);
state.matches = 0;
state.found = 0;
state.pool = pool;
pgf_lzr_linearize(concr, ctree1, 0, &state.funcs);
if (state.ps == NULL) {
gu_pool_free(pool);
return false;
}
GuEnum* en_trees = pgf_parse_result(state.ps, pool);
PgfExprProb* ep = gu_next(en_trees, PgfExprProb*, pool);
if (ep == NULL) {
gu_pool_free(pool);
return false;
}
GuEnum* en_lins2 =
pgf_lzr_concretize(concr, ep->expr, pool);
PgfCncTree ctree2 = gu_next(en_lins2, PgfCncTree, pool);
if (gu_variant_is_null(ctree2)) {
gu_pool_free(pool);
return false;
}
state.funcs = &pgf_metrics_lin_funcs2;
state.ps = NULL;
state.pos = 0;
pgf_lzr_linearize(concr, ctree2, 0, &state.funcs);
*precision = ((double) state.matches)/((double) state.found);
*recall = ((double) state.matches)/((double) gu_buf_length(state.phrases));
*exact = pgf_expr_eq(expr, ep->expr) ? 1 : 0;
return true;
}
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