| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (stdin_stream.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | #include <stdio.h> |
| 23 | #include <stdint.h> |
| 24 | #include <stddef.h> |
| 25 | #include <string.h> |
| 26 | #include <ctype.h> |
| 27 | |
| 28 | #ifdef _WIN32 |
| 29 | #ifndef _XBOX |
| 30 | #include <windows.h> |
| 31 | #endif |
| 32 | #include <direct.h> |
| 33 | #else |
| 34 | #include <unistd.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <boolean.h> |
| 38 | #include <retro_environment.h> |
| 39 | #include <streams/stdin_stream.h> |
| 40 | |
| 41 | #if (defined(_WIN32) && defined(_XBOX)) || defined(__WINRT__) || !defined(__PSL1GHT__) && defined(__PS3__) |
| 42 | size_t read_stdin(char *buf, size_t size) |
| 43 | { |
| 44 | /* Not implemented. */ |
| 45 | return 0; |
| 46 | } |
| 47 | #elif defined(_WIN32) |
| 48 | size_t read_stdin(char *buf, size_t size) |
| 49 | { |
| 50 | DWORD i; |
| 51 | DWORD has_read = 0; |
| 52 | DWORD avail = 0; |
| 53 | bool echo = false; |
| 54 | HANDLE hnd = GetStdHandle(STD_INPUT_HANDLE); |
| 55 | |
| 56 | if (hnd == INVALID_HANDLE_VALUE) |
| 57 | return 0; |
| 58 | |
| 59 | /* Check first if we're a pipe |
| 60 | * (not console). */ |
| 61 | |
| 62 | /* If not a pipe, check if we're running in a console. */ |
| 63 | if (!PeekNamedPipe(hnd, NULL, 0, NULL, &avail, NULL)) |
| 64 | { |
| 65 | INPUT_RECORD recs[256]; |
| 66 | bool has_key = false; |
| 67 | DWORD mode = 0; |
| 68 | DWORD has_read = 0; |
| 69 | |
| 70 | if (!GetConsoleMode(hnd, &mode)) |
| 71 | return 0; |
| 72 | |
| 73 | if ((mode & (ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT)) |
| 74 | && !SetConsoleMode(hnd, |
| 75 | mode & ~(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT))) |
| 76 | return 0; |
| 77 | |
| 78 | /* Win32, Y U NO SANE NONBLOCK READ!? */ |
| 79 | if (!PeekConsoleInput(hnd, recs, |
| 80 | sizeof(recs) / sizeof(recs[0]), &has_read)) |
| 81 | return 0; |
| 82 | |
| 83 | for (i = 0; i < has_read; i++) |
| 84 | { |
| 85 | /* Very crude, but should get the job done. */ |
| 86 | if (recs[i].EventType == KEY_EVENT && |
| 87 | recs[i].Event.KeyEvent.bKeyDown && |
| 88 | (isgraph(recs[i].Event.KeyEvent.wVirtualKeyCode) || |
| 89 | recs[i].Event.KeyEvent.wVirtualKeyCode == VK_RETURN)) |
| 90 | { |
| 91 | has_key = true; |
| 92 | echo = true; |
| 93 | avail = size; |
| 94 | break; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | if (!has_key) |
| 99 | { |
| 100 | FlushConsoleInputBuffer(hnd); |
| 101 | return 0; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | if (!avail) |
| 106 | return 0; |
| 107 | |
| 108 | if (avail > size) |
| 109 | avail = size; |
| 110 | |
| 111 | if (!ReadFile(hnd, buf, avail, &has_read, NULL)) |
| 112 | return 0; |
| 113 | |
| 114 | for (i = 0; i < has_read; i++) |
| 115 | if (buf[i] == '\r') |
| 116 | buf[i] = '\n'; |
| 117 | |
| 118 | /* Console won't echo for us while in non-line mode, |
| 119 | * so do it manually ... */ |
| 120 | if (echo) |
| 121 | { |
| 122 | HANDLE hnd_out = GetStdHandle(STD_OUTPUT_HANDLE); |
| 123 | if (hnd_out != INVALID_HANDLE_VALUE) |
| 124 | { |
| 125 | DWORD has_written; |
| 126 | WriteConsole(hnd_out, buf, has_read, &has_written, NULL); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | return has_read; |
| 131 | } |
| 132 | #else |
| 133 | size_t read_stdin(char *buf, size_t size) |
| 134 | { |
| 135 | size_t has_read = 0; |
| 136 | |
| 137 | while (size) |
| 138 | { |
| 139 | ssize_t ret = read(STDIN_FILENO, buf, size); |
| 140 | |
| 141 | if (ret <= 0) |
| 142 | break; |
| 143 | |
| 144 | buf += ret; |
| 145 | has_read += ret; |
| 146 | size -= ret; |
| 147 | } |
| 148 | |
| 149 | return has_read; |
| 150 | } |
| 151 | #endif |