зеркало из https://github.com/mozilla/gecko-dev.git
327 строки
10 KiB
Plaintext
327 строки
10 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 sts=2 expandtab
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozIStorageBaseStatement.idl"
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%{C++
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#include "mozilla/DebugOnly.h"
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%}
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[ptr] native octetPtr(uint8_t);
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/**
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* A SQL statement that can be used for both synchronous and asynchronous
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* purposes.
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*/
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[scriptable, builtinclass, uuid(5f567c35-6c32-4140-828c-683ea49cfd3a)]
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interface mozIStorageStatement : mozIStorageBaseStatement {
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/**
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* Create a clone of this statement, by initializing a new statement
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* with the same connection and same SQL statement as this one. It
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* does not preserve statement state; that is, if a statement is
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* being executed when it is cloned, the new statement will not be
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* executing.
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*/
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mozIStorageStatement clone();
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/*
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* Number of parameters
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*/
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readonly attribute unsigned long parameterCount;
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/**
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* Name of nth parameter, if given
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*/
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AUTF8String getParameterName(in unsigned long aParamIndex);
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/**
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* Returns the index of the named parameter.
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*
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* @param aName
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* The name of the parameter you want the index for. This does not
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* include the leading ':'.
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* @return the index of the named parameter.
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*/
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unsigned long getParameterIndex(in AUTF8String aName);
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/**
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* Number of columns returned
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*/
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readonly attribute unsigned long columnCount;
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/**
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* Name of nth column
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*/
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AUTF8String getColumnName(in unsigned long aColumnIndex);
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/**
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* Obtains the index of the column with the specified name.
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*
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* @param aName
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* The name of the column.
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* @return The index of the column with the specified name.
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*/
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unsigned long getColumnIndex(in AUTF8String aName);
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/**
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* Reset parameters/statement execution
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*/
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void reset();
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/**
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* Execute the query, ignoring any results. This is accomplished by
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* calling executeStep() once, and then calling reset().
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*
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* Error and last insert info, etc. are available from
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* the mozStorageConnection.
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*/
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void execute();
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/**
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* Execute a query, using any currently-bound parameters. Reset
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* must be called on the statement after the last call of
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* executeStep.
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*
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* @return a boolean indicating whether there are more rows or not;
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* row data may be accessed using mozIStorageValueArray methods on
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* the statement.
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*/
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boolean executeStep();
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/**
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* Execute a query, using any currently-bound parameters. Reset is called
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* when no more data is returned. This method is only available to JavaScript
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* consumers.
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*
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* @deprecated As of Mozilla 1.9.2 in favor of executeStep().
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*
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* @return a boolean indicating whether there are more rows or not.
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*
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* [deprecated] boolean step();
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*/
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/**
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* Obtains the current list of named parameters, which are settable. This
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* property is only available to JavaScript consumers.
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*
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* readonly attribute mozIStorageStatementParams params;
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*/
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/**
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* Obtains the current row, with access to all the data members by name. This
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* property is only available to JavaScript consumers.
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*
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* readonly attribute mozIStorageStatementRow row;
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*/
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//////////////////////////////////////////////////////////////////////////////
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//// Copied contents of mozIStorageValueArray
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/**
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* These type values are returned by getTypeOfIndex
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* to indicate what type of value is present at
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* a given column.
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*/
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const long VALUE_TYPE_NULL = 0;
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const long VALUE_TYPE_INTEGER = 1;
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const long VALUE_TYPE_FLOAT = 2;
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const long VALUE_TYPE_TEXT = 3;
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const long VALUE_TYPE_BLOB = 4;
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/**
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* The number of entries in the array (each corresponding to a column in the
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* database row)
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*/
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readonly attribute unsigned long numEntries;
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/**
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* Indicate the data type of the current result row for the the given column.
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* SQLite will perform type conversion if you ask for a value as a different
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* type than it is stored as.
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*
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* @param aIndex
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* 0-based column index.
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* @return The type of the value at the given column index; one of
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* VALUE_TYPE_NULL, VALUE_TYPE_INTEGER, VALUE_TYPE_FLOAT,
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* VALUE_TYPE_TEXT, VALUE_TYPE_BLOB.
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*/
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long getTypeOfIndex(in unsigned long aIndex);
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/**
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* Retrieve the contents of a column from the current result row as a
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* variant.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return A variant with the type of the column value.
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*/
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nsIVariant getVariant(in unsigned long aIndex);
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/**
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* Retrieve the contents of a column from the current result row as an
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* integer.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return Column value interpreted as an integer per type conversion rules.
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* @{
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*/
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long getInt32(in unsigned long aIndex);
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long long getInt64(in unsigned long aIndex);
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/** @} */
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/**
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* Retrieve the contents of a column from the current result row as a
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* floating point double.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return Column value interpreted as a double per type conversion rules.
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*/
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double getDouble(in unsigned long aIndex);
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/**
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* Retrieve the contents of a column from the current result row as a
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* string.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return The value for the result column interpreted as a string. If the
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* stored value was NULL, you will get an empty string with IsVoid set
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* to distinguish it from an explicitly set empty string.
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* @{
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*/
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AUTF8String getUTF8String(in unsigned long aIndex);
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AString getString(in unsigned long aIndex);
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/** @} */
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/**
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* Retrieve the contents of a column from the current result row as a
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* blob.
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*
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* @param aIndex
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* 0-based colummn index.
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* @param[out] aDataSize
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* The number of bytes in the blob.
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* @param[out] aData
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* The contents of the BLOB. This will be NULL if aDataSize == 0.
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*/
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void getBlob(in unsigned long aIndex, out unsigned long aDataSize, [array,size_is(aDataSize)] out octet aData);
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/**
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* Retrieve the contents of a Blob column from the current result row as a
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* string.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return The value for the result Blob column interpreted as a String.
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* No encoding conversion is performed.
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*/
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AString getBlobAsString(in unsigned long aIndex);
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/**
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* Retrieve the contents of a Blob column from the current result row as a
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* UTF8 string.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return The value for the result Blob column interpreted as a UTF8 String.
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* No encoding conversion is performed.
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*/
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AUTF8String getBlobAsUTF8String(in unsigned long aIndex);
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/**
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* Check whether the given column in the current result row is NULL.
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*
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* @param aIndex
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* 0-based colummn index.
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* @return true if the value for the result column is null.
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*/
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boolean getIsNull(in unsigned long aIndex);
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/**
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* Returns a shared string pointer.
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*
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* @param aIndex
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* 0-based colummn index.
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* @param aByteLength
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* The number of bytes in the string or blob. This is the same as the
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* number of characters for UTF-8 strings, and twice the number of
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* characters for UTF-16 strings.
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* @param aResult
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* A pointer to the string or blob.
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*/
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[noscript] void getSharedUTF8String(in unsigned long aIndex, out unsigned long aByteLength, [shared,retval] out string aResult);
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[noscript] void getSharedString(in unsigned long aIndex, out unsigned long aByteLength, [shared,retval] out wstring aResult);
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[noscript] void getSharedBlob(in unsigned long aIndex, out unsigned long aByteLength, [shared,retval] out octetPtr aResult);
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/**
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* Getters for native code that return their values as
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* the return type, for convenience and sanity.
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*
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* Not virtual; no vtable bloat.
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*/
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%{C++
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inline int32_t AsInt32(uint32_t idx) {
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int32_t v = 0;
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mozilla::DebugOnly<nsresult> rv = GetInt32(idx, &v);
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MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
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"Getting value failed, wrong column index?");
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return v;
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}
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inline int64_t AsInt64(uint32_t idx) {
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int64_t v = 0;
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mozilla::DebugOnly<nsresult> rv = GetInt64(idx, &v);
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MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
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"Getting value failed, wrong column index?");
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return v;
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}
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inline double AsDouble(uint32_t idx) {
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double v = 0.0;
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mozilla::DebugOnly<nsresult> rv = GetDouble(idx, &v);
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MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
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"Getting value failed, wrong column index?");
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return v;
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}
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inline const char* AsSharedUTF8String(uint32_t idx, uint32_t *len) {
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const char *str = nullptr;
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*len = 0;
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mozilla::DebugOnly<nsresult> rv = GetSharedUTF8String(idx, len, &str);
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MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
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"Getting value failed, wrong column index?");
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return str;
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}
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inline const char16_t* AsSharedWString(uint32_t idx, uint32_t *len) {
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const char16_t *str = nullptr;
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*len = 0;
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mozilla::DebugOnly<nsresult> rv = GetSharedString(idx, len, &str);
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MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
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"Getting value failed, wrong column index?");
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return str;
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}
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inline const uint8_t* AsSharedBlob(uint32_t idx, uint32_t *len) {
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const uint8_t *blob = nullptr;
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*len = 0;
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mozilla::DebugOnly<nsresult> rv = GetSharedBlob(idx, len, &blob);
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MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
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"Getting value failed, wrong column index?");
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return blob;
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}
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inline bool IsNull(uint32_t idx) {
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bool b = false;
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mozilla::DebugOnly<nsresult> rv = GetIsNull(idx, &b);
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MOZ_ASSERT(NS_SUCCEEDED(rv),
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"Getting value failed, wrong column index?");
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return b;
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}
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%}
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};
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