1 // SPDX-License-Identifier: GPL-2.0 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <string.h> 5 6 #include "../debug.h" 7 #include "helpline.h" 8 #include "ui.h" 9 #include "../util.h" 10 11 char ui_helpline__current[512]; 12 13 static void nop_helpline__pop(void) 14 { 15 } 16 17 static void nop_helpline__push(const char *msg __maybe_unused) 18 { 19 } 20 21 static int nop_helpline__show(const char *fmt __maybe_unused, 22 va_list ap __maybe_unused) 23 { 24 return 0; 25 } 26 27 static struct ui_helpline default_helpline_fns = { 28 .pop = nop_helpline__pop, 29 .push = nop_helpline__push, 30 .show = nop_helpline__show, 31 }; 32 33 struct ui_helpline *helpline_fns = &default_helpline_fns; 34 35 void ui_helpline__pop(void) 36 { 37 helpline_fns->pop(); 38 } 39 40 void ui_helpline__push(const char *msg) 41 { 42 helpline_fns->push(msg); 43 } 44 45 void ui_helpline__vpush(const char *fmt, va_list ap) 46 { 47 char *s; 48 49 if (vasprintf(&s, fmt, ap) < 0) 50 vfprintf(stderr, fmt, ap); 51 else { 52 ui_helpline__push(s); 53 free(s); 54 } 55 } 56 57 void ui_helpline__fpush(const char *fmt, ...) 58 { 59 va_list ap; 60 61 va_start(ap, fmt); 62 ui_helpline__vpush(fmt, ap); 63 va_end(ap); 64 } 65 66 void ui_helpline__puts(const char *msg) 67 { 68 ui_helpline__pop(); 69 ui_helpline__push(msg); 70 } 71 72 int ui_helpline__vshow(const char *fmt, va_list ap) 73 { 74 return helpline_fns->show(fmt, ap); 75 } 76 77 void ui_helpline__printf(const char *fmt, ...) 78 { 79 va_list ap; 80 81 ui_helpline__pop(); 82 va_start(ap, fmt); 83 ui_helpline__vpush(fmt, ap); 84 va_end(ap); 85 } 86