std::realloc is dangerous in c++ if the malloc'd memory contains non-pod types. It seems the only problem is that std::realloc wont call the type destructors if it cannot grow the memory in situ. ...

I'm trying to add 10 more elements to my struct that has been already malloc with a fixed sized of 20. This is the way I have my struct defined: #include <stdio.h> #include <stdlib.h> ...

In an earlier question, I asked about typecasting pointers, but was directed to the better solution of using the C++ allocation system instead of mallocs. (I am converting some C code to C++) Howe...

The realloc reference says: The function may move the memory block to a new location, in which case the new location is returned. Does it mean that if I do this: void foo() { void* ptr = ...

When we reallocate memory via realloc(), are the previous contents over-written? I am trying to make a program which reallocates memory each time we enter the data into it. Please tell me about m...

I encountered this small piece of code in this question, & wanted to know, Can the realloc() function ever move a memory block to another location, when the memory space pointed to is shrinked...

While there are lots of different sophisticated implementations of malloc / free for C/C++, I'm looking for a really simple and (especially) small one that works on a fixed-size buffer and supports...

realloc is used to reallocate the memory dynamically. Suppose I have allocated 7 bytes using the malloc function and now I want to extend it to 30 bytes. What will happen in the background if the...

how does realloc know the size of original data? void *realloc(void *ptr, size_t size); So, if the implementation is like this: temp = malloc(size); memcpy(.. // How much to copy? free(ptr)...

Can anyone summarize what is the correct usage of realloc()? What do you do when realloc() fails? From what I have seen so far, it seems that if realloc() fails, you have to free() old pointer. I...

I have a function which reallocs a pointer given as an argument to a new size. Now, the problem is that - according to the man page - realloc needs a pointer which has been returned by malloc or ca...

In C the standard memory handling functions are malloc(), realloc() and free(). However, C++ stdlib allocators only parallel two of them: there is no reallocation function. Of course, it would not ...

I'm having a problem with the realloc function. I'm using C only (so no vector) with LibCurl. The problem I'm having is that I'm getting the following error (realloc(): invalid next size) on ...

Given the following code: int *a = NULL; a = calloc(1, sizeof(*a)); printf("%d\n", a); a = realloc(a, 0); printf("%d\n", a); return (0); It returns: 4078904 0 Is this realloc equivalent to a...

I am porting a project to the iPhone and it uses realloc and memcpy which are not found. What is the header to include? It's a project mixing Objective C and C++ and I am starting to be lost. Tha...

What does malloc(0) return? Would the answer be same for realloc(malloc(0),0)? #include<stdio.h> #include<malloc.h> int main() { printf("%p\n", malloc(0)); printf("%p\n", real...

In C++, I believe, a better way of dealing with reallocation is to use a STL vectors, as it guarantees the contiguous storage locations. I have couple question to understand the difference: Is the...

I'm trying to create a function which takes an array as an argument, adds values to it (increasing its size if necessary) and returns the count of items. So far I have: int main(int argc, char** a...