https://github.com/torvalds/linux
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Tip revision: 8fe28cb58bcb235034b64cbbb7550a8a43fd88be authored by Linus Torvalds on 23 December 2018, 23:55:59 UTC
Linux 4.20
Tip revision: 8fe28cb
ctype.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BOOT_CTYPE_H
#define BOOT_CTYPE_H

static inline int isdigit(int ch)
{
	return (ch >= '0') && (ch <= '9');
}

static inline int isxdigit(int ch)
{
	if (isdigit(ch))
		return true;

	if ((ch >= 'a') && (ch <= 'f'))
		return true;

	return (ch >= 'A') && (ch <= 'F');
}

#endif
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