ranger - mirror of ranger - a simple, vim-like file manager

	Commit message (Expand)	Author	Age	Files	Lines
*	Prefer VISUAL to EDITOR	toonn	2018-01-23	1	-1/+7
*	rifle: Add new option flag `-c`	Samuel Walladge	2017-02-05	1	-3/+8
*	doc/rifle.1: added whitespace at examples	hut	2013-02-18	1	-0/+4
*	doc/rifle.1: Added man page for rifle	hut	2013-02-18	1	-0/+120

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Mu - linux/braces.subx</title> <meta name="Generator" content="Vim/8.2"> <meta name="plugin-version" content="vim8.1_v2"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=,use_input_for_pc=fallback"> <meta name="colorscheme" content="minimal-light"> <style>  </style> <script>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/main/linux/braces.subx'>https://github.com/akkartik/mu/blob/main/linux/braces.subx</a> <pre id='vimCodeElement'> 1 # Structured control flow using break/loop rather than jump. 2 # 3 # To run (on Linux): 4 # $ ./translate_subx init.linux [012]*.subx subx-params.subx braces.subx 5 # $ mv a.elf braces 6 # 7 # Example 1: 8 # $ cat x.subx 9 # { 10 # 7c/jump-if-< break/disp8 11 # 74/jump-if-= loop/disp8 12 # } 13 # $ cat x.subx |braces 14 # @loop1: 15 # 7c/jump-if-< @break1/disp8 16 # 74/jump-if-= @loop1/disp8 17 # @break1: 18 # 19 # Example 2: 20 # $ cat x.subx 21 # { 22 # 7c/jump-if-< break/disp8 23 # } 24 # { 25 # 74/jump-if-= loop/disp8 26 # } 27 # $ cat x.subx |braces 28 # @loop1: 29 # 7c/jump-if-< @break1/disp8 30 # @break1: 31 # @loop2: 32 # 74/jump-if-= @loop2/disp8 33 # @break2: 34 # 35 # Example 3: 36 # $ cat x.subx 37 # { 38 # { 39 # 74/jump-if-= loop/disp8 40 # } 41 # 7c/jump-if-< loop/disp8 42 # } 43 # $ cat x.subx |braces 44 # @loop1: 45 # @loop2: 46 # 74/jump-if-= @loop2/disp8 47 # @break2: 48 # 7c/jump-if-< @loop1/disp8 49 # @break1: 50 51 == code 52 53 Entry: # run tests if necessary, a REPL if not 54 # . prologue 55 89/<- %ebp 4/r32/esp 56 # initialize heap 57 (<a href='104new-segment.subx.html#L40'>new-segment</a> *<a href='120allocate.subx.html#L34'>Heap-size</a> <a href='120allocate.subx.html#L27'>Heap</a>) 58 # if (argc <= 1) goto interactive 59 81 7/subop/compare *ebp 1/imm32 60 7e/jump-if-<= $subx-braces-main:interactive/disp8 61 # if (argv[1] != "test")) goto interactive 62 (<a href='103kernel-string-equal.subx.html#L31'>kernel-string-equal?</a> *(ebp+8) "test") # => eax 63 3d/compare-eax-and 0/imm32/false 64 74/jump-if-= $subx-braces-main:interactive/disp8 65 # 66 (run-tests) 67 # syscall(exit, *Num-test-failures) 68 8b/-> *<a href='102test.subx.html#L89'>Num-test-failures</a> 3/r32/ebx 69 eb/jump $subx-braces-main:end/disp8 70 $subx-braces-main:interactive: 71 (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L14'>Stdin</a> <a href='115write-byte.subx.html#L10'>Stdout</a>) 72 # syscall(exit, 0) 73 bb/copy-to-ebx 0/imm32 74 $subx-braces-main:end: 75 e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32 76 77 subx-braces: # in: (addr buffered-file), out: (addr buffered-file) 78 # pseudocode: 79 # var line: (stream byte 512) 80 # var label-stack: (stack int 32) # at most 32 levels of nesting 81 # var next-label-id: int = 1 82 # while true 83 # clear-stream(line) 84 # read-line-buffered(in, line) 85 # if (line->write == 0) break # end of file 86 # skip-chars-matching-whitespace(line) 87 # if line->data[line->read] == '{' 88 # print(out, "@loop" next-label-id ":\n") 89 # push(label-stack, next-label-id) 90 # ++next-label-id 91 # continue 92 # if line->data[line->read] == '}' 93 # var top = pop(label-stack) 94 # print(out, "@break" top ":\n") 95 # continue 96 # while true 97 # var word-slice: (addr slice) = next-word-or-string(line) 98 # if slice-empty?(word-slice) # end of line 99 # break 100 # if slice-starts-with?(word-slice, "#") # comment 101 # continue 102 # if slice-starts-with?(word-slice, "break/") 103 # var top = top(label-stack) 104 # print(out, "@break" top) 105 # word-slice->start += len("break") 106 # else if slice-starts-with?(word-slice, "loop/") 107 # var top = top(label-stack) 108 # print(out, "@loop" top) 109 # word-slice->start += len("loop") 110 # print(out, word-slice " ") 111 # print(out, "\n") 112 # flush(out) 113 # . prologue 114 55/push-ebp 115 89/<- %ebp 4/r32/esp 116 # . save registers 117 50/push-eax 118 51/push-ecx 119 52/push-edx 120 53/push-ebx 121 56/push-esi 122 57/push-edi 123 # esi = in 124 8b/-> *(ebp+8) 6/r32/esi 125 # var line/ecx: (stream byte 512) 126 81 5/subop/subtract %esp 0x200/imm32 127 68/push 0x200/imm32/length 128 68/push 0/imm32/read 129 68/push 0/imm32/write 130 89/<- %ecx 4/r32/esp 131 # var label-stack/edx: (stack int 32) 132 81 5/subop/subtract %esp 0x80/imm32 133 68/push 0x80/imm32/length 134 68/push 0/imm32/top 135 89/<- %edx 4/r32/esp 136 # var next-label-id/ebx: int = 1 137 c7 0/subop/copy %ebx 1/imm32 138 # var word-slice/edi: slice 139 68/push 0/imm32/end 140 68/push 0/imm32/start 141 89/<- %edi 4/r32/esp 142 $subx-braces:line-loop: 143 (<a href='106stream.subx.html#L17'>clear-stream</a> %ecx) 144 (<a href='122read-line.subx.html#L9'>read-line-buffered</a> %esi %ecx) 145 $subx-braces:check0: 146 # if (line->write == 0) break 147 81 7/subop/compare *ecx 0/imm32 148 0f 84/jump-if-= $subx-braces:break/disp32 149 (<a href='124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> %ecx) 150 $subx-braces:check-for-curly-open: 151 # if (line->data[line->read] != '{') goto next check 152 # . eax = line->data[line->read] 153 8b/-> *(ecx+4) 0/r32/eax 154 8a/copy-byte *(ecx+eax+0xc) 0/r32/AL 155 25/and-eax-with 0xff/imm32 156 # . if (eax != '{') continue 157 3d/compare-eax-and 0x7b/imm32/open-curly 158 0f 85/jump-if-!= $subx-braces:check-for-curly-closed/disp32 159 $subx-braces:emit-curly-open: 160 # print(out, "@loop" next-label-id ":") 161 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) "@loop") 162 (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %ebx) 163 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) ":") 164 # push(label-stack, next-label-id) 165 (<a href='203stack.subx.html#L114'>push</a> %edx %ebx) 166 # ++next-label-id 167 ff 0/subop/increment %ebx 168 # continue 169 e9/jump $subx-braces:next-line/disp32 170 $subx-braces:check-for-curly-closed: 171 # if (line->data[line->read] != '}') goto next check 172 3d/compare-eax-and 0x7d/imm32/close-curly 173 0f 85/jump-if-= $subx-braces:word-loop/disp32 174 $subx-braces:emit-curly-closed: 175 # eax = pop(label-stack) 176 (<a href='203stack.subx.html#L234'>pop</a> %edx) 177 # print(out, "@break" eax ":") 178 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) "@break") 179 (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %eax) 180 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) ":") 181 # continue 182 e9/jump $subx-braces:next-line/disp32 183 $subx-braces:word-loop: 184 (<a href='135next-word-or-string.subx.html#L8'>next-word-or-string</a> %ecx %edi) 185 $subx-braces:check1: 186 # if (slice-empty?(word-slice)) break 187 (<a href='123slice.subx.html#L9'>slice-empty?</a> %edi) 188 3d/compare-eax-and 0/imm32/false 189 0f 85/jump-if-!= $subx-braces:next-line/disp32 190 $subx-braces:check-for-comment: 191 # if (slice-starts-with?(word-slice, "#")) continue 192 # . eax = *word-slice->start 193 8b/-> *edi 0/r32/eax 194 8a/copy-byte *eax 0/r32/AL 195 25/and-eax-with 0xff/imm32 196 # . if (eax == '#') continue 197 3d/compare-eax-and 0x23/imm32/hash 198 74/jump-if-= $subx-braces:word-loop/disp8 199 $subx-braces:check-for-break: 200 # if (!slice-starts-with?(word-slice, "break/")) goto next check 201 # . eax = slice-starts-with?(word-slice, "break/") 202 (<a href='123slice.subx.html#L487'>slice-starts-with?</a> %edi "break/") 203 # . if (eax == false) goto next check 204 3d/compare-eax-and 0/imm32/false 205 74/jump-if-= $subx-braces:check-for-loop/disp8 206 $subx-braces:emit-break: 207 (<a href='203stack.subx.html#L338'>top</a> %edx) 208 # print(out, "@break" eax) 209 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) "@break") 210 (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %eax) 211 # word-slice->start += len("break") 212 81 0/subop/add *edi 5/imm32/strlen 213 # emit rest of word as usual 214 eb/jump $subx-braces:emit-word-slice/disp8 215 $subx-braces:check-for-loop: 216 # if (!slice-starts-with?(word-slice, "loop/")) emit word 217 # . eax = slice-starts-with?(word-slice, "loop/") 218 (<a href='123slice.subx.html#L487'>slice-starts-with?</a> %edi "loop/") 219 # . if (eax == false) goto next check 220 3d/compare-eax-and 0/imm32/false 221 74/jump-if-= $subx-braces:emit-word-slice/disp8 222 $subx-braces:emit-loop: 223 (<a href='203stack.subx.html#L338'>top</a> %edx) 224 # print(out, "@loop" eax) 225 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) "@loop") 226 (<a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a> *(ebp+0xc) %eax) 227 # word-slice->start += len("loop") 228 81 0/subop/add *edi 4/imm32/strlen 229 # fall through 230 $subx-braces:emit-word-slice: 231 # print(out, word-slice " ") 232 (<a href='123slice.subx.html#L908'>write-slice-buffered</a> *(ebp+0xc) %edi) 233 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <a href='102test.subx.html#L93'>Space</a>) 234 # loop to next word 235 e9/jump $subx-braces:word-loop/disp32 236 $subx-braces:next-line: 237 # print(out, "\n") 238 (<a href='116write-buffered.subx.html#L8'>write-buffered</a> *(ebp+0xc) <a href='102test.subx.html#L82'>Newline</a>) 239 # loop to next line 240 e9/jump $subx-braces:line-loop/disp32 241 $subx-braces:break: 242 (<a href='115write-byte.subx.html#L81'>flush</a> *(ebp+0xc)) 243 $subx-braces:end: 244 # . reclaim locals 245 81 0/subop/add %esp 0x29c/imm32 246 # . restore registers 247 5f/pop-to-edi 248 5e/pop-to-esi 249 5b/pop-to-ebx 250 5a/pop-to-edx 251 59/pop-to-ecx 252 58/pop-to-eax 253 # . epilogue 254 89/<- %esp 5/r32/ebp 255 5d/pop-to-ebp 256 c3/return 257 258 test-subx-braces-passes-most-words-through: 259 # . prologue 260 55/push-ebp 261 89/<- %ebp 4/r32/esp 262 # setup 263 (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a>) 264 (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a>) 265 (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer) 266 (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer) 267 # test 268 (<a href='108write.subx.html#L24'>write</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a> "== abcd 0x1") 269 (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L405'>_test-input-buffered-file</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>) 270 # check that the line just passed through 271 (<a href='115write-byte.subx.html#L81'>flush</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>) 272 +-- 5 lines: #? # dump _test-output-stream ---------------------------------------------------------------------------------------------------------------------------- 277 (<a href='109stream-equal.subx.html#L194'>check-stream-equal</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a> "== abcd 0x1 \n" "F - test-subx-braces-passes-most-words-through") 278 # . epilogue 279 89/<- %esp 5/r32/ebp 280 5d/pop-to-ebp 281 c3/return 282 283 test-subx-braces-1: 284 # input: 285 # { 286 # ab break/imm32 287 # cd loop/imm32 288 # } 289 # 290 # output: 291 # @loop1: 292 # ab @break1/imm32 293 # cd @loop1/imm32 294 # @break1: 295 # 296 # . prologue 297 55/push-ebp 298 89/<- %ebp 4/r32/esp 299 # setup 300 (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a>) 301 (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a>) 302 (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer) 303 (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer) 304 # test 305 (<a href='108write.subx.html#L24'>write</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a> "{\nab break/imm32\ncd loop/imm32\n}") 306 (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L405'>_test-input-buffered-file</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>) 307 # check that the line just passed through 308 (<a href='115write-byte.subx.html#L81'>flush</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>) 309 +-- 5 lines: #? # dump _test-output-stream ---------------------------------------------------------------------------------------------------------------------------- 314 (<a href='109stream-equal.subx.html#L194'>check-stream-equal</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a> "@loop0x00000001:\nab @break0x00000001/imm32 \ncd @loop0x00000001/imm32 \n@break0x00000001:\n" "F - test-subx-braces-1") 315 # . epilogue 316 89/<- %esp 5/r32/ebp 317 5d/pop-to-ebp 318 c3/return 319 320 test-subx-braces-2: 321 # input: 322 # { 323 # { 324 # ab break/imm32 325 # } 326 # cd loop/imm32 327 # } 328 # 329 # output: 330 # @loop1: 331 # @loop2: 332 # ab @break2/imm32 333 # @break2: 334 # cd @loop1/imm32 335 # @break1: 336 # 337 # . prologue 338 55/push-ebp 339 89/<- %ebp 4/r32/esp 340 # setup 341 (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a>) 342 (<a href='106stream.subx.html#L17'>clear-stream</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a>) 343 (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-input-buffered-file->buffer) 344 (<a href='106stream.subx.html#L17'>clear-stream</a> $_test-output-buffered-file->buffer) 345 # test 346 (<a href='108write.subx.html#L24'>write</a> <a href='112read-byte.subx.html#L331'>_test-input-stream</a> "{\n{\nab break/imm32\n}\ncd loop/imm32\n}") 347 (<a href='braces.subx.html#L77'>subx-braces</a> <a href='112read-byte.subx.html#L405'>_test-input-buffered-file</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>) 348 # check that the line just passed through 349 (<a href='115write-byte.subx.html#L81'>flush</a> <a href='115write-byte.subx.html#L425'>_test-output-buffered-file</a>) 350 +-- 5 lines: #? # dump _test-output-stream ---------------------------------------------------------------------------------------------------------------------------- 355 (<a href='109stream-equal.subx.html#L194'>check-stream-equal</a> <a href='115write-byte.subx.html#L287'>_test-output-stream</a> "@loop0x00000001:\n@loop0x00000002:\nab @break0x00000002/imm32 \n@break0x00000002:\ncd @loop0x00000001/imm32 \n@break0x00000001:\n" "F - test-subx-braces-2") 356 # . epilogue 357 89/<- %esp 5/r32/ebp 358 5d/pop-to-ebp 359 c3/return </pre> </body> </html>