tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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TextConfig.cpp (2718B)

      1 // Common/TextConfig.cpp
      2 
      3 #include "StdAfx.h"
      4 
      5 #include "TextConfig.h"
      6 #include "UTFConvert.h"
      7 
      8 static inline bool IsDelimitChar(char c)
      9 {
     10  return (c == ' ' || c == 0x0A || c == 0x0D || c == '\0' || c == '\t');
     11 }
     12    
     13 static AString GetIDString(const char *s, unsigned &finishPos)
     14 {
     15  AString result;
     16  for (finishPos = 0; ; finishPos++)
     17  {
     18    char c = s[finishPos];
     19    if (IsDelimitChar(c) || c == '=')
     20      break;
     21    result += c;
     22  }
     23  return result;
     24 }
     25 
     26 static bool WaitNextLine(const AString &s, unsigned &pos)
     27 {
     28  for (; pos < s.Len(); pos++)
     29    if (s[pos] == 0x0A)
     30      return true;
     31  return false;
     32 }
     33 
     34 static bool SkipSpaces(const AString &s, unsigned &pos)
     35 {
     36  for (; pos < s.Len(); pos++)
     37  {
     38    char c = s[pos];
     39    if (!IsDelimitChar(c))
     40    {
     41      if (c != ';')
     42        return true;
     43      if (!WaitNextLine(s, pos))
     44        return false;
     45    }
     46  }
     47  return false;
     48 }
     49 
     50 bool GetTextConfig(const AString &s, CObjectVector<CTextConfigPair> &pairs)
     51 {
     52  pairs.Clear();
     53  unsigned pos = 0;
     54 
     55  /////////////////////
     56  // read strings
     57 
     58  for (;;)
     59  {
     60    if (!SkipSpaces(s, pos))
     61      break;
     62    CTextConfigPair pair;
     63    unsigned finishPos;
     64    const AString temp (GetIDString(((const char *)s) + pos, finishPos));
     65    if (!ConvertUTF8ToUnicode(temp, pair.ID))
     66      return false;
     67    if (finishPos == 0)
     68      return false;
     69    pos += finishPos;
     70    if (!SkipSpaces(s, pos))
     71      return false;
     72    if (s[pos] != '=')
     73      return false;
     74    pos++;
     75    if (!SkipSpaces(s, pos))
     76      return false;
     77    if (s[pos] != '\"')
     78      return false;
     79    pos++;
     80    AString message;
     81    for (;;)
     82    {
     83      if (pos >= s.Len())
     84        return false;
     85      char c = s[pos++];
     86      if (c == '\"')
     87        break;
     88      if (c == '\\')
     89      {
     90        c = s[pos++];
     91        switch (c)
     92        {
     93          case 'n': message += '\n'; break;
     94          case 't': message += '\t'; break;
     95          case '\\': message += '\\'; break;
     96          case '\"': message += '\"'; break;
     97          default: message += '\\'; message += c; break;
     98        }
     99      }
    100      else
    101        message += c;
    102    }
    103    if (!ConvertUTF8ToUnicode(message, pair.String))
    104      return false;
    105    pairs.Add(pair);
    106  }
    107  return true;
    108 }
    109 
    110 int FindTextConfigItem(const CObjectVector<CTextConfigPair> &pairs, const char *id) throw()
    111 {
    112  FOR_VECTOR (i, pairs)
    113    if (pairs[i].ID.IsEqualTo(id))
    114      return i;
    115  return -1;
    116 }
    117 
    118 UString GetTextConfigValue(const CObjectVector<CTextConfigPair> &pairs, const char *id)
    119 {
    120  int index = FindTextConfigItem(pairs, id);
    121  if (index < 0)
    122    return UString();
    123  return pairs[index].String;
    124 }