1 files changed, 151 insertions, 0 deletions
diff --git a/src/parse-utils.c b/src/parse-utils.c
new file mode 100644
index 0000000..9c38e1e
--- /dev/null
+++ b/src/parse-utils.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include "event-utils.h"
+#include "event-parse.h"
+#include "kbuffer.h"
+
+#define __weak __attribute__((weak))
+
+static int log_level = TEP_LOG_CRITICAL;
+
+/**
+ * tep_set_loglevel - set log level of the library
+ * @level: desired level of the library messages
+ */
+void tep_set_loglevel(enum tep_loglevel level)
+{
+	log_level = level;
+}
+
+/**
+ * tep_vprint - print library log messages
+ * @name: name of the library.
+ * @level: severity of the log message. This parameter is not used in this implementation, but as
+ *	   the function is weak and can be overridden, having the log level could be useful
+ *	   for other implementations.
+ * @print_err: whether to print the errno, if non zero.
+ * @fmt: printf format string of the message.
+ * @ap: list of printf parameters.
+ *
+ * This function is used to print all messages from traceevent, tracefs and trace-cmd libraries.
+ * It is defined as weak, so the application that uses those libraries can override it in order
+ * to implement its own logic for printing library logs.
+ *
+ * Return the value of errno at the function enter.
+ */
+int __weak tep_vprint(const char *name, enum tep_loglevel level,
+		      bool print_err, const char *fmt, va_list ap)
+{
+	return __tep_vprint(name, level, print_err, fmt, ap);
+}
+
+/**
+ * __tep_vprint - print library log messages
+ * @name: name of the library.
+ * @level: severity of the log message. This parameter is not used in this implementation, but as
+ *	   the function is weak and can be overridden, having the log level could be useful
+ *	   for other implementations.
+ * @print_err: whether to print the errno, if non zero.
+ * @fmt: printf format string of the message.
+ * @ap: list of printf parameters.
+ *
+ * This function is used to print all messages from traceevent, tracefs and trace-cmd libraries.
+ * It is defined as weak, so the application that uses those libraries can override it in order
+ * to implement its own logic for printing library logs.
+ *
+ * Return the value of errno at the function enter.
+ */
+int __tep_vprint(const char *name, enum tep_loglevel level,
+		      bool print_err, const char *fmt, va_list ap)
+{
+	int ret = errno;
+	FILE *fp = stdout;
+
+	if (level <= TEP_LOG_WARNING) {
+		fp = stderr;
+		if (errno && print_err) {
+			perror(name);
+			fprintf(stderr, "  ");
+		}
+	}
+	vfprintf(fp, fmt, ap);
+	fprintf(fp, "\n");
+
+	return ret;
+}
+
+void tep_warning(const char *fmt, ...)
+{
+	va_list ap;
+
+	if (log_level < TEP_LOG_WARNING)
+		return;
+
+	va_start(ap, fmt);
+	tep_vprint("libtraceevent", TEP_LOG_WARNING, true, fmt, ap);
+	va_end(ap);
+}
+
+
+void tep_info(const char *fmt, ...)
+{
+	va_list ap;
+
+	if (log_level < TEP_LOG_INFO)
+		return;
+
+	va_start(ap, fmt);
+	tep_vprint("libtraceevent", TEP_LOG_INFO, false, fmt, ap);
+	va_end(ap);
+}
+
+/* The below is for backward compatibility */
+int __weak tep_vwarning(const char *name, const char *fmt, va_list ap)
+{
+	return tep_vprint(name, TEP_LOG_WARNING, true, fmt, ap);
+}
+
+void pr_stat(const char *fmt, ...) __attribute__((weak, alias("tep_info")));
+void __pr_stat(const char *fmt, ...) __attribute__((weak, alias("tep_info")));
+
+void __weak __vpr_stat(const char *fmt, va_list ap)
+{
+	tep_vprint("libtraceevent", TEP_LOG_INFO, false, fmt, ap);
+}
+
+void vpr_stat(const char *fmt, va_list ap) __attribute__((weak, alias("__vpr_stat")));
+
+/**
+ * tep_kbuffer - return an allocated kbuffer that can be used for the tep handle
+ * @tep: the handle that will work with the kbuffer descriptor
+ *
+ * Allocates and returns a new kbuffer.
+ * The return must be freed by kbuffer_free();
+ */
+struct kbuffer *tep_kbuffer(struct tep_handle *tep)
+{
+	enum kbuffer_endian endian;
+	int long_size;
+
+	long_size = tep_get_long_size(tep);
+	if (long_size == 8)
+		long_size = KBUFFER_LSIZE_8;
+	else
+		long_size = KBUFFER_LSIZE_4;
+
+	if (tep_is_file_bigendian(tep))
+		endian = KBUFFER_ENDIAN_BIG;
+	else
+		endian = KBUFFER_ENDIAN_LITTLE;
+
+	return kbuffer_alloc(long_size, endian);
+}