| 1 | /* Libiberty dirname. Like dirname, but is not overridden by the |
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| 2 | system C library. |
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| 3 | Copyright (C) 2025 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | This file is part of the libiberty library. |
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| 6 | Libiberty is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Library General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | Libiberty is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Library General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Library General Public |
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| 17 | License along with libiberty; see the file COPYING.LIB. If |
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| 18 | not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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| 19 | Boston, MA 02110-1301, USA. */ |
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| 20 | |
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| 21 | /* |
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| 22 | |
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| 23 | @deftypefn Replacement {char*} ldirname (const char *@var{name}) |
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| 24 | |
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| 25 | Given a pointer to a string containing a typical pathname |
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| 26 | (@samp{/usr/src/cmd/ls/ls.c} for example), returns a string containing the |
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| 27 | passed string up to, but not including, the final directory separator. |
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| 28 | |
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| 29 | If the given pathname doesn't contain a directory separator then this funtion |
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| 30 | returns the empty string; this includes an empty given pathname. @code{NULL} |
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| 31 | is returned on memory allocation error. |
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| 32 | |
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| 33 | @end deftypefn |
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| 34 | |
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| 35 | */ |
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| 36 | |
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| 37 | #ifdef HAVE_CONFIG_H |
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| 38 | #include "config.h" |
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| 39 | #endif |
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| 40 | #include "ansidecl.h" |
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| 41 | #include "libiberty.h" |
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| 42 | #include "safe-ctype.h" |
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| 43 | #include "filenames.h" |
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| 44 | |
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| 45 | /* For malloc. */ |
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| 46 | #ifdef HAVE_STDLIB_H |
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| 47 | #include <stdlib.h> |
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| 48 | #endif |
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| 49 | |
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| 50 | /* For memcpy. */ |
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| 51 | # if HAVE_STRING_H |
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| 52 | # include <string.h> |
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| 53 | # else |
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| 54 | # if HAVE_STRINGS_H |
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| 55 | # include <strings.h> |
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| 56 | # endif |
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| 57 | # endif |
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| 58 | |
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| 59 | #define LDIRNAME(FPREFIX,DIRSEP) \ |
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| 60 | char *FPREFIX##_ldirname (const char *name) \ |
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| 61 | { \ |
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| 62 | /* Note that lbasename guarantees that the returned */ \ |
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| 63 | /* pointer lies within the passed string. */ \ |
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| 64 | const char *basename = FPREFIX##_lbasename (name); \ |
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| 65 | size_t size = basename - name; \ |
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| 66 | char *res = NULL; \ |
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| 67 | \ |
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| 68 | res = (char*) malloc (size + 1); \ |
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| 69 | if (res != NULL) \ |
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| 70 | { \ |
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| 71 | if (size > 0) \ |
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| 72 | { \ |
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| 73 | if (IS_DIR_SEPARATOR_1 ((DIRSEP),name[size - 1])) \ |
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| 74 | size -= 1; \ |
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| 75 | memcpy (res, name, size); \ |
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| 76 | } \ |
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| 77 | res[size] = '\0'; \ |
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| 78 | } \ |
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| 79 | \ |
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| 80 | return res; \ |
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| 81 | } |
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| 82 | |
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| 83 | LDIRNAME(dos,1) |
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| 84 | LDIRNAME(unix,0) |
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| 85 | |
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| 86 | char * |
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| 87 | ldirname (const char *name) |
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| 88 | { |
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| 89 | #if defined (HAVE_DOS_BASED_FILE_SYSTEM) |
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| 90 | return dos_ldirname (name); |
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| 91 | #else |
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| 92 | return unix_ldirname (name); |
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| 93 | #endif |
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| 94 | } |
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| 95 | |
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