Stm Cube IDE ERROR : Comparison error for function - function

Question

I am experimenting with the STM32f407vg board through the STMBUBEIDE program.
First of all, I prepare my own library file and make the settings in the interrupt section.
What if the reason I can't get rid of this error?
First of all, I have a griodriver.c file for my src file. And my definition in it:
uint8_t portcode = GPIO_BASE_ADDR_TO_CODE (pGPIOHandle-> pGPIOx);
Then I write my function so that this comes back.
uint16_t GPIO_BASE_ADDR_TO_CODE(*x)
{
if(x==GPIOA) { return 0; }
else if(x==GPIOB) { return 1; }
else if(x==GPIOC) { return 2; }
else if(x==GPIOD) { return 3; }
else if(x==GPIOE) { return 4; }
else if(x==GPIOF) { return 5; }
else if(x==GPIOG) { return 6; }
}
If I remove the pointer inside the loop, I get a comparison between pointer and interger error.
Whenever I compile I get an error.
My error says this for the function:
This is warnings error.
Description Resource Path Location Type
implicit declaration of function 'GPIO_BASE_ADDR_TO_CODE'; did you mean 'GPIOJ_BASEADDR'?
[- Wimplicit-function-declaration] stm32f407xx_gpio_driver.c /stm32f407xx/drivers/Src
line 253 C/C++ Problem
But there are 2 other errors I get as ERROR.
enter image description here
enter image description here
First:
1. ERROR: Description Resource Path Location Type
make: *** [drivers/Src/subdir.mk:18: drivers/Src/stm32f407xx_gpio_driver.o]
Error 1 stm32f407xx C/C++ Problem
SEcond:
Description Resource Path Location Type
expected declaration specifiers or '...' before '*' token stm32f407xx_gpio_driver.c
/stm32f407xx/drivers/Src line 168 C/C++ Problem
Error Screen:
enter image description here

Answer 1

When I change this part like a below,
uint16_t GPIO_BASE_ADDR_TO_CODE(uint8_t x)
{
if( x==GPIOA) { return 0; }
else if(x==GPIOB) { return 1; }
else if(x==GPIOC) { return 2; }
else if(x==GPIOD) { return 3; }
else if(x==GPIOE) { return 4; }
else if(x==GPIOF) { return 5; }
else if(x==GPIOG) { return 6; }
return 0;
}
My errors change like that :
enter image description here

Answer 2

Instead of calling it in a function, I defined it as #define for
GPIO_BASEADDR_TO_CODE
Also removed if else condition. I used a C third conditional.
Now is no errors after 3 days later:))
You can see it below pictures what I did.
#define GPIO_BASEADDR_TO_CODE(x) ((x == GPIOA)?0 :\
(x == GPIOB)?1 :\
(x == GPIOA)? :\
(x == GPIOA)?3 :\
(x == GPIOA)?4 :\
(x == GPIOA)?5 :\
(x == GPIOA)?6 :\
(x == GPIOA)?7 :0 )
enter image description here