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#include <HsFFI.h>
#include <pgf/pgf.h>
#include <gu/utf8.h>
typedef struct {
PgfLiteralCallback callback;
PgfExprProb* (*match)(GuString ann, size_t* poffset,
GuPool *out_pool);
GuFinalizer fin;
} HSPgfLiteralCallback;
static size_t
hspgf_offset2hs(GuString sentence, size_t offset)
{
const uint8_t *start = sentence;
const uint8_t *end = sentence + offset;
size_t hs_offset = 0;
while (start < end) {
gu_utf8_decode(&start);
hs_offset++;
}
return hs_offset;
}
static size_t
hspgf_hs2offset(GuString sentence, size_t hs_offset)
{
const uint8_t *start = sentence;
const uint8_t *end = start;
while (hs_offset > 0) {
gu_utf8_decode(&end);
hs_offset--;
}
return (end - start);
}
static PgfExprProb*
hspgf_match_callback(PgfLiteralCallback* self, PgfConcr* concr,
GuString ann,
GuString sentence, size_t* poffset,
GuPool *out_pool)
{
HSPgfLiteralCallback* callback = (HSPgfLiteralCallback*) self;
size_t hs_offset =
hspgf_offset2hs(sentence, *poffset);
PgfExprProb* ep =
callback->match(ann, &hs_offset, out_pool);
*poffset = hspgf_hs2offset(sentence, hs_offset);
return ep;
}
static void
hspgf_literal_callback_fin(GuFinalizer* self)
{
HSPgfLiteralCallback* callback = gu_container(self, HSPgfLiteralCallback, fin);
if (callback->callback.match != NULL)
hs_free_fun_ptr((HsFunPtr) callback->match);
if (callback->callback.predict != NULL)
hs_free_fun_ptr((HsFunPtr) callback->callback.predict);
}
void
hspgf_callbacks_map_add_literal(PgfConcr* concr, PgfCallbacksMap* callbacks,
PgfCId cat, HsFunPtr match, HsFunPtr predict,
GuPool* pool)
{
HSPgfLiteralCallback* callback = gu_new(HSPgfLiteralCallback, pool);
callback->callback.match = hspgf_match_callback;
callback->callback.predict = (void*) predict;
callback->match = (void*) match;
callback->fin.fn = hspgf_literal_callback_fin;
gu_pool_finally(pool, &callback->fin);
pgf_callbacks_map_add_literal(concr, callbacks, cat, &callback->callback);
}
typedef struct {
PgfOracleCallback oracle;
GuString sentence;
bool (*predict) (PgfCId cat,
GuString label,
size_t offset);
bool (*complete)(PgfCId cat,
GuString label,
size_t offset);
PgfExprProb* (*literal)(PgfCId cat,
GuString label,
size_t* poffset,
GuPool *out_pool);
GuFinalizer fin;
} HSPgfOracleCallback;
static bool
hspgf_predict_callback(PgfOracleCallback* self,
PgfCId cat,
GuString label,
size_t offset)
{
HSPgfOracleCallback* oracle = gu_container(self, HSPgfOracleCallback, oracle);
return oracle->predict(cat,label,hspgf_offset2hs(oracle->sentence, offset));
}
static bool
hspgf_complete_callback(PgfOracleCallback* self,
PgfCId cat,
GuString label,
size_t offset)
{
HSPgfOracleCallback* oracle = gu_container(self, HSPgfOracleCallback, oracle);
return oracle->complete(cat,label,hspgf_offset2hs(oracle->sentence, offset));
}
static PgfExprProb*
hspgf_literal_callback(PgfOracleCallback* self,
PgfCId cat,
GuString label,
size_t* poffset,
GuPool *out_pool)
{
HSPgfOracleCallback* oracle = gu_container(self, HSPgfOracleCallback, oracle);
size_t hs_offset = hspgf_offset2hs(oracle->sentence, *poffset);
PgfExprProb* ep =
oracle->literal(cat,label,&hs_offset,out_pool);
*poffset = hspgf_hs2offset(oracle->sentence, hs_offset);
return ep;
}
static void
hspgf_oracle_callback_fin(GuFinalizer* self)
{
HSPgfOracleCallback* oracle = gu_container(self, HSPgfOracleCallback, fin);
if (oracle->predict != NULL)
hs_free_fun_ptr((HsFunPtr) oracle->predict);
if (oracle->complete != NULL)
hs_free_fun_ptr((HsFunPtr) oracle->complete);
if (oracle->literal != NULL)
hs_free_fun_ptr((HsFunPtr) oracle->literal);
}
PgfOracleCallback*
hspgf_new_oracle_callback(GuString sentence,
HsFunPtr predict, HsFunPtr complete, HsFunPtr literal,
GuPool* pool)
{
HSPgfOracleCallback* oracle = gu_new(HSPgfOracleCallback, pool);
oracle->oracle.predict = predict ? hspgf_predict_callback : NULL;
oracle->oracle.complete = complete ? hspgf_complete_callback : NULL;
oracle->oracle.literal = literal ? hspgf_literal_callback : NULL;
oracle->sentence = sentence;
oracle->predict = (void*) predict;
oracle->complete = (void*) complete;
oracle->literal = (void*) literal;
oracle->fin.fn = hspgf_oracle_callback_fin;
gu_pool_finally(pool, &oracle->fin);
return &oracle->oracle;
}
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