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Group1.txt
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Compile.sh
if [ $# -ne 1 ]
then
echo "Please provide one argument with valid file for compilation."
exit 1
fi
if [ ! -f $1 ]
then
echo "Invalid file name!!"
exit 1
fi
filename=`echo "$1" | cut -f 1 -d '.'` # Get filename without extension
extension=`echo "$1" | cut -f 2 -d '.'`
if [ ! $extension == "c" ]
then
echo "Not a C file!!"
exit 1
fi
ext2="_Vars.txt"
ext3="_ICCode.txt"
ext4="_ASMCode.asm"
f2=${filename}${ext2}
f3=${filename}${ext3}
f4=${filename}${ext4}
bison -d --warning=none parse.y
flex lexical.l
gcc -c -w lex.yy.c
gcc -c -w parse.tab.c
gcc parse.tab.o lex.yy.o -o ex
rm lex.yy.c
rm lex.yy.o
rm parse.tab.c
rm parse.tab.h
rm parse.tab.o
./ex $1 $f3 $f2
if [ $? -eq 139 ]; then
echo "Compiler gives segmentation fault!!"
rm $f2
rm "ex"
exit 1
fi
if [ -f "Res.txt" ]
then
a=`cat "Res.txt"`
if [ $a -eq "1" ]
then
python3 mapper.py $f2 $f3> $f4
# spim -file $f4
ans=`spim -file $f4`
finalans=`echo "$ans" | tail -n+6`
echo "Output :"
echo "$finalans"
fi
rm "Res.txt"
else
echo "No result file made!"
fi
rm $f2
rm "ex"
------------------------------------------------------------------------------------------------------------
lexical.l
%{
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include "parse.tab.h"
#include "line.h"
int lines;
void despace(char target[], char input[], int l);
void print_error();
int y=1;
%}
sp [ \t]*
id [a-zA-Z][a-zA-Z0-9_]*
pnum ([0-9]+)|([0-9]+)"."([0-9]+)
nnum "-"{pnum}
num {nnum}|{pnum}
%%
{sp}"int"{sp} {y=1;return INT;}
{sp}"float"{sp} {y=1;return FLT;}
{sp}"void"{sp} {y=1;return VOID;}
{sp}"printf"{sp} {y=1;return PRINT;}
{sp}"$$"{sp} {y=1;return DOL;}
{sp}"if"{sp} {y=1;return IF;}
{sp}"else"{sp} {y=1;return ELSE;}
{sp}"for"{sp} {y=1;return FORT;}
{sp}"while"{sp} {y=1;return WHILET;}
{sp}"return"{sp} {y=1;return RET;}
{sp}"switch"{sp} {y=1;return SWITCHT;}
{sp}"break"{sp} {y=1;return BREAK;}
{sp}"default"{sp} {y=1;return DEFAULT;}
{sp}"case"{sp} {y=1;return CASET;}
{sp}{id}{sp} {y=0;char input[1000]; despace(input,yytext,strlen(yytext));strcpy(yylval.vp.vali,input);return ID;}
{sp}{num}{sp} {
char input[1000];
despace(input,yytext,strlen(yytext));
if(y==0)
{
if(input[0]=='-')
{
for(int i=strlen(input)-1;i>=1;i--)
unput(input[i]);
y=1;
return MINUS;
}
}
y=0;
strcpy(yylval.vp.vali,input);
return NUM;
}
{sp}";"{sp} {y=1;return SC;}
{sp}":"{sp} {y=1;return COLON;}
{sp}","{sp} {y=1;return COMMA;}
{sp}"="{sp} {y=1;return EQ;}
{sp}"||"{sp} {y=1;return OR;}
{sp}"&&"{sp} {y=1;return AND;}
{sp}"!"{sp} {y=1;return NOT;}
{sp}"<"{sp} {y=1;return LT;}
{sp}"<="{sp} {y=1;return LTE;}
{sp}">"{sp} {y=1;return GT;}
{sp}">="{sp} {y=1;return GTE;}
{sp}"=="{sp} {y=1;return EQEQ;}
{sp}"!="{sp} {y=1;return NEQ;}
{sp}"+"{sp} {y=1;return PLUS;}
{sp}"-"{sp} {y=1;return MINUS;}
{sp}"*"{sp} {y=1;return MULT;}
{sp}"/"{sp} {y=1;return DIV;}
{sp}"%"{sp} {y=1;return MOD;}
{sp}"("{sp} {y=1;return OPT;}
{sp}")"{sp} {y=0;return CPT;}
{sp}"{"{sp} {y=1;return OCURLY;}
{sp}"}"{sp} {y=1;return CCURLY;}
{sp}"["{sp} {y=1;return OSQ;}
{sp}"]"{sp} {y=1;return CSQ;}
\n {lines++;}
. {}
%%
int yywrap(void) {
return 1;
}
void despace(char target[], char input[], int l){
int start=0, end=l-1;
while(input[start]==' ' || input[start]=='\t') start++;
while(input[end]==' ' || input[end]=='\t') end--;
int y=0;
for (int i = start; i <= end; ++i)
{
target[y++]=input[i];
}
target[y]='\0';
}
void print_error()
{
printf("Invalid Syntax while lexical analysis.\n");
}
-------------------------------------------------------------------------------------------------------------------
line.h
extern int lines;
-------------------------------------------------------------------------------------------------------------------
mapper.py
import sys
def checker(vars, a):
if a in vars :
return a
elif len(a.split('_')) in [3,4]:
if len(a.split('_')) == 4:
return "$a" + a.split('_')[-1]
return a;
else :
return "$"+a
def isfloatreg(a):
if len(a) == 2 and a.startswith('f') and a[1].isdigit():
return True
elif len(a.split('_'))==4:
return True
else:
return False
def iswordreg(a):
if len(a) == 2 and a.startswith('t') and a[1].isdigit():
return True
elif len(a.split('_'))==4:
return True
else:
return False
# --------- all the varialbe declaration here ----------
with open (sys.argv[1], "r") as myfile:
data=myfile.readlines()
print(".data")
vars = []
types = {}
for i in data:
x = i.split('\n')[0].split(',')
print(x[0], end=":")
vars.append(x[0])
if x[2] != "0":
print(" .space "+x[2])
else:
if(x[1] == "int"):
print(" .word 0")
types[x[0]] = "int"
else :
types[x[0]] = "float"
print(" .float 0.0")
print("newline: .asciiz \"\\n\"")
print(".text")
print(".globl main")
# -------- making list of local variables used in each fn---------
with open (sys.argv[2], "r") as myfile:
icode=myfile.readlines()
localvars = {}
for i in icode:
y = i.split('\n')[0].split(' ')
y = list(filter(('').__ne__, y))
if y[1] == "func" and y[2] == "begin":
currentFn = y[3]
localvars[currentFn] = list()
for j in y:
if j.endswith("_" + currentFn) and j not in localvars[currentFn]:
localvars[currentFn].append(j)
# print(localvars)
# ----------------------------------------------------------------
for i in icode:
y = i.split('\n')[0].split(' ')
y = list(filter(('').__ne__, y))
y[0] = 'L'+y[0]
# print(y)
if(len(y) < 2):
continue;
if y[1] != "func":
print(y[0], end=" ")
if(y[1] == "goto"):
y[2] = 'L'+ y[2] # goto statemements
print("b " + y[2], end="")
elif y[1] == "func":
if y[2] == "begin":
counter = 0 # i in $ai initialised to zero.
currentFn = y[3]
print(currentFn + ":", end="")
else:
print(y[0], end=" ")
print("jr $ra")
elif y[1] in ["return", "refparam", "param", "call"]: # func statements
if y[1] == "return":
if len(y)==2:
print("jr $ra", end="")
elif iswordreg(y[2]): # return t0
print("move $v0, " + checker(vars, y[2]))
print("jr $ra", end="")
else: # return f0
print("mfc1 $v0, " + checker(vars, y[2]))
print("jr $ra", end="")
elif y[1] == "refparam":
if iswordreg(y[2]): # refparam t0
print("move "+checker(vars, y[2])+", $v0", end="")
else: # refparam f0
print("mtc1 $v0, "+checker(vars, y[2]), end="")
elif y[1] == "param":
if counter == 0: # if we're on the first param, move the stack
z = ""
size = 108 + len(localvars[currentFn])*4
print("addi $sp, $sp, -" + str(size))
else:
z = str(counter*4)
print("sw $a" + str(counter) + ", " + z + "($sp)") # push the $ai into the stack
if iswordreg(y[2]): # load new value in the $ai
print("move $a" + str(counter) + ", " + checker(vars, y[2]), end="") # param t0
else:
print("mfc1 $a" + str(counter) + ", " + checker(vars, y[2]), end="") # param f0
counter = counter+1
elif y[1] == "call":
#push remaining ai
if counter == 0: # if we're on the first param, move the stack
z = ""
size = 108 + len(localvars[currentFn])*4
print("addi $sp,$sp,-" + str(size))
else:
z = str(counter*4)
for x in range(0, 4-counter):
print("sw $a" + str(counter+x) + ", " + z + "($sp)") # push the $ai into the stack
z = str((counter+x+1)*4)
#push t0-t9
for x in range(10):
print("sw $t" + str(x) + ", " + str(4*(4+x)) + "($sp)") # push the $ti into the stack
#push f0-f9 and f20
for x in range(10):
print("swc1 $f" + str(x) + ", " + str(4*(14+x)) + "($sp)") # push the $ti into the stack
print("swc1 $f20, 96($sp)") # push the $ti into the stack
#push s0
print("sw $s0, 100($sp)") # push the $ti into the stack
#push ra
print("sw $ra, 104($sp)") # push the $ti into the stack
#push all variables in this function to stack
for i, local in enumerate(localvars[currentFn]):
print("lw $t0, " + local)
print("sw $t0, " + str(108 + i*4) + "($sp)") # push the $ti into the stack
print("jal " + y[2].split(',')[0])
# restore all the registers
print("lw $a0, ($sp)")
print("lw $a1, 4($sp)")
print("lw $a2, 8($sp)")
print("lw $a3, 12($sp)")
#load all variables in this function to stack
for i, local in enumerate(localvars[currentFn]):
print("lw $t0, " + str(108 + i*4) + "($sp)") # load the $ti into the stack
print("sw $t0, " + local)
#load ti
for x in range(0,10):
print("lw $t" + str(x) + ", " + str(4*(4+x)) + "($sp)") # restore the $ti from the stack
#load f0-f9 and f20
for x in range(10):
print("lwc1 $f" + str(x) + ", " + str(4*(14+x)) + "($sp)") # load the $fi into the stack
print("lwc1 $f20, 96($sp)") # load the $fi into the stack
#load s0
print("lw $s0, 100($sp)") # load the $s0 into the stack
#load ra
print("lw $ra, 104($sp)") # load the $ra into the stack
# pop !!
size = 108 + len(localvars[currentFn])*4
print("addi $sp, $sp, " + str(size), end="")
counter = 0
elif(y[1].startswith("if")):
# print(y)
a = y[1].split('(')[1]
b = y[3].split(')')[0]
if isfloatreg(a) and isfloatreg(b): # (f0 < f1)
operator = {
"<" : "c.lt.s",
"<=" : "c.le.s",
"==" : "c.eq.s",
">" : "c.lt.s",
">=" : "c.le.s",
"!=" : "c.eq.s",
}
if y[2] in [">", ">="]:
a,b = b,a
print(operator.get(y[2]) + " " + checker(vars, a) + ", " + checker(vars, b)) # if $f2 operator $f4 then code = 1 else code = 0
if y[2]=="!=":
print("bc1f L" + y[-1], end="") # if code == 0 then jump to label
else:
print("bc1t L" + y[-1], end="") # if code == 1 then jump to label
else: # (t0 < t1)
operator = {
"<" : "bltz",
">" : "bgtz",
"<=" : "blez",
">=" : "bgez",
"==" : "beqz",
"!=" : "bnez",
}
if(b[0].isdigit()):
print("li $s0, " + b)
print("sub $s0, " + checker(vars,a) + ", $s0")
else:
print("sub $s0, " + checker(vars,a) + ", " + checker(vars,b))
print(" " + operator.get(y[2]) + " $s0, L" + y[-1], end="") # we're comparing two registers
elif y[1].startswith("print"):
reg = y[1].split(')')[0].split('(')[1]
print("addi $sp, $sp, -8")
print("sw $a0, ($sp)")
print("sw $v0, 4($sp)")
if(isfloatreg(reg)):
print("li $v0, 2 \nmov.s $f12, "+checker(vars, reg)+" \nsyscall") # print float value in reg
else:
print("li $v0, 1 \nmove $a0, "+checker(vars, reg)+" \nsyscall") # print int value in reg
#printing newline
print("li $v0, 4\nla $a0, newline\nsyscall")
print("lw $a0, ($sp)")
print("lw $v0, 4($sp)")
print("addi $sp, $sp, 8", end="")
elif y[1].startswith("Load"):
print("la $"+y[2]+", "+y[3], end="")
else:
if any('[' in x for x in y):
y[1]=y[1]+y[2]+y[3]
a,b = y[1].split('=')
if y[1][-1]==']':
# print("lol")
t1,t2 = b.split('[')
t2 = t2.split(']')[0]
if iswordreg(a): # t0 = t1[t2]
print("add $"+ t1+", $"+t1+", $"+t2)
print("lw $"+a+", ($"+t1+")", end="")
else: # f0 = t1[t2]
print("add $"+ t1+", $"+t1+", $"+t2)
print("l.s $"+a+", ($"+t1+")", end="")
else:
# print("hey")
t1,t2 = a.split('[')
t2 = t2.split(']')[0]
if iswordreg(b):
print("add $"+ t1+", $"+t1+", $"+t2)
print("sw $"+b+", ($"+t1+")", end="")
else:
print("add $"+ t1+", $"+t1+", $"+t2)
print("s.s $"+b+", ($"+t1+")", end="")
elif(len(y) == 4): # assignments
a = y[-3]
b = y[-1]
if(b[0].isdigit() or b[0]=="-"):
if isfloatreg(a) or isfloatreg(b):
print("li.s " + checker(vars,a) + ", " + b, end="")
else:
print("li " + checker(vars,a) + ", " + b, end="")
else:
if b.startswith('ConvertToInt'):
b = b.split('(')[1].split(')')[0]
print("cvt.w.s " + checker(vars, b) + ", " + checker(vars, b)) # "converting float to int"
print("\tmfc1 " + checker(vars, a) + ", " + checker(vars, b), end="")
elif b.startswith('ConvertToFloat'):
b = b.split('(')[1].split(')')[0]
print("mtc1 " + checker(vars, b) + ", " + checker(vars, a))
print("\tcvt.s.w " + checker(vars, a) + ", " + checker(vars, a), end="") # "converting int to float"
elif a in vars:
if isfloatreg(a) or isfloatreg(b):
print("s.s " + checker(vars,b) + ", " + checker(vars,a), end="") # var = f0
else:
print("sw " + checker(vars,b) + ", " + checker(vars,a), end="") # var = t0
else :
if checker(vars,b).startswith("$a"):
if isfloatreg(a):
print("mtc1 " + checker(vars,b) + ", " + checker(vars,a), end="")
else:
print("move " + checker(vars,a) + ", " + checker(vars,b), end="")
elif checker(vars,a).startswith("$a"):
if isfloatreg(b):
print("mfc1 " + checker(vars,a) + ", " + checker(vars,b), end="")
else:
print("move " + checker(vars,a) + ", " + checker(vars,b), end="")
elif isfloatreg(a) and isfloatreg(b):
print("mov.s " + checker(vars,a) + ", " + checker(vars,b), end="") # f0 = f1
elif isfloatreg(a) or isfloatreg(b):
print("l.s " + checker(vars,a) + ", " + checker(vars,b), end="") # f0 = var
else:
if iswordreg(a) and iswordreg(b):
print("move " + checker(vars,a) + ", " + checker(vars,b), end="") # t0 = t1
else:
print("lw " + checker(vars,a) + ", " + checker(vars,b), end="") # t0 = var
else:
# print(y)
a = y[-5]
b = y[-3]
opt = y[-2]
c = y[-1]
# print(y)
operator = {
"+" : "add",
"-" : "sub",
"*" : "mul",
}
x = " "
if isfloatreg(a) or isfloatreg(b):
x = ".s "
if opt in ["+","-","*"]:
print(operator.get(opt) + x + checker(vars,a) + ", " + checker(vars,b) + ", " + checker(vars,c), end="")
else:
if isfloatreg(a) or isfloatreg(b):
print("div.s " + checker(vars, a) + ", " + checker(vars, b) + ", " + checker(vars, c)) # f0 = f1 / f2
else:
print("div " + checker(vars,b) + ", " + checker(vars,c)) # t0 = t1 / t2
if(opt == "%"):
print("mfhi " + checker(vars,a), end="") # quotient
else:
print("mflo " + checker(vars,a), end="") # remainder
print()
-------------------------------------------------------------------------------------------------------------------------
parse.y
%{
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "line.h"
extern FILE * yyin;
void yyerror(char *s);
bool intreg[10];
bool floatreg[10];
int switchglobal;
FILE*fp;
FILE*fil;
int canbreakarr[10][20];
int canbreakcount[10];
struct varrecord
{
char varname[100];
char vartype[100];
char finalname[100];
bool tag;
int level;
bool IsArr;
int dimcount;
int dim[100];
int moddim[100];
};
struct funcrecord
{
char name[100];
char type[100];
struct varrecord paramtable[100];
struct varrecord vartable[100];
int paramcount;
int varcount;
};
struct funcrecord functable[1000];
bool success=true;
int actfuncindex=0;
int canbreak=0;
int callfuncindex;
int globallevel=0;
void releasetemp(int i);
int newtemp();
int InArr(struct varrecord arr[],int size,char finder[]);
bool CheckVar (struct varrecord arr[],int size,char finder[],int level);
void PrintVars(struct varrecord a);
void PrintFuncs(struct funcrecord a);
void despace(char target[], char input[], int l);
void PrintFuncTable();
int stoi(char*s);
int nextquad=1;
char vars[100][100];
char types[100][100];
int sizes[100];
int totvars=0;
%}
%start START
%token SELECT
%token PRINT
%token INT
%token FLT
%token ID
%token SC
%token SP
%token COMMA
%token COLON
%token EQ
%token OR
%token AND
%token NOT
%token LT
%token LTE
%token GT
%token GTE
%token EQEQ
%token NEQ
%token PLUS
%token MINUS
%token MULT
%token DIV
%token MOD
%token OPT
%token CPT
%token OCURLY
%token CCURLY
%token IF
%token ELSE
%token FORT
%token WHILET
%token VOID
%token RET
%token SWITCHT
%token CASET
%token BREAK
%token DEFAULT
%token CSQ
%token OSQ
%token NUM
%token DOL
%union
{
struct attributes{
char vali[1000];
char type[1000];
int arr;
int ind;
int counter;
int countor;
int countand;
bool caseallow;
bool isarray;
int bplist[1000];
int bpcount;
int tempreg;
int quad;
int begin;
int bplist2[1000];
int bpcount2;
} vp;
};
%type<vp> F START INPUT FUNC_DECL FUNC_HEAD BODY RESULT_ID OPT DECLISTE CPT RESULT INT FLT VOID DECLIST COMMA DEC TYPE OCURLY SLIST CCURLY MSLIST S VAR_DECL ASSIGN IFELSE FOR WHILE INCRLEVEL FUNC_CALL SC RETURN SWITCH RET COR PARAMLIST PLIST WHILEXP WHILET MWHILE FOREXP FORT MFOR NFOR FORASSIGN IFEXP NIF MIF ELSE L IDS ARRS ARR ID BRLIST OSQ CSQ NUM EQ CAND OR AND CNOT NOT ECOMP LT LTE GT GTE NEQ EQEQ E PLUS MINUS T MULT DIV MOD SWITCHT CASES CASELIST MCASE DEFAULTE DEFAULT COLON CASE CASET NCASE IDTEMP SWITCHET CASETEMP FORBACK1 FORBACK2 CBODY ARRFUNC LISTFUNC CMARK ARRF ARRFLIST INPUTGLOBAL GLIST MGL NGL DOL
%%
START : INPUTGLOBAL
;
INPUTGLOBAL : MGL GLIST NGL INPUT
| NGL INPUT
;
NGL : {
actfuncindex=1;
}
;
MGL : {
strcpy(functable[0].name,"global");
strcpy(functable[0].type,"int");
}
;
GLIST : GLIST DOL VAR_DECL
| DOL VAR_DECL
;
INPUT : FUNC_DECL INPUT
| FUNC_DECL
;
FUNC_DECL : FUNC_HEAD BODY {
actfuncindex++;
globallevel=0;
char printer[1000];
backpatch($2.bplist,$2.bpcount,nextquad);
snprintf(printer,999,"func end");
GenQuad(printer);
}
| error SC { yyerrok;}
;
FUNC_HEAD : RESULT_ID OPT DECLISTE CPT {
globallevel++;
}
;
RESULT_ID : RESULT ID { functable[actfuncindex].paramcount=0;
functable[actfuncindex].varcount=0;
globallevel++;
strcpy(functable[actfuncindex].name,$2.vali);
char printer[1000];
snprintf(printer,999,"func begin %s",$2.vali);
GenQuad(printer);
}
;
RESULT : INT {strcpy(functable[actfuncindex].type,"int");}
| FLT {strcpy(functable[actfuncindex].type,"float");}
| VOID {strcpy(functable[actfuncindex].type,"void");}
;
DECLISTE : DECLIST
| ;
DECLIST : DECLIST COMMA DEC
| DEC
;
DEC : TYPE ID {
int finder;
finder = InArr(functable[actfuncindex].paramtable,functable[actfuncindex].paramcount,$2.vali);
if(finder!=-1)
{
char printer[1000];
snprintf(printer,999,"Parameter with name %s already declared.",$2.vali);
CallError(printer);
}
else
{
struct varrecord new_record;
strcpy(new_record.varname,$2.vali);
strcpy(new_record.vartype,$1.type);
new_record.tag=false;
new_record.level = globallevel;
new_record.IsArr = false;
new_record.dimcount = 0;
char finalname[1000];
snprintf(finalname,999,"%s_%d_%s_%d",new_record.varname,globallevel,functable[actfuncindex].name,functable[actfuncindex].paramcount);
strcpy(new_record.finalname,finalname);
functable[actfuncindex].paramtable[functable[actfuncindex].paramcount++]=new_record;
}
}
;
DEC : TYPE ARRFUNC {
int finder;
finder = InArr(functable[actfuncindex].paramtable,functable[actfuncindex].paramcount,$2.vali);
if(finder!=-1)
{
char printer[1000];
snprintf(printer,999,"Parameter with name %s already declared.",$2.vali);
CallError(printer);
}
else
{
struct varrecord new_record;
strcpy(new_record.varname,$2.vali);
strcpy(new_record.vartype,$1.type);
new_record.tag=false;
new_record.level = globallevel;
new_record.IsArr = true;
new_record.dimcount = $2.counter;
char finalname[1000];
snprintf(finalname,999,"%s_%d_%s_%d",new_record.varname,globallevel,functable[actfuncindex].name,functable[actfuncindex].paramcount);
strcpy(new_record.finalname,finalname);
functable[actfuncindex].paramtable[functable[actfuncindex].paramcount++]=new_record;
}
}
;
ARRFUNC : ID LISTFUNC {strcpy($$.vali,$1.vali);
$$.counter=$2.counter;}
;
LISTFUNC : LISTFUNC OSQ CSQ {$$.counter=$1.counter+1;}
| OSQ CSQ {$$.counter=1;}
;
BODY : OCURLY SLIST CCURLY {
int counter=0;
int i;
for(i=functable[actfuncindex].varcount-1;i>=0;i--)
{
if(functable[actfuncindex].vartable[i].level==globallevel)
counter++;
}
functable[actfuncindex].varcount -= counter;
globallevel--;
$$.bpcount=0;
for(int i=0;i<$2.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$2.bplist[i];
}
}
;
SLIST : SLIST MSLIST S {
backpatch($1.bplist,$1.bpcount,$2.quad);
$$.bpcount=0;
for(int i=0;i<$3.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$3.bplist[i];
}
}
| S {
$$.bpcount=0;
for(int i=0;i<$1.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$1.bplist[i];
}
}
;
MSLIST : { $$.quad=nextquad;};
S: error SC { yyerrok;}
| VAR_DECL {}
| ASSIGN {}
| IFELSE {
$$.bpcount=0;
int i;
for( i=0;i<$1.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$1.bplist[i];
}
}
| FOR {
$$.bpcount=0;
int i;
for(i=0;i<canbreakcount[canbreak];i++)
{
$$.bplist[$$.bpcount++]=canbreakarr[canbreak][i];
}
canbreakcount[canbreak]=0;
canbreak--;
for( i=0;i<$1.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$1.bplist[i];
}
}
| WHILE {
$$.bpcount=0;
int i;
for(i=0;i<canbreakcount[canbreak];i++)
{
$$.bplist[$$.bpcount++]=canbreakarr[canbreak][i];
}
canbreakcount[canbreak]=0;
canbreak--;
for( i=0;i<$1.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$1.bplist[i];
}
}
| INCRLEVEL BODY {
$$.bpcount=0;
int i;
for( i=0;i<$2.bpcount;i++)
{
$$.bplist[$$.bpcount++]=$2.bplist[i];
}
}
| FUNC_CALL SC {}
| RETURN SC {
}
| SWITCH {
$$.bpcount=0;
int i;
for(i=0;i<canbreakcount[canbreak];i++)
{
$$.bplist[$$.bpcount++]=canbreakarr[canbreak][i];
}
canbreakcount[canbreak]=0;
canbreak--;
for(i=0;i<$1.bpcount;i++){
$$.bplist[$$.bpcount++]=$1.bplist[i];
}
releaseint(switchglobal);
}
| BREAK SC {
if(canbreak==0)
{
CallError("Break can only occur within switch or loops.");
}
char printer[1000];
snprintf(printer,999,"goto _____");
canbreakarr[canbreak][canbreakcount[canbreak]++]=nextquad;
GenQuad(printer);
}
| PRINT OPT COR CPT SC {
char printer[1000];
backpatch($3.bplist,$3.bpcount,nextquad);
if(!strcmp($3.type,"errortype"))
{
CallError("Some error while calling print.");
}
else if(!strcmp($3.type,"int"))
{
snprintf(printer,999,"print(t%d)",$3.tempreg);
GenQuad(printer);
releaseint($3.tempreg);
}
else if(!strcmp($3.type,"float"))
{
snprintf(printer,999,"print(f%d)",$3.tempreg);
GenQuad(printer);
releasefloat($3.tempreg);
}
}
;
INCRLEVEL : {globallevel++;}
;
RETURN : RET {
if(strcmp(functable[actfuncindex].type,"void"))
{
CallWarning("No return value in non-void function.");
}
char printer[1000];
snprintf(printer,999,"return");
GenQuad(printer);
}
| RET COR {
if(!strcmp(functable[actfuncindex].type,"void"))
{
CallWarning("Return value in a void function.");
}
backpatch($2.bplist,$2.bpcount,nextquad);
char printer[1000];
if(!strcmp(functable[actfuncindex].type,"float"))
{
int temp2=$2.tempreg;
if(!strcmp($2.type,"int"))
{
temp2=newfloat();
snprintf(printer,999,"f%d = ConvertToFloat(t%d)",temp2,$2.tempreg);
releaseint($2.tempreg);
GenQuad(printer);
}
snprintf(printer,999,"return f%d",temp2);
GenQuad(printer);
releasefloat(temp2);
}
else
{
int temp2=$2.tempreg;
if(!strcmp($2.type,"float"))
{
temp2=newint();
snprintf(printer,999,"t%d = ConvertToInt(f%d)",temp2,$2.tempreg);
releasefloat($2.tempreg);
GenQuad(printer);
}
snprintf(printer,999,"return t%d",temp2);
GenQuad(printer);
releaseint(temp2);