[count] Use correct integral type

Make the types consistent with each other, and return size_t instead of a long int.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D126121

llvm/utils/count/count.c

@@ -10,23 +10,23 @@
 #include <stdio.h>
 
 int main(int argc, char **argv) {
-  unsigned Count, NumLines, NumRead;
+  size_t Count, NumLines, NumRead;
   char Buffer[4096], *End;
 
   if (argc != 2) {
     fprintf(stderr, "usage: %s <expected line count>\n", argv[0]);
     return 2;
   }
 
-  Count = strtol(argv[1], &End, 10);
+  Count = strtoul(argv[1], &End, 10);
   if (*End != '\0' && End != argv[1]) {
     fprintf(stderr, "%s: invalid count argument '%s'\n", argv[0], argv[1]);
     return 2;
   }
 
   NumLines = 0;
   do {
-    unsigned i;
+    size_t i;
 
     NumRead = fread(Buffer, 1, sizeof(Buffer), stdin);
 
@@ -41,7 +41,7 @@ int main(int argc, char **argv) {
   }
 
   if (Count != NumLines) {
-    fprintf(stderr, "Expected %d lines, got %d.\n", Count, NumLines);
+    fprintf(stderr, "Expected %zu lines, got %zu.\n", Count, NumLines);
     return 1;
   }