9 #include <string.h>

    20 static void

    21 bad_malloc(unsigned int size)

    22 {

    23 	fprintf(stderr, "fatal: could not malloc() %d bytes\n",

    24 			(int) size);

    25 	exit(1);

    26 }

    27 

    28 void *

    29 emallocz(unsigned int size)

    30 {

    31 	void *res = calloc(1, size);

    32 	if(!res)

    33 		bad_malloc(size);

    34 	return res;

    35 }

    36 

    37 void *

    38 emalloc(unsigned int size)

    39 {

    40 	void *res = malloc(size);

    41 	if(!res)

    42 		bad_malloc(size);

    43 	return res;

    44 }

    45 

    46 void *

    47 erealloc(void *ptr, unsigned int size)

    48 {

    49 	void *res = realloc(ptr, size);

    50 	if(!res)

    51 		bad_malloc(size);

    52 	return res;

    53 }

    54 

    55 char *

    56 estrdup(const char *str)

    57 {

    58 	void *res = strdup(str);

    59 	if(!res)

    60 		bad_malloc(strlen(str));

    61 	return res;

    62 }

    63 

    64 void

    65 failed_assert(char *a, char *file, int line)

    66 {

    67 	fprintf(stderr, "Assertion \"%s\" failed at %s:%d\n", a, file, line);

    68 	abort();

    69 }

    70 

    71 void

    72 swap(void **p1, void **p2)

    73 {

    74 	void *tmp = *p1;

    75 	*p1 = *p2;

    76 	*p2 = tmp;

    77 }