mirror of
https://github.com/adulau/aha.git
synced 2024-12-27 19:26:25 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
|
|
* linux/lib/cmdline.c
|
|
* Helper functions generally used for parsing kernel command line
|
|
* and module options.
|
|
*
|
|
* Code and copyrights come from init/main.c and arch/i386/kernel/setup.c.
|
|
*
|
|
* This source code is licensed under the GNU General Public License,
|
|
* Version 2. See the file COPYING for more details.
|
|
*
|
|
* GNU Indent formatting options for this file: -kr -i8 -npsl -pcs
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
|
|
|
|
/**
|
|
* get_option - Parse integer from an option string
|
|
* @str: option string
|
|
* @pint: (output) integer value parsed from @str
|
|
*
|
|
* Read an int from an option string; if available accept a subsequent
|
|
* comma as well.
|
|
*
|
|
* Return values:
|
|
* 0 : no int in string
|
|
* 1 : int found, no subsequent comma
|
|
* 2 : int found including a subsequent comma
|
|
*/
|
|
|
|
int get_option (char **str, int *pint)
|
|
{
|
|
char *cur = *str;
|
|
|
|
if (!cur || !(*cur))
|
|
return 0;
|
|
*pint = simple_strtol (cur, str, 0);
|
|
if (cur == *str)
|
|
return 0;
|
|
if (**str == ',') {
|
|
(*str)++;
|
|
return 2;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* get_options - Parse a string into a list of integers
|
|
* @str: String to be parsed
|
|
* @nints: size of integer array
|
|
* @ints: integer array
|
|
*
|
|
* This function parses a string containing a comma-separated
|
|
* list of integers. The parse halts when the array is
|
|
* full, or when no more numbers can be retrieved from the
|
|
* string.
|
|
*
|
|
* Return value is the character in the string which caused
|
|
* the parse to end (typically a null terminator, if @str is
|
|
* completely parseable).
|
|
*/
|
|
|
|
char *get_options(const char *str, int nints, int *ints)
|
|
{
|
|
int res, i = 1;
|
|
|
|
while (i < nints) {
|
|
res = get_option ((char **)&str, ints + i);
|
|
if (res == 0)
|
|
break;
|
|
i++;
|
|
if (res == 1)
|
|
break;
|
|
}
|
|
ints[0] = i - 1;
|
|
return (char *)str;
|
|
}
|
|
|
|
/**
|
|
* memparse - parse a string with mem suffixes into a number
|
|
* @ptr: Where parse begins
|
|
* @retptr: (output) Pointer to next char after parse completes
|
|
*
|
|
* Parses a string into a number. The number stored at @ptr is
|
|
* potentially suffixed with %K (for kilobytes, or 1024 bytes),
|
|
* %M (for megabytes, or 1048576 bytes), or %G (for gigabytes, or
|
|
* 1073741824). If the number is suffixed with K, M, or G, then
|
|
* the return value is the number multiplied by one kilobyte, one
|
|
* megabyte, or one gigabyte, respectively.
|
|
*/
|
|
|
|
unsigned long long memparse (char *ptr, char **retptr)
|
|
{
|
|
unsigned long long ret = simple_strtoull (ptr, retptr, 0);
|
|
|
|
switch (**retptr) {
|
|
case 'G':
|
|
case 'g':
|
|
ret <<= 10;
|
|
case 'M':
|
|
case 'm':
|
|
ret <<= 10;
|
|
case 'K':
|
|
case 'k':
|
|
ret <<= 10;
|
|
(*retptr)++;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
EXPORT_SYMBOL(memparse);
|
|
EXPORT_SYMBOL(get_option);
|
|
EXPORT_SYMBOL(get_options);
|