#ifndef GSTREAM_INCLUDED
#define GSTREAM_INCLUDED
/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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 ; version 2 of the License .
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include <my_sys.h> /* MY_ALLOW_ZERO_PTR */
#include "m_ctype.h" /* my_charset_latin1, my_charset_bin */
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_wkt(buffer)
, m_cur(buffer)
, m_limit(buffer + size)
, m_err_msg(NULL)
, m_charset(charset)
{}
Gis_read_stream()
: m_wkt(NullS)
, m_cur(NullS)
, m_limit(NullS)
, m_err_msg(NullS)
{}
~Gis_read_stream()
{
my_free(m_err_msg);
}
enum enum_tok_types get_next_toc_type();
bool lookup_next_word(LEX_STRING *res);
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 ;
}
/* Returns the next notempty character. */
char next_symbol()
{
skip_space();
if (m_cur >= m_limit)
return 0 ; /* EOL meet. */
return *m_cur;
}
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;
}
const char *get_wkt() const
{
return m_wkt;
}
protected :
const char *const m_wkt;
const char *m_cur;
const char *m_limit;
char *m_err_msg;
CHARSET_INFO *m_charset;
};
#endif /* GSTREAM_INCLUDED */
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