fix: Make CppCheck happy by fixing the code

[cassiopeia.git] / src / util.cpp

diff --git a/src/util.cpp b/src/util.cpp
index f04c4ae036bd9833a971c3d64993f2310296deb8..f3d95c0ad522f3933ab1e7e57bf94d445a28d715 100644 (file)
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -3,6 +3,10 @@
 #include <sys/stat.h>
 
 #include <fstream>
+#include <iostream>
+#include <sstream>
+#include <time.h>
+#include <stdexcept>
 
 void writeFile( const std::string& name, const std::string& content ) {
     std::ofstream file;
@@ -40,3 +44,111 @@ std::string writeBackFile( const std::string& serial, const std::string& cert, c
 
     return filename;
 }
+bool isDigit( char c ) {
+    return ( c >= '0' ) && ( c <= '9' );
+}
+
+std::pair<bool, time_t> parseDate( const std::string& date ) {
+    if( date.size() != 10 || date[4] != '-' || date[7] != '-' ) {
+        return std::pair<bool, time_t>( false, 0 );
+    }
+
+    if( !isDigit( date[0] )
+            || !isDigit( date[1] )
+            || !isDigit( date[2] )
+            || !isDigit( date[3] )
+            || !isDigit( date[5] )
+            || !isDigit( date[6] )
+            || !isDigit( date[8] )
+            || !isDigit( date[9] ) ) {
+        return std::pair<bool, time_t>( false, 0 );
+    }
+
+    std::tm t;
+    t.tm_sec = 0;
+    t.tm_min = 0;
+    t.tm_hour = 0;
+    t.tm_year = std::stoi( date.substr( 0, 4 ) ) - 1900;
+    t.tm_mon = std::stoi( date.substr( 5, 2 ) ) - 1;
+    t.tm_mday = std::stoi( date.substr( 8, 2 ) );
+    setenv( "TZ", "UTC", 1 );
+    tzset();
+    std::time_t res = mktime( &t );
+    char check[11];
+    std::size_t siz = strftime( check, 11, "%Y-%m-%d", &t );
+
+    if( siz != 10 ) {
+        return std::pair<bool, time_t>( false, 0 );
+    }
+
+    std::string checkS( check, siz );
+
+    if( checkS != date ) {
+        return std::pair<bool, time_t>( false, 0 );
+    }
+
+    return std::pair<bool, time_t>( true, res );
+}
+
+std::pair<bool, time_t> addMonths( std::time_t t, int32_t count ) {
+    std::tm* parsed = gmtime( &t );
+
+    if( !parsed || count <= 0 || count > 24 ) { // FIXED MAX-Validity-Length
+        return std::pair<bool, time_t>( false, 0 );
+    }
+
+    parsed->tm_mon += count;
+    int oldday = parsed->tm_mday;
+    setenv( "TZ", "UTC", 1 );
+    tzset();
+    std::time_t res = mktime( parsed );
+
+    if( parsed->tm_mday != oldday ) {
+        parsed->tm_mday = 0;
+        res = mktime( parsed );
+    }
+
+    return std::pair<bool, time_t>( true, res );
+
+}
+
+std::pair<bool, time_t> parseMonthInterval( std::time_t t, const std::string& date ) {
+    if( date[date.size() - 1] != 'm' ) {
+        return  std::pair<bool, time_t>( false, 0 );
+    }
+
+    try {
+        size_t end = 0;
+        int num = std::stoi( date.substr( 0, date.size() - 1 ) , &end );
+
+        if( end != date.size() - 1 ) {
+            return  std::pair<bool, time_t>( false, 0 );
+        }
+
+        return addMonths( t, num );
+    } catch( const std::invalid_argument& a ) {
+        return std::pair<bool, time_t>( false, 0 );
+    } catch( const std::out_of_range& a ) {
+        return std::pair<bool, time_t>( false, 0 );
+    }
+}
+std::pair<bool, time_t> parseYearInterval( std::time_t t, const std::string& date ) {
+    if( date[date.size() - 1] != 'y' ) {
+        return  std::pair<bool, time_t>( false, 0 );
+    }
+
+    try {
+        size_t end = 0;
+        int num = std::stoi( date.substr( 0, date.size() - 1 ), &end );
+
+        if( end != date.size() - 1 ) {
+            return  std::pair<bool, time_t>( false, 0 );
+        }
+
+        return addMonths( t, num * 12 );
+    } catch( std::invalid_argument& a ) {
+        return std::pair<bool, time_t>( false, 0 );
+    } catch( std::out_of_range& a ) {
+        return std::pair<bool, time_t>( false, 0 );
+    }
+}