Allow INIReader to read 64-bit integers (#151)

Add INIReader::GetInteger64 and INIReader::GetUnsigned64

Author: kittymaya

cpp/INIReader.cpp

@@ -56,6 +56,16 @@ long INIReader::GetInteger(const string& section, const string& name, long defau
     return end > value ? n : default_value;
 }
 
+INI_API int64_t INIReader::GetInteger64(const std::string& section, const std::string& name, int64_t default_value) const
+{
+    string valstr = Get(section, name, "");
+    const char* value = valstr.c_str();
+    char* end;
+    // This parses "1234" (decimal) and also "0x4D2" (hex)
+    int64_t n = strtoll(value, &end, 0);
+    return end > value ? n : default_value;
+}
+
 unsigned long INIReader::GetUnsigned(const string& section, const string& name, unsigned long default_value) const
 {
     string valstr = Get(section, name, "");
@@ -66,6 +76,16 @@ unsigned long INIReader::GetUnsigned(const string& section, const string& name,
     return end > value ? n : default_value;
 }
 
+INI_API uint64_t INIReader::GetUnsigned64(const std::string& section, const std::string& name, uint64_t default_value) const
+{
+    string valstr = Get(section, name, "");
+    const char* value = valstr.c_str();
+    char* end;
+    // This parses "1234" (decimal) and also "0x4D2" (hex)
+    uint64_t n = strtoull(value, &end, 0);
+    return end > value ? n : default_value;
+}
+
 double INIReader::GetReal(const string& section, const string& name, double default_value) const
 {
     string valstr = Get(section, name, "");

cpp/INIReader.h

@@ -14,6 +14,7 @@
 
 #include <map>
 #include <string>
+#include <cstdint>
 
 // Visibility symbols, required for Windows DLLs
 #ifndef INI_API
@@ -66,11 +67,18 @@ class INIReader
     // not found or not a valid integer (decimal "1234", "-1234", or hex "0x4d2").
     INI_API long GetInteger(const std::string& section, const std::string& name, long default_value) const;
 
-    // Get an unsigned integer (unsigned long) value from INI file,
-    // returning default_value if not found or not a valid integer 
-    // (decimal "1234", or hex "0x4d2").
+    // Get a 64-bit integer (int64_t) value from INI file, returning default_value if
+    // not found or not a valid integer (decimal "1234", "-1234", or hex "0x4d2").
+    INI_API int64_t GetInteger64(const std::string& section, const std::string& name, int64_t default_value) const;
+
+    // Get an unsigned integer (unsigned long) value from INI file, returning default_value if
+    // not found or not a valid unsigned integer (decimal "1234", or hex "0x4d2").
     INI_API unsigned long GetUnsigned(const std::string& section, const std::string& name, unsigned long default_value) const;
 
+    // Get an unsigned 64-bit integer (uint64_t) value from INI file, returning default_value if
+    // not found or not a valid unsigned integer (decimal "1234", or hex "0x4d2").
+    INI_API uint64_t GetUnsigned64(const std::string& section, const std::string& name, uint64_t default_value) const;
+
     // Get a real (floating point double) value from INI file, returning
     // default_value if not found or not a valid floating point value
     // according to strtod().

examples/INIReaderExample.cpp

@@ -13,7 +13,9 @@ int main()
     }
     std::cout << "Config loaded from 'test.ini': version="
               << reader.GetInteger("protocol", "version", -1) << ", unsigned version="
-              << reader.GetUnsigned("protocol", "version", -1) << ", name="
+              << reader.GetUnsigned("protocol", "version", -1) << ", trillion="
+              << reader.GetInteger64("user", "trillion", -1) << ", unsigned trillion="
+              << reader.GetUnsigned64("user", "trillion", -1) << ", name="
               << reader.Get("user", "name", "UNKNOWN") << ", email="
               << reader.Get("user", "email", "UNKNOWN") << ", pi="
               << reader.GetReal("user", "pi", -1) << ", active="

examples/cpptest.txt

@@ -1,3 +1,3 @@
-Config loaded from 'test.ini': version=6, unsigned version=6, name=Bob Smith, [email protected], pi=3.14159, active=1
+Config loaded from 'test.ini': version=6, unsigned version=6, trillion=1000000000000, unsigned trillion=1000000000000, name=Bob Smith, [email protected], pi=3.14159, active=1
 Has values: user.name=1, user.nose=0
 Has sections: user=1, fizz=0

examples/test.ini

@@ -1,10 +1,11 @@
 ; Test config file for ini_example.c and INIReaderTest.cpp
 
-[protocol]             ; Protocol configuration
-version=6              ; IPv6
+[protocol]               ; Protocol configuration
+version=6                ; IPv6
 
 [user]
-name = Bob Smith       ; Spaces around '=' are stripped
-email = [email protected]  ; And comments (like this) ignored
-active = true          ; Test a boolean
-pi = 3.14159           ; Test a floating point number
+name = Bob Smith         ; Spaces around '=' are stripped
+email = [email protected]    ; And comments (like this) ignored
+active = true            ; Test a boolean
+pi = 3.14159             ; Test a floating point number
+trillion = 1000000000000 ; Test 64-bit integers