[MINOR] tools: add a "word_match()" function to match words and ignore spaces
Some header values might be delimited with spaces, so it's not enough to
compare "close" or "keep-alive" with strncasecmp(). Use word_match() for
that.
diff --git a/src/standard.c b/src/standard.c
index 81cdda4..f841c6d 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -1,7 +1,7 @@
/*
* General purpose functions.
*
- * Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
+ * Copyright 2000-2010 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -813,6 +813,35 @@
return key;
}
+/* This function compares a sample word possibly followed by blanks to another
+ * clean word. The compare is case-insensitive. 1 is returned if both are equal,
+ * otherwise zero. This intends to be used when checking HTTP headers for some
+ * values. Note that it validates a word followed only by blanks but does not
+ * validate a word followed by blanks then other chars.
+ */
+int word_match(const char *sample, int slen, const char *word, int wlen)
+{
+ if (slen < wlen)
+ return 0;
+
+ while (wlen) {
+ char c = *sample ^ *word;
+ if (c && c != ('A' ^ 'a'))
+ return 0;
+ sample++;
+ word++;
+ slen--;
+ wlen--;
+ }
+
+ while (slen) {
+ if (*sample != ' ' && *sample != '\t')
+ return 0;
+ sample++;
+ slen--;
+ }
+ return 1;
+}
/*
* Local variables: