LSST Applications g2079a07aa2+86d27d4dc4,g2305ad1205+a659bff248,g2bbee38e9b+3c60f8fe34,g337abbeb29+3c60f8fe34,g33d1c0ed96+3c60f8fe34,g3502564af9+d77d6d1350,g3a166c0a6a+3c60f8fe34,g487adcacf7+25d9892218,g4be5004598+d77d6d1350,g50ff169b8f+96c6868917,g52b1c1532d+585e252eca,g591dd9f2cf+4d81263f9a,g5cd07815a0+980d2b1c3b,g607f77f49a+d77d6d1350,g858d7b2824+d77d6d1350,g88963caddf+83e433e629,g99cad8db69+a4d3c48eeb,g9ddcbc5298+9a081db1e4,ga1e77700b3+bcf1af89ad,ga57fefb910+9a39d7b2d7,gae0086650b+585e252eca,gb065fddaf9+4f9fd82a2c,gb0e22166c9+60f28cb32d,gb363559e06+d84b1d3d07,gb3b7280ab2+4563d032e1,gb4b16eec92+babe958938,gba4ed39666+c2a2e4ac27,gbb8dafda3b+ed6854b564,gc120e1dc64+b72d212f87,gc28159a63d+3c60f8fe34,gc3e9b769f7+921dbcd359,gcf0d15dbbd+9a39d7b2d7,gdaeeff99f8+f9a426f77a,gddc38dedce+585e252eca,ge79ae78c31+3c60f8fe34,w.2024.21
LSST Data Management Base Package
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xpa.cc
Go to the documentation of this file.
1/*
2 * LSST Data Management System
3 *
4 * This product includes software developed by the
5 * LSST Project (http://www.lsst.org/).
6 * See the COPYRIGHT file
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the LSST License Statement and
19 * the GNU General Public License along with this program. If not,
20 * see <https://www.lsstcorp.org/LegalNotices/>.
21 */
22#include "pybind11/pybind11.h"
23
24#include "xpa.h"
26
27namespace py = pybind11;
28using namespace pybind11::literals;
29
30namespace lsst {
31namespace display {
32namespace ds9 {
33
34namespace {
35
36class myXPA {
37public:
38 static XPA get(bool reset = false) {
39 static myXPA *singleton = NULL;
40
41 if (reset && singleton != NULL) {
42 delete singleton;
43 singleton = NULL;
44 }
45
46 if (singleton == NULL) {
47 singleton = new myXPA("w");
48 }
49
50 return singleton->_xpa;
51 }
52
53private:
54 myXPA(myXPA &) = delete;
55 myXPA operator=(myXPA const &) = delete;
56
57 myXPA(char const *mode) {
58 _xpa = XPAOpen((char *)mode);
59
60 if (_xpa == NULL) {
61 throw LSST_EXCEPT(lsst::pex::exceptions::IoError, "Unable to open XPA");
62 }
63 }
64
65 ~myXPA() { XPAClose(_xpa); }
66
67 static XPA _xpa; // the real XPA connection
68};
69
70XPA myXPA::_xpa = NULL;
71
72/*
73 * A binding for XPAGet that talks to only one server, but doesn't have to talk (char **) with SWIG
74 */
75const char *XPAGet1(XPA xpa, char *xtemplate, char *paramlist, char *mode) {
76 char *buf = NULL; /* desired response */
77 size_t len = 0; /* length of buf; ignored */
78 char *error = NULL; /* returned error if any*/
79
80 if (xpa == NULL) {
81 xpa = myXPA::get();
82 }
83
84 int n = XPAGet(xpa, xtemplate, paramlist, mode, &buf, &len, NULL, &error, 1);
85
86 if (n == 0) {
87 throw LSST_EXCEPT(lsst::pex::exceptions::IoError, "XPAGet returned 0");
88 }
89 if (error != NULL) {
90 return error;
91 }
92 if (buf == NULL) {
93 throw LSST_EXCEPT(lsst::pex::exceptions::IoError, "XPAGet returned a null buffer pointer");
94 }
95
96 return (buf);
97}
98
99const char *XPASet1(XPA xpa, char *xtemplate, char *paramlist, char *mode,
100 char *buf, // desired extra data
101 int len = -1) // length of buf (or -1 to compute automatically)
102{
103 if (len < 0) {
104 len = strlen(buf); // length of buf
105 }
106 char *error = NULL; // returned error if any
107
108 if (xpa == NULL) {
109 xpa = myXPA::get();
110 }
111
112 int n = XPASet(xpa, xtemplate, paramlist, mode, buf, len, NULL, &error, 1);
113
114 if (n == 0) {
115 throw LSST_EXCEPT(lsst::pex::exceptions::IoError, "XPASet returned 0");
116 }
117 if (error != NULL) {
118 return error;
119 }
120
121 return "";
122}
123
124const char *XPASetFd1(XPA xpa, char *xtemplate, char *paramlist, char *mode,
125 int fd) /* file descriptor for xpa to read */
126{
127 char *error = NULL; /* returned error if any*/
128
129 if (xpa == NULL) {
130 xpa = myXPA::get();
131 }
132
133 int n = XPASetFd(xpa, xtemplate, paramlist, mode, fd, NULL, &error, 1);
134
135 if (n == 0) {
136 throw LSST_EXCEPT(lsst::pex::exceptions::IoError, "XPASetFd returned 0");
137 }
138 if (error != NULL) {
139 return error;
140 }
141 return "";
142}
143
144void reset() { myXPA::get(true); }
145
146} // <anonymous>
147
149 py::module::import("lsst.pex.exceptions");
150
151 py::class_<xparec> cls(mod, "xparec");
152 cls.def(py::init<>());
153
154 mod.def("get", &XPAGet1, "xpa"_a, "xtemplate"_a, "paramList"_a, "mode"_a);
155 mod.def("reset", &reset);
156 mod.def("set", &XPASet1, "xpa"_a, "xtemplate"_a, "paramList"_a, "mode"_a, "buf"_a, "len"_a = -1);
157 mod.def("setFd1", &XPASetFd1, "xpa"_a, "xtemplate"_a, "paramList"_a, "mode"_a, "fd"_a);
158}
159
160} // ds9
161} // display
162} // lsst
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition Exception.h:48
Reports errors in external input/output operations.
Definition Runtime.h:160
PYBIND11_MODULE(xpa, mod)
Definition xpa.cc:148
T strlen(T... args)