lib: add bt_lib_log_v()

This is a `va_list` (vprintf() style) version of bt_lib_log().

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Change-Id: I41dc0e247c79e8f22cc930b27ec4f13a2dd6d573
Reviewed-on: https://review.lttng.org/c/babeltrace/+/3441

diff --git a/src/lib/lib-logging.c b/src/lib/lib-logging.c
index 1730f6d09c93588f43f2388da579b0b820daa2e6..4085cd26f6a8885c80a513543f46cb2ba6a384c2 100644 (file)
--- a/src/lib/lib-logging.c
+++ b/src/lib/lib-logging.c
@@ -1484,6 +1484,15 @@ update_fmt:
        *out_fmt_ch = fmt_ch;
 }
 
+void bt_lib_log_v(const char *func, const char *file, unsigned line,
+               int lvl, const char *tag, const char *fmt, va_list *args)
+{
+       BT_ASSERT(fmt);
+       bt_common_custom_vsnprintf(lib_logging_buf, LIB_LOGGING_BUF_SIZE, '!',
+               handle_conversion_specifier_bt, NULL, fmt, args);
+       _bt_log_write_d(func, file, line, lvl, tag, "%s", lib_logging_buf);
+}
+
 void bt_lib_log(const char *func, const char *file, unsigned line,
                int lvl, const char *tag, const char *fmt, ...)
 {
@@ -1491,10 +1500,8 @@ void bt_lib_log(const char *func, const char *file, unsigned line,
 
        BT_ASSERT(fmt);
        va_start(args, fmt);
-       bt_common_custom_vsnprintf(lib_logging_buf, LIB_LOGGING_BUF_SIZE, '!',
-               handle_conversion_specifier_bt, NULL, fmt, &args);
+       bt_lib_log_v(func, file, line, lvl, tag, fmt, &args);
        va_end(args);
-       _bt_log_write_d(func, file, line, lvl, tag, "%s", lib_logging_buf);
 }
 
 void bt_lib_maybe_log_and_append_cause(const char *func, const char *file,

diff --git a/src/lib/logging.h b/src/lib/logging.h
index 25699c84b81c5ae06aa44baf70b6cbb3a425a5ef..8462e47cb782787868d02ad9f04c286cb7f8bbb7 100644 (file)
--- a/src/lib/logging.h
+++ b/src/lib/logging.h
@@ -57,6 +57,9 @@ int bt_lib_log_level;
 void bt_lib_log(const char *func, const char *file, unsigned line,
                int lvl, const char *tag, const char *fmt, ...);
 
+void bt_lib_log_v(const char *func, const char *file, unsigned line,
+               int lvl, const char *tag, const char *fmt, va_list *args);
+
 #define BT_LIB_LOG_AND_APPEND(_lvl, _fmt, ...)                         \
        do {                                                            \
                bt_lib_maybe_log_and_append_cause(                      \