--- Makefile.in	Mon Apr 29 05:14:11 2002
+++ Makefile.in	Fri May  3 14:48:08 2002
@@ -11,7 +11,7 @@
 CFLAGS=@CFLAGS@ -I.
 
-OBJS= ccache.o mdfour.o hash.o execute.o util.o args.o stats.o \
+OBJS= ccache.o hash.o execute.o util.o args.o stats.o \
 	cleanup.o snprintf.o unify.o
-HEADERS = ccache.h mdfour.h
+HEADERS = ccache.h
 
 all: ccache
@@ -20,5 +20,5 @@
 
 ccache: $(OBJS) $(HEADERS)
-	$(CC) $(CFLAGS) -o $@ $(OBJS)
+	$(CC) $(CFLAGS) -o $@ $(OBJS) -lmd
 
 ccache.1: ccache.yo
--- ccache.h	Mon Apr 29 05:14:12 2002
+++ ccache.h	Fri May  3 14:47:05 2002
@@ -57,5 +57,5 @@
 typedef unsigned uint32;
 
-#include "mdfour.h"
+#include <md4.h>
 
 void hash_start(void);
@@ -64,5 +64,5 @@
 void hash_file(const char *fname);
 char *hash_result(void);
-void hash_buffer(const char *s, int len);
+void hash_buffer(const unsigned char *s, unsigned int len);
 
 void cc_log(const char *format, ...);
--- hash.c	Mon Apr 29 05:14:12 2002
+++ hash.c	Fri May  3 15:18:08 2002
@@ -21,15 +21,20 @@
 
 #include "ccache.h"
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
 
-static struct mdfour md;
+static MD4_CTX md;
+static off_t	totalN;
 
-void hash_buffer(const char *s, int len)
+void hash_buffer(const unsigned char *s, unsigned int len)
 {
-	mdfour_update(&md, (unsigned char *)s, len);
+	totalN += len;
+	MD4Update(&md, s, len);
 }
 
 void hash_start(void)
 {
-	mdfour_begin(&md);
+	MD4Init(&md);
 }
 
@@ -47,16 +52,27 @@
 void hash_file(const char *fname)
 {
-	char buf[1024];
-	int fd, n;
+	char *buf;
+	int fd;
+	struct stat stats;
 
 	fd = open(fname, O_RDONLY);
 	if (fd == -1) {
 		cc_log("Failed to open %s\n", fname);
-		fatal("hash_file");
+		fatal(__FUNCTION__);
 	}
-
-	while ((n = read(fd, buf, sizeof(buf))) > 0) {
-		hash_buffer(buf, n);
+	if (fstat(fd, &stats) != 0) {
+		cc_log("Failed to fstat the opened %s (descriptor %d)\n",
+			fname, fd);
+		close(fd);
+		fatal(__FUNCTION__);
+	}
+	buf = mmap(NULL, stats.st_size, PROT_READ, MAP_PRIVATE, fd, 0); 
+	if (buf == MAP_FAILED) {
+		cc_log("Failed to mmap %s\n", fname);
+		close(fd);
+		fatal(__FUNCTION__);
 	}
+
+	hash_buffer(buf, stats.st_size);
 	close(fd);
 }
@@ -65,15 +81,9 @@
 char *hash_result(void)
 {
-	unsigned char sum[16];
 	static char ret[53];
-	int i;
 
-	hash_buffer(NULL, 0);
-	mdfour_result(&md, sum);
+	MD4End(&md, ret);
 	
-	for (i=0;i<16;i++) {
-		sprintf(&ret[i*2], "%02x", (unsigned)sum[i]);
-	}
-	sprintf(&ret[i*2], "-%u", (unsigned)md.totalN);
+	snprintf(ret + 32, sizeof ret - 32, "-%lu", (unsigned long)totalN);
 
 	return ret;
--- unify.c	Sun Mar 31 23:00:31 2002
+++ unify.c	Fri May  3 15:53:13 2002
@@ -105,11 +105,10 @@
 			len = 0;
 		}
-		hash_buffer(NULL, 0);
 		return;
 	}
 
 	buf[len++] = c;
-	if (len == 64) {
-		hash_buffer((char *)buf, len);
+	if (len == sizeof buf) {
+		hash_buffer((char *)buf, sizeof buf);
 		len = 0;
 	}