1 files changed, 26 insertions, 0 deletions
diff --git a/src/utils.cpp b/src/utils.cpp
index 9976e88..f0df772 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -426,3 +426,29 @@ void printEnsemble(const shared_ptr<dabEnsemble> ensemble)
     }
 }
 
+long hexparse(const std::string& input)
+{
+    long value = 0;
+    errno = 0;
+
+    // Do not use strtol's base=0 because
+    // we do not want to accept octal.
+    if (input.find("0x") == 0) {
+        value = strtol(input.c_str() + 2, nullptr, 16);
+    }
+    else {
+        value = strtol(input.c_str(), nullptr, 10);
+    }
+
+    if ((value == LONG_MIN or value == LONG_MAX) and errno == ERANGE) {
+        throw out_of_range("hexparse: value out of range");
+    }
+    else if (value == 0 and errno != 0) {
+        stringstream ss;
+        ss << "hexparse: " << strerror(errno);
+        throw invalid_argument(ss.str());
+    }
+
+    return value;
+}
+