diff options
author | Marc Kleine-Budde <mkl@pengutronix.de> | 2015-06-17 22:47:01 +0200 |
---|---|---|
committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-06-18 10:58:58 +0200 |
commit | daeb9d8d76e353eaee45545e8f4e83df92af035c (patch) | |
tree | 165de4c54db0c8eeaf25133a27c1ded2e36bfe9b /lib | |
parent | 48751b1aa94ad2dd40e06a7d6a89fb9e786d9cf7 (diff) | |
download | barebox-daeb9d8d76e353eaee45545e8f4e83df92af035c.tar.gz barebox-daeb9d8d76e353eaee45545e8f4e83df92af035c.tar.xz |
xfuncs: import xstrndup() from busybox
This function is needed for the fixed length string feature in the state
framework.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/xfuncs.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/xfuncs.c b/lib/xfuncs.c index 0e78b670a5..f0219c43a5 100644 --- a/lib/xfuncs.c +++ b/lib/xfuncs.c @@ -63,6 +63,28 @@ char *xstrdup(const char *s) } EXPORT_SYMBOL(xstrdup); +char *xstrndup(const char *s, size_t n) +{ + int m; + char *t; + + /* We can just xmalloc(n+1) and strncpy into it, */ + /* but think about xstrndup("abc", 10000) wastage! */ + m = n; + t = (char*) s; + while (m) { + if (!*t) break; + m--; + t++; + } + n -= m; + t = xmalloc(n + 1); + t[n] = '\0'; + + return memcpy(t, s, n); +} +EXPORT_SYMBOL(xstrndup); + void* xmemalign(size_t alignment, size_t bytes) { void *p = memalign(alignment, bytes); |