string.h

FritzOS - 简单的C++开发OS的实例// 英文

/* string.h : FritzOS String Header File For The FritzOS C Kernel
   Copyright (C) 2002 Tom Fritz

 * This program is a part of the FritzOS kernel, and may be freely
 * copied under the terms of the GNU General Public License (GPL),
 * version 2, or at your option any later version.

   For more info, look at the COPYING file.
*/

// defines:

#ifndef STRING_H
#define STRING_H

// Strcat:
#define strcat( x, y ) memcat( ( void * ) ( x + strlen( x ) + 1 ), ( void * )( y ), ( strlen( y ) + 1 ) )

// Strcpy - copy strings
#define strcpy( x, y ) memcpy( ( void * ) ( x ), ( void * )( y ), ( strlen( x ) + 1 ) )

// voids:
// Memcopy defined in kernelasm.asm
extern void* memcpy( void* to, const void* from, size_t count );

// Memset defined in kernelasm.asm
extern void* memset( void* buf, int ch, size_t cont );

// Memsetw
void* memsetw( void *dest, int value, size_t count );

// strlen: to see how long a string is
// example: int tst; tst = strlen( "12345678" ); // tst = how long char is
size_t strlen( char* charlen );


//*************************************************************************************************************
//


// strlen: to see how long a string is
// example: int tst; tst = strlen( "12345678" ); // tst = how long char is
size_t strlen( char* charlen )
{
	size_t valret;

	for ( valret = 0; *charlen != '\0'; charlen++ )
		valret++;

	return valret;
}

//*************************************************************************************************************
//

void* memsetw( void *dest, int value, size_t count )
{
	unsigned short *_temp = ( unsigned short * ) dest;

	for ( ; count != 0; count-- )
		*_temp++ = value;

	return dest;
}

#endif

// End of string.h