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memutil.c
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memutil.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "err.h"
#include "memutil.h"
/**
* Wrapper for malloc that prints an error message and exits
* if memory could not be allocated
*/
void *my_malloc(size_t n_bytes) {
void *mem;
mem = malloc(n_bytes);
if(!mem) {
my_err("%s:%d: could not allocate %ld bytes of memory\n",
__FILE__, __LINE__, n_bytes);
}
return mem;
}
/**
* Wrapper for malloc that allocates memory and
* then sets every byte to 0 (NULL).
*/
void *my_malloc0(size_t n_bytes) {
void *mem;
mem = my_malloc(n_bytes);
memset(mem, 0, n_bytes);
return mem;
}
/**
* Wrapper around free that checks that provided
* ptr is not NULL before calling free
*/
void __MY_FREE(void *ptr, const char *filename, const int line_num) {
if(ptr == NULL) {
my_err("%s:%d: attempt to free NULL ptr at: %s:%d\n",
__FILE__, __LINE__, filename, line_num);
}
free(ptr);
}