Blank Line from File Input

[garishnikov]

Hi

Could anyone tell me how to test for a blank line. I have the following but it obviously doesnt work:

if(*rawLine != NULL)
{
/* do stuff */
}

where i have the declaration:

char *rawLine;

which points to a string.

I simply want to ignore blank lines.

 

[ArkM]

What is it a blank line (C-string)? If it's zero length string, test:

if (!rawLine || !*rawLine)
/* then it's null pointer or empty string */

If a blank line is a line with blanks or tabs only (or empty string), test:

if (!rawLine || !*rawLine 
|| strspn(rawLine," \t") == strlen(rawLine))
/* then it's null ptr, empty string or line with whitespaces */

ANSI/ISO Std RTL strspn() functions lives in <string.h>...

 

[Cagliostro]

for(i = 0, rawLine, i++)
{
if(isspace(rawLine)return line is not blank...
}
return line is blank...

Ion Filipski

 

[Cagliostro]

again:
for(i = 0, rawLine, i++)
{
if(!isspace(rawLine)return line is not blank...
}
return line is blank...


Ion Filipski