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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <drizzled/server_includes.h>
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#include <drizzled/function/str/repeat.h>
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#include <drizzled/error.h>
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#include <drizzled/function/str/alloc_buffer.h>
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#include <drizzled/session.h>
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void Item_func_repeat::fix_length_and_dec()
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collation.set(args[0]->collation);
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if (args[1]->const_item())
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/* must be int64_t to avoid truncation */
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int64_t count= args[1]->val_int();
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/* Assumes that the maximum length of a String is < INT32_MAX. */
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/* Set here so that rest of code sees out-of-bound value as such. */
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if (count > INT32_MAX)
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uint64_t max_result_length= (uint64_t) args[0]->max_length * count;
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if (max_result_length >= MAX_BLOB_WIDTH)
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max_result_length= MAX_BLOB_WIDTH;
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max_length= (ulong) max_result_length;
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max_length= MAX_BLOB_WIDTH;
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Item_func_repeat::str is carefully written to avoid reallocs
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as much as possible at the cost of a local buffer
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String *Item_func_repeat::val_str(String *str)
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uint32_t length,tot_length;
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/* must be int64_t to avoid truncation */
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int64_t count= args[1]->val_int();
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String *res= args[0]->val_str(str);
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if (args[0]->null_value || args[1]->null_value)
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goto err; // string and/or delim are null
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if (count <= 0 && (count == 0 || !args[1]->unsigned_flag))
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return &my_empty_string;
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/* Assumes that the maximum length of a String is < INT32_MAX. */
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/* Bounds check on count: If this is triggered, we will error. */
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if ((uint64_t) count > INT32_MAX)
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if (count == 1) // To avoid reallocs
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if (length > current_session->variables.max_allowed_packet / (uint) count)
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push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
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ER_WARN_ALLOWED_PACKET_OVERFLOWED,
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ER(ER_WARN_ALLOWED_PACKET_OVERFLOWED),
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func_name(), current_session->variables.max_allowed_packet);
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tot_length= length*(uint) count;
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if (!(res= alloc_buffer(res,str,&tmp_value,tot_length)))
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to=(char*) res->ptr()+length;
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memcpy(to,res->ptr(),length);