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#include "row.h"
#include <stdexcept>
#include <string>
namespace MyGrate {
Row::Row(const st_mariadb_rpl_rows_event & r, const st_mariadb_rpl_table_map_event & t) : row {r}, tm {t} { }
void
Row::forEachField(const std::function<void(MySQL::FieldValue)> & cb)
{
MyGrate::RawDataReader md {tm.metadata};
MyGrate::RawDataReader data {row.row_data, row.row_data_size};
const size_t flagBytes {(tm.column_count + 7) / 8};
MyGrate::BitSet nullFlags {data.viewValue<std::span<const std::byte>>(flagBytes)};
MyGrate::BitSet columnFlags {{reinterpret_cast<const std::byte *>(row.column_bitmap), flagBytes}};
auto nullIter {nullFlags.begin()};
auto colIter {columnFlags.begin()};
for (auto c {0U}; c < tm.column_count; c++) {
if (*colIter) {
const enum_field_types type {(enum_field_types)(unsigned char)tm.column_types.str[c]};
const auto null {*nullIter};
if (null) {
switch (type) {
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET:
case MYSQL_TYPE_NEWDECIMAL:
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
md.discard(2);
break;
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_FLOAT:
case MYSQL_TYPE_DOUBLE:
case MYSQL_TYPE_TIMESTAMP2:
case MYSQL_TYPE_DATETIME2:
case MYSQL_TYPE_TIME2:
md.discard(1);
break;
default:;
}
cb(nullptr);
}
else {
switch (type) {
#define TYPE_CALLBACK(T) \
case T: \
cb(MySQL::Type<T>::read(md, data)); \
break
TYPE_CALLBACK(MYSQL_TYPE_DECIMAL);
TYPE_CALLBACK(MYSQL_TYPE_TINY);
TYPE_CALLBACK(MYSQL_TYPE_SHORT);
TYPE_CALLBACK(MYSQL_TYPE_LONG);
TYPE_CALLBACK(MYSQL_TYPE_FLOAT);
TYPE_CALLBACK(MYSQL_TYPE_DOUBLE);
TYPE_CALLBACK(MYSQL_TYPE_NULL);
TYPE_CALLBACK(MYSQL_TYPE_TIMESTAMP);
TYPE_CALLBACK(MYSQL_TYPE_LONGLONG);
TYPE_CALLBACK(MYSQL_TYPE_INT24);
TYPE_CALLBACK(MYSQL_TYPE_DATE);
TYPE_CALLBACK(MYSQL_TYPE_TIME);
TYPE_CALLBACK(MYSQL_TYPE_DATETIME);
TYPE_CALLBACK(MYSQL_TYPE_YEAR);
TYPE_CALLBACK(MYSQL_TYPE_NEWDATE);
TYPE_CALLBACK(MYSQL_TYPE_BIT);
TYPE_CALLBACK(MYSQL_TYPE_TIMESTAMP2);
TYPE_CALLBACK(MYSQL_TYPE_TIME2);
TYPE_CALLBACK(MYSQL_TYPE_JSON);
TYPE_CALLBACK(MYSQL_TYPE_NEWDECIMAL);
TYPE_CALLBACK(MYSQL_TYPE_ENUM);
TYPE_CALLBACK(MYSQL_TYPE_SET);
TYPE_CALLBACK(MYSQL_TYPE_TINY_BLOB);
TYPE_CALLBACK(MYSQL_TYPE_MEDIUM_BLOB);
TYPE_CALLBACK(MYSQL_TYPE_LONG_BLOB);
TYPE_CALLBACK(MYSQL_TYPE_BLOB);
TYPE_CALLBACK(MYSQL_TYPE_GEOMETRY);
TYPE_CALLBACK(MYSQL_TYPE_VAR_STRING);
TYPE_CALLBACK(MYSQL_TYPE_VARCHAR);
TYPE_CALLBACK(MYSQL_TYPE_DATETIME2);
TYPE_CALLBACK(MYSQL_TYPE_STRING);
#undef TYPE_CALLBACK
case MAX_NO_FIELD_TYPES:
// This is why you don't the end of the enum as member!
#ifdef NDEBUG
[[fallthrough]];
default:
#endif
throw std::logic_error("Unknown type: " + std::to_string(type));
}
}
++nullIter;
}
++colIter;
}
}
}
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