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#include "stdafx.h"
#include "Value.h"
#include "Core/Convert.h"
namespace sql {
Value::Value(MYSQL_BIND *data)
: data(data), nullValue(false), error(false), dataLength(0) {
// Clear the data, as per the manual. There are many fields that are not "public", so
// this is the "sanctioned" way of doing this...
memset(data, 0, sizeof(MYSQL_BIND));
// Set 'length' to 'buffer_length'. This is allowed in the documentation, and allows us
// to change 'length' without re-submitting the binds to MySQL.
data->length = &dataLength;
// Set is_null so that we can change null values. Documentation says that
// MYSQL_TYPE_NULL is an alternative.
data->is_null = &nullValue;
// Unsigned error.
data->error = &error;
// Set our representation to null.
clear();
}
Value::~Value() {
clear();
// Clear the value so that we don't have any lingering pointers to ourselves.
memset(data, 0, sizeof(MYSQL_BIND));
}
void Value::setInt(Long value) {
clear();
data->buffer_type = MYSQL_TYPE_LONGLONG;
data->buffer = &localBuffer;
data->buffer_length = sizeof(Long);
data->is_unsigned = false;
nullValue = false;
localBuffer.signedVal = value;
}
void Value::setUInt(Word value) {
clear();
data->buffer_type = MYSQL_TYPE_LONGLONG;
data->buffer = &localBuffer;
data->buffer_length = sizeof(Word);
data->is_unsigned = true;
nullValue = false;
localBuffer.unsignedVal = value;
}
void Value::setFloat(Double value) {
clear();
data->buffer_type = MYSQL_TYPE_DOUBLE;
data->buffer_length = sizeof(Double);
data->buffer = &localBuffer;
data->is_unsigned = false;
nullValue = false;
localBuffer.floatVal = value;
}
void Value::setString(Str *value) {
clear();
size_t length = convert(value->c_str(), null, 0);
data->buffer_type = MYSQL_TYPE_STRING;
data->buffer = malloc(length);
data->buffer_length = (unsigned long)length;
convert(value->c_str(), (char *)data->buffer, length);
dataLength = (unsigned long)(length - 1); // Don't add the null terminator.
nullValue = false;
}
void Value::setString(size_t length) {
clear();
data->buffer_type = MYSQL_TYPE_STRING;
data->buffer_length = (unsigned long)length;
if (length == 0)
data->buffer = null;
else
data->buffer = malloc(length);
dataLength = 0;
}
void Value::setNull() {
clear();
}
bool Value::isInt() const {
return data->buffer_type == MYSQL_TYPE_LONGLONG;
}
Long Value::getInt() const {
assert(isInt());
if (nullValue)
return 0;
if (data->is_unsigned)
return static_cast<Long>(localBuffer.unsignedVal);
else
return localBuffer.signedVal;
}
bool Value::isUInt() const {
return data->buffer_type == MYSQL_TYPE_LONGLONG;
}
Word Value::getUInt() const {
assert(isUInt());
if (nullValue)
return 0;
if (data->is_unsigned)
return localBuffer.unsignedVal;
else
return static_cast<Word>(localBuffer.signedVal);
}
bool Value::isFloat() const {
return data->buffer_type == MYSQL_TYPE_DOUBLE;
}
Double Value::getFloat() const {
assert(isFloat());
if (nullValue)
return 0;
return localBuffer.floatVal;
}
bool Value::isString() const {
return data->buffer_type == MYSQL_TYPE_STRING
|| data->buffer_type == MYSQL_TYPE_VAR_STRING;
}
Str *Value::getString(Engine &e) const {
assert(isString());
if (nullValue)
return new (e) Str();
if (data->buffer_length == 0 || dataLength == 0)
return new (e) Str();
const char *buffer = static_cast<const char *>(data->buffer);
GcArray<wchar> *converted = toWChar(e, buffer, dataLength);
return new (e) Str(converted);
}
bool Value::isNull() const {
return data->buffer_type == MYSQL_TYPE_NULL
|| nullValue;
}
void Value::clear() {
// Safeguard if we were not initialized.
if (!data)
return;
if (data->buffer && data->buffer != &localBuffer) {
free(data->buffer);
}
data->buffer = null;
data->buffer_type = MYSQL_TYPE_NULL;
nullValue = true;
data->is_unsigned = false;
error = false;
dataLength = 0;
}
}
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