Mention world location at server startup at action level

[dragonfireclient.git] / src / utility.h

diff --git a/src/utility.h b/src/utility.h
index 14b49772bdbdbf4f6e9b83e4ce44831638f866e9..aa64c28bb601ceb3be158917d939c461c60a89ed 100644 (file)
--- a/src/utility.h
+++ b/src/utility.h
@@ -694,6 +694,46 @@ class TimeTaker
        u32 *m_result;
 };
 
+// Tests if two strings are equal, optionally case insensitive
+inline bool str_equal(const std::wstring& s1, const std::wstring& s2,
+               bool case_insensitive = false)
+{
+       if(case_insensitive)
+       {
+               if(s1.size() != s2.size())
+                       return false;
+               for(size_t i = 0; i < s1.size(); ++i)
+                       if(tolower(s1[i]) != tolower(s2[i]))
+                               return false;
+               return true;
+       }
+       else
+       {
+               return s1 == s2;
+       }
+}
+
+// Tests if the second string is a prefix of the first, optionally case insensitive
+inline bool str_starts_with(const std::wstring& str, const std::wstring& prefix,
+               bool case_insensitive = false)
+{
+       if(str.size() < prefix.size())
+               return false;
+       if(case_insensitive)
+       {
+               for(size_t i = 0; i < prefix.size(); ++i)
+                       if(tolower(str[i]) != tolower(prefix[i]))
+                               return false;
+       }
+       else
+       {
+               for(size_t i = 0; i < prefix.size(); ++i)
+                       if(str[i] != prefix[i])
+                               return false;
+       }
+       return true;
+}
+
 // Calculates the borders of a "d-radius" cube
 inline void getFacePositions(core::list<v3s16> &list, u16 d)
 {
@@ -1565,6 +1605,15 @@ inline std::string wrap_rows(const std::string &from, u32 rowlen)
 #define MYMIN(a,b) ((a)<(b)?(a):(b))
 #define MYMAX(a,b) ((a)>(b)?(a):(b))
 
+/*
+       Returns nearest 32-bit integer for given floating point number.
+       <cmath> and <math.h> in VC++ don't provide round().
+*/
+inline s32 myround(f32 f)
+{
+       return floor(f + 0.5);
+}
+
 /*
        Returns integer position of node in given floating point position
 */
@@ -1694,6 +1743,12 @@ inline std::string deSerializeLongString(std::istream &is)
        return s;
 }
 
+// Creates a string encoded in JSON format (almost equivalent to a C string literal)
+std::string serializeJsonString(const std::string &plain);
+
+// Reads a string encoded in JSON format
+std::string deSerializeJsonString(std::istream &is);
+
 //
 
 inline u32 time_to_daynight_ratio(u32 time_of_day)
@@ -1751,6 +1806,50 @@ class IntervalLimiter
        float m_accumulator;
 };
 
+/*
+       Splits a list into "pages". For example, the list [1,2,3,4,5] split
+       into two pages would be [1,2,3],[4,5]. This function computes the
+       minimum and maximum indices of a single page.
+
+       length: Length of the list that should be split
+       page: Page number, 1 <= page <= pagecount
+       pagecount: The number of pages, >= 1
+       minindex: Receives the minimum index (inclusive).
+       maxindex: Receives the maximum index (exclusive).
+
+       Ensures 0 <= minindex <= maxindex <= length.
+*/
+inline void paging(u32 length, u32 page, u32 pagecount, u32 &minindex, u32 &maxindex)
+{
+       if(length < 1 || pagecount < 1 || page < 1 || page > pagecount)
+       {
+               // Special cases or invalid parameters
+               minindex = maxindex = 0;
+       }
+       else if(pagecount <= length)
+       {
+               // Less pages than entries in the list:
+               // Each page contains at least one entry
+               minindex = (length * (page-1) + (pagecount-1)) / pagecount;
+               maxindex = (length * page + (pagecount-1)) / pagecount;
+       }
+       else
+       {
+               // More pages than entries in the list:
+               // Make sure the empty pages are at the end
+               if(page < length)
+               {
+                       minindex = page-1;
+                       maxindex = page;
+               }
+               else
+               {
+                       minindex = 0;
+                       maxindex = 0;
+               }
+       }
+}
+
 std::string translatePassword(std::string playername, std::wstring password);
 
 enum PointedThingType