+/*
+===========================================================================
+Copyright (C) 1997-2006 Id Software, Inc.
+
+This file is part of Quake 2 Tools source code.
+
+Quake 2 Tools source code is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Quake 2 Tools source code is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Quake 2 Tools source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+
+// scriplib.c
+
+#include "cmdlib.h"
+#include "scriplib.h"
+
+/*
+=============================================================================
+
+ PARSING STUFF
+
+=============================================================================
+*/
+
+typedef struct
+{
+ char filename[1024];
+ char *buffer,*script_p,*end_p;
+ int line;
+} script_t;
+
+#define MAX_INCLUDES 8
+script_t scriptstack[MAX_INCLUDES];
+script_t *script;
+int scriptline;
+
+char token[MAXTOKEN];
+qboolean endofscript;
+qboolean tokenready; // only true if UnGetToken was just called
+
+/*
+==============
+AddScriptToStack
+==============
+*/
+void AddScriptToStack (char *filename)
+{
+ int size;
+
+ script++;
+ if (script == &scriptstack[MAX_INCLUDES])
+ Error ("script file exceeded MAX_INCLUDES");
+ strcpy (script->filename, ExpandPath (filename) );
+
+ size = LoadFile (script->filename, (void **)&script->buffer);
+
+ printf ("entering %s\n", script->filename);
+
+ script->line = 1;
+
+ script->script_p = script->buffer;
+ script->end_p = script->buffer + size;
+}
+
+
+/*
+==============
+LoadScriptFile
+==============
+*/
+void LoadScriptFile (char *filename)
+{
+ script = scriptstack;
+ AddScriptToStack (filename);
+
+ endofscript = false;
+ tokenready = false;
+}
+
+
+/*
+==============
+ParseFromMemory
+==============
+*/
+void ParseFromMemory (char *buffer, int size)
+{
+ script = scriptstack;
+ script++;
+ if (script == &scriptstack[MAX_INCLUDES])
+ Error ("script file exceeded MAX_INCLUDES");
+ strcpy (script->filename, "memory buffer" );
+
+ script->buffer = buffer;
+ script->line = 1;
+ script->script_p = script->buffer;
+ script->end_p = script->buffer + size;
+
+ endofscript = false;
+ tokenready = false;
+}
+
+
+/*
+==============
+UnGetToken
+
+Signals that the current token was not used, and should be reported
+for the next GetToken. Note that
+
+GetToken (true);
+UnGetToken ();
+GetToken (false);
+
+could cross a line boundary.
+==============
+*/
+void UnGetToken (void)
+{
+ tokenready = true;
+}
+
+
+qboolean EndOfScript (qboolean crossline)
+{
+ if (!crossline)
+ Error ("Line %i is incomplete\n",scriptline);
+
+ if (!strcmp (script->filename, "memory buffer"))
+ {
+ endofscript = true;
+ return false;
+ }
+
+ free (script->buffer);
+ if (script == scriptstack+1)
+ {
+ endofscript = true;
+ return false;
+ }
+ script--;
+ scriptline = script->line;
+ printf ("returning to %s\n", script->filename);
+ return GetToken (crossline);
+}
+
+/*
+==============
+GetToken
+==============
+*/
+qboolean GetToken (qboolean crossline)
+{
+ char *token_p;
+
+ if (tokenready) // is a token allready waiting?
+ {
+ tokenready = false;
+ return true;
+ }
+
+ if (script->script_p >= script->end_p)
+ return EndOfScript (crossline);
+
+//
+// skip space
+//
+skipspace:
+ while (*script->script_p <= 32)
+ {
+ if (script->script_p >= script->end_p)
+ return EndOfScript (crossline);
+ if (*script->script_p++ == '\n')
+ {
+ if (!crossline)
+ Error ("Line %i is incomplete\n",scriptline);
+ scriptline = script->line++;
+ }
+ }
+
+ if (script->script_p >= script->end_p)
+ return EndOfScript (crossline);
+
+ // ; # // comments
+ if (*script->script_p == ';' || *script->script_p == '#'
+ || ( script->script_p[0] == '/' && script->script_p[1] == '/') )
+ {
+ if (!crossline)
+ Error ("Line %i is incomplete\n",scriptline);
+ while (*script->script_p++ != '\n')
+ if (script->script_p >= script->end_p)
+ return EndOfScript (crossline);
+ goto skipspace;
+ }
+
+ // /* */ comments
+ if (script->script_p[0] == '/' && script->script_p[1] == '*')
+ {
+ if (!crossline)
+ Error ("Line %i is incomplete\n",scriptline);
+ script->script_p+=2;
+ while (script->script_p[0] != '*' && script->script_p[1] != '/')
+ {
+ script->script_p++;
+ if (script->script_p >= script->end_p)
+ return EndOfScript (crossline);
+ }
+ script->script_p += 2;
+ goto skipspace;
+ }
+
+//
+// copy token
+//
+ token_p = token;
+
+ if (*script->script_p == '"')
+ {
+ // quoted token
+ script->script_p++;
+ while (*script->script_p != '"')
+ {
+ *token_p++ = *script->script_p++;
+ if (script->script_p == script->end_p)
+ break;
+ if (token_p == &token[MAXTOKEN])
+ Error ("Token too large on line %i\n",scriptline);
+ }
+ script->script_p++;
+ }
+ else // regular token
+ while ( *script->script_p > 32 && *script->script_p != ';')
+ {
+ *token_p++ = *script->script_p++;
+ if (script->script_p == script->end_p)
+ break;
+ if (token_p == &token[MAXTOKEN])
+ Error ("Token too large on line %i\n",scriptline);
+ }
+
+ *token_p = 0;
+
+ if (!strcmp (token, "$include"))
+ {
+ GetToken (false);
+ AddScriptToStack (token);
+ return GetToken (crossline);
+ }
+
+ return true;
+}
+
+
+/*
+==============
+TokenAvailable
+
+Returns true if there is another token on the line
+==============
+*/
+qboolean TokenAvailable (void)
+{
+ char *search_p;
+
+ search_p = script->script_p;
+
+ if (search_p >= script->end_p)
+ return false;
+
+ while ( *search_p <= 32)
+ {
+ if (*search_p == '\n')
+ return false;
+ search_p++;
+ if (search_p == script->end_p)
+ return false;
+
+ }
+
+ if (*search_p == ';')
+ return false;
+
+ return true;
+}
+
+
projects / xonotic / netradiant.git / blobdiff