160 lines
3.6 KiB
C
160 lines
3.6 KiB
C
/*
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* Copyright (C) 12 Jun 2003 Tomas Cermak
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*
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* This file is part of wmradio program.
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "stationnames.h"
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#include "rc.h"
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#define STATION_NAMES_INTERVAL 0.03
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char *freqtostr(int freq)
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{
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static char buffer[10];
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sprintf(buffer, "%i.%.2i\n", freq / 100,freq % 100);
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return buffer;
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}
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int ato100i(char *str)
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{
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char *p,*q;
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int result,tmp;
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p = strstr(str,".");
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if(!p) {
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return atoi(str) * 100;
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}
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q = p; q++;
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*p = 0;
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result = atoi(str) * 100;
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tmp = atoi(q);
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*p = '.';
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switch(strlen(q)) {
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case 1:
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result += 10 * tmp;
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break;
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case 2:
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result += tmp;
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}
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return result;
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}
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IniVariable *station_find_by_name(char *name)
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{
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return rc_get_variable_ini_variable(SECTION_NAMES,name);
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}
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IniVariable *station_find_by_freq(int freq)
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{
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IniSection *section;
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IniVariable *variable;
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List *item;
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int cfreq;
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section = rc_get_section(SECTION_NAMES);
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if(!section) return NULL;
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for(item = section->variables; item; item = item->next) {
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variable = item->data;
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cfreq = ato100i(variable->value);
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if((cfreq > freq - STATION_NAMES_INTERVAL) &&(cfreq < freq + STATION_NAMES_INTERVAL))
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return variable;
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}
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return NULL;
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}
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void station_add(char *name, int freq)
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{
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rc_set_variable(SECTION_NAMES,name,freqtostr(freq));
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}
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char *station_get_freq_name(int freq)
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{
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IniVariable *variable;
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variable = station_find_by_freq(freq);
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if(!variable) return NULL;
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return variable->name;
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}
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void station_set_freq_name(int freq, char *name)
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{
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rc_set_variable(SECTION_NAMES,name,freqtostr(freq));
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}
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List *station_nearest(int freq)
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{
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IniSection *section;
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List *item,*current;
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IniVariable *item_var;
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int delta;
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section = rc_get_section(SECTION_NAMES);
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if(! section ) return NULL;
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item = current = section -> variables;
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if(!item) return NULL;
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item_var = item->data;
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delta = abs(freq - ato100i(item_var->value));
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while(item) {
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item_var = item->data;
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if(abs(freq - ato100i(item_var->value)) < delta) {
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current = item;
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delta = abs(freq - ato100i(item_var->value));
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}
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item = item->next;
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}
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return current;
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}
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int station_next_freq(int freq)
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{
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IniVariable *item_var;
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List *item;
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item = station_nearest(freq);
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if(!item) return freq;
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if(item->next) {
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item_var = item->next->data;
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return ato100i(item_var->value);
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}
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while(item->prev) item = item->prev;
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item_var = item->data;
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return ato100i(item_var->value);
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}
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int station_prev_freq(int freq)
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{
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IniVariable *item_var;
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List *item;
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item = station_nearest(freq);
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if(!item) return freq;
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if(item->prev) {
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item_var = item->prev->data;
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return ato100i(item_var->value);
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}
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while(item->next) item = item->next;
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item_var = item->data;
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return ato100i(item_var->value);
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}
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