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check if *value is non-NULL before setting it

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This commit is contained in:
Pieter Noordhuis 2010-05-21 14:11:09 +02:00
parent 335d16bc0f
commit 33c1269efc
1 changed files with 2 additions and 2 deletions
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4
ziplist.c
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@ -87,13 +87,13 @@ unsigned char *ziplistPush(unsigned char *zl, unsigned char *entry, unsigned int
unsigned char *ziplistPop(unsigned char *zl, sds *value, int where) { unsigned char *ziplistPop(unsigned char *zl, sds *value, int where) {
unsigned int curlen = ZIPLIST_BYTES(zl), len, rlen; unsigned int curlen = ZIPLIST_BYTES(zl), len, rlen;
unsigned char *p; unsigned char *p;
*value = NULL; if (value) *value = NULL;
/* Get pointer to element to remove */ /* Get pointer to element to remove */
p = (where == ZIPLIST_HEAD) ? ziplistHead(zl) : ziplistTail(zl); p = (where == ZIPLIST_HEAD) ? ziplistHead(zl) : ziplistTail(zl);
if (*p == ZIP_END) return zl; if (*p == ZIP_END) return zl;
len = zipDecodeLength(p); len = zipDecodeLength(p);
*value = sdsnewlen(p+zipEncodeLength(NULL,len),len); if (value) *value = sdsnewlen(p+zipEncodeLength(NULL,len),len);
/* Move list to front when popping from the head */ /* Move list to front when popping from the head */
rlen = zipRawEntryLength(p); rlen = zipRawEntryLength(p);