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pp.y
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pp.y
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%{
#include "y.tab.h"
/* INSTRUCTIONS FOR COMPILING WITH YACC/BISON:
1) Let's assume this file is saved on your machine as ppy.y
2) Run yacc or bison to create an output file without #line directives as well
as a header file. On my machine, the command required is
bison -l -d ppy.y
3) This will produce a source code file y.tab.c and a header file y.tab.h.
As produced, the header file won't be compileable; we need to add the
struct definitions, enum definitions, and function declarations to it.
That information is given in the comment section directly below these
instructions.
4) Copy-paste the commented-out block of text here (starting at #ifndef Y_TAB_H
and ending at void yyerror(char *);), uncommented, to the very top of y.tab.h.
5) At the very bottom of y.tab.h, add the following line of text:
#endif
6) y.tab.h and y.tab.c should now compile with no further modifications.
*/
// EXTRA y.tab.h INFORMATION HERE
/*
#ifndef Y_TAB_H
#define Y_TAB_H
#include "pexec.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
typedef struct pptree_node pptree;
typedef union treedata {
pptree *tree;
char *str;
long i;
char c;
double f;
} treedata;
struct pptree_node {
int type;
treedata l1;
treedata l2;
};
pptree *new_pptree(int, treedata, treedata);
enum PPTYPES {
PPBLOCK, PPARR, PPTAB, PPOR, PPAND, PPLT, PPGT, PPLEQ, PPGEQ,
PPEQ, PPNEQ, PPBOR, PPBXOR, PPBAND, PPPLUS, PPMINUS, PPSHL, PPSHR, PPMULT,
PPDIV, PPMOD, PPNOT, PPLEN, PPUNM, PPMAX, PPBNOT, PPCALL, PPARRACC, PPTABACC,
PPLTABACC, PPSTRLIT, PPMETA, PPSUP, PPINTLIT, PPCHRLIT, PPFLTLIT, PPFUNC,
PPCODE, PPIDENT, PPUNDEF, PPFALSE, PPNULL, PPTRUE, PPARGC, PPARGV, PPRETC,
PPRETV, PPGLOBALS, PPLOCALS, PPEXPRLIST, PPASSLIST, PPASSPAIR, PPIF, PPUNLESS,
PPCOND, PPNONE, PPWHILE, PPUNTIL, PPDOW, PPDOU, PPFOR, PPIPAIR, PPFPAIR,
PPASSIGN, PPRETURN, PPRETURNVC, PPCALLVC, PPEXIT, PPEXITVC, PPBREAK,
PPCONTINUE, PPDO
};
void pp_write_stm(pptree *);
void pp_write_block(pptree *);
void pp_free_tree(pptree *);
int pp_assign(pptree *);
int pp_enumerate_assign(pptree *);
void pp_write_else(pptree *);
void pp_write_expr(pptree *);
void pp_encode_int(long);
void pp_encode_float(double);
int len_expr_list(pptree *);
void pp_write_argenum(pptree *);
int pp_write_callnum(pptree *);
void pp_write_tablit(pptree *);
void yyerror(char *);
extern int yylineno;
*/
FILE *ppbcout;
%}
%union {
long intval;
char chrval;
double fltval;
char *strval;
pptree *pptval;
};
%token PUNDEF PFALSE PNULL PTRUE
%token PARGC PARGV PRETC PRETV
%token PAND POR PNOT
%token <intval> PGLOBAL PGLOBALS PLOCAL PLOCALS PEXTERN PNORMAL
%token PFUNC PCALLVC PRETURNVC PEXIT PEXITVC PRETURN
%token PWHILE PUNLESS PFOR PIF PELSE PDO PUNTIL PEND PIN
%token PBLOCK
%token PEOF
%token PERROR PSUCCESS
%token PBREAK PCONTINUE
%token <strval> PSTR
%token <strval> PIDENTIFIER
%token <intval> PINT
%token <fltval> PFLT
%token <chrval> PCHR
%type <pptval> expr array table block statement script expr_list ass_list
%type <pptval> else_stm if_stm loop_stm do_stm for_stm function code
%left POR
%left PAND
%left '<' PLEQ '>' PGEQ '=' PEQ PNEQ
%left '|'
%left '^'
%left '&'
%left '+' '-'
%left PSHL PSHR
%left '*' '/' '%'
%left PNOT '#' PUNMINUS '@' '~'
%left '.' PMET PSUP
%start script
%%
array:
'[' expr_list ']' { $$ = new_pptree(PPARR, (treedata)$2, (treedata)0L); }
| '[' ']' { $$ = new_pptree(PPARR, (treedata)0L, (treedata)0L); }
;
table:
'{' ass_list '}' { $$ = new_pptree(PPTAB, (treedata)$2, (treedata)0L); }
| '{' '}' { $$ = new_pptree(PPTAB, (treedata)0L, (treedata)0L); }
;
expr:
expr POR expr { $$ = new_pptree(PPOR, (treedata)$1, (treedata)$3); }
| expr PAND expr { $$ = new_pptree(PPAND, (treedata)$1, (treedata)$3); }
| expr '<' expr { $$ = new_pptree(PPLT, (treedata)$1, (treedata)$3); }
| expr '>' expr { $$ = new_pptree(PPGT, (treedata)$1, (treedata)$3); }
| expr PLEQ expr { $$ = new_pptree(PPLEQ, (treedata)$1, (treedata)$3); }
| expr PGEQ expr { $$ = new_pptree(PPGEQ, (treedata)$1, (treedata)$3); }
| expr PEQ expr { $$ = new_pptree(PPEQ, (treedata)$1, (treedata)$3); }
| expr PNEQ expr { $$ = new_pptree(PPNEQ, (treedata)$1, (treedata)$3); }
| expr '|' expr { $$ = new_pptree(PPBOR, (treedata)$1, (treedata)$3); }
| expr '^' expr { $$ = new_pptree(PPBXOR, (treedata)$1, (treedata)$3); }
| expr '&' expr { $$ = new_pptree(PPBAND, (treedata)$1, (treedata)$3); }
| expr '+' expr { $$ = new_pptree(PPPLUS, (treedata)$1, (treedata)$3); }
| expr '-' expr { $$ = new_pptree(PPMINUS, (treedata)$1, (treedata)$3); }
| expr PSHL expr { $$ = new_pptree(PPSHL, (treedata)$1, (treedata)$3); }
| expr PSHR expr { $$ = new_pptree(PPSHR, (treedata)$1, (treedata)$3); }
| expr '*' expr { $$ = new_pptree(PPMULT, (treedata)$1, (treedata)$3); }
| expr '/' expr { $$ = new_pptree(PPDIV, (treedata)$1, (treedata)$3); }
| expr '%' expr { $$ = new_pptree(PPMOD, (treedata)$1, (treedata)$3); }
| PNOT expr { $$ = new_pptree(PPNOT, (treedata)$2, (treedata)0L); }
| '#' expr { $$ = new_pptree(PPLEN, (treedata)$2, (treedata)0L); }
| '-' expr %prec PUNMINUS {
$$ = new_pptree(PPUNM, (treedata)$2, (treedata)0L); }
| '@' expr { $$ = new_pptree(PPMAX, (treedata)$2, (treedata)0L); }
| '~' expr { $$ = new_pptree(PPBNOT, (treedata)$2, (treedata)0L); }
| expr '(' expr_list ')' { $$ = new_pptree(PPCALL, (treedata)$1,
(treedata)$3); }
| expr '(' ')' { $$ = new_pptree(PPCALL, (treedata)$1,
(treedata)0L); }
| expr '[' expr ']' { $$ = new_pptree(PPARRACC, (treedata)$1,
(treedata)$3); }
| expr '.' PIDENTIFIER
{ $$ = new_pptree(PPTABACC, (treedata)$1,
(treedata)new_pptree(PPIDENT, (treedata)(long)PNORMAL,
(treedata)$3)); }
| expr '.' PSTR
{ $$ = new_pptree(PPTABACC, (treedata)$1,
(treedata)new_pptree(PPSTRLIT,
(treedata)$3,
(treedata)0L)); }
| expr '.' '(' expr ')' { $$ = new_pptree(PPLTABACC, (treedata)$1,
(treedata)$4); }
| expr PMET { $$ = new_pptree(PPMETA, (treedata)$1,
(treedata)0L); }
| expr PSUP { $$ = new_pptree(PPSUP, (treedata)$1,
(treedata)0L); }
| PINT { $$ = new_pptree(PPINTLIT, (treedata)$1,
(treedata)0L); }
| PCHR { $$ = new_pptree(PPCHRLIT, (treedata)$1,
(treedata)0L); }
| PSTR { $$ = new_pptree(PPSTRLIT, (treedata)$1,
(treedata)0L); }
| PFLT { $$ = new_pptree(PPFLTLIT, (treedata)$1,
(treedata)0L); }
| array { $$ = $1; }
| table { $$ = $1; }
| function { $$ = $1; }
| code { $$ = $1; }
| PLOCAL PIDENTIFIER { $$ = new_pptree(PPIDENT, (treedata)(long)LOCAL,
(treedata)$2); }
| PGLOBAL PIDENTIFIER { $$ = new_pptree(PPIDENT, (treedata)(long)GLOBAL,
(treedata)$2); }
| PEXTERN PIDENTIFIER { $$ = new_pptree(PPIDENT, (treedata)(long)EXTERN,
(treedata)$2); }
| PIDENTIFIER { $$ = new_pptree(PPIDENT, (treedata)(long)NORMAL,
(treedata)$1); }
| '(' expr ')' { $$ = $2; }
| PUNDEF { $$ = new_pptree(PPUNDEF, (treedata)0L,
(treedata)0L); }
| PFALSE { $$ = new_pptree(PPFALSE, (treedata)0L,
(treedata)0L); }
| PNULL { $$ = new_pptree(PPNULL, (treedata)0L,
(treedata)0L); }
| PTRUE { $$ = new_pptree(PPTRUE, (treedata)0L,
(treedata)0L); }
| PARGC { $$ = new_pptree(PPARGC, (treedata)0L,
(treedata)0L); }
| PARGV { $$ = new_pptree(PPARGV, (treedata)0L,
(treedata)0L); }
| PRETC { $$ = new_pptree(PPRETC, (treedata)0L,
(treedata)0L); }
| PRETV { $$ = new_pptree(PPRETV, (treedata)0L,
(treedata)0L); }
| PGLOBALS { $$ = new_pptree(PPGLOBALS, (treedata)0L,
(treedata)0L); }
| PLOCALS { $$ = new_pptree(PPLOCALS, (treedata)0L,
(treedata)0L); }
;
expr_list:
expr_list ',' expr { $$ = new_pptree(PPEXPRLIST, (treedata)$1,
(treedata)$3); }
| expr { $$ = new_pptree(PPEXPRLIST, (treedata)0L,
(treedata)$1); }
;
ass_list:
ass_list ',' PIDENTIFIER '=' expr
{ $$ = new_pptree(PPASSLIST, (treedata)$1,
(treedata)new_pptree(PPASSPAIR,
(treedata)
new_pptree(PPIDENT,
(treedata)(long)PNORMAL,
(treedata)$3),
(treedata)$5)); }
| PIDENTIFIER '=' expr { $$ = new_pptree(PPASSPAIR,
(treedata)new_pptree(PPIDENT,
(treedata)(long)PNORMAL,
(treedata)$1),
(treedata)$3); }
;
else_stm:
PELSE ':' block PEND ';' { $$ = $3;}
| PELSE if_stm { $$ = $2; }
;
if_stm:
PIF expr ':' block else_stm
{ $$ = new_pptree(PPIF,
(treedata)$2,
(treedata)new_pptree(PPCOND,(treedata)$4,(treedata)$5)); }
| PIF expr ':' block PEND ';'
{ $$ = new_pptree(PPIF,
(treedata)$2,
(treedata)new_pptree(PPCOND,(treedata)$4,
(treedata)new_pptree(PPNONE,(treedata)0L,
(treedata)0L))); }
| PUNLESS expr ':' block else_stm
{ $$ = new_pptree(PPUNLESS,
(treedata)$2,
(treedata)new_pptree(PPCOND,(treedata)$4,(treedata)$5)); }
| PUNLESS expr ':' block PEND ';'
{ $$ = new_pptree(PPUNLESS,
(treedata)$2,
(treedata)new_pptree(PPCOND,(treedata)$4,
(treedata)new_pptree(PPNONE,
(treedata)0L,
(treedata)0L))); }
;
loop_stm:
PWHILE expr ':' block PEND ';'
{ $$ = new_pptree(PPWHILE,(treedata)$2,(treedata)$4); }
| PUNTIL expr ':' block PEND ';'
{ $$ = new_pptree(PPUNTIL,(treedata)$2,(treedata)$4); }
;
do_stm:
PDO ':' block PWHILE expr ';'
{ $$ = new_pptree(PPDOW,(treedata)$5,(treedata)$3); }
| PDO ':' block PUNTIL expr ';'
{ $$ = new_pptree(PPDOU,(treedata)$5,(treedata)$3); }
;
for_stm:
PFOR PIDENTIFIER ',' PIDENTIFIER PIN expr ':' block PEND ';'
{ $$ = new_pptree(PPFOR,
(treedata)new_pptree(PPIPAIR,(treedata)$2,(treedata)$4),
(treedata)new_pptree(PPFPAIR,(treedata)$6,(treedata)$8)); }
;
statement:
expr_list '=' expr ';' { $$ = new_pptree(PPASSIGN,(treedata)$1,(treedata)$3); }
| expr ';' { $$ = $1; }
| if_stm { $$ = $1; }
| loop_stm { $$ = $1; }
| do_stm { $$ = $1; }
| for_stm { $$ = $1; }
| PRETURN '(' expr_list ')' ';' { $$ = new_pptree(PPRETURN,(treedata)$3,
(treedata)0L); }
| PRETURN '(' ')' ';' { $$ = new_pptree(PPRETURN,(treedata)0L,
(treedata)0L); }
| PRETURNVC '(' expr_list ')' ';' { $$ = new_pptree(PPRETURNVC,(treedata)$3,
(treedata)0L); }
| PEXIT '(' expr_list ')' ';' { $$ = new_pptree(PPEXIT,(treedata)$3,
(treedata)0L); }
| PEXIT '(' ')' ';' { $$ = new_pptree(PPEXIT,(treedata)0L,
(treedata)0L); }
| PEXITVC '(' expr_list ')' ';' { $$ = new_pptree(PPEXITVC,(treedata)$3,
(treedata)0L); }
| PDO expr ';' { $$ = new_pptree(PPDO, (treedata)$2,
(treedata)0L); }
| PBREAK ';' { $$ = new_pptree(PPBREAK,(treedata)0L,
(treedata)0L); }
| PCONTINUE ';' { $$ = new_pptree(PPCONTINUE,(treedata)0L,
(treedata)0L); }
| ';' { $$ = new_pptree(PPNONE, (treedata)0L,
(treedata)0L); }
;
function:
PFUNC '(' expr_list ')' ':' block PEND
{ $$ = new_pptree(PPFUNC,(treedata)$3,(treedata)$6); }
| PFUNC '(' ')' ':' block PEND
{ $$ = new_pptree(PPFUNC,(treedata)0L,(treedata)$5); }
| PCALLVC '(' expr_list ')' { $$ = new_pptree(PPCALLVC,(treedata)$3,
(treedata)0L); }
;
code:
PBLOCK ':' block PEND { $$ = new_pptree(PPCODE,(treedata)$3,(treedata)0L); }
;
block:
block statement { $$ = new_pptree(PPBLOCK,(treedata)$1,(treedata)$2); }
| /* NULL */ { $$ = new_pptree(PPNONE,(treedata)0L,(treedata)0L); }
;
script:
block { pp_write_block($1); pp_free_tree($1);
fputc(CODEEND,ppbcout); YYACCEPT; }
;
%%
pptree *new_pptree(int type, treedata l1, treedata l2)
{
pptree *new = malloc(sizeof(pptree));
if (!new) return NULL;
new->type = type;
new->l1 = l1;
new->l2 = l2;
return new;
}
/* pp_assign: assume an item is at the top of the stack, and write an assignment
of that item to the slot specified by the given tree. */
int pp_assign(pptree *tree)
{
switch (tree->type) {
case PPIDENT:
fputc(ASS,ppbcout);
fputc(tree->l1.i,ppbcout);
fputs(tree->l2.str,ppbcout);
fputc('\0',ppbcout);
break;
case PPTABACC:
pp_write_expr(tree->l1.tree);
switch (tree->l2.tree->type) {
case PPIDENT:
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l2.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
break;
case PPSTRLIT:
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l2.tree->l1.str,ppbcout);
fputc('\0',ppbcout);
break;
default:
pp_write_expr(tree->l2.tree);
break;
}
fputc(TABSET,ppbcout);
break;
case PPLTABACC:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(TABSET,ppbcout);
break;
case PPARRACC:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(ARRSET,ppbcout);
break;
case PPMETA:
pp_write_expr(tree->l1.tree);
fputc(SETMETA,ppbcout);
break;
case PPSUP:
pp_write_expr(tree->l1.tree);
fputc(SETSUP,ppbcout);
break;
default:
printf("parse error: invalid assignment\n"); exit(1);
}
return 1;
}
/* pp_enumerate_assign: assign a particular index of argv to the given
expression in the expression list; determine index through recursion.
The given trees must always be expr_lists. */
int pp_enumerate_assign(pptree *tree)
{
int index;
if (tree->l1.i==0)
index = 0;
else
index = pp_enumerate_assign(tree->l1.tree);
fputc(RETV,ppbcout);
fputc(PUSHINT,ppbcout);
pp_encode_int(index);
fputc(ARRACC,ppbcout);
pp_assign(tree->l2.tree);
return index+1;
}
void pp_write_else(pptree *tree)
{
switch (tree->type) {
case PPBLOCK:
pp_write_block(tree);
break;
case PPIF:
case PPUNLESS:
pp_write_stm(tree);
break;
case PPNONE:
default:
break;
}
}
void pp_write_stm(pptree *tree)
{
int i;
pptree *t;
switch (tree->type) {
case PPASSIGN:
pp_write_expr(tree->l2.tree);
if ((tree->l1.tree->l1.i==0)&&
(tree->l1.tree->l2.tree->type==PPIDENT)) {
/* CASE: we can do a simple assignment */
fputc(ASS,ppbcout);
fputc(tree->l1.tree->l2.tree->l1.i,ppbcout);
fputs(tree->l1.tree->l2.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
} else if (tree->l1.tree->l1.i==0) {
/* CASE: only one assignment */
pp_assign(tree->l1.tree->l2.tree);
} else if (tree->l1.tree->l1.i!=0) {
/* CASE: there is more than one assignment to do */
fputc(DEL,ppbcout);
pp_enumerate_assign(tree->l1.tree);
}
break;
case PPIF:
pp_write_expr(tree->l1.tree);
fputc(IF,ppbcout);
pp_write_block(tree->l2.tree->l1.tree);
fputc(ELSE,ppbcout);
pp_write_else(tree->l2.tree->l2.tree);
fputc(IFEND,ppbcout);
break;
case PPUNLESS:
pp_write_expr(tree->l1.tree);
fputc(NOT,ppbcout);
fputc(IF,ppbcout);
pp_write_block(tree->l2.tree->l1.tree);
fputc(ELSE,ppbcout);
pp_write_else(tree->l2.tree->l2.tree);
fputc(IFEND,ppbcout);
break;
case PPBREAK:
fputc(BREAK,ppbcout);
break;
case PPCONTINUE:
fputc(CONT,ppbcout);
break;
case PPWHILE:
fputc(WHILEPREP,ppbcout);
pp_write_expr(tree->l1.tree);
fputc(CODEEND,ppbcout);
pp_write_block(tree->l2.tree);
fputc(WHILEITER,ppbcout);
break;
case PPUNTIL:
fputc(WHILEPREP,ppbcout);
pp_write_expr(tree->l1.tree);
fputc(NOT,ppbcout);
fputc(CODEEND,ppbcout);
pp_write_block(tree->l2.tree);
fputc(WHILEITER,ppbcout);
break;
case PPDO:
pp_write_expr(tree->l1.tree);
fputc(DO,ppbcout);
break;
case PPDOW:
fputc(DOWPREP,ppbcout);
pp_write_expr(tree->l1.tree);
fputc(CODEEND,ppbcout);
pp_write_block(tree->l2.tree);
fputc(WHILEITER,ppbcout);
break;
case PPDOU:
fputc(WHILEPREP,ppbcout);
pp_write_expr(tree->l1.tree);
fputc(NOT,ppbcout);
fputc(CODEEND,ppbcout);
pp_write_block(tree->l2.tree);
fputc(WHILEITER,ppbcout);
break;
case PPFOR:
pp_write_expr(tree->l2.tree->l1.tree);
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l1.tree->l1.str,ppbcout);
fputc('\0',ppbcout);
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l1.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
fputc(FORPREP,ppbcout);
pp_write_block(tree->l2.tree->l2.tree);
fputc(FORITER,ppbcout);
break;
case PPRETURN:
fputc(NEWARR,ppbcout);
i = pp_write_callnum(tree->l1.tree);
fputc(PUSHRETV,ppbcout);
fputc(PUSHINT,ppbcout);
pp_encode_int(i);
fputc(PUSHRETC,ppbcout);
fputc(RETURN,ppbcout);
break;
case PPRETURNVC:
if (len_expr_list(tree->l1.tree)!=2) exit(1);
pp_write_expr(tree->l1.tree->l1.tree->l2.tree);
fputc(PUSHRETV,ppbcout);
pp_write_expr(tree->l1.tree->l2.tree);
fputc(PUSHRETC,ppbcout);
fputc(RETURN,ppbcout);
break;
case PPEXIT:
fputc(NEWARR,ppbcout);
i = pp_write_callnum(tree->l1.tree);
fputc(PUSHARGV,ppbcout);
fputc(PUSHINT,ppbcout);
pp_encode_int(i);
fputc(PUSHARGC,ppbcout);
fputc(EXIT,ppbcout);
break;
case PPEXITVC:
if (len_expr_list(tree->l1.tree)!=2) exit(1);
pp_write_expr(tree->l1.tree->l1.tree->l2.tree);
fputc(PUSHRETV,ppbcout);
pp_write_expr(tree->l1.tree->l2.tree);
fputc(PUSHRETC,ppbcout);
fputc(EXIT,ppbcout);
break;
default: // just normal expression
pp_write_expr(tree);
fputc(DEL,ppbcout);
break;
}
}
int len_expr_list(pptree *tree)
{
if (tree==NULL) return 0;
if (!tree->l1.tree) {
return 1;
} else return 1+len_expr_list(tree->l1.tree);
}
void pp_write_argenum(pptree *tree)
{
if (!tree) return;
if (!tree->l1.tree) { // case: first argument
if (tree->l2.tree->type!=PPIDENT) {
printf("pparse: argument found that is not simple identifier\n");
exit(1);
}
fputs(tree->l2.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
} else {
pp_write_argenum(tree->l1.tree);
fputs(tree->l2.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
}
}
/* assume argv is always on stack */
int pp_write_callnum(pptree *tree)
{
int index;
if (!tree) return 0;
if (!tree->l1.tree) { // case: first argument
index = 0;
} else {
index = pp_write_callnum(tree->l1.tree);
}
pp_write_expr(tree->l2.tree);
fputc(PUSHINT,ppbcout);
pp_encode_int(index);
fputc(ARRKEEP,ppbcout);
return index+1;
}
// assume table is already at top of stack
void pp_write_tablit(pptree *tree)
{
if (tree->type==PPASSLIST) {
pp_write_tablit(tree->l1.tree);
tree = tree->l2.tree;
}
pp_write_expr(tree->l2.tree);
fputc(TABKEEP,ppbcout);
fputs(tree->l1.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
return;
}
void pp_write_expr(pptree *tree)
{
int i;
switch (tree->type) {
case PPTAB:
fputc(NEWTAB,ppbcout);
if (tree->l1.tree) pp_write_tablit(tree->l1.tree);
break;
case PPARR:
fputc(NEWARR,ppbcout);
if (tree->l1.i!=0)
pp_write_callnum(tree->l1.tree);
break;
case PPOR:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(OR,ppbcout);
break;
case PPAND:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(AND,ppbcout);
break;
case PPLT:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(LT,ppbcout);
break;
case PPGT:
pp_write_expr(tree->l2.tree);
pp_write_expr(tree->l1.tree);
fputc(LT,ppbcout);
break;
case PPLEQ:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(LE,ppbcout);
break;
case PPGEQ:
pp_write_expr(tree->l2.tree);
pp_write_expr(tree->l1.tree);
fputc(LE,ppbcout);
break;
case PPEQ:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(EQ,ppbcout);
break;
case PPNEQ:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(EQ,ppbcout);
fputc(NOT,ppbcout);
break;
case PPBOR:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(BOR,ppbcout);
break;
case PPBXOR:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(BXOR,ppbcout);
break;
case PPBAND:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(BAND,ppbcout);
break;
case PPPLUS:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(ADD,ppbcout);
break;
case PPMINUS:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(SUB,ppbcout);
break;
case PPSHL:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(SHL,ppbcout);
break;
case PPSHR:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(SHR,ppbcout);
break;
case PPMULT:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(MULT,ppbcout);
break;
case PPDIV:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(DIV,ppbcout);
break;
case PPMOD:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(MOD,ppbcout);
break;
case PPNOT:
pp_write_expr(tree->l1.tree);
fputc(NOT,ppbcout);
break;
case PPLEN:
pp_write_expr(tree->l1.tree);
fputc(STRLEN,ppbcout);
break;
case PPUNM:
pp_write_expr(tree->l1.tree);
fputc(UNM,ppbcout);
break;
case PPMAX:
pp_write_expr(tree->l1.tree);
fputc(ARRMAX,ppbcout);
break;
case PPBNOT:
pp_write_expr(tree->l1.tree);
fputc(BNOT,ppbcout);
break;
case PPCALL:
if (!tree->l2.tree) {
pp_write_expr(tree->l1.tree);
fputc(NEWARR,ppbcout);
fputc(PUSHARGV,ppbcout);
fputc(PUSHINT,ppbcout);
fputc(0,ppbcout);
fputc(PUSHARGC,ppbcout);
fputc(CALL,ppbcout);
} else {
fputc(NEWARR,ppbcout);
i = pp_write_callnum(tree->l2.tree);
fputc(PUSHARGV,ppbcout);
fputc(PUSHINT,ppbcout);
pp_encode_int(i);
fputc(PUSHARGC,ppbcout);
pp_write_expr(tree->l1.tree);
fputc(CALL,ppbcout);
}
break;
case PPARRACC:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(ARRACC,ppbcout);
break;
case PPTABACC:
pp_write_expr(tree->l1.tree);
switch (tree->l2.tree->type) {
case PPIDENT:
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l2.tree->l2.str,ppbcout);
fputc('\0',ppbcout);
break;
case PPSTRLIT:
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l2.tree->l1.str,ppbcout);
fputc('\0',ppbcout);
break;
default:
pp_write_expr(tree->l2.tree);
break;
}
fputc(TABACC,ppbcout);
break;
case PPLTABACC:
pp_write_expr(tree->l1.tree);
pp_write_expr(tree->l2.tree);
fputc(TABACC,ppbcout);
break;
case PPSTRLIT:
fputc(NEWSTR,ppbcout);
fputc(WRITESTR,ppbcout);
fputs(tree->l1.str,ppbcout);
fputc('\0',ppbcout);
break;
case PPMETA:
pp_write_expr(tree->l1.tree);
fputc(GETMETA,ppbcout);
break;
case PPSUP:
pp_write_expr(tree->l1.tree);
fputc(GETSUP,ppbcout);
break;
case PPINTLIT:
if (tree->l1.i<0) fputc(PUSHINT|(1<<7),ppbcout);
else fputc(PUSHINT,ppbcout);
pp_encode_int(tree->l1.i);
break;
case PPCHRLIT:
fputc(PUSHCHAR,ppbcout);
fputc(tree->l1.c,ppbcout);
break;
case PPFLTLIT:
if (tree->l1.f<0.0) fputc(PUSHFLOAT|(1<<7),ppbcout);
else fputc(PUSHFLOAT,ppbcout);
pp_encode_float(tree->l1.f);
break;
case PPFUNC:
fputc(PUSHFUNC,ppbcout);
fputc(ARGENUM,ppbcout);
pp_write_argenum(tree->l1.tree);
fputc('\0',ppbcout);
pp_write_block(tree->l2.tree);
fputc(CODEEND,ppbcout);
break;
case PPCALLVC:
if (len_expr_list(tree->l1.tree)!=3) {
yyerror("callvc syntax error\n");
exit(1);
}
pp_write_expr(tree->l1.tree->l1.tree->l2.tree);
fputc(PUSHARGV,ppbcout);
pp_write_expr(tree->l1.tree->l2.tree);
fputc(PUSHARGC,ppbcout);
pp_write_expr(tree->l1.tree->l1.tree->l1.tree->l2.tree);
fputc(CALL,ppbcout);
break;
case PPCODE:
fputc(PUSHCODE,ppbcout);
pp_write_block(tree->l1.tree);
fputc(CODEEND,ppbcout);
break;
case PPIDENT:
fputc(GET,ppbcout);
fputc(tree->l1.i,ppbcout);
fputs(tree->l2.str,ppbcout);
fputc('\0',ppbcout);
break;
case PPUNDEF:
fputc(PUSHUNDEF,ppbcout);
break;
case PPFALSE:
fputc(PUSHFALSE,ppbcout);
break;
case PPNULL:
fputc(PUSHNULL,ppbcout);
break;
case PPTRUE:
fputc(PUSHTRUE,ppbcout);
break;
case PPARGC:
fputc(ARGC,ppbcout);
break;
case PPARGV:
fputc(ARGV,ppbcout);
break;
case PPRETC:
fputc(RETC,ppbcout);
break;
case PPRETV:
fputc(RETV,ppbcout);
break;
case PPGLOBALS:
fputc(GLOBALS,ppbcout);
break;
case PPLOCALS:
fputc(LOCALS,ppbcout);
break;
}
}
void pp_write_block(pptree *tree)
{
if (tree->type==PPNONE) return;
pp_write_block(tree->l1.tree);
pp_write_stm(tree->l2.tree);
return;
}
void pp_free_tree(pptree *tree)
{
if (!tree) return;
switch (tree->type) {
case PPBLOCK:
pp_free_tree(tree->l1.tree);
pp_free_tree(tree->l2.tree);
free(tree);
break;
case PPARR:
case PPTAB:
if (tree->l1.tree!=NULL) pp_free_tree(tree->l1.tree);
free(tree);
break;
case PPOR:
case PPAND:
case PPLT:
case PPGT:
case PPLEQ:
case PPGEQ:
case PPEQ:
case PPNEQ:
case PPBOR:
case PPBXOR:
case PPBAND:
case PPPLUS:
case PPMINUS:
case PPSHL:
case PPSHR:
case PPMULT:
case PPDIV:
case PPMOD:
pp_free_tree(tree->l1.tree);
pp_free_tree(tree->l2.tree);
free(tree);
break;
case PPNOT:
case PPLEN:
case PPUNM:
case PPMAX:
case PPBNOT:
pp_free_tree(tree->l1.tree);
free(tree);
break;
case PPCALL:
case PPARRACC:
case PPTABACC:
case PPLTABACC:
pp_free_tree(tree->l1.tree);
pp_free_tree(tree->l2.tree);
free(tree);
break;
case PPSTRLIT:
free(tree->l1.str);
free(tree);
break;
case PPMETA:
case PPSUP:
pp_free_tree(tree->l1.tree);
free(tree);
break;
case PPINTLIT:
case PPCHRLIT:
case PPFLTLIT:
free(tree);
break;
case PPFUNC:
if (tree->l1.i!=0) pp_free_tree(tree->l1.tree);
pp_free_tree(tree->l2.tree);
free(tree);
break;
case PPCODE:
pp_free_tree(tree->l1.tree);
free(tree);
break;
case PPIDENT:
free(tree->l2.str);
free(tree);
break;
case PPUNDEF:
case PPFALSE:
case PPNULL:
case PPTRUE:
case PPARGC:
case PPARGV:
case PPRETC:
case PPRETV:
case PPGLOBALS:
case PPLOCALS:
case PPBREAK:
case PPCONTINUE:
free(tree);