// Regression test for STL seekg

#include <cstdio> // I really like formatted output.

#include <cstdarg>

#include <fstream>

#include <vector>

#include <iostream>

//#include <stdio.h>

#ifndef cstd

#ifdef _MSC_VER

#define cstd

#else

//#define cstd std

#define cstd

using namespace std;

#endif

#endif

class Error : public std::exception

{

public:

Error(const char *pszfmt, ...);

const char *what() const;

private:

char mMessage[256];

};

#define countof(x) (sizeof(x)/sizeof((x)[0]))

Error::Error(const char *pszfmt, ...)

{

  using cstd::va_list;

  cstd::va_list ap;

va_start(ap, pszfmt);

cstd::vsnprintf(mMessage, countof(mMessage), pszfmt, ap);

va_end(ap);

}

const char *Error::what() const

{

return mMessage;

}

// usage: testseek filename

#ifdef __SYMBIAN32__

int fstream_test(int, char**)

#else

int main(int argc, char **argv)

#endif

{

try

{

#ifndef __SYMBIAN32__

if (argc != 2) {

throw Error ("Wrong number of arguments (Usage: testseek filename)");

}

#endif

std::ifstream ifs;

ifs.exceptions(std::ios::badbit);

#ifndef __SYMBIAN32__

ifs.open(argv[1]);

#else

ifs.open("c:\\testframework\\tstdcpp\\fstream1.input");

#endif

// First pass: read contents of file into character vector

std::vector<char> charvec;

cstd::printf("First pass:\n");

for(;;)

{

char ch;

if (!ifs.get(ch)) {

break;

}

cstd::printf("%c", ch);

charvec.push_back(ch);

}

cstd::printf("First pass done\n");

// Second pass: get positions into pos vector, checking chars

std::vector<std::ios::pos_type> posvec;

ifs.clear(); // necessary?

ifs.seekg(0);

std::vector<char>::const_iterator char_it;

cstd::printf("Second pass:\n");

for(char_it = charvec.begin(); char_it != charvec.end(); ++char_it)

{

std::ios::pos_type pos = ifs.tellg();

posvec.push_back(pos);

char ch;

if (!ifs.get(ch)) {

break;

}

cstd::printf("%c", ch);

if (ch != *char_it) {

#ifdef __SYMBIAN32__

Error e1("Character mismatch: got '%c', expected '%c'",ch, *char_it);

throw e1;

#else 

throw Error("Character mismatch: got '%c', expected '%c'",ch, *char_it);

#endif

}

}

if (char_it != charvec.end()) {

#ifdef __SYMBIAN32__

Error e2("Unexpected end of file");

throw e2;

#else

throw Error("Unexpected end of file");

#endif

}

cstd::printf("Second pass done\n");

// Third pass: seek to each saved position and read next char

ifs.clear(); // necessary, but I don't like it

std::vector<std::ios::pos_type>::const_iterator pos_it;

cstd::printf("Third pass:\n");

for(char_it = charvec.begin(), pos_it = posvec.begin();

char_it != charvec.end(); ++char_it, ++pos_it)

{

ifs.seekg(*pos_it);

char ch;

if (!ifs.get(ch)) {

#ifdef __SYMBIAN32__

Error e3("End of file when expecting '%c'", *char_it);

throw e3;

#else

throw Error("End of file when expecting '%c'", *char_it);

#endif

}

cstd::printf("%c", ch);

if (ch != *char_it) {

Error e4("Character mismatch: got '%c', expected '%c'",ch, *char_it);

throw e4;

}

}

cstd::printf("Third pass done\n");

cstd::printf("Test passed\n");

std::cerr<<"Testing cerr...\n";

std::cerr<<"Testing cerr"<<std::endl;

std::cerr<<"Testing cerr with char "<<(char)'5'<<std::endl;

std::cerr<<"Testing cerr with float "<<(float)5.555<<std::endl;

std::cerr<<"Testing cerr with int "<<(int)5<<std::endl;

}

catch (std::exception &e)

{

cstd::printf("\nCaught exception: %s\n", e.what());

cstd::printf("Test failed!\n");

return 1;

}

return 0;

}

// end of program