April 01, 1999
Regular Expressions
/* grep: search for re in file */
int grep(char *re, FILE *f, char *name)
{
int n, nmatch;
char buf[BUFSIZ];
nmatch = 0;
while (fgets(buf, sizeof buf, f) != NULL) {
n = strlen(buf);
if (n > 0 && buf[n-1] == '\n')
buf[n-1] = '\0';
if (match(re, buf)) {
nmatch++;
if (name != NULL)
printf("%s:", name);
printf("%s\n", buf);
}
}
return nmatch;
}
Example 5: The function grep scans a single file, calling match on each line.
Copyright © 1999, Dr. Dobb's Journal 
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