File kdump-Implement-KString-isHexNumber.patch of Package kdump.23238

From: Petr Tesarik <ptesarik@suse.com>
Date: Fri, 26 Feb 2021 10:41:14 +0100
Subject: Implement KString::isHexNumber
References: bsc#1180513
Upstream: merged
Git-commit: 1d8f3b99efc2b690fae3883edee318033c4eb6a9

Check whether a string is a valid hexadecimal number.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
 kdumptool/stringutil.cc |   15 +++++++++++++++
 kdumptool/stringutil.h  |    8 ++++++++
 2 files changed, 23 insertions(+)

--- a/kdumptool/stringutil.cc
+++ b/kdumptool/stringutil.cc
@@ -307,6 +307,21 @@ bool KString::isNumber()
 }
 
 // -----------------------------------------------------------------------------
+bool KString::isHexNumber()
+    throw ()
+{
+    iterator it = begin();
+
+    if (it == end())
+        return false;
+    do {
+        if (!isxdigit(*it))
+          return false;
+    } while (++it != end());
+    return true;
+}
+
+// -----------------------------------------------------------------------------
 KString& KString::trim(const char *chars)
     throw ()
 {
--- a/kdumptool/stringutil.h
+++ b/kdumptool/stringutil.h
@@ -248,6 +248,14 @@ class KString : public std::string {
         throw ();
 
         /**
+         * Checks if the string is a hexadecimal number (no leading '0x').
+         *
+         * @return true if it's a hex number, false otherwise
+         */
+        bool isHexNumber()
+        throw ();
+
+        /**
          * Remove trailing or leading stuff.
          *
          * @param[in] chars the characters to remove (default: white space)