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rb6.par
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rb6.par
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/* -PARSER----------------------------------------------------------------------
RapidBATCH
Copyright (C) 2008, 2009 by Phorward Software Technologies, Jan Max Meyer
http://www.phorward-software.com ++ mail@phorward-software.com
File: rb6.par
Author: Jan Max Meyer
Usage: Parser for the RapidBATCH (Version 6) scripting language core
----------------------------------------------------------------------------- */
#!language "C";
#whitespaces whitespace;
#lexeme value ident
;
// Precedence definitions
#left '|';
#left '&';
#left '=' '!' '>' '<' ">=" "<=";
#left '#';
#left '+' '-';
#left '*' '/' '~';
#default action [* @@ = @1; *];
// Parser description
#parser "RapidBATCH";
#prefix "rb";
#version "6.0";
#copyright "Copyright (C) 2008, 2009 by Phorward Software Technologies, Jan Max Meyer";
#description "";
#language "C";
// Syntactical adjustments
#case insensitive strings on;
#lexeme separation on;
#reserve terminals on;
// Prologue definition
#prologue
[*
/*
* Includes
*/
#include "rb_global.h"
/* C parser configuration defines */
#define UNICC_DEBUG 0
#define UNICC_STACKDEBUG 0
#define UNICC_GETINPUT *( cur.src++ )
//#define UNICC_SRC_MOVE( s, l ) move_src( s, l )
/*
#define UNICC_PARSE_ERROR( pcb ) \
parse_error( ( pcb )->line, ( pcb )->sym, ( pcb )->tos->state, \
&( *( @@prefix_act[ ( pcb )->tos->state ] ) ), @@prefix_symbol_names, \
@@prefix_whitespaces )
*/
/*
* Global variables
*/
extern CINFO cur;
static srcpos pos_begin;
/*
* Functions
*/
void rb_comp_current_srcpos( srcpos* pos )
{
pos->line = cur.line;
pos->filename = cur.filename;
}
srcpos* rb_comp_cur_pos( void )
{
static srcpos sp;
rb_comp_current_srcpos( &sp );
return &( sp );
}
static void move_src( char* s, int l )
{
while( l > 0 )
{
if( *s == '\n' )
{
cur.line ++;
rb_comp_current_srcpos( &cur.stmt_begin );
}
/*
printf( ">%c< %ld\n", *s, cur.line );
*/
s++;
l--;
}
/*
printf( "--ok\n" );
*/
}
#if 0 /* JMM Oct, 2017 temporarily removed.
static void parse_error( int line, int sym, int state,
int* act, char** names, int* white )
{
int i;
char* tokens = (char*)NULL;
char* tmp;
srcpos pos;
rb_comp_current_srcpos( &pos );
/* Only one token? Then use other error message! */
if( *act == 1 )
{
rb_comp_error( &pos, "parse_error_single_token",
"token", names[ act[ 1 ] ], (char*)NULL );
}
else
{
for( i = 1; i < *act * 3; i += 3 )
{
if( !( tmp = (char*)pmalloc(
( pstrlen( names[ act[ i ] ] )
+ 2 + 1 ) * sizeof( char ) ) ) )
{
OUTOFMEM;
}
sprintf( tmp, "%s%s", names[ act[ i ] ],
( ( i+3 < *act * 3 ) ? ", " : "" ) );
tokens = pstrcatstr( tokens, tmp, TRUE );
}
rb_comp_error( &pos, "parse_error_multi_token",
"token", tokens, (char*)NULL );
pfree( tokens );
}
}
#endif
*];
#epilogue [* *];
/*
* Grammar
*/
// Start symbol
program$ -> global_statement*
( "END" '\n'* )?
;
// General program structure
global_statement -> statement_or_empty
| funcdef
| procdef
;
statement_or_empty -> statement
| '\n'
;
statement ->
if_block
| "IF" condition stack_jmp:jmp statement
[*
rb_comp_patch_jmp( &cur.prog, VMC_JMPFALSE, @jmp );
*]
| "REPEAT"
<REGION>(
[*
memcpy( &@@, &cur.region, sizeof( REGION ) );
memset( &cur.region, 0, sizeof( REGION ) );
cur.region.type = REGION_ITERATION;
cur.region.begin = cur.prog.code_next;
*]):prev_region
'\n' statement_or_empty*
"UNTIL"
<vm_addr>(
[* @@ = cur.prog.code_next; *]):cont_target
condition stack_jmp:jmp '\n'
[*
rb_comp_patch( VM_GET_CODE( &cur.prog, @jmp ),
VMC_JMPFALSE, &( cur.region.begin ) );
rb_comp_region_close( &@prev_region,
cur.prog.code_next, @cont_target );
*]
| "WHILE"
<REGION>(
[*
memcpy( &@@, &cur.region, sizeof( REGION ) );
memset( &cur.region, 0, sizeof( REGION ) );
cur.region.type = REGION_ITERATION;
cur.region.begin = cur.prog.code_next;
*]):prev_region
condition stack_jmp:jmp_false '\n'
statement_or_empty*
"WEND" '\n'
[*
rb_comp_gen( &cur.prog, VMC_JMP, &( cur.region.begin ) );
rb_comp_patch( VM_GET_CODE( &cur.prog, @jmp_false ),
VMC_JMPFALSE, &( cur.prog.code_next ) );
rb_comp_region_close( &@prev_region,
cur.prog.code_next, cur.region.begin );
*]
/* TODO: EACH-LOOP
| "EACH"
<REGION>(
[*
memcpy( &@@, &cur.region, sizeof( REGION ) );
memset( &cur.region, 0, sizeof( REGION ) );
cur.region.type = REGION_ITERATION;
cur.region.begin = cur.prog.code_next;
*]):prev_region
variable_address:cont_var
<VAR_INFO_SYM>(
"BY" variable_address
[* @@ = @2; *]
|
[* @@.varsym = (symbol*)NULL; *]
):index_var
"IN" variable_address:array_var '\n'
statement_or_empty*
"NEXT" '\n'
*/
| "BREAK" '\n'
[*
rb_comp_region_branch( FALSE );
*]
| "CONT" '\n'
[*
rb_comp_region_branch( TRUE );
*]
| "RET" '\n'
[* char* str;
if( !cur.proc )
{
printf( "Error: RET used not within "
"a procedure/function\n" );
}
else
{
if( cur.proc->function )
{
/* We push an empty string onto
the stack, as function return
result */
str = rb_str_pool_append(
&( cur.prog.cstr ), "", TRUE );
rb_comp_gen( &cur.prog,
VMC_PUSHSTR, (void*)&str );
}
rb_comp_proc_return( cur.proc );
}
*]
| "RET" expression '\n'
[* if( !cur.proc )
{
printf( "Error: RET used not within "
"a procedure/function\n" );
}
else if( !( cur.proc->function ) )
{
printf( "Error: Return value not "
"allowed in procedure!\n" );
}
else
rb_comp_proc_return( cur.proc );
*]
| "DEC" dec_parms '\n'
| "RESET" reset_parms '\n'
| "GOSUB" ident '\n'
[* printf( "stmt: Gosub\n" ); *]
| "GOTO" ident '\n'
[* rb_comp_label_call( @ident ); *]
| "RESUME" '\n'
[* printf( "stmt: Resume\n" ); *]
| "LET"? variable_address:var '=' expression '\n'
[*
if( @var.varsym->native )
{
if( !( @var.varsym->offset.variable.set ) )
{
rb_comp_error( &( cur.stmt_begin ),
"native_var_no_assign",
"var", @var.varsym->name,
(char*)NULL );
}
rb_comp_gen( &cur.prog, VMC_NSTORE,
&( @var.varsym->offset.variable.set ) );
}
else if( @var.varsym->constant )
{
rb_comp_error( &( cur.stmt_begin ),
"constant_assign",
"var", @var.varsym->name,
(char*)NULL );
}
else
rb_comp_gen( &cur.prog, VMC_STORE,
(void*)NULL );
*]
| '%' ident '\n'
[*
symbol* lbl;
lbl = rb_comp_get_label( @ident, TRUE );
rb_comp_backpatch_label_calls( lbl );
*]
| func_call '\n'
[**]
| proc_call '\n'
[**]
| &error '\n'
[* UNICC_CLEARIN(pcb); *]
;
if_block -> "IF" condition
<vm_addr>(
[*
@@ = rb_comp_next_addr( &cur.prog, VMC_JMPFALSE );
*]):jmp
'\n' statement_or_empty*
elseif_block?:next
"ENDIF" '\n'
[*
vm_addr jump;
if( @next )
{
jump = VM_NEXT_OF( &cur.prog, @next );
rb_comp_patch( VM_GET_CODE( &cur.prog, @jmp ),
VMC_JMPFALSE, &jump );
rb_comp_patch( VM_GET_CODE( &cur.prog, @next ),
*VM_GET_CODE( &cur.prog, @next ),
&( cur.prog.code_next ) );
}
else
rb_comp_patch( VM_GET_CODE( &cur.prog, @jmp ),
*VM_GET_CODE( &cur.prog, @jmp ),
&( cur.prog.code_next ) );
*]
;
elseif_block<vm_addr>
-> "ELSEIF" stack_jmp:skip condition
<vm_addr>(
[* @@ = rb_comp_next_addr( &cur.prog, VMC_JMPFALSE );
*]):jmp
'\n' statement_or_empty*
elseif_block?:next
[*
vm_addr jump;
if( @next )
{
jump = VM_NEXT_OF( &cur.prog, @next );
rb_comp_patch( VM_GET_CODE( &cur.prog, @jmp ),
VMC_JMPFALSE, &jump );
rb_comp_patch( VM_GET_CODE( &cur.prog, @next ),
*VM_GET_CODE( &cur.prog, @next ),
&( cur.prog.code_next ) );
}
else
rb_comp_patch( VM_GET_CODE( &cur.prog, @jmp ),
*VM_GET_CODE( &cur.prog, @jmp ),
&( cur.prog.code_next ) );
@@ = @skip;
*]
| "ELSE" stack_jmp:skip '\n'
statement_or_empty*
[*
@@ = @skip;
*]
;
// Variable declarations
dec_parms -> dec_parms ',' variable_address
[*
rb_comp_gen( &cur.prog, VMC_INIT, (void*)NULL );
*]
| variable_address
[*
rb_comp_gen( &cur.prog, VMC_INIT, (void*)NULL );
*]
;
// Variable reset/free
reset_parms -> reset_parms ',' variable_address
[*
rb_comp_gen( &cur.prog, VMC_FREE, (void*)NULL );
*]
| variable_address
[*
rb_comp_gen( &cur.prog, VMC_FREE, (void*)NULL );
*]
;
// Procedure- and Function declarations
funcdef_entry
<symbol*> -> ident:ident procparmdef:parameter
[* @@ = rb_comp_proc_header( @ident,
TRUE, @parameter );
*]
;
funcdef -> "FUNC" stack_jmp:jmp stack_scope:prev_scope
funcdef_entry:func '\n'
stack_last_parm:last_param
statement_or_empty* "ENDFUNC" '\n'
[*
rb_comp_proc_complete( @func,
@last_param, &@prev_scope, @jmp );
*]
;
procdef_entry
<symbol*> -> ident:ident procparmdef:parameter
[* @@ = rb_comp_proc_header( @ident,
FALSE, @parameter );
*]
;
procdef -> "PROC" stack_jmp:jmp stack_scope:prev_scope
procdef_entry:proc '\n'
stack_last_parm:last_param
statement_or_empty* "ENDPROC" '\n'
[*
rb_comp_proc_complete( @proc,
@last_param, &@prev_scope, @jmp );
*]
;
procparmdef<plist*>
-> ':' procparms
[* @@ = @2; *]
|
[* @@ = (plist*)NULL; *]
;
procparms<plist*> -> procparms ',' procparm
[* plist_push( @1, (void*)@3 );
@@ = @1;
*]
| procparm
[* @@ = plist_create( 0, PLIST_MOD_PTR );
plist_push( @@, (void*)@1 ); *]
;
procparm<symbol*> -> param_variable
[* @@ = rb_symtab_new( @1.varname, SYM_VAR );
cur.scope = rb_symtab_engage_scope(
cur.scope, @@ );
pfree( @1.varname );
@@->global = FALSE;
@@->defined = TRUE;
@@->pointer = @1.pointer;
*]
;
// Variables
varname_tail<char*>
-> varname_tail 'A-Za-z0-9_ '
[* @@ = pstrcatchar( @1, @2 );
*]
| 'A-Za-z0-9_ '
[* @@ = pstrcatchar( (char*)NULL, @1 );
*]
;
varname<char*> -> 'A-Za-z_ ' varname_tail?
[* @@ = pstrcatchar( (char*)NULL, @1 );
@@ = pstrcatstr( @@, @2, TRUE );
*]
;
varindex<char> -> varindex ','? expression
[* @@ = @1 + 1; *]
| expression
[* @@ = 1; *]
;
param_variable
<VAR_INFO> -> '[' '*'? varname:name ']'
[*
@@.varname = @name;
if( @2 == '*' )
@@.pointer = TRUE;
else
@@.pointer = FALSE;
*]
;
simple_variable
<VAR_INFO> -> '[' '&'? varname:name ']'
[*
@@.varname = @name;
if( @2 == '&' )
@@.pointer = TRUE;
else
@@.pointer = FALSE;
*]
;
complex_variable
<VAR_INFO> -> '[' '&'? varname:name ':'? varindex:index ']'
[* /* Here, the array index depth is pushed;
This is required by the VMC_LOAD_ARRAY */
rb_comp_gen( &cur.prog, VMC_PUSHCHR, &@index );
@@.varname = @name;
if( @2 == '&' )
@@.pointer = TRUE;
else
@@.pointer = FALSE;
*]
;
variable
<VAR_INFO_SYM> -> simple_variable
[* @@.varsym = rb_comp_get_symbol(
@1.varname, SYM_VAR, TRUE );
@@.varsym->used = TRUE;
pfree( @1.varname );
/* While this is not a native variable, put 0 as
dimension depth indicator */
if( !( @@.varsym->constant || @@.varsym->native ) )
{
char null_depth = 0;
/* We push a 0 as indicator that no variable
dimensions are accessed here! */
rb_comp_gen( &cur.prog,
VMC_PUSHCHR, &null_depth );
}
@@.pointer = @1.pointer;
*]
| complex_variable
[* @@.varsym = rb_comp_get_symbol(
@1.varname, SYM_VAR, TRUE );
@@.varsym->used = TRUE;
pfree( @1.varname );
if( @@.varsym->constant )
{
rb_comp_error( &( cur.stmt_begin ),
"constant_array_access",
"var", @@.varsym->name,
(char*)NULL );
}
else if( @@.varsym->native )
{
rb_comp_error( &( cur.stmt_begin ),
"native_var_no_array",
"var", @@.varsym->name,
(char*)NULL );
}
@@.pointer = @1.pointer;
*]
;
variable_address
<VAR_INFO_SYM> -> variable
[*
if( @1.varsym->native || @1.varsym->constant )
{
/* Do nothing! */
}
else if( !( @1.varsym->global ) )
{
long addr = @1.varsym->offset._long;
if( addr >= 0 )
addr += VM_ACTREC_SIZE;
rb_comp_gen( &cur.prog, VMC_PUSHINT, &addr );
rb_comp_gen( &cur.prog, VMC_PUSHFRM,
(void*)NULL );
rb_comp_gen( &cur.prog, VMC_ADD,
(void*)NULL );
}
else
{
rb_comp_gen( &cur.prog, VMC_PUSHINT,
&( @1.varsym->offset._long ) );
}
@@ = @1;
*]
;
// Function/procedure calls
fct<PROC_INFO> -> ident:procname
[*
if( !( @@.proc = rb_comp_get_symbol(
@procname, SYM_PROC, TRUE ) ))
{
pfree( @procname );
OUTOFMEM;
}
pfree( @procname );
@@.begin = cur.prog.code_next;
*]
;
in_expr_func_call -> fct '(' parameters:parameters ')'
[* rb_comp_proc_call( @fct.proc, TRUE,
@parameters, @fct.begin );
*]
;
func_call -> fct '=' parameters:parameters
[* rb_comp_proc_call( @fct.proc, TRUE,
@parameters, @fct.begin );
rb_comp_gen( &cur.prog, VMC_STORE, (void*)NULL );
*]
;
proc_call -> fct parameters:parameters
[* pboolean call_as_func = FALSE;
symbol* sym;
struct param* parm;
/* Special case function call:
Function with no parameters */
if( ( sym = rb_symtab_find( @fct.proc->name,
SYM_PROC ) )
&& plist_count( @parameters ) == 1 )
{
parm = (struct param*)
plist_access(
plist_first(
@parameters ) );
if( parm->var && sym->function )
{
call_as_func = TRUE;
rb_comp_patch( VM_GET_CODE( &cur.prog,
parm->push_code ), VMC_NOP,
(void*)NULL );
@parameters = plist_free( @parameters );
pfree( parm );
}
}
rb_comp_proc_call( @fct.proc, call_as_func,
@parameters, @fct.begin );
if( call_as_func )
rb_comp_gen( &cur.prog, VMC_STORE, (void*)NULL );
*]
;
parameters<plist*> -> parameter_list
[* @@ = @1; *]
|
[* @@ = (plist*)NULL; *]
;
parameter_list<plist*>
-> parameter_list ',' expression
[* plist_push( @1,
(void*)pmemdup( &@3, sizeof( struct param ) ) );
@@ = @1;
*]
| expression
[* @@ = plist_create( 0, PLIST_MOD_PTR );
plist_push( @@,
(void*)pmemdup( &@1, sizeof( struct param ) ) );
*]
;
// Expressions
value<struct param> -> '\'' string_content '\''
[*
@@.push_code = rb_comp_gen( &cur.prog,
VMC_PUSHSTR, (void*)&@2 );
@@.code_base = rb_comp_cur_addr( &cur.prog );
@@.is_const = TRUE;
@@.var = (symbol*)NULL;
*]
| integer
[*
@@.push_code = rb_comp_gen( &cur.prog, VMC_PUSHINT,
(void*)&@1 );
@@.code_base = rb_comp_cur_addr( &cur.prog );
@@.is_const = TRUE;
@@.var = (symbol*)NULL;
*]
| float
[*
double d;
d = atof( @1 );
pfree( @1 );
@@.push_code = rb_comp_gen( &cur.prog, VMC_PUSHDBL,
(void*)&d );
@@.code_base = rb_comp_cur_addr( &cur.prog );
@@.is_const = TRUE;
@@.var = (symbol*)NULL;
*]
| &error
;
integer<long> -> integer '0-9'
[* @@ = @1 * 10 + @2 - '0'; *]
| '0-9'
[* @@ = @1 - '0'; *]
;
float<char*> -> float_opt '.' integer
/*
[* @@ = pstrcatchar( @1, '.' );
@@ = pstrcatstr( @@, @3, TRUE );
*]
*/
| integer '.' float_opt
/*
[* @@ = pstrcatchar( @1, '.' );
@@ = pstrcatstr( @@, @3, TRUE );
*]
*/
;
float_opt
<char*> -> integer
|
[* @@ = (char*)NULL; *]
;
string_content
<char*> -> string_content !'\''
[* @@ = pstrcatchar( @1, (char)@2 ); *]
|
[* @@ = (char*)NULL; *]
;
factor
<struct param> -> value
[*
@@ = @1;
*]
| variable_address
[*
if( @1.varsym->constant )
{
rb_comp_push_constant(
@1.varsym->offset.constant );
}
else if( @1.varsym->native )
{
if( !( @1.varsym->offset.variable.get ) )
{
rb_comp_error( &( cur.stmt_begin ),
"native_var_no_read",
"var", @1.varsym->name,
(char*)NULL );
}
@@.push_code = rb_comp_gen( &cur.prog, VMC_NLOAD,
&( @1.varsym->offset.variable.get ) );
}
else
{
if( @1.pointer )
{
@@.push_code = rb_comp_gen( &cur.prog,
VMC_PTRLOAD, (void*)NULL );
@@.ptrload = TRUE;
}
else
{
@@.push_code = rb_comp_gen( &cur.prog,
VMC_LOAD, (void*)NULL );
@@.ptrload = FALSE;
}
}
@@.var = @1.varsym;
@@.is_const = FALSE;
*]
| in_expr_func_call
[*
@@.var = (symbol*)NULL; /* Erstmal nicht! */
@@.is_const = FALSE;
*]
| '(' expression ')'
[* @@ = @2; *]
;
expression
<struct param> -> expression '#' expression
[* rb_comp_gen( &cur.prog, VMC_JOIN, (void*)NULL );
@@ = @1;
@@.var = (symbol*)NULL;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| expression '+' expression
[* rb_comp_gen( &cur.prog, VMC_ADD, (void*)NULL );
@@ = @1;
@@.var = (symbol*)NULL;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| expression '-' expression
[* rb_comp_gen( &cur.prog, VMC_SUB, (void*)NULL );
@@ = @1;
@@.var = (symbol*)NULL;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| expression '*' expression
[* rb_comp_gen( &cur.prog, VMC_MUL, (void*)NULL );
@@ = @1;
@@.var = (symbol*)NULL;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| expression '/' expression
[* rb_comp_gen( &cur.prog, VMC_DIV, (void*)NULL );
@@ = @1;
@@.var = (symbol*)NULL;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| expression '~' expression
[* rb_comp_gen( &cur.prog, VMC_MOD, (void*)NULL );
@@ = @1;
@@.var = (symbol*)NULL;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| '!' expression
[* rb_comp_gen( &cur.prog, VMC_NOT, (void*)NULL );
@@ = @2;
@@.var = (symbol*)NULL;
@@.is_const = @2.is_const;
*]
| factor
;
condition
<struct param> -> condition '|' condition
[*
rb_comp_gen( &cur.prog, VMC_LOR, (void*)NULL );
@@ = @1;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| condition '&' condition
[*
rb_comp_gen( &cur.prog, VMC_LAND, (void*)NULL );
@@ = @1;
rb_comp_optimize_operator( &@@, &@1, &@3 );
*]
| condition '=' condition
[*
rb_comp_gen( &cur.prog, VMC_EQU, (void*)NULL );
@@ = @1;
rb_comp_optimize_operator( &@@, &@1, &@3 );