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authorJohannes Löthberg <johannes@kyriasis.com>2015-01-17 23:45:52 +0100
committerJohannes Löthberg <johannes@kyriasis.com>2015-01-17 23:45:52 +0100
commit1999cc5106e0b98ce3508aa59af98708a281c018 (patch)
tree19239030000f7551efa7c5fbc81147b42ea2831e /src
parentd89b7953c0c3409d8debd3b98430a4d2f5f83fed (diff)
downloadsds-1999cc5106e0b98ce3508aa59af98708a281c018.tar.xz
sds.c Replace all in-place calculations with sdsheader
Diffstat (limited to 'src')
-rw-r--r--src/sds.c28
-rw-r--r--src/sds.h4
2 files changed, 16 insertions, 16 deletions
diff --git a/src/sds.c b/src/sds.c
index 1fdee37..d844b59 100644
--- a/src/sds.c
+++ b/src/sds.c
@@ -82,7 +82,7 @@ sds sdsdup(const sds s) {
/* Free an sds string. No operation is performed if 's' is NULL. */
void sdsfree(sds s) {
if (s == NULL) return;
- free(s-sizeof(struct sdshdr));
+ free(sdsheader(s));
}
/* Set the sds string length to the length as obtained with strlen(), so
@@ -100,7 +100,7 @@ void sdsfree(sds s) {
* the output will be "6" as the string was modified but the logical length
* remains 6 bytes. */
void sdsupdatelen(sds s) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
int reallen = strlen(s);
sh->free += (sh->len-reallen);
sh->len = reallen;
@@ -111,7 +111,7 @@ void sdsupdatelen(sds s) {
* so that next append operations will not require allocations up to the
* number of bytes previously available. */
void sdsclear(sds s) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
sh->free += sh->len;
sh->len = 0;
sh->buf[0] = '\0';
@@ -130,7 +130,7 @@ sds sdsMakeRoomFor(sds s, size_t addlen) {
if (free >= addlen) return s;
len = sdslen(s);
- sh = (void*) (s-(sizeof(struct sdshdr)));
+ sh = sdsheader(s);
newlen = (len+addlen);
if (newlen < SDS_MAX_PREALLOC)
newlen *= 2;
@@ -152,7 +152,7 @@ sds sdsMakeRoomFor(sds s, size_t addlen) {
sds sdsRemoveFreeSpace(sds s) {
struct sdshdr *sh;
- sh = (void*) (s-(sizeof(struct sdshdr)));
+ sh = sdsheader(s);
sh = realloc(sh, sizeof(struct sdshdr)+sh->len+1);
sh->free = 0;
return sh->buf;
@@ -166,7 +166,7 @@ sds sdsRemoveFreeSpace(sds s) {
* 4) The implicit null term.
*/
size_t sdsAllocSize(sds s) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
return sizeof(*sh)+sh->len+sh->free+1;
}
@@ -195,7 +195,7 @@ size_t sdsAllocSize(sds s) {
* sdsIncrLen(s, nread);
*/
void sdsIncrLen(sds s, int incr) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
assert(sh->free >= incr);
sh->len += incr;
@@ -210,7 +210,7 @@ void sdsIncrLen(sds s, int incr) {
* if the specified length is smaller than the current length, no operation
* is performed. */
sds sdsgrowzero(sds s, size_t len) {
- struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
size_t totlen, curlen = sh->len;
if (len <= curlen) return s;
@@ -218,7 +218,7 @@ sds sdsgrowzero(sds s, size_t len) {
if (s == NULL) return NULL;
/* Make sure added region doesn't contain garbage */
- sh = (void*)(s-(sizeof(struct sdshdr)));
+ sh = sdsheader(s);
memset(s+curlen,0,(len-curlen+1)); /* also set trailing \0 byte */
totlen = sh->len+sh->free;
sh->len = len;
@@ -237,7 +237,7 @@ sds sdscatlen(sds s, const void *t, size_t len) {
s = sdsMakeRoomFor(s,len);
if (s == NULL) return NULL;
- sh = (void*) (s-(sizeof(struct sdshdr)));
+ sh = sdsheader(s);
memcpy(s+curlen, t, len);
sh->len = curlen+len;
sh->free = sh->free-len;
@@ -264,13 +264,13 @@ sds sdscatsds(sds s, const sds t) {
/* Destructively modify the sds string 's' to hold the specified binary
* safe string pointed by 't' of length 'len' bytes. */
sds sdscpylen(sds s, const char *t, size_t len) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
size_t totlen = sh->free+sh->len;
if (totlen < len) {
s = sdsMakeRoomFor(s,len-sh->len);
if (s == NULL) return NULL;
- sh = (void*) (s-(sizeof(struct sdshdr)));
+ sh = sdsheader(s);
totlen = sh->free+sh->len;
}
memcpy(s, t, len);
@@ -350,7 +350,7 @@ sds sdscatprintf(sds s, const char *fmt, ...) {
* Output will be just "Hello World".
*/
void sdstrim(sds s, const char *cset) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
char *start, *end, *sp, *ep;
size_t len;
@@ -382,7 +382,7 @@ void sdstrim(sds s, const char *cset) {
* sdsrange(s,1,-1); => "ello World"
*/
void sdsrange(sds s, int start, int end) {
- struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+ struct sdshdr *sh = sdsheader(s);
size_t newlen, len = sdslen(s);
if (len == 0) return;
diff --git a/src/sds.h b/src/sds.h
index ac99b80..4c7ae5f 100644
--- a/src/sds.h
+++ b/src/sds.h
@@ -46,12 +46,12 @@ static inline struct sdshdr * sdsheader(const sds s) {
}
static inline size_t sdslen(const sds s) {
- struct sdshdr *sh = s - (sizeof (struct sdshdr));
+ struct sdshdr *sh = sdsheader(s);
return sh->len;
}
static inline size_t sdsavail(const sds s) {
- struct sdshdr *sh = s - (sizeof (struct sdshdr));
+ struct sdshdr *sh = sdsheader(s);
return sh->free;
}