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  1. #include <iostream>
  2. #include <string>
  3.  
  4. std::string query_encode(const std::string &s)
  5. {
  6.     std::string ret;
  7.  
  8.     #define IS_BETWEEN(ch, low, high) (ch >= low && ch <= high)
  9.     #define IS_ALPHA(ch) (IS_BETWEEN(ch, 'A', 'Z') || IS_BETWEEN(ch, 'a', 'z'))
  10.     #define IS_DIGIT(ch) IS_BETWEEN(ch, '0', '9')
  11.     #define IS_HEXDIG(ch) (IS_DIGIT(ch) || IS_BETWEEN(ch, 'A', 'F') || IS_BETWEEN(ch, 'a', 'f'))
  12.  
  13.     for(size_t i = 0; i < s.size();)
  14.     {
  15.         char ch = s[i++];
  16.  
  17.         if (IS_ALPHA(ch) || IS_DIGIT(ch))
  18.         {
  19.             ret += ch;
  20.         }
  21.         else if ((ch == '%') && IS_HEXDIG(s[i+0]) && IS_HEXDIG(s[i+1]))
  22.         {
  23.             ret += s.substr(i-1, 3);
  24.             i += 2;
  25.         }
  26.         else
  27.         {
  28.             switch (ch)
  29.             {
  30.                 case '-':
  31.                 case '.':
  32.                 case '_':
  33.                 case '~':
  34.                 case '!':
  35.                 case '$':
  36.                 case '&':
  37.                 case '\'':
  38.                 case '(':
  39.                 case ')':
  40.                 case '*':
  41.                 case '+':
  42.                 case ',':
  43.                 case ';':
  44.                 case '=':
  45.                 case ':':
  46.                 case '@':
  47.                 case '/':
  48.                 case '?':
  49.                 case '[':
  50.                 case ']':
  51.                     ret += ch;
  52.                     break;
  53.  
  54.                 default:
  55.                 {
  56.                     static const char hex[] = "0123456789ABCDEF";
  57.                     char pct[] = "%  ";
  58.                     pct[1] = hex[(ch >> 4) & 0xF];
  59.                     pct[2] = hex[ch & 0xF];
  60.                     ret.append(pct, 3);
  61.                     break;
  62.                 }
  63.             }
  64.         }
  65.     }
  66.  
  67.     return ret;
  68. }
  69.  
  70. int main()
  71. {
  72.     std::string d = "https://w...content-available-to-author-only...i.de/api/interpreter?data=" + query_encode("area[\"name\"=\"Nicaragua\"][\"admin_level\"=\"2\"]->.boundaryarea;(node[\"type\"=\"route\"][\"route\"=\"bus\"](area.boundaryarea);way[\"type\"=\"route\"][\"route\"=\"bus\"](area.boundaryarea);>;relation[\"type\"=\"route\"][\"route\"=\"bus\"](area.boundaryarea);>>;);out meta;");
  73.     std::cout << "Encoded: " + d + "\n";
  74. 	return 0;
  75. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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Encoded: https://w...content-available-to-author-only...i.de/api/interpreter?data=area[%22name%22=%22Nicaragua%22][%22admin_level%22=%222%22]-%3E.boundaryarea;(node[%22type%22=%22route%22][%22route%22=%22bus%22](area.boundaryarea);way[%22type%22=%22route%22][%22route%22=%22bus%22](area.boundaryarea);%3E;relation[%22type%22=%22route%22][%22route%22=%22bus%22](area.boundaryarea);%3E%3E;);out%20meta;
https://ideone.com/tMLQWb
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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