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75 lines
2.0 KiB
75 lines
2.0 KiB
/* basename.c -- return the last element in a file name |
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Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2017 Free Software |
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Foundation, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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#include <config.h> |
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#include "dirname.h" |
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#include <string.h> |
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/* Return the address of the last file name component of NAME. If |
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NAME has no relative file name components because it is a file |
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system root, return the empty string. */ |
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char * |
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last_component (char const *name) |
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{ |
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char const *base = name + FILE_SYSTEM_PREFIX_LEN (name); |
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char const *p; |
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bool saw_slash = false; |
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while (ISSLASH (*base)) |
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base++; |
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for (p = base; *p; p++) |
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{ |
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if (ISSLASH (*p)) |
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saw_slash = true; |
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else if (saw_slash) |
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{ |
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base = p; |
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saw_slash = false; |
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} |
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} |
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return (char *) base; |
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} |
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/* Return the length of the basename NAME. Typically NAME is the |
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value returned by base_name or last_component. Act like strlen |
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(NAME), except omit all trailing slashes. */ |
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size_t |
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base_len (char const *name) |
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{ |
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size_t len; |
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size_t prefix_len = FILE_SYSTEM_PREFIX_LEN (name); |
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for (len = strlen (name); 1 < len && ISSLASH (name[len - 1]); len--) |
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continue; |
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if (DOUBLE_SLASH_IS_DISTINCT_ROOT && len == 1 |
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&& ISSLASH (name[0]) && ISSLASH (name[1]) && ! name[2]) |
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return 2; |
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if (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE && prefix_len |
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&& len == prefix_len && ISSLASH (name[prefix_len])) |
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return prefix_len + 1; |
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return len; |
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}
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