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