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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _PARSEPROTO_H
#define _PARSEPROTO_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* DECL - parse C type declarations.
*
* 1) Does not understand struct, union or enum definitions.
* 2) Does not understand auto, static, extern or typedef storage class
* specifiers.
* 3) Does not support initialization.
* 4) Does not support type definition.
* 5) Only understands array dimension specified as constant decimal
* integer or identifier.
*
* Supported Operations
*
* decl_Parse convert string to a decl_t.
* decl_Destroy Free space associated with a (previously returned)
* decl_t. The function follows the argument list.
* decl_SetName set identifier.
* decl_GetName return identifier.
* decl_ToString convert a (previously returned) decl_t into a
* printable representation.
* decl_GetArgLength return length of argument list.
* decl_GetNext return the next decl_t associated with the given
* decl_t.
* decl_GetDeclSpec return the declaration specifier.
* decl_GetDSName return identifier associated with a
* declaration specifier.
* decl_GetType return the type_t associated with a decl_t.
* decl_IsVarargs return true if the given decl_t is a varargs function.
* decl_IsFunction return true if the given decl_t is a function.
*
* type_GetNext return the next type_t associated with a given type_t.
* type_IsArray return true if the given type_t is an array.
* type_GetArraySize return size of array.
*
* type_IsPtrTo return true if the given type_t is a pointer to ... .
* type_GetPtrToTypeQual return type qualifiers for a pointer to ... .
*
* type_IsFunction return true if the given type_t is a function.
* type_GetArgLength return length of argument list.
* type_IsVarargs return true if function signature includes ... .
* type_GetArg return the decl_t associated with a given type_t.
* type_IsPtrFun return true if the given type_t is a pointer* to a
* function.
*/
/* Include Files */
#include <stdio.h>
#include <ctype.h>
#include <string.h>
/* Macros and Constants */
#define loop for (;;)
#define STT_isvoid(s) ((s) & (TS_VOID))
#define STT_isfloat(s) ((s) & (TS_FLOAT | TS_DOUBLE))
#define STT_ischar(s) ((s) & (TS_CHAR))
#define STT_isint(s) ((s) & \
(TS_SHORT | TS_INT | TS_LONG | TS_LONGLONG | TS_CHAR))
#define STT_isarith(s) (STT_isfloat(s) || STT_isint(s))
#define STT_isbasic(s) (STT_isarith(s) || STT_isvoid(s))
#define STT_isderived(s) ((s) & (TS_STRUCT | TS_UNION | TS_ENUM | TS_TYPEDEF))
#define STT_has_explicit_sign(s) ((s) & (TS_SIGNED | TS_UNSIGNED))
/* Data Declarations */
/*
* The overall type encoding is thus:
*
* decl_t encodes a declaration which consists of:
* identifier
* declaration specifier (storage class specifier, type specifier,
* type qualifier)
* type modifiers (array, function, pointer to)
* ancillary (varargs?, argument list)
*
* The argument list is an ordered, NULL terminated, linked list.
*
* An empty argument list (== NULL) indicates an unknown argument
* list, i.e. "()".
*
* declaration specifiers are encoded as bits in an enum (stt_t).
*
* type modifiers are encoded as a linked list of variant records,
* i.e. "array of ..."
* "function returning ..." and "pointer to ...".
*
* An empty list of type modifiers (== NULL) indicates a "plain" type.
*
*
* OK, here goes some ASCII art...
*
*
* base object
* |
* |
* V
*
* ---------- ---------- ---------- ----------
* | | | | | | | |
* | decl_t | --> | type_t | --> | type_t | ... | type_t | --> NULL
* | | | | |(DD_FUN)| | |
* ---------- ---------- ---------- ----------
* | |
* | |
* V V
* A ---------- ----------
* NULL r | | | |
* g | decl_t | --> | type_t | ... --> NULL
* u | | | |
* m ---------- ----------
* e |
* n |
* t V
* ----------
* L | |
* i | decl_t | ... --> NULL
* s | |
* t ----------
*
* ...
*
* |
* |
* V
*
* NULL
*/
/*
* The encoding of a declaration specifier is done primarily with an
* stt_t type.
* This type must support bit-wise operations.
*/
typedef enum {
SCS_MASK = 0x000000ff, /* storage class specifiers */
SCS_NONE = 0x00000000,
SCS_REGISTER = 0x00000001,
SCS_TYPEDEF = 0x00000002,
SCS_EXTERN = 0x00000004,
SCS_AUTO = 0x00000008,
SCS_STATIC = 0x00000010,
TS_MASK = 0x00ffff00, /* type specifiers */
TS_NO_TS = 0x00000000,
TS_CHAR = 0x00000100,
TS_SHORT = 0x00000200,
TS_INT = 0x00000400,
TS_LONG = 0x00000800,
TS_SIGNED = 0x00001000,
TS_UNSIGNED = 0x00002000,
TS_ENUM = 0x00004000,
TS_FLOAT = 0x00010000,
TS_DOUBLE = 0x00020000,
TS_STRUCT = 0x00040000,
TS_UNION = 0x00080000,
TS_TYPEDEF = 0x00100000,
TS_VOID = 0x00200000,
TS_LONGLONG = 0x00400000, /* non-ANSI type: long long */
TQ_MASK = 0x0f000000, /* type qualifiers */
TQ_NONE = 0x00000000,
TQ_CONST = 0x01000000,
TQ_VOLATILE = 0x02000000,
TQ_RESTRICT = 0x04000000,
TQ_RESTRICT_KYWD = 0x08000000
} stt_t;
typedef enum { /* declarator options */
DD_NONE = 0,
DD_ARY = 1, /* array of [size] ... */
DD_FUN = 2, /* function [taking and] returning ... */
DD_PTR = 3 /* [tq] pointer to ... */
} decl_type_t;
typedef enum {
DTS_DECL = 0,
DTS_CAST = 1,
DTS_RET = 3
} decl_dts_t;
typedef struct {
stt_t ds_stt; /* scs|ts|tq */
char *ds_id; /* id for struct|union|enum|typedef */
} decl_spec_t;
typedef struct _declarator decl_t;
typedef struct _type {
struct _type *t_next; /* next type_t or NULL */
decl_type_t t_dt; /* oneof DD_* */
/* DD_FUN */
int t_nargs; /* number of arguments */
int t_ellipsis; /* a varargs? */
decl_t *t_args; /* list of arguments */
/* DD_PTR */
stt_t t_stt; /* type qualifier, TQ_* */
/* DD_ARY */
char *t_sizestr; /* size as a string */
} type_t;
struct _declarator {
char *d_name; /* name of declarator */
decl_spec_t *d_ds; /* ts|scs|tq */
type_t *d_type; /* list of attributes or NULL */
int d_ellipsis; /* a varargs? */
decl_t *d_next; /* next link in chain (arglist) */
};
/* External Declarations */
extern char *declspec_ToString(char *, decl_spec_t *);
extern void decl_Destroy(decl_t *);
extern int decl_GetArgLength(decl_t *);
extern decl_t *decl_SetName(decl_t *, char *);
extern char *decl_GetName(decl_t *);
extern type_t *decl_GetType(decl_t *);
extern int decl_IsVarargs(decl_t *dp);
extern char *decl_ToString(char *, decl_dts_t, decl_t *,
const char *);
extern const char *decl_Parse(char *, decl_t **);
extern void decl_GetTraceInfo(decl_t *, char *, char *, decl_t **);
extern char *decl_ToFormal(decl_t *);
extern int type_IsArray(type_t *);
extern int type_IsPtrTo(type_t *);
extern int type_IsFunction(type_t *);
extern int type_IsVarargs(type_t *);
extern int type_IsPtrFun(type_t *);
extern decl_t *decl_AddArgNames(decl_t *);
#ifdef __cplusplus
}
#endif
#endif /* _PARSEPROTO_H */
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