Sponsored Content
Top Forums Programming Accessing substrings by offset and length Post 30144 by Vishnu on Thursday 17th of October 2002 10:07:01 AM
Old 10-17-2002
That was great Perderabo... and I learnt a lesson too! I certainly need to put more thought before taking for granted utility of certain standard C functions.. I have seen the strncpy(), but thought I'm restricted to access only from the beginning always...
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

creating a fixed length output from a variable length input

Is there a command that sets a variable length? I have a input of a variable length field but my output for that field needs to be set to 32 char. Is there such a command? I am on a sun box running ksh Thanks (2 Replies)
Discussion started by: r1500
2 Replies

2. UNIX for Dummies Questions & Answers

Sed working on lines of small length and not large length

Hi , I have a peculiar case, where my sed command is working on a file which contains lines of small length. sed "s/XYZ:1/XYZ:3/g" abc.txt > xyz.txt when abc.txt contains lines of small length(currently around 80 chars) , this sed command is working fine. when abc.txt contains lines of... (3 Replies)
Discussion started by: thanuman
3 Replies

3. UNIX for Dummies Questions & Answers

What the command to find out the record length of a fixed length file?

I want to find out the record length of a fixed length file? I forgot the command. Any body know? (9 Replies)
Discussion started by: tranq01
9 Replies

4. Shell Programming and Scripting

extracting substrings

Hi guys, I am stuck in this problem. Please help. I have two files. FILE1 (with records starting from '>' ) >TC1723_3 similar to Scific_A7Q9Q3 EMSPSQDYCDDYFKLTYPCTAGAQYYGRGALPVYWNYNYGAIGEALKLDLLNHPEYIEQN ATMAFQAAIWRWMNPMKKGQPSAHDAFVGNWKP >TC214_2 similar to Quiet_Ref100_Q8W2B2 Cluster;... (1 Reply)
Discussion started by: smriti_shridhar
1 Replies

5. Shell Programming and Scripting

Moving bytes in file by offset and length

Hi, I'm looking for a way (other than C) to pull out a number of bytes in a Linux file for a giving length. for example: file1 contains 2 records: abcdefghijkl mnopqrstuv ..... so, I want to pull starting in byte 9 for a length of 8 file2 would contain: ijkmnopq Thanks (2 Replies)
Discussion started by: jbt828
2 Replies

6. Shell Programming and Scripting

Flat file-make field length equal to header length

Hello Everyone, I am stuck with one issue while working on abstract flat file which i have to use as input and load data to table. Input Data- ------ ------------------------ ---- ----------------- WFI001 Xxxxxx Control Work Item A Number of Records ------ ------------------------... (5 Replies)
Discussion started by: sonali.s.more
5 Replies

7. Shell Programming and Scripting

Extracting substrings from a string of variable length

I have a string like Months=jan feb mar april x y .. Here the number of fields in Months is not definite I need to extract each field in the Months string and pass it to awk . Don't want to use for in since it is a loop . How can i do it (2 Replies)
Discussion started by: Nevergivup
2 Replies

8. UNIX for Advanced & Expert Users

Grep --byte-offset not returning the offset (Grep version 2.5.1)

Hi, I am trying to get the position of a repeated string in a line using grep -b -o "pattern" In my server I am using GNU grep version 2.14 and the code is working fine. However when I am deploying the same code in a different server which is using GNU grep version 2.5.1 the code is not... (3 Replies)
Discussion started by: Subhamoy
3 Replies

9. Shell Programming and Scripting

Look for substrings with special characters

Hello gurus, I have a lookup table cat tmp1 \\\erw``~ 1 ^774574574565665f\] 2 ()42543^ and I`m trying to compare a bunch of strings such that, either the lookup table column 1, or the string to be looked up are substrings of each other (and return the second lookup column if yes). ... (2 Replies)
Discussion started by: sheetalk
2 Replies
ICONV_SUBSTR(3) 							 1							   ICONV_SUBSTR(3)

iconv_substr - Cut out part of a string

SYNOPSIS
string iconv_substr (string $str, int $offset, [int $length = iconv_strlen($str, $charset)], [string $charset = ini_get("iconv.inter- nal_encoding")]) DESCRIPTION
Cuts a portion of $str specified by the $offset and $length parameters. PARAMETERS
o $str - The original string. o $offset - If $offset is non-negative, iconv_substr(3) cuts the portion out of $str beginning at $offset'th character, counting from zero. If $offset is negative, iconv_substr(3) cuts out the portion beginning at the position, $offset characters away from the end of $str. o $length - If $length is given and is positive, the return value will contain at most $length characters of the portion that begins at $offset (depending on the length of $string). If negative $length is passed, iconv_substr(3) cuts the portion out of $str from the $offset'th character up to the character that is $length characters away from the end of the string. In case $offset is also negative, the start position is calculated beforehand according to the rule explained above. o $charset - If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding. Note that $offset and $length parameters are always deemed to represent offsets that are calculated on the basis of the character set determined by $charset, whilst the counterpart substr(3) always takes these for byte offsets. RETURN VALUES
Returns the portion of $str specified by the $offset and $length parameters. If $str is shorter than $offset characters long, FALSE will be returned. SEE ALSO
substr(3), mb_substr(3), mb_strcut(3). PHP Documentation Group ICONV_SUBSTR(3)
All times are GMT -4. The time now is 05:01 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy