12-08-2009
Quote:
Ascii characters are made up from one 8 bit byte. So a "|" (pipe symbol) is represented by a value of 179 decimal, or b3 hexadecimal.
What you have in your original string is 16 8-bit bytes. If you take these in pairs and multiply the first by 16 and add the second, you will end up with a value between 0 and 255, (b *16 +3 = 11 * 16 +3 = 179), which you can then store in a single 8 bit byte, resulting in a 50% reduction in storage.
thank you for your answer! so you suggest that i do that in a for(){} condition and that i write every byte that in each repetition occurs into the file?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a record in a file that ends with the new line character "\n". How dio I determine the hexadecimal value for that? (2 Replies)
Discussion started by: lesstjm
2 Replies
2. UNIX for Dummies Questions & Answers
Hi all,
I have a small script to convert my HexaDecimal Input to Decimal as output.
#!/bin/ksh
hd=00208060
dec=`printf %d $hd`
echo $dec
Output of the above program:
printf: 00208060 not completely converted
16
But my expected output is "2130016".
How can i acheive this.
I... (2 Replies)
Discussion started by: Arunprasad
2 Replies
3. Shell Programming and Scripting
Hi gurus,
I have a file in unix with ascii values. I need to convert all the ascii values in the file to ascii characters. File contains nearly 20000 records with ascii values. (10 Replies)
Discussion started by: sandeeppvk
10 Replies
4. Shell Programming and Scripting
printf "%X\n" "A"
41
printf "%X\n" "2"
2
Expected 32 (not 2).
Is there a "printf" which will output the hexadecimal value of a numeric character? (9 Replies)
Discussion started by: methyl
9 Replies
5. Shell Programming and Scripting
hi all,
this is my script:
#! /bin/sh
minutes=$( { i2cget -f -y 0 0x51 3; } 2>&1 )
minutes=${minutes:2}
hour=$( { i2cget -f -y 0 0x51 4; } 2>&1 )
hour=${hour:2}
day=$( { i2cget -f -y 0 0x51 5; } 2>&1 )
day=${day:2}
month=$( { i2cget -f -y 0 0x51 7; } 2>&1 )
month=${month:2}
... (6 Replies)
Discussion started by: enaud
6 Replies
6. Shell Programming and Scripting
Hi Guys,
Is it possible to convert the hexadecimal to Binary by unix command.....I could not figure out....
If I need to convert AF6D to binary...what could be the way to do?
Thanks in advance!!
---------- Post updated at 02:57 AM ---------- Previous update was at 02:42 AM ----------
I... (6 Replies)
Discussion started by: Indra2011
6 Replies
7. Shell Programming and Scripting
How can I convert hexadecimal values to Binary from the second field to the end
Input:
WS-2 23 345 235
DT-3 45 4A3 000
pp-2 76 300 E4
Output:
WS-2 100011 1101000101 1000110101
DT-3 1000101 10010100011 000
pp-2 1110110 1100000000 11100100 (16 Replies)
Discussion started by: aydj
16 Replies
8. Programming
Dear all,
I am trying to write c-program to read the following file containing hexadecimal values (snippet of big data file).
I want to combine two hexadecimal values together like A0A03E01 and then would like to have the binary equivalent to perform further test on it. Unfortunately, it failed... (16 Replies)
Discussion started by: emily
16 Replies
9. Shell Programming and Scripting
Hi All,
I have an ascii file in which few columns are having hex values which i need to convert into ascii. Kindly suggest me what command can be used in unix shell scripting?
Thanks in Advance (2 Replies)
Discussion started by: HemaV
2 Replies
10. Shell Programming and Scripting
Hello
I'm working on a script to list all ipv6 from given address
so I've run this script which create hex part of ipv6
STR2=159
END2=200
SUM2=`expr $END2 - $STR2`
for ((i=STR2;i<=END2;++i)); do
x=$( printf "%x" $i ) ; echo $x
echo -e "::"$x >> netpart.txt
done
output is :
::9f... (2 Replies)
Discussion started by: nimafire
2 Replies
ascii(5) Standards, Environments, and Macros ascii(5)
NAME
ascii - map of ASCII character set
SYNOPSIS
cat /usr/pub/ascii
DESCRIPTION
/usr/pub/ascii is a map of the ASCII character set, to be printed as needed. It contains octal and hexadecimal values for each character.
While not included in that file, a chart of decimal values is also shown here.
Octal - Character
000 NUL 001 SOH 002 STX 003 ETX 004 EOT 005 ENQ 006 ACK 007 BEL
010 BS 011 HT 012 NL 013 VT 014 NP 015 CR 016 SO 017 SI
020 DLE 021 DC1 022 DC2 023 DC3 024 DC4 025 NAK 026 SYN 027 ETB
030 CAN 031 EM 032 SUB 033 ESC 034 FS 035 GS 036 RS 037 US
040 SP 041 ! 042 " 043 # 044 $ 045 % 046 & 047 '
050 ( 051 ) 052 * 053 + 054 , 055 - 056 . 057 /
060 0 061 1 062 2 063 3 064 4 065 5 066 6 067 7
070 8 071 9 072 : 073 ; 074 < 075 = 076 > 077 ?
100 @ 101 A 102 B 103 C 104 D 105 E 106 F 107 G
110 H 111 I 112 J 113 K 114 L 115 M 116 N 117 O
120 P 121 Q 122 R 123 S 124 T 125 U 126 V 127 W
130 X 131 Y 132 Z 133 [ 134 135 ] 136 ^ 137 _
140 ` 141 a 142 b 143 c 144 d 145 e 146 f 147 g
150 h 151 i 152 j 153 k 154 l 155 m 156 n 157 o
160 p 161 q 162 r 163 s 164 t 165 u 166 v 167 w
170 x 171 y 172 z 173 { 174 | 175 } 176 ~ 177 DEL
Hexadecimal - Character
00 NUL 01 SOH 02 STX 03 ETX 04 EOT 05 ENQ 06 ACK 07 BEL
08 BS 09 HT 0A NL 0B VT 0C NP 0D CR 0E SO 0F SI
10 DLE 11 DC1 12 DC2 13 DC3 14 DC4 15 NAK 16 SYN 17 ETB
18 CAN 19 EM 1A SUB 1B ESC 1C FS 1D GS 1E RS 1F US
20 SP 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
28 ( 29 ) 2A * 2B + 2C , 2D - 2E . 2F /
30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
38 8 39 9 3A : 3B ; 3C < 3D = 3E > 3F ?
40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
48 H 49 I 4A J 4B K 4C L 4D M 4E N 4F O
50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
58 X 59 Y 5A Z 5B [ 5C 5D ] 5E ^ 5F _
60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
68 h 69 i 6A j 6B k 6C l 6D m 6E n 6F o
70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
78 x 79 y 7A z 7B { 7C | 7D } 7E ~ 7F DEL
Decimal - Character
0 NUL 1 SOH 2 STX 3 ETX 4 EOT 5 ENQ 6 ACK 7 BEL
8 BS 9 HT 10 NL 11 VT 12 NP 13 CR 14 SO 15 SI
16 DLE 17 DC1 18 DC2 19 DC3 20 DC4 21 NAK 22 SYN 23 ETB
24 CAN 25 EM 26 SUB 27 ESC 28 FS 29 GS 30 RS 31 US
32 SP 33 ! 34 " 35 # 36 $ 37 % 38 & 39 '
40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 /
48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7
56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ?
64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G
72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O
80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W
88 X 89 Y 90 Z 91 [ 92 93 ] 94 ^ 95 _
96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g
104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o
112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w
120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 DEL
FILES
/usr/pub/ascii On-line chart of octal and hexadecimal values for the ASCII character set.
SunOS 5.10 19 Apr 2002 ascii(5)