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/*
* AUTHOR
* N. Nielsen
*
* LICENSE
* This software is in the public domain.
*
* The software is provided "as is", without warranty of any kind,
* express or implied, including but not limited to the warranties
* of merchantability, fitness for a particular purpose, and
* noninfringement. In no event shall the author(s) be liable for any
* claim, damages, or other liability, whether in an action of
* contract, tort, or otherwise, arising from, out of, or in connection
* with the software or the use or other dealings in the software.
*
* SUPPORT
* Send bug reports to: <nielsen@memberwebs.com>
*/
#include <stdafx.h>
#include "lib/rep.h"
#include "common/binfile.h"
#include "common/repfile.h"
#include "Droplet.h"
// (Con|De)struction: --------------------------------------------
Droplet::Droplet()
{
m_keepBackups = false;
memset(&m_ctx, 0, sizeof(m_ctx));
}
Droplet::~Droplet()
{
repFree(&m_ctx);
}
// All error handling jumps to 'cleanup' where wrapping up loose
// ends is done
#define RETURN(v) { ret = v; goto cleanup; }
// save: ---------------------------------------------------
// Saves a droplet to a file. The file must already exist
// and must be an executable
bool Droplet::save(LPCTSTR fileName)
{
HANDLE update = NULL;
void* data = NULL;
BFILE h = NULL;
bool ret = true;
{
if(!m_ctx.script.ops)
RETURN(false);
// Make the rep binfile
bfval val;
BFILE h = bfStartMem(NULL, 0, BF_REALLOC);
if(!h) RETURN(false);
// Write out the headers
repfWriteHeader(h);
// Write to it now
if(m_ctx.block != 0)
bfWriteInt(h, REPVAL_BUFSIZE, m_ctx.block);
bfWriteInt(h, DROPVAL_BACKUPS, m_keepBackups ? 1 : 0);
// Write the script out
val.id = REPVAL_SCRIPT;
val.len = m_ctx.script.len;
val.type = BINTYPE_DATA;
bfWriteValue(h, &val, m_ctx.script.ops);
if(!m_title.empty())
bfWriteString(h, DROPVAL_TITLE, m_title.c_str());
// Done
bfWriteEnd(h);
if(bfError(h)) RETURN(false);
size_t len = bfCount(h);
data = bfInternal(h);
bfClose(h);
h = NULL;
// Now actually modify the EXE
update = BeginUpdateResource(fileName, FALSE);
if(!update) RETURN(false);
if(!UpdateResource(update, DROP_RESOURCE_TYPE, DROP_RESOURCE_ID,
MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL), data, len)
|| !EndUpdateResource(update, FALSE))
RETURN(false);
update = NULL;
}
cleanup:
while(data)
{
free(data);
if(h == NULL)
break;
data = bfInternal(h);
bfClose(h);
h = NULL;
}
if(update)
EndUpdateResource(update, TRUE);
return true;
}
// load: ---------------------------------------------------------------
// Load a droplet from a file
bool Droplet::load(LPCTSTR fileName)
{
HMODULE module = LoadLibrary(fileName);
if(!module)
return false;
bool ret = load(GetModuleHandle(fileName));
FreeLibrary(module);
return ret;
}
// load: ---------------------------------------------------------------
// Load a droplet from a loaded module
bool Droplet::load(HMODULE module)
{
bool ret = true;
BFILE h = NULL;
{
// In case we're called twice
repFree(&m_ctx);
// Load the resource
HRSRC hRsrc = FindResourceEx(module, DROP_RESOURCE_TYPE, DROP_RESOURCE_ID,
MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL));
if(!hRsrc) RETURN(false);
HGLOBAL hGlobal = LoadResource(module, hRsrc);
if(!hGlobal) RETURN(false);
void* data = LockResource(hGlobal);
if(!data) RETURN(false);
::SetLastError(0);
// And now read it
h = bfStartMem(data, SizeofResource(module, hRsrc), 0);
if(!h) RETURN(false);
// Check the format
if(!repfReadHeader(h))
RETURN(false);
bfval val;
while(bfReadValueInfo(h, &val))
{
switch(val.id)
{
case REPVAL_BUFSIZE:
bfReadValueData(h, &val, &(m_ctx.block));
continue;
case DROPVAL_BACKUPS:
{
long value;
bfReadValueData(h, &val, &value);
m_keepBackups = value == 0 ? false : true;
}
continue;
case REPVAL_SCRIPT:
{
// Script must have some length
if(val.len == 0)
RETURN(false);
m_ctx.script.ops = (byte*)malloc(val.len);
if(!m_ctx.script.ops)
RETURN(false);
bfReadValueData(h, &val, m_ctx.script.ops);
m_ctx.script.len = val.len;
}
continue;
case DROPVAL_TITLE:
{
bfReadValueData(h, &val, m_title.get_buffer(val.len));
m_title.release_buffer();
}
continue;
}
bfSkipValueData(h, &val);
}
}
cleanup:
if(h)
bfClose(h);
return ret;
}
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