286 lines
6.8 KiB
C
286 lines
6.8 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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// 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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// Convert 32-bit value from binary coded decimal
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// to integer format (8 digits).
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//
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int bcd_to_int(int bcd)
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{
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return ((bcd >> 28) & 15) * 10000000 +
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((bcd >> 24) & 15) * 1000000 +
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((bcd >> 20) & 15) * 100000 +
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((bcd >> 16) & 15) * 10000 +
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((bcd >> 12) & 15) * 1000 +
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((bcd >> 8) & 15) * 100 +
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((bcd >> 4) & 15) * 10 +
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(bcd & 15);
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}
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//
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// Convert 32-bit value from integer
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// binary coded decimal format (8 digits).
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//
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int int_to_bcd(int val)
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{
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return ((val / 10000000) % 10) << 28 |
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((val / 1000000) % 10) << 24 |
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((val / 100000) % 10) << 20 |
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((val / 10000) % 10) << 16 |
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((val / 1000) % 10) << 12 |
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((val / 100) % 10) << 8 |
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((val / 10) % 10) << 4 |
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(val % 10);
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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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//
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void utf8_decode(unsigned short *dst, const char *src, unsigned nsym)
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{
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for (; nsym > 0; nsym--) {
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if ((*dst++ = utf8_to_unicode(&src)) == 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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