LSST Applications 27.0.0,g0265f82a02+469cd937ee,g02d81e74bb+21ad69e7e1,g1470d8bcf6+cbe83ee85a,g2079a07aa2+e67c6346a6,g212a7c68fe+04a9158687,g2305ad1205+94392ce272,g295015adf3+81dd352a9d,g2bbee38e9b+469cd937ee,g337abbeb29+469cd937ee,g3939d97d7f+72a9f7b576,g487adcacf7+71499e7cba,g50ff169b8f+5929b3527e,g52b1c1532d+a6fc98d2e7,g591dd9f2cf+df404f777f,g5a732f18d5+be83d3ecdb,g64a986408d+21ad69e7e1,g858d7b2824+21ad69e7e1,g8a8a8dda67+a6fc98d2e7,g99cad8db69+f62e5b0af5,g9ddcbc5298+d4bad12328,ga1e77700b3+9c366c4306,ga8c6da7877+71e4819109,gb0e22166c9+25ba2f69a1,gb6a65358fc+469cd937ee,gbb8dafda3b+69d3c0e320,gc07e1c2157+a98bf949bb,gc120e1dc64+615ec43309,gc28159a63d+469cd937ee,gcf0d15dbbd+72a9f7b576,gdaeeff99f8+a38ce5ea23,ge6526c86ff+3a7c1ac5f1,ge79ae78c31+469cd937ee,gee10cc3b42+a6fc98d2e7,gf1cff7945b+21ad69e7e1,gfbcc870c63+9a11dc8c8f
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)