escape.h
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escape.h
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	#ifndef STRINGS_H
	#define STRINGS_H

	#include <stdbool.h>
	#include <stddef.h>
	#include <stdint.h>

	static inline uint8_t unhex(uint8_t c) {
	return (c & 0xF) + (c >> 6) * 9;
	}

	static inline bool is_xdigit(int c) {
	return (unsigned)c < 256 && (
	(c >= '0' && c <= '9') \|\|
	(c >= 'a' && c <= 'f') \|\|
	(c >= 'A' && c <= 'F')
	);
	}

	static inline bool is_octal_escape(const uint8_t *in, size_t pos) {
	uint8_t c = in[pos + 1];
	return c >= '0' && c <= '7' && !(c == '0' && !(in[pos + 2] >= '0' && in[pos + 2] <= '7'));
	}

	size_t decode_escape(
	const uint8_t *in, size_t pos, size_t end,
	uint8_t out, size_t out_pos, uint8_t quote
	);

	#endif