quakeforge/libs/util/gib_process.c

91 lines
2 KiB
C

/*
#FILENAME#
#DESCRIPTION#
Copyright (C) 2002 #AUTHOR#
Author: #AUTHOR#
Date: #DATE#
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#include <string.h>
#include <ctype.h>
#include "QF/dstring.h"
#include "QF/cbuf.h"
#include "QF/cvar.h"
#include "exp.h"
void
GIB_Process_Variable (struct dstring_s *dstr)
{
int i;
cvar_t *var;
for (i = 0; dstr->str[i] == '$'; i++);
i--;
for (; i >= 0; i--) {
var = Cvar_FindVar (dstr->str+i+1);
if (!var)
return;
dstr->str[i] = 0;
dstring_appendstr (dstr, var->string);
}
}
void
GIB_Process_Variables_All (struct dstring_s *token)
{
int i, n;
dstring_t *var = dstring_newstr ();
for (i = 0; token->str[i]; i++) {
if (token->str[i] == '$') {
for (n = 1; token->str[i+n] == '$'; n++); // get past $s
for (; isalnum(token->str[i+n]); n++); // find end of var
dstring_insert (var, 0, token->str+i, n); // extract it
GIB_Process_Variable (var);
dstring_replace (token, i, n, var->str, strlen(var->str));
i += strlen (var->str) - 1;
dstring_clearstr (var);
}
}
}
int
GIB_Process_Math (struct dstring_s *token)
{
double value;
value = EXP_Evaluate (token->str);
if (EXP_ERROR) {
// FIXME: Give real error descriptions
Cbuf_Error ("math", "Expression \"%s\" caused error %i", token->str, EXP_ERROR);
return -1;
} else {
dstring_clearstr (token);
dsprintf (token, "%.10g", value);
}
return 0;
}