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	Commit message (Expand)	Author	Age	Files	Lines
*	simplified all_tests.py, moved to test/	hut	2010-06-07	1	-2/+0
*	Fixed unittests	hut	2010-04-18	1	-0/+1
*	added copyright info to config files and test cases	hut	2010-03-08	1	-0/+15
*	tc_keyapi: updated testcase	hut	2010-02-25	1	-1/+1
*	fixed unit tests	hut	2010-01-20	1	-2/+2
*	random cleanups and fixes	hut	2010-01-07	1	-0/+1
*	test case for keyapi.Wrapper	hut	2009-12-27	1	-0/+24

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - 065write-buffered.subx</title> <meta name="Generator" content="Vim/8.1"> <meta name="plugin-version" content="vim8.1_v1"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal-light"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/master/065write-buffered.subx'>https://github.com/akkartik/mu/blob/master/065write-buffered.subx</a> <pre id='vimCodeElement'> 1 # write-buffered: like 'write', but for a buffered-file 2 3 == code 4 # instruction effective address register displacement immediate 5 # . op subop mod rm32 base index scale r32 6 # . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes 7 8 write-buffered: # f: (addr buffered-file), msg: (addr array byte) 9 # pseudocode: 10 # in = msg->data 11 # inend = &msg->data[msg->length] 12 # while (in < inend) 13 # if f->write >= f->length 14 # flush(f) 15 # clear-stream(f) 16 # c = *in 17 # f->data[f->write] = c 18 # ++f->write 19 # ++in 20 # 21 # registers: 22 # in: esi 23 # inend: ecx 24 # f: edi 25 # f->length: edx 26 # f->write: ebx (cached; need to keep in sync) 27 # c: eax 28 # 29 # . prologue 30 55/push-ebp 31 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp 32 # . save registers 33 50/push-eax 34 51/push-ecx 35 52/push-edx 36 53/push-ebx 37 56/push-esi 38 57/push-edi 39 # eax = msg 40 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 41 # var in/esi: (addr byte) = msg->data 42 8d/copy-address 1/mod/*+disp8 0/rm32/eax . . . 6/r32/esi 4/disp8 . # copy eax+4 to esi 43 # var inend/ecx: (addr byte) = &msg->data[msg->length] 44 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx 45 8d/copy-address 0/mod/indirect 4/rm32/sib 6/base/esi 1/index/ecx . 1/r32/ecx . . # copy esi+ecx to ecx 46 # edi = f 47 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 7/r32/edi 8/disp8 . # copy *(ebp+8) to edi 48 # edx = f->length 49 8b/copy 1/mod/*+disp8 7/rm32/edi . . . 2/r32/edx 0xc/disp8 . # copy *(edi+12) to edx 50 # ebx = f->write 51 8b/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 4/disp8 . # copy *(edi+4) to ebx 52 $write-buffered:loop: 53 # if (in >= inend) break 54 39/compare 3/mod/direct 6/rm32/esi . . . 1/r32/ecx . . # compare esi with ecx 55 73/jump-if-addr>= $write-buffered:loop-end/disp8 56 # if (f->write >= f->length) flush and clear f's stream 57 39/compare 3/mod/direct 3/rm32/ebx . . . 2/r32/edx . . # compare ebx with edx 58 7c/jump-if-< $write-buffered:to-stream/disp8 59 # . persist f->write 60 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 4/disp8 . # copy ebx to *(edi+4) 61 # . flush(f) 62 # . . push args 63 57/push-edi 64 # . . call 65 e8/call <a href='064write-byte.subx.html#L81'>flush</a>/disp32 66 # . . discard args 67 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 68 # . clear-stream(stream = f+4) 69 # . . push args 70 8d/copy-address 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy edi+4 to eax 71 50/push-eax 72 # . . call 73 e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32 74 # . . discard args 75 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 76 # . f->write must now be 0; update its cache at ebx 77 31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx 78 $write-buffered:to-stream: 79 # write to stream 80 # f->data[f->write] = *in 81 # . AL = *in 82 31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax 83 8a/copy-byte 0/mod/indirect 6/rm32/esi . . . 0/r32/AL . . # copy byte at *esi to AL 84 # . f->data[f->write] = AL 85 88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/edi 3/index/ebx . 0/r32/AL 0x10/disp8 . # copy AL to *(edi+ebx+16) 86 # ++f->write 87 43/increment-ebx 88 # ++in 89 46/increment-esi 90 eb/jump $write-buffered:loop/disp8 91 $write-buffered:loop-end: 92 # persist necessary variables from registers 93 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 4/disp8 . # copy ebx to *(edi+4) 94 $write-buffered:end: 95 # . restore registers 96 5f/pop-to-edi 97 5e/pop-to-esi 98 5b/pop-to-ebx 99 5a/pop-to-edx 100 59/pop-to-ecx 101 58/pop-to-eax 102 # . epilogue 103 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 104 5d/pop-to-ebp 105 c3/return 106 107 test-write-buffered: 108 # - check that write-buffered writes to the file 109 # setup 110 # . clear-stream(_test-stream) 111 # . . push args 112 68/push <a href='057write.subx.html#L148'>_test-stream</a>/imm32 113 # . . call 114 e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32 115 # . . discard args 116 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 117 # . clear-stream($_test-buffered-file->buffer) 118 # . . push args 119 68/push $_test-buffered-file->buffer/imm32 120 # . . call 121 e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32 122 # . . discard args 123 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 124 # write-buffered(_test-buffered-file, "Abc") 125 # . . push args 126 68/push "Abc"/imm32 127 68/push <a href='061read-byte.subx.html#L274'>_test-buffered-file</a>/imm32 128 # . . call 129 e8/call <a href='065write-buffered.subx.html#L8'>write-buffered</a>/disp32 130 # . . discard args 131 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 132 # flush(_test-buffered-file) 133 # . . push args 134 68/push <a href='061read-byte.subx.html#L274'>_test-buffered-file</a>/imm32 135 # . . call 136 e8/call <a href='064write-byte.subx.html#L81'>flush</a>/disp32 137 # . . discard args 138 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 139 # check-stream-equal(_test-stream, "Abc", msg) 140 # . . push args 141 68/push "F - test-write-buffered-single"/imm32 142 68/push "Abc"/imm32 143 68/push <a href='057write.subx.html#L148'>_test-stream</a>/imm32 144 # . . call 145 e8/call <a href='058stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 146 # . . discard args 147 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 148 # . end 149 c3/return 150 151 test-write-buffered-with-intermediate-flush: 152 # - check that write-buffered flushes in the middle if its buffer fills up 153 # setup 154 # . clear-stream(_test-stream) 155 # . . push args 156 68/push <a href='057write.subx.html#L148'>_test-stream</a>/imm32 157 # . . call 158 e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32 159 # . . discard args 160 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 161 # . clear-stream($_test-buffered-file->buffer) 162 # . . push args 163 68/push $_test-buffered-file->buffer/imm32 164 # . . call 165 e8/call <a href='055stream.subx.html#L17'>clear-stream</a>/disp32 166 # . . discard args 167 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp 168 # _test-stream can hold 8 bytes, but _test-buffered-file can hold only 6. 169 # Try to write 7 bytes. 170 # . write-buffered(_test-buffered-file, "Abcdefg") 171 # . . push args 172 68/push "Abcdefg"/imm32 173 68/push <a href='061read-byte.subx.html#L274'>_test-buffered-file</a>/imm32 174 # . . call 175 e8/call <a href='065write-buffered.subx.html#L8'>write-buffered</a>/disp32 176 # . . discard args 177 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp 178 # don't flush 179 # 6 bytes should still have gotten to _test-stream 180 # . check-ints-equal(*_test-stream->write, 6, msg) 181 # . . push args 182 68/push "F - <a href='065write-buffered.subx.html#L151'>test-write-buffered-with-intermediate-flush</a>: flushed data"/imm32 183 68/push 6/imm32 184 # . . push *_test-stream->write 185 b8/copy-to-eax <a href='057write.subx.html#L148'>_test-stream</a>/imm32 186 ff 6/subop/push 0/mod/indirect 0/rm32/eax . . . . . . # push *eax 187 # . . call 188 e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32 189 # . . discard args 190 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 191 # and 1 byte should still be in _test-buffered-file 192 # . check-ints-equal(*_test-buffered-file->write, 1, msg) 193 # . . push args 194 68/push "F - <a href='065write-buffered.subx.html#L151'>test-write-buffered-with-intermediate-flush</a>: unflushed bytes"/imm32 195 68/push 1/imm32 196 # . . push *_test-buffered-file->write 197 b8/copy-to-eax <a href='061read-byte.subx.html#L274'>_test-buffered-file</a>/imm32 198 ff 6/subop/push 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # push *(eax+4) 199 # . . call 200 e8/call <a href='051test.subx.html#L24'>check-ints-equal</a>/disp32 201 # . . discard args 202 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp 203 # . end 204 c3/return 205 206 == data 207 208 # The buffered file for standard error. 209 Stderr: # buffered-file 210 # file descriptor or (addr stream byte) 211 2/imm32 # standard error 212 $Stderr->buffer: 213 # inlined fields for a stream 214 # current write index 215 0/imm32 216 # current read index 217 0/imm32 218 # length 219 8/imm32 220 # data 221 00 00 00 00 00 00 00 00 # 8 bytes 222 223 # TODO: 8 bytes is too small. We'll need to grow the buffer for efficiency. But 224 # I don't want to type in 1024 bytes here. 225 226 # . . vim:nowrap:textwidth=0 </pre> </body> </html>