maxrjones
/
gmt-fork
mirror of https://github.com/meghanrjones/gmt.git


  
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

	
            #!/usr/bin/env bash
#

# test byteswapping 32 bit integers

# generate random binary file
BYTES=$((1024*1024)) # 1 MiB
head -c $BYTES /dev/urandom > data.b

# swap
gmt convert -bi1I -bo1Iw data.b | gmt convert -bi1Iw -bo1I > out.u
gmt convert -bi1i -bo1iw data.b | gmt convert -bi1iw -bo1i > out.d

# compare result
diff -q data.b out.u
diff -q data.b out.d

# swap using gmt xyz2grd
gmt xyz2grd -Sswapped_tmp.b -ZI data.b
gmt xyz2grd -Sswapped.b -ZI swapped_tmp.b

# compare result
diff -q data.b swapped.b

# files must differ
if diff -q swapped_tmp.b swapped.b; then
  false # return with error
fi