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| <h1> words/char-scan.asm </h1> |
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| <a href="../WordList.en.html">Jump to Vocabulary</a> |
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| ; ( addr1 n1 c -- addr1 n2 ) String |
| ; R( -- ) |
| ; Scan string at addr1/n1 until first c, leaving addr1/n2, char at n2 is last non-c character |
| VE_CSCAN: |
| .db $05, "cscan" |
| .dw VE_HEAD |
| .set VE_HEAD = VE_CSCAN |
| XT_CSCAN: |
| .dw DO_COLON |
| PFA_CSCAN: |
| .dw XT_SWAP ; ( -- addr1 c n1 ) |
| .dw XT_DUP ; ( -- addr1 c n1 n1) |
| .dw XT_TO_R ; ( -- addr1 c n1) |
| .dw XT_ZERO ; ( -- addr1 c n1 0) |
| .dw XT_DODO ; ( -- addr1 c) |
| .dw PFA_CSCAN3 |
| PFA_CSCAN1: |
| .dw XT_OVER ; ( -- addr1 c addr1 ) |
| .dw XT_I ; ( -- addr1 c addr1 i) |
| .dw XT_PLUS ; ( -- addr1 c addr') |
| .dw XT_CFETCH ; ( -- addr1 c c') |
| .dw XT_OVER ; ( -- addr1 c c' c) |
| .dw XT_EQUAL ; ( -- addr1 c f) |
| .dw XT_DOCONDBRANCH ; ( -- addr1 c) |
| .dw PFA_CSCAN2 |
| .dw XT_DROP ; ( -- addr1 ) |
| .dw XT_I ; ( -- addr1 n2) |
| .dw XT_UNLOOP ; ( -- addr1 n2) |
| .dw XT_R_FROM ; ( -- addr1 n2 n1) |
| .dw XT_DROP ; ( -- addr1 n2) |
| .dw XT_EXIT |
| PFA_CSCAN2: |
| .dw XT_DOLOOP |
| .dw PFA_CSCAN1 ; ( -- addr1 c) |
| PFA_CSCAN3: |
| .dw XT_DROP ; ( -- addr1) |
| .dw XT_R_FROM ; ( -- addr1 n1) |
| .dw XT_EXIT |
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