| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (file_stream_transforms.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 | |
| 23 | #include <string.h> |
| 24 | #include <stdarg.h> |
| 25 | |
| 26 | #include <libretro.h> |
| 27 | #include <streams/file_stream.h> |
| 28 | |
| 29 | RFILE* rfopen(const char *path, const char *mode) |
| 30 | { |
| 31 | RFILE *output = NULL; |
| 32 | unsigned int retro_mode = RETRO_VFS_FILE_ACCESS_READ; |
| 33 | bool position_to_end = false; |
| 34 | |
| 35 | if (strstr(mode, "r")) |
| 36 | { |
| 37 | retro_mode = RETRO_VFS_FILE_ACCESS_READ; |
| 38 | if (strstr(mode, "+")) |
| 39 | { |
| 40 | retro_mode = RETRO_VFS_FILE_ACCESS_READ_WRITE | |
| 41 | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING; |
| 42 | } |
| 43 | } |
| 44 | else if (strstr(mode, "w")) |
| 45 | { |
| 46 | retro_mode = RETRO_VFS_FILE_ACCESS_WRITE; |
| 47 | if (strstr(mode, "+")) |
| 48 | retro_mode = RETRO_VFS_FILE_ACCESS_READ_WRITE; |
| 49 | } |
| 50 | else if (strstr(mode, "a")) |
| 51 | { |
| 52 | retro_mode = RETRO_VFS_FILE_ACCESS_WRITE | |
| 53 | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING; |
| 54 | position_to_end = true; |
| 55 | if (strstr(mode, "+")) |
| 56 | { |
| 57 | retro_mode = RETRO_VFS_FILE_ACCESS_READ_WRITE | |
| 58 | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | output = filestream_open(path, retro_mode, |
| 63 | RETRO_VFS_FILE_ACCESS_HINT_NONE); |
| 64 | if (output && position_to_end) |
| 65 | filestream_seek(output, 0, RETRO_VFS_SEEK_POSITION_END); |
| 66 | |
| 67 | return output; |
| 68 | } |
| 69 | |
| 70 | int rfclose(RFILE* stream) |
| 71 | { |
| 72 | if (!stream) |
| 73 | return EOF; |
| 74 | |
| 75 | return filestream_close(stream); |
| 76 | } |
| 77 | |
| 78 | int64_t rftell(RFILE* stream) |
| 79 | { |
| 80 | if (!stream) |
| 81 | return -1; |
| 82 | |
| 83 | return filestream_tell(stream); |
| 84 | } |
| 85 | |
| 86 | int64_t rfseek(RFILE* stream, int64_t offset, int origin) |
| 87 | { |
| 88 | int seek_position = -1; |
| 89 | |
| 90 | if (!stream) |
| 91 | return -1; |
| 92 | |
| 93 | switch (origin) |
| 94 | { |
| 95 | case SEEK_SET: |
| 96 | seek_position = RETRO_VFS_SEEK_POSITION_START; |
| 97 | break; |
| 98 | case SEEK_CUR: |
| 99 | seek_position = RETRO_VFS_SEEK_POSITION_CURRENT; |
| 100 | break; |
| 101 | case SEEK_END: |
| 102 | seek_position = RETRO_VFS_SEEK_POSITION_END; |
| 103 | break; |
| 104 | } |
| 105 | |
| 106 | return filestream_seek(stream, offset, seek_position); |
| 107 | } |
| 108 | |
| 109 | int64_t rfread(void* buffer, |
| 110 | size_t elem_size, size_t elem_count, RFILE* stream) |
| 111 | { |
| 112 | if (!stream || (elem_size == 0) || (elem_count == 0)) |
| 113 | return 0; |
| 114 | |
| 115 | return (filestream_read(stream, buffer, elem_size * elem_count) / elem_size); |
| 116 | } |
| 117 | |
| 118 | char *rfgets(char *buffer, int maxCount, RFILE* stream) |
| 119 | { |
| 120 | if (!stream) |
| 121 | return NULL; |
| 122 | |
| 123 | return filestream_gets(stream, buffer, maxCount); |
| 124 | } |
| 125 | |
| 126 | int rfgetc(RFILE* stream) |
| 127 | { |
| 128 | if (!stream) |
| 129 | return EOF; |
| 130 | |
| 131 | return filestream_getc(stream); |
| 132 | } |
| 133 | |
| 134 | int64_t rfwrite(void const* buffer, |
| 135 | size_t elem_size, size_t elem_count, RFILE* stream) |
| 136 | { |
| 137 | if (!stream || (elem_size == 0) || (elem_count == 0)) |
| 138 | return 0; |
| 139 | |
| 140 | return (filestream_write(stream, buffer, elem_size * elem_count) / elem_size); |
| 141 | } |
| 142 | |
| 143 | int rfputc(int character, RFILE * stream) |
| 144 | { |
| 145 | if (!stream) |
| 146 | return EOF; |
| 147 | |
| 148 | return filestream_putc(stream, character); |
| 149 | } |
| 150 | |
| 151 | int64_t rfflush(RFILE * stream) |
| 152 | { |
| 153 | if (!stream) |
| 154 | return EOF; |
| 155 | |
| 156 | return filestream_flush(stream); |
| 157 | } |
| 158 | |
| 159 | int rfprintf(RFILE * stream, const char * format, ...) |
| 160 | { |
| 161 | int result; |
| 162 | va_list vl; |
| 163 | |
| 164 | if (!stream) |
| 165 | return -1; |
| 166 | |
| 167 | va_start(vl, format); |
| 168 | result = filestream_vprintf(stream, format, vl); |
| 169 | va_end(vl); |
| 170 | return result; |
| 171 | } |
| 172 | |
| 173 | int rferror(RFILE* stream) |
| 174 | { |
| 175 | return filestream_error(stream); |
| 176 | } |
| 177 | |
| 178 | int rfeof(RFILE* stream) |
| 179 | { |
| 180 | return filestream_eof(stream); |
| 181 | } |
| 182 | |
| 183 | int rfscanf(RFILE * stream, const char * format, ...) |
| 184 | { |
| 185 | int result; |
| 186 | va_list vl; |
| 187 | |
| 188 | if (!stream) |
| 189 | return 0; |
| 190 | |
| 191 | va_start(vl, format); |
| 192 | result = filestream_vscanf(stream, format, &vl); |
| 193 | va_end(vl); |
| 194 | return result; |
| 195 | } |