create common proc_tools

proc_put, proc_get and proc_get_hex are used in many files.
Avoid duplication by moving them to common/proc_tools.c.
Convert azbox's cVideo to use proc_tools.h


Origin commit data
------------------
Branch: master
Commit: 47941bd849
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2012-06-24 (Sun, 24 Jun 2012)



------------------
This commit was generated by Migit

Makefile.am

@@ -5,7 +5,8 @@ bin_PROGRAMS = libstb-hal-test
 
 libstb_hal_a_LIBADD = \
 	common/ca.o \
-	common/lt_debug.o
+	common/lt_debug.o \
+	common/proc_tools.o
 
 libstb_hal_test_SOURCES = libtest.cpp
 libstb_hal_test_LDADD = \

azbox/video.cpp

@@ -34,6 +34,9 @@
 
 #include <linux/types.h>
 #include <linux/dvb/video.h>
+
+#include <proc_tools.h>
+
 #include "video_lib.h"
 #define VIDEO_DEVICE "/dev/dvb/adapter0/video0"
 #include "lt_debug.h"
@@ -67,50 +70,6 @@ static bool stillpicture = false;
 #define VIDEO_STREAMTYPE_VC1_SM 5
 #define VIDEO_STREAMTYPE_MPEG1 6
 
-
-static int proc_put(const char *path, const char *value, const int len)
-{
-	int ret, ret2;
-	int pfd = open(path, O_WRONLY);
-	if (pfd < 0)
-		return pfd;
-	ret = write(pfd, value, len);
-	ret2 = close(pfd);
-	if (ret2 < 0)
-		return ret2;
-	return ret;
-}
-
-static int proc_get(const char *path, char *value, const int len)
-{
-	int ret, ret2;
-	int pfd = open(path, O_RDONLY);
-	if (pfd < 0)
-		return pfd;
-	ret = read(pfd, value, len);
-	value[len-1] = '\0'; /* make sure string is terminated */
-	if (ret >= 0)
-	{
-		while (ret > 0 && isspace(value[ret-1]))
-			ret--;		/* remove trailing whitespace */
-		value[ret] = '\0';	/* terminate, even if ret = 0 */
-	}
-	ret2 = close(pfd);
-	if (ret2 < 0)
-		return ret2;
-	return ret;
-}
-
-static unsigned int proc_get_hex(const char *path)
-{
-	unsigned int n, ret = 0;
-	char buf[16];
-	n = proc_get(path, buf, 16);
-	if (n > 0)
-		sscanf(buf, "%x", &ret);
-	return ret;
-}
-
 cVideo::cVideo(int, void *, void *)
 {
 	lt_debug("%s\n", __FUNCTION__);

common/Makefile.am

@@ -4,4 +4,5 @@ AM_CXXFLAGS = -fno-rtti -fno-exceptions -fno-strict-aliasing
 
 libcommon_a_SOURCES = \
 	ca.cpp \
-	lt_debug.cpp
+	lt_debug.cpp \
+	proc_tools.c

common/proc_tools.c

@@ -0,0 +1,59 @@
+/*
+ * helper functions to interact with files, usually in the proc filesystem
+ *
+ * (C) 2012 Stefan Seyfried <seife@tuxboxcvs.slipkontur.de>
+ *
+ * License: GPLv2 or later
+ *
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>	/* isspace */
+#include <stdio.h>	/* sscanf */
+
+#include "proc_tools.h"
+
+int proc_put(const char *path, const char *value, const int len)
+{
+	int ret, ret2;
+	int pfd = open(path, O_WRONLY);
+	if (pfd < 0)
+		return pfd;
+	ret = write(pfd, value, len);
+	ret2 = close(pfd);
+	if (ret2 < 0)
+		return ret2;
+	return ret;
+}
+
+int proc_get(const char *path, char *value, const int len)
+{
+	int ret, ret2;
+	int pfd = open(path, O_RDONLY);
+	if (pfd < 0)
+		return pfd;
+	ret = read(pfd, value, len);
+	value[len-1] = '\0'; /* make sure string is terminated */
+	if (ret >= 0)
+	{
+		while (ret > 0 && isspace(value[ret-1]))
+			ret--;		/* remove trailing whitespace */
+		value[ret] = '\0';	/* terminate, even if ret = 0 */
+	}
+	ret2 = close(pfd);
+	if (ret2 < 0)
+		return ret2;
+	return ret;
+}
+
+unsigned int proc_get_hex(const char *path)
+{
+	unsigned int n, ret = 0;
+	char buf[16];
+	n = proc_get(path, buf, 16);
+	if (n > 0)
+		sscanf(buf, "%x", &ret);
+	return ret;
+}

common/proc_tools.h

@@ -0,0 +1,20 @@
+/*
+ * helper functions to interact with files, usually in the proc filesystem
+ *
+ * (C) 2012 Stefan Seyfried <seife@tuxboxcvs.slipkontur.de>
+ *
+ * License: GPLv2 or later
+ *
+ */
+#ifndef __PROC_TOOLS_H__
+#define __PROC_TOOLS_H__
+#ifdef __cplusplus
+extern "C" {
+#endif
+int proc_put(const char *path, const char *value, const int len);
+int proc_get(const char *path, char *value, const int len);
+unsigned int proc_get_hex(const char *path);
+#ifdef __cplusplus
+}
+#endif
+#endif