qmm/CDLLMod.cpp at master · thecybermind/qmm · GitHub

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/*
QMM - Q3 MultiMod
Copyright 2004-2024
https://github.com/thecybermind/qmm/
3-clause BSD license: https://opensource.org/license/bsd-3-clause

Created By:
    Kevin Masterson < cybermind@gmail.com >

*/

#include <string.h>
#include "osdef.h"
#include "qmm.h"
#include "CModMgr.h"
#include "CEngineMgr.h"
#include "game_api.h"
#include "qmmapi.h"
#include "CDLL.h"
#include "CDLLMod.h"
#include "util.h"

CDLLMod::CDLLMod() {
	memset(this->file, 0, sizeof(this->file));
}

CDLLMod::~CDLLMod() {
	this->dll.Unload();
}

// - file is either the full path or relative to the install directory
//homepath shit is all handled in CModMgr::LoadMod()
int CDLLMod::LoadMod(const char* file) {
	if (!file || !*file)
		return 0;

	strncpy(this->file, file, sizeof(this->file));

	//load dll
	int x = this->dll.Load(this->file);

	//file not found
	if (!x) {
		ENG_SYSCALL(ENG_MSG(QMM_G_PRINT), vaf("[QMM] ERROR: CDLLMod::LoadMod(\"%s\"): Unable to load mod file: %s\n", file, dlerror()));
		return 0;
	} else if (x == -1) {
		ENG_SYSCALL(ENG_MSG(QMM_G_PRINT), vaf("[QMM] ERROR: CDLLMod::LoadMod(\"%s\"): Unable to load mod file: module already loaded\n", file));
		return 0;
	}

	//locate dllEntry() function or fail
	if ((this->pfndllEntry = (mod_dllEntry_t)this->dll.GetProc("dllEntry")) == NULL) {
		ENG_SYSCALL(ENG_MSG(QMM_G_PRINT), vaf("[QMM] ERROR: CDLLMod::LoadMod(\"%s\"): Unable to locate dllEntry() mod entry point\n", file));
		return 0;
	}

	//locate vmMain() function or fail
	if ((this->pfnvmMain = (mod_vmMain_t)this->dll.GetProc("vmMain")) == NULL) {
		ENG_SYSCALL(ENG_MSG(QMM_G_PRINT), vaf("[QMM] ERROR: CDLLMod::LoadMod(\"%s\"): Unable to locate vmMain() mod entry point\n", file));
		return 0;
	}

	//call mod's dllEntry
	this->pfndllEntry(g_ModMgr->QMM_SysCall());

	return 1;
}

int CDLLMod::vmMain(int cmd, int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7, int arg8, int arg9, int arg10, int arg11) {
	return this->pfnvmMain ? this->pfnvmMain(cmd, arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11) : 0;
}

int CDLLMod::IsVM() {
	return 0;
}

const char* CDLLMod::File() {
	return this->file[0] ? this->file : NULL;
}

int CDLLMod::GetBase() {
	return 0;
}

void CDLLMod::Status() {
	ENG_SYSCALL(ENG_MSG(QMM_G_PRINT), vaf("[QMM] dllEntry() offset: %p\n", this->pfndllEntry));
	ENG_SYSCALL(ENG_MSG(QMM_G_PRINT), vaf("[QMM] vmMain() offset: %p\n", this->pfnvmMain));
}