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
|
.TH LIBSIMPLE_TIMESPECTOSTR 3 2018-10-30 libsimple
.SH NAME
libsimple_timespectostr, libsimple_timevaltostr \- convert a duration data structure to a string
.SH SYNOPSIS
.nf
#include <libsimple.h>
char *libsimple_timespectostr(char *restrict \fIbuf\fP, const struct timespec *restrict \fIts\fP);
char *libsimple_timevaltostr(char *restrict \fIbuf\fP, const struct timeval *restrict \fItv\fP);
#ifndef timespectostr
# define timespectostr libsimple_timespectostr
#endif
#ifndef timevaltostr
# define timevaltostr libsimple_timevaltostr
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_timespectostr ()
and
.BR libsimple_timevaltostr ()
functions convert
.I ts
and
.IR tv ,
respectively, to a textual represention contain only a
real value of the number of seconds the input represents.
.PP
If
.I buf
is
.BR NULL ,
a new pointer is allocated, otherwise
.I buf
is used as storage buffer for the string and is returned.
Unless
.I buf
is
.BR NULL ,
it should be at least
.I INTSTRLEN(time_t)+12
bytes for the
.BR libsimple_timespectostr ()
function, and less 3 bytes
for the
.BR libsimple_timevaltostr ()
function.
.PP
The returned string will always start with either a
.B +
or a
.BR \- ,
and will always contain 9 (for the
.BR libsimple_timespectostr ()
function) or 6 (for the
.BR libsimple_timevaltostr ()
function) decimals.
.SH RETURN VALUE
The
.BR libsimple_timespectostr ()
and
.BR libsimple_timevaltostr ()
functions return the duration as a textual
representation of the it as a real value of
seconds, without any unit included in the text,
upon successful completion. If
.I buf
is
.BR NULL ,
the returned pointer is a deallocatable, unique,
pointer, otherwise the pointer
.I buf
is returned. On failure,
.B NULL
is returned.
.SH ERRORS
The
.BR libsimple_timespectostr ()
and
.BR libsimple_timevaltostr ()
functions fail if:
.TP
.B ENOMEM
.I buf
is
.B NULL
and the call to
.BR malloc (3)
failed because it could not allocate enough memory.
.TP
.B EINVAL
.I ts->tv_nsec
is negative or greater than 999\ 999\ 999, or
.I tv->tv_usec
is negative or greater than 999\ 999.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface Attribute Value
T{
.BR libsimple_timespectostr ()
.br
.BR libsimple_timevaltostr ()
T} Thread safety MT-Safe
T{
.BR libsimple_timespectostr ()
.br
.BR libsimple_timevaltostr ()
T} Async-signal safety AS-Safe
T{
.BR libsimple_timespectostr ()
.br
.BR libsimple_timevaltostr ()
T} Async-cancel safety AC-Safe
.TE
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
None.
.SH BUGS
None.
.SH SEE ALSO
.BR libsimple_minimise_number_string (3),
.BR libsimple_sumtimespec (3),
.BR libsimple_difftimespec (3),
.BR libsimple_multimespec (3),
.BR libsimple_cmptimespec (3),
.BR libsimple_strtotimespec (3),
.BR libsimple_timespectodouble (3),
.BR libsimple_doubletotimespec (3),
.BR libsimple_timeval2timespec (3)
|
