Implementation of sizeof, malloc, new

[Anil]

Hi,

Where can I get the source code that has the implementation of the
below
C operators/functions:
malloc
sizeof
new
strcmp
strtok

etc.,

(any website points to the source code)

I am using Linux OS with GCC as my C compiler.

Thanks in advance,
Anil.

[Lawrence Kirby]

On Thu, 20 Jan 2005 04:09:18 -0800, Anil wrote:

Hi,

Where can I get the source code that has the implementation of the
below
C operators/functions:
malloc
sizeof
new
strcmp
strtok
There is no "the source" for these things, every compiler/system library
could have its own version.
etc.,

(any website points to the source code)

I am using Linux OS with GCC as my C compiler.

Since you are talking about open source tools you should be able to find
the source, or a pointer to it, from wherever you got the tools. The
source may even already be on your system.

Lawrence

[dave windsor]

Anil wrote:

Hi,

Where can I get the source code that has the implementation of the
below
C operators/functions:
malloc
sizeof
new
strcmp
strtok

etc.,

(any website points to the source code)

I am using Linux OS with GCC as my C compiler.

Thanks in advance,
Anil.

If you are using a Linux system, as you say you are, the man command is
useful for finding out which files the source of a particular function
is in. In this case, since I know the files off the top of my head,
I'll save you the work:
malloc() - stdlib.h
sizeof() - this is actually an operator
new() [not an ANSI C function] - again, an operator
strcmp() - string.h
strtok() - string.h
These files will be found in your C include directory.

-dave

[Lew Pitcher]

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dave windsor wrote:

Anil wrote:

Hi,

Where can I get the source code that has the implementation of the
below
C operators/functions:
malloc
sizeof
new
strcmp
strtok

etc.,

(any website points to the source code)

I am using Linux OS with GCC as my C compiler.

Thanks in advance,
Anil.

If you are using a Linux system, as you say you are, the man command is
useful for finding out which files the source of a particular function
is in. In this case, since I know the files off the top of my head,
I'll save you the work:
malloc() - stdlib.h

Wrong - stdlib.h contains some definitional values, but not the /source code/
for the malloc function.
sizeof() - this is actually an operator True. To find out how it was implemented, the OP will have to read the source
code of his C compiler.
new() [not an ANSI C function] - again, an operator True. To find out how it was implemented, the OP will have to read the source
code of his C++ compiler.
strcmp() - string.h Wrong - stdlib.h contains some definitional values, but not the /source code/
for the strcmp function.
strtok() - string.h Wrong - stdlib.h contains some definitional values, but not the /source code/
for the strtok function.
These files will be found in your C include directory.

The files you named will be found there. However, the files the OP is looking
for are unlikely to be found in his C include directory.
- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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[Lew Pitcher]

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Lew Pitcher wrote:

dave windsor wrote:

Anil wrote:
Hi,

Where can I get the source code that has the implementation of the
below
C operators/functions:
malloc
sizeof
new
strcmp
strtok

etc.,

(any website points to the source code)

I am using Linux OS with GCC as my C compiler.

Thanks in advance,
Anil.
If you are using a Linux system, as you say you are, the man command is
useful for finding out which files the source of a particular function
is in. In this case, since I know the files off the top of my head,
I'll save you the work:
malloc() - stdlib.h
Wrong - stdlib.h contains some definitional values, but not the /source code/
for the malloc function.

sizeof() - this is actually an operator
True. To find out how it was implemented, the OP will have to read the source
code of his C compiler.

new() [not an ANSI C function] - again, an operator
True. To find out how it was implemented, the OP will have to read the source
code of his C++ compiler.

strcmp() - string.h
Wrong - stdlib.h cut'n'past error: I meant to say "string.h"
contains some definitional values, but not the /source code/
for the strcmp function.

strtok() - string.h
Wrong - stdlib.h cut'n'past error: I meant to say "string.h"
contains some definitional values, but not the /source code/
for the strtok function.

These files will be found in your C include directory.

The files you named will be found there. However, the files the OP is looking
for are unlikely to be found in his C include directory.

- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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[dave windsor]

Lew Pitcher wrote:

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Lew Pitcher wrote:

dave windsor wrote:

Anil wrote:
>Hi,
>
>Where can I get the source code that has the implementation of the>below
>C operators/functions:
>malloc
>sizeof
>new
>strcmp
>strtok
>
>etc.,
>
>(any website points to the source code)
>
>I am using Linux OS with GCC as my C compiler.
>
>Thanks in advance,
>Anil.
If you are using a Linux system, as you say you are, the man command isuseful for finding out which files the source of a particular functionis in. In this case, since I know the files off the top of my head,I'll save you the work:
malloc() - stdlib.h

Wrong - stdlib.h contains some definitional values, but not the /source code/ for the malloc function.

sizeof() - this is actually an operator

True. To find out how it was implemented, the OP will have to read the source code of his C compiler.

new() [not an ANSI C function] - again, an operator

True. To find out how it was implemented, the OP will have to read the source code of his C++ compiler.

strcmp() - string.h

Wrong - stdlib.h

cut'n'past error: I meant to say "string.h"

contains some definitional values, but not the /source code/
for the strcmp function.

strtok() - string.h

Wrong - stdlib.h

cut'n'past error: I meant to say "string.h"

contains some definitional values, but not the /source code/
for the strtok function.

These files will be found in your C include directory.

The files you named will be found there. However, the files the OP is looking for are unlikely to be found in his C include directory.

- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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My fault, I thought the OP was making a query as to the files he'd have
to include to make use of these functions. Obviously, "source code" for
each function would be found in their respective libc source file. Many
core functions have their own .h and .c file. For instance, the
implementation of malloc() is found in malloc.c. If the source files
for these functions exist on your system, they will be in your linux
source directory tree (usually /usr/src/linux). If not, download glibc
from http://www.gnu.org.

By the way, plz learn to quote properly.

[Lew Pitcher]

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dave windsor wrote:

Lew Pitcher wrote: [snip]
By the way, plz learn to quote properly.

I suggest that you either learn to read, or write a bug report to the Mozilla
foundation on the automated quoting process that Thunderbird uses. There's
nothing wrong with the way I quote - the attributions and related content were
intact, and my comments were inline, unquoted.
- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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[James McIninch]

There's no 'new' in C. sizeof is a C keyword, so download the source code
for your compiler and see how it is implemented. The others are part of the
C standard library, so download the source code for whichever C library you
are using and see how they implement the functions.

C doesn't proscribe how these things are implemented, only the semantics of
using them.

<posted & mailed>

Anil wrote:

Hi,

Where can I get the source code that has the implementation of the
below
C operators/functions:
malloc
sizeof
new
strcmp
strtok

etc.,

(any website points to the source code)

I am using Linux OS with GCC as my C compiler.

Thanks in advance,
Anil.

--
Remove '.nospam' from e-mail address to reply by e-mail

[CBFalconer]

Lew Pitcher wrote:

dave windsor wrote:

[snip]

By the way, plz learn to quote properly.

I suggest that you either learn to read, or write a bug report to
the Mozilla foundation on the automated quoting process that
Thunderbird uses. There's nothing wrong with the way I quote - the
attributions and related content were intact, and my comments were
inline, unquoted.

I suspect that he was complaining about the lack of snippage, and
the fact that there was no blank line between the quotation and
your comment.

--
"If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson

[Joona I Palaste]

dave windsor <nu******@gmail.com> scribbled the following:

By the way, plz learn to quote properly.

B th w, pls lrn t s vwls.

--
/-- Joona Palaste (pa*****@cc.helsinki.fi) ------------- Finland --------\
\-------------------------------------------------------- rules! --------/
"C++. C++ run. Run, ++, run."
- JIPsoft

[Keith Thompson]

Joona I Palaste <pa*****@cc.helsinki.fi> writes:

dave windsor <nu******@gmail.com> scribbled the following:

By the way, plz learn to quote properly.

B th w, pls lrn t s vwls.

Ll yr vwl r blng t s.

(Srr, cldn't rsst.)

--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

[dave windsor]

Lew Pitcher wrote:

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dave windsor wrote:

Lew Pitcher wrote: [snip]

By the way, plz learn to quote properly.

I suggest that you either learn to read, or write a bug report to the

Mozilla foundation on the automated quoting process that Thunderbird uses. There's nothing wrong with the way I quote - the attributions and related content were intact, and my comments were inline, unquoted.
- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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Interestingly enough, I deleted the post you're replying to in the
above post (unfortunately it had already made it through clc's and was
published). Why? I knew it'd generate unnecessary flamage. I was right,
FOUR posts directly related to the comment I made:

By the way, plz learn to quote properly.

Well, here's a fifth. Cheers to wasted bandwidth, time and triviality.

Perhaps a more tactful way to say what I was trying to express above
would be "Not to suggest that you are ignorant of the ways of usenet,
but quoting your own deleted post as a means of correcting
typographical errors is confusing; just post the original with the
corrections in place next time." I just thought, maybe, that you were
new to usenet and weren't aware of the precedents for posting that've
been in place for years. I was simply trying to indicate that you were
deviating from these precedents. The information you offered in your
reply is indeed very valuable, it's just formatted in a somewhat
counterintuitive way.

The fact that I felt compelled to type that last paragraph is
ridiculous. Suggesting *anything* to people is becoming quite tiresome.
-dave

[Jonathan Burd]

Keith Thompson wrote:

Joona I Palaste <pa*****@cc.helsinki.fi> writes:

dave windsor <nu******@gmail.com> scribbled the following:

By the way, plz learn to quote properly.

B th w, pls lrn t s vwls.

Ll yr vwl r blng t s.

(Srr, cldn't rsst.)

Ll, jz, u gys r hv fn t. (Srr, jst hvng sm fn).

--
"I'm learning to program because then I can write
programs to do my homework faster." - Andy Anfilofieff