dmrconfig/util.c
2018-08-27 16:42:50 -07:00

211 lines
5.2 KiB
C

/*
* Auxiliary functions.
*
* Copyright (C) 2018 Serge Vakulenko, KK6ABQ
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#ifdef MINGW32
# include <windows.h>
#else
# include <sys/stat.h>
#endif
#include "util.h"
//
// Check for a regular file.
//
int is_file(char *filename)
{
#ifdef MINGW32
// Treat COM* as a device.
return strncasecmp(filename, "com", 3) != 0;
#else
struct stat st;
if (stat(filename, &st) < 0) {
// File not exist: treat it as a regular file.
return 1;
}
return (st.st_mode & S_IFMT) == S_IFREG;
#endif
}
//
// Print data in hex format.
//
void print_hex(const unsigned char *data, int len)
{
int i;
printf("%02x", (unsigned char) data[0]);
for (i=1; i<len; i++)
printf("-%02x", (unsigned char) data[i]);
}
//
// Delay in milliseconds.
//
void mdelay(unsigned msec)
{
#ifdef MINGW32
Sleep(msec);
#else
usleep(msec * 1000);
#endif
}
//
// Convert 32-bit value from binary coded decimal
// to integer format (8 digits).
//
int bcd_to_int(int bcd)
{
return ((bcd >> 28) & 15) * 10000000 +
((bcd >> 24) & 15) * 1000000 +
((bcd >> 20) & 15) * 100000 +
((bcd >> 16) & 15) * 10000 +
((bcd >> 12) & 15) * 1000 +
((bcd >> 8) & 15) * 100 +
((bcd >> 4) & 15) * 10 +
(bcd & 15);
}
//
// Convert 32-bit value from integer
// binary coded decimal format (8 digits).
//
int int_to_bcd(int val)
{
return ((val / 10000000) % 10) << 28 |
((val / 1000000) % 10) << 24 |
((val / 100000) % 10) << 20 |
((val / 10000) % 10) << 16 |
((val / 1000) % 10) << 12 |
((val / 100) % 10) << 8 |
((val / 10) % 10) << 4 |
(val % 10);
}
//
// Get a binary value of the parameter: On/Off,
// Ignore case.
// For invlid value, print a message and halt.
//
int on_off(char *param, char *value)
{
if (strcasecmp("On", value) == 0)
return 1;
if (strcasecmp("Off", value) == 0)
return 0;
fprintf(stderr, "Bad value for %s: %s\n", param, value);
exit(-1);
}
//
// Get integer value, or "Off" as 0,
// Ignore case.
//
int atoi_off(const char *value)
{
if (strcasecmp("Off", value) == 0)
return 0;
return atoi(value);
}
//
// Copy a text string to memory image.
// Clear unused part with spaces.
//
void copy_str(unsigned char *dest, const char *src, int nbytes)
{
int i;
for (i=0; i<nbytes; i++) {
*dest++ = (*src ? *src++ : ' ');
}
}
//
// Find a string in a table of size nelem, ignoring case.
// Return -1 when not found.
//
int string_in_table(const char *value, const char *tab[], int nelem)
{
int i;
for (i=0; i<nelem; i++) {
if (strcasecmp(tab[i], value) == 0) {
return i;
}
}
return -1;
}
//
// Print description of the parameter.
//
void print_options(FILE *out, const char **tab, int num, const char *info)
{
int i;
fprintf(out, "\n");
if (info)
fprintf(out, "# %s\n", info);
fprintf(out, "# Options:");
for (i=0; i<num; i++) {
if (i > 0)
fprintf(out, ",");
fprintf(out, " %s", tab[i]);
}
fprintf(out, "\n");
}
//
// Write Unicode symbol to file.
// Convert to UTF-8 encoding:
// 00000000.0xxxxxxx -> 0xxxxxxx
// 00000xxx.xxyyyyyy -> 110xxxxx, 10yyyyyy
// xxxxyyyy.yyzzzzzz -> 1110xxxx, 10yyyyyy, 10zzzzzz
//
void putc_utf8(unsigned short ch, FILE *out)
{
if (ch < 0x80) {
putc (ch, out);
} else if (ch < 0x800) {
putc (ch >> 6 | 0xc0, out);
putc ((ch & 0x3f) | 0x80, out);
} else {
putc (ch >> 12 | 0xe0, out);
putc (((ch >> 6) & 0x3f) | 0x80, out);
putc ((ch & 0x3f) | 0x80, out);
}
}