146 lines
4.6 KiB
C
146 lines
4.6 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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* Author: Ceriel J.H. Jacobs
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*/
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/* I D E N T I F I E R D E S C R I P T O R S T R U C T U R E */
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/* $Header$ */
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struct module {
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struct node *mo_priority;/* priority of a module */
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struct scopelist *mo_vis;/* scope of this module */
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struct node *mo_body; /* body of this module */
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#define mod_priority df_value.df_module.mo_priority
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#define mod_vis df_value.df_module.mo_vis
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#define mod_body df_value.df_module.mo_body
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};
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struct variable {
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arith va_off; /* address or offset of variable */
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char *va_name; /* name of variable if given */
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#define var_off df_value.df_variable.va_off
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#define var_name df_value.df_variable.va_name
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};
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struct constant {
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struct token co_const; /* result of a constant expression */
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#define con_const df_value.df_constant.co_const
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};
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struct enumval {
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arith en_val; /* value of this enumeration literal */
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struct def *en_next; /* next enumeration literal */
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#define enm_val df_value.df_enum.en_val
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#define enm_next df_value.df_enum.en_next
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};
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struct field {
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arith fd_off;
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struct variant {
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struct caselabellist *v_cases;
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label v_casedescr;
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struct def *v_varianttag;
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} *fd_variant;
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#define fld_off df_value.df_field.fd_off
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#define fld_variant df_value.df_field.fd_variant
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};
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struct dfproc {
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struct scopelist *pr_vis; /* scope of procedure */
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struct node *pr_body; /* body of this procedure */
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#define prc_vis df_value.df_proc.pr_vis
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#define prc_body df_value.df_proc.pr_body
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};
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struct import {
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struct def *im_def; /* imported definition */
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#define imp_def df_value.df_import.im_def
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};
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struct dforward {
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struct scopelist *fo_vis;
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struct node *fo_node;
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char *fo_name;
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#define for_node df_value.df_forward.fo_node
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#define for_vis df_value.df_forward.fo_vis
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#define for_name df_value.df_forward.fo_name
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};
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struct forwtype {
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struct node *f_node;
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#define df_forw_node df_value.df_fortype.f_node
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};
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struct def { /* list of definitions for a name */
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struct def *df_next; /* next definition in definitions chain */
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struct def *df_nextinscope;
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/* link all definitions in a scope */
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struct idf *df_idf; /* link back to the name */
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struct scope *df_scope; /* scope in which this definition resides */
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unsigned short df_kind; /* the kind of this definition: */
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#define D_MODULE 0x0001 /* a module */
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#define D_PROCEDURE 0x0002 /* procedure of function */
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#define D_VARIABLE 0x0004 /* a variable */
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#define D_FIELD 0x0008 /* a field in a record */
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#define D_TYPE 0x0010 /* a type */
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#define D_ENUM 0x0020 /* an enumeration literal */
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#define D_CONST 0x0040 /* a constant */
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#define D_IMPORT 0x0080 /* an imported definition */
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#define D_PROCHEAD 0x0100 /* a procedure heading in a definition module */
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#define D_HIDDEN 0x0200 /* a hidden type */
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#define D_FORWARD 0x0400 /* not yet defined */
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#define D_FORWMODULE 0x0800 /* module must be declared later */
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#define D_FORWTYPE 0x1000 /* forward type */
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#define D_FTYPE 0x2000 /* resolved forward type */
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#define D_ERROR 0x4000 /* a compiler generated definition for an
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undefined variable
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*/
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#define D_INUSE 0x8000 /* identification in this scope (like D_IMPORT)
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*/
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#define D_VALUE (D_PROCEDURE|D_VARIABLE|D_FIELD|D_ENUM|D_CONST|D_PROCHEAD)
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#define D_ISTYPE (D_HIDDEN|D_TYPE|D_FTYPE)
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#define D_IMPORTED (D_IMPORT|D_INUSE)
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#define is_type(dfx) ((dfx)->df_kind & D_ISTYPE)
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unsigned short df_flags;
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#define D_NOREG 0x01 /* set if it may not reside in a register */
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#define D_USED 0x02 /* set if used */
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#define D_DEFINED 0x04 /* set if it is assigned a value */
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#define D_VARPAR 0x08 /* set if it is a VAR parameter */
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#define D_VALPAR 0x10 /* set if it is a value parameter */
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#define D_EXPORTED 0x20 /* set if exported */
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#define D_QEXPORTED 0x40 /* set if qualified exported */
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#define D_BUSY 0x80 /* set if busy reading this definition module */
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#define D_FOREIGN 0x100 /* set for foreign language modules */
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#define D_ADDRGIVEN 0x200 /* set if address given for variable */
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#define D_FORLOOP 0x400 /* set if busy in for-loop */
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#define D_IMP_BY_EXP 0x800 /* imported definition by export */
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struct type *df_type;
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union {
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struct module df_module;
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struct variable df_variable;
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struct constant df_constant;
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struct enumval df_enum;
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struct field df_field;
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struct import df_import;
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struct dfproc df_proc;
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struct dforward df_forward;
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struct forwtype df_fortype;
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int df_stdname; /* define for standard name */
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} df_value;
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};
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typedef struct def t_def;
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/* ALLOCDEF "def" 50 */
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extern t_def
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*define(),
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*DefineLocalModule(),
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*MkDef(),
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*DeclProc(),
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*lookup(),
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*lookfor();
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#define NULLDEF ((t_def *) 0)
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