mirror of
https://github.com/ZDoom/gzdoom.git
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737 lines
16 KiB
C++
737 lines
16 KiB
C++
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//**************************************************************************
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//**
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//** sc_man.c : Heretic 2 : Raven Software, Corp.
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//**
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//** $RCSfile: sc_man.c,v $
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//** $Revision: 1.3 $
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//** $Date: 96/01/06 03:23:43 $
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//** $Author: bgokey $
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//**
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//**************************************************************************
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// HEADER FILES ------------------------------------------------------------
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#include <string.h>
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#include <stdlib.h>
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#include "doomtype.h"
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#include "i_system.h"
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#include "sc_man.h"
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#include "w_wad.h"
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#include "cmdlib.h"
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#include "m_misc.h"
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// MACROS ------------------------------------------------------------------
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#define MAX_STRING_SIZE 4096
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#define ASCII_COMMENT (';')
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#define CPP_COMMENT ('/')
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#define C_COMMENT ('*')
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#define ASCII_QUOTE ('"')
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#define LUMP_SCRIPT 1
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#define FILE_ZONE_SCRIPT 2
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#define NORMAL_STOPCHARS "{}|="
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#define CMODE_STOPCHARS "`~!@#$%^&*(){}[]/=\?+|;:<>,."
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#define CMODE_STOPCHARS_NODECIMAL "`~!@#$%^&*(){}[]/=\?+|;:<>,"
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// TYPES -------------------------------------------------------------------
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// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
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// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
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// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
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static void SC_PrepareScript (void);
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static void CheckOpen (void);
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// EXTERNAL DATA DECLARATIONS ----------------------------------------------
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// PUBLIC DATA DEFINITIONS -------------------------------------------------
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char *sc_String;
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int sc_StringLen;
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int sc_Number;
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float sc_Float;
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int sc_Line;
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BOOL sc_End;
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BOOL sc_Crossed;
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BOOL sc_FileScripts = false;
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char *sc_ScriptsDir = "";
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// PRIVATE DATA DEFINITIONS ------------------------------------------------
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static char ScriptName[128];
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static char *ScriptBuffer;
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static char *ScriptPtr;
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static char *ScriptEndPtr;
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static char StringBuffer[MAX_STRING_SIZE];
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static bool ScriptOpen = false;
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static int ScriptSize;
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static bool AlreadyGot = false;
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static bool FreeScript = false;
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static char *SavedScriptPtr;
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static int SavedScriptLine;
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static bool CMode;
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static bool Escape=true;
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// CODE --------------------------------------------------------------------
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//==========================================================================
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//
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// SC_Open
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//
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//==========================================================================
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void SC_Open (const char *name)
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{
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SC_OpenLumpNum (Wads.GetNumForName (name), name);
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}
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//==========================================================================
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//
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// SC_OpenFile
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//
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// Loads a script (from a file). Uses the new/delete memory allocator for
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// memory allocation and de-allocation.
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//
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//==========================================================================
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void SC_OpenFile (const char *name)
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{
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SC_Close ();
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ScriptSize = M_ReadFile (name, (byte **)&ScriptBuffer);
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ExtractFileBase (name, ScriptName);
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FreeScript = true;
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SC_PrepareScript ();
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}
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//==========================================================================
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//
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// SC_OpenMem
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//
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// Prepares a script that is already in memory for parsing. The caller is
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// responsible for freeing it, if needed.
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//
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//==========================================================================
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void SC_OpenMem (const char *name, char *buffer, int size)
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{
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SC_Close ();
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ScriptSize = size;
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ScriptBuffer = buffer;
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strcpy (ScriptName, name);
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FreeScript = false;
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SC_PrepareScript ();
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}
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//==========================================================================
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//
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// SC_OpenLumpNum
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//
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// Loads a script (from the WAD files).
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//
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//==========================================================================
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void SC_OpenLumpNum (int lump, const char *name)
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{
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SC_Close ();
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ScriptSize = Wads.LumpLength (lump);
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ScriptBuffer = new char[ScriptSize];
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Wads.ReadLump (lump, ScriptBuffer);
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strcpy (ScriptName, name);
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FreeScript = true;
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SC_PrepareScript ();
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}
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//==========================================================================
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//
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// SC_PrepareScript
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//
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// Prepares a script for parsing.
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//
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//==========================================================================
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static void SC_PrepareScript (void)
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{
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ScriptPtr = ScriptBuffer;
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ScriptEndPtr = ScriptPtr + ScriptSize;
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sc_Line = 1;
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sc_End = false;
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ScriptOpen = true;
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sc_String = StringBuffer;
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AlreadyGot = false;
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SavedScriptPtr = NULL;
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CMode = false;
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}
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//==========================================================================
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//
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// SC_Close
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//
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//==========================================================================
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void SC_Close (void)
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{
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if (ScriptOpen)
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{
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if (ScriptBuffer)
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{
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if (FreeScript)
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{
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delete[] ScriptBuffer;
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}
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}
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ScriptBuffer = NULL;
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ScriptOpen = false;
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}
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}
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//==========================================================================
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//
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// SC_SavePos
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//
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// Saves the current script location for restoration later
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//
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//==========================================================================
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void SC_SavePos (void)
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{
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CheckOpen ();
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if (sc_End)
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{
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SavedScriptPtr = NULL;
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}
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else
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{
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SavedScriptPtr = ScriptPtr;
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SavedScriptLine = sc_Line;
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}
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}
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//==========================================================================
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//
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// SC_RestorePos
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//
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// Restores the previously saved script location
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//
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//==========================================================================
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void SC_RestorePos (void)
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{
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if (SavedScriptPtr)
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{
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ScriptPtr = SavedScriptPtr;
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sc_Line = SavedScriptLine;
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sc_End = false;
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AlreadyGot = false;
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}
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}
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//==========================================================================
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//
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// SC_SetCMode
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//
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// Enables/disables C mode. In C mode, more characters are considered to
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// be whole words than in non-C mode.
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//
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//==========================================================================
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void SC_SetCMode (bool cmode)
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{
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CMode = cmode;
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}
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void SC_SetEscape (bool esc)
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{
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Escape = esc;
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}
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//==========================================================================
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//
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// SC_GetString
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//
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//==========================================================================
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BOOL SC_GetString ()
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{
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char *text;
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BOOL foundToken;
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CheckOpen();
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if (AlreadyGot)
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{
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AlreadyGot = false;
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return true;
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}
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foundToken = false;
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sc_Crossed = false;
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if (ScriptPtr >= ScriptEndPtr)
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{
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sc_End = true;
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return false;
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}
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while (foundToken == false)
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{
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while (ScriptPtr < ScriptEndPtr && *ScriptPtr <= ' ')
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{
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if (*ScriptPtr++ == '\n')
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{
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sc_Line++;
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sc_Crossed = true;
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}
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}
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if (ScriptPtr >= ScriptEndPtr)
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{
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sc_End = true;
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return false;
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}
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if ((CMode || *ScriptPtr != ASCII_COMMENT) &&
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!(ScriptPtr[0] == CPP_COMMENT && ScriptPtr < ScriptEndPtr - 1 &&
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(ScriptPtr[1] == CPP_COMMENT || ScriptPtr[1] == C_COMMENT)))
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{ // Found a token
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foundToken = true;
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}
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else
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{ // Skip comment
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if (ScriptPtr[0] == CPP_COMMENT && ScriptPtr[1] == C_COMMENT)
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{ // C comment
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while (ScriptPtr[0] != C_COMMENT || ScriptPtr[1] != CPP_COMMENT)
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{
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if (ScriptPtr[0] == '\n')
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{
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sc_Line++;
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sc_Crossed = true;
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}
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ScriptPtr++;
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if (ScriptPtr >= ScriptEndPtr - 1)
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{
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sc_End = true;
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return false;
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}
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}
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ScriptPtr += 2;
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}
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else
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{ // C++ comment
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while (*ScriptPtr++ != '\n')
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{
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if (ScriptPtr >= ScriptEndPtr)
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{
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sc_End = true;
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return false;
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}
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}
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sc_Line++;
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sc_Crossed = true;
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}
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}
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}
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text = sc_String;
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if (*ScriptPtr == ASCII_QUOTE)
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{ // Quoted string
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ScriptPtr++;
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while (*ScriptPtr != ASCII_QUOTE)
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{
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// Hack alert: Do not allow escaped quotation marks when parsing DECORATE!
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if (*ScriptPtr=='\\' && ScriptPtr[1]=='"' && Escape)
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{
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*text++ = '"';
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ScriptPtr+=2;
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}
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else
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{
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*text++ = *ScriptPtr++;
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}
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if (ScriptPtr == ScriptEndPtr
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|| text == &sc_String[MAX_STRING_SIZE-1])
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{
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break;
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}
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}
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ScriptPtr++;
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}
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else
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{ // Normal string
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static const char *stopchars;
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if (CMode)
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{
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stopchars = CMODE_STOPCHARS;
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// '-' can be its own token, or it can be part of a negative number
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if (*ScriptPtr == '-')
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{
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*text++ = '-';
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ScriptPtr++;
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if (ScriptPtr < ScriptEndPtr && *ScriptPtr >= '0' && *ScriptPtr <= '9')
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{
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stopchars = CMODE_STOPCHARS_NODECIMAL;
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goto grabtoken;
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}
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goto gottoken;
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}
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else if (*ScriptPtr >= '0' && *ScriptPtr <= '9')
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{
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stopchars = CMODE_STOPCHARS_NODECIMAL;
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}
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else if (*ScriptPtr == '.' && ScriptPtr[1] >= '0' && ScriptPtr[1] <= '9')
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{
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stopchars = CMODE_STOPCHARS_NODECIMAL;
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}
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}
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else
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{
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stopchars = NORMAL_STOPCHARS;
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}
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if (strchr (stopchars, *ScriptPtr))
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{
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*text++ = *ScriptPtr++;
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// [GRB] Allow 2-char operators
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if (CMode && strchr ("&=|<>", *ScriptPtr))
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*text++ = *ScriptPtr++;
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}
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else
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{
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grabtoken:
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while ((*ScriptPtr > ' ') && (strchr (stopchars, *ScriptPtr) == NULL)
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&& (CMode || *ScriptPtr != ASCII_COMMENT)
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&& !(ScriptPtr[0] == CPP_COMMENT && (ScriptPtr < ScriptEndPtr - 1) &&
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(ScriptPtr[1] == CPP_COMMENT || ScriptPtr[1] == C_COMMENT)))
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{
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*text++ = *ScriptPtr++;
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if (ScriptPtr == ScriptEndPtr
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|| text == &sc_String[MAX_STRING_SIZE-1])
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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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}
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gottoken:
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*text = 0;
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sc_StringLen = text - sc_String;
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return true;
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}
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//==========================================================================
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//
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// SC_MustGetString
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//
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//==========================================================================
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void SC_MustGetString (void)
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{
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if (SC_GetString () == false)
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{
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SC_ScriptError ("Missing string (unexpected end of file).");
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}
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}
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//==========================================================================
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//
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// SC_MustGetStringName
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//
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//==========================================================================
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void SC_MustGetStringName (const char *name)
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{
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SC_MustGetString ();
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if (SC_Compare (name) == false)
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{
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SC_ScriptError ("Expected '%s', got '%s'.", name, sc_String);
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}
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}
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//==========================================================================
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//
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// SC_CheckString
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//
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// Checks if the next token matches the specified string. Returns true if
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// it does. If it doesn't, it ungets it and returns false.
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//==========================================================================
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bool SC_CheckString (const char *name)
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{
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if (SC_GetString ())
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{
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if (SC_Compare (name))
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{
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return true;
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}
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SC_UnGet ();
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}
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return false;
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}
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//==========================================================================
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//
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// SC_GetNumber
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//
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//==========================================================================
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BOOL SC_GetNumber (void)
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{
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char *stopper;
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CheckOpen ();
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if (SC_GetString())
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{
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if (strcmp (sc_String, "MAXINT") == 0)
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{
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sc_Number = INT_MAX;
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}
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else
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{
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sc_Number = strtol (sc_String, &stopper, 0);
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if (*stopper != 0)
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{
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SC_ScriptError ("SC_GetNumber: Bad numeric constant \"%s\".", sc_String);
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}
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}
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sc_Float = (float)sc_Number;
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return true;
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}
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else
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{
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return false;
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}
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}
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//==========================================================================
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//
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// SC_MustGetNumber
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//
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//==========================================================================
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void SC_MustGetNumber (void)
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{
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if (SC_GetNumber() == false)
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{
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SC_ScriptError ("Missing integer (unexpected end of file).");
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}
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}
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//==========================================================================
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//
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// SC_CheckNumber
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// similar to SC_GetNumber but ungets the token if it isn't a number
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// and does not print an error
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//
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//==========================================================================
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BOOL SC_CheckNumber (void)
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{
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char *stopper;
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//CheckOpen ();
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if (SC_GetString())
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{
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if (strcmp (sc_String, "MAXINT") == 0)
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{
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sc_Number = INT_MAX;
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}
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else
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{
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sc_Number = strtol (sc_String, &stopper, 0);
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if (*stopper != 0)
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{
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SC_UnGet();
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return false;
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}
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}
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sc_Float = (float)sc_Number;
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return true;
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}
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else
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{
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return false;
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}
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}
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//==========================================================================
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//
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// SC_GetFloat
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//
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//==========================================================================
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BOOL SC_GetFloat (void)
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{
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char *stopper;
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CheckOpen ();
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if (SC_GetString())
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{
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sc_Float = (float)strtod (sc_String, &stopper);
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if (*stopper != 0)
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{
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I_Error ("SC_GetFloat: Bad numeric constant \"%s\".\n"
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"Script %s, Line %d\n", sc_String, ScriptName, sc_Line);
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}
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sc_Number = (int)sc_Float;
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return true;
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}
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else
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{
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return false;
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}
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}
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//==========================================================================
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//
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// SC_MustGetFloat
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//
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//==========================================================================
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void SC_MustGetFloat (void)
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{
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if (SC_GetFloat() == false)
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{
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SC_ScriptError ("Missing floating-point number (unexpected end of file).");
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}
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}
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//==========================================================================
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//
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// SC_UnGet
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//
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// Assumes there is a valid string in sc_String.
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//
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//==========================================================================
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void SC_UnGet (void)
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{
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AlreadyGot = true;
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}
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//==========================================================================
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//
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// SC_Check
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//
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// Returns true if another token is on the current line.
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//
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//==========================================================================
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/*
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BOOL SC_Check(void)
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{
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char *text;
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CheckOpen();
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text = ScriptPtr;
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if(text >= ScriptEndPtr)
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{
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return false;
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}
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while(*text <= 32)
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{
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if(*text == '\n')
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{
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return false;
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}
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text++;
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if(text == ScriptEndPtr)
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{
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return false;
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}
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}
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if(*text == ASCII_COMMENT)
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{
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return false;
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}
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return true;
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}
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*/
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//==========================================================================
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//
|
|
// SC_MatchString
|
|
//
|
|
// Returns the index of the first match to sc_String from the passed
|
|
// array of strings, or -1 if not found.
|
|
//
|
|
//==========================================================================
|
|
|
|
int SC_MatchString (const char **strings)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; *strings != NULL; i++)
|
|
{
|
|
if (SC_Compare (*strings++))
|
|
{
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// SC_MustMatchString
|
|
//
|
|
//==========================================================================
|
|
|
|
int SC_MustMatchString (const char **strings)
|
|
{
|
|
int i;
|
|
|
|
i = SC_MatchString (strings);
|
|
if (i == -1)
|
|
{
|
|
SC_ScriptError (NULL);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// SC_Compare
|
|
//
|
|
//==========================================================================
|
|
|
|
BOOL SC_Compare (const char *text)
|
|
{
|
|
return (stricmp (text, sc_String) == 0);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// SC_ScriptError
|
|
//
|
|
//==========================================================================
|
|
|
|
void STACK_ARGS SC_ScriptError (const char *message, ...)
|
|
{
|
|
string composed;
|
|
|
|
if (message == NULL)
|
|
{
|
|
composed = "Bad syntax.";
|
|
}
|
|
else
|
|
{
|
|
va_list arglist;
|
|
va_start (arglist, message);
|
|
composed.VFormat (message, arglist);
|
|
va_end (arglist);
|
|
}
|
|
|
|
I_Error ("Script error, \"%s\" line %d:\n%s\n", ScriptName,
|
|
sc_Line, composed.GetChars());
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// CheckOpen
|
|
//
|
|
//==========================================================================
|
|
|
|
static void CheckOpen(void)
|
|
{
|
|
if (ScriptOpen == false)
|
|
{
|
|
I_FatalError ("SC_ call before SC_Open().");
|
|
}
|
|
}
|