早期freebsd实现
源代码在线查看： strings.h
/* strings.h - define standard string functions */ #ifndef _STRINGS /* once-only... */ #define _STRINGS #ifdef SYS5 #define index strchr #define rindex strrchr #endif SYS5 char *index (); char *mktemp (); char *rindex (); #ifndef SYS5 char *sprintf (); #else SYS5 int sprintf (); #endif SYS5 char *strcat (); int strcmp (); char *strcpy (); int strlen (); char *strncat (); int strncmp (); char *strncpy (); char *getenv (); char *calloc (), *malloc (), *realloc (); #ifdef SYS5 #include #define bcopy(b1,b2,length) (void) memcpy (b2, b1, length) #define bcpy(b1,b2,length) memcmp (b1, b2, length) #define bzero(b,length) (void) memset (b, 0, length) #endif SYS5 #endif not _STRINGS
