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common.c
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common.c
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/*
* Copyright (c) 2019-2024, Dmitry (DiSlord) dislordlive@gmail.com
* Based on TAKAHASHI Tomohiro (TTRFTECH) edy555@gmail.com
* All rights reserved.
*
* This 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 3, or (at your option)
* any later version.
*
* The software 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <stdint.h>
#include <stdbool.h>
#include "hal.h"
// Use macro, std isdigit more big
#define _isdigit(c) (c >= '0' && c <= '9')
// Rewrite universal standart str to value functions to more compact
//
// Convert string to int32
int32_t my_atoi(const char *p) {
int32_t value = 0;
uint32_t c;
bool neg = false;
if (*p == '-') {neg = true; p++;}
if (*p == '+') p++;
while ((c = *p++ - '0') < 10)
value = value * 10 + c;
return neg ? -value : value;
}
// Convert string to uint32
// 0x - for hex radix
// 0o - for oct radix
// 0b - for bin radix
// default dec radix
uint32_t my_atoui(const char *p) {
uint32_t value = 0, radix = 10, c;
if (*p == '+') p++;
if (*p == '0') {
switch (p[1]) {
case 'x': radix = 16; break;
case 'o': radix = 8; break;
case 'b': radix = 2; break;
default: goto calculate;
}
p+=2;
}
calculate:
while (1) {
c = *p++ - '0';
// c = to_upper(*p) - 'A' + 10
if (c >= 'A' - '0') c = (c&(~0x20)) - ('A' - '0') + 10;
if (c >= radix) return value;
value = value * radix + c;
}
}
float my_atof(const char *p) {
int neg = false;
if (*p == '-')
neg = true;
if (*p == '-' || *p == '+')
p++;
float x = my_atoi(p);
while (_isdigit((int)*p))
p++;
if (*p == '.' || *p == ',') {
float d = 1.0f;
p++;
while (_isdigit((int)*p)) {
d *= 1e-1f;
x += d * (*p - '0');
p++;
}
}
if (*p) {
int exp = 0;
if (*p == 'e' || *p == 'E') exp = my_atoi(&p[1]);
else if (*p == 'G') exp = 9; // Giga
else if (*p == 'M') exp = 6; // Mega
else if (*p == 'k') exp = 3; // kilo
else if (*p == 'm') exp = -3; // milli
else if (*p == 'u') exp = -6; // micro
else if (*p == 'n') exp = -9; // nano
else if (*p == 'p') exp =-12; // pico
if (exp > 0) do {x*= 1e+1f;} while (--exp);
if (exp < 0) do {x*= 1e-1f;} while (++exp);
}
return neg ? -x : x;
}
static char to_lower(char c) {return (c >='A' && c <= 'Z') ? c - 'A' + 'a' : c;}
bool strcmpi(const char *t1, const char *t2) {
int i = 0;
while (1) {
char ch1 = to_lower(t1[i]), ch2 = to_lower(t2[i]);
if (ch1 != ch2) return false;
if (ch1 == 0) return true;
i++;
}
}
//
// Function used for search substring v in list
// Example need search parameter "center" in "start|stop|center|span|cw" getStringIndex return 2
// If not found return -1
// Used for easy parse command arguments
int get_str_index(const char *v, const char *list) {
int i = 0;
while (1) {
const char *p = v;
while (1) {
char c = *list;
if (c == '|') c = 0;
if (c == *p++) {
// Found, return index
if (c == 0) return i;
list++; // Compare next symbol
continue;
}
break; // Not equal, break
}
// Set new substring ptr
while (1) {
// End of string, not found
if (*list == 0) return -1;
if (*list++ == '|') break;
}
i++;
}
return -1;
}
/*
* Search first symbols (s2) entry in string (s1)
*/
static inline char* _strpbrk(char *s1, const char *s2) {
do {
const char *s = s2;
while(*s) if (*s++ == *s1) return s1;
} while(*++s1);
return s1;
}
/*
* Split line by arguments, return arguments count
*/
int parse_line(char *line, char* args[], int max_cnt) {
char *lp = line, c;
const char *brk;
uint16_t nargs = 0;
while ((c = *lp) != 0) { // While not end
if (c != ' ' && c != '\t') { // Skipping white space and tabs.
if (c == '"') {lp++; brk = "\""; } // string end is next quote or end
else { brk = " \t";} // string end is tab or space or end
if (nargs < max_cnt) args[nargs] = lp; // Put pointer in args buffer (if possible)
nargs++; // Substring count
lp = _strpbrk(lp, brk); // search end
if (*lp == 0) break; // Stop, end of input string
*lp = 0; // Set zero at the end of substring
}
lp++;
}
return nargs;
}
/*
* Swap byte order in uint16_t buffer
*/
void swap_bytes(uint16_t *buf, int size) {
for (int i = 0; i < size; i++)
buf[i] = __REVSH(buf[i]); // swap byte order (example 0x10FF to 0xFF10)
}