diff options
Diffstat (limited to 'third_party/git/compat/qsort_s.c')
-rw-r--r-- | third_party/git/compat/qsort_s.c | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/third_party/git/compat/qsort_s.c b/third_party/git/compat/qsort_s.c deleted file mode 100644 index 52d1f0a73dd8..000000000000 --- a/third_party/git/compat/qsort_s.c +++ /dev/null @@ -1,69 +0,0 @@ -#include "../git-compat-util.h" - -/* - * A merge sort implementation, simplified from the qsort implementation - * by Mike Haertel, which is a part of the GNU C Library. - * Added context pointer, safety checks and return value. - */ - -static void msort_with_tmp(void *b, size_t n, size_t s, - int (*cmp)(const void *, const void *, void *), - char *t, void *ctx) -{ - char *tmp; - char *b1, *b2; - size_t n1, n2; - - if (n <= 1) - return; - - n1 = n / 2; - n2 = n - n1; - b1 = b; - b2 = (char *)b + (n1 * s); - - msort_with_tmp(b1, n1, s, cmp, t, ctx); - msort_with_tmp(b2, n2, s, cmp, t, ctx); - - tmp = t; - - while (n1 > 0 && n2 > 0) { - if (cmp(b1, b2, ctx) <= 0) { - memcpy(tmp, b1, s); - tmp += s; - b1 += s; - --n1; - } else { - memcpy(tmp, b2, s); - tmp += s; - b2 += s; - --n2; - } - } - if (n1 > 0) - memcpy(tmp, b1, n1 * s); - memcpy(b, t, (n - n2) * s); -} - -int git_qsort_s(void *b, size_t n, size_t s, - int (*cmp)(const void *, const void *, void *), void *ctx) -{ - const size_t size = st_mult(n, s); - char buf[1024]; - - if (!n) - return 0; - if (!b || !cmp) - return -1; - - if (size < sizeof(buf)) { - /* The temporary array fits on the small on-stack buffer. */ - msort_with_tmp(b, n, s, cmp, buf, ctx); - } else { - /* It's somewhat large, so malloc it. */ - char *tmp = xmalloc(size); - msort_with_tmp(b, n, s, cmp, tmp, ctx); - free(tmp); - } - return 0; -} |