fxe_file_read.c
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|---|---|---|---|
| 1 | /*************************************************************************** | ||
| 2 | * Copyright (c) 2024 Microsoft Corporation | ||
| 3 | * Copyright (c) 2026-present Eclipse ThreadX contributors | ||
| 4 | * | ||
| 5 | * This program and the accompanying materials are made available under the | ||
| 6 | * terms of the MIT License which is available at | ||
| 7 | * https://opensource.org/licenses/MIT. | ||
| 8 | * | ||
| 9 | * SPDX-License-Identifier: MIT | ||
| 10 | **************************************************************************/ | ||
| 11 | |||
| 12 | |||
| 13 | /**************************************************************************/ | ||
| 14 | /**************************************************************************/ | ||
| 15 | /** */ | ||
| 16 | /** FileX Component */ | ||
| 17 | /** */ | ||
| 18 | /** File */ | ||
| 19 | /** */ | ||
| 20 | /**************************************************************************/ | ||
| 21 | /**************************************************************************/ | ||
| 22 | |||
| 23 | #define FX_SOURCE_CODE | ||
| 24 | |||
| 25 | |||
| 26 | /* Include necessary system files. */ | ||
| 27 | |||
| 28 | #include "fx_api.h" | ||
| 29 | #include "fx_file.h" | ||
| 30 | |||
| 31 | FX_CALLER_CHECKING_EXTERNS | ||
| 32 | |||
| 33 | |||
| 34 | /**************************************************************************/ | ||
| 35 | /* */ | ||
| 36 | /* FUNCTION RELEASE */ | ||
| 37 | /* */ | ||
| 38 | /* _fxe_file_read PORTABLE C */ | ||
| 39 | /* 6.1 */ | ||
| 40 | /* AUTHOR */ | ||
| 41 | /* */ | ||
| 42 | /* William E. Lamie, Microsoft Corporation */ | ||
| 43 | /* */ | ||
| 44 | /* DESCRIPTION */ | ||
| 45 | /* */ | ||
| 46 | /* This function checks for errors in the read file call. */ | ||
| 47 | /* */ | ||
| 48 | /* INPUT */ | ||
| 49 | /* */ | ||
| 50 | /* file_ptr File control block pointer */ | ||
| 51 | /* buffer_ptr Buffer pointer */ | ||
| 52 | /* request_size Number of bytes requested */ | ||
| 53 | /* actual_size Pointer to variable for the */ | ||
| 54 | /* number of bytes read */ | ||
| 55 | /* */ | ||
| 56 | /* OUTPUT */ | ||
| 57 | /* */ | ||
| 58 | /* return status */ | ||
| 59 | /* */ | ||
| 60 | /* CALLS */ | ||
| 61 | /* */ | ||
| 62 | /* _fx_file_read Actual file read service */ | ||
| 63 | /* */ | ||
| 64 | /* CALLED BY */ | ||
| 65 | /* */ | ||
| 66 | /* Application Code */ | ||
| 67 | /* */ | ||
| 68 | /**************************************************************************/ | ||
| 69 | 158349312 | UINT _fxe_file_read(FX_FILE *file_ptr, VOID *buffer_ptr, ULONG request_size, ULONG *actual_size) | |
| 70 | { | ||
| 71 | |||
| 72 | UINT status; | ||
| 73 | |||
| 74 | |||
| 75 | /* Check for a null file or buffer pointer. */ | ||
| 76 |
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158349312 | if ((file_ptr == FX_NULL) || (buffer_ptr == FX_NULL) || (actual_size == FX_NULL)) |
| 77 | { | ||
| 78 | 1388 | return(FX_PTR_ERROR); | |
| 79 | } | ||
| 80 | |||
| 81 | /* Check for a valid caller. */ | ||
| 82 |
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80875490 | FX_CALLER_CHECKING_CODE |
| 83 | |||
| 84 | /* Call actual file read service. */ | ||
| 85 | 158345854 | status = _fx_file_read(file_ptr, buffer_ptr, request_size, actual_size); | |
| 86 | |||
| 87 | /* Return status to the caller. */ | ||
| 88 | 158345851 | return(status); | |
| 89 | } | ||
| 90 | |||
| 91 |