Inori-dev/utils_32cc.h at master · Sillyplus/Inori-dev · GitHub

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/*******************************************************************************
	> File Name: utils_32cc.h
	> Author: sillyplus
	> Mail: oi_boy@sina.cn
	> Created Time: Tue Apr  7 08:23:58 2015
 ******************************************************************************/

#ifndef _UTILS_32CC_H_
#define _UTILS_32CC_H_

#include "stdint.h"

char get_kb_char();
void clear_scn();
void write_str(const char *, uint16_t, uint16_t);
void write_char(char);
void set_char(char, uint16_t);
void read_disk(void *, uint8_t, uint16_t, uint8_t);
void sleep(uint16_t);
void move_cursor(uint16_t);
uint16_t get_cursor();
char get_char();
uint32_t add_int_handler(uint8_t, void *);


static inline void write_str_current(const char *p_str, uint16_t len) {
    while(len--)
        write_char(*p_str++);
}

static inline char * strchr_(char *p_str, char c) {
    while(*p_str != c && *p_str != '\0')
        ++p_str;
    return p_str;
}

static inline void strncpy_(char *dest, const char *source, uint16_t len) {
    __asm__ volatile(
        ".intel_syntax noprefix;"
        "cld;"
        "rep movsb;"
        ".att_syntax prefix;"
        : /* no output */
        : "c"(len), "D"(dest), "S"(source)
        : "memory"
    );
    dest[len] = '\0';
}

static inline char strncmp_(const char *a, const char *b, uint16_t len) {
    __asm__ volatile(
        ".intel_syntax noprefix;"
        "cld;"
        "rep cmpsb;"
        ".att_syntax prefix;"
        : "=c"(len)
        : "c"(len+1), "D"(a), "S"(b)
        : "cc"
    );
    return len;
}

#endif