X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/9343e9338ddf1015a63a95e4e78bfe659a557b76..114f6096b4d2c31314a7d4030f67aaeb1f0f8787:/lib/minilib.c

diff --git a/lib/minilib.c b/lib/minilib.c
index 664a0b4..935d0c4 100644
--- a/lib/minilib.c
+++ b/lib/minilib.c
@@ -1,12 +1,70 @@
+/* minilib.c
+ * General-purpose C library routines.
+ * NetWatch system management mode administration console
+ *
+ * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
+ * This program is free software; you can redistribute and/or modify it under
+ * the terms found in the file LICENSE in the root of this source tree.
+ *
+ */
+
 #include "console.h"
 #include <minilib.h>
+#include <output.h>
 
-void memcpy(void *dest, const void *src, int bytes)
+
+/* We have both _memcpy and memcpy, because gcc might be able to do better in lwip.
+ * For small things, gcc inlines its memcpy, but for large things, we call out
+ * to this memcpy.
+ */
+void _memcpy(void *dest, const void *src, int bytes)
 {
+	/* I hate everyone */
+	/* Since we otherwise compile with -O0, we might as well manually speed this up a bit. */
+	
 	char *cdest = dest;
 	const char *csrc = src;
-	while (bytes--)
+	int *idest;
+	const int *isrc;
+	int nwords;
+	
+	/* Align to src (picked arbitrarily; might as well align to something) */
+	while (bytes && ((unsigned int)csrc & 3))
+	{
+		*(cdest++) = *(csrc++);
+		bytes--;
+	}
+	
+	idest = (int *)cdest;
+	isrc = (const int *)csrc;
+	
+	nwords = bytes / 4;
+	bytes -= bytes & ~3;
+	if (nwords != 0)
+		switch(nwords % 8)	/* They see me Duff'sin'.  They hatin'. */
+			do {
+		case  0:	nwords--; *(idest++) = *(isrc++);
+		case  7:	nwords--; *(idest++) = *(isrc++);
+		case  6:	nwords--; *(idest++) = *(isrc++);
+		case  5:	nwords--; *(idest++) = *(isrc++);
+		case  4:	nwords--; *(idest++) = *(isrc++);
+		case  3:	nwords--; *(idest++) = *(isrc++);
+		case  2:	nwords--; *(idest++) = *(isrc++);
+		case  1:	nwords--; *(idest++) = *(isrc++);
+			} while (nwords);
+	
+	cdest = (char *)idest;
+	csrc = (const char *)isrc;
+	while (bytes)	/* Clean up the remainder */
+	{
 		*(cdest++) = *(csrc++);
+		bytes--;
+	}
+}
+
+void memcpy(void *dest, const void *src, int bytes)
+{
+	_memcpy(dest, src, bytes);
 }
 
 void memset(void *dest, int data, int bytes)
@@ -16,6 +74,17 @@ void memset(void *dest, int data, int bytes)
 		*(cdest++) = (unsigned char)data;
 }
 
+void *memchr(const void *buf, char c, int maxlen)
+{
+	const char * cbuf = buf;
+	while (maxlen--)
+	{
+		if (*cbuf == c) return (void *)cbuf;
+		cbuf++;
+	}
+	return 0;
+}
+
 void memmove(void *dest, void *src, int bytes)
 {
 	char * cdest = dest;
@@ -28,8 +97,7 @@ void memmove(void *dest, void *src, int bytes)
 		while (bytes--)
 			*(--cdest) = *(--csrc);
 	} else
-		while (bytes--)
-			*(cdest++) = *(csrc++);
+		memcpy(dest, src, bytes);
 }
 
 int memcmp (const char *a2, const char *a1, int bytes) {
@@ -100,6 +168,12 @@ void tohex(char *s, unsigned long l)
 	}
 }
 
+void btohex(char *s, unsigned char c)
+{
+	s[0] = hexarr[c >> 4];
+	s[1] = hexarr[c & 0xF];
+}
+
 void puthex(unsigned long l)
 {
 	char d[9];