184 lines
3.6 KiB
C++
184 lines
3.6 KiB
C++
#ifndef __LEXER_H__
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#define __LEXER_H__
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#include <iostream>
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#include <fstream>
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#include <cstring>
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#include "nasal.h"
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#include "process_stack.h"
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using namespace nasal;
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std::string text;
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process_stack _test;
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process_stack_unit _unit;
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void PrintProcess(std::string content)
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{
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std::string Sentence="";
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int len=(int)content.length();
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for(int i=0;i<len;++i)
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{
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if(content[i]==',')
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Sentence="";
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else if(content[i]=='\"')//string mode
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{
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Sentence="";
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for(int j=i+1;j<len;++j)
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{
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if(content[j]=='\\' && j+1<len)
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{
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Sentence+=content[j];
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Sentence+=content[j+1];
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++j;
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}
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else if(content[j]=='\"')
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{
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i=j;
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break;
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}
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else
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Sentence+=content[j];
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}
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PrintString(Sentence);
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}
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else if(content[i]!=' ' && content[i]!='\"' && content[i]!=',')//check var
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{
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Sentence="";
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for(int j=i;j<len;++j)
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{
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if(content[j]!=' ' && content[j]!='\"' && content[j]!=',')
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Sentence+=content[j];
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if(content[j]==',' || content[j]==' ' || j==len-1)
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{
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i=j;
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break;
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}
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}
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if(_test.check_stack(Sentence))
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{
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_test.stack_content_print(Sentence);
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}
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else
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std::cout<<std::endl<<"[Error] "<<Sentence<<" is not declared in this scope."<<std::endl;
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}
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}
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std::cout<<std::endl;
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return;
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}
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void FileProcess(const char *FileName)
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{
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std::ifstream fin(FileName);
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fin.close();
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return;
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}
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void CommandProcess()
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{
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while(1)
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{
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std::cout<<">> ";
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std::getline(std::cin,text);
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int len=(int)text.length();
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int sharpDetected=0;
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for(int i=len-1;i>=0;--i)
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{
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if(text[i]=='#')
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{
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//ignore sharp
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len=i;
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sharpDetected=i;
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}
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if(text[i]==';')
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{
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len=i+1;
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//find the real end of the sentence
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if(sharpDetected)
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{
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for(int j=sharpDetected-1;j>=len;--j)
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if(text[j]!=' ')
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{
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len=j+1;
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break;
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}
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}
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else
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{
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for(int j=(int)text.length()-1;j>=len;--j)
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if(text[j]!=' ')
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{
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len=j+1;
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break;
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}
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}
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break;
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}
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}
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if(text[len-1]==';')
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{
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for(int i=0;i<len;++i)
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{
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if(text[i]=='p' && i+1<len && text[i+1]=='r' && i+2<len && text[i+2]=='i' && i+3<len && text[i+3]=='n' && i+4<len && text[i+4]=='t')
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{
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//In this part every error leads to an error information and breaks the loop!
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//check the first char after print is '(' or not
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int string_beg=len-1;
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for(int j=i+5;j<len;++j)
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if(text[j]!=' ')
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{
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string_beg=j;
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break;
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}
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if(text[string_beg]!='(')
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{
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std::cout<<std::endl<<"[Error] Missing \'(\' ."<<std::endl;
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break;
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}
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//check the ')' and the place
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int string_end=len-1;
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for(int j=len-2;j>=0;--j)
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if(text[j]!=' ')
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{
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string_end=j;
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break;
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}
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if(text[string_end]!=')')
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{
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std::cout<<std::endl<<"[Error] Missing \')\' ."<<std::endl;
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break;
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}
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std::string content="";
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for(int j=string_beg+1;j<string_end;++j)
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content+=text[j];
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std::cout<<std::endl<<"Target string: "<<content<<std::endl;
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PrintProcess(content);
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break;
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}
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else if(text[i]=='v' && i+1<len && text[i+1]=='a' && i+2<len && text[i+2]=='r')
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{
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;
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}
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else if(i==len-1)
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std::cout<<std::endl<<"[Error] Incorrect command."<<std::endl;
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}
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}
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else
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{
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std::cout<<std::endl<<"[Error] Expected \';\' after this line."<<std::endl;
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}
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}
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return;
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}
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#endif
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