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| author | Jeff King <peff@peff.net> | 2015-01-13 01:57:37 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2015-01-13 18:03:30 (GMT) |
| commit | d64ea0f83bd7e676778f833c57f969a94518a28d (patch) | |
| tree | a823ee7016046bdd3f6d2d9454b6a07260f28182 /git-compat-util.h | |
| parent | 1da1e07c835e900337714cfad6c32a8dc0b36ac3 (diff) | |
| download | git-d64ea0f83bd7e676778f833c57f969a94518a28d.zip git-d64ea0f83bd7e676778f833c57f969a94518a28d.tar.gz git-d64ea0f83bd7e676778f833c57f969a94518a28d.tar.bz2 | |
git-compat-util: add xstrdup_or_null helper
It's a common idiom to duplicate a string if it is non-NULL,
or pass a literal NULL through. This is already a one-liner
in C, but you do have to repeat the name of the string
twice. So if there's a function call, you must write:
const char *x = some_fun(...);
return x ? xstrdup(x) : NULL;
instead of (with this patch) just:
return xstrdup_or_null(some_fun(...));
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index 44890d5..98cb78e 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -629,6 +629,11 @@ extern char *xgetcwd(void); #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x))) +static inline char *xstrdup_or_null(const char *str) +{ + return str ? xstrdup(str) : NULL; +} + static inline size_t xsize_t(off_t len) { if (len > (size_t) len) |