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      1 /* ----------------------------------------------------------------------- *
      2  *
      3  *   Copyright 2007-2009 H. Peter Anvin - All Rights Reserved
      4  *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
      5  *
      6  *   Permission is hereby granted, free of charge, to any person
      7  *   obtaining a copy of this software and associated documentation
      8  *   files (the "Software"), to deal in the Software without
      9  *   restriction, including without limitation the rights to use,
     10  *   copy, modify, merge, publish, distribute, sublicense, and/or
     11  *   sell copies of the Software, and to permit persons to whom
     12  *   the Software is furnished to do so, subject to the following
     13  *   conditions:
     14  *
     15  *   The above copyright notice and this permission notice shall
     16  *   be included in all copies or substantial portions of the Software.
     17  *
     18  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     19  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
     20  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     21  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
     22  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     23  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     24  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     25  *   OTHER DEALINGS IN THE SOFTWARE.
     26  *
     27  * ----------------------------------------------------------------------- */
     28 
     29 /*
     30  * suffix_number.c
     31  *
     32  * Convert a string of a number with potential SI suffix to int-type
     33  */
     34 
     35 #include <stdlib.h>
     36 #include <suffix_number.h>
     37 
     38 /* Get a value with a potential suffix (k/m/g/t/p/e) */
     39 unsigned long long suffix_number(const char *str)
     40 {
     41     char *ep;
     42     unsigned long long v;
     43     int shift;
     44 
     45     v = strtoull(str, &ep, 0);
     46     switch (*ep | 0x20) {
     47     case 'k':
     48 	shift = 10;
     49 	break;
     50     case 'm':
     51 	shift = 20;
     52 	break;
     53     case 'g':
     54 	shift = 30;
     55 	break;
     56     case 't':
     57 	shift = 40;
     58 	break;
     59     case 'p':
     60 	shift = 50;
     61 	break;
     62     case 'e':
     63 	shift = 60;
     64 	break;
     65     default:
     66 	shift = 0;
     67 	break;
     68     }
     69     v <<= shift;
     70 
     71     return v;
     72 }
     73