Improved XMP value toLong, toFloat and toRational using new functions parseLong, parseFloat and parseRational. (Vladimir Nadvornik)

samples/stringto-test.cpp

@@ -0,0 +1,77 @@
+// ***************************************************************** -*- C++ -*-
+// stringto-test.cpp, $Rev$
+// Test conversions from string to long, float and Rational types.
+
+#include <exiv2/types.hpp>
+#include <exiv2/error.hpp>
+#include <iostream>
+#include <iomanip>
+
+const char* testcases[] = {
+    // bool
+    "True",
+    "False",
+    "t",
+    "f",
+    // long
+    "-1",
+    "0",
+    "1",
+    // float
+    "0.0",
+    "0.1",
+    "0.01",
+    "0.001",
+    "-1.49999",
+    "-1.5",
+    "1.49999",
+    "1.5",
+    // Rational
+    "0/1",
+    "1/1",
+    "1/3",
+    "-1/3",
+    "4/3",
+    "-4/3",
+    "0/0",
+    // nok
+    "text"
+};
+
+int main()
+{
+    std::cout << std::setfill(' ');
+
+    std::cout << std::setw(12) << std::left << "string";
+    std::cout << std::setw(12) << std::left << "long";
+    std::cout << std::setw(12) << std::left << "float";
+    std::cout << std::setw(12) << std::left << "Rational";
+
+    std::cout << std::endl;
+
+    for (unsigned int i = 0; i < EXV_COUNTOF(testcases); ++i) try {
+        std::string s(testcases[i]);
+        std::cout << std::setw(12) << std::left << s;
+        bool ok;
+
+        long l = Exiv2::parseLong(s, ok);
+        std::cout << std::setw(12) << std::left;
+        if (ok) std::cout << l; else std::cout << "nok";
+
+        float f = Exiv2::parseFloat(s, ok);
+        std::cout << std::setw(12) << std::left;
+        if (ok) std::cout << f; else std::cout << "nok";
+
+        Exiv2::Rational r = Exiv2::parseRational(s, ok);
+        if (ok) std::cout << r.first << "/" << r.second;
+        else std::cout << "nok";
+
+        std::cout << std::endl;
+    }
+    catch (Exiv2::AnyError& e) {
+        std::cout << "Caught Exiv2 exception '" << e << "'\n";
+        return -1;
+    }
+
+    return 0;
+}