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kparse.c
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kparse.c
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/*
* functions for mapping k structs to perl variables
*/
#include "k.h"
#include "kparse.h"
#include <string.h>
#define MATH_INT64_NATIVE_IF_AVAILABLE
#include "perl_math_int64.h"
SV* sv_from_k(K k) {
SV* result;
if (k == NULL) {
result = &PL_sv_undef;
}
else if (k->t < 0) {
result = scalar_from_k(k);
}
else if (k->t > 0) {
result = vector_from_k(k);
}
else {
result = mixed_list_from_k(k);
}
return result;
}
SV* scalar_from_k(K k) {
SV *result = NULL;
switch (- k->t) {
case KB: // boolean
result = bool_from_k(k);
break;
case KG: // byte
result = byte_from_k(k);
break;
case KC: // char
result = char_from_k(k);
break;
case KH: // short
result = short_from_k(k);
break;
case KI: // int
case KM: // month
case KD: // date
case KU: // minute
case KV: // second
case KT: // time
result = int_from_k(k);
break;
case KJ: // long
case KN: // timespan
result = long_from_k(k);
break;
case KP: // timestamp
result = timestamp_from_k(k);
break;
case KE: // real
result = real_from_k(k);
break;
case KF: // float
case KZ: // time *don't use*
result = float_from_k(k);
break;
case KS: // symbol
result = symbol_from_k(k);
break;
case 128: // error
croak(k->s);
break;
default:
croak("unrecognized scalar type '%d'\n", k->t);
break;
}
return result;
}
SV* vector_from_k(K k) {
SV *result = NULL;
switch (k->t) {
case KB: // boolean
result = bool_vector_from_k(k);
break;
case KG: // byte
result = byte_vector_from_k(k);
break;
case KC: // char
result = char_vector_from_k(k);
break;
case KH: // short
result = short_vector_from_k(k);
break;
case KI: // int
case KM: // month
case KD: // date
case KU: // minute
case KV: // second
case KT: // time
result = int_vector_from_k(k);
break;
case KJ: // long
case KN: // timespan
result = long_vector_from_k(k);
break;
case KP: // timestamp
result = timestamp_vector_from_k(k);
break;
case KE: // real
result = real_vector_from_k(k);
break;
case KF: // float
case KZ: // time *don't use*
result = float_vector_from_k(k);
break;
case KS: // symbol
result = symbol_vector_from_k(k);
break;
case XT: // table or flip
result = table_from_k(k);
break;
case XD: // dict or table w/ primary keys
result = xd_from_k(k);
break;
// enumerations (start at 20?) other stuff?
case 100: // function
return &PL_sv_undef;
break;
case 101: // generic null
return &PL_sv_undef;
break;
case 102: // not sure actually. the q cmd '{:}[]' returns a 102h
return &PL_sv_undef;
break;
default:
croak("unrecognized vector type '%d'\n", k->t);
break;
}
return result;
}
/*
* K structs of type XD are either a partitioned table or a dictionary.
* Dispath accordingly.
*/
SV* xd_from_k(K k) {
if (kK(k)[0]->t == XT && kK(k)[1]->t == XT) {
return ptable_from_k(k);
}
else {
return dict_from_k(k);
}
}
/* copy the contents of hv into store_hv */
void hv_store_hv(HV *store_hv, HV *hv) {
int i;
int h_size = hv_iterinit(hv);
HE *store_ret, *he;
SV *key, *val;
for (i = 0; i < h_size; i++) {
he = hv_iternext(hv);
key = hv_iterkeysv(he);
val = hv_iterval(hv, he);
store_ret = hv_store_ent(store_hv, key, val, 0);
if (store_ret == NULL) {
croak("Failed to store hash entry");
}
SvREFCNT_inc(val);
}
}
SV* ptable_from_k(K k) {
HV *hv = newHV();
K t0 = kK(k)[0]; // partitioned tables have 2 sub-tables
K t1 = kK(k)[1];
SV *t0_rv = table_from_k(t0);
SV *t1_rv = table_from_k(t1);
HV *t0_hv = (HV*) SvRV( t0_rv );
HV *t1_hv = (HV*) SvRV( t1_rv );
hv_store_hv(hv, t0_hv);
hv_store_hv(hv, t1_hv);
SvREFCNT_dec(t0_rv);
SvREFCNT_dec(t1_rv);
return newRV_noinc( (SV*)hv );
}
SV* dict_from_k(K k) {
int i;
SV **key;
SV **val;
HV *hv = newHV();
HE *store_ret;
SV* keys_ref = sv_from_k( kK(k)[0] );
SV* vals_ref = sv_from_k( kK(k)[1] );
AV* keys = (AV*) SvRV( keys_ref );
AV* vals = (AV*) SvRV( vals_ref );
int key_count = av_len(keys) + 1;
/* k dicts can have the same key multiple times. When such dicts are
* referenced using a key, the value for the first occurance of the key
* is the one returned. Perl has the opposite. Here we go through the
* keys backward to ensure the value for any duplicate keys ends up being
* the value associated with the first occurance of the key as it would
* in k/q.
*/
for (i = key_count -1; i >= 0; i--) {
key = av_fetch(keys, i, 0);
val = av_fetch(vals, i, 0);
if (val == NULL) {
store_ret = hv_store_ent(hv, *key, &PL_sv_undef, 0);
}
else {
store_ret = hv_store_ent(hv, *key, *val, 0);
SvREFCNT_inc(*val);
}
if (store_ret == NULL) {
croak("Failed to convert k hash entry to perl hash entry");
}
}
SvREFCNT_dec(keys_ref);
SvREFCNT_dec(vals_ref);
return newRV_noinc( (SV*)hv );
}
SV* table_from_k(K k) {
K dict = k->k;
return dict_from_k(dict);
}
SV* mixed_list_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
av_push(av, sv_from_k( kK(k)[i] ) );
}
return newRV_noinc((SV* )av);
}
/*
* scalar helpers
*/
SV* bool_from_k(K k) {
if (k->g == 0) {
return &PL_sv_undef;
}
return newSViv( k->g );
}
SV* byte_from_k(K k) {
return newSVuv( k->g );
}
SV* char_from_k(K k) {
char byte_str[1];
byte_str[0] = k->g;
return newSVpvn(byte_str, 1);
}
SV* short_from_k(K k) {
if (k->h == nh) {
return &PL_sv_undef;
}
if (k->h == wh) {
return newSVpvn("inf", 3);
}
if (k->h == -wh) {
return newSVpvn("-inf", 4);
}
return newSViv(k->h);
}
SV* int_from_k(K k) {
if (k->i == ni) {
return &PL_sv_undef;
}
if (k->i == wi) {
return newSVpvn("inf", 3);
}
if (k->i == -wi) {
return newSVpvn("-inf", 4);
}
return newSViv(k->i);
}
SV* timestamp_from_k(K k) {
if (k->j == nj) {
return &PL_sv_undef;
}
if (k->j == wj) {
return newSVpvn("inf", 3);
}
if (k->j == -wj) {
return newSVpvn("-inf", 4);
}
return newSVi64(k->j);
}
SV* long_from_k(K k) {
if (k->j == nj) {
return &PL_sv_undef;
}
if (k->j == wj) {
return newSVpvn("inf", 3);
}
if (k->j == -wj) {
return newSVpvn("-inf", 4);
}
return newSVi64(k->j);
}
SV* real_from_k(K k) {
if (isnan(k->e)) {
return &PL_sv_undef;
}
return newSVnv(k->e);
}
SV* float_from_k(K k) {
if (isnan(k->f)) {
return &PL_sv_undef;
}
return newSVnv(k->f);
}
SV* symbol_from_k(K k) {
if (strncmp(k->s, "", k->n) == 0) {
return &PL_sv_undef;
}
return newSVpv(k->s, 0);
}
/*
* vector helpers
*/
SV* bool_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (kG(k)[i] == 0) {
av_push(av, &PL_sv_undef);
continue;
}
av_push(av, newSViv( kG(k)[i]) );
}
return newRV_noinc( (SV*)av );
}
SV* byte_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
av_push(av, newSVuv( kG(k)[i] ));
}
return newRV_noinc( (SV*)av );
}
SV* char_vector_from_k(K k) {
AV *av = newAV();
char byte_str[1];
int i = 0;
for (i = 0; i < k->n; i++) {
if (kG(k)[i] == 0) {
av_push(av, &PL_sv_undef);
continue;
}
byte_str[0] = kG(k)[i];
av_push(av, newSVpvn(byte_str, 1));
}
return newRV_noinc( (SV*)av );
}
SV* short_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (kH(k)[i] == nh) {
av_push(av, &PL_sv_undef);
continue;
}
if (kH(k)[i] == wh) {
av_push(av, newSVpvn("inf", 3));
continue;
}
if (kH(k)[i] == -wh) {
av_push(av, newSVpvn("-inf", 4));
continue;
}
av_push(av, newSViv( kH(k)[i]) );
}
return newRV_noinc( (SV*)av );
}
SV* int_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (kI(k)[i] == ni) {
av_push(av, &PL_sv_undef);
continue;
}
if (kI(k)[i] == wi) {
av_push(av, newSVpvn("inf", 3));
continue;
}
if (kI(k)[i] == -wi) {
av_push(av, newSVpvn("-inf", 4));
continue;
}
av_push(av, newSViv( kI(k)[i]) );
}
return newRV_noinc( (SV*)av );
}
SV* long_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (kJ(k)[i] == nj) {
av_push(av, &PL_sv_undef);
continue;
}
if (kJ(k)[i] == wj) {
av_push(av, newSVpvn("inf", 3));
continue;
}
if (kJ(k)[i] == -wj) {
av_push(av, newSVpvn("-inf", 4));
continue;
}
av_push(av, newSVi64(kJ(k)[i]) );
}
return newRV_noinc( (SV*)av );
}
SV* timestamp_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (kJ(k)[i] == nj) {
av_push(av, &PL_sv_undef);
continue;
}
if (kJ(k)[i] == wj) {
av_push(av, newSVpvn("inf", 3));
continue;
}
if (kJ(k)[i] == -wj) {
av_push(av, newSVpvn("-inf", 4));
continue;
}
av_push(av, newSVi64(kJ(k)[i]) );
}
return newRV_noinc( (SV*)av );
}
SV* real_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (isnan( kE(k)[i] )) {
av_push(av, &PL_sv_undef);
continue;
}
av_push(av, newSVnv( kE(k)[i] ) );
}
return newRV_noinc( (SV*)av );
}
SV* float_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
for (i = 0; i < k->n; i++) {
if (isnan( kF(k)[i] )) {
av_push(av, &PL_sv_undef);
continue;
}
av_push(av, newSVnv( kF(k)[i] ) );
}
return newRV_noinc( (SV*)av );
}
SV* symbol_vector_from_k(K k) {
AV *av = newAV();
int i = 0;
char *sym = NULL;
for (i = 0; i < k->n; i++) {
sym = kS(k)[i];
if (strncmp(sym, "", strlen(sym)) == 0) {
av_push(av, &PL_sv_undef);
continue;
}
av_push(av, newSVpv( kS(k)[i], 0 ) );
}
return newRV_noinc( (SV*)av );
}