libvspell/shuffle.cpp

   1 // -*- tab-width: 2 mode: c++ -*-
   2 #include "shuffle.h"
   3 #include "spell.h"
   4
   5 using namespace std;
   6
   7 void CharInserter::init(const char *input_)
   8 {
   9         input = input_;
  10         len = input.size();
  11         i = i2 = 0;
  12 }
  13
  14 bool CharInserter::step(string &output)
  15 {
  16         static char *candidates = "qwertyuiopasdfghjklzxcvbnm";
  17         uint len2 = strlen(candidates);
  18
  19         if (i > len)
  20                 return false;
  21
  22         output = input;
  23         output.insert(output.begin()+i,candidates[i2]);
  24         i2 ++;
  25         if (i2 == len2) {
  26                 i2 = 0;
  27                 i ++;
  28         }
  29         return true;
  30 }
  31
  32 void CharInserter::done()
  33 {
  34 }
  35
  36 void CharEraser::init(const char *input_)
  37 {
  38         input = input_;
  39         len = input.size();
  40         i = 0;
  41 }
  42
  43 bool CharEraser::step(string &output)
  44 {
  45         if (i >= len)
  46                 return false;
  47
  48         output = input;
  49         output.erase(i,1);
  50         i ++;
  51
  52         return true;
  53 }
  54
  55 void CharEraser::done()
  56 {
  57 }
  58
  59 void CharTransposer::init(const char *input_)
  60 {
  61         input = input_;
  62         len = input.size();
  63         i = 0;
  64 }
  65
  66 bool CharTransposer::step(string &output)
  67 {
  68         if (i >= len-1)
  69                 return false;
  70
  71         char c;
  72         output = input;
  73         c = output[i];
  74         output[i] = output[i+1];
  75         output[i+1] = c;
  76         i ++;
  77
  78         return true;
  79 }
  80
  81 void CharTransposer::done()
  82 {
  83 }
  84