Re: sscanf: parsing a file - C / C++ / MFC Discussion Boards

Thank you.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

I think you guys are all slaves of that palini the ASHO.
I can see the forum for his developement skills. Looks like he is a frsutrated devloper in and needs some moksha. Let me know if you need that Smile | :)

Ganje (Read bald in your mother tongue Smile | :)

) aadmi ka aise hee haal hota hein

tom groezer wrote:
Ganje (Read bald in your mother tongue Smile ) aadmi ka aise hee haal hota hein

Of course you missed my mother tongue. I see you have a brilliant brain. Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

CPallini wrote:
Of course you missed my mother tongue.

Take it as a compliment. Hell, your English is probably better than mine.

Laugh | :laugh:

L u n a t i c F r i n g e

LunaticFringe wrote:
Take it as a compliment.

Good point.

LunaticFringe wrote:
Hell, your English is probably better than mine.

Nah, my English is actually bad.
Anyway now it is a bit better, thanks to all the people mocking me when I started to post in the Lounge, few years ago.
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

I need to to talk to all slaves of that lang Smile | :)

)

Yeah, I suppose it is a part of the troll's baggage.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

If it wasn't for English, you Indians mostly couldn't talk to each other. D'Oh! | :doh:

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

CPallini wrote:
Anyway now it is a bit better, thanks to all the people mocking me when I started to post in the Lounge, few years ago.

Well, hey, I'll have to make sure and tease you if I see anything amiss. Wouldn't want you thinking I wasn't doing my part, ya know.

Laugh | :laugh:

L u n a t i c F r i n g e

LunaticFringe wrote:
Take it as a compliment.

Good point.
--->which one. you being a ganja

LunaticFringe wrote:
Hell, your English is probably better than mine.

pallini
Nah, my English is actually bad.
Anyway now it is a bit better, thanks to all the people mocking me when I started to post in the Lounge, few years ago.

Hope your attitute also shines like you head when people mock you in days to come Smile | :)

Big Grin

I hope your brilliant brain will eventually overcome the 'skip blanks and tabs' daunting trouble. Laugh | :laugh:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Thanks (oh my master Poke tongue | ;-P

) this saved my day! Laugh | :laugh:

Greetings
Covean

thanks my optimistic philospher.
you work full time on this board and are getting paid for the sh*t u speak.

If you spent half the time working on your problem than you do hurling insults, you probably would answered your own question hours ago.

5!

tom groezer wrote:
I need a urgent fix and dont want to travel googling.

It doesn't get much faster than Googling so get used to it. If you had a clue, you'd have had your answer before you could post here.

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

I'm not quite sure what you've done to annoy CPallini... but he has my trust, so I assume you deserve the long flamewar above this post.

But *I'm* in a good mood...

I would not use the sscanf function at all for this.

One, the tabs / spaces are delimiters. In which case, read a line of text in, then use your favourite string classes Find function to get the next whitespace. Then parse the next up to that point. Delete the text you've parsed, and repeat.

OK, once you've broken the long line into stringlets, then you can use sscanf if you like!

Good luck,

Iain.

I have now moved to Sweden for love (awwww).

I love you, man (expecially with the warrior outfit). Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

CPallini wrote:
expecially with the warrior outfit

Since he moved to Sweden, does that involve a big helmet with horns? Laugh | :laugh:

And yes, I know the Vikings didn't actually wear those but they're cool anyhow. Cool | :cool:

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

I think you missed something [^]...
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Guess so!

I don't usually check the profiles of people I'm familiar with. Guess we'd better send the word out that a raiding party is on the way. Laugh | :laugh:

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

After your tirade to other professionals here, you surely do not deserve any help.

tom groezer wrote:
I need to parse a file...
I'm using sscanf function.

Which means you are using the wrong tool for the job. fscanf() would be used to parse the file, while sscanf() would be used to parse a string read from the file. There is a subtle but big difference. Learn that difference and you'll save yourself many bouts with foot-in-mouth disease.

tom groezer wrote:
How do I ensure that I skip the spaces and tabs which could be in randon number.

Is it really that hard to find something like:

char *str = "I  really\tdo \t not  deserve    any\t  help";
char s1[8], s2[8], s3[8], s4[8], s5[8], s6[8], s7[8];
sscanf(str, "%s %s %s %s %s %s %s", s1, s2, s3, s4, s5, s6, s7);

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

I am writing a adler32 code to compute the adler32 checksum of a string.
On the net I came across various sample codes:
I did not understand some code entirely as <b>it has additional code</b> marked in bold below apart from the basic implementation of the adler32 logic.
I did not understand the addional part as to what is is doing.
Can anybody experienced with adler32 give some hint on it?

The various sample codes are:

//---------------------------------------------------------------------
// WIKI
I understood this code as its the basic implementation of the adler32 logic.
So no doubts in this.

/* Loop over each byte of data, in order */
for (size_t index = 0; index < blen; ++index)
{
a = (a + buff[index]) % BASE;
b = (b + a) % BASE;
}

wweak_cs = (b << 16) | a;
//---------------------------------------------------------------------
// RSYNC
I did not understand some code marked in bold below.
{
#define CHAR_OFFSET 0
char *buf = buff;
int len = blen;
int index = 0;
UINT32 s1, s2;

s1 = s2 = 0;
for (index = 0; index < (len-4); index+=4)
{
s2 += 4*(s1 + buf[index]) + 3*buf[index+1] + 2*buf[index+2] + buf[index+3] + 10*CHAR_OFFSET;
s1 += (buf[index+0] + buf[index+1] + buf[index+2] + buf[index+3] + 4*CHAR_OFFSET);
}
for (; index < len; index++)
{
s1 += (buf[index]+CHAR_OFFSET); s2 += s1;
}
rweak_cs = (s1 & 0xffff) + (s2 << 16);
weak_cs = rweak_cs;
}
//---------------------------------------------------------------------
// sharpdevelop
I did not understand some code marked in bold below.

{
char *buf = buff;
int len = blen;
sweak_cs = 1;
int s1 = sweak_cs & 0xFFFF;
int s2 = sweak_cs >> 16 & 0xFFFF;
int index =0;

while (len > 0)
{
int n = 3800;
if (n > len)
{
n = len;
}
len -= n;
while (--n >= 0)
{
s1 = s1 + (int)(buf[index++] & 0xFF);
s2 = s2 + s1;
}
s1 %= BASE;
s2 %= BASE;
}

sweak_cs = (s2 << 16) | s1;
weak_cs = sweak_cs;
}
//---------------------------------------------------------------------
//altivec
I did not understand some code marked in bold below.

{
#define NMAX 5552 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8);
# define MOD(a) a %= BASE

char *buf = buff;
int len = blen;
aweak_cs = 1;
unsigned long s1 = aweak_cs & 0xffff;
unsigned long s2 = (aweak_cs >> 16) & 0xffff;
int k;
while (len > 0)
{
k = len < NMAX ? (int)len : NMAX;
len -= k;
while (k >= 16)
{
DO16(buf);
buf += 16;
k -= 16;
}
if (k != 0)
{
do
{
s1 += *buf++;
s2 += s1;
} while (--k);
}
MOD(s1);
MOD(s2);
}

aweak_cs = (s2 << 16) | s1;
weak_cs = aweak_cs;
}

Can anybody clear the doubts?

Why do you need the 'additional code' can you just use the basic algorithm?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]