new trunk based on current 1.2

[rrdtool.git] / src / hash_32.c

diff --git a/src/hash_32.c b/src/hash_32.c
index 3fda164..d7edbee 100644 (file)
--- a/src/hash_32.c
+++ b/src/hash_32.c
@@ -86,10 +86,10 @@
  *      argument on the first call to either fnv_32_buf() or fnv_32_str().
  */
 Fnv32_t
-fnv_32_buf(void *buf, size_t len, Fnv32_t hval)
+fnv_32_buf(const void *buf, size_t len, Fnv32_t hval)
 {
-    unsigned char *bp = (unsigned char *)buf;  /* start of buffer */
-    unsigned char *be = bp + len;              /* beyond end of buffer */
+    const unsigned char *bp = (const unsigned char *)buf;      /* start of buffer */
+    const unsigned char *be = bp + len;                /* beyond end of buffer */
 
     /*
      * FNV-1 hash each octet in the buffer
@@ -125,9 +125,9 @@ fnv_32_buf(void *buf, size_t len, Fnv32_t hval)
  *      argument on the first call to either fnv_32_buf() or fnv_32_str().
  */
 Fnv32_t
-fnv_32_str(char *str, Fnv32_t hval)
+fnv_32_str(const char *str, Fnv32_t hval)
 {
-    unsigned char *s = (unsigned char *)str;   /* unsigned string */
+    const unsigned char *s = (const unsigned char *)str;       /* unsigned string */
 
     /*
      * FNV-1 hash each octet in the buffer
@@ -146,7 +146,7 @@ fnv_32_str(char *str, Fnv32_t hval)
 }
 
 /* a wrapper function for fnv_32_str */
-unsigned long FnvHash(char *str)
+unsigned long FnvHash(const char *str)
 {
   return fnv_32_str(str,FNV1_32_INIT);
 }