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Add xmemdupz() that duplicates a block of memory, and NUL terminates it.

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A lot of places in git's code use code like:

  char *res;

  len = ... find length of an interesting segment in src ...;
  res = xmalloc(len + 1);
  memcpy(res, src, len);
  res[len] = '\0';
  return res;

A new function xmemdupz() captures the allocation, copy and NUL
termination.  Existing xstrndup() is reimplemented in terms of
this new function.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pierre Habouzit 2007-09-15 23:53:05 +02:00 committed by Junio C Hamano
parent 0557656930
commit 68d3025a80
1 changed files with 9 additions and 8 deletions
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17
git-compat-util.h
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@ -211,19 +211,20 @@ static inline void *xmalloc(size_t size)
return ret;
}
static inline char *xstrndup(const char *str, size_t len)
static inline void *xmemdupz(const void *data, size_t len)
{
char *p;
p = memchr(str, '\0', len);
if (p)
len = p - str;
p = xmalloc(len + 1);
memcpy(p, str, len);
char *p = xmalloc(len + 1);
memcpy(p, data, len);
p[len] = '\0';
return p;
}
static inline char *xstrndup(const char *str, size_t len)
{
char *p = memchr(str, '\0', len);
return xmemdupz(str, p ? p - str : len);
}
static inline void *xrealloc(void *ptr, size_t size)
{
void *ret = realloc(ptr, size);