1 /***************************************************************************
2 * Copyright (c) 2024 Microsoft Corporation
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the MIT License which is available at
6 * https://opensource.org/licenses/MIT.
7 *
8 * SPDX-License-Identifier: MIT
9 **************************************************************************/
10
11
12 /**************************************************************************/
13 /**************************************************************************/
14 /** */
15 /** USBX Component */
16 /** */
17 /** Utility */
18 /** */
19 /**************************************************************************/
20 /**************************************************************************/
21
22
23 /* Include necessary system files. */
24
25 #define UX_SOURCE_CODE
26
27 #include "ux_api.h"
28
29
30 /**************************************************************************/
31 /* */
32 /* FUNCTION RELEASE */
33 /* */
34 /* _ux_utility_unicode_to_string PORTABLE C */
35 /* 6.1 */
36 /* AUTHOR */
37 /* */
38 /* Chaoqiong Xiao, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* This function converts a unicode string to a zero terminated */
43 /* ascii string. */
44 /* */
45 /* INPUT */
46 /* */
47 /* source Unicode String */
48 /* destination Ascii String */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* none */
53 /* */
54 /* CALLS */
55 /* */
56 /* None */
57 /* */
58 /* CALLED BY */
59 /* */
60 /* USBX Components */
61 /* */
62 /* RELEASE HISTORY */
63 /* */
64 /* DATE NAME DESCRIPTION */
65 /* */
66 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
67 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
68 /* resulting in version 6.1 */
69 /* */
70 /**************************************************************************/
_ux_utility_unicode_to_string(UCHAR * source,UCHAR * destination)71 VOID _ux_utility_unicode_to_string(UCHAR *source, UCHAR *destination)
72 {
73 ULONG string_length;
74
75 /* Obtain the length of the unicode string. This is the first byte*/
76 string_length = (ULONG) *source++;
77
78 /* Parse the unicode string. First byte is always 0, second byte is the
79 ASCII character. */
80 while(string_length--)
81 {
82 /* First character is from the source. */
83 *destination++ = *source++;
84
85 /* Second character of unicode word is 0. */
86 source++;
87 }
88
89 /* We are done with the ascii string. Insert a zero at the end. */
90 *destination = 0;
91
92 /* Finished. */
93 return;
94 }
95
96
