From ef30871f679f15e3ce36d0ac222a5240b76e1c19 Mon Sep 17 00:00:00 2001
From: Armin Luntzer <armin.luntzer@univie.ac.at>
Date: Tue, 12 Nov 2019 16:07:58 +0100
Subject: [PATCH] add memset32(), memset16()
---
include/kernel/string.h | 3 +++
lib/string.c | 46 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/include/kernel/string.h b/include/kernel/string.h
index c0bd31d..b39f375 100644
--- a/include/kernel/string.h
+++ b/include/kernel/string.h
@@ -29,6 +29,9 @@ void *memcpy(void *dest, const void *src, size_t n);
char *strcpy(char *dest, const char *src);
void bzero(void *s, size_t n);
+void *memset16(void *s, uint16_t c, size_t n);
+void *memset32(void *s, uint32_t c, size_t n);
+
int isdigit(int c);
int isspace(int c);
int isalpha(int c);
diff --git a/lib/string.c b/lib/string.c
index d4d52f4..51a37bf 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -158,6 +158,7 @@ char *strdup(const char *s)
char *dup;
+
if (!s)
return NULL;
@@ -583,7 +584,7 @@ EXPORT_SYMBOL(atoi);
/**
- * @brief fills a memory area with with the constant byte c
+ * @brief fills a memory area with the constant byte c
*
* @param s a pointer to the memory area
* @param c the byte to set
@@ -604,6 +605,49 @@ void *memset(void *s, int c, size_t n)
EXPORT_SYMBOL(memset);
+/**
+ * @brief fills a memory area with the constant uint16_t c
+ *
+ * @param s a pointer to the memory area
+ * @param c the uint16_t to set
+ * @param n the number of uint16_t elements to fill
+ *
+ * @returns a pointer to the memory area s
+ */
+
+void *memset16(void *s, uint16_t c, size_t n)
+{
+ uint16_t *p = s;
+
+ while (n--)
+ *p++ = c;
+
+ return s;
+}
+EXPORT_SYMBOL(memset16);
+
+
+/**
+ * @brief fills a memory area with the constant uint32_t c
+ *
+ * @param s a pointer to the memory area
+ * @param c the uint32_t to set
+ * @param n the number of uint32_t elements to fill
+ *
+ * @returns a pointer to the memory area s
+ */
+
+void *memset32(void *s, uint32_t c, size_t n)
+{
+ uint32_t *p = s;
+
+ while (n--)
+ *p++ = c;
+
+ return s;
+}
+EXPORT_SYMBOL(memset32);
+
/**
* @brief convert a string to a long integer
--
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