393 lines
13 KiB
C
393 lines
13 KiB
C
/* $NetBSD: lint1.h,v 1.10 2000/06/14 06:49:23 cgd Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
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* Copyright (c) 1994, 1995 Jochen Pohl
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jochen Pohl for
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* The NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "lint.h"
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#include "op.h"
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/*
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* Describes the position of a declaration or anything else.
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*/
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typedef struct {
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int p_line;
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const char *p_file;
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int p_uniq; /* uniquifier */
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} pos_t;
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/* Copies curr_pos, keeping things unique. */
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#define UNIQUE_CURR_POS(pos) \
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do { \
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STRUCT_ASSIGN((pos), curr_pos); \
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curr_pos.p_uniq++; \
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if (curr_pos.p_file == csrc_pos.p_file) \
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csrc_pos.p_uniq++; \
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} while (0)
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/*
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* Strings cannot be referenced to simply by a pointer to its first
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* char. This is because strings can contain NUL characters other than the
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* trailing NUL.
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*
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* Strings are stored with a trailing NUL.
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*/
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typedef struct strg {
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tspec_t st_tspec; /* CHAR or WCHAR */
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size_t st_len; /* length without trailing NUL */
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union {
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u_char *_st_cp;
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wchar_t *_st_wcp;
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} st_u;
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} strg_t;
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#define st_cp st_u._st_cp
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#define st_wcp st_u._st_wcp
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/*
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* qualifiers (only for lex/yacc interface)
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*/
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typedef enum {
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CONST, VOLATILE
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} tqual_t;
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/*
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* Integer and floating point values are stored in this structure
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*/
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typedef struct {
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tspec_t v_tspec;
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int v_ansiu; /* set if an integer constant is
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unsigned in ANSI C */
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union {
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quad_t _v_quad; /* integers */
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ldbl_t _v_ldbl; /* floats */
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} v_u;
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} val_t;
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#define v_quad v_u._v_quad
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#define v_ldbl v_u._v_ldbl
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/*
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* Structures of type str_t uniqely identify structures. This can't
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* be done in structures of type type_t, because these are copied
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* if they must be modified. So it would not be possible to check
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* if to structures are identical by comparing the pointers to
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* the type structures.
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*
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* The typename is used if the structure is unnamed to identify
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* the structure type in pass 2.
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*/
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typedef struct {
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u_int size; /* size in bit */
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u_int align : 15; /* alignment in bit */
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u_int sincompl : 1; /* set if incomplete type */
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struct sym *memb; /* list of members */
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struct sym *stag; /* symbol table entry of tag */
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struct sym *stdef; /* symbol table entry of first typename */
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} str_t;
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/*
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* same as above for enums
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*/
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typedef struct {
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u_int eincompl : 1; /* incomplete enum type */
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struct sym *elem; /* list of enumerators */
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struct sym *etag; /* symbol table entry of tag */
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struct sym *etdef; /* symbol table entry of first typename */
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} enum_t;
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/*
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* Types are represented by concatenation of structures of type type_t
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* via t_subt.
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*/
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typedef struct type {
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tspec_t t_tspec; /* type specifier */
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u_int t_aincompl : 1; /* incomplete array type */
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u_int t_const : 1; /* const modifier */
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u_int t_volatile : 1; /* volatile modifier */
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u_int t_proto : 1; /* function prototype (t_args valid) */
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u_int t_vararg : 1; /* protoype with ... */
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u_int t_typedef : 1; /* type defined with typedef */
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u_int t_isfield : 1; /* type is bitfield */
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u_int t_isenum : 1; /* type is (or was) enum (t_enum valid) */
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union {
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int _t_dim; /* dimension */
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str_t *_t_str; /* struct/union tag */
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enum_t *_t_enum; /* enum tag */
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struct sym *_t_args; /* arguments (if t_proto) */
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} t_u;
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struct {
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u_int _t_flen : 8; /* length of bit-field */
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u_int _t_foffs : 24; /* offset of bit-field */
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} t_b;
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struct type *t_subt; /* element type (arrays), return value
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(functions), or type pointer points to */
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} type_t;
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#define t_dim t_u._t_dim
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#define t_str t_u._t_str
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#define t_field t_u._t_field
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#define t_enum t_u._t_enum
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#define t_args t_u._t_args
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#define t_flen t_b._t_flen
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#define t_foffs t_b._t_foffs
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/*
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* types of symbols
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*/
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typedef enum {
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FVFT, /* variables, functions, type names, enums */
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FMOS, /* members of structs or unions */
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FTAG, /* tags */
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FLAB /* labels */
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} symt_t;
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/*
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* storage classes
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*/
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typedef enum {
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NOSCL,
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EXTERN, /* external symbols (indep. of decl_t) */
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STATIC, /* static symbols (local and global) */
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AUTO, /* automatic symbols (except register) */
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REG, /* register */
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TYPEDEF, /* typedef */
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STRTAG,
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UNIONTAG,
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ENUMTAG,
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MOS, /* member of struct */
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MOU, /* member of union */
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ENUMCON, /* enumerator */
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ABSTRACT, /* abstract symbol (sizeof, casts, unnamed argument) */
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ARG, /* argument */
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PARG, /* used in declaration stack during prototype
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declaration */
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INLINE /* only used by the parser */
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} scl_t;
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/*
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* symbol table entry
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*/
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typedef struct sym {
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const char *s_name; /* name */
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const char *s_rename; /* renamed symbol's given name */
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pos_t s_dpos; /* position of last (prototype)definition,
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prototypedeclaration, no-prototype-def.,
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tentative definition or declaration,
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in this order */
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pos_t s_spos; /* position of first initialisation */
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pos_t s_upos; /* position of first use */
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symt_t s_kind; /* type of symbol */
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u_int s_keyw : 1; /* keyword */
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u_int s_field : 1; /* bit-field */
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u_int s_set : 1; /* variable set, label defined */
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u_int s_used : 1; /* variable/label used */
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u_int s_arg : 1; /* symbol is function argument */
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u_int s_reg : 1; /* symbol is register variable */
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u_int s_defarg : 1; /* undefined symbol in old style function
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definition */
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u_int s_rimpl : 1; /* return value of function implizit decl. */
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u_int s_osdef : 1; /* symbol stems from old style function def. */
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u_int s_inline : 1; /* true if this is a inline function */
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struct sym *s_xsym; /* for local declared external symbols pointer
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to external symbol with same name */
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def_t s_def; /* declared, tentative defined, defined */
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scl_t s_scl; /* storage class */
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int s_blklev; /* level of declaration, -1 if not in symbol
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table */
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type_t *s_type; /* type */
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val_t s_value; /* value (if enumcon) */
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union {
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str_t *_s_st; /* tag, if it is a struct/union member */
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enum_t *_s_et; /* tag, if it is a enumerator */
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tspec_t _s_tsp; /* type (only for keywords) */
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tqual_t _s_tqu; /* qualifier (only for keywords) */
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struct sym *_s_args; /* arguments in old style function
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definitions */
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} u;
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struct sym *s_link; /* next symbol with same hash value */
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struct sym **s_rlink; /* pointer to s_link of prev. symbol */
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struct sym *s_nxt; /* next struct/union member, enumerator,
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argument */
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struct sym *s_dlnxt; /* next symbol declared on same level */
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} sym_t;
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#define s_styp u._s_st
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#define s_etyp u._s_et
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#define s_tspec u._s_tsp
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#define s_tqual u._s_tqu
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#define s_args u._s_args
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/*
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* Used to keep some informations about symbols before they are entered
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* into the symbol table.
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*/
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typedef struct sbuf {
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const char *sb_name; /* name of symbol */
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size_t sb_len; /* length (without '\0') */
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int sb_hash; /* hash value */
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sym_t *sb_sym; /* symbol table entry */
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struct sbuf *sb_nxt; /* for freelist */
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} sbuf_t;
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/*
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* tree node
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*/
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typedef struct tnode {
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op_t tn_op; /* operator */
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type_t *tn_type; /* type */
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u_int tn_lvalue : 1; /* node is lvalue */
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u_int tn_cast : 1; /* if tn_op == CVT its an explizit cast */
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u_int tn_parn : 1; /* node parenthesized */
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union {
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struct {
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struct tnode *_tn_left; /* (left) operand */
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struct tnode *_tn_right; /* right operand */
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} tn_s;
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sym_t *_tn_sym; /* symbol if op == NAME */
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val_t *_tn_val; /* value if op == CON */
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strg_t *_tn_strg; /* string if op == STRING */
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} tn_u;
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} tnode_t;
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#define tn_left tn_u.tn_s._tn_left
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#define tn_right tn_u.tn_s._tn_right
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#define tn_sym tn_u._tn_sym
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#define tn_val tn_u._tn_val
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#define tn_strg tn_u._tn_strg
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/*
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* For nested declarations a stack exists, which holds all information
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* needed for the current level. dcs points to the top element of this
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* stack.
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*
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* ctx describes the context of the current declaration. Its value is
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* one of
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* EXTERN global declarations
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* MOS oder MOU declarations of struct or union members
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* ENUMCON declarations of enums
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* ARG declaration of arguments in old style function definitions
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* PARG declaration of arguments in function prototypes
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* AUTO declaration of local symbols
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* ABSTRACT abstract declarations (sizeof, casts)
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*
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*/
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typedef struct dinfo {
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tspec_t d_atyp; /* VOID, CHAR, INT, FLOAT or DOUBLE */
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tspec_t d_smod; /* SIGNED or UNSIGN */
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tspec_t d_lmod; /* SHORT, LONG or QUAD */
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scl_t d_scl; /* storage class */
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type_t *d_type; /* after deftyp() pointer to the type used
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for all declarators */
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sym_t *d_rdcsym; /* redeclared symbol */
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int d_offset; /* offset of next structure member */
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int d_stralign; /* alignment required for current structure */
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scl_t d_ctx; /* context of declaration */
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u_int d_const : 1; /* const in declaration specifiers */
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u_int d_volatile : 1; /* volatile in declaration specifiers */
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u_int d_inline : 1; /* inline in declaration specifiers */
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u_int d_mscl : 1; /* multiple storage classes */
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u_int d_terr : 1; /* invalid type combination */
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u_int d_nedecl : 1; /* 1 if at least a tag is declared */
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u_int d_vararg : 1; /* ... in in current function decl. */
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u_int d_proto : 1; /* current funct. decl. is prototype */
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u_int d_notyp : 1; /* set if no type specifier was present */
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u_int d_asm : 1; /* set if d_ctx == AUTO and asm() present */
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type_t *d_tagtyp; /* tag during member declaration */
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sym_t *d_fargs; /* list of arguments during function def. */
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pos_t d_fdpos; /* position of function definition */
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sym_t *d_dlsyms; /* first symbol declared at this level */
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sym_t **d_ldlsym; /* points to s_dlnxt in last symbol decl.
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at this level */
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sym_t *d_fpsyms; /* symbols defined in prototype */
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struct dinfo *d_nxt; /* next level */
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} dinfo_t;
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/*
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* Type of stack which is used for initialisation of aggregate types.
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*/
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typedef struct istk {
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type_t *i_type; /* type of initialisation */
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type_t *i_subt; /* type of next level */
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u_int i_brace : 1; /* need } for pop */
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u_int i_nolimit : 1; /* incomplete array type */
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sym_t *i_mem; /* next structure member */
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int i_cnt; /* # of remaining elements */
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struct istk *i_nxt; /* previous level */
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} istk_t;
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/*
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* Used to collect information about pointers and qualifiers in
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* declarators.
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*/
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typedef struct pqinf {
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int p_pcnt; /* number of asterisks */
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u_int p_const : 1;
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u_int p_volatile : 1;
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struct pqinf *p_nxt;
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} pqinf_t;
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/*
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* Case values are stored in a list of type clst_t.
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*/
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typedef struct clst {
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val_t cl_val;
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struct clst *cl_nxt;
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} clst_t;
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/*
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* Used to keep informations about nested control statements.
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*/
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typedef struct cstk {
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int c_env; /* type of statement (T_IF, ...) */
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u_int c_loop : 1; /* continue && break are valid */
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u_int c_switch : 1; /* case && break are valid */
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u_int c_break : 1; /* loop/switch has break */
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u_int c_cont : 1; /* loop has continue */
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u_int c_default : 1; /* switch has default */
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u_int c_infinite : 1; /* break condition always false
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(for (;;), while (1)) */
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u_int c_rchif : 1; /* end of if-branch reached */
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u_int c_noretval : 1; /* had "return;" */
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u_int c_retval : 1; /* had "return (e);" */
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type_t *c_swtype; /* type of switch expression */
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clst_t *c_clst; /* list of case values */
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struct mbl *c_fexprm; /* saved memory for end of loop
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expression in for() */
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tnode_t *c_f3expr; /* end of loop expr in for() */
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pos_t c_fpos; /* position of end of loop expr */
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pos_t c_cfpos; /* same for csrc_pos */
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struct cstk *c_nxt; /* outer control statement */
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} cstk_t;
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#include "externs1.h"
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