--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/objgrep/grep.c	Fri Jul 04 00:54:33 2014 +0000
@@ -0,0 +1,35 @@
+/*
+ * objgrep: the actual grep operation
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include "globals.h"
+
+do_grep()
+{
+	uint32_t *match, *mask, *haystack;
+	unsigned matchlen_words, haystack_len_words, haystack_limit;
+	unsigned i, j;
+
+	match = (uint32_t *)pattern_match;
+	mask = (uint32_t *)pattern_mask;
+	haystack = (uint32_t *)binfilemap;
+	matchlen_words = pattern_len >> 2;
+	haystack_len_words = binfile_tot_size >> 2;
+	haystack_limit = haystack_len_words - matchlen_words;
+	for (i = 0; i <= haystack_limit; i++) {
+		for (j = 0; j < matchlen_words; j++)
+			if ((haystack[i+j] & mask[j]) != match[j])
+				goto haystack_next;
+		/* got a match! */
+		match_offset = i << 2;
+		return(1);
+haystack_next:	continue;
+	}
+	return(0);
+}