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/* -*- C++ -*- */
/* Copyright (C) 2002 MySQL 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 */
#ifndef _SP_PCONTEXT_H_
#define _SP_PCONTEXT_H_
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
typedef enum
{
sp_param_in,
sp_param_out,
sp_param_inout
} sp_param_mode_t;
typedef struct
{
Item_string *name;
enum enum_field_types type;
sp_param_mode_t mode;
uint offset; // Offset in current frame
my_bool isset;
} sp_pvar_t;
typedef struct
{
char *name;
uint ip; // Instruction index
} sp_label_t;
class sp_pcontext : public Sql_alloc
{
sp_pcontext(const sp_pcontext &); /* Prevent use of these */
void operator=(sp_pcontext &);
public:
sp_pcontext();
inline uint
max_framesize()
{
return m_framesize;
}
inline uint
current_framesize()
{
return m_i;
}
inline uint
params()
{
return m_params;
}
// Set the number of parameters to the current esize
inline void
set_params()
{
m_params= m_i;
}
inline void
set_type(uint i, enum enum_field_types type)
{
if (i < m_i)
m_pvar[i].type= type;
}
inline void
set_isset(uint i, my_bool val)
{
if (i < m_i)
m_pvar[i].isset= val;
}
void
push(LEX_STRING *name, enum enum_field_types type, sp_param_mode_t mode);
// Pop the last 'num' slots of the frame
inline void
pop(uint num = 1)
{
if (num >= m_i)
m_i -= num;
}
// Find by name
sp_pvar_t *
find_pvar(LEX_STRING *name);
// Find by index
sp_pvar_t *
find_pvar(uint i)
{
if (i >= m_i)
return NULL;
return m_pvar+i;
}
void
push_label(char *name, uint ip);
void
push_gen_label(uint ip);
sp_label_t *
find_label(char *name);
inline sp_label_t *
last_label()
{
return m_label.head();
}
inline void
pop_label()
{
m_label.pop();
}
private:
uint m_params; // The number of parameters
uint m_framesize; // The maximum framesize
uint m_i; // The current index (during parsing)
sp_pvar_t *m_pvar;
uint m_pvar_size; // Current size of m_pvar.
void
grow();
List<sp_label_t> m_label; // The label list
uint m_genlab; // Gen. label counter
}; // class sp_pcontext : public Sql_alloc
#endif /* _SP_PCONTEXT_H_ */
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