man/man1/rsplit.1

.\" RCSid "$Id: rsplit.1,v 1.7 2019/08/22 21:54:46 greg Exp $"
.TH RSPLIT 1 7/8/97 RADIANCE
.SH NAME
rsplit - splits standard input into multiple output files or streams
.SH SYNOPSIS
.B rsplit
[
.B \-tS
][
.B \-ih
][
.B \-iH
][
.B \-oh
][
.B \-oH
][
.B "\-x xres \-y yres"
][
.B \-oaN
|
.B \-ofN
|
.B \-odN
|
.B \-ocN
|
.B \-oiN
|
.B \-owN
|
.B \-obN
][
.B \-f
][
.B \-a
][
.B "\-on M"
]
output1 [options] output2 ..
.SH DESCRIPTION
.I Rsplit
writes lines or fields from the standard input to one or more output
streams.
By default, fields are separated by a
newline character (i.e., input is distributed by lines),
but the terminator can be changed using the
.I \-t
option.
If a space is specified as the terminator, then fields are separated by
any number of white spaces, including tabs, returns, and newlines.
Different terminators may be given for different fields by specifying
additional
.I \-t
options between each output specification.
Note that there is no space between this option and its argument, and
certain arguments, such as a space or a tab, must be quoted or escaped
with a backslash in most shells.
If no argument is given, the default newline terminator is re-established.
.PP
An output is either a file or a command.
If an output file exists, it will not be overwritten unless the
.I \-f
option is given, or it is being appended using the
.I \-a
option.
Commands are given in quotes, and begin with an exclamantion point ('!').
.PP
The
.I \-oa
option may be used to specify ASCII data (the default), or the
.I \-of
option may be used to indicated binary IEEE 32-bit floats.
Similarly, the
.I \-od
and
.I \-oi
options may be used to indicate binary 64-bit doubles or integer words,
respectively.
The
.I \-ow
option specifies 2-byte short words, and the
.I \-ob
option specifies bytes.
If a number immediately follows any of these options, then it
indicates that multiple such values are expected for each record.
For example,
.I \-of3
indicates three floats per output record for the next named output.
In the case of the
.I \-oa
option, no number writes one line or field per stream, and numbers
greater than zero write multiple fields per record to the same stream.
If the terminating character is set to something other than newline ('\\n'),
a newline is added after each record (in addition to the terminator).
For binary output formts, no number implies one value per output.
No terminator characters are expected or written for binary outputs.
.PP
If a
.I \-on
option is given with a positive integer argument, this will be the
maximum number of records that will be written by
.I rsplit.
.PP
A hyphen ('-') by itself can be used to indicate the standard
output, and may appear multiple times.
Results will be unpredictable if the standard output is specified
in this way
and any of the command outputs also writes to their standard output.
At most, one command may reliably write to its standard output.
.PP
The
.I \-ih
option tells
.I rsplit
to expect a Radiance header on its input.
The
.I \-iH
option says to expect a resolution string for an image or similar.
The
.I \-x
and
.I \-y
options may alternatively be used to specify the input dimensions.
The
.I \-oh
option tells
.I rsplit
to produce a Radiance header on the next output stream.
The
.I \-oH
option will write a resolution string.
These options toggle the associated mode on and off,
so it is possible to have one output include a header or
resolution string and not the next by specifying the option(s) again.
Neither
.I \-oh
nor
.I \-oH
may be used with the append mode ('-a'), which may also be toggled.
.SH EXAMPLES
To alternate 5 lines between two output files:
.IP "" .2i
rsplit -oa5 output1.txt output2.txt < input.txt
.PP
To send the first of each double precision triplet to one file, and the second
and third to a second file, stopping after 500 triplets:
.IP "" .2i
rsplit -on 500 -od firstvals.dbl -od2 followingpairs.dbl < triplets.dbl
.PP
To convey material, color and distance information from rtrace to
separate files:
.IP "" .2i
vwrays [viewspec] | rtrace [options] -x 1024 -y 768 -h+ -oMlv octree | rsplit -ih -iH -t^I mats.txt -of depth.zbf -oh -oH -of3 '!pvalue -r -df > image.hdr'
.SH AUTHOR
Greg Ward
.SH "SEE ALSO"
cnt(1), histo(1), neaten(1), rcalc(1), rcode_depth(1),
rcode_ident(1), rcode_norm(1), rlam(1), rtrace(1),
split(1), tabfunc(1), total(1)
Revision:	1.8
Committed:	Thu Nov 7 23:13:12 2019 UTC (5 years, 6 months ago) by greg
Branch:	MAIN
Changes since 1.7:	+7 -2 lines
Log Message:	Made it so a space separator matches all white space
#	User	Rev	Content
1	greg	1.8	.\" RCSid "$Id: rsplit.1,v 1.7 2019/08/22 21:54:46 greg Exp $"
2	greg	1.1	.TH RSPLIT 1 7/8/97 RADIANCE
3			.SH NAME
4			rsplit - splits standard input into multiple output files or streams
5			.SH SYNOPSIS
6			.B rsplit
7			[
8			.B \-tS
9			][
10			.B \-ih
11			][
12			.B \-iH
13			][
14			.B \-oh
15			][
16			.B \-oH
17			][
18	greg	1.3	.B "\-x xres \-y yres"
19			][
20	greg	1.1	.B \-oaN
21			\|
22			.B \-ofN
23			\|
24			.B \-odN
25			\|
26			.B \-ocN
27			\|
28			.B \-oiN
29			\|
30			.B \-owN
31			\|
32			.B \-obN
33			][
34			.B \-f
35			][
36			.B \-a
37			][
38			.B "\-on M"
39			]
40			output1 [options] output2 ..
41			.SH DESCRIPTION
42			.I Rsplit
43			writes lines or fields from the standard input to one or more output
44			streams.
45			By default, fields are separated by a
46	greg	1.3	newline character (i.e., input is distributed by lines),
47			but the terminator can be changed using the
48	greg	1.1	.I \-t
49			option.
50	greg	1.8	If a space is specified as the terminator, then fields are separated by
51			any number of white spaces, including tabs, returns, and newlines.
52	greg	1.3	Different terminators may be given for different fields by specifying
53	greg	1.1	additional
54			.I \-t
55	greg	1.3	options between each output specification.
56	greg	1.8	Note that there is no space between this option and its argument, and
57			certain arguments, such as a space or a tab, must be quoted or escaped
58			with a backslash in most shells.
59			If no argument is given, the default newline terminator is re-established.
60	greg	1.1	.PP
61			An output is either a file or a command.
62			If an output file exists, it will not be overwritten unless the
63			.I \-f
64			option is given, or it is being appended using the
65			.I \-a
66			option.
67			Commands are given in quotes, and begin with an exclamantion point ('!').
68			.PP
69			The
70			.I \-oa
71			option may be used to specify ASCII data (the default), or the
72			.I \-of
73			option may be used to indicated binary IEEE 32-bit floats.
74			Similarly, the
75			.I \-od
76			and
77			.I \-oi
78			options may be used to indicate binary 64-bit doubles or integer words,
79			respectively.
80			The
81			.I \-ow
82			option specifies 2-byte short words, and the
83			.I \-ob
84			option specifies bytes.
85			If a number immediately follows any of these options, then it
86			indicates that multiple such values are expected for each record.
87			For example,
88			.I \-of3
89			indicates three floats per output record for the next named output.
90			In the case of the
91			.I \-oa
92			option, no number writes one line or field per stream, and numbers
93	greg	1.3	greater than zero write multiple fields per record to the same stream.
94			If the terminating character is set to something other than newline ('\\n'),
95			a newline is added after each record (in addition to the terminator).
96	greg	1.1	For binary output formts, no number implies one value per output.
97	greg	1.7	No terminator characters are expected or written for binary outputs.
98	greg	1.1	.PP
99			If a
100			.I \-on
101			option is given with a positive integer argument, this will be the
102			maximum number of records that will be written by
103			.I rsplit.
104			.PP
105			A hyphen ('-') by itself can be used to indicate the standard
106			output, and may appear multiple times.
107			Results will be unpredictable if the standard output is specified
108			in this way
109			and any of the command outputs also writes to their standard output.
110			At most, one command may reliably write to its standard output.
111			.PP
112			The
113			.I \-ih
114			option tells
115			.I rsplit
116			to expect a Radiance header on its input.
117			The
118			.I \-iH
119			option says to expect a resolution string for an image or similar.
120			The
121			.I \-x
122			and
123			.I \-y
124			options may alternatively be used to specify the input dimensions.
125			The
126			.I \-oh
127			option tells
128			.I rsplit
129			to produce a Radiance header on the next output stream.
130			The
131			.I \-oH
132			option will write a resolution string.
133			These options toggle the associated mode on and off,
134			so it is possible to have one output include a header or
135			resolution string and not the next by specifying the option(s) again.
136			Neither
137			.I \-oh
138			nor
139			.I \-oH
140	greg	1.6	may be used with the append mode ('-a'), which may also be toggled.
141	greg	1.5	.SH EXAMPLES
142	greg	1.1	To alternate 5 lines between two output files:
143			.IP "" .2i
144	greg	1.2	rsplit -oa5 output1.txt output2.txt < input.txt
145	greg	1.1	.PP
146			To send the first of each double precision triplet to one file, and the second
147			and third to a second file, stopping after 500 triplets:
148			.IP "" .2i
149	greg	1.2	rsplit -on 500 -od firstvals.dbl -od2 followingpairs.dbl < triplets.dbl
150	greg	1.1	.PP
151			To convey material, color and distance information from rtrace to
152			separate files:
153			.IP "" .2i
154			vwrays [viewspec] \| rtrace [options] -x 1024 -y 768 -h+ -oMlv octree \| rsplit -ih -iH -t^I mats.txt -of depth.zbf -oh -oH -of3 '!pvalue -r -df > image.hdr'
155			.SH AUTHOR
156			Greg Ward
157			.SH "SEE ALSO"
158	greg	1.6	cnt(1), histo(1), neaten(1), rcalc(1), rcode_depth(1),
159			rcode_ident(1), rcode_norm(1), rlam(1), rtrace(1),
160	greg	1.1	split(1), tabfunc(1), total(1)