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<!-- Weave of 'Text From Files' generated by Inweb -->
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< ul class = "crumbs" > < li > < a href = "../index.html" > Home< / a > < / li > < li > < a href = "../services.html" > Services< / a > < / li > < li > < a href = "index.html" > words< / a > < / li > < li > < a href = "index.html#3" > Chapter 3: Words in Sequence< / a > < / li > < li > < b > Text From Files< / b > < / li > < / ul > < / div >
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< p class = "purpose" > This is where source text is read in, whether from extension files or from the main source text file, and fed into the lexer.< / p >
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< ul class = "toc" > < li > < a href = "3-tff.html#SP1" > § 1. Source files< / a > < / li > < li > < a href = "3-tff.html#SP2" > § 2. Feeding whole files into the lexer< / a > < / li > < / ul > < hr class = "tocbar" >
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< p class = "commentary firstcommentary" > < a id = "SP1" class = "paragraph-anchor" > < / a > < b > § 1. Source files. < / b > Each separate file of text read into the lexer has its identity docketed
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in a < span class = "extract" > < span class = "extract-syntax" > source_file< / span > < / span > structure, as follows.
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > typedef< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > name< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > words_of_source< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > word count, omitting comments and verbatim matter< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > text_read< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > words_of_quoted_text< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > word count for text in double-quotes< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > FILE< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > file handle while open< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > general_pointer< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > your_ref< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > for the client to attach some meaning< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CLASS_DEFINITION< / span >
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< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > ;< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > The structure source_file is private to this section.< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP2" class = "paragraph-anchor" > < / a > < b > § 2. Feeding whole files into the lexer. < / b > This is one of the two feeder routines for the lexer, the other being in
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Lexical Writing Back.w: see Lexer.w for its obligations.
< / p >
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< p class = "commentary" > We feed characters from an open file into the lexer, and continue until there
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is nothing left in it. Inform is used on operating systems which between them
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use all four of the sequences < span class = "extract" > < span class = "extract-syntax" > 0a< / span > < / span > , < span class = "extract" > < span class = "extract-syntax" > 0d< / span > < / span > , < span class = "extract" > < span class = "extract-syntax" > 0a0d< / span > < / span > and < span class = "extract" > < span class = "extract-syntax" > 0d0a< / span > < / span > to divide lines in
text files, so each of these is converted to a single < span class = "extract" > < span class = "extract-syntax" > '\n'< / span > < / span > . Tabs are treated
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as if spaces in most contexts, but not when parsing formatted tables, for
instance, so they are not similarly converted.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > TextFromFiles::feed_open_file_into_lexer< / span > < button class = "popup" onclick = "togglePopup('usagePopup1')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup1" > Usage of < span class = "code-font" > < span class = "function-syntax" > TextFromFiles::feed_open_file_into_lexer< / span > < / span > :< br / > < a href = "3-tff.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > FILE< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > leaf< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > documentation_only< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > general_pointer< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ref< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > CREATE< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > words_of_source< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > words_of_quoted_text< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > your_ref< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > ref< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > name< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > handle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > source_location< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > top_of_file< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > last_cr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > read_cr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > unicode_file_buffer< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ufb< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TextFiles::create_ufb< / span > < span class = "plain-syntax" > ();< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > top_of_file< / span > < span class = "plain-syntax" > .< / span > < span class = "element-syntax" > file_of_origin< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > top_of_file< / span > < span class = "plain-syntax" > .< / span > < span class = "element-syntax" > line_number< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 1< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-lxr.html#SP25" class = "function-link" > < span class = "function-syntax" > Lexer::feed_begins< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > top_of_file< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > documentation_only< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > lexer_wait_for_dashes< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > last_cr< / span > < span class = "plain-syntax" > = < / span > < span class = "character-syntax" > ' '< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > = < / span > < span class = "character-syntax" > ' '< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TextFiles::utf8_fgetc< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > handle< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > , & < / span > < span class = "identifier-syntax" > ufb< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > == < / span > < span class = "constant-syntax" > 0xFEFF< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TextFiles::utf8_fgetc< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > handle< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > , & < / span > < span class = "identifier-syntax" > ufb< / span > < span class = "plain-syntax" > ); < / span > < span class = "comment-syntax" > Unicode BOM code< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > != < / span > < span class = "identifier-syntax" > EOF< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > while< / span > < span class = "plain-syntax" > (((< / span > < span class = "identifier-syntax" > read_cr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TextFiles::utf8_fgetc< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > handle< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > , & < / span > < span class = "identifier-syntax" > ufb< / span > < span class = "plain-syntax" > )), < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > ) != < / span > < span class = "identifier-syntax" > EOF< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > last_cr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > read_cr< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > switch< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > case< / span > < span class = "plain-syntax" > < / span > < span class = "character-syntax" > '\x0a'< / span > < span class = "plain-syntax" > :< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > '\x0d'< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ; < / span > < span class = "reserved-syntax" > continue< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > suppress < / span > < span class = "extract" > < span class = "extract-syntax" > 0x000A< / span > < / span > < span class = "comment-syntax" > when it follows < / span > < span class = "extract" > < span class = "extract-syntax" > 0x000D< / span > < / span >
< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > = < / span > < span class = "character-syntax" > '\n'< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > and otherwise convert to < / span > < span class = "extract" > < span class = "extract-syntax" > '\n'< / span > < / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > case< / span > < span class = "plain-syntax" > < / span > < span class = "character-syntax" > '\x0d'< / span > < span class = "plain-syntax" > :< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > '\x0a'< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ; < / span > < span class = "reserved-syntax" > continue< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > suppress < / span > < span class = "extract" > < span class = "extract-syntax" > 0x000D< / span > < / span > < span class = "comment-syntax" > when it follows < / span > < span class = "extract" > < span class = "extract-syntax" > 0x000A< / span > < / span >
< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > = < / span > < span class = "character-syntax" > '\n'< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > and otherwise convert to < / span > < span class = "extract" > < span class = "extract-syntax" > '\n'< / span > < / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > default:< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > newline_char< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-lxr.html#SP26" class = "function-link" > < span class = "function-syntax" > Lexer::feed_triplet< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > last_cr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > cr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > next_cr< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > text_read< / span > < span class = "plain-syntax" > = < / span > < a href = "3-lxr.html#SP25" class = "function-link" > < span class = "function-syntax" > Lexer::feed_ends< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > leaf< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "named-paragraph-container code-font" > < a href = "3-tff.html#SP2_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Word count the new material< / span > < span class = "named-paragraph-number" > 2.1< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP2_1" class = "paragraph-anchor" > < / a > < b > § 2.1. < / b > We word count all source files, both as to their source text and their
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quoted text (i.e., their text within double-quotes).
< / p >
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< p class = "commentary" > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Word count the new material< / span > < span class = "named-paragraph-number" > 2.1< / span > < / span > < span class = "comment-syntax" > =< / span >
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_THROUGH_WORDING< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wc< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "identifier-syntax" > text_read< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > words_of_source< / span > < span class = "plain-syntax" > += < / span > < a href = "3-tff.html#SP4" class = "function-link" > < span class = "function-syntax" > TextFromFiles::word_count< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wc< / span > < span class = "plain-syntax" > );< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This code is used in < a href = "3-tff.html#SP2" > § 2< / a > .< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP3" class = "paragraph-anchor" > < / a > < b > § 3. < / b > A much simpler version:
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > TextFromFiles::feed_into_lexer< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > general_pointer< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ref< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > FILE< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Filenames::fopen< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "r"< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > = < / span > < a href = "3-tff.html#SP2" class = "function-link" > < span class = "function-syntax" > TextFromFiles::feed_open_file_into_lexer< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Filenames::get_leafname< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ), < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > ref< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > fclose< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > handle< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP4" class = "paragraph-anchor" > < / a > < b > § 4. < / b > < / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > TextFromFiles::word_count< / span > < button class = "popup" onclick = "togglePopup('usagePopup2')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup2" > Usage of < span class = "code-font" > < span class = "function-syntax" > TextFromFiles::word_count< / span > < / span > :< br / > < a href = "3-tff.html#SP2_1" > § 2.1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > wc< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > N< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > wchar_t< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > = < / span > < a href = "3-lxr.html#SP19" class = "function-link" > < span class = "function-syntax" > Lexer::word_text< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wc< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > '"'< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "comment-syntax" > inside quoted text, each run of non-whitespace counts as 1 word< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > ++; < / span > < span class = "comment-syntax" > skip opening quotation mark< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > while< / span > < span class = "plain-syntax" > (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > while< / span > < span class = "plain-syntax" > ((*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > ' '< / span > < span class = "plain-syntax" > ) || (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NEWLINE_IN_STRING< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > ++; < / span > < span class = "comment-syntax" > move past white space< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > ((*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > '"'< / span > < span class = "plain-syntax" > ) || (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > == < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )) < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > stop if this reaches the end< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > N< / span > < span class = "plain-syntax" > ++; < / span > < span class = "comment-syntax" > otherwise we have a word< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > while< / span > < span class = "plain-syntax" > ((*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "character-syntax" > ' '< / span > < span class = "plain-syntax" > ) & & (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "identifier-syntax" > NEWLINE_IN_STRING< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > & & (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "character-syntax" > '"'< / span > < span class = "plain-syntax" > ) & & (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > ++; < / span > < span class = "comment-syntax" > move to white space or end< / span >
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< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < span class = "comment-syntax" > outside quoted text, each lexer word not wholly composed of punctuation scores 1< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "3-lxr.html#SP19" class = "function-link" > < span class = "function-syntax" > Lexer::word< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wc< / span > < span class = "plain-syntax" > ) != < / span > < span class = "identifier-syntax" > PARBREAK_V< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (; *< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > ++)< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > ((< / span > < a href = "3-lxr.html#SP17" class = "function-link" > < span class = "function-syntax" > Lexer::is_punctuation< / span > < / a > < span class = "plain-syntax" > (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > ) == < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ) & & (*< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > != < / span > < span class = "character-syntax" > '|'< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > N< / span > < span class = "plain-syntax" > ++;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > N< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP5" class = "paragraph-anchor" > < / a > < b > § 5. < / b > At present, though, the only use made of these two word counts is via
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the following routine, which combines them into one.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > TextFromFiles::total_word_count< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > words_of_source< / span > < span class = "plain-syntax" > + < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > words_of_quoted_text< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > TextFromFiles::last_lexed_word< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < a href = "3-wrd.html#SP7" class = "function-link" > < span class = "function-syntax" > Wordings::last_wn< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "identifier-syntax" > text_read< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP6" class = "paragraph-anchor" > < / a > < b > § 6. < / b > Finally, we translate between the tiresomely many representations of
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files we seem to be stuck with. The method used by < span class = "extract" > < span class = "extract-syntax" > TextFromFiles::filename_to_source_file< / span > < / span >
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looks vulnerable to case-insensitive filename issues, but isn't, because
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each filename is present in Inform in only one form.
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "identifier-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > TextFromFiles::get_filename< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "tried to read filename of null source file"< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > name< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > TextFromFiles::filename_to_source_file< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > name2< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > l2< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Str::len< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name2< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_OVER< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > source_file< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name1< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name1< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > name< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > l1< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Str::len< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name1< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > minl< / span > < span class = "plain-syntax" > = (< / span > < span class = "identifier-syntax" > l1< / span > < span class = "plain-syntax" > < < / span > < span class = "identifier-syntax" > l2< / span > < span class = "plain-syntax" > )?< / span > < span class = "identifier-syntax" > l1:l2< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Str::suffix_eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name1< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > name2< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > minl< / span > < span class = "plain-syntax" > )) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > sf< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< nav role = "progress" > < div class = "progresscontainer" >
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< ul class = "progressbar" > < li class = "progressprev" > < a href = "3-wrd.html" > ❮ < / a > < / li > < li class = "progresschapter" > < a href = "P-wtmd.html" > P< / a > < / li > < li class = "progresschapter" > < a href = "1-wm.html" > 1< / a > < / li > < li class = "progresschapter" > < a href = "2-vcb.html" > 2< / a > < / li > < li class = "progresscurrentchapter" > 3< / li > < li class = "progresssection" > < a href = "3-lxr.html" > lxr< / a > < / li > < li class = "progresssection" > < a href = "3-wrd.html" > wrd< / a > < / li > < li class = "progresscurrent" > tff< / li > < li class = "progresssection" > < a href = "3-fds.html" > fds< / a > < / li > < li class = "progresssection" > < a href = "3-idn.html" > idn< / a > < / li > < li class = "progresschapter" > < a href = "4-ap.html" > 4< / a > < / li > < li class = "progressnext" > < a href = "3-fds.html" > ❯ < / a > < / li > < / ul > < / div >
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< / nav > <!-- End of weave -->
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< / main >
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< / body >
< / html >