Convert output from MD5 to printable ascii

[santosh]

Re: OT - Re: Convert output from MD5 to printable ascii


Ben Pfaff wrote:

"santosh" <santosh.k83@gm ail.comwrites:
>

Interestingly, over here, (gcc 4.0.3 on an i686 Linux), gcc will emit
a call to puts for the corresponding printf invocation when the first
argument contains no format specifiers. This is done even when
optimisations are disabled.

>
I hope it does that only when the format string ends in a
new-line character.

It seems to do as you say. Why that requirement?

[Joachim Schmitz]

Re: OT - Re: Convert output from MD5 to printable ascii

"santosh" <santosh.k83@gm ail.comschrieb im Newsbeitrag
news:1172393796 .270714.251430@ m58g2000cwm.goo glegroups.com.. .

>
Ben Pfaff wrote:

>"santosh" <santosh.k83@gm ail.comwrites:
>>

Interestingly, over here, (gcc 4.0.3 on an i686 Linux), gcc will emit
a call to puts for the corresponding printf invocation when the first
argument contains no format specifiers. This is done even when
optimisations are disabled.

>>
>I hope it does that only when the format string ends in a
>new-line character.

>
It seems to do as you say. Why that requirement?

Because puts() appends a newline to the string it prints. It printf() hadn't
been told to add a newline, and would use puts() to do the printing, that
would add a newline, rendering the printf() behavoir non-conforming.

Bye, Jojo

[Flash Gordon]

Re: OT - Re: Convert output from MD5 to printable ascii

santosh wrote, On 25/02/07 08:56:

Ben Pfaff wrote:

>"santosh" <santosh.k83@gm ail.comwrites:
>>

>>Interestingly , over here, (gcc 4.0.3 on an i686 Linux), gcc will emit
>>a call to puts for the corresponding printf invocation when the first
>>argument contains no format specifiers. This is done even when
>>optimisatio ns are disabled.

>I hope it does that only when the format string ends in a
>new-line character.

>
It seems to do as you say. Why that requirement?

Because puts appends a newline character, so it can't be used when you
want to print a partial line not ending in a newline (possibly because
some other part of the program will print the rest of the line).
--
Flash Gordon

[santosh]

Re: OT - Re: Convert output from MD5 to printable ascii

Flash Gordon wrote:

santosh wrote, On 25/02/07 08:56:

Ben Pfaff wrote:

"santosh" <santosh.k83@gm ail.comwrites:
>
>Interestingl y, over here, (gcc 4.0.3 on an i686 Linux), gcc will emit
>a call to puts for the corresponding printf invocation when the first
>argument contains no format specifiers. This is done even when
>optimisation s are disabled.
>
I hope it does that only when the format string ends in a
new-line character.

It seems to do as you say. Why that requirement?

>
Because puts appends a newline character, so it can't be used when you
want to print a partial line not ending in a newline (possibly because
some other part of the program will print the rest of the line).

Thanks. I see it now.

[Randy Howard]

Re: Convert output from MD5 to printable ascii

On Sat, 24 Feb 2007 22:13:21 -0600, websnarf@gmail. com wrote
(in article <1172376801.654 074.324240@j27g 2000cwj.googleg roups.com>):

On Feb 24, 1:42 pm, Keith Thompson <k...@mib.orgwr ote:

>websn...@gmail .com writes:

>>However, I would, of course, just do this:
>>char out[33], *p;
>>for (p=out,i=0; i < 16; i++) {
>>*p++ = "0123456789ABCD EF"[(pout[i] >4) & 0xf];
>>*p++ = "0123456789ABCD EF"[pout[i] & 0xf];
>>}
>>*p = '\0';
>>puts (out);

>>

>>to avoid linking in all of printf() unnecessarily.

>>
>I presume you would first confirm that (a) the use of puts() doesn't
>cause printf() to be linked in anyway on target implementations of
>interest,

>
Well, I don't know what quality of implementations you are used to.
All the compilers I use basically do link these seperately. The
reason is that printf is a gargantuan link-in in comparison to puts.

I just tried this with gcc 4.0.1 using gcc on a Hello, World program
with printf and puts on OS X. The output size is exactly the same.
So, I used a slightly trickier printf() call that shouldn't be switched
out to a straight puts(), and that output file went up by 4284 bytes.

Outside of embedded land, that is completely meaningless.

--
Randy Howard (2reply remove FOOBAR)
"The power of accurate observation is called cynicism by those
who have not got it." - George Bernard Shaw