C语言词法分析器-源代码-风君版.doc

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命运如同手中的掌纹，无论多曲折，终掌握在自己手中
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C语言词法分析器 源代码 风君版.txt婚姻是键盘，太多秩序和规则；爱情是鼠标，一点就通。男人自比主机，内存最重要；女人好似显示器，一切都看得出来。#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char *key0[]={" ","auto","break","case","char","const","continue","default","do","double","else","enum","extern","float","for","goto","if","int","long","register","return","short","signed","sizeof","static","struct","switch","typedef","_Complex","_Imaginary","union","unsigned","void","volatile","while"};
/*保留字表*/
char *key1[]={" ","(",")","[","]","{","}",",",";","'"};
/*分隔符表*/
char *key2[]={" ","+","-","*","/","%","<",">","==",">=","<=","!=","!","&&","||","<<",">>","~","|","^","&","=","?:","->","++","--",".","+=","-=","*=","/="};
/*运算符表*/
int xx0[35],xx1[10],xx2[31];

int temp_key3=0,temp_c40=0,temp_c41=0,temp_c42=0,temp_c43=0;

/******* 初始化函数 *******/

void load()
{
int mm;
for (mm=0;mm<=34;mm++)
{
xx0[mm]=0;
}
for (mm=0;mm<=9;mm++)
{
xx1[mm]=0;
}
for (mm=0;mm<=30;mm++)
{
xx2[mm]=0;
}
FILE *floading;
if ((floading=fopen("key0.txt","w"))==NULL)
{
printf("Error! Can't create file : key0.txt");
return;
}
fclose (floading);
/*建立保留字表文件：key0.txt*/
if ((floading=fopen("key1.txt","w"))==NULL)
{
printf("Error! Can't create file : key1.txt");
return;
}
/*建立分隔符表文件：key1.txt*/
if ((floading=fopen("key2.txt","w"))==NULL)
{
printf("Error! Can't create file : key2.txt");
return;
}
fclose(floading);
/*建立运算符表文件：key2.txt*/
if ((floading=fopen("key3.txt","w"))==NULL)
{
printf("Error! Can't create file : key3.txt");
return;
}
fclose (floading);
/*建立标识符表文件：key3.txt*/
if ((floading=fopen("c40.txt","w"))==NULL)
{
printf("Error! Can't create file : c40.txt");
return;
}
fclose (floading);
/*建立整数类型常量表文件：c40.txt*/
if ((floading=fopen("c41.txt","w"))==NULL)
{
printf("Error! Can't create file : c41.txt");
return;
}
fclose (floading);
/*建立浮点类型常量表文件：c41.txt*/
if ((floading=fopen("c42.txt","w"))==NULL)
{
printf("Error! Can't create file : c42.txt");
return;
}
fclose (floading);
/*建立字符类型常量表文件：c42.txt*/
if ((floading=fopen("c43.txt","w"))==NULL)
{
printf("Error! Can't create file : c43.txt");
return;
}
fclose (floading);
/*建立字符串类型常量表文件：c43.txt*/
if ((floading=fopen("defination.txt","w"))==NULL)
{
printf("Error! Can't create file : defination.txt");
return;
}
fclose (floading);
/*建立注释文件：defination.txt*/
if ((floading=fopen("output.txt","w"))==NULL)
{
printf("Error! Can't create file : output.txt");
return;
}
fclose (floading);
/*建立内部码文件：output.txt*/
if ((floading=fopen("temp_key1","w"))==NULL)
{
printf("Error! Can't create file : temp_key1");
return;
}
fclose (floading);
/*建立保留字临时表文件：temp_key1*/
if ((floading=fopen("temp_key3","w"))==NULL)
{
printf("Error! Can't create file : temp_key3");
return;
}
fclose (floading);
/*建立标识符临时文件：temp_key3*/
if ((floading=fopen("temp_c40","w"))==NULL)
{
printf("Error! Can't create file : temp_c40");
return;
}
fclose (floading);
/*建立整数类型常量临时文件：temp_c40*/
if ((floading=fopen("temp_c41","w"))==NULL)
{
printf("Error! Can't create file : temp_c41");
return;
}
fclose (floading);
/*建立浮点类型常量临时文件：temp_c41*/
if ((floading=fopen("temp_c42","w"))==NULL)
{
printf("Error! Can't create file : temp_c42");
return;
}
fclose (floading);
/*建立字符类型常量临时文件：temp_c42*/
if ((floading=fopen("temp_c43","w"))==NULL)
{
printf("Error! Can't create file : temp_c43");
return;
}
fclose (floading);
/*建立字符串类型常量临时文件：temp_c43*/
}

/******* 保留字及标识符判断函数 *******/

void char_search(char *word)
{
int m,line=0,csi=0;
int value=0;
int value2=0;
char c,cs[100];
FILE *foutput,*finput;
for (m=1;m<=34;m++)
{
if (strcmp(word,key0[m])==0)
{
value=1;
break;
}
}
if (value==1)
{
if (xx0[m]==0)
{
foutput=fopen("key0.txt","a");
fprintf(foutput,"0\t%d\t\t%s\n",m,word);
fclose(foutput);
xx0[m]=1;
}
foutput=fopen("output.txt","a");
fprintf(foutput,"0\t%d\t\t%s\n",m,word);
fclose(foutput);
}
else
{
if (temp_key3==0)
{
foutput=fopen("temp_key3","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_key3++;
foutput=fopen("key3.txt","a");
fprintf(foutput,"3\t1\t\t%s\n",word);
fclose(foutput);
}
finput=fopen("temp_key3","r");
c=fgetc(finput);
while (c!=EOF)
{
while (c!='\n')
{
cs[csi++]=c;
c=fgetc(finput);
}
cs[csi]='\0';
csi=0;
line++;
if ((strcmp(cs,word))==0)
{
value2=1;
break;
}
else
{
value2=0;
c=fgetc(finput);
}
}
fclose(finput);
if (value2==1)
{
foutput=fopen("output.txt","a");
fprintf(foutput,"3\t%d\t\t%s\n",line,word);
fclose(foutput);
}
else
{
foutput=fopen("temp_key3","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_key3++;
foutput=fopen("output.txt","a");
fprintf(foutput,"3\t%d\t\t%s\n",temp_key3,word);
fclose(foutput);
foutput=fopen("key3.txt","a");
fprintf(foutput,"3\t%d\t\t%s\n",temp_key3,word);
fclose(foutput);
}
}
}

/******* 整数类型判断函数 *******/

void inta_search(char *word)
{
FILE *foutput,*finput;
char c;
char cs[100];
int csi=0;
int line=0;
int value2=0;
if (temp_c40==0)
{
foutput=fopen("temp_c40","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c40++;
foutput=fopen("c40.txt","a");
fprintf(foutput,"4\t0\t1\t%s\n",word);
fclose(foutput);
}
finput=fopen("temp_c40","r");
c=fgetc(finput);
while (c!=EOF)
{
while (c!='\n')
{
cs[csi++]=c;
c=fgetc(finput);
}
cs[csi]='\0';
csi=0;
line++;
if (strcmp(cs,word)==0)
{
value2=1;
break;
}
c=fgetc(finput);
}
fclose(finput);
if (value2==1)
{
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t0\t%d\t%s\n",line,word);
fclose(foutput);
}
else
{
foutput=fopen("temp_c40","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c40++;
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t0\t%d\t%s\n",temp_c40,word);
fclose(foutput);
foutput=fopen("c40.txt","a");
fprintf(foutput,"4\t0\t%d\t%s\n",temp_c40,word);
fclose(foutput);
}
}

/******* 浮点类型判断函数 *******/

void intb_search(char *word)
{
FILE *foutput,*finput;
char c;
char cs[100];
int csi=0;
int line=0;
int value2=0;
if (temp_c41==0)
{
foutput=fopen("temp_c41","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c41++;
foutput=fopen("c41.txt","a");
fprintf(foutput,"4\t1\t1\t%s\n",word);
fclose(foutput);
}
finput=fopen("temp_c41","r");
c=fgetc(finput);
while (c!=EOF)
{
while (c!='\n')
{
cs[csi++]=c;
c=fgetc(finput);
}
cs[csi]='\0';
csi=0;
line++;
if (strcmp(cs,word)==0)
{
value2=1;
break;
}
c=fgetc(finput);
}
fclose(finput);
if (value2==1)
{
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t1\t%d\t%s\n",line,word);
fclose(foutput);
}
else
{
foutput=fopen("temp_c41","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c41++;
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t1\t%d\t%s\n",temp_c41,word);
fclose(foutput);
foutput=fopen("c40.txt","a");
fprintf(foutput,"4\t1\t%d\t%s\n",temp_c41,word);
fclose(foutput);
}
}

/******* 字符串常量判断函数 *******/

void cc_search(char *word)
{
FILE *foutput,*finput;
char c;
char cs[100];
int csi=0;
int line=0;
int value2=0;
if (temp_c43==0)
{
foutput=fopen("temp_c43","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c43++;
foutput=fopen("c43.txt","a");
fprintf(foutput,"4\t3\t1\t%s\n",word);
fclose(foutput);
}
finput=fopen("temp_c43","r");
c=fgetc(finput);
while (c!=EOF)
{
while (c!='\n')
{
cs[csi++]=c;
c=fgetc(finput);
}
cs[csi]='\0';
csi=0;
line++;
if (strcmp(cs,word)==0)
{
value2=1;
break;
}
c=fgetc(finput);
}
fclose(finput);
if (value2==1)
{
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t3\t%d\t%s\n",line,word);
fclose(foutput);
}
else
{
foutput=fopen("temp_c43","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c43++;
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t3\t%d\t%s\n",temp_c43,word);
fclose(foutput);
foutput=fopen("c43.txt","a");
fprintf(foutput,"4\t3\t%d\t%s\n",temp_c43,word);
fclose(foutput);
}
}

/******* 字符常量判断函数 *******/

void c_search(char *word)
{
FILE *foutput,*finput;
char c;
char cs[100];
int csi=0;
int line=0;
int value2=0;
if (temp_c42==0)
{
foutput=fopen("temp_c42","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c42++;
foutput=fopen("c42.txt","a");
fprintf(foutput,"4\t2\t1\t%s\n",word);
fclose(foutput);
}
finput=fopen("temp_c42","r");
c=fgetc(finput);
while (c!=EOF)
{
while (c!='\n')
{
cs[csi++]=c;
c=fgetc(finput);
}
cs[csi]='\0';
csi=0;
line++;
if (strcmp(cs,word)==0)
{
value2=1;
break;
}
c=fgetc(finput);
}
fclose(finput);
if (value2==1)
{
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t2\t%d\t%s\n",line,word);
fclose(foutput);
}
else
{
foutput=fopen("temp_c42","a");
fprintf(foutput,"%s\n",word);
fclose(foutput);
temp_c42++;
foutput=fopen("output.txt","a");
fprintf(foutput,"4\t2\t%d\t%s\n",temp_c42,word);
fclose(foutput);
foutput=fopen("c42.txt","a");
fprintf(foutput,"4\t2\t%d\t%s\n",temp_c42,word);
fclose(foutput);
}
}

/******* 主扫描函数 *******/

void scan()
{
int count;
char chin;
FILE *fin;
FILE *fout;
char filename[50];
char temp[100];
char target[3]="'";
printf("请输入文件名：");
scanf("%s",filename);
if ((fin=fopen(filename,"r"))==NULL)
{
printf("Error! Can't open file : %s\n",filename);
return;
}
chin=fgetc(fin);
while (chin!=EOF)
{
/*对文件包含、宏定义进行处理*/
if (chin=='#')
{
while (chin!='>')
chin=fgetc(fin);
/*chin=fgetc(fin);*/
}
/*对空格符、水平制表符进行处理*/
else if ((chin==' ')||(chin=='\t'))
{
;
}
/*对回车符进行处理*/
else if (chin=='\n')
{
;
}
/*对单引号内的字符常量进行处理*/
else if (chin==target[0])
{
if (xx1[9]==0)
{
fout=fopen("key1.txt","a");
fprintf(fout,"1\t9\t\t%c\n",target[0]);
fclose(fout);
xx1[9]=1;
}
temp[0]=chin;
chin=fgetc(fin);
temp[1]=chin;
chin=fgetc(fin);
if (chin!=target[0])
{
temp[2]=chin;
chin=fgetc(fin);
temp[3]=chin;
temp[4]='\0';
}
else
{
temp[2]=chin;
temp[3]='\0';
}
c_search(temp);
}
/*对双引号内的字符串常量进行处理*/
else if (chin=='"')
{
int i=0;
temp[i++]='"';
chin=fgetc(fin);
while (chin!='"')
{
temp[i++]=chin;
chin=fgetc(fin);
}
temp[i]='"';
temp[i+1]='\0';
cc_search(temp);
}
/*对保留字、标识符进行处理*/
else if (((chin>='A')&&(chin<='Z'))||((chin>='a')&&(chin<='z'))||(chin=='_'))
{
int i=0;
while (((chin>='A')&&(chin<='Z'))||((chin>='a')&&(chin<='z'))||(chin=='_')||((chin>='0')&&(chin<='9')))
{
temp[i++]=chin;
chin=fgetc(fin);
}
temp[i]='\0';
char_search(temp);
if (chin!=EOF)
fseek (fin,-1L,SEEK_CUR);
}
/*对整型、浮点型数据进行处理*/
else if ((chin>='0')&&(chin<='9'))
{
int dotcount=0;
int i=0;
while (((chin>='0')&&(chin<='9'))||(chin=='.'))
{
if (chin=='.')
dotcount++;
if (dotcount==2)
break;
temp[i++]=chin;
chin=fgetc(fin);
}
temp[i]='\0';
if (dotcount==1)
intb_search(temp);
else
inta_search(temp);
if (chin!=EOF)
fseek (fin,-1L,SEEK_CUR);
}
/*对注释进行处理*/
else if (chin=='/')
{
chin=fgetc(fin);
if (chin=='=')
{
fout=fopen("output.txt","a");
fprintf(fout,"2\t30\t\t/=\n");
fclose(fout);
}
else if (chin!='*')
{
fout=fopen("output.txt","a");
fprintf(fout,"2\t4\t\t/\n");
fclose(fout);
fseek(fin,-1L,SEEK_CUR);
}
else if (chin=='*')
{
count=0;
chin=fgetc(fin);
fout=fopen("defination.txt","a");
fprintf(fout,"/*");
while (count!=2)
{
count=0;
while (chin!='*')
{
fprintf(fout,"%c",chin);
chin=fgetc(fin);
}
count++;
fprintf(fout,"%c",chin);
chin=fgetc(fin);
if (chin=='/')
{
count++;
fprintf(fout,"%c\n",chin);
}
else
{
fprintf(fout,"%c",chin);
chin=fgetc(fin);
}
}
}
}
/*对运算符、分隔符进行处理*/
else
{
int time=0;
int firstblood=0;
temp[0]=chin;
chin=fgetc(fin);
if (chin!=EOF)
{
temp[1]=chin;
temp[2]='\0';
for (time=1;time<=30;time++)
{
if (strcmp(temp,key2[time])==0)
{
firstblood=1;
if (xx2[time]==0)
{
fout=fopen("key2.txt","a");
fprintf(fout,"2\t%d\t\t%s\n",time,temp);
fclose(fout);
xx2[time]=1;
}
fout=fopen("output.txt","a");
fprintf(fout,"2\t%d\t\t%s\n",time,temp);
fclose(fout);
break;
}
}
if (firstblood!=1)
{
fseek(fin,-1L,SEEK_CUR);
temp[1]='\0';
for (time=1;time<=9;time++)
{
if (strcmp(temp,key1[time])==0)
{
if (xx1[time]==0)
{
fout=fopen("key1.txt","a");
fprintf(fout,"1\t%d\t\t%s\n",time,temp);
fclose(fout);
xx1[time]=1;
}
fout=fopen("output.txt","a");
fprintf(fout,"1\t%d\t\t%s\n",time,temp);
fclose(fout);
break;
}
}
for (time=1;time<=30;time++)
{
if (strcmp(temp,key2[time])==0)
{
if (xx2[time]==0)
{
fout=fopen("key2.txt","a");
fprintf(fout,"2\t%d\t\t%s\n",time,temp);
fclose(fout)