analyze.cpp

这是一个linux下的Shell.有命令历史和命令提示

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <malloc.h>
#include "Analyze.h"

int IsLegal(char* CheckWord)
{
	char* KeyWords[]={"auto","break","case","char","continue","const","default",
		   "do","double","else","enum","extern","float","for","goto",
		   "if","int","long","noalias","register","return","short",
		   "signed","sizeof","static","struct","switch","typedef",
		   "union","unsigned","void","volatile","while","defined",
		   "define","undef","include","ifdef","ifndef","endif","line",
		   "error","elif","pragma"};/*lover keyword list*/
	char* Functions[]={"close","creat","eof","fclose","fcloseall","feof","fopen",
			"ferror","fgetchar","fgets","fprintf","fputc","fputchar",
			"fseek","get","putch","putc","printf","open","putchar",
			"puts","read","scanf","abs","acos","asin","math","atan",
			"atan2","atof","atoi","atol","ceil","dos","cosh","ecvt",
			"exp","fabs","floor","fmod","frexp","itoa","labs","ldexp",
			"log","log10","modf","pow","rand","sin","sqrt","srand",
			"strtod","strlol","tan","tanh","ultoa","memset","strcpy",
			"struct","strchr","strcmp","calloc","isalnum","isalpha",
			"toascii","tolower","tollpper","exit"};/*lover function list*/
	int WordLength,i;
  	char* WordTemp;

  	WordTemp = new char[32 *sizeof(char)];
  	if( !WordTemp ) return 5;

  	WordLength=strlen(CheckWord);

  	if(isalpha(CheckWord[0])==0)
		return 1;
  	for(i=0;i<WordLength;i++) 
    	if((isalnum(CheckWord[i])==0))
      		return 2;
  	for(i=0;i<44;i++)
  	{
    	if(!strcmp(CheckWord,KeyWords[i]))
      		return 3;
  	}
  	i=0;
  	for(i=0;i<69;i++)
  	{
    	if(!strcmp(CheckWord,Functions[i]))
      		return 4;
  	}

  	delete WordTemp;
  	return 0;
}