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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** FileX Component */ |
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/** */ |
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/** Directory */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define FX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "fx_api.h" |
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#include "fx_system.h" |
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#include "fx_directory.h" |
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#include "fx_utility.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _fx_directory_name_extract PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* William E. Lamie, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function extracts the file name from the supplied input */ |
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/* string. If there is nothing left after the extracted name, a NULL */ |
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/* is returned to the caller. Otherwise, if something is left, a */ |
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/* pointer to it is returned. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* source_ptr Source string pointer */ |
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/* dest_ptr Destination string pointer */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Pointer to Next Name (if multiple directories) */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* FileX System Functions */ |
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/* */ |
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/**************************************************************************/ |
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261818 |
CHAR *_fx_directory_name_extract(CHAR *source_ptr, CHAR *dest_ptr) |
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{ |
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UINT i; |
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/* Set the destination string to NULL. */ |
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dest_ptr[0] = 0; |
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/* Is a backslash present? */ |
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✓✓✓✓
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if ((*source_ptr == '\\') || (*source_ptr == '/')) |
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{ |
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/* Advance the string pointer. */ |
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source_ptr++; |
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} |
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/* Loop to remove any leading spaces. */ |
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✓✓ |
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while (*source_ptr == ' ') |
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{ |
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/* Position past leading space. */ |
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source_ptr++; |
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} |
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/* Loop to extract the name. */ |
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i = 0; |
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✓✓ |
2584437 |
while (*source_ptr) |
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{ |
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/* If another backslash is present, break the loop. */ |
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✓✓✓✓
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if ((*source_ptr == '\\') || (*source_ptr == '/')) |
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{ |
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break; |
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} |
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/* Long name can be at most 255 characters, but are further limited by the |
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FX_MAX_LONG_NAME_LEN define. */ |
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✓✓ |
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if (i == FX_MAX_LONG_NAME_LEN - 1) |
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{ |
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break; |
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} |
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/* Store the character. */ |
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dest_ptr[i] = *source_ptr++; |
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/* Increment the character counter. */ |
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2322619 |
i++; |
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} |
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/* NULL-terminate the string. */ |
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dest_ptr[i] = 0; |
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/* Determine if we can backup to the previous character. */ |
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✓✓ |
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if (i) |
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{ |
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/* Yes, we can move backwards. */ |
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i--; |
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} |
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/* Get rid of trailing blanks in the destination string. */ |
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✓✓ |
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while (dest_ptr[i] == ' ') |
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{ |
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/* Set this entry to NULL. */ |
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dest_ptr[i] = 0; |
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/* Backup to the next character. Since leading spaces have been removed, |
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we know that the index is always greater than 1. */ |
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i--; |
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} |
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/* Determine if the source string is now at the end. */ |
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✓✓ |
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if (*source_ptr == 0) |
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{ |
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/* Yes, return a NULL pointer. */ |
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source_ptr = FX_NULL; |
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} |
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/* Return the last pointer position in the source. */ |
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return(source_ptr); |
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} |
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