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/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
|| $Id: errors.h,v 1.33 2006/07/05 19:24:18 mast Exp $ 
*/ 
 
#ifdef ERR_DECLARE 
#define DECLARE_ERROR(NAME, SCNAME, INHERIT, DECL) \ 
PMOD_EXPORT struct program *PIKE_CONCAT(NAME,_error_program); \ 
ptrdiff_t PIKE_CONCAT(NAME,_error_offset);  
 
#define ERR_VAR(TYPE,CTYPE,RUNTYPE,NAME) TYPE NAME ; 
#endif 
 
#ifdef ERR_EXT_DECLARE 
#define DECLARE_ERROR(NAME, SCNAME, INHERIT, DECL) \ 
PMOD_EXPORT extern struct program *PIKE_CONCAT(NAME,_error_program); \ 
extern ptrdiff_t PIKE_CONCAT(NAME,_error_offset); \ 
struct PIKE_CONCAT(NAME,_error_struct) { \ 
  DECL \ 
}; 
 
#define ERR_VAR(TYPE,CTYPE,RUNTYPE,NAME) TYPE NAME ; 
 
/* Some compilers (eg cl) don't like empty structs... */ 
#define EMPTY ERR_VAR(INT_TYPE, int, PIKE_T_INT, ignored__) 
 
#endif /* ERR_EXT_DECLARE */ 
 
#ifdef ERR_SETUP 
#define DECLARE_ERROR(NAME, SCNAME, INHERIT, DECL) do{\ 
  ptrdiff_t current_offset=0; \ 
  struct PIKE_CONCAT(NAME,_error_struct) foo; \ 
  start_new_program(); \ 
  INHERIT \ 
  current_offset = PIKE_CONCAT(NAME,_error_offset) = \ 
    ADD_STORAGE(struct PIKE_CONCAT(NAME,_error_struct));\ 
  add_string_constant("error_type", #SCNAME, 0); \ 
  add_integer_constant("is_" #NAME "_error",1,0); \ 
  DECL \ 
  PIKE_CONCAT(NAME,_error_program)=end_program(); \ 
  add_program_constant( #SCNAME "Error",PIKE_CONCAT(NAME,_error_program),0); \ 
}while(0); 
 
#define ERR_VAR(TYPE,CTYPE,RUNTYPE,NAME2) \ 
  MAP_VARIABLE(#NAME2, CTYPE, 0, \ 
               current_offset + (((char *)&(foo.NAME2))-((char *)&foo)), RUNTYPE); 
 
/* Reference foo just to avoid warning. */ 
#define EMPTY &foo; 
 
#define ERR_INHERIT(NAME) \ 
  low_inherit(PIKE_CONCAT(NAME,_error_program),0,0,0,0,0); 
 
#define ERR_FUNC(NAME,FUNC,TYPE,FLAGS) \ 
  ADD_FUNCTION(NAME,FUNC,TYPE,FLAGS); 
 
#endif 
 
#ifdef ERR_CLEANUP 
#define DECLARE_ERROR(NAME, SCNAME, INHERIT, DECL) \ 
  if(PIKE_CONCAT(NAME,_error_program)) {\ 
    free_program(PIKE_CONCAT(NAME,_error_program)); \ 
    PIKE_CONCAT(NAME,_error_program)=0;\ 
  } 
#endif 
 
 
#ifndef ERR_INHERIT 
#define ERR_INHERIT(NAME) 
#endif 
 
#ifndef ERR_VAR 
#define ERR_VAR(TYPE,CTYPE,RUNTYPE,NAME) 
#endif 
 
#ifndef ERR_FUNC 
#define ERR_FUNC(NAME,FUNC,TYPE,FLAGS) 
#endif 
 
DECLARE_ERROR(generic, Generic, EMPTY , 
  ERR_VAR(struct pike_string *,tStr,PIKE_T_STRING,error_message) 
  ERR_VAR(struct array *,tArray,PIKE_T_ARRAY,error_backtrace) 
  ERR_FUNC("cast",f_error_cast,tFunc(tString,tArray),ID_STATIC) 
  ERR_FUNC("`[]",f_error_index,tFunc(tInt01,tMixed),ID_STATIC) 
  ERR_FUNC("describe",f_error_describe,tFunc(tVoid,tString),0) 
  ERR_FUNC("message", f_error_message, tFunc(tVoid,tString), 0) 
  ERR_FUNC("backtrace",f_error_backtrace,tFunc(tVoid,tArr(tMixed)),0) 
  ERR_FUNC("_sprintf", f_error__sprintf, 
           tFunc(tOr(tInt,tVoid) tOr(tMapping,tVoid),tString), ID_STATIC) 
  ERR_FUNC("create",f_error_create,tFunc(tStr tOr(tVoid,tArr(tMixed)),tVoid),ID_STATIC) 
) 
 
#define GENERIC_ERROR_THIS ((struct generic_error_struct *)CURRENT_STORAGE) 
 
DECLARE_ERROR(index, Index, 
              ERR_INHERIT(generic), 
  ERR_VAR(struct svalue, tMix, PIKE_T_MIXED, value) 
  ERR_VAR(struct svalue, tMix, PIKE_T_MIXED, index) 
) 
 
DECLARE_ERROR(bad_argument, BadArgument, 
              ERR_INHERIT(generic), 
  ERR_VAR(INT_TYPE, tInt, PIKE_T_INT, which_argument) 
  ERR_VAR(struct pike_string *, tStr,PIKE_T_STRING,expected_type) 
  ERR_VAR(struct svalue, tMix, PIKE_T_MIXED, got_value) 
) 
 
DECLARE_ERROR(math, Math, 
              ERR_INHERIT(generic), 
  ERR_VAR(struct svalue, tMix, PIKE_T_MIXED, number) 
) 
 
DECLARE_ERROR(resource, Resource, 
              ERR_INHERIT(generic), 
  ERR_VAR(struct pike_string *, tStr, PIKE_T_STRING,resource_type) 
  ERR_VAR(INT_TYPE, tInt, PIKE_T_INT, howmuch) 
) 
 
DECLARE_ERROR(permission, Permission, 
              ERR_INHERIT(generic), 
  ERR_VAR(struct pike_string *, tStr, PIKE_T_STRING,permission_type) 
) 
 
DECLARE_ERROR(cpp, Cpp, ERR_INHERIT(generic), EMPTY) 
 
DECLARE_ERROR(compilation, Compilation, ERR_INHERIT(generic), EMPTY) 
 
DECLARE_ERROR(master_load, MasterLoad, ERR_INHERIT (generic), EMPTY) 
 
DECLARE_ERROR (module_load, ModuleLoad, 
               ERR_INHERIT (generic), 
  ERR_VAR (struct pike_string *, tStr, PIKE_T_STRING, path) 
  ERR_VAR (struct pike_string *, tStr, PIKE_T_STRING, reason) 
) 
 
#undef DECLARE_ERROR 
#undef ERR_INHERIT 
#undef ERR_VAR 
#undef EMPTY 
#undef ERR_FUNC 
 
#undef ERR_DECLARE 
#undef ERR_EXT_DECLARE 
#undef ERR_SETUP 
#undef ERR_CLEANUP