[Powertop] [PATCH 03/10] lib: introduce ui_notify_user()

ui_notify_user(frmt, ...) prints formatted notification string at (x:1, y:0) WINDOW position. use fixed UI_NOTIFY_BUFF_SZ size buffer, because there seems to be no ncurses() *print function which takes int x, int y WINDOW coordinates and va_list. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky(a)gmail.com&gt; --- src/lib.cpp | 20 ++++++++++++++++++++ src/lib.h | 2 ++ 2 files changed, 22 insertions(+) diff --git a/src/lib.cpp b/src/lib.cpp index f27ec2f..a8f3746 100644 --- a/src/lib.cpp +++ b/src/lib.cpp @@ -528,3 +528,23 @@ int write_msr(int cpu, uint64_t offset, uint64_t value) return retval; } + +#define UI_NOTIFY_BUFF_SZ 2048 + +void ui_notify_user(const char *frmt, ...) +{ + char notify[UI_NOTIFY_BUFF_SZ]; + va_list list; + + start_color(); + init_pair(1, COLOR_BLACK, COLOR_WHITE); + attron(COLOR_PAIR(1)); + va_start(list, frmt); + /* there is no ncurses *print() function which takes + * int x, int y and va_list, this is why we use temp + * buffer */ + vsnprintf(notify, UI_NOTIFY_BUFF_SZ - 1, frmt, list); + va_end(list); + mvprintw(1, 0, notify); + attroff(COLOR_PAIR(1)); +} diff --git a/src/lib.h b/src/lib.h index 2caf12f..adcc4a2 100644 --- a/src/lib.h +++ b/src/lib.h @@ -78,4 +78,6 @@ extern int read_msr(int cpu, uint64_t offset, uint64_t *value); extern int write_msr(int cpu, uint64_t offset, uint64_t value); extern void align_string(char *buffer, size_t min_sz, size_t max_sz); + +extern void ui_notify_user(const char *frmt, ...); #endif -- 1.8.4.679.g0a1a803