Initial commit

wiipax/stub/string.c

@@ -0,0 +1,94 @@
+/*
+ *  linux/lib/string.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+#include "string.h"
+
+size_t strnlen(const char *s, size_t count)
+{
+	const char *sc;
+
+	for (sc = s; count-- && *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+size_t strlen(const char *s)
+{
+	const char *sc;
+
+	for (sc = s; *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+char *strncpy(char *dst, const char *src, size_t n)
+{
+	char *ret = dst;
+
+	while (n && (*dst++ = *src++))
+		n--;
+
+	while (n--)
+		*dst++ = 0;
+
+	return ret;
+}
+
+char *strcpy(char *dst, const char *src)
+{
+	char *ret = dst;
+
+	while ((*dst++ = *src++))
+		;
+
+	return ret;
+}
+
+int strcmp(const char *p, const char *q)
+{
+	for (;;) {
+		unsigned char a, b;
+		a = *p++;
+		b = *q++;
+		if (a == 0 || a != b)
+			return a - b;
+	}
+}
+
+void *memset(void *dst, int x, size_t n)
+{
+	unsigned char *p;
+
+	for (p = dst; n; n--)
+		*p++ = x;
+
+	return dst;
+}
+
+void *memcpy(void *dst, const void *src, size_t n)
+{
+	unsigned char *p;
+	const unsigned char *q;
+
+	for (p = dst, q = src; n; n--)
+		*p++ = *q++;
+
+	return dst;
+}
+
+int memcmp(const void *s1, const void *s2, size_t n)
+{
+	unsigned char *us1 = (unsigned char *) s1;
+	unsigned char *us2 = (unsigned char *) s2;
+	while (n-- != 0) {
+		if (*us1 != *us2)
+			return (*us1 < *us2) ? -1 : +1;
+		us1++;
+		us2++;
+	}
+	return 0;
+}
+