libglusterfs/common-utils: Added gf_uint64_2human_readable function.

This function converts the given number to its corresponding representation in
KB, MB, etc.

Signed-off-by: Junaid <junaid@gluster.com>
Signed-off-by: Anand Avati <avati@gluster.com>

BUG: 2829 (Display the quota limit as it is configured)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2829

2 files changed, 38 insertions, 0 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index e745ec0fa..8d2dac680 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -1258,6 +1258,42 @@ gf_string2uint64_base10 (const char *str, uint64_t *n)
         return -1;
 }
 
+char *
+gf_uint64_2human_readable (uint64_t n)
+{
+        int   ret = 0;
+        char *str = NULL;
+
+        if (n >= GF_UNIT_PB) {
+                ret = gf_asprintf (&str, "%.1lfPB", ((double) n)/GF_UNIT_PB);
+                if (ret < 0)
+                        goto err;
+        } else if (n >= GF_UNIT_TB) {
+                ret = gf_asprintf (&str, "%.1lfTB", ((double) n)/GF_UNIT_TB);
+                if (ret < 0)
+                        goto err;
+        } else if (n >= GF_UNIT_GB) {
+                ret = gf_asprintf (&str, "%.1lfGB", ((double) n)/GF_UNIT_GB);
+                if (ret < 0)
+                        goto err;
+        } else if (n >= GF_UNIT_MB) {
+                ret = gf_asprintf (&str, "%.1lfMB", ((double) n)/GF_UNIT_MB);
+                if (ret < 0)
+                        goto err;
+        } else if (n >= GF_UNIT_KB) {
+                ret = gf_asprintf (&str, "%.1lfKB", ((double) n)/GF_UNIT_KB);
+                if (ret < 0)
+                        goto err;
+        } else {
+                ret = gf_asprintf (&str, "%luBytes", n);
+                if (ret < 0)
+                        goto err;
+        }
+        return str;
+err:
+        return NULL;
+}
+
 int
 gf_string2bytesize (const char *str, uint64_t *n)
 {
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index a1df3de35..9b15b9631 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -361,4 +361,6 @@ void _get_md5_str (char *out_str, size_t outlen,
 void gf_array_insertionsort (void *a, int l, int r, size_t elem_size,
                              gf_cmp cmp);
 int gf_is_str_int (const char *value);
+
+char *gf_uint64_2human_readable (uint64_t);
 #endif /* _COMMON_UTILS_H */