string.h中和strings.h的区别 [英] Difference between string.h and strings.h

问题描述

我注意到，有（至少在Mac OS X）兼具文件string.h 标题和 strings.h 头。 男子3串显示，它们包含不同的功能。有没有道理呢？

I noticed that there was (at least on Mac OS X) both a string.h header and a strings.h header. man 3 string reveals that they contain different functions. Is there any reason for this?

推荐答案

strings.h来自于Unix的演变BSD分支。其内容已被POSIX规范，但大部分被标记为遗产，并可以与其他功能很容易地更换：

strings.h comes from the BSD branch in the unix evolution. Its content has been standardized by POSIX, but most of it is marked as legacy and can be easily replaced with other functions:

int    bcmp(const void *, const void *, size_t); /* LEGACY, see memcmp */
void   bcopy(const void *, void *, size_t); /* LEGACY, see memcpy, memmove */
void   bzero(void *, size_t); /* LEGACY, see memset */
int    ffs(int);
char  *index(const char *, int); /* LEGACY, see strchr */
char  *rindex(const char *, int); /* LEGACY, see strrchr */
int    strcasecmp(const char *, const char *);
int    strncasecmp(const char *, const char *, size_t);

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