man/man1/rsplit.1

.\" RCSid "$Id: rsplit.1,v 1.10 2020/04/05 02:25:22 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
Output is either to a file, to a command, to the standard output, or to discard.
If a named 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.
The same output file may not appear more than once.
Commands are given in quotes, and begin with an exclamantion point ('!').
At most, one command may reliably write to its standard output, and
doing so is incompatible with
.I rsplit
also writing to standard output.
A hyphen ('-') by itself tells
.I rsplit
to write directly to its standard output, and may appear multiple times.
The options before the first appearance determine the
standard output header parameters.
A period ('.') tells
.I rsplit
to discard the corresponding data, and also may appear multiple times.
.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
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), rcode2bmp(1),
rlam(1), rtpict(1), rtrace(1), split(1), tabfunc(1), total(1)
Revision:	1.11
Committed:	Sun Apr 5 15:07:09 2020 UTC (5 years, 1 month ago) by greg
Branch:	MAIN
CVS Tags:	rad5R3
Changes since 1.10:	+16 -15 lines
Log Message:	Added check for duplicate output file(s)
#	Content
1	.\" RCSid "$Id: rsplit.1,v 1.10 2020/04/05 02:25:22 greg Exp $"
2	.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	.B "\-x xres \-y yres"
19	][
20	.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	newline character (i.e., input is distributed by lines),
47	but the terminator can be changed using the
48	.I \-t
49	option.
50	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	Different terminators may be given for different fields by specifying
53	additional
54	.I \-t
55	options between each output specification.
56	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	.PP
61	Output is either to a file, to a command, to the standard output, or to discard.
62	If a named 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	The same output file may not appear more than once.
68	Commands are given in quotes, and begin with an exclamantion point ('!').
69	At most, one command may reliably write to its standard output, and
70	doing so is incompatible with
71	.I rsplit
72	also writing to standard output.
73	A hyphen ('-') by itself tells
74	.I rsplit
75	to write directly to its standard output, and may appear multiple times.
76	The options before the first appearance determine the
77	standard output header parameters.
78	A period ('.') tells
79	.I rsplit
80	to discard the corresponding data, and also may appear multiple times.
81	.PP
82	The
83	.I \-oa
84	option may be used to specify ASCII data (the default), or the
85	.I \-of
86	option may be used to indicated binary IEEE 32-bit floats.
87	Similarly, the
88	.I \-od
89	and
90	.I \-oi
91	options may be used to indicate binary 64-bit doubles or integer words,
92	respectively.
93	The
94	.I \-ow
95	option specifies 2-byte short words, and the
96	.I \-ob
97	option specifies bytes.
98	If a number immediately follows any of these options, then it
99	indicates that multiple such values are expected for each record.
100	For example,
101	.I \-of3
102	indicates three floats per output record for the next named output.
103	In the case of the
104	.I \-oa
105	option, no number writes one line or field per stream, and numbers
106	greater than zero write multiple fields per record to the same stream.
107	If the terminating character is set to something other than newline ('\\n'),
108	a newline is added after each record (in addition to the terminator).
109	For binary output formts, no number implies one value per output.
110	No terminator characters are expected or written for binary outputs.
111	.PP
112	If a
113	.I \-on
114	option is given with a positive integer argument, this will be the
115	maximum number of records that will be written by
116	.I rsplit.
117	.PP
118	The
119	.I \-ih
120	option tells
121	.I rsplit
122	to expect a Radiance header on its input.
123	The
124	.I \-iH
125	option says to expect a resolution string for an image or similar.
126	The
127	.I \-x
128	and
129	.I \-y
130	options may alternatively be used to specify the input dimensions.
131	The
132	.I \-oh
133	option tells
134	.I rsplit
135	to produce a Radiance header on the next output stream.
136	The
137	.I \-oH
138	option will write a resolution string.
139	These options toggle the associated mode on and off,
140	so it is possible to have one output include a header or
141	resolution string and not the next by specifying the option(s) again.
142	Neither
143	.I \-oh
144	nor
145	.I \-oH
146	may be used with the append mode ('-a'), which may also be toggled.
147	.SH EXAMPLES
148	To alternate 5 lines between two output files:
149	.IP "" .2i
150	rsplit -oa5 output1.txt output2.txt < input.txt
151	.PP
152	To send the first of each double precision triplet to one file, and the second
153	and third to a second file, stopping after 500 triplets:
154	.IP "" .2i
155	rsplit -on 500 -od firstvals.dbl -od2 followingpairs.dbl < triplets.dbl
156	.PP
157	To convey material, color and distance information from rtrace to
158	separate files:
159	.IP "" .2i
160	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'
161	.SH AUTHOR
162	Greg Ward
163	.SH "SEE ALSO"
164	cnt(1), histo(1), neaten(1), rcalc(1), rcode_depth(1),
165	rcode_ident(1), rcode_norm(1), rcode2bmp(1),
166	rlam(1), rtpict(1), rtrace(1), split(1), tabfunc(1), total(1)