Text file parsing in C

Question

5.00/5 (1 vote)

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Hi,

I need to parse a CSV file[^].
My file data is in below format,
NRTIT15;15/05/2005;
NRTIT16;16/06/2005;
OZ9520;03/09/2004;

I need to check the blank lines in the file at EOF.
If my file contains line feed at the end, i want to print the error mesasge.
For each line i am using \n. but i want to check for new lines at the EOF.
My parse function is,

C++

int SRR_parseLine(char * pLine,
                  int  * pLenName,
                  int  * pPosValue,
                  int  * pLenValue)
{
  int  i                              = 0;  
 
  while (pLine[i] && pLine[i] != ' ' && pLine[i] != '\t' &&
         pLine[i] != ';' && pLine[i] != '#')
  {    i++;  }
  if (i == 0)
  {
    return 0;
  }
  *pLenName = i;
  while (pLine[i] && (pLine[i] == ' ' || pLine[i] == '\t'))
  {    i++;  }
  if (pLine[i++] != ';')
  {
   return 0;
  }
  while (pLine[i] && (pLine[i] == ' ' || pLine[i] == '\t'))
  {    i++;  }
  *pPosValue = i++;
  while (pLine[i] && pLine[i] != '\n'&& pLine[i] != '"')
  {    i++;  }
  *pLenValue = i - *pPosValue;
  return 1;
}

How can I check the space/tab/CR/LF in my file?

thanks in advance.

EDIT: This is the 21th question and you still waiting for other editors to format your source code. Please play nice.

Posted 2-Jun-10 18:15pm

Poonamol

Updated 2-Jun-10 22:48pm

Moak

v8

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Comments

Sandeep Mewara 3-Jun-10 1:19am

Pre tags are your friend for formatting the code part, use it next time!

2 solutions

Solution 2

Thank you so much for the reply.
I know the data limit for each line.
So if strlen(pLine) is less than limit or greater than limit then I am printing error.
It works fine for me. :-O

Posted 3-Jun-10 2:07am

Poonamol

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CPallini · Accepted Answer · 2010-06-02T22:08:00

You should check the end of line condition in every loop, for instance:

Poonamol wrote:
while (pLine[i] && pLine[i] != ' ' && pLine[i] != '\t' &&
pLine[i] != ';' && pLine[i] != '#')
{ i++; }

would become

C#

while (pLine[i] && pLine[i] != ' ' && pLine[i] != '\t' &&
         pLine[i] != ';' && pLine[i] != '#')
  {
    if ( pLine[i] == '\n') return 0;
    i++;  
  }

:)