some parse-number cleanup, documentation work
Slava Pestov
parent
34041bedbf
commit
1d924271d4
107
README.txt
107
README.txt
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@ -20,12 +20,27 @@ Primitive words have an implementation coded in the host language (C or
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Java). Compound words are executed by invoking the interpreter
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recursively on their definition, which is also a linked list.
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* A note about code examples
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Factor words are separated out into multiple ``vocabularies''. Each code
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example given here is preceeded with a series of declarations, such as
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the following:
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USE: math
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USE: streams
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When entering code at the interactive interpreter loop, most
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vocabularies are already in the search path, and the USE: declarations
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can be omitted. However, in a source file they must all be specified, by convention at the beginning of the file.
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* Control flow
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Control flow rests on two basic concepts: recursion, and branching.
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Words with compound definitions may refer to themselves, and there is
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exactly one primitive for performing conditional execution:
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USE: combinators
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1 10 < [ "10 is less than 1." print ] [ "whoa!" print ] ifte
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==> 10 is less than 1.
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@ -43,6 +58,8 @@ Here is an example of a word that uses these two concepts:
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An example:
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USE: lists
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3 [ 1 2 3 4 ] contains?
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==> [ 3 4 ]
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5 [ 1 2 3 4 ] contains?
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@ -51,7 +68,7 @@ An example:
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It recurses down the list, until it reaches the end, in which case the
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outer ifte's 'false' branch is executed.
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A quick overview of the words used here:
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A quick overview of the words used here, along with their stack effects:
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Shuffle words:
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@ -74,6 +91,9 @@ functions, are usually built with the help of another primitive that
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simply executes a quotation at the top of the stack, removing it from
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the stack:
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USE: math
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USE: prettyprint
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[ 2 2 + . ] call
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==> 4
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@ -94,6 +114,10 @@ a list. Note that it uses 'call' to execute the given quotation:
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An example:
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USE: lists
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USE: math
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USE: stack
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[ 1 2 3 4 ] [ dup * . ] each
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==> 1
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4
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@ -113,8 +137,8 @@ tuck ( x y -- y x y )
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>r ( x -- r:x ) - move top of data stack to/from 'extra hand'.
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r> ( r:x -- x )
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Writing >r foo r> is analogous to [ foo ] in Joy. Occurrences of >r and
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r> must be balanced within a single word definition.
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Writing >r foo r> is analogous to '[ foo ] dip' in Joy. Occurrences of
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>r and r> must be balanced within a single word definition.
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Linked list deconstruction:
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@ -122,7 +146,80 @@ uncons ( [ x | y ] -- x y )
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* Variables
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* Continuations
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Factor supports a notion of ``variables''. Whereas the stack is used for
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transient, intermediate values, variables are used for more permanent
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data.
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* Reflection
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Variables are retreived and stored using the 'get' and 'set' words. For
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example:
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USE: math
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USE: namespaces
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USE: prettyprint
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"~" get .
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==> "/home/slava"
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5 "x" set
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"x" get 2 * .
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==> 10
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The set of available variables is determined using ``dynamic scope''.
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A ``namespace'' is a set of variable name/value pairs. Namespaces can be
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pushed onto the ``name stack'', and later popped. The 'get' word
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searches all namespaces on the namestack in turn. The 'set' word stores
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a variable value into the namespace at the top of the name stack.
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While it is possible to push/pop the namestack directly using the words
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>n and n>, most of the time using the 'bind' combinator is more
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desirable.
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Good examples of namespace use are found in the I/O system.
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Factor provides two sets of words for working with I/O streams: words
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whose stream operand is specified on the stack (freadln, fwrite,
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fprint...) and words that use the standard input/output stream (read,
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write, print...).
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An I/O stream is a namespace with a slot for each I/O operation. I/O
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operations taking an explicit stream operand are all defined as follows:
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: freadln ( stream -- string )
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[ "freadln" get call ] bind ;
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: fwrite ( string stream -- )
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[ "fwrite" get call ] bind ;
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: fclose ( stream -- )
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[ "fclose" get call ] bind ;
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( ... et cetera )
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The second set of I/O operations, whose stream is the implicit 'standard
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input/output' stream, are defined as follows:
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: read ( -- string )
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"stdio" get freadln ;
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: write ( string -- )
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"stdio" get fwrite ;
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( ... et cetera )
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In the global namespace, the 'stdio' variable corresponds to a stream
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whose operations read/write from the standard file descriptors 0 and 1.
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However, the 'with-stream' combinator provides a way to rebind the
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standard input/output stream for the duration of the execution of a
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single quotation. The following example writes the source of a word
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definition to a file named 'definition.txt':
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USE: prettyprint
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USE: streams
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"definition.txt" <filebw> [ "with-stream" see ] with-stream
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The 'with-stream' word is implemented by pushing a new namespace on the
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namestack, setting the 'stdio' variable therein, and execution the given
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quotation.
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@ -1,10 +1,16 @@
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[error] SideKick$BufferChangeHandler: We have cplusplus.xml (/home/slava/jEdit/modes/) but got event for DefaultInputHandler.java (/home/slava/jEdit/org/gjt/sp/jedit/gui/)
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[error] SideKick$BufferChangeHandler: We have cplusplus.xml (/home/slava/jEdit/modes/) but got event for DefaultInputHandler.java (/home/slava/jEdit/org/gjt/sp/jedit/gui/)
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- dec> bin> oct> hex> throw errors
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- parse-number doesn't
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- eval with multilien strings and #!
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- redefining a word doesn't clear comments
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- quit responder breaks with multithreading
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- nicer way to combine two paths
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- don't show listener on certain commands
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- plugin should not exit jEdit on fatal errors
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- wordpreview: don't show for string literals and comments
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- alist -vs- assoc terminology
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- NPE in activate()/deactivate()
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- write-icon kind of messy; " " should be output by the listener
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- f usages. --> don't print all words
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- file responder: don't show full path in title
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@ -13,7 +19,6 @@
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- jedit ==> jedit-word, jedit takes a file name
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- introduce ifte* and ?str-head/?str-tail where appropriate
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- namespace clone drops static var bindings
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- when running (inf, .factor-rc not loaded
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+ bignums:
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@ -26,7 +31,9 @@
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+ docs:
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- examples of assoc usage
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- explain how log uses >polar and rect>
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- when* unless*
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- simple i/o section
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- unparse examples, and difference from prettyprint
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- review doc formatting with latex2html
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- recursion -vs- iteration in vectors chapter, and combinator
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@ -56,6 +56,7 @@
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<include name="org/**/*.class"/>
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<include name="*.factor"/>
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<include name="doc/**/*.html"/>
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<include name="doc/**/*.png"/>
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<include name="doc/*.html"/>
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<include name="Factor.manifest"/>
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</fileset>
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File diff suppressed because it is too large
Load Diff
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@ -3,7 +3,7 @@
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plugin.factor.jedit.FactorPlugin.activate=startup
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plugin.factor.jedit.FactorPlugin.name=Factor
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plugin.factor.jedit.FactorPlugin.version=0.65
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plugin.factor.jedit.FactorPlugin.version=0.66
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plugin.factor.jedit.FactorPlugin.author=Slava Pestov
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plugin.factor.jedit.FactorPlugin.docs=/doc/jedit/index.html
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@ -32,95 +32,41 @@ USE: html
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USE: lists
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USE: logic
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USE: kernel
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USE: math
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USE: namespaces
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USE: parser
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USE: regexp
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USE: stdio
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USE: stack
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USE: strings
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USE: words
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USE: httpd
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USE: httpd-responder
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: wiki-word-regexp ( -- regexp )
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"((?:[A-Z][a-z0-9]*){2,})" ;
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: wiki-word? ( word -- ? )
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wiki-word-regexp re-matches ;
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: wiki-word-links ( str -- str )
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wiki-word-regexp "$1" "$1" re-replace ;
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: get-wiki-page ( name -- text )
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"wiki" get [ get ] bind ;
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: write-wiki-page ( text -- )
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[ chars>entities wiki-word-links write ] call ;
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: wiki-nodes ( -- alist )
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"wiki" get [ vars-values ] bind ;
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: search-wiki ( string -- alist )
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wiki-nodes [ dupd cdr str-contains? ] subset nip ;
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: get-category-text ( category -- text )
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<% search-wiki [ car % "\n" % ] each %> ;
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: serve-category-page ( name text -- )
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swap [ write-wiki-page ] html-document ;
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: wiki-footer ( name -- )
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"<hr>" print
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"Edit" swap "edit?" swap cat2 write ;
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: serve-existing-page ( name text -- )
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over [ write-wiki-page wiki-footer ] html-document ;
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: wiki-editor ( name text -- )
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"<form action='" write
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swap write
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"' method='post'>" print
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"<textarea name='text' cols='64' rows='16'>" write
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[ chars>entities write ] when*
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"</textarea><p>" print
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"<input type='Submit' value='Submit'></form>" write ;
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: serve-edit-page ( name text -- )
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over [
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over wiki-word? [
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wiki-editor
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] [
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drop "Not a wiki word: " write write
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] ifte
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] html-document ;
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: wiki-get-responder ( argument -- )
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serving-html
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dup "edit?" str-head? dup [
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nip dup get-wiki-page serve-edit-page
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] [
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drop dup "Category" str-head? [
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dup get-category-text serve-category-page
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] [
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dup get-wiki-page dup [
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serve-existing-page
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] [
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serve-edit-page
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] ifte
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] ifte
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] ifte ;
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: set-wiki-page ( name text -- )
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"wiki" get [ put ] bind ;
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: wiki-post-responder ( argument -- )
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#! Handle a page edit.
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"response" get dup [
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"text=" str-head? dup [
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2dup set-wiki-page serve-existing-page
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] [
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2drop bad-request
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] ifte
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] [
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2drop bad-request
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] ifte ;
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! : wiki-word? ( word -- ? )
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! #! A WikiWord starts with a capital and contains more than
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! #! one capital letter.
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! dup str-length 0 > [
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! 0 over str-nth LETTER? [
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! 0 swap [ LETTER? [ succ ] when ] str-each 1 = not
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! ] [
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! drop f
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! ] ifte
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! ] [
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! drop f
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! ] ifte ;
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!
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! : wiki-formatting ( str -- )
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! #! If a word with this name exists in the wiki-formatting
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! #! vocabulary, its a special text style sequence.
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! [ "wiki-formatting" ] search ;
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!
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! : (wiki-parser) ( text -- )
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! [
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! scan dup wiki-word? [
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! <a href= dup a> write </a>
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! ] [
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! write
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! ] ifte " " write
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! ] with-parser ;
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@ -39,15 +39,13 @@ USE: stack
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jinvoke-static ;
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: (pipe) ( args -- process )
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f cwd <file> jvm-runtime
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[
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[ "java.lang.String" ]
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[ "java.lang.String" ]
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"java.io.File"
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] "java.lang.Runtime" "exec" jinvoke ;
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jvm-runtime
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[ [ "java.lang.String" ] ]
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"java.lang.Runtime" "exec" jinvoke ;
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: close-stderr ( process -- )
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[ ] "java.lang.Process" "getErrorStream" jinvoke close ;
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[ ] "java.lang.Process" "getErrorStream" jinvoke
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close-java-stream ;
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: pipe ( args -- stream )
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#! Start a process, and return a stream for communicating
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@ -35,7 +35,7 @@ USE: namespaces
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USE: stack
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USE: strings
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: close ( stream -- )
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: close-java-stream ( stream -- )
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[
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[ "java.io.InputStream" is ] [
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[ ] "java.io.InputStream" "close" jinvoke
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@ -97,8 +97,8 @@ USE: strings
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"out" get [ ] "java.io.OutputStream" "flush" jinvoke ;
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: <byte-stream>/fclose ( -- )
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"in" get [ close ] when*
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"out" get [ close ] when* ;
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"in" get [ close-java-stream ] when*
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"out" get [ close-java-stream ] when* ;
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: <bin> ( in -- in )
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[ "java.io.InputStream" ] "java.io.BufferedInputStream" jnew ;
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@ -150,8 +150,8 @@ USE: strings
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"out" get [ ] "java.io.Writer" "flush" jinvoke ;
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: <char-stream>/fclose ( -- )
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"in" get [ close ] when*
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"out" get [ close ] when* ;
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"in" get [ close-java-stream ] when*
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"out" get [ close-java-stream ] when* ;
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: <char-stream> ( in out -- stream )
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#! Creates a new stream for reading from the
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@ -50,52 +50,37 @@ USE: unparser
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[ drop t ] [ not-a-number ]
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] cond ;
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: >digit ( n -- ch )
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dup 10 < [ CHAR: 0 + ] [ 10 - CHAR: a + ] ifte ;
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: digit ( num digit base -- num )
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2dup <= [ rot * + ] [ not-a-number ] ifte ;
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: digit ( num digit -- num )
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"base" get swap 2dup > [
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>r * r> +
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] [
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not-a-number
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] ifte ;
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: (str>integer) ( str -- num )
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dup str-length 0 = [
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: (str>integer) ( str base -- num )
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over str-length 0 = [
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not-a-number
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] [
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0 swap [ digit> digit ] str-each
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0 rot [ digit> pick digit ] str-each nip
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] ifte ;
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: str>integer ( str -- num )
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#! Parse a string representation of an integer.
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dup str-length 0 = [
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drop not-a-number
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: str>integer ( str base -- num )
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swap "-" ?str-head [
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swap (str>integer) neg
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] [
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dup "-" str-head? dup [
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nip (str>integer) neg
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] [
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drop (str>integer)
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] ifte
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swap (str>integer)
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] ifte ;
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: str>ratio ( str -- num )
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dup CHAR: / index-of str//
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swap str>integer swap str>integer / ;
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swap 10 str>integer swap 10 str>integer / ;
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: str>number ( str -- num )
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#! Affected by "base" variable.
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[
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[ "/" swap str-contains? ] [ str>ratio ]
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[ "." swap str-contains? ] [ str>float ]
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[ drop t ] [ str>integer ]
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[ drop t ] [ 10 str>integer ]
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] cond ;
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: base> ( str base -- num/f )
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[
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"base" set
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[ str>number ] [ [ drop f ] when ] catch
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] with-scope ;
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[ str>integer ] [ [ 2drop f ] when ] catch ;
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: bin> ( str -- num )
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#! Convert a binary string to a number.
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@ -114,4 +99,5 @@ USE: unparser
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16 base> ;
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! Something really sucks about these words here
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: parse-number ( str -- num ) dec> ;
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: parse-number ( str -- num )
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[ str>number ] [ [ drop f ] when ] catch ;
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@ -63,7 +63,7 @@ USE: unparser
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: } nreverse list>vector parsed ; parsing
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! Do not execute parsing word
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: POSTPONE: ( -- ) scan parse-word parsed ; parsing
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: POSTPONE: ( -- ) scan-word parsed ; parsing
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! Colon defs
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: CREATE
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@ -186,7 +186,7 @@ USE: unparser
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: BASE: ( base -- )
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#! Read a number in a specific base.
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"base" get >r "base" set scan number, r> "base" set ;
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scan swap str>integer parsed ;
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: HEX: 16 BASE: ; parsing
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: DEC: 10 BASE: ; parsing
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@ -61,9 +61,19 @@ USE: unparser
|
|||
#! read ahead in the input stream.
|
||||
t "parsing" word set-word-property ;
|
||||
|
||||
: <parsing "line" set 0 "col" set ;
|
||||
: parsing> "line" off "col" off ;
|
||||
: end? ( -- ? ) "col" get "line" get str-length >= ;
|
||||
: end? ( -- ? )
|
||||
"col" get "line" get str-length >= ;
|
||||
|
||||
: (with-parser) ( quot -- )
|
||||
end? [ drop ] [ [ call ] keep (with-parser) ] ifte ;
|
||||
|
||||
: with-parser ( text quot -- )
|
||||
#! Keep calling the quotation until we reach the end of the
|
||||
#! input.
|
||||
swap "line" set 0 "col" set
|
||||
(with-parser)
|
||||
"line" off "col" off ;
|
||||
|
||||
: ch ( -- ch ) "col" get "line" get str-nth ;
|
||||
: advance ( -- ) "col" succ@ ;
|
||||
|
||||
|
|
@ -116,12 +126,14 @@ USE: unparser
|
|||
r> substring
|
||||
] ifte ;
|
||||
|
||||
: parse-word ( str -- obj )
|
||||
: scan-word ( -- obj )
|
||||
scan dup [
|
||||
dup "use" get search dup [
|
||||
nip
|
||||
] [
|
||||
drop str>number
|
||||
] ifte ;
|
||||
] ifte
|
||||
] when ;
|
||||
|
||||
: parsed| ( obj -- )
|
||||
#! Some ugly ugly code to handle [ a | b ] expressions.
|
||||
|
|
@ -137,15 +149,12 @@ USE: unparser
|
|||
: parsed ( obj -- )
|
||||
over "|" = [ nip parsed| "]" expect ] [ swons ] ifte ;
|
||||
|
||||
: number, ( num -- )
|
||||
str>number parsed ;
|
||||
|
||||
: word, ( str -- )
|
||||
: (parse) ( str -- )
|
||||
[
|
||||
parse-word dup parsing? [ execute ] [ parsed ] ifte
|
||||
] when* ;
|
||||
|
||||
: (parse) <parsing [ end? not ] [ scan word, ] while parsing> ;
|
||||
scan-word [
|
||||
dup parsing? [ execute ] [ parsed ] ifte
|
||||
] when*
|
||||
] with-parser ;
|
||||
|
||||
: parse ( str -- code )
|
||||
#! Parse the string into a parse tree that can be executed.
|
||||
|
|
|
|||
|
|
@ -39,6 +39,9 @@ USE: stdio
|
|||
USE: strings
|
||||
USE: words
|
||||
|
||||
: >digit ( n -- ch )
|
||||
dup 10 < [ CHAR: 0 + ] [ 10 - CHAR: a + ] ifte ;
|
||||
|
||||
: integer% ( num radix -- )
|
||||
tuck /mod >digit % dup 0 > [
|
||||
swap integer%
|
||||
|
|
@ -118,6 +121,13 @@ DEFER: unparse
|
|||
#! output.
|
||||
"." over str-contains? [ ".0" cat2 ] unless ;
|
||||
|
||||
: unparse-unknown ( obj -- str )
|
||||
<% "#<" %
|
||||
dup type-of type-name %
|
||||
" @ " %
|
||||
address-of unparse %
|
||||
">" % %> ;
|
||||
|
||||
: unparse ( obj -- str )
|
||||
[
|
||||
[ t eq? ] [ drop "t" ]
|
||||
|
|
@ -128,5 +138,5 @@ DEFER: unparse
|
|||
[ float? ] [ unparse-float fix-float ]
|
||||
[ complex? ] [ unparse-complex ]
|
||||
[ string? ] [ unparse-str ]
|
||||
[ drop t ] [ <% "#<" % type-of type-name % ">" % %> ]
|
||||
[ drop t ] [ unparse-unknown ]
|
||||
] cond ;
|
||||
|
|
|
|||
|
|
@ -218,3 +218,8 @@ DEFER: prettyprint*
|
|||
: .s datastack . ;
|
||||
: .r callstack . ;
|
||||
: .c catchstack . ;
|
||||
|
||||
! For integers only
|
||||
: .b >bin print ;
|
||||
: .o >oct print ;
|
||||
: .h >hex print ;
|
||||
|
|
|
|||
|
|
@ -81,10 +81,11 @@ USE: streams
|
|||
#! Print a newline to standard output.
|
||||
"\n" write ;
|
||||
|
||||
: close ( -- )
|
||||
"stdio" get fclose ;
|
||||
|
||||
: with-stream ( stream quot -- )
|
||||
[
|
||||
swap "stdio" set [ "stdio" get fclose rethrow ] catch
|
||||
] with-scope ;
|
||||
[ swap "stdio" set [ close rethrow ] catch ] with-scope ;
|
||||
|
||||
: with-string ( quot -- str )
|
||||
#! Execute a quotation, and push a string containing all
|
||||
|
|
|
|||
|
|
@ -7,130 +7,130 @@ USE: unparser
|
|||
|
||||
[ f ]
|
||||
[ f ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "12345abcdef" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ t ]
|
||||
[ "-12" ]
|
||||
[ dec> 0 < ]
|
||||
[ parse-number 0 < ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "--12" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "-" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "e" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ "100.0" ]
|
||||
[ "1.0e2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ "-100.0" ]
|
||||
[ "-1.0e2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ "0.01" ]
|
||||
[ "1.0e-2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ "-0.01" ]
|
||||
[ "-1.0e-2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "-1e-2e4" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ "3.14" ]
|
||||
[ "3.14" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "." ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ ".e" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ "101.0" ]
|
||||
[ "1.01e2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ "-101.0" ]
|
||||
[ "-1.01e2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ "1.01" ]
|
||||
[ "101.0e-2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ "-1.01" ]
|
||||
[ "-101.0e-2" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
||||
[ 5 ]
|
||||
[ "10/2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ -5 ]
|
||||
[ "-10/2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ -5 ]
|
||||
[ "10/-2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ 5 ]
|
||||
[ "-10/-2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "10.0/2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "1e1/2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ f ]
|
||||
[ "e/2" ]
|
||||
[ dec> ]
|
||||
[ parse-number ]
|
||||
test-word
|
||||
|
||||
[ "33/100" ]
|
||||
[ "66/200" ]
|
||||
[ dec> unparse ]
|
||||
[ parse-number unparse ]
|
||||
test-word
|
||||
|
|
|
|||
Loading…
Reference in New Issue