X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/306c6a02e333583bedd7b9ff15a27008c1008c51..e53ca04b50b86ef158a75c54ae9ee8b17e31719c:/src/ziplist.c

diff --git a/src/ziplist.c b/src/ziplist.c
index 98ad3113..524f7238 100644
--- a/src/ziplist.c
+++ b/src/ziplist.c
@@ -119,6 +119,7 @@ static unsigned int zipEntryEncoding(unsigned char *p) {
         return p[0] & 0xf0;
     }
     assert(NULL);
+    return 0;
 }
 
 /* Return bytes needed to store integer encoded by 'encoding' */
@@ -129,13 +130,14 @@ static unsigned int zipIntSize(unsigned char encoding) {
     case ZIP_INT_64B: return sizeof(int64_t);
     }
     assert(NULL);
+    return 0;
 }
 
 /* Decode the encoded length pointed by 'p'. If a pointer to 'lensize' is
  * provided, it is set to the number of bytes required to encode the length. */
 static unsigned int zipDecodeLength(unsigned char *p, unsigned int *lensize) {
     unsigned char encoding = zipEntryEncoding(p);
-    unsigned int len;
+    unsigned int len = 0;
 
     if (ZIP_IS_STR(encoding)) {
         switch(encoding) {
@@ -300,7 +302,7 @@ static void zipSaveInteger(unsigned char *p, int64_t value, unsigned char encodi
 static int64_t zipLoadInteger(unsigned char *p, unsigned char encoding) {
     int16_t i16;
     int32_t i32;
-    int64_t i64, ret;
+    int64_t i64, ret = 0;
     if (encoding == ZIP_INT_16B) {
         memcpy(&i16,p,sizeof(i16));
         ret = i16;
@@ -595,7 +597,12 @@ unsigned char *ziplistIndex(unsigned char *zl, int index) {
     return (p[0] == ZIP_END || index > 0) ? NULL : p;
 }
 
-/* Return pointer to next entry in ziplist. */
+/* Return pointer to next entry in ziplist.
+ *
+ * zl is the pointer to the ziplist
+ * p is the pointer to the current element
+ *
+ * The element after 'p' is returned, otherwise NULL if we are at the end. */
 unsigned char *ziplistNext(unsigned char *zl, unsigned char *p) {
     ((void) zl);
 
@@ -723,8 +730,8 @@ unsigned int ziplistLen(unsigned char *zl) {
     return len;
 }
 
-/* Return size in bytes of ziplist. */
-unsigned int ziplistSize(unsigned char *zl) {
+/* Return ziplist blob size in bytes. */
+size_t ziplistBlobLen(unsigned char *zl) {
     return ZIPLIST_BYTES(zl);
 }
 
@@ -754,9 +761,9 @@ void ziplistRepr(unsigned char *zl) {
                 "pls: %2u, "
                 "payload %5u"
             "} ",
-            (long unsigned int)p,
+            (long unsigned)p,
             index,
-            p-zl,
+            (unsigned long) (p-zl),
             entry.headersize+entry.len,
             entry.headersize,
             entry.prevrawlen,
@@ -765,10 +772,11 @@ void ziplistRepr(unsigned char *zl) {
         p += entry.headersize;
         if (ZIP_IS_STR(entry.encoding)) {
             if (entry.len > 40) {
-                fwrite(p,40,1,stdout);
+                if (fwrite(p,40,1,stdout) == 0) perror("fwrite");
                 printf("...");
             } else {
-                fwrite(p,entry.len,1,stdout);
+                if (entry.len &&
+                    fwrite(p,entry.len,1,stdout) == 0) perror("fwrite");
             }
         } else {
             printf("%lld", (long long) zipLoadInteger(p,entry.encoding));
@@ -857,7 +865,7 @@ void pop(unsigned char *zl, int where) {
             printf("Pop tail: ");
 
         if (vstr)
-            fwrite(vstr,vlen,1,stdout);
+            if (vlen && fwrite(vstr,vlen,1,stdout) == 0) perror("fwrite");
         else
             printf("%lld", vlong);
 
@@ -932,7 +940,7 @@ int main(int argc, char **argv) {
             return 1;
         }
         if (entry) {
-            fwrite(entry,elen,1,stdout);
+            if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             printf("\n");
         } else {
             printf("%lld\n", value);
@@ -962,7 +970,7 @@ int main(int argc, char **argv) {
             return 1;
         }
         if (entry) {
-            fwrite(entry,elen,1,stdout);
+            if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             printf("\n");
         } else {
             printf("%lld\n", value);
@@ -979,7 +987,7 @@ int main(int argc, char **argv) {
             return 1;
         }
         if (entry) {
-            fwrite(entry,elen,1,stdout);
+            if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             printf("\n");
         } else {
             printf("%lld\n", value);
@@ -1007,7 +1015,7 @@ int main(int argc, char **argv) {
         while (ziplistGet(p, &entry, &elen, &value)) {
             printf("Entry: ");
             if (entry) {
-                fwrite(entry,elen,1,stdout);
+                if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             } else {
                 printf("%lld", value);
             }
@@ -1024,7 +1032,7 @@ int main(int argc, char **argv) {
         while (ziplistGet(p, &entry, &elen, &value)) {
             printf("Entry: ");
             if (entry) {
-                fwrite(entry,elen,1,stdout);
+                if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             } else {
                 printf("%lld", value);
             }
@@ -1041,7 +1049,7 @@ int main(int argc, char **argv) {
         while (ziplistGet(p, &entry, &elen, &value)) {
             printf("Entry: ");
             if (entry) {
-                fwrite(entry,elen,1,stdout);
+                if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             } else {
                 printf("%lld", value);
             }
@@ -1070,7 +1078,7 @@ int main(int argc, char **argv) {
         while (ziplistGet(p, &entry, &elen, &value)) {
             printf("Entry: ");
             if (entry) {
-                fwrite(entry,elen,1,stdout);
+                if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             } else {
                 printf("%lld", value);
             }
@@ -1087,7 +1095,7 @@ int main(int argc, char **argv) {
         while (ziplistGet(p, &entry, &elen, &value)) {
             printf("Entry: ");
             if (entry) {
-                fwrite(entry,elen,1,stdout);
+                if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
             } else {
                 printf("%lld", value);
             }
@@ -1144,7 +1152,8 @@ int main(int argc, char **argv) {
             } else {
                 printf("Entry: ");
                 if (entry) {
-                    fwrite(entry,elen,1,stdout);
+                    if (elen && fwrite(entry,elen,1,stdout) == 0)
+                        perror("fwrite");
                 } else {
                     printf("%lld",value);
                 }