From 55da9c20452dd62db8fb776d4fee8f16a967281d Mon Sep 17 00:00:00 2001
From: David <dbphillipsnz@gmail.com>
Date: Sat, 10 May 2014 13:31:43 +1200
Subject: Better makefile (I got sidetracked)

---
 getfreq.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 getfreq.c

(limited to 'getfreq.c')

diff --git a/getfreq.c b/getfreq.c
new file mode 100644
index 0000000..4b00775
--- /dev/null
+++ b/getfreq.c
@@ -0,0 +1,137 @@
+/************************************************************************
+ * This file is part of trayfreq-archlinux.                             *
+ *                                                                      *
+ * trayfreq-archlinux 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 3 of the   *
+ * License, or (at your option) any later version.                      *
+ *                                                                      *
+ * trayfreq-archlinux 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 trayfreq-archlinux. If not, see                           *
+ * <http://www.gnu.org/licenses/>.                                      *
+ ************************************************************************/
+
+#include "getfreq.h"
+#include "getcore.h"
+#include "math.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+
+/* [CORE][FREQUENCY NUMBER] */
+char AVAILABLE_FREQUENCIES[999][50][13];
+int NUMBER_OF_AVAILABLE_FREQUENCIES;
+
+void gf_init()
+{
+	// TO DO : get rid of magic constants
+	gchar freq_string[500];
+
+	int i = 0;
+	int j = 0;
+	for(i = 0; i < gc_number(); ++i)
+	{
+		memset(freq_string, '\0', 500);
+
+		// Get available governor freqs. If no governor, try next cpu
+		if (gf_available(i, freq_string, 500) == -1)
+		{
+			debug("Couldn't find gov on core %d\n",i);
+			continue;
+		}
+
+		/* go through every frequency in freq_string */
+		j = 0;
+		gchar* curr = &freq_string[0];
+		gchar* end_of_curr = g_strstr_len(curr, strlen(curr), " ");
+		while(end_of_curr)
+		{
+			memset(AVAILABLE_FREQUENCIES[i][j], '\0', 13);
+			memmove(AVAILABLE_FREQUENCIES[i][j], curr, end_of_curr - curr);
+
+			curr = end_of_curr+1;
+			end_of_curr = g_strstr_len(curr, strlen(curr), " ");
+			++j;
+		}
+	}
+	NUMBER_OF_AVAILABLE_FREQUENCIES = j;
+	debug("Found %d frequencies\n",j);
+}
+
+int gf_current(int core)
+{
+	FILE* fd;
+	char buff[13];
+	char path[80];
+	int freq;
+
+	sprintf(path, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", core);
+
+	if(!(fd = fopen(path, "r")))
+	{
+		debug("Couldn't open '%s'\n",path);
+		return -1;
+	}
+
+	fgets(buff, 13, fd);
+
+	freq = atoi(buff);
+	fclose(fd);
+	debug("Found freq %d on core %d\n",freq,core);
+	return freq;
+}
+
+int gf_available(int core, char* out, int size)
+{
+	FILE* fd;
+	char path[80];
+
+	sprintf(path, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_available_frequencies", core);
+
+	if(!(fd = fopen(path, "r")))
+	{
+		debug("Couldn't open '%s'\n",path);
+		return -1;
+	}
+
+	fgets(out, size, fd);
+
+	fclose(fd);
+	return 0;
+}
+
+void gf_get_frequency_label(int freq, char* out)
+{
+	int i = 0;
+	while(freq/pow(10, i) >= 1)
+	  ++i;
+
+	if(i == 7)
+		sprintf(out, "%.2f GHz", freq/pow(10, i-1));
+	else
+		sprintf(out, "%.2d MHz", freq/1000);
+
+	debug("Prepared freq label '%s' for freq %d\n",out,freq);
+}
+
+char* gf_freqa(int core, int index)
+{
+	return AVAILABLE_FREQUENCIES[core][index];
+}
+
+int gf_freqi(int core, int index)
+{
+	return atoi(gf_freqa(core, index));
+}
+
+int gf_number()
+{
+	return NUMBER_OF_AVAILABLE_FREQUENCIES;
+}
-- 
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