Lowyat.NET: Latest topics by wednesday

Double (fp) to String

wednesday — Mon, 23 Feb 2009 02:21:59 +0800

Following is a function to convert any given floating-point number to string-form. I am not sure whether this code is 100% bug free as I am still testing for any errors.. Can you all help me to test as well.. Thanks.

CODE

#ifndef _CVTBUFSIZE
#define _CVTBUFSIZE 309 + 40
#endif

char* DoubleToString( double value, int precision )
{
char *str_out = NULL, *head = NULL;
int i_part = 0, index = 0, extract = 0,
limit = 0, offset = 0, bZeroLead = 0;
double f_part = 0.0;

// _CVTBUFSIZE constant is used because I think it is the maximum size
// for all platforms, I believe..
head = str_out = calloc( _CVTBUFSIZE, sizeof(char) );
// Make sure that the precision is within acceptable range..
if ( precision <= 0 || precision > 40 ) precision = 6;
// precision = 3, limit = 4.. 2.333'5' << for rounding purpose..
limit = precision + 1;
// to check whether it's negative..
if ( value < 0 )
{
*str_out = '-';
++str_out;
value *= -1.0;
}
// extract the integer part: 123.456 >> '123'
extract = i_part = (int) value;
// this is to make sure that the output string has a prefix '0' if
// the input value = 0.xxxx
if ( !extract )
{
bZeroLead = 1;
*str_out = '0';
++str_out;
}
// fraction part extraction: 123.456 >> '0.456'
while ( limit ) // limit is always more than prec by 1..
{
f_part = value - (double) i_part;
value = f_part * 10;
i_part = (int) value;
if ( !extract && !i_part )
{
str_out[offset] = '0';
++offset;
}
extract = extract * 10 + i_part; // add the int and frac to be one int. unity!
--limit;
}
// rounding up code, it took me some time to simplify the code to such:
if ( ( extract % 10 ) >= 5 )
extract = ( extract / 10 ) + 1;
else
extract /= 10; // this is necessary because limit = precision + 1;

// convert the united numbers to string
_itoa( extract, &str_out[offset], 10 );
// if the fractional part is 0.999999 and precision is 5,
// rounding up will yield 1.000000, so with this,
// the result is verified to avoid 0.10000 which ought to be: 1.00000
if ( bZeroLead )
{
if ( (int) strlen( str_out ) > precision )
{
*str_out = '0';
*( str_out - 1 ) = '1';
*( str_out + strlen( str_out ) - 1 ) = 0;
}
}
// compute the starting index of the fractional part..
index += strlen( str_out ) - precision;
// move the fractional part backwards by 1.. memmove is used instead
// of a loop, better and easier..hehe..
memmove( &str_out[index + 1], &str_out[index],
strlen( &str_out[index] ) * sizeof(char) ); // sizeof is used for safety purpose..
// finally insert the '.' a.k.a decimal point..
str_out[index] = '.';

return head;
}

Kissing scenes in dramas/movies

wednesday — Sun, 15 Feb 2009 21:07:53 +0800

Heh.. Just really curious, are the kissing scenes in most of the dramas/movies real? To me, if it is camera trick, it really doesn't look like camera trick.. It seems very real...

International Link down ?

wednesday — Wed, 08 Nov 2006 14:06:46 +0800

Is the international link down again ? I can't surf any other sites than the local ones.

Streaming Download

wednesday — Sat, 23 Sep 2006 00:35:56 +0800

Hey any software to rip streams ? Like when I watch live service from Cityharvest.tv, due to the slow international link, it's really a pain in ass so I decided to download the whole service to watch but then I can't download because the video is hosted of a streaming server. So how do I rip the video from the site?

p/s: Mod delete this thread if I'm asking the wrong thing. Thanks.

Exporting my posts.

wednesday — Wed, 16 Aug 2006 22:18:47 +0800

Hey se7en, is it possible for me to export all my posts ? I found my own host so I decided to host the blog myself so I have more control over it. Thanks.

Can I hide my blog

wednesday — Wed, 26 Jul 2006 16:47:54 +0800

Hey admins, can I hide my blog ? It is shown at public blog listing there, it's my private blog, contains alot of private stuff, so if possible can I hide my blog ?

lmao SHUFFLE

wednesday — Tue, 27 Jun 2006 14:39:26 +0800

http://www.youtube.com/watch?v=ss9-S0DANnk

lmao. how lame.

Capture screenshot for movie

wednesday — Thu, 04 May 2006 11:53:14 +0800

Hey, any program to capture movie screeenshots ?

Sri KL or Sri Sedaya

wednesday — Thu, 27 Apr 2006 12:36:48 +0800

Hey, just wondering Sri KL or Sri sedaya, do they have form 6 ?

Dampening Material

wednesday — Sun, 09 Apr 2006 00:02:53 +0800

Hi bros, any good dampening material to recommend for my sub ? Currently my sub box doesnt have any dampening.

closed, settled.

wednesday — Sat, 08 Apr 2006 22:16:09 +0800

porblem solved. close time.

HDDLife

wednesday — Fri, 07 Apr 2006 13:09:44 +0800

Lol, kena conned by that stupid program, the program reports that my maxtor's health is 85% but the harddisk itsefl failed to load twice, my computer major lags are caused by this stupid harddisk and the HDDLife can still report my maxtor harddisk is still in good position.

PMPO and RMS

wednesday — Wed, 05 Apr 2006 15:59:24 +0800

Whats PMPO and RMS ? 200W PMPO is how much for RMS ?

College vs Form 6

wednesday — Tue, 04 Apr 2006 21:49:36 +0800

Hey dudes, I need help here, I dont know whether this was posted before or not but anyway, I'm lost, should I go Form 6 or College ? I dont know what to study, I had thought of IT before and Financial also but both also I scare later halfway I lost interest, IT since I std 6 I'm quite good at it, I started VB when I was F1 and F3 I moved on to C then halfway F4 I stopped suddenly, I also dont know why. Any advice ?

Car Amps

wednesday — Fri, 24 Mar 2006 21:30:32 +0800

Hey, can a car amp driive a normal pc speaker, as in 6" and 12" speakers, do I need a seperate preAmp or soemthing ?

LYN Drummers Paradise

wednesday — Tue, 31 May 2005 10:30:41 +0800

All drummers should post at here to notify everyone ur a drummer eventhough im still learning. i know this lame.