da0a160371
--HG-- extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401345
322 lines
7.8 KiB
C++
322 lines
7.8 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourcePawn
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* Copyright (C) 2004-2007 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#include <stdio.h>
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#include <string.h>
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#include "sp_vm_function.h"
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/********************
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* FUNCTION CALLING *
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********************/
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void CFunction::Set(uint32_t code_addr, IPluginContext *plugin, funcid_t id)
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{
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m_codeaddr = code_addr;
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m_pContext = plugin;
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m_curparam = 0;
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m_errorstate = SP_ERROR_NONE;
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m_Invalid = false;
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m_pCtx = plugin ? plugin->GetContext() : NULL;
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m_FnId = id;
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}
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bool CFunction::IsRunnable()
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{
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return ((m_pCtx->flags & SPFLAG_PLUGIN_PAUSED) != SPFLAG_PLUGIN_PAUSED);
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}
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int CFunction::CallFunction(const cell_t *params, unsigned int num_params, cell_t *result)
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{
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if (!IsRunnable())
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{
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return SP_ERROR_NOT_RUNNABLE;
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}
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while (num_params--)
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{
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m_pContext->PushCell(params[num_params]);
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}
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return m_pContext->Execute(m_codeaddr, result);
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}
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IPluginContext *CFunction::GetParentContext()
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{
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return m_pContext;
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}
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CFunction::CFunction(uint32_t code_addr, IPluginContext *plugin, funcid_t id) :
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m_codeaddr(code_addr), m_pContext(plugin), m_curparam(0),
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m_errorstate(SP_ERROR_NONE), m_FnId(id)
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{
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m_Invalid = false;
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if (plugin)
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{
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m_pCtx = plugin->GetContext();
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}
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}
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int CFunction::PushCell(cell_t cell)
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{
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if (m_curparam >= SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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m_info[m_curparam].marked = false;
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m_params[m_curparam] = cell;
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m_curparam++;
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return SP_ERROR_NONE;
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}
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int CFunction::PushCellByRef(cell_t *cell, int flags)
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{
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return PushArray(cell, 1, flags);
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}
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int CFunction::PushFloat(float number)
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{
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cell_t val = *(cell_t *)&number;
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return PushCell(val);
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}
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int CFunction::PushFloatByRef(float *number, int flags)
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{
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return PushCellByRef((cell_t *)number, flags);
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}
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int CFunction::PushArray(cell_t *inarray, unsigned int cells, int copyback)
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{
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if (m_curparam >= SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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ParamInfo *info = &m_info[m_curparam];
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info->flags = inarray ? copyback : 0;
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info->marked = true;
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info->size = cells;
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info->str.is_sz = false;
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info->orig_addr = inarray;
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m_curparam++;
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return SP_ERROR_NONE;
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}
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int CFunction::PushString(const char *string)
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{
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return _PushString(string, SM_PARAM_STRING_COPY, 0, strlen(string)+1);
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}
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int CFunction::PushStringEx(char *buffer, size_t length, int sz_flags, int cp_flags)
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{
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return _PushString(buffer, sz_flags, cp_flags, length);
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}
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int CFunction::_PushString(const char *string, int sz_flags, int cp_flags, size_t len)
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{
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if (m_curparam >= SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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ParamInfo *info = &m_info[m_curparam];
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info->marked = true;
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info->orig_addr = (cell_t *)string;
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info->flags = cp_flags;
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info->size = len;
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info->str.sz_flags = sz_flags;
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info->str.is_sz = true;
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m_curparam++;
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return SP_ERROR_NONE;
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}
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void CFunction::Cancel()
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{
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if (!m_curparam)
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{
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return;
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}
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m_errorstate = SP_ERROR_NONE;
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m_curparam = 0;
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}
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int CFunction::Execute(cell_t *result)
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{
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int err = SP_ERROR_NONE;
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if (!IsRunnable())
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{
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m_errorstate = SP_ERROR_NOT_RUNNABLE;
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}
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if (m_errorstate != SP_ERROR_NONE)
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{
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err = m_errorstate;
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Cancel();
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return err;
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}
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//This is for re-entrancy!
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cell_t temp_params[SP_MAX_EXEC_PARAMS];
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ParamInfo temp_info[SP_MAX_EXEC_PARAMS];
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unsigned int numparams = m_curparam;
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unsigned int i;
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bool docopies = true;
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if (numparams)
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{
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//Save the info locally, then reset it for re-entrant calls.
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memcpy(temp_info, m_info, numparams * sizeof(ParamInfo));
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}
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m_curparam = 0;
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/* Browse the parameters and build arrays */
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for (i=0; i<numparams; i++)
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{
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/* Is this marked as an array? */
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if (temp_info[i].marked)
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{
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if (!temp_info[i].str.is_sz)
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{
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/* Allocate a normal/generic array */
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if ((err=m_pContext->HeapAlloc(temp_info[i].size,
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&(temp_info[i].local_addr),
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&(temp_info[i].phys_addr)))
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!= SP_ERROR_NONE)
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{
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break;
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}
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if (temp_info[i].orig_addr)
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{
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memcpy(temp_info[i].phys_addr, temp_info[i].orig_addr, sizeof(cell_t) * temp_info[i].size);
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}
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} else {
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/* Calculate cells required for the string */
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size_t cells = (temp_info[i].size + sizeof(cell_t) - 1) / sizeof(cell_t);
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/* Allocate the buffer */
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if ((err=m_pContext->HeapAlloc(cells,
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&(temp_info[i].local_addr),
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&(temp_info[i].phys_addr)))
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!= SP_ERROR_NONE)
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{
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break;
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}
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/* Copy original string if necessary */
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if ((temp_info[i].str.sz_flags & SM_PARAM_STRING_COPY) && (temp_info[i].orig_addr != NULL))
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{
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if (temp_info[i].str.sz_flags & SM_PARAM_STRING_UTF8)
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{
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if ((err=m_pContext->StringToLocalUTF8(temp_info[i].local_addr,
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temp_info[i].size,
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(const char *)temp_info[i].orig_addr,
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NULL))
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!= SP_ERROR_NONE)
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{
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break;
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}
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} else {
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if ((err=m_pContext->StringToLocal(temp_info[i].local_addr,
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temp_info[i].size,
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(const char *)temp_info[i].orig_addr))
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!= SP_ERROR_NONE)
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{
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break;
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}
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}
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}
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} /* End array/string calculation */
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/* Update the pushed parameter with the byref local address */
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temp_params[i] = temp_info[i].local_addr;
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} else {
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/* Just copy the value normally */
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temp_params[i] = m_params[i];
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}
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}
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/* Make the call if we can */
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if (err == SP_ERROR_NONE)
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{
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if ((err = CallFunction(temp_params, numparams, result)) != SP_ERROR_NONE)
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{
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docopies = false;
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}
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} else {
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docopies = false;
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}
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/* i should be equal to the last valid parameter + 1 */
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while (i--)
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{
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if (!temp_info[i].marked)
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{
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continue;
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}
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if (docopies && (temp_info[i].flags & SM_PARAM_COPYBACK))
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{
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if (temp_info[i].orig_addr)
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{
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if (temp_info[i].str.is_sz)
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{
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memcpy(temp_info[i].orig_addr, temp_info[i].phys_addr, temp_info[i].size);
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} else {
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if (temp_info[i].size == 1)
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{
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*temp_info[i].orig_addr = *(temp_info[i].phys_addr);
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} else {
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memcpy(temp_info[i].orig_addr,
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temp_info[i].phys_addr,
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temp_info[i].size * sizeof(cell_t));
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}
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}
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}
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}
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if ((err=m_pContext->HeapPop(temp_info[i].local_addr)) != SP_ERROR_NONE)
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{
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return err;
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}
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}
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return err;
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}
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funcid_t CFunction::GetFunctionID()
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{
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return m_FnId;
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}
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