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 /** FileX Component */
16 /** */
17 /** Media */
18 /** */
19 /**************************************************************************/
20 /**************************************************************************/
21
22 #define FX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "fx_api.h"
28 #include "fx_media.h"
29
30 FX_CALLER_CHECKING_EXTERNS
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _fxe_media_read PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* William E. Lamie, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function checks for errors in the media read call. */
46 /* */
47 /* INPUT */
48 /* */
49 /* media_ptr Media control block pointer */
50 /* logical_sector Logical sector to read */
51 /* buffer_ptr Pointer to caller's buffer */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* return status */
56 /* */
57 /* CALLS */
58 /* */
59 /* _fx_media_read Actual media read service */
60 /* */
61 /* CALLED BY */
62 /* */
63 /* Application Code */
64 /* */
65 /* RELEASE HISTORY */
66 /* */
67 /* DATE NAME DESCRIPTION */
68 /* */
69 /* 05-19-2020 William E. Lamie Initial Version 6.0 */
70 /* 09-30-2020 William E. Lamie Modified comment(s), */
71 /* resulting in version 6.1 */
72 /* */
73 /**************************************************************************/
_fxe_media_read(FX_MEDIA * media_ptr,ULONG logical_sector,VOID * buffer_ptr)74 UINT _fxe_media_read(FX_MEDIA *media_ptr, ULONG logical_sector, VOID *buffer_ptr)
75 {
76
77 UINT status;
78
79
80 /* Check for a null media pointer or buffer pointer. */
81 if ((media_ptr == FX_NULL) || (buffer_ptr == FX_NULL))
82 {
83 return(FX_PTR_ERROR);
84 }
85
86 /* Check for a valid caller. */
87 FX_CALLER_CHECKING_CODE
88
89 /* Call actual media read service. */
90 status = _fx_media_read(media_ptr, logical_sector, buffer_ptr);
91
92 /* Return status to the caller. */
93 return(status);
94 }
95
96
