drivers/staging/tidspbridge/gen/uuidutil.c

   1 /*
   2  * uuidutil.c
   3  *
   4  * DSP-BIOS Bridge driver support functions for TI OMAP processors.
   5  *
   6  * This file contains the implementation of UUID helper functions.
   7  *
   8  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   9  *
  10  * This package is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  16  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  17  */
  18 #include <linux/types.h>
  19
  20 /*  ----------------------------------- Host OS */
  21 #include <dspbridge/host_os.h>
  22
  23 /*  ----------------------------------- DSP/BIOS Bridge */
  24 #include <dspbridge/dbdefs.h>
  25
  26 /*  ----------------------------------- Trace & Debug */
  27 #include <dspbridge/dbc.h>
  28
  29 /*  ----------------------------------- This */
  30 #include <dspbridge/uuidutil.h>
  31
  32 /*
  33  *  ======== uuid_uuid_to_string ========
  34  *  Purpose:
  35  *      Converts a struct dsp_uuid to a string.
  36  *      Note: snprintf format specifier is:
  37  *      %[flags] [width] [.precision] [{h | l | I64 | L}]type
  38  */
  39 void uuid_uuid_to_string(struct dsp_uuid *uuid_obj, char *sz_uuid,
  40                          s32 size)
  41 {
  42         s32 i;                  /* return result from snprintf. */
  43
  44         DBC_REQUIRE(uuid_obj && sz_uuid);
  45
  46         i = snprintf(sz_uuid, size,
  47                      "%.8X_%.4X_%.4X_%.2X%.2X_%.2X%.2X%.2X%.2X%.2X%.2X",
  48                      uuid_obj->data1, uuid_obj->data2, uuid_obj->data3,
  49                      uuid_obj->data4, uuid_obj->data5,
  50                      uuid_obj->data6[0], uuid_obj->data6[1],
  51                      uuid_obj->data6[2], uuid_obj->data6[3],
  52                      uuid_obj->data6[4], uuid_obj->data6[5]);
  53
  54         DBC_ENSURE(i != -1);
  55 }
  56
  57 static s32 uuid_hex_to_bin(char *buf, s32 len)
  58 {
  59         s32 i;
  60         s32 result = 0;
  61         int value;
  62
  63         for (i = 0; i < len; i++) {
  64                 value = hex_to_bin(*buf++);
  65                 result *= 16;
  66                 if (value > 0)
  67                         result += value;
  68         }
  69
  70         return result;
  71 }
  72
  73 /*
  74  *  ======== uuid_uuid_from_string ========
  75  *  Purpose:
  76  *      Converts a string to a struct dsp_uuid.
  77  */
  78 void uuid_uuid_from_string(char *sz_uuid, struct dsp_uuid *uuid_obj)
  79 {
  80         s32 j;
  81
  82         uuid_obj->data1 = uuid_hex_to_bin(sz_uuid, 8);
  83         sz_uuid += 8;
  84
  85         /* Step over underscore */
  86         sz_uuid++;
  87
  88         uuid_obj->data2 = (u16) uuid_hex_to_bin(sz_uuid, 4);
  89         sz_uuid += 4;
  90
  91         /* Step over underscore */
  92         sz_uuid++;
  93
  94         uuid_obj->data3 = (u16) uuid_hex_to_bin(sz_uuid, 4);
  95         sz_uuid += 4;
  96
  97         /* Step over underscore */
  98         sz_uuid++;
  99
 100         uuid_obj->data4 = (u8) uuid_hex_to_bin(sz_uuid, 2);
 101         sz_uuid += 2;
 102
 103         uuid_obj->data5 = (u8) uuid_hex_to_bin(sz_uuid, 2);
 104         sz_uuid += 2;
 105
 106         /* Step over underscore */
 107         sz_uuid++;
 108
 109         for (j = 0; j < 6; j++) {
 110                 uuid_obj->data6[j] = (u8) uuid_hex_to_bin(sz_uuid, 2);
 111                 sz_uuid += 2;
 112         }
 113 }