aboutsummaryrefslogtreecommitdiff
path: root/man/dbfp_init.3
blob: 1632cc52fe223f9f993f7c9047573b7cbaa7bcc7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
.\" Automatically generated by Pod::Man 4.07 (Pod::Simple 3.32)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.if !\nF .nr F 0
.if \nF>0 \{\
.    de IX
.    tm Index:\\$1\t\\n%\t"\\$2"
..
.    if !\nF==2 \{\
.        nr % 0
.        nr F 2
.    \}
.\}
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "DBFP_INIT 3"
.TH DBFP_INIT 3 "2016-06-10" "0.1.0" "DB timetable API"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
dbfp_init \- initialize the metadata for queries to the DB timetable API
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    #include <dbfp.h>
\&
\&    int dbfp_init(struct dbfp *dbfp, char *key);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBdbfp_init\fR initializes a \fIdbfp\fR structure that stores the metadata for
queries to the \s-1DB\s0 timetable \s-1API.  \s0\fIkey\fR is the \s-1API\s0 key to use for the
connections.  \fIdbfp\fR must already be allocated.  \fIdbfp\fR and \fIkey\fR must not
be \s-1NULL.  \s0\fIkey\fR is copied to the structure, so it can be changed or freed
after calling this function.
.PP
\&\fBdbfp\fR is a structure defined as:
.PP
.Vb 4
\&    struct dbfp {
\&            char *key;
\&            CURL *curl;
\&    };
.Ve
.PP
The user does not have to deal with the fields of this structure.
.PP
\&\fIdbfp\fR structures initialized with this method should be closed by calling
\&\fBdbfp_close\fR.
.SH "RETURN VALUE"
.IX Header "RETURN VALUE"
\&\fBdbfp_init\fR returns zero if successful, or a non-zero error code.  Positive
error codes are from \fIerrno.h\fR, negative error codes are specific to dbfp.
.SH "ERRORS"
.IX Header "ERRORS"
.IP "\s-1EINVAL\s0" 4
.IX Item "EINVAL"
if \fIdbfp\fR or \fIkey\fR is \s-1NULL\s0
.IP "\s-1ENOMEM\s0" 4
.IX Item "ENOMEM"
if there is not enoguh memory to copy \fIkey\fR to \fIdbfp\fR
.IP "\s-1DBFP_ERROR_CURL\s0" 4
.IX Item "DBFP_ERROR_CURL"
if curl could not be initialized
.SH "EXAMPLE"
.IX Header "EXAMPLE"
.Vb 4
\&    #include <dbfp.h>
\&    #include <stdio.h>
\&    #include <stdlib.h>
\&    #include <string.h>
\&    
\&    int main(int argc, char **argv)
\&    {
\&            struct dbfp dbfp;
\&            int err;
\&    
\&            err = dbfp_init(&dbfp, "API key");
\&            if (!err)
\&                    printf("DBFP structure created.\en");
\&            else
\&                    printf("Could not create DBFP: %s\en", strerror(err));
\&            dbfp_close(&dbfp);
\&            
\&            return err ? EXIT_FAILURE : EXIT_SUCCESS;
\&    }
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIdbfp_close\fR\|(3), \fIdbfp_query_departure\fR\|(3), \fIdbfp_query_location\fR\|(3)