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wine/tools/widl/parser.y

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%{
/*
* IDL Compiler
*
* Copyright 2002 Ove Kaaven
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include <string.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include "widl.h"
#include "utils.h"
#include "parser.h"
#include "header.h"
#include "proxy.h"
#include "typelib.h"
#if defined(YYBYACC)
/* Berkeley yacc (byacc) doesn't seem to know about these */
/* Some *BSD supplied versions do define these though */
# ifndef YYEMPTY
# define YYEMPTY (-1) /* Empty lookahead value of yychar */
# endif
# ifndef YYLEX
# define YYLEX yylex()
# endif
#elif defined(YYBISON)
/* Bison was used for original development */
/* #define YYEMPTY -2 */
/* #define YYLEX yylex() */
#else
/* No yacc we know yet */
# if !defined(YYEMPTY) || !defined(YYLEX)
# error Yacc version/type unknown. This version needs to be verified for settings of YYEMPTY and YYLEX.
# elif defined(__GNUC__) /* gcc defines the #warning directive */
# warning Yacc version/type unknown. It defines YYEMPTY and YYLEX, but is not tested
/* #else we just take a chance that it works... */
# endif
#endif
static attr_t *make_attr(enum attr_type type);
static attr_t *make_attrv(enum attr_type type, unsigned long val);
static attr_t *make_attrp(enum attr_type type, void *val);
static expr_t *make_expr(enum expr_type type);
static expr_t *make_exprl(enum expr_type type, long val);
static expr_t *make_exprs(enum expr_type type, char *val);
static expr_t *make_exprt(enum expr_type type, typeref_t *tref, expr_t *expr);
static expr_t *make_expr1(enum expr_type type, expr_t *expr);
static expr_t *make_expr2(enum expr_type type, expr_t *exp1, expr_t *exp2);
static expr_t *make_expr3(enum expr_type type, expr_t *expr1, expr_t *expr2, expr_t *expr3);
static type_t *make_type(unsigned char type, type_t *ref);
static typeref_t *make_tref(char *name, type_t *ref);
static typeref_t *uniq_tref(typeref_t *ref);
static type_t *type_ref(typeref_t *ref);
static void set_type(var_t *v, typeref_t *ref, expr_t *arr);
static ifref_t *make_ifref(type_t *iface);
static var_t *make_var(char *name);
static func_t *make_func(var_t *def, var_t *args);
static class_t *make_class(char *name);
static type_t *reg_type(type_t *type, char *name, int t);
static type_t *reg_types(type_t *type, var_t *names, int t);
static type_t *find_type(char *name, int t);
static type_t *find_type2(char *name, int t);
static type_t *get_type(unsigned char type, char *name, int t);
static type_t *get_typev(unsigned char type, var_t *name, int t);
static var_t *reg_const(var_t *var);
static var_t *find_const(char *name, int f);
#define tsENUM 1
#define tsSTRUCT 2
#define tsUNION 3
static type_t std_bool = { "boolean" };
static type_t std_int = { "int" };
static type_t std_int64 = { "__int64" };
static type_t std_uhyper = { "MIDL_uhyper" };
%}
%union {
attr_t *attr;
expr_t *expr;
type_t *type;
typeref_t *tref;
var_t *var;
func_t *func;
ifref_t *ifref;
class_t *clas;
char *str;
UUID *uuid;
unsigned int num;
}
%token <str> aIDENTIFIER
%token <str> aKNOWNTYPE
%token <num> aNUM aHEXNUM
%token <str> aSTRING
%token <uuid> aUUID
%token aEOF
%token SHL SHR
%token tAGGREGATABLE tALLOCATE tAPPOBJECT tARRAYS tASYNC tASYNCUUID
%token tAUTOHANDLE tBINDABLE tBOOLEAN tBROADCAST tBYTE tBYTECOUNT
%token tCALLAS tCALLBACK tCASE tCDECL tCHAR tCOCLASS tCODE tCOMMSTATUS
%token tCONST tCONTEXTHANDLE tCONTEXTHANDLENOSERIALIZE
%token tCONTEXTHANDLESERIALIZE tCONTROL tCPPQUOTE
%token tDEFAULT
%token tDISPINTERFACE
%token tDLLNAME tDOUBLE tDUAL
%token tENDPOINT
%token tENTRY tENUM tERRORSTATUST
%token tEXTERN
%token tFLOAT
%token tHANDLE
%token tHANDLET
%token tHELPSTRING
%token tHYPER tID tIDEMPOTENT
%token tIIDIS
%token tIMPORT tIMPORTLIB
%token tIN tINCLUDE tINLINE
%token tINPUTSYNC
%token tINT tINT64
%token tINTERFACE
%token tLENGTHIS tLIBRARY
%token tLOCAL
%token tLONG
%token tMETHODS
%token tMODULE
%token tOBJECT tODL tOLEAUTOMATION
%token tOUT
%token tPOINTERDEFAULT
%token tPROPERTIES
%token tPUBLIC
%token tREADONLY tREF
%token tRETVAL
%token tSHORT
%token tSIGNED
%token tSIZEIS tSIZEOF
%token tSOURCE
%token tSTDCALL
%token tSTRING tSTRUCT
%token tSWITCH tSWITCHIS tSWITCHTYPE
%token tTRANSMITAS
%token tTYPEDEF
%token tUNION
%token tUNIQUE
%token tUNSIGNED
%token tUUID
%token tV1ENUM
%token tVERSION
%token tVOID
%token tWCHAR tWIREMARSHAL
/* used in attr_t */
%token tPOINTERTYPE
%type <attr> m_attributes attributes attrib_list attribute
%type <expr> m_exprs /* exprs expr_list */ m_expr expr expr_list_const expr_const
%type <expr> array array_list
%type <type> inherit interface interfacehdr interfacedef interfacedec
%type <type> dispinterface dispinterfacehdr dispinterfacedef
%type <type> module modulehdr moduledef
%type <type> base_type int_std
%type <type> enumdef structdef typedef uniondef
%type <ifref> gbl_statements coclass_ints coclass_int
%type <tref> type
%type <var> m_args no_args args arg
%type <var> fields field s_field cases case enums enum_list enum constdef externdef
%type <var> m_ident t_ident ident p_ident pident pident_list
%type <var> dispint_props
%type <func> funcdef int_statements
%type <func> dispint_meths
%type <clas> coclass coclasshdr coclassdef
%type <num> pointer_type version
%type <str> libraryhdr
%left ','
%left '|'
%left '&'
%left '-' '+'
%left '*' '/'
%left SHL SHR
%right '~'
%right CAST
%right PPTR
%right NEG
%%
input: gbl_statements { write_proxies($1); }
;
gbl_statements: { $$ = NULL; }
| gbl_statements interfacedec { $$ = $1; }
| gbl_statements interfacedef { $$ = make_ifref($2); LINK($$, $1); }
| gbl_statements coclassdef { $$ = $1; add_coclass($2); }
| gbl_statements moduledef { $$ = $1; add_module($2); }
| gbl_statements librarydef { $$ = $1; }
| gbl_statements statement { $$ = $1; }
;
imp_statements: {}
| imp_statements interfacedec { if (!parse_only) add_interface($2); }
| imp_statements interfacedef { if (!parse_only) add_interface($2); }
| imp_statements coclassdef { if (!parse_only) add_coclass($2); }
| imp_statements moduledef { if (!parse_only) add_module($2); }
| imp_statements statement {}
;
int_statements: { $$ = NULL; }
| int_statements funcdef ';' { $$ = $2; LINK($$, $1); }
| int_statements statement { $$ = $1; }
;
statement: ';' {}
| constdef ';' { if (!parse_only) { write_constdef($1); } }
| cppquote {}
| enumdef ';' { if (!parse_only) { write_type(header, $1, NULL, NULL); fprintf(header, ";\n\n"); } }
| externdef ';' { if (!parse_only) { write_externdef($1); } }
| import {}
| structdef ';' { if (!parse_only) { write_type(header, $1, NULL, NULL); fprintf(header, ";\n\n"); } }
| typedef ';' {}
| uniondef ';' { if (!parse_only) { write_type(header, $1, NULL, NULL); fprintf(header, ";\n\n"); } }
;
cppquote: tCPPQUOTE '(' aSTRING ')' { if (!parse_only) fprintf(header, "%s\n", $3); }
;
import_start: tIMPORT aSTRING ';' { assert(yychar == YYEMPTY);
if (!do_import($2)) yychar = aEOF; }
;
import: import_start imp_statements aEOF {}
;
libraryhdr: tLIBRARY aIDENTIFIER { $$ = $2; }
;
library_start: attributes libraryhdr '{' { start_typelib($2, $1); }
;
librarydef: library_start imp_statements '}' { end_typelib(); }
;
m_args: { $$ = NULL; }
| args
;
no_args: tVOID { $$ = NULL; }
;
args: arg
| args ',' arg { LINK($3, $1); $$ = $3; }
| no_args
;
/* split into two rules to get bison to resolve a tVOID conflict */
arg: attributes type pident array { $$ = $3;
set_type($$, $2, $4);
$$->attrs = $1;
}
| type pident array { $$ = $2;
set_type($$, $1, $3);
}
| attributes type pident '(' m_args ')' { $$ = $3;
$$->ptr_level--;
set_type($$, $2, NULL);
$$->attrs = $1;
$$->args = $5;
}
| type pident '(' m_args ')' { $$ = $2;
$$->ptr_level--;
set_type($$, $1, NULL);
$$->args = $4;
}
;
array: { $$ = NULL; }
| '[' array_list ']' { $$ = $2; }
| '[' '*' ']' { $$ = make_expr(EXPR_VOID); }
;
array_list: m_expr /* size of first dimension is optional */
| array_list ',' expr { LINK($3, $1); $$ = $3; }
| array_list ']' '[' expr { LINK($4, $1); $$ = $4; }
;
m_attributes: { $$ = NULL; }
| attributes
;
attributes:
'[' attrib_list ']' { $$ = $2; }
;
attrib_list: attribute
| attrib_list ',' attribute { LINK($3, $1); $$ = $3; }
| attrib_list ']' '[' attribute { LINK($4, $1); $$ = $4; }
;
attribute:
tASYNC { $$ = make_attr(ATTR_ASYNC); }
| tCALLAS '(' ident ')' { $$ = make_attrp(ATTR_CALLAS, $3); }
| tCASE '(' expr_list_const ')' { $$ = make_attrp(ATTR_CASE, $3); }
| tCONTEXTHANDLE { $$ = make_attrv(ATTR_CONTEXTHANDLE, 0); }
| tCONTEXTHANDLENOSERIALIZE { $$ = make_attrv(ATTR_CONTEXTHANDLE, 0); /* RPC_CONTEXT_HANDLE_DONT_SERIALIZE */ }
| tCONTEXTHANDLESERIALIZE { $$ = make_attrv(ATTR_CONTEXTHANDLE, 0); /* RPC_CONTEXT_HANDLE_SERIALIZE */ }
| tDEFAULT { $$ = make_attr(ATTR_DEFAULT); }
| tDLLNAME '(' aSTRING ')' { $$ = make_attrp(ATTR_DLLNAME, $3); }
| tDUAL { $$ = make_attr(ATTR_DUAL); }
| tENDPOINT '(' aSTRING ')' { $$ = make_attrp(ATTR_ENDPOINT, $3); }
| tENTRY '(' aSTRING ')' { $$ = make_attrp(ATTR_ENTRY_STRING, $3); }
| tENTRY '(' expr_const ')' { $$ = make_attrp(ATTR_ENTRY_ORDINAL, $3); }
| tHANDLE { $$ = make_attr(ATTR_HANDLE); }
| tHELPSTRING '(' aSTRING ')' { $$ = make_attrp(ATTR_HELPSTRING, $3); }
| tID '(' expr_const ')' { $$ = make_attrp(ATTR_ID, $3); }
| tIDEMPOTENT { $$ = make_attr(ATTR_IDEMPOTENT); }
| tIIDIS '(' ident ')' { $$ = make_attrp(ATTR_IIDIS, $3); }
| tIN { $$ = make_attr(ATTR_IN); }
| tINPUTSYNC { $$ = make_attr(ATTR_INPUTSYNC); }
| tLENGTHIS '(' m_exprs ')' { $$ = make_attrp(ATTR_LENGTHIS, $3); }
| tLOCAL { $$ = make_attr(ATTR_LOCAL); }
| tOBJECT { $$ = make_attr(ATTR_OBJECT); }
| tODL { $$ = make_attr(ATTR_ODL); }
| tOLEAUTOMATION { $$ = make_attr(ATTR_OLEAUTOMATION); }
| tOUT { $$ = make_attr(ATTR_OUT); }
| tPOINTERDEFAULT '(' pointer_type ')' { $$ = make_attrv(ATTR_POINTERDEFAULT, $3); }
| tPUBLIC { $$ = make_attr(ATTR_PUBLIC); }
| tREADONLY { $$ = make_attr(ATTR_READONLY); }
| tRETVAL { $$ = make_attr(ATTR_RETVAL); }
| tSIZEIS '(' m_exprs ')' { $$ = make_attrp(ATTR_SIZEIS, $3); }
| tSOURCE { $$ = make_attr(ATTR_SOURCE); }
| tSTRING { $$ = make_attr(ATTR_STRING); }
| tSWITCHIS '(' expr ')' { $$ = make_attrp(ATTR_SWITCHIS, $3); }
| tSWITCHTYPE '(' type ')' { $$ = make_attrp(ATTR_SWITCHTYPE, type_ref($3)); }
| tTRANSMITAS '(' type ')' { $$ = make_attrp(ATTR_TRANSMITAS, type_ref($3)); }
| tUUID '(' aUUID ')' { $$ = make_attrp(ATTR_UUID, $3); }
| tV1ENUM { $$ = make_attr(ATTR_V1ENUM); }
| tVERSION '(' version ')' { $$ = make_attrv(ATTR_VERSION, $3); }
| tWIREMARSHAL '(' type ')' { $$ = make_attrp(ATTR_WIREMARSHAL, type_ref($3)); }
| pointer_type { $$ = make_attrv(ATTR_POINTERTYPE, $1); }
;
callconv:
| tSTDCALL
;
cases: { $$ = NULL; }
| cases case { if ($2) { LINK($2, $1); $$ = $2; }
else { $$ = $1; }
}
;
case: tCASE expr ':' field { attr_t *a = make_attrp(ATTR_CASE, $2);
$$ = $4; if (!$$) $$ = make_var(NULL);
LINK(a, $$->attrs); $$->attrs = a;
}
| tDEFAULT ':' field { attr_t *a = make_attr(ATTR_DEFAULT);
$$ = $3; if (!$$) $$ = make_var(NULL);
LINK(a, $$->attrs); $$->attrs = a;
}
;
constdef: tCONST type ident '=' expr_const { $$ = reg_const($3);
set_type($$, $2, NULL);
$$->eval = $5;
$$->lval = $5->cval;
}
;
enums: { $$ = NULL; }
| enum_list ',' { $$ = $1; }
| enum_list
;
enum_list: enum
| enum_list ',' enum { LINK($3, $1); $$ = $3;
if ($1 && !$3->eval)
$3->lval = $1->lval + 1;
}
;
enum: ident '=' expr_const { $$ = reg_const($1);
$$->eval = $3;
$$->lval = $3->cval;
}
| ident { $$ = reg_const($1);
$$->lval = 0; /* default for first enum entry */
}
;
enumdef: tENUM t_ident '{' enums '}' { $$ = get_typev(RPC_FC_ENUM16, $2, tsENUM);
$$->fields = $4;
$$->defined = TRUE;
}
;
m_exprs: m_expr
| m_exprs ',' m_expr { LINK($3, $1); $$ = $3; }
;
/*
exprs: { $$ = make_expr(EXPR_VOID); }
| expr_list
;
expr_list: expr
| expr_list ',' expr { LINK($3, $1); $$ = $3; }
;
*/
m_expr: { $$ = make_expr(EXPR_VOID); }
| expr
;
expr: aNUM { $$ = make_exprl(EXPR_NUM, $1); }
| aHEXNUM { $$ = make_exprl(EXPR_HEXNUM, $1); }
| aIDENTIFIER { $$ = make_exprs(EXPR_IDENTIFIER, $1); }
| expr '?' expr ':' expr { $$ = make_expr3(EXPR_COND, $1, $3, $5); }
| expr '|' expr { $$ = make_expr2(EXPR_OR , $1, $3); }
| expr '&' expr { $$ = make_expr2(EXPR_AND, $1, $3); }
| expr '+' expr { $$ = make_expr2(EXPR_ADD, $1, $3); }
| expr '-' expr { $$ = make_expr2(EXPR_SUB, $1, $3); }
| expr '*' expr { $$ = make_expr2(EXPR_MUL, $1, $3); }
| expr '/' expr { $$ = make_expr2(EXPR_DIV, $1, $3); }
| expr SHL expr { $$ = make_expr2(EXPR_SHL, $1, $3); }
| expr SHR expr { $$ = make_expr2(EXPR_SHR, $1, $3); }
| '~' expr { $$ = make_expr1(EXPR_NOT, $2); }
| '-' expr %prec NEG { $$ = make_expr1(EXPR_NEG, $2); }
| '*' expr %prec PPTR { $$ = make_expr1(EXPR_PPTR, $2); }
| '(' type ')' expr %prec CAST { $$ = make_exprt(EXPR_CAST, $2, $4); }
| tSIZEOF '(' type ')' { $$ = make_exprt(EXPR_SIZEOF, $3, NULL); }
| '(' expr ')' { $$ = $2; }
;
expr_list_const: expr_const
| expr_list_const ',' expr_const { LINK($3, $1); $$ = $3; }
;
expr_const: expr { $$ = $1;
if (!$$->is_const) yyerror("expression is not constant\n");
}
;
externdef: tEXTERN tCONST type ident { $$ = $4;
set_type($$, $3, NULL);
}
;
fields: { $$ = NULL; }
| fields field { if ($2) { LINK($2, $1); $$ = $2; }
else { $$ = $1; }
}
;
field: s_field ';' { $$ = $1; }
| m_attributes uniondef ';' { $$ = make_var(NULL); $$->type = $2; $$->attrs = $1; }
| attributes ';' { $$ = make_var(NULL); $$->attrs = $1; }
| ';' { $$ = NULL; }
;
s_field: m_attributes type pident array { $$ = $3; set_type($$, $2, $4); $$->attrs = $1; }
;
funcdef:
m_attributes type callconv pident
'(' m_args ')' { set_type($4, $2, NULL);
$4->attrs = $1;
$$ = make_func($4, $6);
}
;
m_ident: { $$ = NULL; }
| ident
;
t_ident: { $$ = NULL; }
| aIDENTIFIER { $$ = make_var($1); }
| aKNOWNTYPE { $$ = make_var($1); }
;
ident: aIDENTIFIER { $$ = make_var($1); }
/* some "reserved words" used in attributes are also used as field names in some MS IDL files */
| tID { $$ = make_var($<str>1); }
| tRETVAL { $$ = make_var($<str>1); }
| tVERSION { $$ = make_var($<str>1); }
;
base_type: tBYTE { $$ = make_type(RPC_FC_BYTE, NULL); }
| tWCHAR { $$ = make_type(RPC_FC_WCHAR, NULL); }
| int_std
| tSIGNED int_std { $$ = $2; $$->sign = 1; }
| tUNSIGNED int_std { $$ = $2; $$->sign = -1;
switch ($$->type) {
case RPC_FC_SMALL: $$->type = RPC_FC_USMALL; break;
case RPC_FC_SHORT: $$->type = RPC_FC_USHORT; break;
case RPC_FC_LONG: $$->type = RPC_FC_ULONG; break;
case RPC_FC_HYPER:
if (!$$->ref) { $$->ref = &std_uhyper; $$->sign = 0; }
break;
default: break;
}
}
| tFLOAT { $$ = make_type(RPC_FC_FLOAT, NULL); }
| tDOUBLE { $$ = make_type(RPC_FC_DOUBLE, NULL); }
| tBOOLEAN { $$ = make_type(RPC_FC_BYTE, &std_bool); /* ? */ }
| tERRORSTATUST { $$ = make_type(RPC_FC_ERROR_STATUS_T, NULL); }
| tHANDLET { $$ = make_type(RPC_FC_BIND_PRIMITIVE, NULL); /* ? */ }
;
m_int:
| tINT
;
int_std: tINT { $$ = make_type(RPC_FC_LONG, &std_int); } /* win32 only */
| tSHORT m_int { $$ = make_type(RPC_FC_SHORT, NULL); }
| tLONG m_int { $$ = make_type(RPC_FC_LONG, NULL); }
| tHYPER m_int { $$ = make_type(RPC_FC_HYPER, NULL); }
| tINT64 { $$ = make_type(RPC_FC_HYPER, &std_int64); }
| tCHAR { $$ = make_type(RPC_FC_CHAR, NULL); }
;
coclass: tCOCLASS aIDENTIFIER { $$ = make_class($2); }
| tCOCLASS aKNOWNTYPE { $$ = make_class($2); }
;
coclasshdr: attributes coclass { $$ = $2;
$$->attrs = $1;
}
;
coclassdef: coclasshdr '{' coclass_ints '}' { $$ = $1;
$$->ifaces = $3;
}
;
coclass_ints: { $$ = NULL; }
| coclass_ints coclass_int { LINK($2, $1); $$ = $2; }
;
coclass_int:
m_attributes interfacedec { $$ = make_ifref($2); $$->attrs = $1; }
;
dispinterface: tDISPINTERFACE aIDENTIFIER { $$ = get_type(0, $2, 0); }
| tDISPINTERFACE aKNOWNTYPE { $$ = get_type(0, $2, 0); }
;
dispinterfacehdr: attributes dispinterface { $$ = $2;
if ($$->defined) yyerror("multiple definition error\n");
$$->attrs = $1;
/* $$->attrs = make_attr(ATTR_DISPINTERFACE); */
/* LINK($$->attrs, $1); */
$$->ref = find_type("IDispatch", 0);
if (!$$->ref) yyerror("IDispatch is undefined\n");
$$->defined = TRUE;
if (!parse_only) write_forward($$);
}
;
dispint_props: tPROPERTIES ':' { $$ = NULL; }
| dispint_props s_field ';' { LINK($2, $1); $$ = $2; }
;
dispint_meths: tMETHODS ':' { $$ = NULL; }
| dispint_meths funcdef ';' { LINK($2, $1); $$ = $2; }
;
dispinterfacedef: dispinterfacehdr '{'
dispint_props
dispint_meths
'}' { $$ = $1;
$$->fields = $3;
$$->funcs = $4;
if (!parse_only) write_interface($$);
}
/* FIXME: not sure how to handle this yet
| dispinterfacehdr '{' interface '}' { $$ = $1;
if (!parse_only) write_interface($$);
}
*/
;
inherit: { $$ = NULL; }
| ':' aKNOWNTYPE { $$ = find_type2($2, 0); }
;
interface: tINTERFACE aIDENTIFIER { $$ = get_type(RPC_FC_IP, $2, 0); }
| tINTERFACE aKNOWNTYPE { $$ = get_type(RPC_FC_IP, $2, 0); }
;
interfacehdr: attributes interface { $$ = $2;
if ($$->defined) yyerror("multiple definition error\n");
$$->attrs = $1;
$$->defined = TRUE;
if (!parse_only) write_forward($$);
}
;
interfacedef: interfacehdr inherit
'{' int_statements '}' { $$ = $1;
$$->ref = $2;
$$->funcs = $4;
if (!parse_only) write_interface($$);
}
/* MIDL is able to import the definition of a base class from inside the
* definition of a derived class, I'll try to support it with this rule */
| interfacehdr ':' aIDENTIFIER
'{' import int_statements '}' { $$ = $1;
$$->ref = find_type2($3, 0);
if (!$$->ref) yyerror("base class %s not found in import\n", $3);
$$->funcs = $6;
if (!parse_only) write_interface($$);
}
| dispinterfacedef { $$ = $1; }
;
interfacedec:
interface ';' { $$ = $1; if (!parse_only) write_forward($$); }
| dispinterface ';' { $$ = $1; if (!parse_only) write_forward($$); }
;
module: tMODULE aIDENTIFIER { $$ = make_type(0, NULL); $$->name = $2; }
| tMODULE aKNOWNTYPE { $$ = make_type(0, NULL); $$->name = $2; }
;
modulehdr: attributes module { $$ = $2;
$$->attrs = $1;
}
;
moduledef: modulehdr '{' int_statements '}' { $$ = $1;
$$->funcs = $3;
/* FIXME: if (!parse_only) write_module($$); */
}
;
p_ident: '*' pident %prec PPTR { $$ = $2; $$->ptr_level++; }
| tCONST p_ident { $$ = $2; /* FIXME */ }
;
pident: ident
| p_ident
| '(' pident ')' { $$ = $2; }
;
pident_list:
pident
| pident_list ',' pident { LINK($3, $1); $$ = $3; }
;
pointer_type:
tREF { $$ = RPC_FC_RP; }
| tUNIQUE { $$ = RPC_FC_UP; }
;
structdef: tSTRUCT t_ident '{' fields '}' { $$ = get_typev(RPC_FC_STRUCT, $2, tsSTRUCT);
$$->fields = $4;
$$->defined = TRUE;
}
;
type: tVOID { $$ = make_tref(NULL, make_type(0, NULL)); }
| aKNOWNTYPE { $$ = make_tref($1, find_type($1, 0)); }
| base_type { $$ = make_tref(NULL, $1); }
| tCONST type { $$ = uniq_tref($2); $$->ref->is_const = TRUE; }
| enumdef { $$ = make_tref(NULL, $1); }
| tENUM aIDENTIFIER { $$ = make_tref(NULL, find_type2($2, tsENUM)); }
| structdef { $$ = make_tref(NULL, $1); }
| tSTRUCT aIDENTIFIER { $$ = make_tref(NULL, get_type(RPC_FC_STRUCT, $2, tsSTRUCT)); }
| uniondef { $$ = make_tref(NULL, $1); }
| tUNION aIDENTIFIER { $$ = make_tref(NULL, find_type2($2, tsUNION)); }
;
typedef: tTYPEDEF m_attributes type pident_list { typeref_t *tref = uniq_tref($3);
$4->tname = tref->name;
tref->name = NULL;
$$ = type_ref(tref);
$$->attrs = $2;
if (!parse_only) write_typedef($$, $4);
reg_types($$, $4, 0);
}
;
uniondef: tUNION t_ident '{' fields '}' { $$ = get_typev(RPC_FC_NON_ENCAPSULATED_UNION, $2, tsUNION);
$$->fields = $4;
$$->defined = TRUE;
}
| tUNION t_ident
tSWITCH '(' s_field ')'
m_ident '{' cases '}' { var_t *u = $7;
$$ = get_typev(RPC_FC_ENCAPSULATED_UNION, $2, tsUNION);
if (!u) u = make_var("tagged_union");
u->type = make_type(RPC_FC_NON_ENCAPSULATED_UNION, NULL);
u->type->fields = $9;
u->type->defined = TRUE;
LINK(u, $5); $$->fields = u;
$$->defined = TRUE;
}
;
version:
aNUM { $$ = MAKELONG($1, 0); }
| aNUM '.' aNUM { $$ = MAKELONG($1, $3); }
;
%%
static attr_t *make_attr(enum attr_type type)
{
attr_t *a = xmalloc(sizeof(attr_t));
a->type = type;
a->u.ival = 0;
INIT_LINK(a);
return a;
}
static attr_t *make_attrv(enum attr_type type, unsigned long val)
{
attr_t *a = xmalloc(sizeof(attr_t));
a->type = type;
a->u.ival = val;
INIT_LINK(a);
return a;
}
static attr_t *make_attrp(enum attr_type type, void *val)
{
attr_t *a = xmalloc(sizeof(attr_t));
a->type = type;
a->u.pval = val;
INIT_LINK(a);
return a;
}
static expr_t *make_expr(enum expr_type type)
{
expr_t *e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = NULL;
e->u.lval = 0;
e->is_const = FALSE;
INIT_LINK(e);
return e;
}
static expr_t *make_exprl(enum expr_type type, long val)
{
expr_t *e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = NULL;
e->u.lval = val;
e->is_const = FALSE;
INIT_LINK(e);
/* check for numeric constant */
if (type == EXPR_NUM || type == EXPR_HEXNUM) {
e->is_const = TRUE;
e->cval = val;
}
return e;
}
static expr_t *make_exprs(enum expr_type type, char *val)
{
expr_t *e;
e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = NULL;
e->u.sval = val;
e->is_const = FALSE;
INIT_LINK(e);
/* check for predefined constants */
if (type == EXPR_IDENTIFIER) {
var_t *c = find_const(val, 0);
if (c) {
e->u.sval = c->name;
free(val);
e->is_const = TRUE;
e->cval = c->lval;
}
}
return e;
}
static expr_t *make_exprt(enum expr_type type, typeref_t *tref, expr_t *expr)
{
expr_t *e;
e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = expr;
e->u.tref = tref;
e->is_const = FALSE;
INIT_LINK(e);
/* check for cast of constant expression */
if (type == EXPR_CAST && expr->is_const) {
e->is_const = TRUE;
e->cval = expr->cval;
}
return e;
}
static expr_t *make_expr1(enum expr_type type, expr_t *expr)
{
expr_t *e;
e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = expr;
e->u.lval = 0;
e->is_const = FALSE;
INIT_LINK(e);
/* check for compile-time optimization */
if (expr->is_const) {
e->is_const = TRUE;
switch (type) {
case EXPR_NEG:
e->cval = -expr->cval;
break;
case EXPR_NOT:
e->cval = ~expr->cval;
break;
default:
e->is_const = FALSE;
break;
}
}
return e;
}
static expr_t *make_expr2(enum expr_type type, expr_t *expr1, expr_t *expr2)
{
expr_t *e;
e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = expr1;
e->u.ext = expr2;
e->is_const = FALSE;
INIT_LINK(e);
/* check for compile-time optimization */
if (expr1->is_const && expr2->is_const) {
e->is_const = TRUE;
switch (type) {
case EXPR_ADD:
e->cval = expr1->cval + expr2->cval;
break;
case EXPR_SUB:
e->cval = expr1->cval - expr2->cval;
break;
case EXPR_MUL:
e->cval = expr1->cval * expr2->cval;
break;
case EXPR_DIV:
e->cval = expr1->cval / expr2->cval;
break;
case EXPR_OR:
e->cval = expr1->cval | expr2->cval;
break;
case EXPR_AND:
e->cval = expr1->cval & expr2->cval;
break;
case EXPR_SHL:
e->cval = expr1->cval << expr2->cval;
break;
case EXPR_SHR:
e->cval = expr1->cval >> expr2->cval;
break;
default:
e->is_const = FALSE;
break;
}
}
return e;
}
static expr_t *make_expr3(enum expr_type type, expr_t *expr1, expr_t *expr2, expr_t *expr3)
{
expr_t *e;
e = xmalloc(sizeof(expr_t));
e->type = type;
e->ref = expr1;
e->u.ext = expr2;
e->ext2 = expr3;
e->is_const = FALSE;
INIT_LINK(e);
/* check for compile-time optimization */
if (expr1->is_const && expr2->is_const && expr3->is_const) {
e->is_const = TRUE;
switch (type) {
case EXPR_COND:
e->cval = expr1->cval ? expr2->cval : expr3->cval;
break;
default:
e->is_const = FALSE;
break;
}
}
return e;
}
static type_t *make_type(unsigned char type, type_t *ref)
{
type_t *t = xmalloc(sizeof(type_t));
t->name = NULL;
t->type = type;
t->ref = ref;
t->rname = NULL;
t->attrs = NULL;
t->funcs = NULL;
t->fields = NULL;
t->ignore = parse_only;
t->is_const = FALSE;
t->sign = 0;
t->defined = FALSE;
t->written = FALSE;
INIT_LINK(t);
return t;
}
static typeref_t *make_tref(char *name, type_t *ref)
{
typeref_t *t = xmalloc(sizeof(typeref_t));
t->name = name;
t->ref = ref;
t->uniq = ref ? 0 : 1;
return t;
}
static typeref_t *uniq_tref(typeref_t *ref)
{
typeref_t *t = ref;
type_t *tp;
if (t->uniq) return t;
tp = make_type(0, t->ref);
tp->name = t->name;
t->name = NULL;
t->ref = tp;
t->uniq = 1;
return t;
}
static type_t *type_ref(typeref_t *ref)
{
type_t *t = ref->ref;
if (ref->name) free(ref->name);
free(ref);
return t;
}
static void set_type(var_t *v, typeref_t *ref, expr_t *arr)
{
v->type = ref->ref;
v->tname = ref->name;
ref->name = NULL;
free(ref);
v->array = arr;
}
static ifref_t *make_ifref(type_t *iface)
{
ifref_t *l = xmalloc(sizeof(ifref_t));
l->iface = iface;
l->attrs = NULL;
INIT_LINK(l);
return l;
}
static var_t *make_var(char *name)
{
var_t *v = xmalloc(sizeof(var_t));
v->name = name;
v->ptr_level = 0;
v->type = NULL;
v->tname = NULL;
v->attrs = NULL;
v->array = NULL;
v->eval = NULL;
v->lval = 0;
INIT_LINK(v);
return v;
}
static func_t *make_func(var_t *def, var_t *args)
{
func_t *f = xmalloc(sizeof(func_t));
f->def = def;
f->args = args;
f->ignore = parse_only;
f->idx = -1;
INIT_LINK(f);
return f;
}
static class_t *make_class(char *name)
{
class_t *c = xmalloc(sizeof(class_t));
c->name = name;
c->attrs = NULL;
c->ifaces = NULL;
INIT_LINK(c);
return c;
}
#define HASHMAX 64
static int hash_ident(const char *name)
{
const char *p = name;
int sum = 0;
/* a simple sum hash is probably good enough */
while (*p) {
sum += *p;
p++;
}
return sum & (HASHMAX-1);
}
/***** type repository *****/
struct rtype {
char *name;
type_t *type;
int t;
struct rtype *next;
};
struct rtype *type_hash[HASHMAX];
static type_t *reg_type(type_t *type, char *name, int t)
{
struct rtype *nt;
int hash;
if (!name) {
yyerror("registering named type without name\n");
return type;
}
hash = hash_ident(name);
nt = xmalloc(sizeof(struct rtype));
nt->name = name;
nt->type = type;
nt->t = t;
nt->next = type_hash[hash];
type_hash[hash] = nt;
return type;
}
static type_t *reg_types(type_t *type, var_t *names, int t)
{
type_t *ptr = type;
int ptrc = 0;
while (names) {
var_t *next = NEXT_LINK(names);
if (names->name) {
type_t *cur = ptr;
int cptr = names->ptr_level;
if (cptr > ptrc) {
while (cptr > ptrc) {
cur = ptr = make_type(RPC_FC_FP, cur); /* FIXME: pointer type from attrs? */
ptrc++;
}
} else {
while (cptr < ptrc) {
cur = cur->ref;
cptr++;
}
}
reg_type(cur, names->name, t);
}
free(names);
names = next;
}
return type;
}
static type_t *find_type(char *name, int t)
{
struct rtype *cur = type_hash[hash_ident(name)];
while (cur && (cur->t != t || strcmp(cur->name, name)))
cur = cur->next;
if (!cur) {
yyerror("type %s not found\n", name);
return NULL;
}
return cur->type;
}
static type_t *find_type2(char *name, int t)
{
type_t *tp = find_type(name, t);
free(name);
return tp;
}
int is_type(const char *name)
{
struct rtype *cur = type_hash[hash_ident(name)];
while (cur && (cur->t || strcmp(cur->name, name)))
cur = cur->next;
if (cur) return TRUE;
return FALSE;
}
static type_t *get_type(unsigned char type, char *name, int t)
{
struct rtype *cur = NULL;
type_t *tp;
if (name) {
cur = type_hash[hash_ident(name)];
while (cur && (cur->t != t || strcmp(cur->name, name)))
cur = cur->next;
}
if (cur) {
free(name);
return cur->type;
}
tp = make_type(type, NULL);
tp->name = name;
if (!name) return tp;
return reg_type(tp, name, t);
}
static type_t *get_typev(unsigned char type, var_t *name, int t)
{
char *sname = NULL;
if (name) {
sname = name->name;
free(name);
}
return get_type(type, sname, t);
}
/***** constant repository *****/
struct rconst {
char *name;
var_t *var;
struct rconst *next;
};
struct rconst *const_hash[HASHMAX];
static var_t *reg_const(var_t *var)
{
struct rconst *nc;
int hash;
if (!var->name) {
yyerror("registering constant without name\n");
return var;
}
hash = hash_ident(var->name);
nc = xmalloc(sizeof(struct rconst));
nc->name = var->name;
nc->var = var;
nc->next = const_hash[hash];
const_hash[hash] = nc;
return var;
}
static var_t *find_const(char *name, int f)
{
struct rconst *cur = const_hash[hash_ident(name)];
while (cur && strcmp(cur->name, name))
cur = cur->next;
if (!cur) {
if (f) yyerror("constant %s not found\n", name);
return NULL;
}
return cur->var;
}
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