osdev/lib_c.h at master · ApplePy/osdev · GitHub

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#ifndef LIB_C_H_
#define LIB_C_H_

#define NULL 0

unsigned long irq_count[ 256 ];

typedef struct {

   unsigned short gs __attribute__((aligned(4)));
   unsigned short fs __attribute__((aligned(4)));
   unsigned short es __attribute__((aligned(4)));
   unsigned short ds __attribute__((aligned(4)));

   unsigned long  edi;
   unsigned long  esi;
   unsigned long  ebp;
   unsigned long  esp;
   unsigned long  ebx;
   unsigned long  edx;
   unsigned long  ecx;
   unsigned long  eax;

   unsigned char  error_code __attribute__((aligned(4)));

   unsigned long  eip;
   unsigned short cs;
   unsigned long  eflags;

   // May or may not be filled depending on privilege level of caller
   unsigned long  user_esp;
   unsigned short user_ss __attribute__((aligned(4)));

} ISR_Stack_Frame;

char getcc( int echo );
int  gethex( unsigned long *num, int digits, int echo );
void idt_install();
void idt_set_gate( unsigned char num, void ( *handler )( unsigned char num, ISR_Stack_Frame isf ), unsigned short selector, unsigned char type );
char lowercase( char c );
char uppercase( char c );
char* lowercase_str(char* input);
char* uppercase_str(char* input);
void putcc( char c );
void printhex( unsigned long num, int digits );
void printss( char *s );
void printsss( char *s, int n );
void putstring(char * str);
void _printInt(int val, int base);
void _printf(char * fmt, ...);


#endif