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| author | nc <charles.saternos@gmail.com> | 2019-05-18 12:25:44 -0400 |
|---|---|---|
| committer | nc <charles.saternos@gmail.com> | 2019-05-18 12:25:44 -0400 |
| commit | 426e05542a76f22e0fe575d8f9e2081f9203f438 (patch) | |
| tree | 8c7167a28d5c925b19becefe9a8a20aa46f081c0 /subx/apps/dquotes.subx | |
| parent | ba9ed69c238d2049b8288a32dd5dfa5626db6d86 (diff) | |
| download | mu-426e05542a76f22e0fe575d8f9e2081f9203f438.tar.gz | |
implement skip-string-in-slice and reimplement skip-string in terms of skip-string-in-slice
Diffstat (limited to 'subx/apps/dquotes.subx')
| -rw-r--r-- | subx/apps/dquotes.subx | 112 |
1 files changed, 75 insertions, 37 deletions
diff --git a/subx/apps/dquotes.subx b/subx/apps/dquotes.subx index 058b4d58..513b5afb 100644 --- a/subx/apps/dquotes.subx +++ b/subx/apps/dquotes.subx @@ -2060,51 +2060,39 @@ skip-string: # line : (address stream) 50/push-EAX 51/push-ECX 52/push-EDX - 53/push-EBX - # EDX = line - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . 2/r32/EDX 8/disp8 . # copy *(EBP+8) to EDX + # ECX = line + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX - # ECX = line->read - 8b/copy 1/mod/*+disp8 2/rm32/EDX . . 1/r32/ECX 4/disp8 . # copy *(EDX+4) to ECX + # skip-string-in-slice(&line->data[line->read], &line->data[line->end]) + # . push &line->data[line->end] + # . . EDX = line->end + 8b/copy 1/mod/*+disp8 1/rm32/ECX . . 2/r32/EDX 8/disp8 . # copy *(ECX+8) to EDX + # . . EDX = &line->data[line->end] + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 1/base/ECX 2/index/EDX . 2/r32/EDX 0xc/disp8 . # copy ECX+EDX+12 to EDX + # . . push EDX + 52/push-EDX - # EAX = 0 - 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX - # loop: -$skip-string:loop: - # ECX++ - 41/increment-ECX # ECX++ + # . push &line->data[line->read] + # . . EDX = line->read + 8b/copy 1/mod/*+disp8 1/rm32/ECX . . 2/r32/EDX 4/disp8 . # copy *(ECX+4) to EDX + # . . EDX = &line->data[line->read] + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 1/base/ECX 2/index/EDX . 2/r32/EDX 0xc/disp8 . # copy ECX+EDX+12 to EDX + # . . push EDX + 52/push-EDX - # EAX = *((char*) line->data/EDX[line->read/ECX]) - 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 2/base/EDX 1/index/ECX . 0/r32/EAX 0xc/disp8 . # copy *(EDX+ECX+12) to EBX - # if EAX == '\': - # goto escaped-char - 3d/compare-EAX-and 0x5c/imm32/backslash - 74/jump-if-equal $skip-string:escaped-char/disp8 - # else if EAX == '"': - # break - 3d/compare-EAX-and 0x22/imm32/double-quote - 74/jump-if-equal $skip-string:loop-end/disp8 - # else: - # continue loop - eb/jump $skip-string:loop/disp8 + e8/call skip-string-in-slice/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP -$skip-string:escaped-char: - # ECX++ (step over escaped charcter) - 41/increment-ECX # ECX++ - # continue loop - eb/jump $skip-string:loop/disp8 -$skip-string:loop-end: - # step over last '"' - # . ECX++ - 41/increment-ECX # ECX++ + # EAX = new-&line->data[line->read]/EAX - &line->data[line->read]/EDX + 2b/subtract 3/mod/direct 2/rm32/EDX . . . 0/r32/EAX . . # EAX = EAX - EDX - # line->read = ECX - 89/copy 1/mod/*+disp8 2/rm32/EDX . . . 1/r32/ECX 4/disp8 . # copy ECX to *(EDX+4) + # line/ECX->read = EDX + 89/copy 1/mod/*+disp8 1/rm32/ECX . . 0/r32/EAX 4/disp8 . # copy EAX to *(ECX+4) $skip-string:end: # . restore registers - 5b/pop-to-EBX 5a/pop-to-EDX 59/pop-to-ECX 58/pop-to-EAX @@ -2277,9 +2265,59 @@ skip-string-in-slice: # curr : (address byte), end : (address byte) -> new_curr # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + 52/push-EDX + 53/push-EBX + + # ECX = curr + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX + + # EDX = end + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . 2/r32/EDX 0xc/disp8 . # copy *(EBP+12) to EDX + + # EAX = 0 + 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX + # loop: +$skip-string-in-slice:loop: + # . ECX++ + 41/increment-ECX # ECX++ + + # . EAX = *((char*) ECX) + 8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX + # . if EAX == '\': + # . . goto escaped-char + 3d/compare-EAX-and 0x5c/imm32/backslash + 74/jump-if-equal $skip-string-in-slice:escaped-char/disp8 + # . else if EAX == '"': + # . . break + 3d/compare-EAX-and 0x22/imm32/double-quote + 74/jump-if-equal $skip-string-in-slice:loop-end/disp8 + # . else: + # . . continue loop + eb/jump $skip-string-in-slice:loop/disp8 + +$skip-string-in-slice:escaped-char: + # . ECX++ (step over escaped charcter) + 41/increment-ECX # ECX++ + # . continue loop + eb/jump $skip-string-in-slice:loop/disp8 +$skip-string-in-slice:loop-end: + # step over last '"' + # . ECX++ + 41/increment-ECX # ECX++ + + # EAX = ECX for return + 89/copy 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # copy ECX to EAX + + $skip-string-in-slice:end: # . restore registers + 5b/pop-to-EBX + 5a/pop-to-EDX + 59/pop-to-ECX + # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP @@ -2323,7 +2361,7 @@ test-skip-string-in-slice-ignores-spaces: 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup: (EAX..ECX) = "\"a b\"/yz" - b8/copy-to-EAX "\"abc\" def"/imm32 + b8/copy-to-EAX "\"a b\"/yz"/imm32 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX 05/add-to-EAX 4/imm32 |