n_hex.c File Reference

Hexadecimal encode/decode helpers. More...

#include "nilorea/n_hex.h"
#include "nilorea/n_common.h"
#include "nilorea/n_log.h"
#include "nilorea/n_str.h"
#include <ctype.h>
#include <stdint.h>
#include <string.h>

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Functions
unsigned char *	n_hex_decode (const char *hex, size_t *out_len)
	decode a hex string (ASCII whitespace between digits is ignored) into a freshly allocated, NUL-terminated byte buffer; *out_len receives the decoded byte count.
int	n_hex_decode_to (unsigned char *out, size_t out_size, const char *hex, size_t nbytes)
	decode exactly nbytes bytes from the first 2*nbytes hex digits of hex (case-insensitive, no embedded whitespace) into the caller-provided buffer out (needs out_size >= nbytes).
N_STR *	n_hex_encode (const unsigned char *data, size_t len)
	encode len bytes of data as a lowercase hex N_STR (2*len characters); free with free_nstr.
size_t	n_hex_encode_to (char *out, size_t out_size, const unsigned char *data, size_t len)
	encode len bytes of data as lowercase hex into the caller-provided buffer out (needs out_size >= 2*len+1), NUL-terminating on success.
static int	n_hex_value (int c)

Variables
static const char	n_hex_digits [] = "0123456789abcdef"
	lowercase hexadecimal digit table

Detailed Description

Hexadecimal encode/decode helpers.

Author

Castagnier Mickael

Version

1.0

Definition in file n_hex.c.

Function Documentation

n_hex_value()

int n_hex_value ( int c )

static

Definition at line 41 of file n_hex.c.

Referenced by n_hex_decode(), and n_hex_decode_to().

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Variable Documentation

n_hex_digits

const char n_hex_digits[] = "0123456789abcdef"

static

lowercase hexadecimal digit table

Definition at line 38 of file n_hex.c.

Referenced by n_hex_encode(), and n_hex_encode_to().