mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 14:30:58 +07:00
2a60689a33
We'll use it to further reduce the size of tools/perf/util/string.c, replacing the strxfrchar() equivalent function we have there. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-x3r61ikjrso1buygxwke8id3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
164 lines
3.2 KiB
C
164 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* linux/tools/lib/string.c
|
|
*
|
|
* Copied from linux/lib/string.c, where it is:
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
*
|
|
* More specifically, the first copied function was strtobool, which
|
|
* was introduced by:
|
|
*
|
|
* d0f1fed29e6e ("Add a strtobool function matching semantics of existing in kernel equivalents")
|
|
* Author: Jonathan Cameron <jic23@cam.ac.uk>
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/compiler.h>
|
|
|
|
/**
|
|
* memdup - duplicate region of memory
|
|
*
|
|
* @src: memory region to duplicate
|
|
* @len: memory region length
|
|
*/
|
|
void *memdup(const void *src, size_t len)
|
|
{
|
|
void *p = malloc(len);
|
|
|
|
if (p)
|
|
memcpy(p, src, len);
|
|
|
|
return p;
|
|
}
|
|
|
|
/**
|
|
* strtobool - convert common user inputs into boolean values
|
|
* @s: input string
|
|
* @res: result
|
|
*
|
|
* This routine returns 0 iff the first character is one of 'Yy1Nn0', or
|
|
* [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL. Value
|
|
* pointed to by res is updated upon finding a match.
|
|
*/
|
|
int strtobool(const char *s, bool *res)
|
|
{
|
|
if (!s)
|
|
return -EINVAL;
|
|
|
|
switch (s[0]) {
|
|
case 'y':
|
|
case 'Y':
|
|
case '1':
|
|
*res = true;
|
|
return 0;
|
|
case 'n':
|
|
case 'N':
|
|
case '0':
|
|
*res = false;
|
|
return 0;
|
|
case 'o':
|
|
case 'O':
|
|
switch (s[1]) {
|
|
case 'n':
|
|
case 'N':
|
|
*res = true;
|
|
return 0;
|
|
case 'f':
|
|
case 'F':
|
|
*res = false;
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* strlcpy - Copy a C-string into a sized buffer
|
|
* @dest: Where to copy the string to
|
|
* @src: Where to copy the string from
|
|
* @size: size of destination buffer
|
|
*
|
|
* Compatible with *BSD: the result is always a valid
|
|
* NUL-terminated string that fits in the buffer (unless,
|
|
* of course, the buffer size is zero). It does not pad
|
|
* out the result like strncpy() does.
|
|
*
|
|
* If libc has strlcpy() then that version will override this
|
|
* implementation:
|
|
*/
|
|
size_t __weak strlcpy(char *dest, const char *src, size_t size)
|
|
{
|
|
size_t ret = strlen(src);
|
|
|
|
if (size) {
|
|
size_t len = (ret >= size) ? size - 1 : ret;
|
|
memcpy(dest, src, len);
|
|
dest[len] = '\0';
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* skip_spaces - Removes leading whitespace from @str.
|
|
* @str: The string to be stripped.
|
|
*
|
|
* Returns a pointer to the first non-whitespace character in @str.
|
|
*/
|
|
char *skip_spaces(const char *str)
|
|
{
|
|
while (isspace(*str))
|
|
++str;
|
|
return (char *)str;
|
|
}
|
|
|
|
/**
|
|
* strim - Removes leading and trailing whitespace from @s.
|
|
* @s: The string to be stripped.
|
|
*
|
|
* Note that the first trailing whitespace is replaced with a %NUL-terminator
|
|
* in the given string @s. Returns a pointer to the first non-whitespace
|
|
* character in @s.
|
|
*/
|
|
char *strim(char *s)
|
|
{
|
|
size_t size;
|
|
char *end;
|
|
|
|
size = strlen(s);
|
|
if (!size)
|
|
return s;
|
|
|
|
end = s + size - 1;
|
|
while (end >= s && isspace(*end))
|
|
end--;
|
|
*(end + 1) = '\0';
|
|
|
|
return skip_spaces(s);
|
|
}
|
|
|
|
/**
|
|
* strreplace - Replace all occurrences of character in string.
|
|
* @s: The string to operate on.
|
|
* @old: The character being replaced.
|
|
* @new: The character @old is replaced with.
|
|
*
|
|
* Returns pointer to the nul byte at the end of @s.
|
|
*/
|
|
char *strreplace(char *s, char old, char new)
|
|
{
|
|
for (; *s; ++s)
|
|
if (*s == old)
|
|
*s = new;
|
|
return s;
|
|
}
|