08-16-2011
Inside your code are you checking and printing the error returned by realloc when it fails to allocate memory...and can you post that error message here.
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1. Programming
Can Any body give me a exampla which has the usage of realloc
i want a function which uses realloc & increases /decreases the size of a pointer (0 Replies)
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2. Programming
Hello,
my program works properly but valgrind tells me I am not freeing allocated memory. I think the problem is in realloc.
I am pretty sure I do something wrong with realloc, because I changed it a bit and valgrind noticed less errors (that the program wasn't working properly with less errors... (3 Replies)
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3. Programming
hi,
I'm using gcc version 3.4.6 on a Red Hat system... (not sure how to determine version of glibc)
when i run the following, i get:
glibc detected *** realloc(): invalid next size: 0x0804a170
I'm not sure what is wrong. The error happens on the second iteration of
the while loop.... (3 Replies)
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4. Programming
N00B here. This function would be easier using a char pointer along with free. But I wish to learn how to use char static pointers (they do not require free, right ?).
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5. Programming
Why when using realloc, john is reversed 3 times but not the other 2 names ? But if I use malloc, then the 3 names are reversed correctly ? (but then there is a memory leak)
How can I reverse all 3 names without a memory leak ?
char *BUFFER = NULL;
char *STRREVERSE(const char *STRING)
{... (5 Replies)
Discussion started by: cyler
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6. Programming
Hi,
I am seeing varying results about, when realloc() fails in reallocation.
Which one is correct out of the below?
a) realloc() maintains the original pointer (i.e) the original pointer is left unaltered/untouched but relloc() returns the NULL value.
b) original buffer pointer is lost... (3 Replies)
Discussion started by: royalibrahim
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7. Programming
Hi all
I'm trying to use someone else's software, which has a realloc that fails in it. This is probably due to memory limitations, as it only happens when I use this software on huge datasets.
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Discussion started by: jossojjos
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8. Programming
b = realloc(a, 1000);
if realloc succeeds and b!=a (not in-place replacement), does realloc automatically free a or I should free both a and b afterwards?
thank you! (5 Replies)
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9. UNIX for Dummies Questions & Answers
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int*
allocat_array(void)
{
int *array;
int tmp;
int n_values = 0 ;
array = malloc(sizeof(int));
if(array == NULL)
return NULL;
while(scanf("%d",&tmp) != EOF)
{
... (1 Reply)
Discussion started by: vincent__tse
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10. Programming
Hi everyone,
i made this program. is a simple one for practising malloc, realloc and structs.
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I insert the values with the fullarray() and after i print the matrix with... (7 Replies)
Discussion started by: giampoul
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XMALLOC(3pub) C Programmer's Manual XMALLOC(3pub)
NAME
xmalloc, xrealloc, xfree, xstrdup, xmemdup, memdup - memory allocation functions for Publib
SYNOPSIS
#include <publib.h>
void *xmalloc(size_t bytes);
void *xrealloc(void *ptr, size_t bytes);
void xfree(void *ptr);
char *xstrdup(const char *string);
void *memdup(const void *mem, size_t bytes);
void *xmemdup(const void *mem, size_t bytes);
DESCRIPTION
These functions are utility functions for memory allocation from the publib library. xmalloc, xrealloc, and xfree are error checking ver-
sions of the standard library routines malloc, realloc, and free, respectively. They are guaranteed to never return unless there was no
problem: if, for example, xmalloc is unable to allocate the requested amount of memory, it prints an error message and terminates the pro-
gram. Hence, the caller does not need to check for a NULL return value, and the code that calls these functions is simpler due to the lack
of error checks.
Similarly, xstrdup is an error checking version of the common (though not standard) strdup routine, which creates a duplicate of a string
by allocating memory for the copy with malloc. (For systems that lack strdup, publib provides one in its portability module; it is always
declared in <publib.h>.)
memdup is similar to strdup, it creates a copy of an arbitrary memory area (the arguments are a pointer to the beginning of the area, and
its size) by allocating memory for the copy with malloc. xmemdup is its error checking version.
NOTE
xmalloc and xrealloc treat a request to allocate a block of 0 bytes as an error. xrealloc will allow its first argument to be NULL.
SEE ALSO
publib(3), malloc(3), strdup(3)
AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual XMALLOC(3pub)