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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 17:42:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 17:42:59 +0000 |
commit | 0c7a6eb5ccace1d8e9f7b301f6a61a7d3f016369 (patch) | |
tree | 80a778fbd7bb3c7858cfac572df1cb08cfa4f988 /dlink.c | |
parent | Initial commit. (diff) | |
download | mdadm-0c7a6eb5ccace1d8e9f7b301f6a61a7d3f016369.tar.xz mdadm-0c7a6eb5ccace1d8e9f7b301f6a61a7d3f016369.zip |
Adding upstream version 4.2.upstream/4.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | dlink.c | 74 |
1 files changed, 74 insertions, 0 deletions
@@ -0,0 +1,74 @@ + +/* doubly linked lists */ +/* This is free software. No strings attached. No copyright claimed */ + +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#ifdef __dietlibc__ +char *strncpy(char *dest, const char *src, size_t n) __THROW; +#endif +void *xcalloc(size_t num, size_t size); +#include "dlink.h" + +void *dl_head() +{ + void *h; + h = dl_alloc(0); + dl_next(h) = h; + dl_prev(h) = h; + return h; +} + +void dl_free(void *v) +{ + struct __dl_head *vv = v; + free(vv-1); +} + +void dl_init(void *v) +{ + dl_next(v) = v; + dl_prev(v) = v; +} + +void dl_insert(void *head, void *val) +{ + dl_next(val) = dl_next(head); + dl_prev(val) = head; + dl_next(dl_prev(val)) = val; + dl_prev(dl_next(val)) = val; +} + +void dl_add(void *head, void *val) +{ + dl_prev(val) = dl_prev(head); + dl_next(val) = head; + dl_next(dl_prev(val)) = val; + dl_prev(dl_next(val)) = val; +} + +void dl_del(void *val) +{ + if (dl_prev(val) == 0 || dl_next(val) == 0) + return; + dl_prev(dl_next(val)) = dl_prev(val); + dl_next(dl_prev(val)) = dl_next(val); + dl_prev(val) = dl_next(val) = 0; +} + +char *dl_strndup(char *s, int l) +{ + char *n; + if (s == NULL) + return NULL; + n = dl_newv(char, l+1); + strncpy(n, s, l+1); + n[l] = 0; + return n; +} + +char *dl_strdup(char *s) +{ + return dl_strndup(s, (int)strlen(s)); +} |