1056 lines
29 KiB
C++
1056 lines
29 KiB
C++
//---------------------------------------------------------------------------
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#include "tokenize.h"
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#include "CommonCheck.h" // <- IsName
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//---------------------------------------------------------------------------
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#include <locale>
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#include <fstream>
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#include <map>
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#include <string>
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#include <cstring>
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#include <stdlib.h> // <- strtoul
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#include <stdio.h>
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#ifdef __BORLANDC__
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#include <mem.h>
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#endif
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//---------------------------------------------------------------------------
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// Helper functions..
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static void Define(const char Name[], const char Value[]);
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static void addtoken(const char str[], const unsigned int lineno, const unsigned int fileno);
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static void combine_2tokens(TOKEN *tok, const char str1[], const char str2[]);
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static void DeleteNextToken(TOKEN *tok);
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static TOKEN *_gettok(TOKEN *tok, int index)
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{
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while (tok && index>0)
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{
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tok = tok->next;
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index--;
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}
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return tok;
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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std::vector<std::string> Files;
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struct TOKEN *tokens, *tokens_back;
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Defined symbols.
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// "#define abc 123" will create a defined symbol "abc" with the value 123
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//---------------------------------------------------------------------------
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struct DefineSymbol
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{
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char *name;
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char *value;
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struct DefineSymbol *next;
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};
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static struct DefineSymbol * dsymlist;
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static void Define(const char Name[], const char Value[])
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{
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if (!(Name && Name[0]))
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return;
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if (!(Value && Value[0]))
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return;
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// Is 'Value' a decimal value..
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bool dec = true, hex = true;
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for (int i = 0; Value[i]; i++)
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{
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if ( ! std::isdigit(Value[i]) )
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dec = false;
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if ( ! std::isxdigit(Value[i]) && (!(i==1 && Value[i]=='x')))
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hex = false;
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}
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if (!dec && !hex)
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return;
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char *strValue = strdup(Value);
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if (!dec && hex)
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{
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char str[50];
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unsigned long value = strtoul(Value+2, NULL, 16);
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free(strValue);
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sprintf(str, "%lu", value);
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strValue = strdup(str);
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}
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DefineSymbol *NewSym = new DefineSymbol;
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memset(NewSym, 0, sizeof(DefineSymbol));
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NewSym->name = strdup(Name);
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NewSym->value = strValue;
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NewSym->next = dsymlist;
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dsymlist = NewSym;
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// addtoken
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// add a token. Used by 'Tokenizer'
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//---------------------------------------------------------------------------
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static void addtoken(const char str[], const unsigned int lineno, const unsigned int fileno)
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{
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if (str[0] == 0)
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return;
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// Replace hexadecimal value with decimal
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char str2[50];
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memset(str2, 0, sizeof(str2));
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if (strncmp(str,"0x",2)==0)
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{
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unsigned int value = strtoul(str+2, NULL, 16);
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sprintf( str2, "%d", value );
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}
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TOKEN *newtoken = new TOKEN;
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memset(newtoken, 0, sizeof(TOKEN));
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newtoken->str = strdup(str2[0] ? str2 : str);
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newtoken->linenr = lineno;
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newtoken->FileIndex = fileno;
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if (tokens_back)
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{
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tokens_back->next = newtoken;
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tokens_back = newtoken;
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}
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else
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{
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tokens = tokens_back = newtoken;
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}
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// Check if str is defined..
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for (DefineSymbol *sym = dsymlist; sym; sym = sym->next)
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{
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if (strcmp(str,sym->name)==0)
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{
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free(newtoken->str);
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newtoken->str = strdup(sym->value);
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break;
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}
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}
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// combine_2tokens
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// Combine two tokens that belong to each other. Ex: "<" and "=" may become "<="
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//---------------------------------------------------------------------------
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static void combine_2tokens(TOKEN *tok, const char str1[], const char str2[])
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{
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if (!(tok && tok->next))
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return;
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if (strcmp(tok->str,str1) || strcmp(tok->next->str,str2))
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return;
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free(tok->str);
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tok->str = (char *)malloc(strlen(str1)+strlen(str2)+1);
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strcpy(tok->str, str1);
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strcat(tok->str, str2);
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DeleteNextToken(tok);
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// SizeOfType - gives the size of a type
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//---------------------------------------------------------------------------
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std::map<std::string, unsigned int> TypeSize;
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int SizeOfType(const char type[])
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{
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if (!type)
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return 0;
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return TypeSize[type];
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// DeleteNextToken. Unlink and delete next token.
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//---------------------------------------------------------------------------
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static void DeleteNextToken(TOKEN *tok)
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{
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TOKEN *next = tok->next;
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tok->next = next->next;
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free(next->str);
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delete next;
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// InsertTokens - Copy and insert tokens
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//---------------------------------------------------------------------------
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static void InsertTokens(TOKEN *dest, TOKEN *src, unsigned int n)
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{
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while (n > 0)
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{
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TOKEN *NewToken = new TOKEN;
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NewToken->FileIndex = src->FileIndex;
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NewToken->linenr = src->linenr;
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NewToken->str = strdup(src->str);
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NewToken->next = dest->next;
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dest->next = NewToken;
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dest = dest->next;
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src = src->next;
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n--;
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}
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Tokenize - tokenizes a given file.
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//---------------------------------------------------------------------------
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void Tokenize(const char FileName[])
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{
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// Has this file been tokenized already?
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for (unsigned int i = 0; i < Files.size(); i++)
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{
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if ( SameFileName( Files[i].c_str(), FileName ) )
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return;
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}
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// Open file..
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std::ifstream fin(FileName);
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if (!fin.is_open())
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return;
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// The "Files" vector remembers what files have been tokenized..
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Files.push_back(FileName);
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// Tokenize the file..
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TokenizeCode( fin, Files.size() - 1 );
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Tokenize - tokenizes input stream
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//---------------------------------------------------------------------------
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void TokenizeCode(std::istream &code, const unsigned int FileIndex)
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{
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// Tokenize the file.
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unsigned int lineno = 1;
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char CurrentToken[1000] = {0};
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char *pToken = CurrentToken;
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for (char ch = (char)code.get(); !code.eof(); ch = (char)code.get())
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{
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// Preprocessor stuff?
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if (ch == '#' && !CurrentToken[0])
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{
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std::string line;
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getline(code,line);
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line = "#" + line;
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if (strncmp(line.c_str(),"#include",8)==0 &&
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line.find("\"") != std::string::npos)
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{
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// Extract the filename
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line.erase(0, line.find("\"")+1);
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line.erase(line.find("\""));
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// Relative path..
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if (Files.back().find_first_of("\\/") != std::string::npos)
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{
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std::string path = Files.back();
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path.erase( 1 + path.find_last_of("\\/") );
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line = path + line;
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}
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addtoken("#include", lineno, FileIndex);
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addtoken(line.c_str(), lineno, FileIndex);
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Tokenize(line.c_str());
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}
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else if (strncmp(line.c_str(), "#define", 7) == 0)
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{
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char *strId = NULL;
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enum {Space1, Id, Space2, Value} State;
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State = Space1;
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for (unsigned int i = 8; i < line.length(); i++)
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{
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if (State==Space1 || State==Space2)
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{
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if (std::isspace(line[i]))
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continue;
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State = (State==Space1) ? Id : Value;
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}
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else if (State==Id)
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{
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if ( std::isspace( line[i] ) )
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{
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strId = strdup(CurrentToken);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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State = Space2;
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continue;
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}
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else if ( ! std::isalnum(line[i]) )
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{
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break;
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}
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}
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*pToken = line[i];
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pToken++;
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}
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if (State==Value)
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{
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addtoken("def", lineno, FileIndex);
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addtoken(strId, lineno, FileIndex);
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addtoken(";", lineno, FileIndex);
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Define(strId, CurrentToken);
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}
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pToken = CurrentToken;
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memset(CurrentToken, 0, sizeof(CurrentToken));
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free(strId);
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}
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else
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{
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addtoken("#", lineno, FileIndex);
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addtoken(";", lineno, FileIndex);
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}
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lineno++;
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continue;
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}
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if (ch == '\n')
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{
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// Add current token..
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addtoken(CurrentToken, lineno++, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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continue;
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}
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// Comments..
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if (ch == '/' && !code.eof())
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{
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bool newstatement = bool( strchr(";{}", CurrentToken[0]) != NULL );
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// Add current token..
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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// Read next character..
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ch = (char)code.get();
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// If '//'..
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if (ch == '/')
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{
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std::string comment;
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getline( code, comment ); // Parse in the whole comment
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// If the comment says something like "fred is deleted" then generate appropriate tokens for that
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comment = comment + " ";
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if ( newstatement && comment.find(" deleted ")!=std::string::npos )
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{
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// delete
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addtoken( "delete", lineno, FileIndex );
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// fred
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std::string::size_type pos1 = comment.find_first_not_of(" \t");
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std::string::size_type pos2 = comment.find(" ", pos1);
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std::string firstWord = comment.substr( pos1, pos2-pos1 );
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addtoken( firstWord.c_str(), lineno, FileIndex );
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// ;
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addtoken( ";", lineno, FileIndex );
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}
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lineno++;
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continue;
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}
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// If '/*'..
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if (ch == '*')
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{
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char chPrev;
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ch = chPrev = 'A';
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while (!code.eof() && (chPrev!='*' || ch!='/'))
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{
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chPrev = ch;
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ch = (char)code.get();
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if (ch == '\n')
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lineno++;
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}
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continue;
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}
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// Not a comment.. add token..
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addtoken("/", lineno, FileIndex);
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}
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// char..
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if (ch == '\'')
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{
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// Add previous token
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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// Read this ..
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CurrentToken[0] = ch;
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CurrentToken[1] = (char)code.get();
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CurrentToken[2] = (char)code.get();
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if (CurrentToken[1] == '\\')
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CurrentToken[3] = (char)code.get();
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// Add token and start on next..
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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continue;
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}
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// String..
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if (ch == '\"')
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{
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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bool special = false;
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char c = ch;
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do
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{
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// Append token..
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if ( pToken < &CurrentToken[sizeof(CurrentToken)-10] )
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{
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*pToken = c;
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pToken++;
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}
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// Special sequence '\.'
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if (special)
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special = false;
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else
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special = (c == '\\');
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// Get next character
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c = (char)code.get();
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}
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while (!code.eof() && (special || c != '\"'));
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*pToken = '\"';
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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continue;
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}
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if (strchr("+-*/%&|^?!=<>[](){};:,.",ch))
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{
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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CurrentToken[0] = ch;
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addtoken(CurrentToken, lineno, FileIndex);
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memset(CurrentToken, 0, sizeof(CurrentToken));
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pToken = CurrentToken;
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continue;
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}
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if (std::isspace(ch) || std::iscntrl(ch))
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{
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addtoken(CurrentToken, lineno, FileIndex);
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pToken = CurrentToken;
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memset(CurrentToken, 0, sizeof(CurrentToken));
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continue;
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}
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*pToken = ch;
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pToken++;
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}
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// Combine tokens..
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for (TOKEN *tok = tokens; tok && tok->next; tok = tok->next)
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{
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combine_2tokens(tok, "<", "<");
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combine_2tokens(tok, ">", ">");
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combine_2tokens(tok, "&", "&");
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combine_2tokens(tok, "|", "|");
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combine_2tokens(tok, "+", "=");
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combine_2tokens(tok, "-", "=");
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combine_2tokens(tok, "*", "=");
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combine_2tokens(tok, "/", "=");
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combine_2tokens(tok, "&", "=");
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combine_2tokens(tok, "|", "=");
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combine_2tokens(tok, "=", "=");
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combine_2tokens(tok, "!", "=");
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combine_2tokens(tok, "<", "=");
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combine_2tokens(tok, ">", "=");
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combine_2tokens(tok, ":", ":");
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combine_2tokens(tok, "-", ">");
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combine_2tokens(tok, "private", ":");
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combine_2tokens(tok, "protected", ":");
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combine_2tokens(tok, "public", ":");
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}
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// Replace "->" with "."
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for ( TOKEN *tok = tokens; tok; tok = tok->next )
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{
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if ( strcmp(tok->str, "->") == 0 )
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{
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strcpy( tok->str, "." );
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}
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}
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// typedef..
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for ( TOKEN *tok = tokens; tok; tok = tok->next )
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{
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if (Match(tok, "typedef %type% %type% ;"))
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{
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const char *type1 = getstr(tok, 1);
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const char *type2 = getstr(tok, 2);
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for ( TOKEN *tok2 = tok; tok2; tok2 = tok2->next )
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{
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if (tok2->str!=type2 && strcmp(tok2->str,type2)==0)
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{
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free(tok2->str);
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tok2->str = strdup(type1);
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}
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}
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}
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else if (Match(tok, "typedef %type% %type% %type% ;"))
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{
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const char *type1 = getstr(tok, 1);
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const char *type2 = getstr(tok, 2);
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const char *type3 = getstr(tok, 3);
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for ( TOKEN *tok2 = tok; tok2; tok2 = tok2->next )
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{
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if (tok2->str!=type3 && strcmp(tok2->str,type3)==0)
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{
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free(tok2->str);
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tok2->str = strdup(type1);
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TOKEN *newtok = new TOKEN;
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newtok->str = strdup(type2);
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newtok->FileIndex = tok2->FileIndex;
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newtok->linenr = tok2->linenr;
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newtok->next = tok2->next;
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tok2->next = newtok;
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}
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}
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}
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}
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Simplify token list
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//---------------------------------------------------------------------------
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void SimplifyTokenList()
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{
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// Remove the keyword 'unsigned'
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for ( TOKEN *tok = tokens; tok; tok = tok->next )
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{
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if (tok->next && strcmp(tok->next->str,"unsigned")==0)
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{
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DeleteNextToken( tok );
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}
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}
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// Replace constants..
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if (Match(tok,"const %type% %var% = %num% ;"))
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{
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const char *sym = getstr(tok,2);
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const char *num = getstr(tok,4);
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for (TOKEN *tok2 = _gettok(tok,6); tok2; tok2 = tok2->next)
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{
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if (strcmp(tok2->str,sym) == 0)
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{
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free(tok2->str);
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tok2->str = strdup(num);
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}
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}
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}
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}
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// Fill the map TypeSize..
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TypeSize.clear();
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TypeSize["char"] = sizeof(char);
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TypeSize["short"] = sizeof(short);
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TypeSize["int"] = sizeof(int);
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TypeSize["long"] = sizeof(long);
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TypeSize["float"] = sizeof(float);
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TypeSize["double"] = sizeof(double);
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if (Match(tok,"class %var%"))
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{
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TypeSize[getstr(tok,1)] = 11;
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}
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else if (Match(tok, "struct %var%"))
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{
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TypeSize[getstr(tok,1)] = 13;
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}
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}
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// Replace 'sizeof(type)'..
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if (strcmp(tok->str,"sizeof") != 0)
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continue;
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if (Match(tok, "sizeof ( %type% * )"))
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{
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free(tok->str);
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char str[10];
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// 'sizeof(type *)' has the same size as 'sizeof(char *)'
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sprintf( str, "%u", (unsigned int)sizeof(char *));
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tok->str = strdup( str );
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for (int i = 0; i < 4; i++)
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{
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DeleteNextToken(tok);
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}
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}
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else if (Match(tok, "sizeof ( %type% )"))
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{
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const char *type = getstr(tok, 2);
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int size = SizeOfType(type);
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if (size > 0)
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{
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free(tok->str);
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char str[10];
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sprintf( str, "%d", size );
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tok->str = strdup( str );
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for (int i = 0; i < 3; i++)
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{
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DeleteNextToken(tok);
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}
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}
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}
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}
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// Replace 'sizeof(var)'
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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// type array [ num ] ;
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if ( ! Match(tok, "%type% %var% [ %num% ] ;") )
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continue;
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int size = SizeOfType(tok->str);
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if (size <= 0)
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continue;
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const char *varname = getstr(tok, 1);
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int total_size = size * atoi( getstr(tok, 3) );
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// Replace 'sizeof(var)' with number
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int indentlevel = 0;
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for ( TOKEN *tok2 = _gettok(tok,5); tok2; tok2 = tok2->next )
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{
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if (tok2->str[0] == '{')
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{
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indentlevel++;
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}
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else if (tok2->str[0] == '}')
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{
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indentlevel--;
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if (indentlevel < 0)
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break;
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}
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// Todo: Match varname directly
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else if (Match(tok2, "sizeof ( %var% )"))
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{
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if (strcmp(getstr(tok2,2), varname) == 0)
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{
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free(tok2->str);
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char str[20];
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sprintf( str, "%d", total_size);
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tok2->str = strdup(str );
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// Delete the other tokens..
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for (int i = 0; i < 3; i++)
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{
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DeleteNextToken(tok2);
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}
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}
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}
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}
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}
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// Simple calculations..
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bool done = false;
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while (!done)
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{
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done = true;
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if (Match(tok->next, "* 1") || Match(tok->next, "1 *"))
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{
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for (int i = 0; i < 2; i++)
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DeleteNextToken(tok);
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done = false;
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}
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// (1-2)
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if (strchr("[,(=<>",tok->str[0]) &&
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IsNumber(getstr(tok,1)) &&
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strchr("+-*/",*(getstr(tok,2))) &&
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IsNumber(getstr(tok,3)) &&
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strchr("],);=<>",*(getstr(tok,4))) )
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{
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int i1 = atoi(getstr(tok,1));
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int i2 = atoi(getstr(tok,3));
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if ( i2 == 0 && *(getstr(tok,2)) == '/' )
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{
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continue;
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}
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switch (*(getstr(tok,2)))
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{
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case '+': i1 += i2; break;
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case '-': i1 -= i2; break;
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case '*': i1 *= i2; break;
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case '/': i1 /= i2; break;
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}
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tok = tok->next;
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free(tok->str);
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char str[10];
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sprintf(str,"%d", i1);
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tok->str = strdup(str);
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for (int i = 0; i < 2; i++)
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{
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DeleteNextToken(tok);
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}
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done = false;
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}
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}
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}
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// Replace "*(str + num)" => "str[num]"
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if ( ! strchr(";{}(=<>", tok->str[0]) )
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continue;
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TOKEN *next = tok->next;
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if ( ! next )
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break;
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if (Match(next, "* ( %var% + %num% )"))
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{
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const char *str[4] = {"var","[","num","]"};
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str[0] = getstr(tok,3);
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str[2] = getstr(tok,5);
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for (int i = 0; i < 4; i++)
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{
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tok = tok->next;
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free(tok->str);
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tok->str = strdup(str[i]);
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}
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DeleteNextToken(tok);
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DeleteNextToken(tok);
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}
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}
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// Split up variable declarations if possible..
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for (TOKEN *tok = tokens; tok; tok = tok->next)
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{
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if ( ! strchr("{};", tok->str[0]) )
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continue;
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TOKEN *type0 = tok->next;
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if (!type0)
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break;
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if (strcmp(type0->str, "else") == 0)
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continue;
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TOKEN *tok2 = NULL;
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unsigned int typelen = 0;
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if ( Match(type0, "%type% %var% ,") )
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{
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tok2 = _gettok(type0, 2); // The ',' token
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typelen = 1;
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}
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else if ( Match(type0, "%type% * %var% ,") )
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{
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tok2 = _gettok(type0, 3); // The ',' token
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typelen = 1;
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}
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else if ( Match(type0, "%type% %var% [ %num% ] ,") )
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{
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tok2 = _gettok(type0, 5); // The ',' token
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typelen = 1;
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}
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else if ( Match(type0, "%type% * %var% [ %num% ] ,") )
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{
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tok2 = _gettok(type0, 6); // The ',' token
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typelen = 1;
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}
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else if ( Match(type0, "struct %type% %var% ,") )
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{
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tok2 = _gettok(type0, 3);
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typelen = 2;
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}
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else if ( Match(type0, "struct %type% * %var% ,") )
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{
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tok2 = _gettok(type0, 4);
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typelen = 2;
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}
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else if ( Match(type0, "%type% %var% =") )
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{
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tok2 = _gettok(type0, 2);
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typelen = 1;
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}
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else if ( Match(type0, "%type% * %var% =") )
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{
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tok2 = _gettok(type0, 3);
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typelen = 1;
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}
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else if ( Match(type0, "struct %type% * %var% =") )
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{
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tok2 = _gettok(type0, 4);
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typelen = 2;
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}
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if (tok2)
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{
|
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if (tok2->str[0] == ',')
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{
|
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free(tok2->str);
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tok2->str = strdup(";");
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InsertTokens(tok2, type0, typelen);
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}
|
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else
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{
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TOKEN *eq = tok2;
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int parlevel = 0;
|
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while (tok2)
|
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{
|
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if ( strchr("{(", tok2->str[0]) )
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{
|
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parlevel++;
|
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}
|
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|
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else if ( strchr("})", tok2->str[0]) )
|
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{
|
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if (parlevel<0)
|
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break;
|
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parlevel--;
|
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}
|
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|
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else if ( parlevel==0 && strchr(";,",tok2->str[0]) )
|
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{
|
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// "type var =" => "type var; var ="
|
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TOKEN *VarTok = _gettok(type0,typelen);
|
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if (VarTok->str[0]=='*')
|
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VarTok = VarTok->next;
|
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InsertTokens(eq, VarTok, 2);
|
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free(eq->str);
|
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eq->str = strdup(";");
|
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|
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// "= x, " => "= x; type "
|
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if (tok2->str[0] == ',')
|
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{
|
|
free(tok2->str);
|
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tok2->str = strdup(";");
|
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InsertTokens( tok2, type0, typelen );
|
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}
|
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break;
|
|
}
|
|
|
|
tok2 = tok2->next;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
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//---------------------------------------------------------------------------
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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//---------------------------------------------------------------------------
|
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// Helper functions for handling the tokens list
|
|
//---------------------------------------------------------------------------
|
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|
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const TOKEN *findtoken(const TOKEN *tok1, const char *tokenstr[])
|
|
{
|
|
for (const TOKEN *ret = tok1; ret; ret = ret->next)
|
|
{
|
|
unsigned int i = 0;
|
|
const TOKEN *tok = ret;
|
|
while (tokenstr[i])
|
|
{
|
|
if (!tok)
|
|
return NULL;
|
|
if (*(tokenstr[i]) && strcmp(tokenstr[i],tok->str))
|
|
break;
|
|
tok = tok->next;
|
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i++;
|
|
}
|
|
if (!tokenstr[i])
|
|
return ret;
|
|
}
|
|
return NULL;
|
|
}
|
|
//---------------------------------------------------------------------------
|
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|
|
const TOKEN *gettok(const TOKEN *tok, int index)
|
|
{
|
|
while (tok && index>0)
|
|
{
|
|
tok = tok->next;
|
|
index--;
|
|
}
|
|
return tok;
|
|
}
|
|
//---------------------------------------------------------------------------
|
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|
|
const char *getstr(const TOKEN *tok, int index)
|
|
{
|
|
tok = gettok(tok, index);
|
|
return tok ? tok->str : "";
|
|
}
|
|
//---------------------------------------------------------------------------
|
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|
|
|
|
|
|
// Deallocate lists..
|
|
void DeallocateTokens()
|
|
{
|
|
while (tokens)
|
|
{
|
|
TOKEN *next = tokens->next;
|
|
free(tokens->str);
|
|
delete tokens;
|
|
tokens = next;
|
|
}
|
|
tokens_back = tokens;
|
|
|
|
while (dsymlist)
|
|
{
|
|
struct DefineSymbol *next = dsymlist->next;
|
|
free(dsymlist->name);
|
|
free(dsymlist->value);
|
|
delete dsymlist;
|
|
dsymlist = next;
|
|
}
|
|
}
|
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|
|
|
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|
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|