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      1 #define _GNU_SOURCE
      2 #include <stdio.h>
      3 #include <stdlib.h>
      4 #include <newt.h>
      5 
      6 #include "../debug.h"
      7 #include "helpline.h"
      8 #include "ui.h"
      9 
     10 void ui_helpline__pop(void)
     11 {
     12 	newtPopHelpLine();
     13 }
     14 
     15 void ui_helpline__push(const char *msg)
     16 {
     17 	newtPushHelpLine(msg);
     18 }
     19 
     20 void ui_helpline__vpush(const char *fmt, va_list ap)
     21 {
     22 	char *s;
     23 
     24 	if (vasprintf(&s, fmt, ap) < 0)
     25 		vfprintf(stderr, fmt, ap);
     26 	else {
     27 		ui_helpline__push(s);
     28 		free(s);
     29 	}
     30 }
     31 
     32 void ui_helpline__fpush(const char *fmt, ...)
     33 {
     34 	va_list ap;
     35 
     36 	va_start(ap, fmt);
     37 	ui_helpline__vpush(fmt, ap);
     38 	va_end(ap);
     39 }
     40 
     41 void ui_helpline__puts(const char *msg)
     42 {
     43 	ui_helpline__pop();
     44 	ui_helpline__push(msg);
     45 }
     46 
     47 void ui_helpline__init(void)
     48 {
     49 	ui_helpline__puts(" ");
     50 }
     51 
     52 char ui_helpline__last_msg[1024];
     53 
     54 int ui_helpline__show_help(const char *format, va_list ap)
     55 {
     56 	int ret;
     57 	static int backlog;
     58 
     59 	pthread_mutex_lock(&ui__lock);
     60 	ret = vsnprintf(ui_helpline__last_msg + backlog,
     61 			sizeof(ui_helpline__last_msg) - backlog, format, ap);
     62 	backlog += ret;
     63 
     64 	if (ui_helpline__last_msg[backlog - 1] == '\n') {
     65 		ui_helpline__puts(ui_helpline__last_msg);
     66 		newtRefresh();
     67 		backlog = 0;
     68 	}
     69 	pthread_mutex_unlock(&ui__lock);
     70 
     71 	return ret;
     72 }
     73