mirror of
https://github.com/DrBeef/Raze.git
synced 2024-12-15 15:11:01 +00:00
1032 lines
23 KiB
C++
1032 lines
23 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 "sc_man.h"
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#include "cmdlib.h"
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#include "templates.h"
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#include "printf.h"
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#include "name.h"
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#include "v_text.h"
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#include "templates.h"
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#include "filesystem/filesystem.h"
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// MACROS ------------------------------------------------------------------
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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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// EXTERNAL DATA DECLARATIONS ----------------------------------------------
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// PUBLIC DATA DEFINITIONS -------------------------------------------------
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// PRIVATE DATA DEFINITIONS ------------------------------------------------
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// CODE --------------------------------------------------------------------
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//==========================================================================
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//
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// FScanner Constructor
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//
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//==========================================================================
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FScanner::FScanner()
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{
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ScriptOpen = false;
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}
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//==========================================================================
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//
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// FScanner Destructor
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//
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//==========================================================================
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FScanner::~FScanner()
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{
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// Humm... Nothing to do in here.
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}
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//==========================================================================
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//
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// FScanner Copy Constructor
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//
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//==========================================================================
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FScanner::FScanner(const FScanner &other)
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{
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ScriptOpen = false;
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*this = other;
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}
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//==========================================================================
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//
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// FScanner :: operator =
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//
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//==========================================================================
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FScanner &FScanner::operator=(const FScanner &other)
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{
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if (this == &other)
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{
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return *this;
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}
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if (!other.ScriptOpen)
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{
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Close();
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return *this;
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}
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// Copy protected members
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ScriptOpen = true;
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ScriptName = other.ScriptName;
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ScriptBuffer = other.ScriptBuffer;
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ScriptPtr = other.ScriptPtr;
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ScriptEndPtr = other.ScriptEndPtr;
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AlreadyGot = other.AlreadyGot;
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AlreadyGotLine = other.AlreadyGotLine;
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LastGotToken = other.LastGotToken;
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LastGotPtr = other.LastGotPtr;
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LastGotLine = other.LastGotLine;
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CMode = other.CMode;
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Escape = other.Escape;
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StateMode = other.StateMode;
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StateOptions = other.StateOptions;
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// Copy public members
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if (other.String == other.StringBuffer)
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{
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memcpy(StringBuffer, other.StringBuffer, sizeof(StringBuffer));
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BigStringBuffer = "";
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String = StringBuffer;
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}
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else
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{
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// Past practice means the string buffer must be writeable, which
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// removes some of the benefit from using an FString to store
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// the big string buffer.
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BigStringBuffer = other.BigStringBuffer;
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String = BigStringBuffer.LockBuffer();
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}
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StringLen = other.StringLen;
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TokenType = other.TokenType;
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Number = other.Number;
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Float = other.Float;
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Name = other.Name;
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Line = other.Line;
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End = other.End;
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Crossed = other.Crossed;
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return *this;
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}
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//==========================================================================
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//
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// FScanner :: Open
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//
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//==========================================================================
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void FScanner::Open (const char *name)
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{
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auto fr = fileSystem.OpenFileReader(name, 0);
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if (!fr.isOpen())
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{
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I_Error("Could not find script lump '%s'\n", name);
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}
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Close();
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auto data = fr.ReadPadded(1);
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ScriptBuffer = data;
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ScriptName = name;
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//LumpNum = lump;
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PrepareScript();
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}
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//==========================================================================
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//
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// FScanner :: Open
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//
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//==========================================================================
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FScanner::FScanner(int lump)
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{
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if ((unsigned)lump >= fileSystem.GetNumEntries())
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{
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I_Error("Invalid file index %d\n", lump);
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}
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Close();
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auto data = fileSystem.GetFileData(lump, 1);
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ScriptBuffer = data;
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ScriptName = fileSystem.GetFileName(lump);
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LumpNum = lump;
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PrepareScript();
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}
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//==========================================================================
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//
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// FScanner :: OpenFile
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//
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// Loads a script from a file. Uses new/delete for memory allocation.
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//
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//==========================================================================
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void FScanner::OpenFile (const char *name)
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{
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Close ();
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FileReader fr;
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if (!fr.OpenFile(name)) return;
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auto data = fr.ReadPadded(1);
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ScriptBuffer = data;
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ScriptName = name; // This is used for error messages so the full file name is preferable
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LumpNum = -1;
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PrepareScript ();
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}
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//==========================================================================
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//
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// FScanner :: OpenMem
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//
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// Prepares a script that is already in memory for parsing. The memory is
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// copied, so you can do whatever you want with it after opening it.
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//
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//==========================================================================
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void FScanner::OpenMem (const char *name, const char *buffer, int size)
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{
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OpenString(name, FString(buffer, size));
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}
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//==========================================================================
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//
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// FScanner :: OpenString
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//
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// Like OpenMem, but takes a string directly.
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//
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//==========================================================================
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void FScanner::OpenString (const char *name, FString buffer)
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{
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Close ();
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ScriptBuffer = buffer;
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ScriptName = name;
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LumpNum = -1;
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PrepareScript ();
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}
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//==========================================================================
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//
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// FScanner :: 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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void FScanner::PrepareScript ()
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{
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// The scanner requires the file to end with a '\n', so add one if
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// it doesn't already.
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if (ScriptBuffer.Len() == 0 || ScriptBuffer[ScriptBuffer.Len() - 1] != '\n')
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{
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// If the last character in the buffer is a null character, change
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// it to a newline. Otherwise, append a newline to the end.
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if (ScriptBuffer.Len() > 0 && ScriptBuffer[ScriptBuffer.Len() - 1] == '\0')
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{
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ScriptBuffer.LockBuffer()[ScriptBuffer.Len() - 1] = '\n';
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ScriptBuffer.UnlockBuffer();
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}
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else
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{
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ScriptBuffer += '\n';
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}
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}
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ScriptPtr = &ScriptBuffer[0];
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ScriptEndPtr = &ScriptBuffer[ScriptBuffer.Len()];
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Line = 1;
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End = false;
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ScriptOpen = true;
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String = StringBuffer;
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AlreadyGot = false;
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LastGotToken = false;
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LastGotPtr = NULL;
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LastGotLine = 1;
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CMode = false;
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Escape = true;
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StateMode = 0;
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StateOptions = false;
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StringBuffer[0] = '\0';
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BigStringBuffer = "";
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}
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//==========================================================================
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//
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// FScanner :: Close
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//
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//==========================================================================
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void FScanner::Close ()
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{
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ScriptOpen = false;
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ScriptBuffer = "";
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BigStringBuffer = "";
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StringBuffer[0] = '\0';
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String = StringBuffer;
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}
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//==========================================================================
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//
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// FScanner :: 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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const FScanner::SavedPos FScanner::SavePos ()
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{
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SavedPos pos;
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CheckOpen ();
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if (End)
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{
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pos.SavedScriptPtr = NULL;
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}
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else
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{
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pos.SavedScriptPtr = ScriptPtr;
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}
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pos.SavedScriptLine = Line;
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return pos;
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}
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//==========================================================================
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//
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// FScanner :: 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 FScanner::RestorePos (const FScanner::SavedPos &pos)
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{
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if (pos.SavedScriptPtr)
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{
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ScriptPtr = pos.SavedScriptPtr;
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Line = pos.SavedScriptLine;
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End = false;
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}
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else
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{
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End = true;
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}
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AlreadyGot = false;
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LastGotToken = false;
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Crossed = false;
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}
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//==========================================================================
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//
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// FScanner :: isText
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//
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// Checks if this is a text file.
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//
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//==========================================================================
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bool FScanner::isText()
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{
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for(unsigned int i=0;i<ScriptBuffer.Len();i++)
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{
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int c = ScriptBuffer[i];
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if (c < ' ' && c != '\n' && c != '\r' && c != '\t') 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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// FScanner :: 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 FScanner::SetCMode (bool cmode)
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{
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CMode = cmode;
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}
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//==========================================================================
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//
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// FScanner :: SetEscape
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//
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// Turns the escape sequence \" in strings on or off. If it's off, that
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// means you can't include quotation marks inside strings.
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//
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//==========================================================================
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void FScanner::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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// FScanner :: SetStateMode
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//
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// Enters state mode. This mode is very permissive for identifiers, which
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// it returns as TOK_NonWhitespace. The only character sequences that are
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// not returned as such are these:
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//
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// * stop
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// * wait
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// * fail
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// * loop
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// * goto - Automatically exits state mode after it's seen.
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// * :
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// * ;
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// * } - Automatically exits state mode after it's seen.
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//
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// Quoted strings are returned as TOK_NonWhitespace, minus the quotes. Once
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// two consecutive sequences of TOK_NonWhitespace have been encountered
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// (which would be the state's sprite and frame specifiers), nearly normal
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// processing resumes, with the exception that various identifiers
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// used for state options will be returned as tokens and not identifiers.
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// This ends once a ';' or '{' character is encountered.
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//
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//==========================================================================
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void FScanner::SetStateMode(bool stately)
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{
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StateMode = stately ? 2 : 0;
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StateOptions = stately;
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}
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//==========================================================================
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//
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// FScanner::ScanString
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//
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// Set tokens true if you want TokenType to be set.
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//
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//==========================================================================
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bool FScanner::ScanString (bool tokens)
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{
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const char *marker, *tok;
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bool return_val;
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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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if (!tokens || LastGotToken)
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{
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return true;
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}
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ScriptPtr = LastGotPtr;
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Line = LastGotLine;
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}
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Crossed = false;
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if (ScriptPtr >= ScriptEndPtr)
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{
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End = true;
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return false;
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}
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LastGotPtr = ScriptPtr;
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LastGotLine = Line;
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// In case the generated scanner does not use marker, avoid compiler warnings.
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marker;
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#include "sc_man_scanner.h"
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LastGotToken = tokens;
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return return_val;
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}
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//==========================================================================
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//
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// FScanner :: GetString
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//
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//==========================================================================
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bool FScanner::GetString ()
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{
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return ScanString (false);
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}
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//==========================================================================
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//
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// FScanner :: MustGetString
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//
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//==========================================================================
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void FScanner::MustGetString (void)
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{
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if (FScanner::GetString() == false)
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{
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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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// FScanner :: MustGetStringName
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//
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//==========================================================================
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void FScanner::MustGetStringName (const char *name)
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{
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MustGetString ();
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if (Compare (name) == false)
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{
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ScriptError ("Expected '%s', got '%s'.", name, String);
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}
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}
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//==========================================================================
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//
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// FScanner :: 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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//==========================================================================
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bool FScanner::CheckString (const char *name)
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{
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if (GetString ())
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{
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if (Compare (name))
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{
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return true;
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}
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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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// FScanner :: GetToken
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//
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// Sets sc_Float, sc_Number, and sc_Name based on sc_TokenType.
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//
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//==========================================================================
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bool FScanner::GetToken ()
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{
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if (ScanString (true))
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{
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if (TokenType == TK_NameConst)
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{
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Name = FName(String);
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}
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else if (TokenType == TK_IntConst)
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{
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char *stopper;
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// Check for unsigned
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if (String[StringLen - 1] == 'u' || String[StringLen - 1] == 'U' ||
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String[StringLen - 2] == 'u' || String[StringLen - 2] == 'U')
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{
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TokenType = TK_UIntConst;
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BigNumber = (int64_t)strtoull(String, &stopper, 0);
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Number = (int)clamp<int64_t>(BigNumber, 0, UINT_MAX);
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Float = (unsigned)Number;
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}
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else
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{
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BigNumber = strtoll(String, &stopper, 0);
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Number = (int)clamp<int64_t>(BigNumber, INT_MIN, INT_MAX);
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Float = Number;
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}
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}
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else if (TokenType == TK_FloatConst)
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{
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char *stopper;
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Float = strtod(String, &stopper);
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}
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else if (TokenType == TK_StringConst)
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{
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StringLen = strbin(String);
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}
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return true;
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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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// FScanner :: MustGetAnyToken
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//
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//==========================================================================
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void FScanner::MustGetAnyToken (void)
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{
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if (GetToken () == false)
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{
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ScriptError ("Missing token (unexpected end of file).");
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}
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}
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//==========================================================================
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//
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// FScanner :: TokenMustBe
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//
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//==========================================================================
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void FScanner::TokenMustBe (int token)
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{
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if (TokenType != token)
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{
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FString tok1 = TokenName(token);
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FString tok2 = TokenName(TokenType, String);
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ScriptError ("Expected %s but got %s instead.", tok1.GetChars(), tok2.GetChars());
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}
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}
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//==========================================================================
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//
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// FScanner :: MustGetToken
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//
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//==========================================================================
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void FScanner::MustGetToken (int token)
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{
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MustGetAnyToken ();
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TokenMustBe(token);
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}
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//==========================================================================
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//
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// FScanner :: CheckToken
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//
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// Checks if the next token matches the specified token. 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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//==========================================================================
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bool FScanner::CheckToken (int token)
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{
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if (GetToken ())
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{
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if (TokenType == token)
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{
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return true;
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}
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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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// FScanner :: GetNumber
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//
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//==========================================================================
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|
|
bool FScanner::GetNumber ()
|
|
{
|
|
char *stopper;
|
|
|
|
CheckOpen();
|
|
if (GetString())
|
|
{
|
|
if (strcmp (String, "MAXINT") == 0)
|
|
{
|
|
Number = INT_MAX;
|
|
}
|
|
else
|
|
{
|
|
BigNumber = strtoll(String, &stopper, 0);
|
|
Number = (int)clamp<int64_t>(BigNumber, INT_MIN, INT_MAX);
|
|
if (*stopper != 0)
|
|
{
|
|
ScriptError ("SC_GetNumber: Bad numeric constant \"%s\".", String);
|
|
}
|
|
}
|
|
Float = Number;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: MustGetNumber
|
|
//
|
|
//==========================================================================
|
|
|
|
void FScanner::MustGetNumber ()
|
|
{
|
|
if (GetNumber() == false)
|
|
{
|
|
ScriptError ("Missing integer (unexpected end of file).");
|
|
}
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: CheckNumber
|
|
//
|
|
// similar to GetNumber but ungets the token if it isn't a number
|
|
// and does not print an error
|
|
//
|
|
//==========================================================================
|
|
|
|
bool FScanner::CheckNumber ()
|
|
{
|
|
char *stopper;
|
|
|
|
if (GetString())
|
|
{
|
|
if (String[0] == 0)
|
|
{
|
|
UnGet();
|
|
return false;
|
|
}
|
|
else if (strcmp (String, "MAXINT") == 0)
|
|
{
|
|
BigNumber = INT64_MAX;
|
|
Number = INT_MAX;
|
|
}
|
|
else
|
|
{
|
|
BigNumber = strtoll (String, &stopper, 0);
|
|
Number = (int)clamp<int64_t>(BigNumber, INT_MIN, INT_MAX);
|
|
if (*stopper != 0)
|
|
{
|
|
UnGet();
|
|
return false;
|
|
}
|
|
}
|
|
Float = Number;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: CheckFloat
|
|
//
|
|
// [GRB] Same as SC_CheckNumber, only for floats
|
|
//
|
|
//==========================================================================
|
|
|
|
bool FScanner::CheckFloat ()
|
|
{
|
|
char *stopper;
|
|
|
|
if (GetString())
|
|
{
|
|
if (String[0] == 0)
|
|
{
|
|
UnGet();
|
|
return false;
|
|
}
|
|
|
|
Float = strtod (String, &stopper);
|
|
if (*stopper != 0)
|
|
{
|
|
UnGet();
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: GetFloat
|
|
//
|
|
//==========================================================================
|
|
|
|
bool FScanner::GetFloat ()
|
|
{
|
|
char *stopper;
|
|
|
|
CheckOpen ();
|
|
if (GetString())
|
|
{
|
|
Float = strtod (String, &stopper);
|
|
if (*stopper != 0)
|
|
{
|
|
ScriptError ("SC_GetFloat: Bad numeric constant \"%s\".", String);
|
|
}
|
|
Number = (int)Float;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: MustGetFloat
|
|
//
|
|
//==========================================================================
|
|
|
|
void FScanner::MustGetFloat ()
|
|
{
|
|
if (GetFloat() == false)
|
|
{
|
|
ScriptError ("Missing floating-point number (unexpected end of file).");
|
|
}
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: UnGet
|
|
//
|
|
// Assumes there is a valid string in String.
|
|
//
|
|
//==========================================================================
|
|
|
|
void FScanner::UnGet ()
|
|
{
|
|
AlreadyGot = true;
|
|
AlreadyGotLine = LastGotLine; // in case of an error we want the line of the last token.
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: MatchString
|
|
//
|
|
// Returns the index of the first match to String from the passed
|
|
// array of strings, or -1 if not found.
|
|
//
|
|
//==========================================================================
|
|
|
|
int FScanner::MatchString (const char * const *strings, size_t stride)
|
|
{
|
|
int i;
|
|
|
|
assert(stride % sizeof(const char*) == 0);
|
|
|
|
stride /= sizeof(const char*);
|
|
|
|
for (i = 0; *strings != NULL; i++)
|
|
{
|
|
if (Compare (*strings))
|
|
{
|
|
return i;
|
|
}
|
|
strings += stride;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: MustMatchString
|
|
//
|
|
//==========================================================================
|
|
|
|
int FScanner::MustMatchString (const char * const *strings, size_t stride)
|
|
{
|
|
int i;
|
|
|
|
i = MatchString (strings, stride);
|
|
if (i == -1)
|
|
{
|
|
ScriptError ("Unknown keyword '%s'", String);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: Compare
|
|
//
|
|
//==========================================================================
|
|
|
|
bool FScanner::Compare (const char *text)
|
|
{
|
|
return (stricmp (text, String) == 0);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: TokenName
|
|
//
|
|
// Returns the name of a token.
|
|
//
|
|
//==========================================================================
|
|
|
|
FString FScanner::TokenName (int token, const char *string)
|
|
{
|
|
static const char *const names[] =
|
|
{
|
|
#define xx(sym,str) str,
|
|
#include "sc_man_tokens.h"
|
|
};
|
|
|
|
FString work;
|
|
|
|
if (token > ' ' && token < 256)
|
|
{
|
|
work = '\'';
|
|
work += token;
|
|
work += '\'';
|
|
}
|
|
else if (token >= TK_Identifier && token < TK_LastToken)
|
|
{
|
|
work = names[token - TK_Identifier];
|
|
if (string != NULL && token >= TK_Identifier && token <= TK_FloatConst)
|
|
{
|
|
work += ' ';
|
|
char quote = (token == TK_StringConst) ? '"' : '\'';
|
|
work += quote;
|
|
work += string;
|
|
work += quote;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FString work;
|
|
work.Format ("Unknown(%d)", token);
|
|
return work;
|
|
}
|
|
return work;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner::GetMessageLine
|
|
//
|
|
//==========================================================================
|
|
|
|
int FScanner::GetMessageLine()
|
|
{
|
|
return AlreadyGot? AlreadyGotLine : Line;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner::ScriptError
|
|
//
|
|
//==========================================================================
|
|
|
|
void FScanner::ScriptError (const char *message, ...)
|
|
{
|
|
FString 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.GetChars(),
|
|
AlreadyGot? AlreadyGotLine : Line, composed.GetChars());
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner::ScriptMessage
|
|
//
|
|
//==========================================================================
|
|
|
|
void FScanner::ScriptMessage (const char *message, ...)
|
|
{
|
|
FString composed;
|
|
|
|
if (message == NULL)
|
|
{
|
|
composed = "Bad syntax.";
|
|
}
|
|
else
|
|
{
|
|
va_list arglist;
|
|
va_start (arglist, message);
|
|
composed.VFormat (message, arglist);
|
|
va_end (arglist);
|
|
}
|
|
|
|
Printf (TEXTCOLOR_RED "Script error, \"%s\" line %d:\n" TEXTCOLOR_RED "%s\n", ScriptName.GetChars(),
|
|
AlreadyGot? AlreadyGotLine : Line, composed.GetChars());
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FScanner :: CheckOpen
|
|
//
|
|
//==========================================================================
|
|
|
|
void FScanner::CheckOpen()
|
|
{
|
|
if (ScriptOpen == false)
|
|
{
|
|
I_Error ("SC_ call before SC_Open().");
|
|
}
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
// ParseHex
|
|
//
|
|
//==========================================================================
|
|
|
|
int ParseHex(const char* hex)
|
|
{
|
|
const char* str;
|
|
int num;
|
|
|
|
num = 0;
|
|
str = hex;
|
|
|
|
while (*str)
|
|
{
|
|
num <<= 4;
|
|
if (*str >= '0' && *str <= '9')
|
|
num += *str - '0';
|
|
else if (*str >= 'a' && *str <= 'f')
|
|
num += 10 + *str - 'a';
|
|
else if (*str >= 'A' && *str <= 'F')
|
|
num += 10 + *str - 'A';
|
|
else {
|
|
Printf("Bad hex number: %s\n", hex);
|
|
return 0;
|
|
}
|
|
str++;
|
|
}
|
|
|
|
return num;
|
|
}
|
|
|
|
|