gistfile1.txt

/*
    By default, a JavaScript method name is produced by concatenating the 
    components of an ObjectiveC method name, replacing ':' with '_', and 
    escaping '_' and '$' with a leading '$', such that '_' becomes "$_" and 
    '$' becomes "$$". For example:

    ObjectiveC name         Default JavaScript name
        moveTo::                moveTo__
        moveTo_                 moveTo$_
        moveTo$_                moveTo$$$_

    This function performs the inverse of that operation.
 
    @result Fills 'buffer' with the ObjectiveC method name that corresponds to 'JSName'. 
            Returns true for success, false for failure. (Failure occurs when 'buffer' 
            is not big enough to hold the result.)
*/
bool convertJSMethodNameToObjc(const char *JSName, char *buffer, size_t bufferSize)
{
    ASSERT(JSName && buffer);
    
    const char *sp = JSName; // source pointer
    char *dp = buffer; // destination pointer
        
    char *end = buffer + bufferSize;
    while (dp < end) {
        if (*sp == '$') {
            ++sp;
            *dp = *sp;
        } else if (*sp == '_')
            *dp = ':';
        else
            *dp = *sp;

        // If a future coder puts funny ++ operators above, we might write off the end 
        // of the buffer in the middle of this loop. Let's make sure to check for that.
        ASSERT(dp < end);
        
        if (*sp == 0) { // We finished converting JSName
            ASSERT(strlen(JSName) < bufferSize);
            return true;
        }
        
        ++sp; 
        ++dp;
    }

    return false; // We ran out of buffer before converting JSName
}