moved around files

panel-mgmt_backend/node_modules/mysql2/lib/parsers/binary_parser.js

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+'use strict';
+
+const FieldFlags = require('../constants/field_flags.js');
+const Charsets = require('../constants/charsets.js');
+const Types = require('../constants/types.js');
+const helpers = require('../helpers');
+const genFunc = require('generate-function');
+const parserCache = require('./parser_cache.js');
+const typeNames = [];
+for (const t in Types) {
+  typeNames[Types[t]] = t;
+}
+
+function readCodeFor(field, config, options, fieldNum) {
+  const supportBigNumbers = Boolean(
+    options.supportBigNumbers || config.supportBigNumbers
+  );
+  const bigNumberStrings = Boolean(
+    options.bigNumberStrings || config.bigNumberStrings
+  );
+  const timezone = options.timezone || config.timezone;
+  const dateStrings = options.dateStrings || config.dateStrings;
+  const unsigned = field.flags & FieldFlags.UNSIGNED;
+  switch (field.columnType) {
+    case Types.TINY:
+      return unsigned ? 'packet.readInt8();' : 'packet.readSInt8();';
+    case Types.SHORT:
+      return unsigned ? 'packet.readInt16();' : 'packet.readSInt16();';
+    case Types.LONG:
+    case Types.INT24: // in binary protocol int24 is encoded in 4 bytes int32
+      return unsigned ? 'packet.readInt32();' : 'packet.readSInt32();';
+    case Types.YEAR:
+      return 'packet.readInt16()';
+    case Types.FLOAT:
+      return 'packet.readFloat();';
+    case Types.DOUBLE:
+      return 'packet.readDouble();';
+    case Types.NULL:
+      return 'null;';
+    case Types.DATE:
+    case Types.DATETIME:
+    case Types.TIMESTAMP:
+    case Types.NEWDATE:
+      if (helpers.typeMatch(field.columnType, dateStrings, Types)) {
+        return `packet.readDateTimeString(${parseInt(field.decimals, 10)}, ${null}, ${field.columnType});`;
+      }
+      return `packet.readDateTime(${helpers.srcEscape(timezone)});`;
+    case Types.TIME:
+      return 'packet.readTimeString()';
+    case Types.DECIMAL:
+    case Types.NEWDECIMAL:
+      if (config.decimalNumbers) {
+        return 'packet.parseLengthCodedFloat();';
+      }
+      return 'packet.readLengthCodedString("ascii");';
+    case Types.GEOMETRY:
+      return 'packet.parseGeometryValue();';
+    case Types.VECTOR:
+      return 'packet.parseVector()';
+    case Types.JSON:
+      // Since for JSON columns mysql always returns charset 63 (BINARY),
+      // we have to handle it according to JSON specs and use "utf8",
+      // see https://github.com/sidorares/node-mysql2/issues/409
+      return config.jsonStrings
+        ? 'packet.readLengthCodedString("utf8")'
+        : 'JSON.parse(packet.readLengthCodedString("utf8"));';
+    case Types.LONGLONG:
+      if (!supportBigNumbers) {
+        return unsigned
+          ? 'packet.readInt64JSNumber();'
+          : 'packet.readSInt64JSNumber();';
+      }
+      if (bigNumberStrings) {
+        return unsigned
+          ? 'packet.readInt64String();'
+          : 'packet.readSInt64String();';
+      }
+      return unsigned ? 'packet.readInt64();' : 'packet.readSInt64();';
+
+    default:
+      if (field.characterSet === Charsets.BINARY) {
+        return 'packet.readLengthCodedBuffer();';
+      }
+      return `packet.readLengthCodedString(fields[${fieldNum}].encoding)`;
+  }
+}
+
+function compile(fields, options, config) {
+  const parserFn = genFunc();
+  const nullBitmapLength = Math.floor((fields.length + 7 + 2) / 8);
+
+  function wrap(field, packet) {
+    return {
+      type: typeNames[field.columnType],
+      length: field.columnLength,
+      db: field.schema,
+      table: field.table,
+      name: field.name,
+      string: function (encoding = field.encoding) {
+        if (field.columnType === Types.JSON && encoding === field.encoding) {
+          // Since for JSON columns mysql always returns charset 63 (BINARY),
+          // we have to handle it according to JSON specs and use "utf8",
+          // see https://github.com/sidorares/node-mysql2/issues/1661
+          console.warn(
+            `typeCast: JSON column "${field.name}" is interpreted as BINARY by default, recommended to manually set utf8 encoding: \`field.string("utf8")\``
+          );
+        }
+
+        if (
+          [Types.DATETIME, Types.NEWDATE, Types.TIMESTAMP, Types.DATE].includes(
+            field.columnType
+          )
+        ) {
+          return packet.readDateTimeString(parseInt(field.decimals, 10));
+        }
+
+        if (field.columnType === Types.TINY) {
+          const unsigned = field.flags & FieldFlags.UNSIGNED;
+
+          return String(unsigned ? packet.readInt8() : packet.readSInt8());
+        }
+
+        if (field.columnType === Types.TIME) {
+          return packet.readTimeString();
+        }
+
+        return packet.readLengthCodedString(encoding);
+      },
+      buffer: function () {
+        return packet.readLengthCodedBuffer();
+      },
+      geometry: function () {
+        return packet.parseGeometryValue();
+      },
+    };
+  }
+
+  parserFn('(function(){');
+  parserFn('return class BinaryRow {');
+  parserFn('constructor() {');
+  parserFn('}');
+
+  parserFn('next(packet, fields, options) {');
+  if (options.rowsAsArray) {
+    parserFn(`const result = new Array(${fields.length});`);
+  } else {
+    parserFn('const result = {};');
+  }
+
+  // Global typeCast
+  if (
+    typeof config.typeCast === 'function' &&
+    typeof options.typeCast !== 'function'
+  ) {
+    options.typeCast = config.typeCast;
+  }
+
+  parserFn('packet.readInt8();'); // status byte
+  for (let i = 0; i < nullBitmapLength; ++i) {
+    parserFn(`const nullBitmaskByte${i} = packet.readInt8();`);
+  }
+
+  let lvalue = '';
+  let currentFieldNullBit = 4;
+  let nullByteIndex = 0;
+  let fieldName = '';
+  let tableName = '';
+
+  for (let i = 0; i < fields.length; i++) {
+    fieldName = helpers.fieldEscape(fields[i].name);
+    // parserFn(`// ${fieldName}: ${typeNames[fields[i].columnType]}`);
+
+    if (typeof options.nestTables === 'string') {
+      lvalue = `result[${helpers.fieldEscape(fields[i].table + options.nestTables + fields[i].name)}]`;
+    } else if (options.nestTables === true) {
+      tableName = helpers.fieldEscape(fields[i].table);
+
+      parserFn(`if (!result[${tableName}]) result[${tableName}] = {};`);
+      lvalue = `result[${tableName}][${fieldName}]`;
+    } else if (options.rowsAsArray) {
+      lvalue = `result[${i.toString(10)}]`;
+    } else {
+      lvalue = `result[${fieldName}]`;
+    }
+
+    parserFn(`if (nullBitmaskByte${nullByteIndex} & ${currentFieldNullBit}) `);
+    parserFn(`${lvalue} = null;`);
+    parserFn('else {');
+
+    if (options.typeCast === false) {
+      parserFn(`${lvalue} = packet.readLengthCodedBuffer();`);
+    } else {
+      const fieldWrapperVar = `fieldWrapper${i}`;
+      parserFn(`const ${fieldWrapperVar} = wrap(fields[${i}], packet);`);
+      const readCode = readCodeFor(fields[i], config, options, i);
+
+      if (typeof options.typeCast === 'function') {
+        parserFn(
+          `${lvalue} = options.typeCast(${fieldWrapperVar}, function() { return ${readCode} });`
+        );
+      } else {
+        parserFn(`${lvalue} = ${readCode};`);
+      }
+    }
+    parserFn('}');
+
+    currentFieldNullBit *= 2;
+    if (currentFieldNullBit === 0x100) {
+      currentFieldNullBit = 1;
+      nullByteIndex++;
+    }
+  }
+
+  parserFn('return result;');
+  parserFn('}');
+  parserFn('};')('})()');
+
+  if (config.debug) {
+    helpers.printDebugWithCode(
+      'Compiled binary protocol row parser',
+      parserFn.toString()
+    );
+  }
+  return parserFn.toFunction({ wrap });
+}
+
+function getBinaryParser(fields, options, config) {
+  return parserCache.getParser('binary', fields, options, config, compile);
+}
+
+module.exports = getBinaryParser;