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v0.5.1
https://github.com/torvalds/linux
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Tip revision: a25f0944ba9b1d8a6813fd6f1a86f1bd59ac25a6 authored by Linus Torvalds on 13 November 2016, 18:32:32 UTC
Linux 4.9-rc5
Tip revision: a25f094
ctype.h
#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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