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/*
Pcre.cpp
Copyright (c) 2007-2008 Chervov Dmitry
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "common.h"
#include <windows.h>
#include <stdio.h>
#include <crtdbg.h>
#include "newpluginapi.h"
#include "m_utils.h"
#include "TMyArray.h"
#include "CString.h"
#include "pcre.h"
HMODULE hPcreDLL = NULL;
static pcre* (*pcre_compile)(const char*, int, const char**, int*, const unsigned char*);
static int (*pcre_config)(int, void*);
static int (*pcre_exec)(const pcre*, const pcre_extra*, const char*, int, int, int, int*, int);
static void (*pcre_free)(void*);
static pcre_extra* (*pcre_study)(const pcre*, int, const char **);
typedef struct
{
pcre *pPcre;
pcre_extra *pExtra;
TCString Pattern; // used when it's not a valid regexp
int ID; // user-defined ID of the pattern; returned by PcreCheck on a match
} sPcreCompileData;
TMyArray<sPcreCompileData> PcreCompileData;
void FreePcreCompileData()
{
int I;
for (I = 0; I < PcreCompileData.GetSize(); I++)
{
if (PcreCompileData[I].pPcre)
{
pcre_free(PcreCompileData[I].pPcre);
if (PcreCompileData[I].pExtra)
{
pcre_free(PcreCompileData[I].pExtra);
}
}
}
PcreCompileData.RemoveAll();
}
TCString CompileRegexp(TCString Regexp, int bAddAsUsualSubstring, int ID)
{
TCString Result(_T(""));
sPcreCompileData s = {0};
int NewID = PcreCompileData.AddElem(s);
PcreCompileData[NewID].ID = ID;
if (hPcreDLL && !bAddAsUsualSubstring)
{
const char *Err;
int ErrOffs;
int Flags = PCRE_CASELESS;
if (Regexp[0] == '/')
{
TCString OrigRegexp = Regexp;
Regexp = Regexp.Right(Regexp.GetLen() - 1);
TCHAR *pRegexpEnd = (TCHAR*)Regexp + Regexp.GetLen();
TCHAR *p = _tcsrchr(Regexp.GetBuffer(), '/');
if (!p)
{
Regexp = OrigRegexp;
} else
{
*p = 0;
Flags = 0;
while (++p < pRegexpEnd)
{
switch (*p) {
case 'i':
Flags |= PCRE_CASELESS;
break;
case 'm':
Flags |= PCRE_MULTILINE;
break;
case 's':
Flags |= PCRE_DOTALL;
break;
case 'x':
Flags |= PCRE_EXTENDED;
break;
case 'A':
Flags |= PCRE_ANCHORED;
break;
case 'f':
Flags |= PCRE_FIRSTLINE;
break;
case 'D':
Flags |= PCRE_DOLLAR_ENDONLY;
break;
case 'U':
Flags |= PCRE_UNGREEDY;
break;
case 'X':
Flags |= PCRE_EXTRA;
break;
default:
// Result += LogMessage(Translate("Warning, unknown pattern modifier '%c':\n"), *p );
break;
}
}
}
Regexp.ReleaseBuffer();
}
PcreCompileData[NewID].pPcre = pcre_compile(WCHAR2UTF8(Regexp).GetData(), PCRE_UTF8 | PCRE_NO_UTF8_CHECK | Flags, &Err, &ErrOffs, NULL);
if (PcreCompileData[NewID].pPcre) {
PcreCompileData[NewID].pExtra = NULL;
if (pcre_study)
PcreCompileData[NewID].pExtra = pcre_study(PcreCompileData[NewID].pPcre, 0, &Err);
}
else {
// Result += LogMessage(TranslateT("Syntax error in regexp\n%s\nat offset %d: %s."), (TCHAR*)Regexp, ErrOffs, (TCHAR*)ANSI2TCHAR(Err)) + _T("\n\n");
PcreCompileData[NewID].Pattern = Regexp;
}
}
else PcreCompileData[NewID].Pattern = Regexp;
return Result;
}
HMODULE LoadPcreLibrary(const char *szPath)
{
_ASSERT(szPath);
HMODULE hModule = LoadLibraryA(szPath);
if (!hModule)
{
return NULL;
}
*(FARPROC*)&pcre_config = GetProcAddress(hModule, "pcre_config");
*(FARPROC*)&pcre_compile = GetProcAddress(hModule, "pcre_compile");
*(FARPROC*)&pcre_exec = GetProcAddress(hModule, "pcre_exec");
*(FARPROC*)&pcre_study = GetProcAddress(hModule, "pcre_study");
*(FARPROC*)&pcre_free = *(FARPROC*)GetProcAddress(hModule, "pcre_free"); // pcre_free is a pointer to a variable containing pointer to the function %)
if (pcre_compile && pcre_exec && pcre_free)
{
int Utf8Supported = 0;
if (pcre_config)
{
pcre_config(PCRE_CONFIG_UTF8, &Utf8Supported);
}
if (Utf8Supported)
{
return hModule;
}
}
FreeLibrary(hModule);
return NULL;
}
void InitPcre()
{
_ASSERT(!hPcreDLL);
hPcreDLL = LoadPcreLibrary("pcre.dll");
if (!hPcreDLL)
{
hPcreDLL = LoadPcreLibrary("pcre3.dll");
}
if (!hPcreDLL)
{
char path[MAX_PATH];
GetModuleFileNameA(NULL, path, sizeof(path));
char *p = strrchr(path, '\\');
if (p)
{
strcpy(p + 1, "pcre.dll");
} else
{
strcpy(path, "pcre.dll");
}
hPcreDLL = LoadPcreLibrary(path);
if (!hPcreDLL)
{
if (p)
{
strcpy(p + 1, "pcre3.dll");
} else
{
strcpy(path, "pcre3.dll");
}
hPcreDLL = LoadPcreLibrary(path);
}
}
}
void UninitPcre()
{
if (hPcreDLL)
{
FreePcreCompileData();
FreeLibrary(hPcreDLL);
}
}
int PcreEnabled()
{
return (int)hPcreDLL;
}
int PcreCheck(TCString Str, int StartingID)
{ // StartingID specifies the pattern from which to start checking, i.e. the check starts from the next pattern after the one that has ID == StartingID
int I;
if (StartingID == -1)
{
I = 0;
} else
{
for (I = 0; I < PcreCompileData.GetSize(); I++)
{
if (PcreCompileData[I].ID == StartingID)
{
I++;
break;
}
}
}
for (; I < PcreCompileData.GetSize(); I++)
{
if (hPcreDLL && PcreCompileData[I].pPcre)
{
CHARARRAY Utf8Str = WCHAR2UTF8(Str);
int Res = pcre_exec(PcreCompileData[I].pPcre, PcreCompileData[I].pExtra, Utf8Str.GetData(), Utf8Str.GetSize() - 1, 0, PCRE_NOTEMPTY | PCRE_NO_UTF8_CHECK, NULL, 0);
if (Res >= 0)
{
return PcreCompileData[I].ID;
}
} else
{
if (_tcsstr(Str.ToLower(), PcreCompileData[I].Pattern.ToLower()))
{
return PcreCompileData[I].ID;
}
}
}
return -1;
}
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