Merge pull request 'Add the DbOperationArgs set of functions, and fix bug with LMDB' (#62) from lda/Cytoplasm:db-args into master

Reviewed-on: #62

CHANGELOG.md

@@ -21,6 +21,8 @@ are not even initialized to a default value.
 - Make `HttpRouter` decode path parts before matching them on regular expressions.
 - Fixed a bug in `ArraySort()` that would crash programs if the passed array has no
   elements.
+- Adds `Db[OP]Args` functions that are equivalent to their `Db[OP]` counter parts, but 
+  uses an array of string instead of variadic arguments.
 
 ## v0.4.0
 

include/Cytoplasm/Db.h

@@ -119,6 +119,13 @@ extern void DbMaxCacheSet(Db *, size_t);
  */
 extern DbRef * DbCreate(Db *, size_t,...);
 
+/** 
+ * Behaves like 
+ * .Fn DbCreate ,
+ * but with an array of strings instead of variadic arguments. 
+ */
+extern DbRef * DbCreateArgs(Db *, Array *);
+
 /**
  * Lock an existing object in the database. This function will fail
  * if the object does not exist. It takes a variable number of C
@@ -129,6 +136,13 @@ extern DbRef * DbCreate(Db *, size_t,...);
  */
 extern DbRef * DbLock(Db *, size_t,...);
 
+/** 
+ * Behaves like 
+ * .Fn DbLock ,
+ * but with an array of strings instead of variadic arguments. 
+ */
+extern DbRef * DbLockArgs(Db *, Array *);
+
 /**
  * Behaves like
  * .Fn DbLock ,
@@ -138,6 +152,13 @@ extern DbRef * DbLock(Db *, size_t,...);
  */
 extern DbRef * DbLockIntent(Db *, DbHint, size_t,...);
 
+/** 
+ * Behaves like 
+ * .Fn DbLockIntent ,
+ * but with an array of strings instead of variadic arguments.
+ */
+extern DbRef * DbLockIntentArgs(Db *, DbHint, Array *);
+
 /**
  * Immediately and permanently remove an object from the database.
  * This function assumes the object is not locked, otherwise undefined
@@ -145,6 +166,13 @@ extern DbRef * DbLockIntent(Db *, DbHint, size_t,...);
  */
 extern bool DbDelete(Db *, size_t,...);
 
+/** 
+ * Behaves like 
+ * .Fn DbDelete ,
+ * but with an array of strings instead of variadic arguments. 
+ */
+extern bool DbDeleteArgs(Db *, Array *);
+
 /**
  * Unlock an object and return it back to the database. This function
  * immediately syncs the object to the filesystem. The cache is a
@@ -162,6 +190,13 @@ extern bool DbUnlock(Db *, DbRef *);
  */
 extern bool DbExists(Db *, size_t,...);
 
+/** 
+ * Behaves like 
+ * .Fn DbExists ,
+ * but with an array of strings instead of variadic arguments.
+ */
+extern bool DbExistsArgs(Db *, Array *);
+
 /**
  * List all of the objects at a given path. Unlike the other varargs
  * functions, this one does not take a path to a specific object; it
@@ -174,6 +209,13 @@ extern bool DbExists(Db *, size_t,...);
  */
 extern Array * DbList(Db *, size_t,...);
 
+/** 
+ * Behaves like 
+ * .Fn DbList ,
+ * but with an array of strings instead of variadic arguments.
+ */
+extern Array * DbListArgs(Db *, Array *);
+
 /**
  * Free the list returned by 
  * .Fn DbListFree .

src/Db/Db.c

@@ -262,6 +262,16 @@ DbClose(Db * db)
     Free(db);
 }
 
+DbRef *
+DbCreateArgs(Db * db, Array *args)
+{
+    if (!args || !db || !db->create)
+    {
+        return NULL;
+    }
+
+    return db->create(db, args);
+}
 DbRef *
 DbCreate(Db * db, size_t nArgs,...)
 {
@@ -283,12 +293,22 @@ DbCreate(Db * db, size_t nArgs,...)
         return NULL;
     }
 
-    ret = db->create(db, args);
+    ret = DbCreateArgs(db, args);
     ArrayFree(args);
 
     return ret;
 }
 
+bool
+DbDeleteArgs(Db * db, Array *args)
+{
+    if (!args || !db || !db->delete)
+    {
+        return false;
+    }
+
+    return db->delete(db, args);
+}
 bool
 DbDelete(Db * db, size_t nArgs,...)
 {
@@ -305,12 +325,22 @@ DbDelete(Db * db, size_t nArgs,...)
     args = ArrayFromVarArgs(nArgs, ap);
     va_end(ap);
 
-    ret = db->delete(db, args);
+    ret = DbDeleteArgs(db, args);
 
     ArrayFree(args);
     return ret;
 }
 
+DbRef *
+DbLockArgs(Db * db, Array *args)
+{
+    if (!args || !db || !db->lockFunc)
+    {
+        return NULL;
+    }
+
+    return db->lockFunc(db, DB_HINT_WRITE, args);
+}
 DbRef *
 DbLock(Db * db, size_t nArgs,...)
 {
@@ -318,6 +348,11 @@ DbLock(Db * db, size_t nArgs,...)
     Array *args;
     DbRef *ret;
 
+    if (!db)
+    {
+        return NULL;
+    }
+
     va_start(ap, nArgs);
     args = ArrayFromVarArgs(nArgs, ap);
     va_end(ap);
@@ -327,13 +362,22 @@ DbLock(Db * db, size_t nArgs,...)
         return NULL;
     }
 
-    ret = db->lockFunc(db, DB_HINT_WRITE, args);
+    ret = DbLockArgs(db, args);
 
     ArrayFree(args);
 
     return ret;
 }
 
+DbRef *
+DbLockIntentArgs(Db * db, DbHint hint, Array *args)
+{
+   if (!db || !args || !db->lockFunc)
+   {
+        return NULL;
+   }
+   return db->lockFunc(db, hint, args);
+}
 DbRef *
 DbLockIntent(Db * db, DbHint hint, size_t nArgs,...)
 {
@@ -350,7 +394,7 @@ DbLockIntent(Db * db, DbHint hint, size_t nArgs,...)
         return NULL;
     }
 
-    ret = db->lockFunc(db, hint, args);
+    ret = DbLockIntentArgs(db, hint, args);
 
     ArrayFree(args);
 
@@ -368,6 +412,16 @@ DbUnlock(Db * db, DbRef * ref)
     return db->unlock(db, ref);
 }
 
+bool
+DbExistsArgs(Db * db, Array *args)
+{
+    if (!args || !db || !db->exists)
+    {
+        return false;
+    }
+
+    return db->exists(db, args);
+}
 bool
 DbExists(Db * db, size_t nArgs,...)
 {
@@ -388,12 +442,21 @@ DbExists(Db * db, size_t nArgs,...)
         return false;
     }
 
-    ret = db->exists(db, args);
+    ret = DbExistsArgs(db, args);
     ArrayFree(args);
 
     return ret;
 }
 
+Array * 
+DbListArgs(Db *db, Array *args)
+{
+    if (!db || !args || !db->list)
+    {
+        return NULL;
+    }
+    return db->list(db, args);
+}
 Array *
 DbList(Db * db, size_t nArgs,...)
 {
@@ -410,7 +473,7 @@ DbList(Db * db, size_t nArgs,...)
     path = ArrayFromVarArgs(nArgs, ap);
     va_end(ap);
 
-    result = db->list(db, path);
+    result = DbListArgs(db, path);
     
     ArrayFree(path);
     return result;

src/Db/Flat.c

@@ -54,7 +54,8 @@ DbDirName(FlatDb * db, Array * args, size_t strip)
     {
         char *tmp;
         char *sanitise = StrDuplicate(ArrayGet(args, i));
-        for (j = 0; j < strlen(sanitise); j++)
+        size_t len = strlen(sanitise);
+        for (j = 0; j < len; j++)
         {
             sanitise[j] = DbSanitiseChar(sanitise[j]);
         }

src/Db/LMDB.c

@@ -128,7 +128,9 @@ LMDBKeyHead(MDB_val key)
         return NULL;
     }
 
-    while ((void *) (end - 1) >= key.mv_data && *(end - 1))
+    /* Doing >= will lead to cases where it is sent straight to the 
+     * start. Don't do that. */
+    while ((void *) (end - 1) > key.mv_data && *(end - 1))
     {
         end--;
     }