diff options
Diffstat (limited to 'libc/bionic/basename_r.c')
-rw-r--r-- | libc/bionic/basename_r.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libc/bionic/basename_r.c b/libc/bionic/basename_r.c new file mode 100644 index 0000000..e9080f0 --- /dev/null +++ b/libc/bionic/basename_r.c @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2008 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#include <libgen.h> +#include <errno.h> +#include <string.h> +#include <sys/param.h> + +int +basename_r(const char* path, char* buffer, size_t bufflen) +{ + const char *endp, *startp; + int len, result; + char temp[2]; + + /* Empty or NULL string gets treated as "." */ + if (path == NULL || *path == '\0') { + startp = "."; + len = 1; + goto Exit; + } + + /* Strip trailing slashes */ + endp = path + strlen(path) - 1; + while (endp > path && *endp == '/') + endp--; + + /* All slashes becomes "/" */ + if (endp == path && *endp == '/') { + startp = "/"; + len = 1; + goto Exit; + } + + /* Find the start of the base */ + startp = endp; + while (startp > path && *(startp - 1) != '/') + startp--; + + len = endp - startp +1; + +Exit: + result = len; + if (buffer == NULL) { + return result; + } + if (len > (int)bufflen-1) { + len = (int)bufflen-1; + result = -1; + errno = ERANGE; + } + + if (len >= 0) { + memcpy( buffer, startp, len ); + buffer[len] = 0; + } + return result; +} |