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string: tidy up strndup()

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It decreases code size:
   text    data     bss     dec     hex filename
    161       0       0     161      a1 strndup-BEFORE.o
    153       0       0     153      99 strndup-AFTER.o

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
This commit is contained in:
André Goddard Rosa 2010-01-30 22:29:59 -02:00
parent 30a419afc3
commit aba3ee7d32
1 changed files with 6 additions and 4 deletions
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10
libc/string/strndup.c
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@ -31,12 +31,14 @@
char* strndup(const char* s, size_t n) char* strndup(const char* s, size_t n)
{ {
size_t slen = (size_t)strlen(s); size_t slen = (size_t)strlen(s);
int len = slen < n ? slen : n; char* copy;
char* copy = malloc(len+1);
if (slen < n)
n = slen;
copy = malloc(n+1);
if (copy) { if (copy) {
memcpy( copy, s, len ); memcpy(copy, s, n);
copy[len] = 0; copy[n] = 0;
} }
return copy; return copy;
} }