编译原理-词法分析-语法分析-语义分析生成中间代码-python版

# -*- coding:UTF-8 -*-
#!/usr/bin/python
import string
import sys
import Analyze_2
Identifier=['if','else','for','while','do','int','write','read','']
Delimiter="( ) } { ;"
Operator_1="+-*/"
Operator_2="<>="
def init(FileName):
	i=0
	row=1
	j=0
	Got_char=[]
	Str=''
	file_1=open(FileName,'r')
	file_2=open("analyze_2.txt",'wr')
	fin=file_1.read()
	file_1.close()
	for x in fin:
		Got_char.append(x)
	#judge String -----------------------***************************---------------------
	while i=8:
				file_2.write(Str+' ID '+str(row)+'\n')
			else:
				file_2.write(Str+' '+Str+' '+str(row)+'\n')
			Str=''
			j=0
	#Judge Number ************************--------------------**********************
		elif Got_char[i].isdigit():
			Str+=Got_char[i]
			i+=1
			if  Got_char[i-1]!='0'and Got_char[i].isdigit():
				while Got_char[i].isdigit():
					Str+=Got_char[i]
					i+=1
			file_2.write(Str+' NUM '+str(row)+'\n')
			Str=''
	#Judge Delimiter ---------------------********************--------------
		elif Delimiter.find(Got_char[i])>=0:
			Str+=Got_char[i]
			i+=1
			file_2.write(Str+' '+Str+' '+str(row)+'\n')
			Str=''
	#Judge Operator ********************-----------------------*************
		elif  Operator_1.find(Got_char[i])>=0 and Got_char[i+1]!='*' :
			Str+=Got_char[i]
			i+=1
			file_2.write(Str+' '+Str+' '+str(row)+'\n')
			Str=''
		elif Operator_2.find(Got_char[i])>=0:
			Str+=Got_char[i]
			i+=1
			if Got_char[i]=='=':
				Str+=Got_char[i]
				i+=1
			file_2.write(Str+' '+Str+' '+str(row)+'\n')
			Str=''
		elif Got_char[i]=='!':
			Str+=Got_char[i]
			i+=1
			if Got_char[i]=='=':
				Str+=Got_char[i]
				i+=1
			file_2.write(Str+' '+Str+' '+str(row)+'\n')
			Str=''
	#Judge Comment **************-----------------------------*************
		elif Got_char[i]=='/':
			Str+=Got_char[i]
			i+=1
			if Got_char[i]=='*':
				Str+=Got_char[i]
				i+=1
				while(Got_char[i]!='*'or Got_char[i+1]!='/'):
					Str+=Got_char[i]
					print i,len(Got_char)
					i+=1
					if i+1>=len(Got_char):
						break
				if Got_char[i]=='*'and Got_char[i+1]=='/':
					Str+=Got_char[i]+Got_char[i+1]
					i+=1
					if i>len(Got_char):
						break
					file_2.write(Str+' Comment '+str(row)+'\n')
			Str=''
i=0
row=1
Str=''
Got_char=[]
data={}
addr=0
file_new=open("analyze_3.txt",'wr')
labelp=0
 
  
 
  
# -*- coding:UTF-8 -*-
#!/usr/bin/python
import Analyze_1
from optparse import OptionParser 
def main():
	Parse=OptionParser(
		"-f   Input your TEST Code"+\
		"\n-h For Help")
	Parse.add_option('-f',dest='FileName',type='string',
		help='Please Input your TEST Code whith it ')
	(options,args)=Parse.parse_args()
	if(options.FileName==None):
		print Parse.usage
	else:
		FileName=options.FileName
		Analyze_1.main(FileName)
if __name__ == '__main__':
	main()
 
  
 else :i+=1continuefile_2.close()def main(FileName):init(FileName)Analyze_2.main()if __name__ == '__main__':main(FileName) 
  
 
  
 
  
# -*- coding:UTF-8 -*-
#!/usr/bin/python
import string
import Analyze_1
import globalValues
#i%3 row / i%2 keyword / i%1 type
FOLLOW_declaration_list=['if','while','for','read','write','{','}',';','ID','NUM']
FIRST_statement_list=['if','while','for','read','write','{',';','ID','NUM']
FIRST_bool_expr_1=[">", "<", ">=", "<=", "==", "!="]#fllow(C)
FIRST_expr=['ID','NUM','(']

#@name-def nt
def name_find(new_name):
	flag=0
	for (name,addr) in globalValues.data.items():
		if name == new_name:
			flag=1
			print '[-]Error of id ,plead renew \''+new_name+' \'in Line'+str(globalValues.row)
			break
	if flag == 0 :
		globalValues.data[new_name] = globalValues.addr
		globalValues.addr+=1


def name_lookup(new_name):
	flag=0
	for (name,addr) in globalValues.data.items():
		if name == new_name:
			flag=1
			break
	if flag == 0 :
		return 0
	else:
		return 1


def GET_next_word():
	globalValues.i+=3
	if globalValues.i>=len(globalValues.Got_char) and globalValues.Got_char[globalValues.i]!='}':
		globalValues.file_new.write('      STOP \n')
		exit()


def program():
	if(cmp(globalValues.Got_char[globalValues.i],'{')):
		print "[-]Error : lack of '{' in Line "+str(globalValues.Got_char[globalValues.i-1])
	else:
		GET_next_word()
	declaration_list()
	statement_list()
	print "[+]Finished at the word "+globalValues.Got_char[globalValues.i]+"in Line "+globalValues.Got_char[globalValues.i-1]
	if cmp(globalValues.Got_char[globalValues.i],'}'):
		print "[-]Error : lack of '}' in Line "+str(globalValues.Got_char[globalValues.i-1])
	else:
		GET_next_word()
	globalValues.file_new.write('      STOP \n')
	#first='{'


def declaration_list():
	if cmp(globalValues.Got_char[(globalValues.i+1)],'int')==0 :
		declaration_stat()
		declaration_list()
	elif globalValues.Got_char[globalValues.i+1] in FOLLOW_declaration_list:
		return
	#→ | ε


def statement_list():
	if globalValues.Got_char[globalValues.i+1] in FIRST_statement_list:
		statement()
		statement_list()
	elif globalValues.Got_char[globalValues.i]=='}':
		return
	#→| ε


def declaration_stat():
	if  cmp(globalValues.Got_char[(globalValues.i+1)],'int')==0:
		GET_next_word()
	if cmp(globalValues.Got_char[(globalValues.i+1)],'ID')==0:
		name_find(globalValues.Got_char[(globalValues.i)])
		GET_next_word()
	else:
		print "[-]Error : 'ID' Defiend error in Line "+str(globalValues.Got_char[globalValues.i-1])
		while globalValues.Got_char[globalValues.i+1]!=';':
			GET_next_word()
	if cmp(globalValues.Got_char[(globalValues.i+1)],';')==0:
		GET_next_word()
	else:
		print "[-]Error : lack of ';' in Line "+str(globalValues.Got_char[globalValues.i-1])#last char_row
		return
	#→int ID; *****************************************************************************add vartablep!


def statement():
	if cmp(globalValues.Got_char[globalValues.i+1],'if')==0:
		GET_next_word()
		if_stat()
	elif  cmp(globalValues.Got_char[globalValues.i+1],'while')==0:
		GET_next_word()
		while_stat()
	elif  cmp(globalValues.Got_char[globalValues.i+1],'for')==0 :
		GET_next_word()
		for_stat()
	elif  cmp(globalValues.Got_char[globalValues.i+1],'read')==0:
		GET_next_word()
		read_stat()
	elif  cmp(globalValues.Got_char[globalValues.i+1],'write')==0:
		GET_next_word()
		write_stat()
	elif  cmp(globalValues.Got_char[globalValues.i+1],'{')==0:
		GET_next_word()
		compound_stat()
	elif  globalValues.Got_char[globalValues.i+1] in FIRST_expr or globalValues.Got_char[globalValues.i+1]==';':
		expression_stat()


def if_stat():
	if globalValues.Got_char[globalValues.i+1]=='(':
		GET_next_word()
	else:
		print "[-]Error : Lack of '(' in Line "+ globalValues.Got_char[i-1]
	expression()
	if globalValues.Got_char[globalValues.i+1]==')':
		GET_next_word()
	else:
		print "[-]Error : Lack of ')' in Line "+ globalValues.Got_char[i-1]
	label1 = globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('BRF LABEL%s\n'%label1)
	statement()
	label2 = globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('BR LABEL%s\n'%label2)
	globalValues.file_new.write('LABEL%s:\n'%label1)
	if cmp(globalValues.Got_char[globalValues.i+1],'else')==0 :
		GET_next_word()
		statement()
	globalValues.file_new.write('LABEL%s:\n'%label2)
	# → if () | if () else < statement >


def while_stat():
	label1=globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('LABEL%s:\n'%label1)
	if globalValues.Got_char[globalValues.i+1]=='(':
		GET_next_word()
	else:
		print "[-]Error : Lack of '(' in Line "+ globalValues.Got_char[i-1]
	expression()
	if globalValues.Got_char[globalValues.i+1]==')':
		GET_next_word()
	else:
		print "[-]Error : Lack of ')' in Line "+ globalValues.Got_char[i-1]
	label2 = globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('BRF LABEL%d\n'%label2)
	statement()
	globalValues.file_new.write('BR LABEL%s\n'%label1)
	globalValues.file_new.write('LABEL%s:\n'%label2)
	#  → while () < statement >


def for_stat():
	if globalValues.Got_char[globalValues.i+1]=='(':
		GET_next_word()
	else:
		print "[-]Error : Lack of '(' in Line "+ globalValues.Got_char[globalValues.i-1]
	expression()
	globalValues.file_new.write('      POP\n')
	if globalValues.Got_char[globalValues.i+1] ==';':
		GET_next_word()
	else:
		print "[-]Error : Lack of ';' in Line "+ globalValues.Got_char[globalValues.i-1]
	label1 = globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('LABEL%s:\n'%label1)
	expression()
	label2=globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('      BRF LABEL%s\n'%label2)
	label3 = globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('      BR LABEL%s\n'%label3)
	if globalValues.Got_char[globalValues.i+1]==';':
		GET_next_word()
	else:
		print "[-]Error : Lack of ';' in Line "+ globalValues.Got_char[globalValues.i-1]
	label4 = globalValues.labelp + 1
	globalValues.labelp+=1
	globalValues.file_new.write('LABEL%s:\n'%label4)
	expression()
	globalValues.file_new.write('      POP\n')
	globalValues.file_new.write('      BR LABEL%s\n'%label1)
	if globalValues.Got_char[globalValues.i+1] ==')':
		GET_next_word()
	else:
		print "[-]Error : Lack of ')' in Line "+ globalValues.Got_char[globalValues.i-1]
	globalValues.file_new.write('LABEL%s:\n'%label3)
	statement()
	globalValues.file_new.write('      BR LABEL%s\n'%label4)
	globalValues.file_new.write('LABEL%s:\n'%label2)
	# → for (;;)


def read_stat():
	if globalValues.Got_char[globalValues.i+1]=='ID':
		GET_next_word()
	else:
		print "[-]Error : Lack of 'ID' in Line "+globalValues.Got_char[globalValues.i-1]
	globalValues.file_new.write('      IN      \n')
	globalValues.file_new.write('      STO %s\n'%globalValues.data[globalValues.Got_char[globalValues.i-3]])
	globalValues.file_new.write('      POP\n')
	if globalValues.Got_char[globalValues.i+1]==';':
		GET_next_word()
	else:
		print "[-]Error : Lack of ';' in Line "+globalValues.Got_char[globalValues.i-1]
	#  →read ID;


def write_stat():
	expression()
	if globalValues.Got_char[globalValues.i+1]!=';':
		print "[-]Error : Lack of ';' in Line "+ globalValues.Got_char[globalValues.i-1]
	globalValues.file_new.write('      OUT\n')
	# →write ;


def compound_stat():
	statement_list()
	if(globalValues.Got_char[globalValues.i+1]=='}'):
		GET_next_word()
	else:
		print "[-]Error : Lack of '}' in Line of "+ globalValues.Got_char[globalValues.i-1]
	# →{} 


def expression_stat():
	if globalValues.Got_char[globalValues.i+1]==';':
		GET_next_word()
	else:
		expression()
		globalValues.file_new.write('      POP\n')
		if globalValues.Got_char[globalValues.i+1]==';':
			GET_next_word()
		else:
			print "[-]Error : Lack of ';' in Line "+globalValues.Got_char[globalValues.i-1]
	# →< expression >;|; 


def expression():
	if globalValues.Got_char[globalValues.i+1]=='ID':
		GET_next_word()
		if globalValues.Got_char[globalValues.i+1]=='=':
			if name_lookup(globalValues.Got_char[globalValues.i-3]) == 0:
				return
			tmp = globalValues.data[globalValues.Got_char[globalValues.i-3]]
			GET_next_word()
			bool_expr()
			globalValues.file_new.write('      STO %s\n'%tmp)
		else:
			globalValues.i-=3
			bool_expr()
	else:
		bool_expr()
	#< expression > → ID=| 


def bool_expr():
	if globalValues.Got_char[globalValues.i+1] in FIRST_expr:
		additive_expr()
		additive_expr_E()
	# →E 


def additive_expr_E():
	if globalValues.Got_char[globalValues.i+1] in FIRST_bool_expr_1:
		GET_next_word()
		additive_expr()
		if globalValues.Got_char[globalValues.i-6] == '>':
			globalValues.file_new.write('      GT\n')
		if globalValues.Got_char[globalValues.i-6] == '>=':
			globalValues.file_new.write('      GE\n')
		if globalValues.Got_char[globalValues.i-6] == '<':
			globalValues.file_new.write('      LES\n')
		if globalValues.Got_char[globalValues.i-6] == '<=':
			globalValues.file_new.write('      LE\n')
		if globalValues.Got_char[globalValues.i-6] == '==':
			globalValues.file_new.write('      EQ\n')
		if globalValues.Got_char[globalValues.i-6] == '!=':
			globalValues.file_new.write('      NOTEQ\n')
	elif globalValues.Got_char[globalValues.i+1] ==';'or globalValues.Got_char[globalValues.i+1]==')':
		return
	#E→ε|(>|<|>=|<=|==|!=)< additive_expr > 
	#fllow=


def term():
	if globalValues.Got_char[globalValues.i+1] in FIRST_expr:
		factor()
		factor_D()
		#< term > →< factor >D ,


def additive_expr():
	if globalValues.Got_char[globalValues.i+1] in FIRST_expr:
		term()
		term_C()
	else:
		print "[-]Error : There is an error of \'expression\' in Line "+globalValues.Got_char[globalValues.i-1]
	#< additive_expr> →< term >C 


def term_C():
	if globalValues.Got_char[globalValues.i+1] =='+' or globalValues.Got_char[globalValues.i+1]=='-':
		if globalValues.Got_char[globalValues.i] == '+':
			globalValues.file_new.write('      ADD\n')
		else:
			globalValues.file_new.write('      SUB\n')
		GET_next_word()
		term()
		term_C()
	elif globalValues.Got_char[globalValues.i+1]==';'or globalValues.Got_char[globalValues.i+1]==')' or globalValues.Got_char[globalValues.i+1] in FIRST_bool_expr_1:
		return
	#C →+C|-C|ε
	#Follow(C)={;, ), (>|<|>=|<=|==|!=)}


def factor():
	if globalValues.Got_char[globalValues.i+1] =='(':
		GET_next_word()
		expression()
		if globalValues.Got_char[globalValues.i+1] ==')':
			GET_next_word()
		else:
			print "[-]Error : Lack of ')' in Line "+globalValues.Got_char[globalValues.i-1]
	elif globalValues.Got_char[globalValues.i+1] =='ID'or globalValues.Got_char[globalValues.i+1] =='NUM':
		if globalValues.Got_char[globalValues.i+1] == 'ID':
			globalValues.file_new.write('      LOAD %s\n'%globalValues.data[globalValues.Got_char[globalValues.i]])
		else :
			globalValues.file_new.write('      LOADI %s\n'%globalValues.Got_char[globalValues.i])
		GET_next_word()
	#< factor > →(< expression >)|ID|NUM


def factor_D():
	if globalValues.Got_char[globalValues.i+1]=='*'or globalValues.Got_char[globalValues.i+1]=='/':
		if globalValues.Got_char[globalValues.i] == '*':
			globalValues.file_new.write('      MULT\n')
		else:
			globalValues.file_new.write('      DIV\n')
		GET_next_word()
		factor()
		factor_D()
	elif globalValues.Got_char[globalValues.i+1]==';'or globalValues.Got_char[globalValues.i+1] ==')' or globalValues.Got_char[globalValues.i+1] in FIRST_bool_expr_1:
		return
	# D →*D|/D|ε


def main():
	file=open("analyze_2.txt",'r')
	fin=file.read()
	for x in fin:
		if x!=' ' and x!='\n':
			globalValues.Str+=x
		else:
			globalValues.Got_char.append(globalValues.Str)
			globalValues.Str=''
	globalValues.Got_char.append('')
	globalValues.Got_char.append('')
	globalValues.Got_char.append('')
	#prevent out of index
	program()


if __name__ == '__main__':
	main()