Re: [MLUG] String manipulation in C

[Stephen Montgomery-Smith <EMAIL:PROTECTED>]

On Sun, 1 Jul 2007, Mark Rages wrote:

> On 7/1/07, Jack Smith <EMAIL:PROTECTED> wrote:
> > The matches will need to be put in a MATLAB data frame first and then a
> > MySQL database later. Outputting data in columns would work as I could
> > read the columns in later to make the data frame.
> >
> > I know that grep will find the expression as many times as it appears in
> > the string searched. But I need it to find how many characters the start
> > of the match is from the start of the string. The best that I see can
> > come from grep is number of letters that the first character in the line
> > the match is in is from the start (the byte offset.) But I need the
> > actual distance from start -> match.
> >
> >
> > Jack
>
> OK, if you wanna try C:
>
> #include <string.h>
>
> void print_offset_matches(char *needle, char *haystack) {
> char *begin=haystack;
>
> while (haystack=strstr(haystack,needle))
>   printf("%d\n",haystack-begin);
> }

Or it might need to be

  while (haystack=strstr(haystack,needle)) {
    printf("%d\n",haystack-begin);
    haystack++;
  }
}

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