/* -*- 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_RCONTEXT_H_ #define _SP_RCONTEXT_H_ #ifdef __GNUC__ #pragma interface /* gcc class implementation */ #endif struct sp_cond_type; #define SP_HANDLER_NONE 0 #define SP_HANDLER_EXIT 1 #define SP_HANDLER_CONTINUE 2 #define SP_HANDLER_UNDO 3 typedef struct { struct sp_cond_type *cond; uint handler; // Location of handler int type; uint foffset; // Frame offset for the handlers declare level } sp_handler_t; class sp_rcontext : public Sql_alloc { sp_rcontext(const sp_rcontext &); /* Prevent use of these */ void operator=(sp_rcontext &); public: sp_rcontext(uint fsize, uint hmax); ~sp_rcontext() { // Not needed? //sql_element_free(m_frame); //m_saved.empty(); } inline void push_item(Item *i) { if (m_count < m_fsize) m_frame[m_count++] = i; } inline void set_item(uint idx, Item *i) { if (idx < m_count) m_frame[idx] = i; } inline Item * get_item(uint idx) { return m_frame[idx]; } inline void set_oindex(uint idx, int oidx) { m_outs[idx] = oidx; } inline int get_oindex(uint idx) { return m_outs[idx]; } inline void set_result(Item *it) { m_result= it; } inline Item * get_result() { return m_result; } inline void push_handler(struct sp_cond_type *cond, uint h, int type, uint f) { m_handler[m_hcount].cond= cond; m_handler[m_hcount].handler= h; m_handler[m_hcount].type= type; m_handler[m_hcount].foffset= f; m_hcount+= 1; } inline void pop_handlers(uint count) { m_hcount-= count; } // Returns 1 if a handler was found, 0 otherwise. int find_handler(uint sql_errno); // Returns handler type and sets *ip to location if one was found inline int found_handler(uint *ip, uint *fp) { if (m_hfound < 0) return SP_HANDLER_NONE; *ip= m_handler[m_hfound].handler; *fp= m_handler[m_hfound].foffset; return m_handler[m_hfound].type; } // Clears the handler find state inline void clear_handler() { m_hfound= -1; } inline void push_hstack(uint h) { m_hstack[m_hsp++]= h; } inline uint pop_hstack() { return m_hstack[--m_hsp]; } // Save variables starting at fp and up void save_variables(uint fp); // Restore variables down to fp void restore_variables(uint fp); private: uint m_count; uint m_fsize; Item **m_frame; int *m_outs; Item *m_result; // For FUNCTIONs sp_handler_t *m_handler; uint m_hcount; uint *m_hstack; uint m_hsp; int m_hfound; // Set by find_handler; -1 if not found List<Item> m_saved; // Saved variables }; // class sp_rcontext : public Sql_alloc #endif /* _SP_RCONTEXT_H_ */