void decode_decimal(pTHX_ unsigned char *input, STRLEN len, struct cc_type *type, SV *output)
{
union {
unsigned char bytes[4];
int32_t scale;
} bytes_or_scale;
if (UNLIKELY(len < 5))
croak("decode_decimal: len < 5");
memcpy(bytes_or_scale.bytes, input, 4);
bswap4(bytes_or_scale.bytes);
bytes_or_scale.scale *= -1;
decode_varint(aTHX_ input+4, len-4, type, output);
if (bytes_or_scale.scale != 0) {
char *sign;
if (bytes_or_scale.scale > 0) {
sign = "+";
} else {
sign = "";
}
sv_catpvf(output, "e%s%d", sign, bytes_or_scale.scale);
}
}
void decode_protobuf(char *buf, char *buf_end, yield_t yield)
{
while(buf < buf_end)
{
uint64_t key = decode_varint(buf, &buf);
struct key_value_pair pair = {
.field_number = key >> 3,
.wire_type = key & 0x07
};
switch(pair.wire_type)
{
case WT_VARINT: /* varint */
pair.value.varint = decode_varint(buf, &buf);
break;
case WT_64BIT: /* 64 bit */
pair.value._64_bit = get_32_le(buf, &buf);
buf += 4;
pair.value._64_bit |= (uint64_t)get_32_le(buf, &buf) << 32;
buf += 4;
break;
case WT_STRING: /* string */
pair.value.string.len = decode_varint(buf, &buf);
pair.value.string.start = buf;
buf += pair.value.string.len;
break;
case WT_32BIT: /* 32 bit */
pair.value._32_bit = get_32_le(buf, &buf);
buf += 4;
break;
}
yield(&pair);
}
}
void yield_cb(struct key_value_pair *pair)
{
printf("Field number: %d, Wire type: %d\n", pair->field_number,
pair->wire_type);
}
/**
* Convert a <code>CassDecimal<code/> object into a numerical string value
*
* @param byte_array Byte array to convert
* @return String representation of numerical value
*/
static std::string to_string(CassDecimal decimal) {
std::string byte_array = std::string(reinterpret_cast<const char *>(decimal.varint), decimal.varint_size);
std::string integer_value = decode_varint(byte_array.c_str());
//Ensure the decimal has scale
if (decimal.scale > 0) {
unsigned int period_position = integer_value.size() - decimal.scale;
return integer_value.substr(0, period_position) + "." + integer_value.substr(period_position);
}
return integer_value;
}
// Decodes a 32-bit varint from the current buffer position.
// Returns a status code as described in decoder.int.h.
FORCEINLINE int32_t decode_v32(upb_pbdecoder *d, uint32_t *u32) {
uint64_t u64;
int32_t ret = decode_varint(d, &u64);
if (ret >= 0) return ret;
if (u64 > UINT32_MAX) {
seterr(d, "Unterminated 32-bit varint");
// TODO(haberman) guarantee that this function return is >= 0 somehow,
// so we know this path will always be treated as error by our caller.
// Right now the size_t -> int32_t can overflow and produce negative values.
*u32 = 0;
return upb_pbdecoder_suspend(d);
}
*u32 = u64;
return DECODE_OK;
}
/* 32bit compat */
void decode_time(pTHX_ unsigned char *input, STRLEN len, struct cc_type *type, SV *output)
{
int32_t nano, seconds, hours, minutes;
char *txt;
char workbuf[20];
STRLEN txt_len;
decode_varint(aTHX_ input, len, type, output);
/* output now contains a string represending the ns since midnight */
txt = SvPV(output, txt_len);
if (txt_len > 14) {
croak("decode_time: invalid value");
}
if (txt_len <= 9) {
memset(workbuf, 0, 20);
memcpy(workbuf, txt, txt_len);
seconds = 0;
nano = atoi(workbuf);
} else {
memset(workbuf, 0, 20);
memcpy(workbuf, txt+txt_len-9, 9);
nano = atoi(workbuf);
memset(workbuf, 0, 20);
memcpy(workbuf, txt, txt_len-9);
seconds = atoi(workbuf);
}
hours = seconds / 3600;
minutes = (seconds % 3600) / 60;
seconds = seconds % 60;
sv_setpvf(output, "%d:%.2d:%.2d.%d", hours, minutes, seconds, nano);
txt = SvPV(output, txt_len);
while (txt[txt_len-1] == '0')
txt_len--;
if (txt[txt_len-1] == '.')
txt_len--;
SvCUR_set(output, txt_len);
}
T pbf::get_svarint() {
pbf_assert((has_wire_type(pbf_wire_type::varint) || has_wire_type(pbf_wire_type::length_delimited)) && "not a varint");
return static_cast<T>(decode_zigzag64(decode_varint(&m_data, m_end)));
}
T pbf::get_varint() {
return static_cast<T>(decode_varint(&m_data, m_end));
}
int32_t upb_pbdecoder_skipunknown(upb_pbdecoder *d, int32_t fieldnum,
uint8_t wire_type) {
if (fieldnum >= 0)
goto have_tag;
while (true) {
uint32_t tag;
CHECK_RETURN(decode_v32(d, &tag));
wire_type = tag & 0x7;
fieldnum = tag >> 3;
have_tag:
if (fieldnum == 0) {
seterr(d, "Saw invalid field number (0)");
return upb_pbdecoder_suspend(d);
}
// TODO: deliver to unknown field callback.
switch (wire_type) {
case UPB_WIRE_TYPE_32BIT:
CHECK_RETURN(skip(d, 4));
break;
case UPB_WIRE_TYPE_64BIT:
CHECK_RETURN(skip(d, 8));
break;
case UPB_WIRE_TYPE_VARINT: {
uint64_t u64;
CHECK_RETURN(decode_varint(d, &u64));
break;
}
case UPB_WIRE_TYPE_DELIMITED: {
uint32_t len;
CHECK_RETURN(decode_v32(d, &len));
CHECK_RETURN(skip(d, len));
break;
}
case UPB_WIRE_TYPE_START_GROUP:
CHECK_SUSPEND(pushtagdelim(d, -fieldnum));
break;
case UPB_WIRE_TYPE_END_GROUP:
if (fieldnum == -d->top->groupnum) {
pop(d);
} else if (fieldnum == d->top->groupnum) {
return DECODE_ENDGROUP;
} else {
seterr(d, "Unmatched ENDGROUP tag.");
return upb_pbdecoder_suspend(d);
}
break;
default:
seterr(d, "Invalid wire type");
return upb_pbdecoder_suspend(d);
}
if (d->top->groupnum >= 0) {
return DECODE_OK;
}
if (d->ptr == d->delim_end) {
seterr(d, "Enclosing submessage ended in the middle of value or group");
// Unlike most errors we notice during parsing, right now we have consumed
// all of the user's input.
//
// There are three different options for how to handle this case:
//
// 1. decode() = short count, error = set
// 2. decode() = full count, error = set
// 3. decode() = full count, error NOT set, short count and error will
// be reported on next call to decode() (or end())
//
// (1) and (3) have the advantage that they preserve the invariant that an
// error occurs iff decode() returns a short count.
//
// (2) and (3) have the advantage of reflecting the fact that all of the
// bytes were in fact parsed (and possibly delivered to the unknown field
// handler, in the future when that is supported).
//
// (3) requires extra state in the decode (a place to store the "permanent
// error" that we should return for all subsequent attempts to decode).
// But we likely want this anyway.
//
// Right now we do (1), thanks to the fact that we checkpoint *after* this
// check. (3) may be a better choice long term; unclear at the moment.
return upb_pbdecoder_suspend(d);
}
checkpoint(d);
}
}
/**
* Convert a two's compliment byte array into a numerical string value
*
* @param byte_array Byte array to convert
* @return String representation of numerical value
*/
static std::string to_string(const char *byte_array) {
return decode_varint(byte_array);
}
void decode_cell(pTHX_ unsigned char *input, STRLEN len, STRLEN *pos, struct cc_type *type, SV *output)
{
unsigned char *bytes;
STRLEN bytes_len;
if (unpack_bytes(aTHX_ input, len, pos, &bytes, &bytes_len) != 0) {
sv_setsv(output, &PL_sv_undef);
return;
}
switch (type->type_id) {
case CC_TYPE_ASCII:
case CC_TYPE_CUSTOM:
case CC_TYPE_BLOB:
decode_blob(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_BOOLEAN:
decode_boolean(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_VARCHAR:
case CC_TYPE_TEXT:
decode_utf8(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_INET:
decode_inet(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_SET:
case CC_TYPE_LIST:
decode_list(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_UUID:
case CC_TYPE_TIMEUUID:
decode_uuid(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_FLOAT:
decode_float(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_DOUBLE:
decode_double(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_DECIMAL:
decode_decimal(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_VARINT:
case CC_TYPE_BIGINT:
case CC_TYPE_COUNTER:
case CC_TYPE_TIMESTAMP:
case CC_TYPE_SMALLINT:
case CC_TYPE_TINYINT:
case CC_TYPE_INT:
decode_varint(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_DATE:
decode_date(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_TIME:
decode_time(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_MAP:
decode_map(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_UDT:
decode_udt(aTHX_ bytes, bytes_len, type, output);
break;
case CC_TYPE_TUPLE:
decode_tuple(aTHX_ bytes, bytes_len, type, output);
break;
default:
sv_setsv(output, &PL_sv_undef);
warn("Decoder doesn't yet understand type %d, returning undef instead", type->type_id);
break;
}
}
