gstream.h
上传用户:romrleung
上传日期:2022-05-23
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文件大小:2k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- class Gis_read_stream
- {
- public:
- enum enum_tok_types
- {
- unknown,
- eostream,
- word,
- numeric,
- l_bra,
- r_bra,
- comma
- };
- Gis_read_stream(CHARSET_INFO *charset, const char *buffer, int size)
- :m_cur(buffer), m_limit(buffer + size), m_err_msg(NULL), m_charset(charset)
- {}
- Gis_read_stream(): m_cur(NullS), m_limit(NullS), m_err_msg(NullS)
- {}
- ~Gis_read_stream()
- {
- my_free(m_err_msg, MYF(MY_ALLOW_ZERO_PTR));
- }
- enum enum_tok_types get_next_toc_type();
- bool get_next_word(LEX_STRING *);
- bool get_next_number(double *);
- bool check_next_symbol(char);
- inline void skip_space()
- {
- while ((m_cur < m_limit) && my_isspace(&my_charset_latin1, *m_cur))
- m_cur++;
- }
- /* Skip next character, if match. Return 1 if no match */
- inline bool skip_char(char skip)
- {
- skip_space();
- if ((m_cur >= m_limit) || *m_cur != skip)
- return 1; /* Didn't find char */
- m_cur++;
- return 0;
- }
- void set_error_msg(const char *msg);
- // caller should free this pointer
- char *get_error_msg()
- {
- char *err_msg = m_err_msg;
- m_err_msg= NullS;
- return err_msg;
- }
- protected:
- const char *m_cur;
- const char *m_limit;
- char *m_err_msg;
- CHARSET_INFO *m_charset;
- };