ui-cli.c

   1 #include <errno.h>
   2 #include <stdint.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 #include "macros.h"
   7 #include "quiver.h"
   8 #include "ui.h"
   9
  10 /* Whether we actually need to draw this frame or not */
  11 static uint_fast8_t need_to_draw = 1;
  12
  13 /* The quiver */
  14 struct quiver *q;
  15
  16 /* The event we'll give back */
  17 static struct ui_event pass_back = { 0 };
  18
  19 /* Intialize CLI */
  20 int ui_init(struct quiver *i_q)
  21 {
  22         q = i_q;
  23
  24         return 0;
  25 }
  26
  27 /* Deal with the fact that the quiver was changed */
  28 int ui_respond_quiver_change(void)
  29 {
  30         return 0;
  31 }
  32
  33 /* Tear down CLI */
  34 int ui_teardown(void)
  35 {
  36         return 0;
  37 }
  38
  39 /* Record that a frame has been started */
  40 int ui_start_frame(void)
  41 {
  42         return 0;
  43 }
  44
  45 /* Draw a frame, sleep to framelimit */
  46 int ui_finish_frame(void)
  47 {
  48         size_t i = 0;
  49         size_t j = 0;
  50         struct rational *e = 0;
  51         size_t line_length = 0;
  52
  53         if (!need_to_draw) {
  54                 return 0;
  55         }
  56
  57         printf("%*s| Name\n----------\n", 4, "i");
  58
  59         for (j = 0; j < q->v_num; ++j) {
  60                 printf("%*llu | %s\n", 4, (long long unsigned) j, q->v[j].name);
  61         }
  62
  63         line_length = printf("%*s| ", 4, "i\\j");
  64
  65         for (j = 0; j < q->v_num; ++j) {
  66                 line_length += printf("%*llu", 5, (long long unsigned) j);
  67         }
  68
  69         putchar('\n');
  70
  71         for (j = 0; j < line_length; ++j) {
  72                 putchar('-');
  73         }
  74
  75         for (i = 0; i < q->v_num; ++i) {
  76                 printf("\n %*llu| ", 3, (long long unsigned) i);
  77
  78                 for (j = 0; j < q->v_num; ++j) {
  79                         e = &(q->e[i * q->v_len + j]);
  80
  81                         if (e->p == 0) {
  82                                 printf("%*s", 5, "");
  83                         } else if (e->q == 1) {
  84                                 printf("%*lld", 5, (long long int) e->p);
  85                         } else {
  86                                 printf("%*lld/%llu", 3, (long long int) e->p,
  87                                        (long long unsigned) e->q);
  88                         }
  89                 }
  90         }
  91
  92         printf("\n> ");
  93         fflush(stdout);
  94         need_to_draw = 0;
  95
  96         return 0;
  97 }
  98
  99 int ui_confirm_deny(const char *s)
 100 {
 101         int c = 0;
 102
 103         printf("%s [y/n]\n", s);
 104
 105         while ((c = fgetc(stdin))) {
 106                 if (c == EOF) {
 107                         pass_back = (struct ui_event) { .type = ET_FORCE_QUIT };
 108                         break;
 109                 }
 110
 111                 if (c == 'y' ||
 112                     c == 'Y') {
 113                         pass_back = (struct ui_event) { .type = ET_CONFIRM };
 114                         break;
 115                 } else if (c == 'n' ||
 116                            c == 'N') {
 117                         pass_back = (struct ui_event) { .type = ET_DENY };
 118                         break;
 119                 }
 120         }
 121
 122         return 0;
 123 }
 124
 125 int ui_get_event(struct ui_event *e, uint_fast8_t *more)
 126 {
 127         *e = pass_back;
 128         *more = 0;
 129         pass_back = (struct ui_event) { 0 };
 130
 131         return 0;
 132 }