| |
|
| \ .( 12may93jaw |
\ .( 12may93jaw |
| |
|
| : .( ( compilation "...<paren>" -- ) \ core-ext dot-paren |
: .( ( "ccc<paren>" -- ) \ core-ext dot-paren |
| |
\G Parse a string ccc delimited by a ) (right parenthesis). Display |
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\G the string. This is often used to display progress information |
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\G during compilation. See examples below. |
| [char] ) parse type ; immediate |
[char] ) parse type ; immediate |
| |
|
| \ VALUE 2>R 2R> 2R@ 17may93jaw |
\ VALUE 2>R 2R> 2R@ 17may93jaw |
| \ !! 2value |
\ !! 2value |
| |
|
| : 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal |
: 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal |
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\G Compile appropriate code such that, at run-time, cell pair w1, w2 are |
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\G placed on the stack. Interpretation semantics are undefined. |
| swap postpone Literal postpone Literal ; immediate restrict |
swap postpone Literal postpone Literal ; immediate restrict |
| |
|
| ' drop alias d>s ( d -- n ) \ double d_to_s |
' drop alias d>s ( d -- n ) \ double d_to_s |
| : CLiteral |
: CLiteral |
| postpone (c") here over char+ allot place align ; immediate restrict |
postpone (c") here over char+ allot place align ; immediate restrict |
| |
|
| : C" ( compilation "...<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote |
: C" ( compilation "ccc<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote |
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\G Compilation: parse a string ccc delimited by a " (double quote). At |
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\G run-time, return c-addr which specifies the counted string ccc. |
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\G Interpretation semantics are undefined. |
| [char] " parse postpone CLiteral ; immediate restrict |
[char] " parse postpone CLiteral ; immediate restrict |
| |
|
| \ [COMPILE] 17may93jaw |
\ [COMPILE] 17may93jaw |
| \ ERASE 17may93jaw |
\ ERASE 17may93jaw |
| |
|
| : erase ( addr len -- ) \ core-ext |
: erase ( addr len -- ) \ core-ext |
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\G If len>0, clear all bits in each location of a memory region |
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\G of len address units starting at address addr. |
| \ !! dependence on "1 chars 1 =" |
\ !! dependence on "1 chars 1 =" |
| ( 0 1 chars um/mod nip ) 0 fill ; |
( 0 1 chars um/mod nip ) 0 fill ; |
| : blank ( addr len -- ) \ string |
: blank ( addr len -- ) \ string |
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\G If len>0, store the character value for a space in each |
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\G location of a memory region |
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\G of len character units starting at address addr. |
| bl fill ; |
bl fill ; |
| |
|
| \ SEARCH 02sep94py |
\ SEARCH 02sep94py |
| |
|
| : search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string |
: search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string |
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\G Search the string specified by c-addr1, u1 for the string |
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\G speficied by c-addr2, u2. If flag is true: match was found |
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\G at c-addr3 with u3 characters remaining. If flag is false: |
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\G no match was found; c-addr3, u3 are equal to c-addr1, u1. |
| \ not very efficient; but if we want efficiency, we'll do it as primitive |
\ not very efficient; but if we want efficiency, we'll do it as primitive |
| 2>r 2dup |
2>r 2dup |
| begin |
begin |
| forth-wordlist set-current |
forth-wordlist set-current |
| THEN ; |
THEN ; |
| |
|
| : marker ( "mark" -- ) |
: marker ( "<spaces> name" -- ) \ core-ext |
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\G Create a definition, @var{name} (called a @var{mark}) whose |
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\G execution semantics are to remove itself and everything |
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\G defined after it. |
| marker, Create A, |
marker, Create A, |
| DOES> ( -- ) |
DOES> ( -- ) |
| @ marker! ; |
@ marker! ; |
