#ifndef _STRING_H_#define _STRING_H_#ifndef NULL#define NULL ((void *) 0)#endif#ifndef _SIZE_T#define _SIZE_Ttypedef unsigned int size_t;#endifextern char * strerror(int errno);/* * This string-include defines all string functions as inline * functions. Use gcc. It also assumes ds=es=data space, this should be * normal. Most of the string-functions are rather heavily hand-optimized, * see especially strtok,strstr,str[c]spn. They should work, but are not * very easy to understand. Everything is done entirely within the register * set, making the functions fast and clean. String instructions have been * used through-out, making for "slightly" unclear code :-) * *		(C) 1991 Linus Torvalds */ extern inline char * strcpy(char * dest,const char *src){__asm__("cld\n"	"1:\tlodsb\n\t"	"stosb\n\t"	"testb %%al,%%al\n\t"	"jne 1b"	::"S" (src),"D" (dest):"si","di","ax");return dest;}extern inline char * strncpy(char * dest,const char *src,int count){__asm__("cld\n"	"1:\tdecl %2\n\t"	"js 2f\n\t"	"lodsb\n\t"	"stosb\n\t"	"testb %%al,%%al\n\t"	"jne 1b\n\t"	"rep\n\t"	"stosb\n"	"2:"	::"S" (src),"D" (dest),"c" (count):"si","di","ax","cx");return dest;}extern inline char * strcat(char * dest,const char * src){__asm__("cld\n\t"	"repne\n\t"	"scasb\n\t"	"decl %1\n"	"1:\tlodsb\n\t"	"stosb\n\t"	"testb %%al,%%al\n\t"	"jne 1b"	::"S" (src),"D" (dest),"a" (0),"c" (0xffffffff):"si","di","ax","cx");return dest;}extern inline char * strncat(char * dest,const char * src,int count){__asm__("cld\n\t"	"repne\n\t"	"scasb\n\t"	"decl %1\n\t"	"movl %4,%3\n"	"1:\tdecl %3\n\t"	"js 2f\n\t"	"lodsb\n\t"	"stosb\n\t"	"testb %%al,%%al\n\t"	"jne 1b\n"	"2:\txorl %2,%2\n\t"	"stosb"	::"S" (src),"D" (dest),"a" (0),"c" (0xffffffff),"g" (count)	:"si","di","ax","cx");return dest;}extern inline int strcmp(const char * cs,const char * ct){register int __res __asm__("ax");__asm__("cld\n"	"1:\tlodsb\n\t"	"scasb\n\t"	"jne 2f\n\t"	"testb %%al,%%al\n\t"	"jne 1b\n\t"	"xorl %%eax,%%eax\n\t"	"jmp 3f\n"	"2:\tmovl $1,%%eax\n\t"	"jl 3f\n\t"	"negl %%eax\n"	"3:"	:"=a" (__res):"D" (cs),"S" (ct):"si","di");return __res;}extern inline int strncmp(const char * cs,const char * ct,int count){register int __res __asm__("ax");__asm__("cld\n"	"1:\tdecl %3\n\t"	"js 2f\n\t"	"lodsb\n\t"	"scasb\n\t"	"jne 3f\n\t"	"testb %%al,%%al\n\t"	"jne 1b\n"	"2:\txorl %%eax,%%eax\n\t"	"jmp 4f\n"	"3:\tmovl $1,%%eax\n\t"	"jl 4f\n\t"	"negl %%eax\n"	"4:"	:"=a" (__res):"D" (cs),"S" (ct),"c" (count):"si","di","cx");return __res;}extern inline char * strchr(const char * s,char c){register char * __res __asm__("ax");__asm__("cld\n\t"	"movb %%al,%%ah\n"	"1:\tlodsb\n\t"	"cmpb %%ah,%%al\n\t"	"je 2f\n\t"	"testb %%al,%%al\n\t"	"jne 1b\n\t"	"movl $1,%1\n"	"2:\tmovl %1,%0\n\t"	"decl %0"	:"=a" (__res):"S" (s),"0" (c):"si");return __res;}extern inline char * strrchr(const char * s,char c){register char * __res __asm__("dx");__asm__("cld\n\t"	"movb %%al,%%ah\n"	"1:\tlodsb\n\t"	"cmpb %%ah,%%al\n\t"	"jne 2f\n\t"	"movl %%esi,%0\n\t"	"decl %0\n"	"2:\ttestb %%al,%%al\n\t"	"jne 1b"	:"=d" (__res):"0" (0),"S" (s),"a" (c):"ax","si");return __res;}extern inline int strspn(const char * cs, const char * ct){register char * __res __asm__("si");__asm__("cld\n\t"	"movl %4,%%edi\n\t"	"repne\n\t"	"scasb\n\t"	"notl %%ecx\n\t"	"decl %%ecx\n\t"	"movl %%ecx,%%edx\n"	"1:\tlodsb\n\t"	"testb %%al,%%al\n\t"	"je 2f\n\t"	"movl %4,%%edi\n\t"	"movl %%edx,%%ecx\n\t"	"repne\n\t"	"scasb\n\t"	"je 1b\n"	"2:\tdecl %0"	:"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)	:"ax","cx","dx","di");return __res-cs;}extern inline int strcspn(const char * cs, const char * ct){register char * __res __asm__("si");__asm__("cld\n\t"	"movl %4,%%edi\n\t"	"repne\n\t"	"scasb\n\t"	"notl %%ecx\n\t"	"decl %%ecx\n\t"	"movl %%ecx,%%edx\n"	"1:\tlodsb\n\t"	"testb %%al,%%al\n\t"	"je 2f\n\t"	"movl %4,%%edi\n\t"	"movl %%edx,%%ecx\n\t"	"repne\n\t"	"scasb\n\t"	"jne 1b\n"	"2:\tdecl %0"	:"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)	:"ax","cx","dx","di");return __res-cs;}extern inline char * strpbrk(const char * cs,const char * ct){register char * __res __asm__("si");__asm__("cld\n\t"	"movl %4,%%edi\n\t"	"repne\n\t"	"scasb\n\t"	"notl %%ecx\n\t"	"decl %%ecx\n\t"	"movl %%ecx,%%edx\n"	"1:\tlodsb\n\t"	"testb %%al,%%al\n\t"	"je 2f\n\t"	"movl %4,%%edi\n\t"	"movl %%edx,%%ecx\n\t"	"repne\n\t"	"scasb\n\t"	"jne 1b\n\t"	"decl %0\n\t"	"jmp 3f\n"	"2:\txorl %0,%0\n"	"3:"	:"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)	:"ax","cx","dx","di");return __res;}extern inline char * strstr(const char * cs,const char * ct){register char * __res __asm__("ax");__asm__("cld\n\t" \	"movl %4,%%edi\n\t"	"repne\n\t"	"scasb\n\t"	"notl %%ecx\n\t"	"decl %%ecx\n\t"	/* NOTE! This also sets Z if searchstring='' */	"movl %%ecx,%%edx\n"	"1:\tmovl %4,%%edi\n\t"	"movl %%esi,%%eax\n\t"	"movl %%edx,%%ecx\n\t"	"repe\n\t"	"cmpsb\n\t"	"je 2f\n\t"		/* also works for empty string, see above */	"xchgl %%eax,%%esi\n\t"	"incl %%esi\n\t"	"cmpb $0,-1(%%eax)\n\t"	"jne 1b\n\t"	"xorl %%eax,%%eax\n\t"	"2:"	:"=a" (__res):"0" (0),"c" (0xffffffff),"S" (cs),"g" (ct)	:"cx","dx","di","si");return __res;}extern inline int strlen(const char * s){register int __res __asm__("cx");__asm__("cld\n\t"	"repne\n\t"	"scasb\n\t"	"notl %0\n\t"	"decl %0"	:"=c" (__res):"D" (s),"a" (0),"0" (0xffffffff):"di");return __res;}extern char * ___strtok;extern inline char * strtok(char * s,const char * ct){register char * __res __asm__("si");__asm__("testl %1,%1\n\t"	"jne 1f\n\t"	"testl %0,%0\n\t"	"je 8f\n\t"	"movl %0,%1\n"	"1:\txorl %0,%0\n\t"	"movl $-1,%%ecx\n\t"	"xorl %%eax,%%eax\n\t"	"cld\n\t"	"movl %4,%%edi\n\t"	"repne\n\t"	"scasb\n\t"	"notl %%ecx\n\t"	"decl %%ecx\n\t"	"je 7f\n\t"			/* empty delimeter-string */	"movl %%ecx,%%edx\n"	"2:\tlodsb\n\t"	"testb %%al,%%al\n\t"	"je 7f\n\t"	"movl %4,%%edi\n\t"	"movl %%edx,%%ecx\n\t"	"repne\n\t"	"scasb\n\t"	"je 2b\n\t"	"decl %1\n\t"	"cmpb $0,(%1)\n\t"	"je 7f\n\t"	"movl %1,%0\n"	"3:\tlodsb\n\t"	"testb %%al,%%al\n\t"	"je 5f\n\t"	"movl %4,%%edi\n\t"	"movl %%edx,%%ecx\n\t"	"repne\n\t"	"scasb\n\t"	"jne 3b\n\t"	"decl %1\n\t"	"cmpb $0,(%1)\n\t"	"je 5f\n\t"	"movb $0,(%1)\n\t"	"incl %1\n\t"	"jmp 6f\n"	"5:\txorl %1,%1\n"	"6:\tcmpb $0,(%0)\n\t"	"jne 7f\n\t"	"xorl %0,%0\n"	"7:\ttestl %0,%0\n\t"	"jne 8f\n\t"	"movl %0,%1\n"	"8:"	:"=b" (__res),"=S" (___strtok)	:"0" (___strtok),"1" (s),"g" (ct)	:"ax","cx","dx","di");return __res;}extern inline void * memcpy(void * dest,const void * src, int n){__asm__("cld\n\t"	"rep\n\t"	"movsb"	::"c" (n),"S" (src),"D" (dest)	:"cx","si","di");return dest;}extern inline void * memmove(void * dest,const void * src, int n){if (dest<src)__asm__("cld\n\t"	"rep\n\t"	"movsb"	::"c" (n),"S" (src),"D" (dest)	:"cx","si","di");else__asm__("std\n\t"	"rep\n\t"	"movsb"	::"c" (n),"S" (src+n-1),"D" (dest+n-1)	:"cx","si","di");return dest;}extern inline int memcmp(const void * cs,const void * ct,int count){register int __res __asm__("ax");__asm__("cld\n\t"	"repe\n\t"	"cmpsb\n\t"	"je 1f\n\t"	"movl $1,%%eax\n\t"	"jl 1f\n\t"	"negl %%eax\n"	"1:"	:"=a" (__res):"0" (0),"D" (cs),"S" (ct),"c" (count)	:"si","di","cx");return __res;}extern inline void * memchr(const void * cs,char c,int count){register void * __res __asm__("di");if (!count)	return NULL;__asm__("cld\n\t"	"repne\n\t"	"scasb\n\t"	"je 1f\n\t"	"movl $1,%0\n"	"1:\tdecl %0"	:"=D" (__res):"a" (c),"D" (cs),"c" (count)	:"cx");return __res;}extern inline void * memset(void * s,char c,int count){__asm__("cld\n\t"	"rep\n\t"	"stosb"	::"a" (c),"D" (s),"c" (count)	:"cx","di");return s;}#endif