Whitespace changes only: cleaning up trailing whitespace at EOL
This commit is contained in:
Oliver Jowett
parent
98d64483d6
commit
2142d2edf5
35 changed files with 350 additions and 349 deletions
50
mode_s.c
50
mode_s.c
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@ -4,20 +4,20 @@
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//
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// Copyright (c) 2014-2016 Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// 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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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// This file incorporates work covered by the following copyright and
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// This file incorporates work covered by the following copyright and
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// permission notice:
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//
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// Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
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@ -68,8 +68,8 @@
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//
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// Given the Downlink Format (DF) of the message, return the message length in bits.
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//
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// All known DF's 16 or greater are long. All known DF's 15 or less are short.
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// There are lots of unused codes in both category, so we can assume ICAO will stick to
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// All known DF's 16 or greater are long. All known DF's 15 or less are short.
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// There are lots of unused codes in both category, so we can assume ICAO will stick to
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// these rules, meaning that the most significant bit of the DF indicates the length.
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//
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int modesMessageLenByType(int type) {
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@ -86,7 +86,7 @@ int modesMessageLenByType(int type) {
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//
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// So every group of three bits A, B, C, D represent an integer from 0 to 7.
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//
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// The actual meaning is just 4 octal numbers, but we convert it into a hex
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// The actual meaning is just 4 octal numbers, but we convert it into a hex
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// number tha happens to represent the four octal numbers.
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//
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// For more info: http://en.wikipedia.org/wiki/Gillham_code
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@ -100,8 +100,8 @@ static int decodeID13Field(int ID13Field) {
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if (ID13Field & 0x0200) {hexGillham |= 0x2000;} // Bit 9 = A2
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if (ID13Field & 0x0100) {hexGillham |= 0x0040;} // Bit 8 = C4
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if (ID13Field & 0x0080) {hexGillham |= 0x4000;} // Bit 7 = A4
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//if (ID13Field & 0x0040) {hexGillham |= 0x0800;} // Bit 6 = X or M
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if (ID13Field & 0x0020) {hexGillham |= 0x0100;} // Bit 5 = B1
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//if (ID13Field & 0x0040) {hexGillham |= 0x0800;} // Bit 6 = X or M
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if (ID13Field & 0x0020) {hexGillham |= 0x0100;} // Bit 5 = B1
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if (ID13Field & 0x0010) {hexGillham |= 0x0001;} // Bit 4 = D1 or Q
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if (ID13Field & 0x0008) {hexGillham |= 0x0200;} // Bit 3 = B2
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if (ID13Field & 0x0004) {hexGillham |= 0x0002;} // Bit 2 = D2
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@ -157,13 +157,13 @@ static int decodeAC12Field(int AC12Field, altitude_unit_t *unit) {
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*unit = UNIT_FEET;
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if (q_bit) {
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/// N is the 11 bit integer resulting from the removal of bit Q at bit 4
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int n = ((AC12Field & 0x0FE0) >> 1) |
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int n = ((AC12Field & 0x0FE0) >> 1) |
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(AC12Field & 0x000F);
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// The final altitude is the resulting number multiplied by 25, minus 1000.
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return ((n * 25) - 1000);
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} else {
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// Make N a 13 bit Gillham coded altitude by inserting M=0 at bit 6
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int n = ((AC12Field & 0x0FC0) << 1) |
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int n = ((AC12Field & 0x0FC0) << 1) |
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(AC12Field & 0x003F);
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n = modeAToModeC(decodeID13Field(n));
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if (n < -12) {
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@ -182,7 +182,7 @@ static int decodeAC12Field(int AC12Field, altitude_unit_t *unit) {
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static unsigned decodeMovementField(unsigned movement) {
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int gspeed;
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// Note : movement codes 0,125,126,127 are all invalid, but they are
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// Note : movement codes 0,125,126,127 are all invalid, but they are
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// trapped for before this function is called.
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if (movement > 123) gspeed = 199; // > 175kt
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@ -200,7 +200,7 @@ static unsigned decodeMovementField(unsigned movement) {
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// (from bits 8-31) if it is affected by the given error
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// syndrome. Updates *addr and returns >0 if changed, 0 if
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// it was unaffected.
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static int correct_aa_field(uint32_t *addr, struct errorinfo *ei)
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static int correct_aa_field(uint32_t *addr, struct errorinfo *ei)
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{
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int i;
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int addr_errors = 0;
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@ -310,7 +310,7 @@ int scoreModesMessage(unsigned char *msg, int validbits)
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else
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return -1;
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}
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case 17: // Extended squitter
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case 18: // Extended squitter/non-transponder
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ei = modesChecksumDiagnose(crc, msgbits);
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@ -319,7 +319,7 @@ int scoreModesMessage(unsigned char *msg, int validbits)
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// fix any errors in the address field
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addr = getbits(msg, 9, 32);
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correct_aa_field(&addr, ei);
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correct_aa_field(&addr, ei);
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if (icaoFilterTest(addr))
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return 1800 / (ei->errors+1);
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@ -349,7 +349,7 @@ int scoreModesMessage(unsigned char *msg, int validbits)
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//
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//=========================================================================
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//
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// Decode a raw Mode S message demodulated as a stream of bytes by detectModeS(),
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// Decode a raw Mode S message demodulated as a stream of bytes by detectModeS(),
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// and split it into fields populating a modesMessage structure.
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//
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@ -458,7 +458,7 @@ int decodeModesMessage(struct modesMessage *mm, unsigned char *msg)
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mm->correctedbits = ei->errors;
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modesChecksumFix(msg, ei);
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addr2 = getbits(msg, 9, 32);
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// we are conservative here: only accept corrected messages that
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// match an existing aircraft.
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if (addr1 != addr2 && !icaoFilterTest(addr2)) {
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@ -492,7 +492,7 @@ int decodeModesMessage(struct modesMessage *mm, unsigned char *msg)
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default:
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// All other message types, we don't know how to handle their CRCs, give up
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return -2;
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}
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}
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// decode the bulk of the message
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@ -1175,7 +1175,7 @@ static void decodeExtendedSquitter(struct modesMessage *mm)
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decodeESOperationalStatus(mm, check_imf);
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break;
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default:
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default:
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break;
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}
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}
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@ -1755,8 +1755,8 @@ void displayModesMessage(struct modesMessage *mm) {
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//
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//=========================================================================
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//
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// When a new message is available, because it was decoded from the RTL device,
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// file, or received in the TCP input port, or any other way we can receive a
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// When a new message is available, because it was decoded from the RTL device,
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// file, or received in the TCP input port, or any other way we can receive a
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// decoded message, we call this function in order to use the message.
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//
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// Basically this function passes a raw message to the upper layers for further
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