string.c

c语言编的网络操作系统。具备网络操作系统基本功能。

/*
nexOS: string.c - mini libc string functions
Copyright 2004 nexOS development team

This file is part of nexOS.

nexOS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

nexOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with nexOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#include <string.h>
#include <memory.h>

size_t strlen(const char *s)
{
    size_t l;
    for(l=0; s[l]!=0; l++);
    return l;
}

char *strcpy(char *s1, const char *s2)
{
    extern void kmemcpy(void*,void*,int);
    kmemcpy(s1,(char*)s2,strlen(s2)+1);
    return s1;
}
    
char *strcat(char *s1, const char *s2)
{
    strcpy(s1+strlen(s1),s2);
    return s1;
}
    
char *strchr(const char *s, int c)
{
    for(;*s != 0 && *s != c; s++);
    if( *s )
        return (char*)s;
    else return 0;
}