kopia lustrzana https://github.com/F5OEO/ft8_lib
349 wiersze
9.3 KiB
C++
349 wiersze
9.3 KiB
C++
#include "pack.h"
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#include "text.h"
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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namespace ft8 {
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// TODO: This is wasteful, should figure out something more elegant
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const char A0[] = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ+-./?";
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const char A1[] = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const char A2[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const char A3[] = "0123456789";
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const char A4[] = " ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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// Pack a special token, a 22-bit hash code, or a valid base call
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// into a 28-bit integer.
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int32_t pack28(const char *callsign) {
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constexpr int32_t NTOKENS = 2063592L;
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constexpr int32_t MAX22 = 4194304L;
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// Check for special tokens first
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if (starts_with(callsign, "DE ")) return 0;
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if (starts_with(callsign, "QRZ ")) return 1;
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if (starts_with(callsign, "CQ ")) return 2;
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if (starts_with(callsign, "CQ_")) {
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int nnum = 0, nlet = 0;
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// TODO:
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// if(nnum.eq.3 .and. nlet.eq.0) then n28=3+nqsy
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// if(nlet.ge.1 .and. nlet.le.4 .and. nnum.eq.0) then n28=3+1000+m
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}
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// TODO: Check for <...> callsign
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// if(text(1:1).eq.'<')then
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// call save_hash_call(text,n10,n12,n22) !Save callsign in hash table
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// n28=NTOKENS + n22
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char c6[6] = {' ', ' ', ' ', ' ', ' ', ' '};
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int length = 0; // strlen(callsign); // We will need it later
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while (callsign[length] != ' ' && callsign[length] != 0) {
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length++;
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}
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// Copy callsign to 6 character buffer
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if (starts_with(callsign, "3DA0") && length <= 7) {
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// Work-around for Swaziland prefix: 3DA0XYZ -> 3D0XYZ
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memcpy(c6, "3D0", 3);
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memcpy(c6 + 3, callsign + 4, length - 4);
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}
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else if (starts_with(callsign, "3X") && is_letter(callsign[2]) && length <= 7) {
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// Work-around for Guinea prefixes: 3XA0XYZ -> QA0XYZ
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memcpy(c6, "Q", 1);
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memcpy(c6 + 1, callsign + 2, length - 2);
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}
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else {
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if (is_digit(callsign[2]) && length <= 6) {
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// AB0XYZ
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memcpy(c6, callsign, length);
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}
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else if (is_digit(callsign[1]) && length <= 5) {
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// A0XYZ -> " A0XYZ"
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memcpy(c6 + 1, callsign, length);
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}
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}
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// Check for standard callsign
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int i0, i1, i2, i3, i4, i5;
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if ((i0 = char_index(A1, c6[0])) >= 0 && (i1 = char_index(A2, c6[1])) >= 0 &&
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(i2 = char_index(A3, c6[2])) >= 0 && (i3 = char_index(A4, c6[3])) >= 0 &&
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(i4 = char_index(A4, c6[4])) >= 0 && (i5 = char_index(A4, c6[5])) >= 0)
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{
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//printf("Pack28: idx=[%d, %d, %d, %d, %d, %d]\n", i0, i1, i2, i3, i4, i5);
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// This is a standard callsign
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int32_t n28 = i0;
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n28 = n28 * 36 + i1;
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n28 = n28 * 10 + i2;
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n28 = n28 * 27 + i3;
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n28 = n28 * 27 + i4;
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n28 = n28 * 27 + i5;
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//printf("Pack28: n28=%d (%04xh)\n", n28, n28);
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return NTOKENS + MAX22 + n28;
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}
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//char text[13];
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//if (length > 13) return -1;
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// TODO:
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// Treat this as a nonstandard callsign: compute its 22-bit hash
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// call save_hash_call(text,n10,n12,n22) !Save callsign in hash table
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// n28=NTOKENS + n22
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// n28=iand(n28,ishft(1,28)-1)
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return -1;
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}
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// Check if a string could be a valid standard callsign or a valid
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// compound callsign.
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// Return base call "bc" and a logical "cok" indicator.
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bool chkcall(const char *call, char *bc) {
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int length = strlen(call); // n1=len_trim(w)
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if (length > 11) return false;
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if (0 != strchr(call, '.')) return false;
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if (0 != strchr(call, '+')) return false;
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if (0 != strchr(call, '-')) return false;
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if (0 != strchr(call, '?')) return false;
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if (length > 6 && 0 != strchr(call, '/')) return false;
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// TODO: implement suffix parsing (or rework?)
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//bc=w(1:6)
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//i0=char_index(w,'/')
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//if(max(i0-1,n1-i0).gt.6) go to 100 !Base call must be < 7 characters
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//if(i0.ge.2 .and. i0.le.n1-1) then !Extract base call from compound call
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// if(i0-1.le.n1-i0) bc=w(i0+1:n1)//' '
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// if(i0-1.gt.n1-i0) bc=w(1:i0-1)//' '
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return true;
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}
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uint16_t packgrid(const char *grid4) {
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constexpr uint16_t MAXGRID4 = 32400;
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if (grid4 == 0) {
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// Two callsigns only, no report/grid
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return MAXGRID4 + 1;
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}
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// Take care of special cases
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if (equals(grid4, "RRR")) return MAXGRID4 + 2;
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if (equals(grid4, "RR73")) return MAXGRID4 + 3;
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if (equals(grid4, "73")) return MAXGRID4 + 4;
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// Check for standard 4 letter grid
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if (in_range(grid4[0], 'A', 'R') &&
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in_range(grid4[1], 'A', 'R') &&
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is_digit(grid4[2]) && is_digit(grid4[3]))
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{
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//if (w(3).eq.'R ') ir=1
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uint16_t igrid4 = (grid4[0] - 'A');
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igrid4 = igrid4 * 18 + (grid4[1] - 'A');
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igrid4 = igrid4 * 10 + (grid4[2] - '0');
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igrid4 = igrid4 * 10 + (grid4[3] - '0');
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return igrid4;
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}
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// Parse report: +dd / -dd / R+dd / R-dd
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// TODO: check the range of dd
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if (grid4[0] == 'R') {
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int dd = dd_to_int(grid4 + 1, 3);
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uint16_t irpt = 35 + dd;
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return (MAXGRID4 + irpt) | 0x8000; // ir = 1
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}
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else {
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int dd = dd_to_int(grid4, 3);
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uint16_t irpt = 35 + dd;
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return (MAXGRID4 + irpt); // ir = 0
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}
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return MAXGRID4 + 1;
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}
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// Pack Type 1 (Standard 77-bit message) and Type 2 (ditto, with a "/P" call)
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int pack77_1(const char *msg, uint8_t *b77) {
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// Locate the first delimiter
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const char *s1 = strchr(msg, ' ');
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if (s1 == 0) return -1;
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const char *call1 = msg; // 1st call
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const char *call2 = s1 + 1; // 2nd call
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int32_t n28a = pack28(call1);
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int32_t n28b = pack28(call2);
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if (n28a < 0 || n28b < 0) return -1;
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uint16_t igrid4;
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// Locate the second delimiter
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const char *s2 = strchr(s1 + 1, ' ');
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if (s2 != 0) {
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igrid4 = packgrid(s2 + 1);
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}
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else {
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// Two callsigns, no grid/report
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igrid4 = packgrid(0);
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}
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uint8_t i3 = 1; // No suffix or /R
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// TODO: check for suffixes
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// if(char_index(w(1),'/P').ge.4 .or. char_index(w(2),'/P').ge.4) i3=2 !Type 2, with "/P"
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// if(char_index(w(1),'/P').ge.4 .or. char_index(w(1),'/R').ge.4) ipa=1
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// if(char_index(w(2),'/P').ge.4 .or. char_index(w(2),'/R').ge.4) ipb=1
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// Shift in ipa and ipb bits into n28a and n28b
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n28a <<= 1; // ipa = 0
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n28b <<= 1; // ipb = 0
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// Pack into (28 + 1) + (28 + 1) + (1 + 15) + 3 bits
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// write(c77,1000) n28a,ipa,n28b,ipb,ir,igrid4,i3
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// 1000 format(2(b28.28,b1),b1,b15.15,b3.3)
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b77[0] = (n28a >> 21);
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b77[1] = (n28a >> 13);
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b77[2] = (n28a >> 5);
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b77[3] = (uint8_t)(n28a << 3) | (uint8_t)(n28b >> 26);
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b77[4] = (n28b >> 18);
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b77[5] = (n28b >> 10);
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b77[6] = (n28b >> 2);
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b77[7] = (uint8_t)(n28b << 6) | (uint8_t)(igrid4 >> 10);
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b77[8] = (igrid4 >> 2);
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b77[9] = (uint8_t)(igrid4 << 6) | (uint8_t)(i3 << 3);
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return 0;
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}
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void packtext77(const char *text, uint8_t *b71) {
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int length = strlen(text);
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// Skip leading and trailing spaces
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while (*text == ' ' && *text != 0) {
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++text;
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--length;
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}
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while (length > 0 && text[length - 1] == ' ') {
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--length;
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}
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for (int i = 0; i < 9; ++i) {
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b71[i] = 0;
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}
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for (int j = 0; j < 13; ++j) {
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// Multiply the long integer in b71 by 42
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uint16_t x = 0;
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for (int i = 8; i >= 0; --i) {
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x += b71[i] * (uint16_t)42;
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b71[i] = (x & 0xFF);
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x >>= 8;
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}
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// Add index of the current char
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if (j < length) {
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int q = char_index(A0, text[j]);
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x = (q > 0) ? q : 0;
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}
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else {
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x = 0;
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}
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for (int i = 8; i >= 0; --i) {
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if (x == 0) break;
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x += b71[i];
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b71[i] = (x & 0xFF);
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x >>= 8;
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}
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}
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}
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int pack77(const char *msg, uint8_t *c77) {
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// Check Type 1 (Standard 77-bit message) or Type 2, with optional "/P"
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//if (starts_with(msg, "CQ ")) {
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return pack77_1(msg, c77);
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//}
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// TODO:
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// Check 0.5 (telemetry)
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// i3=0 n3=5 write(c77,1006) ntel,n3,i3 1006 format(b23.23,2b24.24,2b3.3)
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// Check Type 4 (One nonstandard call and one hashed call)
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// pack77_4(nwords,w,i3,n3,c77)
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// Default to free text
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// i3=0 n3=0
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// packtext77(msg(1:13),c77(1:71))
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// write(c77(72:77),'(2b3.3)') n3,i3
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}
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}; // namespace
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#ifdef UNIT_TEST
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#include <iostream>
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using namespace std;
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bool test1() {
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const char *inputs[] = {
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"",
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" ",
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"ABC",
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"A9",
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"L9A",
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"L7BC",
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"L0ABC",
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"LL3JG",
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"LL3AJG",
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"CQ ",
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0
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};
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for (int i = 0; inputs[i]; ++i) {
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int32_t result = ft8_v2::pack28(inputs[i]);
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printf("pack28(\"%s\") = %d\n", inputs[i], result);
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}
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return true;
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}
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bool test2() {
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const char *inputs[] = {
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"CQ LL3JG",
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"CQ LL3JG KO26",
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"L0UAA LL3JG KO26",
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"L0UAA LL3JG +02",
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"L0UAA LL3JG RRR",
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"L0UAA LL3JG 73",
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0
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};
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for (int i = 0; inputs[i]; ++i) {
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uint8_t result[10];
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int rc = ft8_v2::pack77_1(inputs[i], result);
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printf("pack77_1(\"%s\") = %d\t[", inputs[i], rc);
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for (int j = 0; j < 10; ++j) {
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printf("%02x ", result[j]);
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}
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printf("]\n");
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}
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return true;
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}
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int main() {
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test1();
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test2();
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return 0;
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}
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#endif |