Date: Mon, 13 May 2002 19:06:57 +0200 (MEST) From: Paul Everlund <tdv94ped@cs.umu.se> To: <freebsd-questions@freebsd.org> Subject: C malloc question Message-ID: <Pine.GSO.4.33.0205131845160.22929-100000@gren.cs.umu.se>
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Hi all!
I have a question regarding malloc and returning arrays in C.
The following C program is an example.
#include <stdlib.h>
#include <string.h>
static char *init()
{
char *str;
int i;
str = (char *)malloc(sizeof(char), 128);
for(i = 0; i < 127; i++)
str[i] = "A";
str[i] = '\0';
return str;
}
int main()
{
int i;
for(i = 0; i < 500000; i++)
init();
printf("%s\n", init());
return 0;
}
This program takes up a lot of malloc'ed memory after a while,
so how do one return arrays and free memory in the main function
everytime the array have been used? I would like to not use fix-
ed size arrays, as the real function should be general enough
to handle all kind of array sizes.
As the size is known in the main function, I guess I could send
in a buffer to get the data, as in init(char *buf), but I would
like to avoid this.
What is the best solution for this problem?
Thanks a lot in advance!
Best regards,
Paul
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