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|
%{
/*
* UPEM / Compilation / Projet
* Pacien TRAN-GIRARD, Adam NAILI
*/
int nb_globals = 0;
#include "symbol_table.h"
#include <stdio.h>
#include <getopt.h>
#include "generator.h"
extern int lineno;
int yylex();
void yyerror(char *);
static Scope scope = GLOBAL;
static Type return_type = VOID_T;
static bool bss_done = false;
static int num_label = 0;
static int num_if = 0;
static int num_while = 0;
static int nb_param[255];
static int num_scope = -1;
static int offset = 0;
static bool is_array = false;
static char fname[64];
%}
%union {
char caractere;
int num;
char ident[64];
int type;
char comp[3];
char addsub;
char divstar;
}
%token <caractere> CARACTERE
%token <num> NUM
%token <ident> IDENT
%token <comp> ORDER EQ
%token <addsub> ADDSUB
%token <divstar> DIVSTAR
%token OR AND CONST IF ELSE WHILE RETURN VOID PRINT READC READE
%token <type> TYPE
%type <num> Exp EB TB FB M E T F Parametres
%type <ident> LValue Declarateur
%left ','
%precedence ')'
%precedence ELSE
%%
Prog: { gen_prologue(); }
DeclConsts DeclVars DeclFoncts { gen_epilogue(); }
;
DeclConsts:
DeclConsts CONST ListConst ';'
|
;
ListConst:
ListConst ',' IDENT '=' Litteral { gen_const($<ident>1, $<num>3, scope); }
| IDENT '=' Litteral { gen_const($<ident>1, $<num>3, scope); }
;
Litteral:
NombreSigne { $<num>$ = $<num>1; }
| CARACTERE { $<num>$ = $<num>1; }
;
NombreSigne:
NUM { $<num>$ = $<num>1; }
| ADDSUB NUM { $<num>$ = $<addsub>1 == '-' ? - $<num>2 : $<num>2; }
;
DeclVars:
DeclVars TYPE Declarateurs ';'
|
;
Declarateurs:
Declarateurs ',' Declarateur { if (is_array) gen_tab_declaration($<ident>3, scope, offset);
else gen_declaration($<ident>3, $<type>0, scope); }
| Declarateur { if (is_array) gen_tab_declaration($<ident>1, scope, offset);
else gen_declaration($<ident>1, $<type>0, scope); }
;
Declarateur:
IDENT { strcpy($$, $1); is_array = false; }
| IDENT '[' NUM ']' { offset = $<num>3; strcpy($$, $1); is_array = true; }
;
DeclFoncts:
DeclFoncts DeclFonct
| DeclFonct
;
DeclFonct:
EnTeteFonct { scope = LOCAL; }
Corps { gen_function_end_declaration(fname, return_type, nb_param[num_scope]);
scope = GLOBAL; return_type = VOID_T; num_scope--; loc_clean_table(); }
;
EnTeteFonct:
TYPE IDENT PrologueCont { strcpy(fname, $<ident>2);
return_type = gen_function_declaration($<ident>2, $<type>1); }
'(' Parametres ')' { nb_param[++num_scope] = $<num>6; scope = GLOBAL;}
| VOID IDENT PrologueCont { strcpy(fname, $<ident>2);
return_type = gen_function_declaration($<ident>2, VOID_T); }
'(' Parametres ')' { nb_param[++num_scope] = $<num>6; scope = GLOBAL; }
;
PrologueCont: { scope = LOCAL; gen_prologue_continue(&bss_done); };
Parametres:
VOID { $$ = 0; }
| ListTypVar { $<num>$ = $<num>1; }
;
ListTypVar:
ListTypVar ',' TYPE IDENT { gen_declaration($<ident>4, $<type>3, scope); $<num>$ = $<num>1+1; }
| TYPE IDENT { gen_declaration($<ident>2, $<type>1, scope); $<num>$ = 1; }
;
Corps:
'{' { gen_function_param_passing(nb_param[num_scope]); }
DeclConsts DeclVars SuiteInstr '}'
;
SuiteInstr:
SuiteInstr Instr
|
;
Instr:
Exp ';'
| ';'
| RETURN Exp ';' { gen_function_return(return_type, $<type>2); }
| RETURN ';' { gen_function_return(return_type, VOID_T); }
| READE '(' IDENT ')' ';' { gen_reade($<ident>3, scope); }
| READC '(' IDENT ')' ';' { gen_readc($<ident>3, scope); }
| PRINT '(' Exp ')' ';' { gen_print($<type>3);}
| IF '(' Exp IfHandling')' Instr { gen_if_label($<num>4); }
| IF '(' Exp IfHandling')' Instr
ELSE IfEndHandling Instr IfElseEndHandling
| WHILE { gen_while_start(num_while); }
'(' Exp { gen_while_cond(num_while); }
')' Instr { gen_while_end(num_while++); }
| '{' SuiteInstr '}'
;
IfHandling: { gen_if_start($<num>$ = num_if++); };
IfEndHandling: { gen_if_end($<num>-3); };
IfElseEndHandling: { gen_ifelse_end($<num>-5); };
Exp:
LValue '=' Exp { $$ = gen_assign($<ident>1, scope); }
| EB
;
EB:
EB OR TB { gen_or($1, $3, num_label++); }
| TB
;
TB:
TB AND FB { gen_and($1, $3, num_label++); }
| FB
;
FB:
FB EQ M { gen_eq($2, $1, $3, num_label++); }
| M
;
M:
M ORDER E { gen_order($2, $1, $3, num_label++); }
| E
;
E:
E ADDSUB T { gen_addsub($2, $1, $3); }
| T
;
T:
T DIVSTAR F { gen_divstar($2, $1, $3); }
| F
;
F:
ADDSUB F { $$ = gen_signed_expr($1, $2); }
| '!' F { $$ = gen_negate_expr($2); }
| '(' Exp ')' { $$ = $2; }
| LValue { $$ = gen_value($<ident>1, scope); }
| NUM { $$ = gen_num($1, scope); }
| CARACTERE { $$ = gen_char($1, scope); }
| IDENT '(' Arguments ')' { $$ = gen_function_call($<ident>1, $<num>3); }
;
LValue:
IDENT { gen_check($<ident>1, scope); strcpy($$, $1); }
| IDENT '[' Exp ']' { gen_check($<ident>1, scope); strcpy($$, $1); }
;
Arguments:
ListExp
| {$<num>$ = 0;}
;
ListExp:
ListExp ',' Exp { $<num>$ = $<num>1 + 1; }
| Exp { $<num>$ = 1; }
;
%%
void yyerror(char *msg){
fprintf(stderr, "%s at line %d\n", msg, lineno);
}
int main(int argc, char **argv) {
char opt;
output = stdout;
while ((opt = getopt(argc, argv, "o:")) != -1)
switch (opt) {
case 'o':
output = fopen(optarg, "w+");
if (output == NULL) {
perror("Error opening output file: ");
return -1;
}
break;
default:
fputs("Exiting due to invalid option.\n", stderr);
return -1;
}
return yyparse();
}
|