common-utils.c: add gf_strn2boolean() function

The function takes a string and its length and based on it
returns if it's a boolean. It's identical in functionality
to gf_string2boolean only with far less string comparisons since
it takes into account the length of the string.

dict_get_str_boolean() has been converted to use it.

Other cases of gf_string2boolean() across the code base can be
converted as well, but more importantly, they should be converted
from dict_get_str() and then calling to gf_string2boolean to
simply call dict_get_str_boolean(), which would take care of this
for them.

This is therefore a first step in the conversion.

Change-Id: I9ee93abfc676f6e123a3919d8df8c25e8848b799
updates: bz#1193929
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index ddc3e486b6f..5814eb90e21 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -1941,6 +1941,74 @@ gf_string2boolean(const char *str, gf_boolean_t *b)
 }
 
 int
+gf_strn2boolean(const char *str, const int len, gf_boolean_t *b)
+{
+    if (str == NULL) {
+        gf_msg_callingfn(THIS->name, GF_LOG_WARNING, EINVAL, LG_MSG_INVALID_ARG,
+                         "argument invalid");
+        return -1;
+    }
+
+    switch (len) {
+        case 1:
+            if (strcasecmp(str, "1") == 0) {
+                *b = _gf_true;
+                return 0;
+            } else if (strcasecmp(str, "0") == 0) {
+                *b = _gf_false;
+                return 0;
+            }
+            break;
+        case 2:
+            if (strcasecmp(str, "on") == 0) {
+                *b = _gf_true;
+                return 0;
+            } else if (strcasecmp(str, "no") == 0) {
+                *b = _gf_false;
+                return 0;
+            }
+            break;
+        case 3:
+            if (strcasecmp(str, "yes") == 0) {
+                *b = _gf_true;
+                return 0;
+            } else if (strcasecmp(str, "off") == 0) {
+                *b = _gf_false;
+                return 0;
+            }
+            break;
+        case 4:
+            if (strcasecmp(str, "true") == 0) {
+                *b = _gf_true;
+                return 0;
+            }
+            break;
+        case 5:
+            if (strcasecmp(str, "false") == 0) {
+                *b = _gf_false;
+                return 0;
+            }
+            break;
+        case 6:
+            if (strcasecmp(str, "enable") == 0) {
+                *b = _gf_true;
+                return 0;
+            }
+            break;
+        case 7:
+            if (strcasecmp(str, "disable") == 0) {
+                *b = _gf_false;
+                return 0;
+            }
+            break;
+        default:
+            return -1;
+            break;
+    }
+    return -1;
+}
+
+int
 gf_lockfd(int fd)
 {
     struct gf_flock fl;