// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// Common code useful to all crt0 variants. This is kept in the DLL to allow us to
// change it in future releases.
//
//
#include <e32std.h>
#include <e32base.h>
#include <estlib.h>
#include <unistd.h> // for chdir
#include <stdlib.h> // for calloc
#include <string.h> // for strdup
const TInt KMaxArgC=25;
static char* wcstombs_alloc (const wchar_t* aString)
{
if (aString==NULL)
return NULL;
size_t size = wcstombs(0, aString, 0);
char* buf = (char*)malloc(size * sizeof(char));
size = wcstombs(buf, aString, size);
if (size == (size_t) -1)
{
free(buf);
return NULL;
}
buf = (char*)realloc(buf, (size+1) * sizeof(char));
return buf;
}
#ifdef EKA2
static wchar_t* allocCommandLine(const TDesC& aPath)
{
TInt cmdLength = User::CommandLineLength()+1; // for zero termination
TText16* cmdbuf = (TText16*)malloc(cmdLength*sizeof(TText16));
if (cmdbuf==0)
return (wchar_t*)cmdbuf; // we are just doomed, so give up now
TPtr16 cmdline(cmdbuf, cmdLength);
User::CommandLine(cmdline);
// The .EXE recogniser supplies a command line which is the name of the file,
// followed by a space. This is usually not what's wanted, so remove the
// filename if it is an exact match for the start of the command line.
if (cmdline.Find(aPath)==0)
{
cmdline.Delete(0, aPath.Length());
}
cmdline.ZeroTerminate();
return (wchar_t*)cmdbuf;
}
#else//EKA2
static wchar_t* allocCommandLine(const TDesC& aPath)
{
RProcess me;
TInt cmdLength = me.CommandLineLength()+1; // for zero termination
TText16* cmdbuf = (TText16*)malloc(cmdLength*sizeof(TText16));
if (cmdbuf==0)
return (wchar_t*)cmdbuf; // we are just doomed, so give up now
TPtr16 cmdline(cmdbuf, cmdLength);
me.CommandLine(cmdline);
// The .EXE recogniser supplies a command line which is the name of the file,
// followed by a space. This is usually not what's wanted, so remove the
// filename if it is an exact match for the start of the command line.
if (cmdline.Find(aPath)==0)
{
cmdline.Delete(0, aPath.Length());
}
cmdline.ZeroTerminate();
return (wchar_t*)cmdbuf;
}
#endif//EKA2
EXPORT_C void __crt0(int& argc, char**& argv, char**& envp)
{
// Find out the filename for argv[0]
TBuf16<KMaxFileName+1> exepath(RProcess().FileName());
// Sort out argc/argv, creating an array of pointers into a copy of
// the commandline.
wchar_t* cmdbuf = allocCommandLine(exepath);
char* cmd = wcstombs_alloc(cmdbuf);
free(cmdbuf);
char* filename = wcstombs_alloc((const wchar_t *)exepath.PtrZ());
argv = (char**)calloc(KMaxArgC, sizeof(char*));
// Check for memory allocation failures.
if (argv==0 || cmd==0 || filename== 0)
{
// Free any memory that could have been allocated before returning.
free(cmd);
free(filename);
return; // it's basically doomed at this point anyway
}
// Split the command line into the separate arguments
// Follow the stdarg.c rules in the Win32 runtime, namely
// 1. space and tab are whitespace separators, except inside "..." pairs
// 2. strings of \ are literal unless followed by " (see below)
// 3. a pair of "" in a quoted string is a literal "
const char KSpace= ' ';
const char KTab = '\t';
const char KQuote= '"';
const char KSlash= '\\';
argv[0]=filename;
argc = 1;
char *q = cmd;
const char* p = cmd;
FOREVER
{
char c;
TInt quoted=0;
// skip leading whitespace
do
c=*p++;
while (c && (c==KSpace || c==KTab));
// update the argv,argc
if (c=='\0' || argc>=KMaxArgC)
break;
argv[argc] = q;
argc++;
// copy the argument from p to q
for (;c!='\0';c=*p++)
{
// The UNC filenames format used, e.g. \\host\dir\file
// Hence the rather odd rules: for N>=0
// 2N+1 slash + " => N slash + literal "
// 2N slash + " => N slash, start/end quoted substring
// N slash + ? => N slash + ?
int slashcount=0;
while (c==KSlash)
{
*q++=c; // copy the slashes (might be too many)
slashcount++;
c=*p++;
}
if (c=='\0')
break;
if (c==KQuote)
{
q-=(slashcount-(slashcount/2)); // slashes followed by quote - adjust
if (slashcount&1)
{
*q++=c; // literal quote
continue;
}
if (quoted && *p==KQuote)
{
p++;
*q++=c; // "" inside quoted section = literal quote
continue;
}
quoted=!quoted;
continue;
}
if (!quoted && (c==KSpace || c==KTab))
break;
*q++=c;
}
*q++='\0'; // terminate the copy
if (c=='\0')
break; // end of command line
}
// sort out the environment
envp=0;
}
EXPORT_C void __crt0(int& argc, wchar_t**& wargv, wchar_t**& wenvp)
{
// Find out the filename for argv[0]
TBuf16<KMaxFileName+1> exepath(RProcess().FileName());
// Sort out argc/argv, creating an array of pointers into a copy of
// the commandline.
wchar_t* cmd = allocCommandLine(exepath);
wchar_t* filename = wcsdup((const wchar_t *)exepath.PtrZ());
wargv = (wchar_t**)calloc(KMaxArgC, sizeof(wchar_t*));
// Check for memory allocation failures.
if (wargv==0 || cmd==0 || filename== 0)
{
// Free any memory that could have been allocated before returning.
free(cmd);
free(filename);
return; // it's basically doomed at this point anyway
}
// Split the command line into the separate arguments
// Follow the stdarg.c rules in the Win32 runtime, namely
// 1. space and tab are whitespace separators, except inside "..." pairs
// 2. strings of \ are literal unless followed by " (see below)
// 3. a pair of "" in a quoted string is a literal "
const wchar_t KSpace= L' ';
const wchar_t KTab = L'\t';
const wchar_t KQuote= L'"';
const wchar_t KSlash= L'\\';
wargv[0]=filename;
argc = 1;
wchar_t *q = cmd;
wchar_t *p = cmd;
FOREVER
{
wchar_t c;
TInt quoted=0;
// skip leading whitespace
do
c=*p++;
while (c && (c==KSpace || c==KTab));
// update the argv,argc
if (c=='\0' || argc>=KMaxArgC)
break;
wargv[argc] = q;
argc++;
// copy the argument from p to q
for (;c!=L'\0';c=*p++)
{
// The UNC filenames format used, e.g. \\host\dir\file
// Hence the rather odd rules: for N>=0
// 2N+1 slash + " => N slash + literal "
// 2N slash + " => N slash, start/end quoted substring
// N slash + ? => N slash + ?
int slashcount=0;
while (c==KSlash)
{
*q++=c; // copy the slashes (might be too many)
slashcount++;
c=*p++;
}
if (c==L'\0')
break;
if (c==KQuote)
{
q-=(slashcount-(slashcount/2)); // slashes followed by quote - adjust
if (slashcount&1)
{
*q++=c; // literal quote
continue;
}
if (quoted && *p==KQuote)
{
p++;
*q++=c; // "" inside quoted section = literal quote
continue;
}
quoted=!quoted;
continue;
}
if (!quoted && (c==KSpace || c==KTab))
break;
*q++=c;
}
*q++=L'\0'; // terminate the copy
if (c==L'\0')
break; // end of command line
}
// sort out the environment
wenvp=0;
}