[mirror_ubuntu-bionic-kernel.git] / fs / proc / util.c

#include <linux/dcache.h>

unsigned name_to_int(const struct qstr *qstr)
{
	const char *name = qstr->name;
	int len = qstr->len;
	unsigned n = 0;

	if (len > 1 && *name == '0')
		goto out;
	do {
		unsigned c = *name++ - '0';
		if (c > 9)
			goto out;
		if (n >= (~0U-9)/10)
			goto out;
		n *= 10;
		n += c;
	} while (--len > 0);
	return n;
out:
	return ~0U;
}
Commit	Line	Data
3ee2a199 AD	1	#include <linux/dcache.h>
	2
	3	unsigned name_to_int(const struct qstr *qstr)
	4	{
	5	const char *name = qstr->name;
	6	int len = qstr->len;
	7	unsigned n = 0;
	8
	9	if (len > 1 && *name == '0')
	10	goto out;
0746a0bc	11	do {
3ee2a199 AD	12	unsigned c = *name++ - '0';
	13	if (c > 9)
	14	goto out;
	15	if (n >= (~0U-9)/10)
	16	goto out;
	17	n *= 10;
	18	n += c;
0746a0bc	19	} while (--len > 0);
3ee2a199 AD	20	return n;
	21	out:
	22	return ~0U;
	23	}