00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*- 00002 * vim:expandtab:shiftwidth=2:tabstop=2:smarttab: 00003 * 00004 * Copyright (C) 2008 Sun Microsystems, Inc. 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; version 2 of the License. 00009 * 00010 * This program is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 * GNU General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU General Public License 00016 * along with this program; if not, write to the Free Software 00017 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00018 */ 00019 00020 00021 #pragma once 00022 00023 #include <drizzled/select_to_file.h> 00024 00025 /* 00026 List of all possible characters of a numeric value text representation. 00027 */ 00028 #define NUMERIC_CHARS ".0123456789e+-" 00029 00030 namespace drizzled 00031 { 00032 00033 class select_export : 00034 public select_to_file 00035 { 00036 uint32_t field_term_length; 00037 int field_sep_char,escape_char,line_sep_char; 00038 int field_term_char; // first char of FIELDS TERMINATED BY or MAX_INT 00039 /* 00040 The is_ambiguous_field_sep field is true if a value of the field_sep_char 00041 field is one of the 'n', 't', 'r' etc characters 00042 (see the READ_INFO::unescape method and the ESCAPE_CHARS constant value). 00043 */ 00044 bool is_ambiguous_field_sep; 00045 /* 00046 The is_ambiguous_field_term is true if field_sep_char contains the first 00047 char of the FIELDS TERMINATED BY (ENCLOSED BY is empty), and items can 00048 contain this character. 00049 */ 00050 bool is_ambiguous_field_term; 00051 /* 00052 The is_unsafe_field_sep field is true if a value of the field_sep_char 00053 field is one of the '0'..'9', '+', '-', '.' and 'e' characters 00054 (see the NUMERIC_CHARS constant value). 00055 */ 00056 bool is_unsafe_field_sep; 00057 bool fixed_row_size; 00058 public: 00059 select_export(file_exchange *ex) : 00060 select_to_file(ex), 00061 field_term_length(0), 00062 field_sep_char(0), 00063 escape_char(0), 00064 line_sep_char(0), 00065 field_term_char(0), 00066 is_ambiguous_field_sep(0), 00067 is_ambiguous_field_term(0), 00068 is_unsafe_field_sep(0), 00069 fixed_row_size(0) 00070 {} 00071 ~select_export(); 00072 int prepare(List<Item> &list, Select_Lex_Unit *u); 00073 bool send_data(List<Item> &items); 00074 private: 00075 inline bool needs_escaping(char character, bool enclosed) 00076 { 00077 if ((character == escape_char) || 00078 (enclosed ? character == field_sep_char : character == field_term_char) || 00079 character == line_sep_char || 00080 (character == 0)) 00081 return true; 00082 00083 return false; 00084 00085 } 00086 }; 00087 00088 } /* namespace drizzled */ 00089