source: Sophya/trunk/Poubelle/archTOI.old/gpsparser.cc@ 342

Last change on this file since 342 was 342, checked in by ansari, 26 years ago

archtoi 2 aout 99
File size: 3.0 KB
Line 
1#include <string.h>
2#include <stdio.h>
3
4#include "gpsparser.h"
5
6GPSParser::GPSParser() {
7 *gpsString = 0;
8 stringOk = false;
9 gpsutc = 0;
10 gpslat = 0;
11 gpslong = 0;
12 quality = 0;
13 nsat = 0;
14 hdop = 0;
15 alt = 0;
16 gsep = 0;
17}
18
19GPSParser::~GPSParser() {
20}
21
22bool GPSParser::hasTime() {
23 return (stringOk && gpsutc>0);
24}
25
26bool GPSParser::hasGPSTime() {
27 return (stringOk && gpsutc>0 && quality>0 && nsat>=3);
28}
29
30bool GPSParser::hasPosition() {
31 return (stringOk && quality>0 && nsat>=3);
32}
33
34bool GPSParser::hasAltitude() {
35 return (stringOk && quality>0 && nsat>=4);
36}
37
38double GPSParser::getUTC() {
39 if (!stringOk) return -99999;
40 return gpsutc;
41}
42
43double GPSParser::getLatitude() {
44 if (!stringOk) return -99999;
45 if (quality == 0 || nsat<3) return -99999;
46 return gpslat;
47}
48
49double GPSParser::getLongitude() {
50 if (!stringOk) return -99999;
51 if (quality == 0 || nsat<3) return -99999;
52 return gpslong;
53}
54
55double GPSParser::getAltitude() {
56 if (!stringOk) return -99999;
57 if (quality == 0 || nsat<4) return -99999;
58 return alt;
59}
60
61// GPGGA string :
62// $hhmmss.ss,ddmm.mmmm,n,dddmm.mmmm,e,q,ss,y.y,a.a,z,,
63// $104020,3740.712,N,00400.781,W,0,00,01.0,0003,M,-050,M,,
64
65#include <fstream.h>
66#include <iomanip.h>
67ofstream gpsdump("gpsdump");
68ofstream gpsdata("gpsdata");
69double outc = 0; double jr = 0;
70
71void GPSParser::ProcessBlock(block_type_gps* blk) {
72 strncpy(gpsString, blk->gps, 80);
73 char* p = gpsString;
74 gpsdump << p ; if (p[strlen(p)-1] != '\n') gpsdump << '\n';
75 char* fence = p+80;
76 stringOk = false;
77 if (*p!='$') return;
78 p++;
79
80 // UTC
81 double t;
82 sscanf(p, "%lg", &t);
83 int h = int(t/10000); t -= h*10000;
84 int m = int(t/100); t -= m*100;
85 gpsutc = h*3600. + m*60. + t;
86 p += 6;
87 if (*p != ',') return;
88 p++;
89 if (p>=fence) return;
90
91 // LATITUDE
92 sscanf(p, "%lg", &t);
93 int d = int(t/100); t -= d*100;
94 t = d + t/60;
95 p += 8;
96 if (*p != ',') return;
97 p++;
98 if (*p == 'S') t = -t;
99 gpslat = t;
100 p++;
101 if (*p != ',') return;
102 p++;
103 if (p>=fence) return;
104
105 // LONGITUDE
106 sscanf(p, "%lg", &t);
107 d = int(t/100); t -= d*100;
108 t = d + t/60;
109 p += 9;
110 if (*p != ',') return;
111 p++;
112 if (*p == 'W') t = -t;
113 gpslong = t;
114 p++;
115 if (*p != ',') return;
116 p++;
117 if (p>=fence) return;
118
119 // QUALITY
120 quality = *p - '0';
121 if (quality < 0 || quality > 9) return;
122 p++;
123 if (*p != ',') return;
124 p++;
125 if (p>=fence) return;
126
127 // NSAT
128 sscanf(p, "%d", &nsat);
129 p += 2;
130 if (*p != ',') return;
131 p++;
132
133 // HDOP
134 sscanf(p, "%lg", &hdop);
135 while (*p != ',' && p<fence) p++;
136 if (*p != ',') return;
137 p++;
138
139 // Altitude
140 sscanf(p, "%lg", &alt);
141 while (*p != ',' && p<fence) p++;
142 if (*p != ',') return;
143 p++;
144 if (*p != 'M') return;
145 p++;
146 if (*p != ',') return;
147 p++;
148
149 // Geoid separation
150 sscanf(p, "%lg", &gsep);
151 while (*p != ',' && p<fence) p++;
152 if (*p != ',') return;
153 p++;
154 if (*p != 'M') return;
155
156 if (gpsutc < outc) jr += 86400;
157 outc = gpsutc;
158 gpsdata << setprecision(10) << gpsutc + jr << " " << gpslat << " " << gpslong << " " << quality << " " << nsat << '\n';
159
160 stringOk = true;
161}
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