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Diffstat (limited to 'includes/expr.h')
| -rw-r--r-- | includes/expr.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/includes/expr.h b/includes/expr.h new file mode 100644 index 00000000..18d0cc65 --- /dev/null +++ b/includes/expr.h @@ -0,0 +1,48 @@ +/* + * HardInfo - Displays System Information + * Copyright (C) 2003-2007 L. A. F. Pereira <l@tia.mat.br> + * + * 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, version 2 or later. + * + * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef __EXPR_H__ +#define __EXPR_H__ + +typedef struct _MathToken MathToken; + +typedef enum { + TOKEN_OPERATOR, + TOKEN_VARIABLE, + TOKEN_VALUE +} MathTokenType; + +struct _MathToken { + union { + gfloat value; + gchar op; + } val; + MathTokenType type; +}; + +#define math_postfix_free math_infix_free + +GSList *math_infix_to_postfix(GSList *infix); +void math_infix_free(GSList *infix, gboolean free_tokens); + +GSList *math_string_to_infix(gchar *string); +GSList *math_string_to_postfix(gchar *string); + +gfloat math_postfix_eval(GSList *postfix, gfloat at_value); +gfloat math_string_eval(gchar *string, gfloat at_value); + +#endif /* __EXPR_H__ */ |