534 lines
12 KiB
C
534 lines
12 KiB
C
/*
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* Auxiliary functions.
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*
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* Copyright (C) 2018 Serge Vakulenko, KK6ABQ
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#ifdef MINGW32
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# include <windows.h>
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#else
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# include <sys/stat.h>
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#endif
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#include "util.h"
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//
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// CTCSS tones, Hz*10.
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//
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#define NCTCSS 50
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static const int CTCSS_TONES [NCTCSS] = {
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670, 693, 719, 744, 770, 797, 825, 854, 885, 915,
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948, 974, 1000, 1035, 1072, 1109, 1148, 1188, 1230, 1273,
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1318, 1365, 1413, 1462, 1514, 1567, 1598, 1622, 1655, 1679,
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1713, 1738, 1773, 1799, 1835, 1862, 1899, 1928, 1966, 1995,
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2035, 2065, 2107, 2181, 2257, 2291, 2336, 2418, 2503, 2541,
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};
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//
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// DCS codes.
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//
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#define NDCS 104
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static const int DCS_CODES[NDCS] = {
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23, 25, 26, 31, 32, 36, 43, 47, 51, 53,
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54, 65, 71, 72, 73, 74, 114, 115, 116, 122,
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125, 131, 132, 134, 143, 145, 152, 155, 156, 162,
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165, 172, 174, 205, 212, 223, 225, 226, 243, 244,
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245, 246, 251, 252, 255, 261, 263, 265, 266, 271,
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274, 306, 311, 315, 325, 331, 332, 343, 346, 351,
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356, 364, 365, 371, 411, 412, 413, 423, 431, 432,
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445, 446, 452, 454, 455, 462, 464, 465, 466, 503,
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506, 516, 523, 526, 532, 546, 565, 606, 612, 624,
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627, 631, 632, 654, 662, 664, 703, 712, 723, 731,
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732, 734, 743, 754,
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};
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//
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// Check for a regular file.
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//
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int is_file(char *filename)
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{
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#ifdef MINGW32
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// Treat COM* as a device.
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return strncasecmp(filename, "com", 3) != 0;
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#else
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struct stat st;
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if (stat(filename, &st) < 0) {
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// File not exist: treat it as a regular file.
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return 1;
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}
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return (st.st_mode & S_IFMT) == S_IFREG;
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#endif
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}
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//
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// Print data in hex format.
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//
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void print_hex(const unsigned char *data, int len)
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{
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int i;
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printf("%02x", (unsigned char) data[0]);
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for (i=1; i<len; i++)
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printf("-%02x", (unsigned char) data[i]);
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}
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//
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// Delay in milliseconds.
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//
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void mdelay(unsigned msec)
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{
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#ifdef MINGW32
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Sleep(msec);
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#else
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usleep(msec * 1000);
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#endif
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}
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//
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// Round double value to integer.
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//
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static int iround(double x)
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{
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if (x >= 0)
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return (int)(x + 0.5);
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return -(int)(-x + 0.5);
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}
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//
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// Get a binary value of the parameter: On/Off,
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// Ignore case.
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// For invlid value, print a message and halt.
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//
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int on_off(char *param, char *value)
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{
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if (strcasecmp("On", value) == 0)
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return 1;
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if (strcasecmp("Off", value) == 0)
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return 0;
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fprintf(stderr, "Bad value for %s: %s\n", param, value);
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exit(-1);
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}
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//
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// Get integer value, or "Off" as 0,
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// Ignore case.
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//
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int atoi_off(const char *value)
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{
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if (strcasecmp("Off", value) == 0)
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return 0;
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return atoi(value);
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}
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//
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// Copy a text string to memory image.
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// Clear unused part with spaces.
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//
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void copy_str(unsigned char *dest, const char *src, int nbytes)
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{
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int i;
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for (i=0; i<nbytes; i++) {
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*dest++ = (*src ? *src++ : ' ');
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}
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}
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//
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// Find a string in a table of size nelem, ignoring case.
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// Return -1 when not found.
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//
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int string_in_table(const char *value, const char *tab[], int nelem)
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{
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int i;
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for (i=0; i<nelem; i++) {
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if (strcasecmp(tab[i], value) == 0) {
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return i;
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}
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}
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return -1;
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}
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//
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// Print description of the parameter.
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//
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void print_options(FILE *out, const char **tab, int num, const char *info)
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{
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int i;
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fprintf(out, "\n");
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if (info)
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fprintf(out, "# %s\n", info);
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fprintf(out, "# Options:");
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for (i=0; i<num; i++) {
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if (i > 0)
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fprintf(out, ",");
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fprintf(out, " %s", tab[i]);
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}
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fprintf(out, "\n");
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}
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//
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// Write Unicode symbol to file.
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// Convert to UTF-8 encoding:
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// 00000000.0xxxxxxx -> 0xxxxxxx
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// 00000xxx.xxyyyyyy -> 110xxxxx, 10yyyyyy
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// xxxxyyyy.yyzzzzzz -> 1110xxxx, 10yyyyyy, 10zzzzzz
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//
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void putc_utf8(unsigned short ch, FILE *out)
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{
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if (ch < 0x80) {
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putc (ch, out);
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} else if (ch < 0x800) {
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putc (ch >> 6 | 0xc0, out);
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putc ((ch & 0x3f) | 0x80, out);
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} else {
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putc (ch >> 12 | 0xe0, out);
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putc (((ch >> 6) & 0x3f) | 0x80, out);
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putc ((ch & 0x3f) | 0x80, out);
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}
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}
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//
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// Print utf16 text as utf8.
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// For short texts, replace space with underscore.
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//
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void print_unicode(FILE *out, const unsigned short *text, unsigned nchars, int fill_flag)
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{
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unsigned i, ch;
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for (i=0; i<nchars && *text; i++) {
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ch = *text++;
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if (ch == '\t')
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ch = ' ';
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if (nchars <= 16 && ch == ' ')
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ch = '_';
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putc_utf8(ch, out);
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}
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if (fill_flag) {
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for (; i<nchars; i++) {
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putc(' ', out);
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}
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}
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}
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//
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// Get local time in format: YYYYMMDDhhmmss
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//
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void get_timestamp(char p[16])
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{
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time_t now = time(NULL);
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struct tm *local = localtime(&now);
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if (! local) {
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perror("localtime");
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exit(-1);
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}
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if (!strftime(p, 16, "%Y%m%d%H%M%S", local)) {
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perror("strftime");
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exit(-1);
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}
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}
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//
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// Fetch Unicode symbol from UTF-8 string.
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// Advance string pointer.
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//
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int utf8_to_unicode(const char **p)
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{
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int c1, c2, c3;
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c1 = (unsigned char) *(*p)++;
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if (! (c1 & 0x80))
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return c1;
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c2 = (unsigned char) *(*p)++;
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if (! (c1 & 0x20))
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return (c1 & 0x1f) << 6 | (c2 & 0x3f);
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c3 = (unsigned char) *(*p)++;
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return (c1 & 0x0f) << 12 | (c2 & 0x3f) << 6 | (c3 & 0x3f);
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}
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//
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// Decode UTF-8 string into UCS-2 string, at most nsym characters.
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// Replace underscore by space.
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//
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void utf8_decode(unsigned short *dst, const char *src, unsigned nsym)
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{
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if (src[0] == '-' && src[1] == 0)
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src = "";
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for (; nsym > 0; nsym--) {
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int ch = utf8_to_unicode(&src);
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if (ch == '_')
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ch = ' ';
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*dst++ = ch;
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if (ch == 0) {
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// Clear the remaining bytes.
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while (--nsym > 0)
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*dst++ = 0;
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break;
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}
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}
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}
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//
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// Convert tone string to BCD format.
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// Four possible formats:
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// nnn.n - CTCSS frequency
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// DnnnN - DCS normal
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// DnnnI - DCS inverted
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// '-' - Disabled
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//
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int encode_tone(char *str)
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{
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unsigned val, tag, a, b, c, d;
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if (*str == '-') {
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// Disabled
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return 0xffff;
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} else if (*str == 'D' || *str == 'd') {
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//
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// DCS tone
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//
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char *e;
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val = strtoul(++str, &e, 10);
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// Find a valid index in DCS table.
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int i;
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for (i=0; i<NDCS; i++)
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if (DCS_CODES[i] == val)
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break;
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if (i >= NDCS)
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return -1;
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a = 0;
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b = val / 100;
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c = val / 10 % 10;
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d = val % 10;
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if (*e == 'N' || *e == 'n') {
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tag = 2;
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} else if (*e == 'I' || *e == 'i') {
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tag = 3;
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} else {
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return -1;
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}
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} else if (*str >= '0' && *str <= '9') {
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//
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// CTCSS tone
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//
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float hz;
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if (sscanf(str, "%f", &hz) != 1)
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return -1;
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// Round to integer.
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val = hz * 10.0 + 0.5;
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// Find a valid index in CTCSS table.
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int i;
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for (i=0; i<NCTCSS; i++)
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if (CTCSS_TONES[i] == val)
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break;
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if (i >= NCTCSS)
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return -1;
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a = val / 1000;
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b = val / 100 % 10;
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c = val / 10 % 10;
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d = val % 10;
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tag = 0;
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} else {
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return -1;
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}
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return (a << 12) | (b << 8) | (c << 4) | d | (tag << 14);
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}
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//
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// Print frequency (BCD value).
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//
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void print_freq(FILE *out, unsigned data)
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{
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fprintf(out, "%d%d%d.%d%d%d", (data >> 28) & 15, (data >> 24) & 15,
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(data >> 20) & 15, (data >> 16) & 15,
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(data >> 12) & 15, (data >> 8) & 15);
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if ((data & 0xff) == 0) {
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fputs(" ", out);
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} else {
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fprintf(out, "%d", (data >> 4) & 15);
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if ((data & 0x0f) == 0) {
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fputs(" ", out);
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} else {
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fprintf(out, "%d", data & 15);
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}
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}
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}
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//
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// Convert frequency in MHz from floating point to
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// a binary coded decimal format (8 digits).
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//
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unsigned mhz_to_bcd(double mhz)
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{
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unsigned hz = iround(mhz * 1000000.0);
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return ((hz / 100000000) % 10) << 28 |
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((hz / 10000000) % 10) << 24 |
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((hz / 1000000) % 10) << 20 |
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((hz / 100000) % 10) << 16 |
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((hz / 10000) % 10) << 12 |
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((hz / 1000) % 10) << 8 |
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((hz / 100) % 10) << 4 |
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((hz / 10) % 10);
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}
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//
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// Convert a 4-byte frequency value from binary coded decimal
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// to integer format (in Hertz).
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//
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int freq_to_hz(unsigned bcd)
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{
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int a = (bcd >> 28) & 15;
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int b = (bcd >> 24) & 15;
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int c = (bcd >> 20) & 15;
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int d = (bcd >> 16) & 15;
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int e = (bcd >> 12) & 15;
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int f = (bcd >> 8) & 15;
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int g = (bcd >> 4) & 15;
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int h = bcd & 15;
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return (((((((a*10 + b) * 10 + c) * 10 + d) * 10 + e) * 10 + f) * 10 + g) * 10 + h) * 10;
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}
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//
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// Print frequency as MHz.
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//
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void print_mhz(FILE *out, unsigned hz)
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{
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if (hz % 1000000 == 0)
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fprintf(out, "%-8u", hz / 1000000);
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else if (hz % 100000 == 0)
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fprintf(out, "%-8.1f", hz / 1000000.0);
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else if (hz % 10000 == 0)
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fprintf(out, "%-8.2f", hz / 1000000.0);
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else if (hz % 1000 == 0)
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fprintf(out, "%-8.3f", hz / 1000000.0);
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else if (hz % 100 == 0)
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fprintf(out, "%-8.4f", hz / 1000000.0);
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else
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fprintf(out, "%-8.5f", hz / 1000000.0);
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}
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//
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// Print the transmit offset or frequency.
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//
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void print_offset(FILE *out, unsigned rx_bcd, unsigned tx_bcd)
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{
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int rx_hz = freq_to_hz(rx_bcd);
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int tx_hz = freq_to_hz(tx_bcd);
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int delta = tx_hz - rx_hz;
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if (delta == 0) {
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fprintf(out, "+0 ");
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} else if (delta > 0 && delta/50000 <= 255) {
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fprintf(out, "+");
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print_mhz(out, delta);
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} else if (delta < 0 && -delta/50000 <= 255) {
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fprintf(out, "-");
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print_mhz(out, -delta);
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} else {
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fprintf(out, " ");
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print_mhz(out, tx_hz);
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}
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}
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//
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// Compare channel index for qsort().
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//
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int compare_index(const void *pa, const void *pb)
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{
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unsigned short a = *(unsigned short*) pa;
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unsigned short b = *(unsigned short*) pb;
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if (a == 0)
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return (b != 0);
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if (b == 0)
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return -1;
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if (a < b)
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return -1;
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if (a > b)
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return 1;
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return 0;
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}
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//
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// Print CTSS or DCS tone.
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//
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void print_tone(FILE *out, unsigned data)
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{
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if (data == 0xffff) {
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fprintf(out, "- ");
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return;
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}
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unsigned tag = data >> 14;
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unsigned a = (data >> 12) & 3;
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unsigned b = (data >> 8) & 15;
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unsigned c = (data >> 4) & 15;
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unsigned d = data & 15;
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switch (tag) {
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default:
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// CTCSS
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if (a == 0)
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fprintf(out, "%d%d.%d ", b, c, d);
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else
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fprintf(out, "%d%d%d.%d", a, b, c, d);
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break;
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case 2:
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// DCS-N
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fprintf(out, "D%d%d%dN", b, c, d);
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break;
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case 3:
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// DCS-I
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fprintf(out, "D%d%d%dI", b, c, d);
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break;
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}
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}
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