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tostr.h revision 1.1 
      1 /*
      2  * tostr.h - DTrace To-String include file.
      3  *
      4  * $Id: tostr.h,v 1.1 2015/09/30 22:01:09 christos Exp $
      5  *
      6  * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
      7  *
      8  * CDDL HEADER START
      9  *
     10  *  The contents of this file are subject to the terms of the
     11  *  Common Development and Distribution License, Version 1.0 only
     12  *  (the "License").  You may not use this file except in compliance
     13  *  with the License.
     14  *
     15  *  You can obtain a copy of the license at Docs/cddl1.txt
     16  *  or http://www.opensolaris.org/os/licensing.
     17  *  See the License for the specific language governing permissions
     18  *  and limitations under the License.
     19  *
     20  * CDDL HEADER END
     21  *
     22  * 16-Sep-2007	Brendan Gregg	Created this.
     23  */
     24 
     25 /*
     26  * NUM_TO_STR(n) - takes a number and returns a string with a prefix,
     27  *	intended to fit withen 6 chars.
     28  *
     29  *	Input		Output
     30  *	0		0
     31  *	1		1
     32  *	10		10
     33  *	999		999
     34  *	1000		1.0K
     35  *	1100		1.1K
     36  *	10000		10.0K
     37  *	999999		999.0K
     38  * 	1000000		1.0M
     39  * 	10000000	10.0M
     40  * 	999999999	999.9M
     41  */
     42 #define	NUM_TO_STR(n)							\
     43 	n >= 1000000 ?							\
     44 	strjoin(strjoin(strjoin(lltostr(n / 1000000), "."), 		\
     45 	lltostr((n % 1000000) / 100000)), "M") : n >= 1000 ?		\
     46 	strjoin(strjoin(strjoin(lltostr(n / 1000), "."), 		\
     47 	lltostr((n % 1000) / 100)), "K") : lltostr(n)
     48 
     49 /*
     50  * BYTES_TO_STR(n) - takes a byte count and returns a string with a prefix,
     51  *	intended to fit withen 6 chars.
     52  *
     53  *	Input		Output
     54  *	0		0
     55  *	1		1
     56  *	10		10
     57  *	999		0.9K
     58  *	1000		0.9K
     59  *	1024		1.0K
     60  *	10240		10.0K
     61  *	1000000		976.5K
     62  * 	1048576		1.0M
     63  * 	1000000000	953.6M
     64  */
     65 #define	BYTES_TO_STR(n)							\
     66 	n >= 1024000 ?							\
     67 	strjoin(strjoin(strjoin(lltostr(n / 1048576), "."), 		\
     68 	lltostr((n % 1048576) / 104858)), "M") : n >= 1000 ?		\
     69 	strjoin(strjoin(strjoin(lltostr(n / 1024), "."), 		\
     70 	lltostr((n % 1024) / 103)), "K") : lltostr(n)
     71 
     72 /*
     73  * US_TO_STR(n) - takes microseconds and returns a string with a prefix,
     74  *	intended to fit withen 6 chars.
     75  *
     76  *	Input		Output
     77  *	0		0
     78  *	1		1u
     79  *	10		10u
     80  *	999		999u
     81  *	1000		1.0m
     82  *	1100		1.1m
     83  *	10000		10.0m
     84  *	999999		999.0m
     85  */
     86 #define	US_TO_STR(n)							\
     87 	n == 0 ? "0" : n >= 1000 ?					\
     88 	strjoin(lltostr(n / 1000), "m") : strjoin(lltostr(n), "u")
     89 
     90