09-02-2008
Quote:
Originally Posted by
naan
Hi,
I am trying to process line by line of a file. But I should not be allocating static allocation for reading the contents of the file. The memory should be dynamically allocated. The confusion here is how do I determine the size of each line, put it into a buffer with the memory allocated with the size of the line?
Is there any optimised way to do this?
Thanks,
Anitha
Any compelling reason to go for a dynamic solution??
A static solution may not be optimized but a dynamic solution would be expensive in terms of mp units.
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LEARN ABOUT LINUX
reallocf
MALLOC(3) BSD Library Functions Manual MALLOC(3)
NAME
reallocf -- general purpose memory allocation functions
LIBRARY
Utility functions from BSD systems (libbsd, -lbsd)
SYNOPSIS
#include <bsd/stdlib.h>
void *
reallocf(void *ptr, size_t size);
DESCRIPTION
The reallocf() function changes the size of the previously allocated memory referenced by ptr to size bytes. The contents of the memory are
unchanged up to the lesser of the new and old sizes. If the new size is larger, the contents of the newly allocated portion of the memory
are undefined. Upon success, the memory referenced by ptr is freed and a pointer to the newly allocated memory is returned. Note that
reallocf() may move the memory allocation, resulting in a different return value than ptr. If ptr is NULL, the reallocf() function behaves
identically to malloc() for the specified size. Upon failure, when the requested memory cannot be allocated, the passed pointer is freed to
ease the problems with traditional coding styles for reallocf() causing memory leaks in libraries.
RETURN VALUES
The reallocf() function returns a pointer, possibly identical to ptr, to the allocated memory if successful; otherwise a NULL pointer is
returned, and errno is set to ENOMEM if the error was the result of an allocation failure. The buffer is deallocated in this case.
SEE ALSO
brk(2), mmap(2), alloca(3), calloc(3), free(3), malloc(3), posix_memalign(3), realloc(3),
HISTORY
The reallocf() function first appeared in FreeBSD 3.0.
BSD
September 26, 2009 BSD