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// Common/Lang.cpp
#include "StdAfx.h"
#include "Lang.h"
#include "StringToInt.h"
#include "UTFConvert.h"
#include "../Windows/FileIO.h"
void CLang::Clear() throw()
{
delete []_text;
_text = 0;
_ids.Clear();
_offsets.Clear();
}
static const wchar_t *kLangSignature = L";!@Lang2@!UTF-8!";
bool CLang::OpenFromString(const AString &s2)
{
UString s;
if (!ConvertUTF8ToUnicode(s2, s))
return false;
unsigned i = 0;
if (s.IsEmpty())
return false;
if (s[0] == 0xFEFF)
i++;
for (const wchar_t *p = kLangSignature;; i++)
{
wchar_t c = *p++;
if (c == 0)
break;
if (s[i] != c)
return false;
}
_text = new wchar_t[s.Len() - i + 1];
wchar_t *text = _text;
Int32 id = -100;
UInt32 pos = 0;
while (i < s.Len())
{
unsigned start = pos;
do
{
wchar_t c = s[i++];
if (c == '\n')
break;
if (c == '\\')
{
if (i == s.Len())
return false;
c = s[i++];
switch (c)
{
case '\n': return false;
case 'n': c = '\n'; break;
case 't': c = '\t'; break;
case '\\': c = '\\'; break;
default: text[pos++] = L'\\'; break;
}
}
text[pos++] = c;
}
while (i < s.Len());
{
unsigned j = start;
for (; j < pos; j++)
if (text[j] != ' ')
break;
if (j == pos)
{
id++;
continue;
}
}
if (text[start] == ';')
{
pos = start;
id++;
continue;
}
text[pos++] = 0;
const wchar_t *end;
UInt32 id32 = ConvertStringToUInt32(text + start, &end);
if (*end == 0)
{
if (id32 > ((UInt32)1 << 30) || (Int32)id32 < id)
return false;
id = (Int32)id32;
pos = start;
continue;
}
if (id < 0)
return false;
_ids.Add((UInt32)id++);
_offsets.Add(start);
}
return true;
}
bool CLang::Open(CFSTR fileName, const wchar_t *id)
{
Clear();
NWindows::NFile::NIO::CInFile file;
if (!file.Open(fileName))
return false;
UInt64 length;
if (!file.GetLength(length))
return false;
if (length > (1 << 20))
return false;
AString s;
unsigned len = (unsigned)length;
char *p = s.GetBuffer(len);
UInt32 processed;
if (!file.Read(p, len, processed))
return false;
file.Close();
if (len != processed)
return false;
char *p2 = p;
for (unsigned i = 0; i < len; i++)
{
char c = p[i];
if (c == 0)
break;
if (c != 0x0D)
*p2++ = c;
}
s.ReleaseBuffer((unsigned)(p2 - p));
if (OpenFromString(s))
{
const wchar_t *s = Get(0);
if (s && wcscmp(s, id) == 0)
return true;
}
Clear();
return false;
}
const wchar_t *CLang::Get(UInt32 id) const throw()
{
int index = _ids.FindInSorted(id);
if (index < 0)
return NULL;
return _text + (size_t)_offsets[index];
}
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