diff options
Diffstat (limited to 'sql/sp_pcontext.h')
| -rw-r--r-- | sql/sp_pcontext.h | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/sql/sp_pcontext.h b/sql/sp_pcontext.h new file mode 100644 index 00000000000..23be38edcbf --- /dev/null +++ b/sql/sp_pcontext.h @@ -0,0 +1,242 @@ +/* -*- 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 sp_pvar +{ + LEX_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 sp_label +{ + char *name; + uint ip; // Instruction index +} sp_label_t; + +typedef struct sp_cond_type +{ + enum { number, state, warning, notfound, exception } type; + char sqlstate[6]; + uint mysqlerr; +} sp_cond_type_t; + +typedef struct sp_cond +{ + LEX_STRING name; + sp_cond_type_t *val; +} sp_cond_t; + +class sp_pcontext : public Sql_alloc +{ + sp_pcontext(const sp_pcontext &); /* Prevent use of these */ + void operator=(sp_pcontext &); + + public: + + sp_pcontext(); + + // Free memory + void + destroy(); + + // + // Parameters and variables + // + + inline uint + max_framesize() + { + return m_framesize; + } + + inline uint + current_framesize() + { + return m_pvar.elements; + } + + inline uint + params() + { + return m_params; + } + + // Set the number of parameters to the current esize + inline void + set_params() + { + m_params= m_pvar.elements; + } + + inline void + set_type(uint i, enum enum_field_types type) + { + sp_pvar_t *p= find_pvar(i); + + if (p) + p->type= type; + } + + inline void + set_isset(uint i, my_bool val) + { + sp_pvar_t *p= find_pvar(i); + + if (p) + p->isset= val; + } + + void + push_pvar(LEX_STRING *name, enum enum_field_types type, sp_param_mode_t mode); + + // Pop the last 'num' slots of the frame + inline void + pop_pvar(uint num = 1) + { + while (num--) + pop_dynamic(&m_pvar); + } + + // Find by name + sp_pvar_t * + find_pvar(LEX_STRING *name); + + // Find by index + sp_pvar_t * + find_pvar(uint i) + { + sp_pvar_t *p; + + if (i < m_pvar.elements) + get_dynamic(&m_pvar, (gptr)&p, i); + else + p= NULL; + return p; + } + + // + // Labels + // + + sp_label_t * + push_label(char *name, uint ip); + + sp_label_t * + find_label(char *name); + + inline sp_label_t * + last_label() + { + return m_label.head(); + } + + inline sp_label_t * + pop_label() + { + return m_label.pop(); + } + + // + // Conditions + // + + void + push_cond(LEX_STRING *name, sp_cond_type_t *val); + + inline void + pop_cond(uint num) + { + while (num--) + pop_dynamic(&m_cond); + } + + sp_cond_type_t * + find_cond(LEX_STRING *name); + + // + // Handlers + // + + inline void + add_handler() + { + m_handlers+= 1; + } + + inline uint + handlers() + { + return m_handlers; + } + + // + // Cursors + // + + void + push_cursor(LEX_STRING *name); + + my_bool + find_cursor(LEX_STRING *name, uint *poff); + + inline void + pop_cursor(uint num) + { + while (num--) + pop_dynamic(&m_cursor); + } + + inline uint + cursors() + { + return m_cursmax; + } + +private: + + uint m_params; // The number of parameters + uint m_framesize; // The maximum framesize + uint m_handlers; // The total number of handlers + uint m_cursmax; // The maximum number of cursors + + DYNAMIC_ARRAY m_pvar; // Parameters/variables + DYNAMIC_ARRAY m_cond; // Conditions + DYNAMIC_ARRAY m_cursor; // Cursors + + List<sp_label_t> m_label; // The label list + +}; // class sp_pcontext : public Sql_alloc + + +#endif /* _SP_PCONTEXT_H_ */ |