update comments.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40129 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

pack.c

@@ -675,62 +675,62 @@ pack_pack(VALUE ary, VALUE fmt)
 	    }
 	    break;
 
-	  case 's':		/* signed short */
+	  case 's':		/* s for int16_t, s! for signed short */
             integer_size = NATINT_LEN(short, 2);
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'S':		/* unsigned short */
+	  case 'S':		/* S for uint16_t, S! for unsigned short */
             integer_size = NATINT_LEN(short, 2);
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'i':		/* signed int */
+	  case 'i':		/* i and i! for signed int */
             integer_size = (int)sizeof(int);
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'I':		/* unsigned int */
+	  case 'I':		/* I and I! for unsigned int */
             integer_size = (int)sizeof(int);
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'l':		/* signed long */
+	  case 'l':		/* l for int32_t, l! for signed long */
             integer_size = NATINT_LEN(long, 4);
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'L':		/* unsigned long */
+	  case 'L':		/* L for uint32_t, L! for unsigned long */
             integer_size = NATINT_LEN(long, 4);
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'q':		/* signed long long or int64_t */
+	  case 'q':		/* q for int64_t, q! for signed long long */
 	    integer_size = NATINT_LEN_Q;
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'Q':		/* unsigned long long or uint64_t */
+	  case 'Q':		/* Q for uint64_t, Q! for unsigned long long */
 	    integer_size = NATINT_LEN_Q;
             bigendian_p = BIGENDIAN_P();
             goto pack_integer;
 
-	  case 'n':		/* unsigned short (network byte-order)  */
+	  case 'n':		/* 16 bit (2 bytes) integer (network byte-order)  */
             integer_size = 2;
             bigendian_p = 1;
             goto pack_integer;
 
-	  case 'N':		/* unsigned long (network byte-order) */
+	  case 'N':		/* 32 bit (4 bytes) integer (network byte-order) */
             integer_size = 4;
             bigendian_p = 1;
             goto pack_integer;
 
-	  case 'v':		/* unsigned short (VAX byte-order) */
+	  case 'v':		/* 16 bit (2 bytes) integer (VAX byte-order) */
             integer_size = 2;
             bigendian_p = 0;
             goto pack_integer;
 
-	  case 'V':		/* unsigned long (VAX byte-order) */
+	  case 'V':		/* 32 bit (4 bytes) integer (VAX byte-order) */
             integer_size = 4;
             bigendian_p = 0;
             goto pack_integer;