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https://github.com/torvalds/linux
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7d85c43421
Copying it to tools/lib/string.c, the counterpart to the kernel's lib/string.c. This is preparation for enhancing BPF program configuration, which will allow config string like 'inlines=yes'. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Jonathan Cameron <jic23@cam.ac.uk> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1447675815-166222-6-git-send-email-wangnan0@huawei.com [ Copied it to tools/lib/string.c instead, to make it usable by other tools/ ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
/*
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* linux/tools/lib/string.c
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*
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* Copied from linux/lib/string.c, where it is:
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* More specifically, the first copied function was strtobool, which
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* was introduced by:
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*
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* d0f1fed29e6e ("Add a strtobool function matching semantics of existing in kernel equivalents")
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* Author: Jonathan Cameron <jic23@cam.ac.uk>
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <linux/string.h>
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/**
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* memdup - duplicate region of memory
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*
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* @src: memory region to duplicate
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* @len: memory region length
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*/
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void *memdup(const void *src, size_t len)
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{
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void *p = malloc(len);
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if (p)
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memcpy(p, src, len);
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return p;
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}
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/**
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* strtobool - convert common user inputs into boolean values
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* @s: input string
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* @res: result
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*
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* This routine returns 0 iff the first character is one of 'Yy1Nn0'.
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* Otherwise it will return -EINVAL. Value pointed to by res is
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* updated upon finding a match.
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*/
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int strtobool(const char *s, bool *res)
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{
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switch (s[0]) {
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case 'y':
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case 'Y':
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case '1':
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*res = true;
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break;
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case 'n':
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case 'N':
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case '0':
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*res = false;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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