[nemiver] Detect when a string is a number

[Dodji Seketeli <dodji src gnome org>]

commit 83e31a48b606e0676d1ff5c85d649eaee917f626
Author: Dodji Seketeli <dodji redhat com>
Date:   Sat Apr 24 22:08:48 2010 +0200

    Detect when a string is a number
    
    	* src/common/nmv-str-utils.[cc|] (string_is_number,
    	string_is_hexa_number):  New fns.

 src/common/nmv-str-utils.cc |   30 ++++++++++++++++++++++++++++++
 src/common/nmv-str-utils.h  |    2 ++
 2 files changed, 32 insertions(+), 0 deletions(-)
---
diff --git a/src/common/nmv-str-utils.cc b/src/common/nmv-str-utils.cc
index f814b87..645090e 100644
--- a/src/common/nmv-str-utils.cc
+++ b/src/common/nmv-str-utils.cc
@@ -100,6 +100,36 @@ int_to_string (size_t an_int)
     return str;
 }
 
+bool
+string_is_number (const string &a_str)
+{
+    for (unsigned i = 0; i < a_str.size (); ++i)
+        if (!isdigit (a_str[i]))
+            return false;
+
+    return true;
+}
+
+bool
+string_is_hexa_number (const string &a_str)
+{
+
+    if (a_str.empty ())
+        return false;
+
+    unsigned i = 0;
+    if (a_str.size () > 2
+        && a_str[0] == '0'
+        && (a_str[1] == 'x' || a_str[1] == 'X'))
+        i = 2;
+
+    for (; i < a_str.size (); ++i)
+        if (!isxdigit (a_str[i]))
+            return false;
+
+    return true;
+}
+
 std::vector<UString>
 split (const UString &a_string, const UString &a_delim)
 {
diff --git a/src/common/nmv-str-utils.h b/src/common/nmv-str-utils.h
index b901902..afed527 100644
--- a/src/common/nmv-str-utils.h
+++ b/src/common/nmv-str-utils.h
@@ -37,6 +37,8 @@ extract_path_and_line_num_from_location (const std::string &a_location,
                                          std::string &a_line_num);
 size_t hexa_to_int (const string &a_hexa_str);
 std::string int_to_string (size_t an_int);
+bool string_is_number (const string&);
+bool string_is_hexa_number (const string &a_str);
 vector<UString> split (const UString &a_string, const UString &a_delim);
 vector<UString> split_set (const UString &a_string, const UString &a_delim_set);
 UString join (const vector<UString> &a_elements,