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zackriggle

Pointer Error

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Alright, this is REALLY pissing me off... Please tell me why this creates errors:
  
//

// int2hex takes a LONG and converts it to hex in ASCII

//

// mqarc - an archive

// mqarc.files - a vector with the members:

//  start, end, name

//

//

	char* buf;
	buf = new char [6];
	for(i = 0; i != mqarc.files.size(); i++)
	{
		// Get file size

		fbuf.open(mqarc.files[i].name);
		fbuf.seekg(0,ios::end); // Get position of last char (total length)


		// Enter vars....

		mqarc.files[i].start = last + 1;
		mqarc.files[i].end = mqarc.files[i].start + fbuf.tellg();
		last = mqarc.files[i].end;

		fbuf.close();

		// Write vars....

		fout << mqarc.files[i].name << endl;
			// Convert the decimal-length to a hex-length in ASCII and write

			strcpy(buf,int2hex(mqarc.files[i].start));
			fout << buf << endl;
			strcpy(buf,int2hex(mqarc.files[i].end));
			fout << buf << endl;
	};
	delete[] buf;
  
================== My (soon-to-be) Cherished Cookie of Appreciation: -- MattB - for WinSock advice --

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Guest Anonymous Poster
Hi ..

yes, what errors anyway

this is the internal x to ascii helper function from the ms-crt
if you have msvc++ installed look at VC98\CRT\SRC\XTOA.C

setting radix to 16 puts out HEX ..


   
void xtoa (unsigned long val, // value

char *buf, // outputbuffer

unsigned radix, // 10 decimal,2 binary, a.s.o

int is_neg) // != 0 when negative value

{
char *p; /* pointer to traverse string */
char *firstdig; /* pointer to first digit */
char temp; /* temp char */
unsigned digval; /* value of digit */

p = buf;

if (is_neg) {
/* negative, so output ''-'' and negate */
*p++ = ''-'';
val = (unsigned long)(-(long)val);
}

firstdig = p; /* save pointer to first digit */

do {
digval = (unsigned) (val % radix);
val /= radix; /* get next digit */

/* convert to ascii and store */
if (digval > 9)
*p++ = (char) (digval - 10 + ''a'');/* a letter */
else
*p++ = (char) (digval + ''0''); /* a digit */
} while (val > 0);

/* We now have the digit of the number in the buffer, but in reverse
order. Thus we reverse them now. */

*p-- = ''\0''; /* terminate string; p points to last digit */

do {
temp = *p;
*p = *firstdig;
*firstdig = temp; /* swap *p and *firstdig */
--p;
++firstdig; /* advance to next two digits */
} while (firstdig < p); /* repeat until halfway */

}


if you only want to convert long then just modify it a little bit to remove the unnecessary parts ..

or use _itoa()(ms) itoa() (non-ms)
take a look at your crt-docs

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