The DOOM Classic for iPhone 1.0 source as released on November 3, 2009

code/iphone/cvar.c

@@ -0,0 +1,374 @@
+/*
+
+	Copyright (C) 2004 Michael Liebscher
+	Copyright (C) 1997-2001 Id Software, Inc.
+
+	This program is free software; you can redistribute it and/or
+	modify it under the terms of the GNU General  License
+	as published by the Free Software Foundation; either version 2
+	of the License, or (at your option) any later version.
+
+	This program 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  License for more details.
+
+	You should have received a copy of the GNU General  License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#include "../doomiphone.h"
+
+
+cvar_t	*cvar_vars;
+
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_FindVar -Return cvar;
+ 
+ Parameters: var_name -[in] Name of cvar to lookup.
+ 
+ Returns: NULL if cvar not found, otherwise returns the cvar.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+cvar_t *Cvar_FindVar( const char *var_name )
+{
+	cvar_t	*var;
+	int hashid;
+
+	hashid = HashString( var_name );
+	
+	for( var = cvar_vars ; var ; var = var->next )
+	{
+		if( hashid == var->hashid && !strcasecmp( var_name, var->name ) )
+		{
+			return var;
+		}
+	}
+
+	return NULL;
+}
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_VariableValue -Get value of cvar.
+ 
+ Parameters: var_name -[in] Name of cvar to get value.
+ 
+ Returns: 0 if not found, other the value of the cvar.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+ float Cvar_VariableValue( const char *var_name )
+{
+	cvar_t	*var;
+	
+	var = Cvar_FindVar( var_name );	
+	if( ! var )
+	{
+		return 0;
+	}
+
+	return (float)atof( var->string );
+}
+
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_VariableString -Get cvar variable as string.
+ 
+ Parameters: var_name -[in] Name of cvar to get value.
+ 
+ Returns: Blank string on error, otherwise value string.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+ char *Cvar_VariableString( const char *var_name )
+{
+	cvar_t *var;
+	
+	var = Cvar_FindVar( var_name );
+	if( ! var )
+	{
+		return "";
+	}
+
+	return var->string;
+}
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_CompleteVariable -Complete cvar string name.
+ 
+ Parameters: partial -[in] Partial name of string to look up.
+ 
+ Returns: NULL if partial string not found, otherwise the complete
+			string name.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+ char *Cvar_CompleteVariable( const char *partial )
+{
+	cvar_t	*cvar;
+	size_t	len;
+	
+	len = strlen( partial );
+	
+	if( ! len )
+	{
+		return NULL;
+	}	
+
+//
+// Check partial match.
+//
+	for( cvar = cvar_vars ; cvar ; cvar = cvar->next )
+	{
+		if( ! strncmp( partial, cvar->name, len ) )
+		{
+			return cvar->name;
+		}
+	}
+
+	return NULL;
+}
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_Get -Get cvar structure.
+ 
+ Parameters:
+			var_name -[in] the name of the cvar variable.
+			var_value -[in] string value of the cvar variable.
+			flags -[in] see CVARFlags for more information.
+ 
+ Returns: NULL on error, otherwise valid pointer to cvar_t structure.
+ 
+ Notes: 
+	If the variable already exists, the value will not be set and
+	the flags will be or'ed.
+-----------------------------------------------------------------------------
+*/
+cvar_t *Cvar_Get( const char *var_name, const char *var_value, CVARFlags flags ) {
+	cvar_t	*var;
+	
+	var = Cvar_FindVar( var_name );
+	if( var ) {
+		var->flags |= flags;
+		return var;
+	}
+
+	if( ! var_value ) {
+		return NULL;
+	}
+
+	var = malloc( sizeof( *var ) );
+	var->name = strdup( var_name );
+	var->string = strdup( var_value );
+	var->defaultString = strdup( var_value );
+	var->hashid = HashString( var_name );
+	var->modified = true;
+	var->value = (float)atof( var->string );
+
+	// link the variable in
+	var->next = cvar_vars;
+	cvar_vars = var;
+
+	var->flags = flags;
+
+	return var;
+}
+
+/*
+-----------------------------------------------------------------------------
+ Function: 
+ 
+ Parameters:
+ 
+ Returns:
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+void Cvar_Set( const char *var_name, const char *value ) {
+	cvar_t	*var;
+
+	var = Cvar_FindVar( var_name );
+	if( ! var ) {
+		Com_Printf( "Cvar '%s' doesn't exist\n", var_name );
+		return;
+	}
+
+	if( var->flags & CVAR_NOSET ) {
+		Com_Printf( "%s is write protected.\n", var_name );
+		return;
+	}
+
+
+	if( ! strcmp( value, var->string ) ) {
+		return;		// not changed
+	}
+
+	var->modified = true;
+
+	free( var->string );	// free the old value string
+	
+	var->string = strdup( value );
+	var->value = (float)atof( var->string );
+}
+
+
+/*
+-----------------------------------------------------------------------------
+ Function: 
+ 
+ Parameters:
+ 
+ Returns:
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+ void Cvar_SetValue( const char *var_name, float value )
+{
+	char	val[ 32 ];
+
+	if( value == (int)value )
+	{
+		snprintf( val, sizeof( val ), "%i", (int)value );
+	}
+	else
+	{
+		snprintf( val, sizeof( val ), "%f", value );
+	}
+	
+	Cvar_Set( var_name, val );
+}
+
+
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_Command -Handles variable inspection and changing from 
+						the console.
+ 
+ Parameters: Nothing.
+ 
+ Returns: false if variable not found, otherwise true.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+boolean Cvar_Command( void )
+{
+	cvar_t	*v;
+
+// check variables
+	v = Cvar_FindVar( Cmd_Argv( 0 ) );
+	if( ! v )
+	{
+		return false;
+	}
+		
+// perform a variable print or set
+	if( Cmd_Argc() == 1 )
+	{
+		Com_Printf( "\"%s\" is \"%s\"\n", v->name, v->string );
+		return true;
+	}
+
+	Cvar_Set( v->name, Cmd_Argv( 1 ) );
+	return true;
+}
+
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_WriteVariables -Appends lines containing "set variable value"
+								for all variables with the archive flag set
+								to true.
+ 
+ Parameters:
+ 
+ Returns: Nothing.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+ void Cvar_WriteVariables( const char *path )
+{
+	cvar_t	*var;
+	char	buffer[1024];
+	FILE	*f;
+
+	f = fopen( path, "a" );
+	for( var = cvar_vars ; var ; var = var->next )
+	{
+		if( var->flags & CVAR_ARCHIVE )
+		{
+			snprintf( buffer, sizeof( buffer ), "set %s %s\n", var->name, var->string );
+			fprintf( f, "%s", buffer );
+		}
+	}
+	fclose( f );
+}
+
+/*
+-----------------------------------------------------------------------------
+ Function: Cvar_List_f -Print all cvars to the console.
+ 
+ Parameters: Nothing.
+ 
+ Returns: Nothing.
+ 
+ Notes: 
+
+-----------------------------------------------------------------------------
+*/
+void Cvar_List_f( void )
+{
+	cvar_t	*var;
+	int		i;
+	
+	i = 0;
+	for( var = cvar_vars ; var ; var = var->next, ++i )
+	{
+		if( var->flags & CVAR_ARCHIVE )
+		{
+			Com_Printf ("*");
+		}
+		else
+		{
+			Com_Printf (" ");
+		}
+		
+		
+		Com_Printf (" %s \"%s\"\n", var->name, var->string);
+	}
+	
+	Com_Printf ("%i cvars\n", i);
+}
+
+
+void Cvar_Reset_f( void ) {
+	for( cvar_t *var = cvar_vars ; var ; var = var->next ) {
+		Cvar_Set( var->name, var->defaultString );
+	}
+}
+