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annotate menu.c @ 875:54ffba3768d6

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Make menu stuff work on Android (theoretically)
author Michael Pavone <pavone@retrodev.com>
date Sun, 08 Nov 2015 22:03:34 -0800
parents b6842dfb8edf
children 75453bf2ffac
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
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1 #include <stdint.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <stdio.h>
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5 #include "blastem.h"
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6 #include "menu.h"
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7 #include "backend.h"
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8 #include "util.h"
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9
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10
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11 uint16_t menu_read_w(uint32_t address, void * context)
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12 {
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13 //This should return the status of the last request with 0
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14 //meaning either the request is complete or no request is pending
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15 //in the current implementation, the operations happen instantly
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16 //in emulated time so we can always return 0
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17 return 0;
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18 }
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19
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20 int menu_dir_sort(const void *a, const void *b)
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21 {
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22 const dir_entry *da, *db;
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23 da = a;
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24 db = b;
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25 if (da->is_dir != db->is_dir) {
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26 return db->is_dir - da->is_dir;
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27 }
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28 return strcasecmp(((dir_entry *)a)->name, ((dir_entry *)b)->name);
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29 }
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30
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31 void copy_string_from_guest(m68k_context *m68k, uint32_t guest_addr, char *buf, size_t maxchars)
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32 {
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33 char *cur;
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34 char *src = NULL;
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35 for (cur = buf; cur < buf+maxchars; cur+=2, guest_addr+=2, src+=2)
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36 {
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37 if (!src || !(guest_addr & 0xFFFF)) {
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38 //we may have walked off the end of a memory block, get a fresh native pointer
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39 src = get_native_pointer(guest_addr, (void **)m68k->mem_pointers, &m68k->options->gen);
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40 if (!src) {
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41 break;
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42 }
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43 }
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44 *cur = src[1];
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45 cur[1] = *src;
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46 if (!*src || !src[1]) {
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47 break;
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48 }
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49 }
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50 //make sure we terminate the string even if we did not hit a null terminator in the source
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51 buf[maxchars-1] = 0;
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52 }
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53
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54 void * menu_write_w(uint32_t address, void * context, uint16_t value)
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55 {
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56 m68k_context *m68k = context;
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57 genesis_context *gen = m68k->system;
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58 menu_context *menu = gen->extra;
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59 if (!menu) {
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60 gen->extra = menu = calloc(1, sizeof(menu_context));
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61 menu->curpath = tern_find_path(config, "ui\0initial_path\0").ptrval;
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62 if (menu->curpath) {
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63 menu->curpath = strdup(menu->curpath);
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64 } else {
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65 #ifdef __ANDROID__
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66 menu->curpath = strdup(SDL_AndroidGetExternalStoragePath());
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67 #else
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68 menu->curpath = strdup(get_home_dir());
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69 #endif
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70 }
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71 }
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72 if (menu->state) {
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73 uint32_t dst = menu->latch << 16 | value;
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74 switch (address >> 2)
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75 {
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76 case 0: {
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77 size_t num_entries;
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78 dir_entry *entries = get_dir_list(menu->curpath, &num_entries);
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79 if (entries) {
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80 qsort(entries, num_entries, sizeof(dir_entry), menu_dir_sort);
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81 }
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82 uint8_t *dest;
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83 for (size_t i = 0; i < num_entries; i++)
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84 {
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85 dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
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86 if (!dest) {
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87 break;
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88 }
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89 *(dest++) = entries[i].is_dir;
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90 *(dest++) = 1;
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91 dst += 2;
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92 uint8_t term = 0;
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93 for (char *cpos = entries[i].name; *cpos; cpos++)
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94 {
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95 dest[1] = *cpos;
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96 dest[0] = cpos[1];
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97 if (cpos[1]) {
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98 cpos++;
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99 } else {
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100 term = 1;
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101 }
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102 dst += 2;
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103 if (!(dst & 0xFFFF)) {
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104 //we may have walked off the end of a memory block, get a fresh native pointer
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105 dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
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106 if (!dest) {
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107 break;
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108 }
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109 } else {
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110 dest += 2;
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111 }
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112 }
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113 if (!term) {
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114 *(dest++) = 0;
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115 *dest = 0;
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116 dst += 2;
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117 }
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118 }
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119 //terminate list
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120 dest = get_native_pointer(dst, (void **)m68k->mem_pointers, &m68k->options->gen);
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121 if (dest) {
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122 *dest = dest[1] = 0;
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123 free_dir_list(entries, num_entries);
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124 }
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125 break;
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126 }
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127 case 1: {
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128 char buf[4096];
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129 copy_string_from_guest(m68k, dst, buf, sizeof(buf));
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130 if (!strcmp(buf, "..")) {
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131 size_t len = strlen(menu->curpath);
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132 while (len > 1) {
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133 --len;
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134 if (menu->curpath[len] == '/') {
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135 menu->curpath[len] = 0;
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136 break;
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137 }
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Michael Pavone <pavone@retrodev.com>
parents: 868
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138 }
f173317ecdb4 More efficient handling of going up one directory in menu
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parents: 868
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139 } else {
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140 char *pieces[] = {menu->curpath, "/", buf};
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141 menu->curpath = alloc_concat_m(3, pieces);
f173317ecdb4 More efficient handling of going up one directory in menu
Michael Pavone <pavone@retrodev.com>
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142 free(pieces[0]);
f173317ecdb4 More efficient handling of going up one directory in menu
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parents: 868
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143 }
866
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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144 break;
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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145 }
873
91bf4d905eba Retrieve ROM filename from menu port write
Michael Pavone <pavone@retrodev.com>
parents: 872
diff changeset
146 case 2: {
91bf4d905eba Retrieve ROM filename from menu port write
Michael Pavone <pavone@retrodev.com>
parents: 872
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147 char buf[4096];
91bf4d905eba Retrieve ROM filename from menu port write
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parents: 872
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148 copy_string_from_guest(m68k, dst, buf, sizeof(buf));
874
b6842dfb8edf ROM is now run after being selected in menu. Initial path for menu is read from config file.
Michael Pavone <pavone@retrodev.com>
parents: 873
diff changeset
149 char *pieces[] = {menu->curpath, "/", buf};
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parents: 873
diff changeset
150 gen->next_rom = alloc_concat_m(3, pieces);
872
7022ba865cfd Initial work for allowing loading a ROM from menu
Michael Pavone <pavone@retrodev.com>
parents: 870
diff changeset
151 m68k->should_return = 1;
7022ba865cfd Initial work for allowing loading a ROM from menu
Michael Pavone <pavone@retrodev.com>
parents: 870
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152 break;
873
91bf4d905eba Retrieve ROM filename from menu port write
Michael Pavone <pavone@retrodev.com>
parents: 872
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153 }
866
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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154 default:
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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155 fprintf(stderr, "WARNING: write to undefined menu port %X\n", address);
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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156 }
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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157 menu->state = 0;
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parents:
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158 } else {
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Michael Pavone <pavone@retrodev.com>
parents:
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159 menu->latch = value;
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parents:
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160 menu->state = 1;
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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161 }
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
162
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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163 return context;
69a6ec208111 Menu ROM now pulls real file names from the OS rather than using a fake list
Michael Pavone <pavone@retrodev.com>
parents:
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164 }