utils.c

来自「杭州立宇泰ARMsys－P型ARM开发板BIOS代码」· C语言 代码 · 共 371 行

/****************************************************************
 *		ARMSYS7 S3C44B0X developer's notes						*  
 ****************************************************************

 1. 2005.5.17::
 
 ***************************************************************/

#include "..\inc\def.h"
#include "..\inc\board.h"
#include "..\inc\utils.h"

void Memcpy(void *s1, const void *s2, int n)
{
	int i;

	for (i = 0; i < n; i++)
		((char *)(s1))[i] = ((const char *)(s2))[i];
}

void Memset(void *s, const char ch, int n)
{
	int i;

	for (i = 0; i < n; i++)
		((char *)(s))[i] = ch;
}

U16 ntohs(unsigned short s)
{
	return (s >> 8) | (s << 8);
}

U32 ntohl(U32 num)
{
	return  ((num >> 24) & 0x000000ff) |
		((num >>  8) & 0x0000ff00) |
		((num <<  8) & 0x00ff0000) |
		((num << 24) & 0xff000000);
}

U16 htons(U16 s)
{
	return (s >> 8) | (s << 8);
}

U32 htonl(U32 num)
{
	return ntohl(num);
/*	return  ((l >> 24) & 0x000000ff) |
		((l >>  8) & 0x0000ff00) |
		((l <<  8) & 0x00ff0000) |
		((l << 24) & 0xff000000);*/
}

U32 strtoul(char *s)
{
	U32 ret;
	int i;

	ret = 0;

	while (*s != '\0') 
	{
		if (*s >= '0' && *s <= '9')
			i = *s - '0';
		else if (*s >= 'a' && *s <= 'f')
			i = *s - 'a' + 0xa;
		else if (*s >= 'A' && *s <= 'F')
			i = *s - 'A' + 0xa;
		else
			return -1;
		ret = (ret << 4) + i;
		s++;
	}

	return ret;
}

void ultostr(char *s, U32 data)
{
	int i;
	
	s[8] = 0;
	for(i=7; i>=0; i--, data >>=4)
	{
		if((data&0xf)<=9)
			s[i] = (data&0xf)+'0';
		else
			s[i] = (data&0xf)+'a'-0x0a;
	}	
}

U32 strtobcd(char *s)
{
	unsigned long ret;
	int i;

	ret = 0;

	while (*s != '\0') 
	{
		if (*s >= '0' && *s <= '9')
			i = *s - '0';
		else
			return -1;
		ret = (ret << 4) + i;
		s++;
	}

	return ret;
}

U32 strtodec(char *str, int cnt)
{
	U32 i, data = 0;	
	
	for(i=0; i<cnt; i++)
	{
		data *= 10;
		if(str[i]<'0'||str[i]>'9')
			return -1;
		data += str[i]-'0';			
	}	
	return data;
}

int Strlen(const char *s)
{
	int i = 0;

	for(; *s; s++)
		i++;
	
	return i;
}

int Strncmp(const char *s1, const char *s2, int maxlen)
{
	int i;

	for(i = 0; i < maxlen; i++) 
	{
		if(s1[i] != s2[i])
			return ((int) s1[i]) - ((int) s2[i]);
		if(s1[i] == 0)
			return 0;
	}

	return 0;
}

/*---------------------printf and support routines ---------------------*/
/* print c count times */
void PutRepChar(char c, int count)
{
	while (count--) putch(c);
}

/* put string reverse */
void PutStringReverse(char *s, int index)
{
  while ((index--) > 0) putch(s[index]);
}

/*-------------------------------------------------------------------------*/
/* 
   prints value in radix, in a field width width, with fill
   character fill
   if radix is negative, print as signed quantity
   if width is negative, left justify
   if width is 0, use whatever is needed
   if fill is 0, use ' '
 */

static void PutNumber(int value, int radix, int width, char fill)
{
  char buffer[40];
  int bi = 0;
  int unsigned uvalue;
  short int digit;
  short int left = FALSE;
  short int negative = FALSE;

  if (fill == 0) fill = ' ';

  if (width < 0) 
  {
    width = -width;
    left = TRUE;
  }
  if (width < 0 || width > 80) width = 0;
  
  if (radix < 0) 
  {
    radix = -radix;
    if (value < 0) 
    {
      negative = TRUE;
      value = -value;
    }
  }
  uvalue = value;
  do 
  {
    if (radix != 16) 
    {
      digit = uvalue % radix ;
      uvalue = uvalue / radix ;
    }
    else 
    {
      digit = uvalue & 0xf;
      uvalue = uvalue >> 4;
    }
    buffer[bi] = digit + ((digit <= 9) ? '0' : ('A' - 10));
    bi++;

    if (uvalue != 0) 
    {
      	if ((radix==10)&&((bi==3)||(bi==7)||(bi==11)|(bi==15))) 
      	{
			buffer[bi++]=',';
      	}
    }
  } while (uvalue != 0);

  if (negative) 
  {
    buffer[bi] = '-';
    bi += 1;
  }
  if (width <= bi) PutStringReverse(buffer, bi);
  else 
  {
    width -= bi;
    if (!left) PutRepChar(fill, width);
    PutStringReverse(buffer, bi);
    if (left) PutRepChar(fill, width);
  } 
}

/*-------------------------------------------------------------------------*/
static char *FormatItem(char *f, int a)
{
  char c;
  int fieldwidth = 0;
  int leftjust = FALSE;
  int radix = 0;
  char fill = ' ';

  if (*f == '0') fill = '0';
  while ((c = *f++)!=0) 
  {
    if (c >= '0' && c <= '9') 
    {
      fieldwidth = (fieldwidth * 10) + (c - '0');
    }
    else switch (c) {
    case '\000': return(--f);
    case '%': putch('%');
      return(f);
    case '-': leftjust = TRUE;
      break;
    case 'c': 
    {
      if (leftjust) putch(a & 0x7f);
      if (fieldwidth > 0) PutRepChar(fill, fieldwidth - 1);
      if (!leftjust) putch(a & 0x7f);
      return(f);
    }
    case 's': 
    {
      if (leftjust) puts((char *) a);
      if (fieldwidth > Strlen((char *) a))
	PutRepChar(fill, fieldwidth - Strlen((char *)a));
      if (!leftjust) puts((char *) a);
      return(f);
    }
    case 'd': 
    case 'i': radix = -10;break;
    case 'u': radix = 10;break;
    case 'x': radix = 16;break;
    case 'X': radix = 16;break;
    case 'o': radix = 8;break;
    default : radix = 3;break;/* unknown switch! */
    }
    if (radix) break;
  }
  if (leftjust) fieldwidth = -fieldwidth;
  PutNumber(a, radix, fieldwidth, fill);
  return(f);
}

#define vaStart(list, param) list = (char*)((int)&param + sizeof(param))
#define vaArg(list, type) ((type *)(list += sizeof(type)))[-1]
#define vaEnd(list)

void printf(char *f, ...)       /* variable arguments */
{
//	U32 mode ;
	char *argP;
	
	/* disable IRQs and FIQs */
//	mode = uHALir_ReadMode() ;
//	uHALir_WriteMode(mode | NoFIQ | NoIRQ) ;

	vaStart(argP,f);		/* point at the end of the format string */
	while (*f) {			/* this works because args are all ints */
		if (*f == '%')
			f = FormatItem(f + 1, vaArg(argP, int));
		else
			putch(*f++);
	}
	vaEnd(argP);

	/* restore the previous mode */
//	uHALir_WriteMode(mode) ;
}

int getyorn(void)
{
	char c;
	
	puts(" [y/n] ");
	while(1) 
	{		
		c = getch();
		if((c=='y')||(c=='Y')||(c=='n')||(c=='N'))
			break;
	}
	putch(c);
	putch('\n');
	return c&1;	//y&Y are odd, n&N are even
}

int GetParameter(char *str, int cnt)
{
	int i, key;	
	
	i = 0;
	while(1)
	{
		key = getch();
		if(key)
		{
			if(key == ENTER_KEY)
			{
				str[i] = 0;
				return i;
			}
			else if(key == BACK_KEY && i>0)
			{
				i--;
				printf("\b \b");
			}
			else if(key == 0x1b)   //key=='s'键值
			{
				//getch();
				//getch();
				return -1;
			}
			else if(key>=0x20 && key <=0x7e && i<cnt)
			{
				str[i++] = key;
				putch(key);
			}				
		}
	}	
}