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/*
* (C) 2011 by Harald Welte <laforge@gnumonks.org>
* (C) 2011 by Sylvain Munaut <tnt@246tNt.com>
* (C) 2014 by Nils O. Selåsdal <noselasd@fiane.dyndns.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <stdio.h>
#include <osmocom/core/utils.h>
/*! \addtogroup utils
* @{
*/
/*! \file utils.c */
static char namebuf[255];
/*! \brief get human-readable string for given value
* \param[in] vs Array of value_string tuples
* \param[in] val Value to be converted
* \returns pointer to human-readable string
*/
const char *get_value_string(const struct value_string *vs, uint32_t val)
{
int i;
for (i = 0;; i++) {
if (vs[i].value == 0 && vs[i].str == NULL)
break;
if (vs[i].value == val)
return vs[i].str;
}
snprintf(namebuf, sizeof(namebuf), "unknown 0x%x", val);
namebuf[sizeof(namebuf) - 1] = '\0';
return namebuf;
}
/*! \brief get numeric value for given human-readable string
* \param[in] vs Array of value_string tuples
* \param[in] str human-readable string
* \returns numeric value (>0) or negative numer in case of error
*/
int get_string_value(const struct value_string *vs, const char *str)
{
int i;
for (i = 0;; i++) {
if (vs[i].value == 0 && vs[i].str == NULL)
break;
if (!strcasecmp(vs[i].str, str))
return vs[i].value;
}
return -EINVAL;
}
/*! \brief Convert BCD-encoded digit into printable character
* \param[in] bcd A single BCD-encoded digit
* \returns single printable character
*/
char osmo_bcd2char(uint8_t bcd)
{
if (bcd < 0xa)
return '0' + bcd;
else
return 'A' + (bcd - 0xa);
}
/*! \brief Convert number in ASCII to BCD value
* \param[in] c ASCII character
* \returns BCD encoded value of character
*/
uint8_t osmo_char2bcd(char c)
{
return c - 0x30;
}
/*! \brief Parse a string ocntaining hexadecimal digits
* \param[in] str string containing ASCII encoded hexadecimal digits
* \param[out] b output buffer
* \param[in] max_len maximum space in output buffer
* \returns number of parsed octets, or -1 on error
*/
int osmo_hexparse(const char *str, uint8_t *b, int max_len)
{
int i, l, v;
l = strlen(str);
if ((l&1) || ((l>>1) > max_len))
return -1;
memset(b, 0x00, max_len);
for (i=0; i<l; i++) {
char c = str[i];
if (c >= '0' && c <= '9')
v = c - '0';
else if (c >= 'a' && c <= 'f')
v = 10 + (c - 'a');
else if (c >= 'A' && c <= 'F')
v = 10 + (c - 'A');
else
return -1;
b[i>>1] |= v << (i&1 ? 0 : 4);
}
return i>>1;
}
static char hexd_buff[4096];
static const char hex_chars[] = "0123456789abcdef";
static char *_osmo_hexdump(const unsigned char *buf, int len, char *delim)
{
int i;
char *cur = hexd_buff;
hexd_buff[0] = 0;
for (i = 0; i < len; i++) {
const char *delimp = delim;
int len_remain = sizeof(hexd_buff) - (cur - hexd_buff);
if (len_remain < 3)
break;
*cur++ = hex_chars[buf[i] >> 4];
*cur++ = hex_chars[buf[i] & 0xf];
while (len_remain > 1 && *delimp) {
*cur++ = *delimp++;
len_remain--;
}
*cur = 0;
}
hexd_buff[sizeof(hexd_buff)-1] = 0;
return hexd_buff;
}
/*! \brief Convert a sequence of unpacked bits to ASCII string
* \param[in] bits A sequence of unpacked bits
* \param[in] len Length of bits
*/
char *osmo_ubit_dump(const uint8_t *bits, unsigned int len)
{
int i;
if (len > sizeof(hexd_buff)-1)
len = sizeof(hexd_buff)-1;
memset(hexd_buff, 0, sizeof(hexd_buff));
for (i = 0; i < len; i++) {
char outch;
switch (bits[i]) {
case 0:
outch = '0';
break;
case 0xff:
outch = '?';
break;
case 1:
outch = '1';
break;
default:
outch = 'E';
break;
}
hexd_buff[i] = outch;
}
hexd_buff[sizeof(hexd_buff)-1] = 0;
return hexd_buff;
}
/*! \brief Convert binary sequence to hexadecimal ASCII string
* \param[in] buf pointer to sequence of bytes
* \param[in] len length of buf in number of bytes
* \returns pointer to zero-terminated string
*
* This function will print a sequence of bytes as hexadecimal numbers,
* adding one space character between each byte (e.g. "1a ef d9")
*/
char *osmo_hexdump(const unsigned char *buf, int len)
{
return _osmo_hexdump(buf, len, " ");
}
/*! \brief Convert binary sequence to hexadecimal ASCII string
* \param[in] buf pointer to sequence of bytes
* \param[in] len length of buf in number of bytes
* \returns pointer to zero-terminated string
*
* This function will print a sequence of bytes as hexadecimal numbers,
* without any space character between each byte (e.g. "1aefd9")
*/
char *osmo_hexdump_nospc(const unsigned char *buf, int len)
{
return _osmo_hexdump(buf, len, "");
}
/* Compat with previous typo to preserve abi */
char *osmo_osmo_hexdump_nospc(const unsigned char *buf, int len)
#if defined(__MACH__) && defined(__APPLE__)
;
#else
__attribute__((weak, alias("osmo_hexdump_nospc")));
#endif
#include "../config.h"
#ifdef HAVE_CTYPE_H
#include <ctype.h>
/*! \brief Convert an entire string to lower case
* \param[out] out output string, caller-allocated
* \param[in] in input string
*/
void osmo_str2lower(char *out, const char *in)
{
unsigned int i;
for (i = 0; i < strlen(in); i++)
out[i] = tolower(in[i]);
out[strlen(in)] = '\0';
}
/*! \brief Convert an entire string to upper case
* \param[out] out output string, caller-allocated
* \param[in] in input string
*/
void osmo_str2upper(char *out, const char *in)
{
unsigned int i;
for (i = 0; i < strlen(in); i++)
out[i] = toupper(in[i]);
out[strlen(in)] = '\0';
}
#endif /* HAVE_CTYPE_H */
/*! @} */
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