X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/c54a4356fd904634dae9b942fb3a587cdcb860b9..3c4e084de9ed00171748c20de1251d347fc33c1c:/lib/minilib.c

diff --git a/lib/minilib.c b/lib/minilib.c
index 232878b..392eae7 100644
--- a/lib/minilib.c
+++ b/lib/minilib.c
@@ -1,12 +1,77 @@
+/* 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, 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)
 {
-	char * cdest = dest;
-	char * csrc = src;
-	while (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;
+	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)
+{
+	unsigned char *cdest = dest;
+	while (bytes--)
+		*(cdest++) = (unsigned char)data;
 }
 
 void memmove(void *dest, void *src, int bytes)
@@ -21,8 +86,7 @@ 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) {
@@ -43,7 +107,17 @@ int strcmp (const char *a2, const char *a1) {
 	}
 }
 
-int strlen(char *c)
+int strncmp (const char *a2, const char *a1, int n) {
+	while (n--) {
+		if (*a2 != *a1) return 1;
+		if (*a2 == 0) return 0;
+		a1++;
+		a2++;
+	}
+	return 0;
+}
+
+int strlen(const char *c)
 {
 	int l = 0;
 	while (*(c++))
@@ -58,7 +132,16 @@ void strcpy(char *a2, const char *a1)
 	} while (*(a1++));
 }
 
-void puts(char *c)
+void strcat(char *dest, char *src)
+{
+	while (*dest)
+		dest++;
+	while (*src)
+		*(dest++) = *(src++);
+	*(dest++) = *(src++);
+}
+
+void puts(const char *c)
 {
 	putbytes(c, strlen(c));
 }
@@ -82,4 +165,15 @@ void puthex(unsigned long l)
 	puts(d);
 }
 
+unsigned short htons(unsigned short in)
+{
+	return (in >> 8) | (in << 8);
+}
 
+unsigned int htonl(unsigned int in)
+{
+	return ((in & 0xff) << 24) |
+	       ((in & 0xff00) << 8) |
+	       ((in & 0xff0000UL) >> 8) |
+	       ((in & 0xff000000UL) >> 24);
+}