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-rw-r--r--hardinfo/expr.c250
1 files changed, 0 insertions, 250 deletions
diff --git a/hardinfo/expr.c b/hardinfo/expr.c
deleted file mode 100644
index 32e303d7..00000000
--- a/hardinfo/expr.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * HardInfo - Displays System Information
- * Copyright (C) 2003-2007 Leandro A. F. Pereira <leandro@hardinfo.org>
- *
- * 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.
- *
- * 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
- */
-/*
- * This is only used to compute sensor values, hence the only variable supported is '@'.
- * The '`' operator (ln(x)) is not available, nor multi-line formulas.
- */
-
-#include <glib.h>
-#include <string.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <math.h>
-
-#include "expr.h"
-#include "config.h"
-
-static MathToken *new_operator(gchar op)
-{
- MathToken *t = g_new0(MathToken, 1);
-
- t->val.op = op;
- t->type = TOKEN_OPERATOR; /* operator */
-
- return t;
-}
-
-static MathToken *new_variable(gchar var)
-{
- MathToken *t = g_new0(MathToken, 1);
-
- t->val.op = '@';
- t->type = TOKEN_VARIABLE; /* variable */
-
- return t;
-}
-
-static MathToken *new_value(gfloat value)
-{
- MathToken *t = g_new0(MathToken, 1);
-
- t->val.value = value;
- t->type = TOKEN_VALUE; /* value */
-
- return t;
-}
-
-static inline gint priority(char operation)
-{
- switch (operation) {
- case '^':
- return 3;
- case '*':
- case '/':
- return 2;
- case '+':
- case '-':
- return 1;
- case '(':
- return 0;
- }
-
- return 0;
-}
-
-GSList *math_infix_to_postfix(GSList * infix)
-{
- MathToken *stack[500];
- gint t_sp = 0;
-
- GSList *postfix = NULL, *p;
- MathToken *top;
-
- for (p = infix; p; p = p->next) {
- MathToken *t = (MathToken *) p->data;
-
- if (t->type == TOKEN_OPERATOR && t->val.op == '(') {
- stack[++t_sp] = t;
- } else if (t->type == TOKEN_OPERATOR && t->val.op == ')') {
- for (top = stack[t_sp]; t_sp != 0 && top->val.op != '(';
- top = stack[t_sp]) {
- postfix = g_slist_append(postfix, stack[t_sp--]);
- }
- t_sp--;
- } else if (t->type != TOKEN_OPERATOR) {
- postfix = g_slist_append(postfix, t);
- } else if (t_sp == 0) {
- stack[++t_sp] = t;
- } else {
- while (t_sp != 0
- && priority(t->val.op) <= priority(stack[t_sp]->val.op))
- postfix = g_slist_append(postfix, stack[t_sp--]);
- stack[++t_sp] = t;
- }
- }
-
- while (t_sp)
- postfix = g_slist_append(postfix, stack[t_sp--]);
-
- return postfix;
-}
-
-static inline gfloat __result(gfloat op1, gfloat op2, gchar operation)
-{
- switch (operation) {
- case '^':
- return powf(op1, op2);
- case '+':
- return op1 + op2;
- case '-':
- return op1 - op2;
- case '/':
- return op1 / op2;
- case '*':
- return op1 * op2;
- }
-
- return 0;
-}
-
-gfloat math_postfix_eval(GSList * postfix, gfloat at_value)
-{
- GSList *p;
- gfloat stack[500];
- gint sp = 0;
-
- memset(stack, 0, sizeof(gfloat) * 500);
-
- for (p = postfix; p; p = p->next) {
- MathToken *t = (MathToken *) p->data;
-
- if (t->type == TOKEN_VARIABLE) {
- stack[++sp] = at_value;
- } else if (t->type == TOKEN_VALUE) {
- stack[++sp] = t->val.value;
- } else {
- gfloat op1, op2;
-
- op2 = stack[sp--];
- op1 = stack[sp];
-
- stack[sp] = __result(op1, op2, t->val.op);
- }
- }
-
- return stack[sp];
-}
-
-GSList *math_string_to_infix(gchar * string)
-{
- GSList *infix = NULL;
- gchar *expr = string;
-
- for (; *expr; expr++) {
- if (strchr("+-/*^()", *expr)) {
- infix = g_slist_append(infix, new_operator(*expr));
- } else if (strchr("@", *expr)) {
- infix = g_slist_append(infix, new_variable(*expr));
- } else if (strchr("-.1234567890", *expr)) {
- gchar value[32], *v = value;
- gfloat floatval;
-
- do {
- *v++ = *expr++;
- } while (*expr && strchr("-.1234567890", *expr));
- expr--;
- *v = '\0';
-
- sscanf(value, "%f", &floatval);
-
- infix = g_slist_append(infix, new_value(floatval));
- } else if (!isspace(*expr)) {
- g_print("Invalid token: [%c][%d]\n", *expr, *expr);
- math_infix_free(infix, TRUE);
- return NULL;
- }
- }
-
- return infix;
-}
-
-void math_infix_free(GSList * infix, gboolean free_tokens)
-{
- GSList *p;
-
- if (!free_tokens)
- for (p = infix; p; p = g_slist_delete_link(p, p));
- else
- for (p = infix; p; p = g_slist_delete_link(p, p)) {
- MathToken *t = (MathToken *) p->data;
- g_free(t);
- }
-}
-
-GSList *math_string_to_postfix(gchar * string)
-{
- GSList *infix;
- GSList *postfix;
-
- infix = math_string_to_infix(string);
- if (!infix)
- return NULL;
-
- postfix = math_infix_to_postfix(infix);
- math_infix_free(infix, FALSE);
-
- return postfix;
-}
-
-gfloat math_string_eval(gchar * string, gfloat at_value)
-{
- GSList *postfix;
- gfloat val;
-
- postfix = math_string_to_postfix(string);
- val = math_postfix_eval(postfix, at_value);
- math_postfix_free(postfix, TRUE);
-
- return val;
-}
-
-#ifdef MATH_TEST
-int main(void)
-{
- GSList *postfix;
-
- gchar *expr = "0.9*(@+(5.2*0.923+3*(2.0)))";
-
- postfix = math_string_to_postfix(expr);
- g_print("%s = %f (must be 18.71964)\n", expr,
- math_postfix_eval(postfix, 10));
- math_postfix_free(postfix, TRUE);
-
- return 0;
-}
-#endif
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