/*
 * Backy_lib.h
 * Author: JohnXenox aka Aleksandr Igorevich.
 */

#ifndef __Backy_lib_h__
#define __Backy_lib_h__

// Copied from TCC
char* strrev(char *p)
{
	char *q = p, *res = p, z;
	while(q && *q) ++q; /* find eos */
	for(--q; p < q; ++p, --q)
	{
	z = *p;
	*p = *q;
	*q = z;
	}
	return res;
}
char* itoab(unsigned int n, char* s, int  b)
{
	char *ptr;
	int lowbit;
	ptr = s;
	b >>= 1;
	do {
	lowbit = n & 1;
	n = (n >> 1) & 0x7FFFFFFF;
	*ptr = ((n % b) << 1) + lowbit;
	if(*ptr < 10) *ptr += '0'; else *ptr += 55;
	++ptr;
	} while(n /= b);
	*ptr = 0;
	return strrev(s);
}

/*
typedef  unsigned int        uint32_t;
typedef  unsigned char       uint8_t;
typedef  unsigned short int  uint16_t;
typedef  unsigned long long  uint64_t;
typedef  char                int8_t;
typedef  short int           int16_t;
typedef  int                 int32_t;
typedef  long long           int64_t;
*/
static inline uint32_t getDate(void)
{
    uint32_t date;
    __asm__ __volatile__("int $0x40":"=a"(date):"a"(29));
    return date;
}



static inline uint32_t getTime(void)
{
    uint32_t time;
    __asm__ __volatile__("int $0x40":"=a"(time):"a"(3));
    return time;
}



static inline void *openFile(uint32_t *length, const uint8_t *path)
{
    uint8_t *fd;

    __asm__ __volatile__ ("int $0x40":"=a"(fd), "=d"(*length):"a" (68), "b"(27),"c"(path));

    return fd;
}

struct saveFileStruct
{
    int p1;
    int p2;
    int p3;
    int p4;

    char* p5;
    int p6;
    char* p7;
};

static inline int32_t saveFile(uint32_t nbytes, uint8_t *data, uint32_t enc, uint8_t  *path)
{
    int32_t val;

    struct saveFileStruct dt; // basic information structure.
    
    dt.p1 = 2;       // subfunction number.
    dt.p2= 0;        // reserved.
    dt.p3 = 0;       // reserved.
    dt.p4 = nbytes;  // number of bytes to write.
    dt.p5 = data;    // pointer to data.
    dt.p6 = enc;     // string encoding (0 = default, 1 = cp866, 2 = UTF-16LE, 3 = UTF-8).
    dt.p7 = path;    // pointer to path.

    __asm__ __volatile__("int $0x40":"=a"(val):"a"(80), "b"(&dt):"memory");

    return val;
}

int checkStateOnSave(int state)
{
    #if defined (lang_en)

        switch(state)
        {
            case 2:  con_printf("\nThe function isn't supported for the given file system!\n");
                     return 2;

            case 3:  con_printf("\nUnknown file system!\n");
                     return 3;

            case 5:  con_printf("\nFile isn't found!\n");
                     return 5;

            case 6:  con_printf("\nEnd of a file, EOF!\n");
                     return 6;

            case 7:  con_printf("\nPointer lies outside of application memory!\n");
                     return 7;

            case 8:  con_printf("\nDisk is full!\n");
                     return 8;

            case 9:  con_printf("\nFile system error!\n");
                     return 9;

            case 10: con_printf("\nAccess denied!\n");
                     return 10;

            case 11: con_printf("\nDevice error!\n");
                     return 11;

            case 12: con_printf("\nFile system requires more memory!\n");
                     return 12;
        }

    #elif defined (lang_ru)

        switch(state)
        {
            case 2:  con_printf("\nФункция не поддерживается для данной файловой системы!\n");
                     return 2;

            case 3:  con_printf("\nНеизвестная файловая система!\n");
                     return 3;

            case 5:  con_printf("\nФайл не найден!\n");
                     return 5;

            case 6:  con_printf("\nФайл закончился!\n");
                     return 6;

            case 7:  con_printf("\nУказатель вне памяти приложения!\n");
                     return 7;

            case 8:  con_printf("\nДиск заполнен!\n");
                     return 8;

            case 9:  con_printf("\nОшибка файловой системы!\n");
                     return 9;

            case 10: con_printf("\nДоступ запрещён!\n");
                     return 10;

            case 11: con_printf("\nОшибка устройства!\n");
                     return 11;

            case 12: con_printf("\nФайловой системе недостаточно оперативной памяти!\n");
                     return 12;
        }

    #endif
}







#endif