CODEWITHSUNDEEP
objective-c
SpokaneDude
SpokaneDude

Reputation: 4974

What is the format of a call to this code?

I have this code, (which I did not write):

- (BOOL)execute:(NSString *)sqlCommand error:(NSError **)error
{
    const char *sql = [sqlCommand UTF8String];
    char *errorPointer;
    if (sqlite3_exec(database, sql, NULL, NULL, &errorPointer) != SQLITE_OK)
    {
        if (error)
        {
            NSString *errMsg = [NSString stringWithCString:errorPointer encoding:NSUTF8StringEncoding];
            NSString *description = @"An error occurred executing the SQL statement";
            NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:description, NSLocalizedDescriptionKey, errMsg, NSLocalizedFailureReasonErrorKey, nil];
            *error = [[[NSError alloc] initWithDomain:SQLCipherManagerErrorDomain code:ERR_SQLCIPHER_COMMAND_FAILED userInfo:userInfo] autorelease];
            sqlite3_free(error);
        }
        return NO;
    }
    return YES;
}

I also have a method without the "error" parameter, which I would call using something like this: [dm execute:insertCommand];

My question is: what is the format of the call I would use for the method with the "error" parameter, so I can see any errors back from the call?

Upvotes: 0

Views: 80

Answers (3)

Karl von Moor
Karl von Moor

Reputation: 8614

like that: 

NSError* error = nil;
BOOL success = [dm execute:insertCommand error:&error];

if (success == NO)
{
  // do whatever if failed
}

see also "Handling Error Objects Returned From Methods" from cocoa documentation.

Upvotes: 3

mipadi
mipadi

Reputation: 410662

You'd have to declare an NSError object outside of the call to the code, and pass in the address:

NSError *error;
BOOL success = [whateverObj execute:theSqlStmt error:&error];
if (!success) {
    // Handle error
}

Upvotes: 0

Joe
Joe

Reputation: 57179

NSError *error = nil; //your error
if(![dm execute:sqlCommand error:&error])
{ //Pass the address to your pointer ^^

    //Since you passed the address of your error pointer
    //your execute command was able to set it to an
    //NSError if one occurrs
}

Upvotes: 2

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