first

Quake/cfgfile.c

@@ -0,0 +1,175 @@
+/*
+ * cfgfile.c -- misc reads from the config file
+ *
+ * Copyright (C) 2008-2012  O.Sezer <sezero@users.sourceforge.net>
+ *
+ * This program 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.
+ *
+ * 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 Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "quakedef.h"
+
+
+static fshandle_t		*cfg_file;
+
+/*
+===================
+CFG_ReadCvars
+
+used for doing early reads from config.cfg searching the list
+of given cvar names for the user-set values. a temporary
+solution until we merge a better cvar system.
+the num_vars argument must be the exact number of strings in the
+array, otherwise I have nothing against going out of bounds.
+===================
+*/
+void CFG_ReadCvars (const char **vars, int num_vars)
+{
+	char	buff[1024], *tmp;
+	int			i, j;
+
+	if (!cfg_file || num_vars < 1)
+		return;
+
+	j = 0;
+
+	do {
+		i = 0;
+		memset (buff, 0, sizeof(buff));
+		// we expect a line in the format that Cvar_WriteVariables
+		// writes to the config file. although I'm trying to be as
+		// much cautious as possible, if the user screws it up by
+		// editing it, it's his fault.
+		if (FS_fgets(buff, sizeof(buff), cfg_file))
+		{
+			// remove end-of-line characters
+			while (buff[i])
+			{
+				if (buff[i] == '\r' || buff[i] == '\n')
+					buff[i] = '\0';
+				// while we're here, replace tabs with spaces
+				if (buff[i] == '\t')
+					buff[i] = ' ';
+				i++;
+			}
+			// go to the last character
+			while (buff[i] == 0 && i > 0)
+				i--;
+			// remove trailing spaces
+			while (i > 0)
+			{
+				if (buff[i] == ' ')
+				{
+					buff[i] = '\0';
+					i--;
+				}
+				else
+					break;
+			}
+
+			// the line must end with a quotation mark
+			if (buff[i] != '\"')
+				continue;
+			buff[i] = '\0';
+
+			for (i = 0; i < num_vars && vars[i]; i++)
+			{
+				// look for the cvar name + one space
+				tmp = strstr(buff, va("%s ",vars[i]));
+				if (tmp != buff)
+					continue;
+				// locate the first quotation mark
+				tmp = strchr(buff, '\"');
+				if (tmp)
+				{
+					Cvar_Set (vars[i], tmp + 1);
+					j++;
+					break;
+				}
+			}
+		}
+
+		if (j == num_vars)
+			break;
+
+	} while (!FS_feof(cfg_file) && !FS_ferror(cfg_file));
+
+	FS_rewind (cfg_file);
+}
+
+/*
+===================
+CFG_ReadCvarOverrides
+
+convenience function, reading the "+" command line override
+values of cvars in the given list. doesn't do anything with
+the config file.
+===================
+*/
+void CFG_ReadCvarOverrides (const char **vars, int num_vars)
+{
+	char	buff[64];
+	int		i, j;
+
+	if (num_vars < 1)
+		return;
+
+	buff[0] = '+';
+
+	for (i = 0; i < num_vars; i++)
+	{
+		q_strlcpy (&buff[1], vars[i], sizeof(buff) - 1);
+		j = COM_CheckParm(buff);
+		if (j != 0 && j < com_argc - 1)
+		{
+			if (com_argv[j + 1][0] != '-' && com_argv[j + 1][0] != '+')
+				Cvar_Set(vars[i], com_argv[j + 1]);
+		}
+	}
+}
+
+void CFG_CloseConfig (void)
+{
+	if (cfg_file)
+	{
+		FS_fclose(cfg_file);
+		Z_Free(cfg_file);
+		cfg_file = NULL;
+	}
+}
+
+int CFG_OpenConfig (const char *cfg_name)
+{
+	FILE	*f;
+	long		length;
+	qboolean	pak;
+
+	CFG_CloseConfig ();
+
+	length = (long) COM_FOpenFile (cfg_name, &f, NULL);
+	pak = file_from_pak;
+	if (length == -1)
+		return -1;
+
+	cfg_file = (fshandle_t *) Z_Malloc(sizeof(fshandle_t));
+	cfg_file->file = f;
+	cfg_file->start = ftell(f);
+	cfg_file->pos = 0;
+	cfg_file->length = length;
+	cfg_file->pak = pak;
+
+	return 0;
+}
+