tests: Portability fixes, replaced 0/1/-1 return codes with macros

tests/string/mem.c

@@ -9,7 +9,7 @@ int main(void) {
     arr[50] = 1;
     if ((size_t)memchr((void *)arr, 1, 100) - (size_t)arr != 50) {
         puts("Incorrect memchr");
-        exit(1);
+        return EXIT_FAILURE;
     }
     puts("Correct memchr");
     char arr2[51];
@@ -17,26 +17,26 @@ int main(void) {
     memccpy((void *)arr2, (void *)arr, 1, 100);
     if (arr[50] != 1) {
         puts("Incorrect memccpy");
-        exit(1);
+        return EXIT_FAILURE;
     }
     puts("Correct memccpy");
     int res;
     if ((res = memcmp("hello world", "hello world", 11))) {
         printf("Incorrect memcmp (1), expected 0 found %d\n", res);
-        exit(1);
+        return EXIT_FAILURE;
     }
     if ((res = memcmp("hello world", "hello worlt", 11)) >= 0) {
         printf("Incorrect memcmp (2), expected -, found %d\n", res);
-        exit(1);
+        return EXIT_FAILURE;
     }
     if ((res = memcmp("hello world", "hallo world", 5)) <= 0) {
         printf("Incorrect memcmp (3), expected +, found %d\n", res);
-        exit(1);
+        return EXIT_FAILURE;
     }
     if ((res = memcmp("hello world", "henlo world", 5)) >= 0) {
         printf("Incorrect memcmp (4), expected -, found %d\n", res);
-        exit(1);
+        return EXIT_FAILURE;
     }
     puts("Correct memcmp");
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strcat.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
     char dest1[12] = "hello";
@@ -8,5 +9,5 @@ int main(void) {
     char dest2[12] = "hello";
   	printf("%s\n", strncat(dest2, " world foobar", 6)); // should be hello world
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strchr.c

@@ -1,10 +1,11 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
 	printf("%s\n", strchr("hello", 'e')); // should be ello
 	printf("%s\n", strchr("world", 'l')); // should be ld
 	printf("%i\n", strchr("world", 0) == NULL); // should be 1
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strcspn.c

@@ -1,10 +1,11 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
 	char *world = "world";
 	printf("%ld\n", strcspn("hello", world)); // should be 2
 	printf("%ld\n", strcspn("banana", world)); // should be 6
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strncmp.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
     printf("%d\n", strncmp("a", "aa", 2));
@@ -9,5 +10,5 @@ int main(void) {
     printf("%d\n", strncmp("a", "c", 1));
     printf("%d\n", strncmp("a", "a", 2));
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strpbrk.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
     char* source = "The quick drawn fix jumps over the lazy bug";
@@ -16,5 +17,5 @@ int main(void) {
     char* res3 = strpbrk(source, "404");
     printf("%s\n", (res3) ? res3 : "NULL"); 
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strrchr.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
   char s0[] = "hello, world";
@@ -7,15 +8,15 @@ int main(void) {
   if (ptr != &s0[10]) {
     printf("%p != %p\n", ptr, &s0[10]);
     printf("strrchr FAIL , exit with status code %d\n", 1);
-    return 1;
+    return EXIT_FAILURE;
   }
   char s1[] = "";
   ptr = strrchr(s1, 'a');
   if (ptr != NULL) {
     printf("%p != 0\n", ptr);
     printf("strrchr FAIL, exit with status code %d\n", 1);
-    return 1;
+    return EXIT_FAILURE;
   }
   printf("strrch PASS, exiting with status code %d\n", 0);
-  return 0;
+  return EXIT_SUCCESS;
 }

tests/string/strspn.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
 	char *hello = "hello";
@@ -9,5 +10,5 @@ int main(void) {
 	printf("%lu\n", strspn(world, "wendy")); // should be 1
 	printf("%lu\n", strspn(banana, "apple")); // should be 0
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strstr.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
     printf("%s\n", strstr("In relibc we trust", "rust"));
@@ -8,5 +9,5 @@ int main(void) {
     printf("%s\n", strstr("IN RELIBC WE TRUST", "rust"));
     printf("%s\n", strcasestr("IN RELIBC WE TRUST", "rust"));
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strtok.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
     char source[] = "I'd just like to interject for a moment.  What you're referring to as Linux, "
@@ -13,5 +14,5 @@ int main(void) {
         }
     }
 
-    return 0;
+    return EXIT_SUCCESS;
 }

tests/string/strtok_r.c

@@ -1,5 +1,6 @@
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(void) {
     char source[] = "I'd just like to interject for a moment.  What you're referring to as Linux, "
@@ -14,5 +15,5 @@ int main(void) {
         }
     }
 
-    return 0;
+    return EXIT_SUCCESS;
 }