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      1 #include <stdio.h>
      2 #include <stdlib.h>
      3 #include <string.h>
      4 
      5 #include "../debug.h"
      6 #include "helpline.h"
      7 #include "ui.h"
      8 
      9 char ui_helpline__current[512];
     10 
     11 static void nop_helpline__pop(void)
     12 {
     13 }
     14 
     15 static void nop_helpline__push(const char *msg __maybe_unused)
     16 {
     17 }
     18 
     19 static int nop_helpline__show(const char *fmt __maybe_unused,
     20 			       va_list ap __maybe_unused)
     21 {
     22 	return 0;
     23 }
     24 
     25 static struct ui_helpline default_helpline_fns = {
     26 	.pop	= nop_helpline__pop,
     27 	.push	= nop_helpline__push,
     28 	.show	= nop_helpline__show,
     29 };
     30 
     31 struct ui_helpline *helpline_fns = &default_helpline_fns;
     32 
     33 void ui_helpline__pop(void)
     34 {
     35 	helpline_fns->pop();
     36 }
     37 
     38 void ui_helpline__push(const char *msg)
     39 {
     40 	helpline_fns->push(msg);
     41 }
     42 
     43 void ui_helpline__vpush(const char *fmt, va_list ap)
     44 {
     45 	char *s;
     46 
     47 	if (vasprintf(&s, fmt, ap) < 0)
     48 		vfprintf(stderr, fmt, ap);
     49 	else {
     50 		ui_helpline__push(s);
     51 		free(s);
     52 	}
     53 }
     54 
     55 void ui_helpline__fpush(const char *fmt, ...)
     56 {
     57 	va_list ap;
     58 
     59 	va_start(ap, fmt);
     60 	ui_helpline__vpush(fmt, ap);
     61 	va_end(ap);
     62 }
     63 
     64 void ui_helpline__puts(const char *msg)
     65 {
     66 	ui_helpline__pop();
     67 	ui_helpline__push(msg);
     68 }
     69 
     70 int ui_helpline__vshow(const char *fmt, va_list ap)
     71 {
     72 	return helpline_fns->show(fmt, ap);
     73 }
     74