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Full Discussion: C: CSV implementation
Top Forums Programming C: CSV implementation Post 302925076 by totoro125 on Thursday 13th of November 2014 08:51:51 PM
Old 11-13-2014
Quote:
Originally Posted by junior-helper
I'm no C programmer, but I think I know some basics Smilie

First of all, you'll need to compile this code, try
Code:
gcc csvgetline.c  #produces executable file a.out

or
Code:
gcc -o csvgetline csvgetline.c  #produces executable file csvgetline

#invoke executable to read from standard input
Code:
./a.out OR ./csvgetline

Example:
Code:
$ ./a.out
"LU",86.25,"11/4/1998","2:19PM",+4.0625,"abc"
field[0] = `LU'
field[1] = `86.25'
field[2] = `11/4/1998'
field[3] = `2:19PM'
field[4] = `+4.0625'
field[5] = `abc'
^C
$

#invoke executable to read from a file
Code:
./a.out file.csv OR ./csvgetline file.csv

Example:
Code:
$ ./a.out file.csv
field[0] = `LU'
field[1] = `86.25'
field[2] = `11/4/1998'
field[3] = `2:19PM'
field[4] = `+4.0625'
field[5] = `abc'
$

Not sure, but I'd say it's
1. the processing of pre-defined number of fields (?) even if the actual number of fields exceeds that limit and thus producing wrong output
I don't know why, but during some testing I found out it will handle 24 fields, but fail when there are >25 fields.
2. the processing of pre-defined line length even if the actual line length exceeds that limit and thus producing wrong output
which I'd summarize as "no error checking".

Demo for "too many fields":
Code:
$ ./a.out test.csv #file with 26 fields; A,B,C,D,...
field[0] = `РҠE'
field[1] = `ҠE'
field[2] = `ҠE'
field[3] = `E'
field[4] = `E'
field[5] = `F'
field[6] = `G'
field[7] = `H'
field[8] = `I'
field[9] = `J'
field[10] = `K'
field[11] = `L'
field[12] = `M'
field[13] = `N'
field[14] = `O'
field[15] = `P'
field[16] = `Q'
field[17] = `R'
field[18] = `S'
field[19] = `T'
field[20] = `U'
field[21] = `V'
field[22] = `W'
field[23] = `X'
field[24] = `Y'
field[25] = `Z'
$

Demo for "too long line":
Code:
$ ./a.out file.csv #file with 8 fields (8 x A..Z), line length 216 characters 
field[0] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[1] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[2] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[3] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[4] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[5] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[6] = `ABCDEFGHIJKLMNOPQRSTUVWXYZ'
field[7] = `ABCDEFGHIJ'  # note this "cut" at exactly 200th character
field[0] = `KLMNOPQRSTUVWXYZ'
$

Thank you! You have been such a great help to me lately ^^
 

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