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<!-- Weave of 'Filenames' generated by Inweb -->
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< ul class = "crumbs" > < li > < a href = "../index.html" > Home< / a > < / li > < li > < a href = "index.html" > foundation< / a > < / li > < li > < a href = "index.html#3" > Chapter 3: The Operating System< / a > < / li > < li > < b > Filenames< / b > < / li > < / ul > < / div >
< p class = "purpose" > Names of hypothetical or real files in the filing system.< / p >
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< ul class = "toc" > < li > < a href = "3-fln.html#SP1" > § 1. Storage< / a > < / li > < li > < a href = "3-fln.html#SP2" > § 2. Creation< / a > < / li > < li > < a href = "3-fln.html#SP3" > § 3. Strings to filenames< / a > < / li > < li > < a href = "3-fln.html#SP4" > § 4. The writer< / a > < / li > < li > < a href = "3-fln.html#SP6" > § 6. Reading off the directory< / a > < / li > < li > < a href = "3-fln.html#SP7" > § 7. Reading off the leafname< / a > < / li > < li > < a href = "3-fln.html#SP8" > § 8. Filename extensions< / a > < / li > < li > < a href = "3-fln.html#SP9" > § 9. Guessing file formats< / a > < / li > < li > < a href = "3-fln.html#SP10" > § 10. Opening< / a > < / li > < li > < a href = "3-fln.html#SP11" > § 11. Comparing< / a > < / li > < li > < a href = "3-fln.html#SP12" > § 12. Timestamps and sizes< / a > < / li > < / ul > < hr class = "tocbar" >
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< p class = "commentary firstcommentary" > < a id = "SP1" > < / a > < b > § 1. Storage. < / b > Filename objects behave much like pathname ones, but they have their own
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structure in order that the two are distinct C types. Individual filenames
are a single instance of the following. (Note that the text part is stored
as Unicode code points, regardless of what text encoding the locale has.)
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< 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" > filename< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > leafname< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "constant-syntax" > CLASS_DEFINITION< / span >
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< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > ;< / span >
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< / pre >
< ul class = "endnotetexts" > < li > The structure filename is private to this section.< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP2" > < / a > < b > § 2. Creation. < / b > A filename is made by supplying a pathname and a leafname.
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::in< / 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" > Filenames::in< / span > < / span > :< br / > < a href = "3-fln.html#SP7" > § 7< / a > , < a href = "3-fln.html#SP8" > § 8< / a > < br / > Command Line Arguments - < a href = "3-cla.html#SP13_1_1" > § 13.1.1< / a > < br / > Epub Ebooks - < a href = "5-ee.html#SP6" > § 6< / a > , < a href = "5-ee.html#SP6_1" > § 6.1< / a > , < a href = "5-ee.html#SP6_2" > § 6.2< / a > , < a href = "5-ee.html#SP6_3" > § 6.3< / a > , < a href = "5-ee.html#SP7_2" > § 7.2< / a > , < a href = "5-ee.html#SP7_3" > § 7.3< / a > , < a href = "5-ee.html#SP7_4" > § 7.4< / a > < br / > Web Structure - < a href = "8-ws.html#SP7_3_3_2" > § 7.3.3.2< / a > , < a href = "8-ws.html#SP7_2_2_4" > § 7.2.2.4< / a > , < a href = "8-ws.html#SP8" > § 8< / a > < br / > Build Files - < a href = "8-bf.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > file_name< / 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-fln.html#SP2" class = "function-link" > < span class = "function-syntax" > Filenames::primitive< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > file_name< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > , < / span > < a href = "4-sm.html#SP8" class = "function-link" > < span class = "function-syntax" > Str::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > file_name< / 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 >
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< span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::primitive< / 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" > Filenames::primitive< / span > < / span > :< br / > < a href = "3-fln.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > from< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > to< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > pathname< / 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" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > CREATE< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > P< / 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" > to< / span > < span class = "plain-syntax" > -< / span > < span class = "identifier-syntax" > from< / 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" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "empty intermediate pathname"< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP2" class = "function-link" > < span class = "function-syntax" > Str::new_with_capacity< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > to< / span > < span class = "plain-syntax" > -< / span > < span class = "identifier-syntax" > from< / span > < span class = "plain-syntax" > +1);< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > string_position< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > S< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > from< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > from< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > < < / span > < span class = "identifier-syntax" > to< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ++, < / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP11" class = "function-link" > < span class = "function-syntax" > Str::forward< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > ))< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > PUT_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / span > < span class = "plain-syntax" > , < / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / 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 > < span class = "identifier-syntax" > F< / 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 = "SP3" > < / a > < b > § 3. Strings to filenames. < / b > The following takes a textual name and returns a filename.
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::from_text< / span > < button class = "popup" onclick = "togglePopup('usagePopup3')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup3" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::from_text< / span > < / span > :< br / > Pathnames - < a href = "3-pth.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > path< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > = -1;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_THROUGH_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > at< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > path< / 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 = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > at< / span > < span class = "plain-syntax" > ) == < / span > < span class = "constant-syntax" > FOLDER_SEPARATOR< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ++;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > P< / 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" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / 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" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PT< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < a href = "4-sm.html#SP26" class = "function-link" > < span class = "function-syntax" > Str::substr< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PT< / span > < span class = "plain-syntax" > , < / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > path< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ), < / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > path< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > ));< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > = < / span > < a href = "3-pth.html#SP5" class = "function-link" > < span class = "function-syntax" > Pathnames::from_text< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PT< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PT< / 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 = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < a href = "3-fln.html#SP2" class = "function-link" > < span class = "function-syntax" > Filenames::primitive< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > path< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > +1, < / span > < a href = "4-sm.html#SP8" class = "function-link" > < span class = "function-syntax" > Str::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > path< / 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 >
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< span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::from_text_relative< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > from< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > path< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > = < / span > < a href = "3-fln.html#SP3" class = "function-link" > < span class = "function-syntax" > Filenames::from_text< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > path< / span > < span class = "plain-syntax" > );< / span >
2020-04-21 16:55:17 +00:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > from< / 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" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > from< / span > < 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 = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / 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" > P< / span > < span class = "plain-syntax" > ) & & (< / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_parent< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_parent< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_parent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > from< / 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" > F< / 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" > < / a > < b > § 4. The writer. < / b > And conversely:
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::writer< / span > < button class = "popup" onclick = "togglePopup('usagePopup4')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup4" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::writer< / span > < / span > :< br / > Foundation Module - < a href = "1-fm.html#SP8_1" > § 8.1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > OUTPUT_STREAM< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > format_string< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > vF< / span > < span class = "plain-syntax" > ) {< / span >
2020-04-21 16:55:17 +00:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > = (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *) < / span > < span class = "identifier-syntax" > vF< / 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" > F< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > WRITE< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "< no file> "< / span > < 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 = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-pth.html#SP6" class = "function-link" > < span class = "function-syntax" > Pathnames::writer< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > OUT< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > format_string< / span > < span class = "plain-syntax" > , (< / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > *) < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > );< / span >
2020-04-21 16:55:17 +00:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > format_string< / span > < span class = "plain-syntax" > [0] == < / span > < span class = "character-syntax" > '/'< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > PUT< / span > < span class = "plain-syntax" > (< / span > < span class = "character-syntax" > '/'< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > PUT< / span > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > FOLDER_SEPARATOR< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > WRITE< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "%S"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / span > < span class = "plain-syntax" > );< / 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" > < / a > < b > § 5. < / b > And again relative to a given pathname:
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::to_text_relative< / span > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > OUTPUT_STREAM< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > P< / span > < span class = "plain-syntax" > ) {< / span >
2020-06-27 22:03:14 +00:00
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ft< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pt< / 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" > ft< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / 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" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pt< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%p"< / 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" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > n< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP8" class = "function-link" > < span class = "function-syntax" > Str::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pt< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > ((< / span > < a href = "4-sm.html#SP21" class = "function-link" > < span class = "function-syntax" > Str::prefix_eq< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ft< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > pt< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > n< / span > < span class = "plain-syntax" > )) & & (< / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get_at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ft< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > n< / span > < span class = "plain-syntax" > )==< / span > < span class = "constant-syntax" > FOLDER_SEPARATOR< / span > < span class = "plain-syntax" > )) {< / span >
< span class = "plain-syntax" > < / span > < a href = "4-sm.html#SP25" class = "function-link" > < span class = "function-syntax" > Str::delete_n_characters< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ft< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > n< / span > < span class = "plain-syntax" > +1);< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > WRITE< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "%S"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > ft< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "filename not relative to pathname"< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ft< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pt< / 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" > < / a > < b > § 6. Reading off the directory. < / b > < / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > pathname< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::up< / span > < button class = "popup" onclick = "togglePopup('usagePopup5')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup5" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::up< / span > < / span > :< br / > Pathnames - < a href = "3-pth.html#SP3" > § 3< / a > < br / > Web Structure - < a href = "8-ws.html#SP5_2" > § 5.2< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / 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" > F< / 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" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / 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 = "SP7" > < / a > < b > § 7. Reading off the leafname. < / b > < / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::without_path< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / 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-fln.html#SP2" class = "function-link" > < span class = "function-syntax" > Filenames::in< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::get_leafname< / span > < button class = "popup" onclick = "togglePopup('usagePopup6')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup6" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::get_leafname< / span > < / span > :< br / > HTML - < a href = "5-htm.html#SP15" > § 15< / a > < br / > Epub Ebooks - < a href = "5-ee.html#SP7_2_2_1" > § 7.2.2.1< / a > , < a href = "5-ee.html#SP7_2_2_2" > § 7.2.2.2< / a > , < a href = "5-ee.html#SP7_2_4" > § 7.2.4< / a > , < a href = "5-ee.html#SP7_3_2" > § 7.3.2< / a > , < a href = "5-ee.html#SP7_3_2_1" > § 7.3.2.1< / a > , < a href = "5-ee.html#SP7_3_2_2_1" > § 7.3.2.2.1< / a > , < a href = "5-ee.html#SP7_4" > § 7.4< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ) {< / span >
2020-04-21 16:55:17 +00:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / 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" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::write_unextended_leafname< / span > < button class = "popup" onclick = "togglePopup('usagePopup7')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup7" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::write_unextended_leafname< / span > < / span > :< br / > Epub Ebooks - < a href = "5-ee.html#SP5" > § 5< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > OUTPUT_STREAM< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ) {< / span >
2020-04-21 16:55:17 +00:00
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_THROUGH_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / 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" > c< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > );< / span >
2020-04-21 16:55:17 +00:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > c< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > '.'< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > PUT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > c< / span > < span class = "plain-syntax" > );< / 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 = "SP8" > < / a > < b > § 8. Filename extensions. < / b > The following is cautiously written because of an oddity in Windows's handling
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of filenames, which are allowed to have trailing dots or spaces, in a way
which isn't necessarily visible to the user, who may have added these by
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an accidental brush of the keyboard. Thus < span class = "extract" > < span class = "extract-syntax" > frog.jpg .< / span > < / span > should be treated
as equivalent to < span class = "extract" > < span class = "extract-syntax" > frog.jpg< / span > < / span > when deciding the likely file format.
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::write_extension< / span > < button class = "popup" onclick = "togglePopup('usagePopup8')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup8" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::write_extension< / span > < / span > :< br / > < a href = "3-fln.html#SP9" > § 9< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > OUTPUT_STREAM< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > on< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FALSE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_THROUGH_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / 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" > c< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / 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" > c< / span > < span class = "plain-syntax" > == < / span > < span class = "character-syntax" > '.'< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > on< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > TRUE< / 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" > on< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > PUT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > c< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::set_extension< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > extension< / 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" > NEWLEAF< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_THROUGH_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > leafname< / 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" > c< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / 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" > c< / span > < span class = "plain-syntax" > == < / span > < span class = "character-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 = "identifier-syntax" > PUT_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NEWLEAF< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > c< / span > < span class = "plain-syntax" > );< / 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 = "4-sm.html#SP8" class = "function-link" > < span class = "function-syntax" > Str::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > extension< / 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" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get_first_char< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > extension< / span > < span class = "plain-syntax" > ) != < / span > < span class = "character-syntax" > '.'< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NEWLEAF< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "."< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NEWLEAF< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%S"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > extension< / 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 = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > N< / span > < span class = "plain-syntax" > = < / span > < a href = "3-fln.html#SP2" class = "function-link" > < span class = "function-syntax" > Filenames::in< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pathname_of_location< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NEWLEAF< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NEWLEAF< / 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 > < 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 = "SP9" > < / a > < b > § 9. Guessing file formats. < / b > The following guesses the file format from its file extension:
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< / p >
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< pre class = "definitions code-font" > < span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_HTML< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 1< / span >
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< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_JPEG< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 2< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_PNG< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 3< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_OGG< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 4< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_AIFF< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 5< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_MIDI< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 6< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_MOD< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 7< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_GLULX< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 8< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_ZCODE< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 9< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_SVG< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 10< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_PERHAPS_GIF< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 11< / span >
< span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > FORMAT_UNRECOGNISED< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 0< / span >
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< / pre >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::guess_format< / span > < button class = "popup" onclick = "togglePopup('usagePopup9')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup9" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::guess_format< / span > < / span > :< br / > Epub Ebooks - < a href = "5-ee.html#SP7_2_2_3" > § 7.2.2.3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / 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" > EXT< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-fln.html#SP8" class = "function-link" > < span class = "function-syntax" > Filenames::write_extension< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > EXT< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / 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" > NORMALISED< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_THROUGH_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > EXT< / 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" > c< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > pos< / 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" > c< / span > < span class = "plain-syntax" > != < / span > < span class = "character-syntax" > ' '< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > PUT_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < a href = "4-chr.html#SP1" class = "function-link" > < span class = "function-syntax" > Characters::tolower< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > c< / 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" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > EXT< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_UNRECOGNISED< / 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 = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".html"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_HTML< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".htm"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_HTML< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".jpg"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_JPEG< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".jpeg"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_JPEG< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".png"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_PNG< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".ogg"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_OGG< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".aiff"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_AIFF< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".aif"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_AIFF< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".midi"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_MIDI< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".mid"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_MIDI< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".mod"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_MOD< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".svg"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_SVG< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP22" class = "function-link" > < span class = "function-syntax" > Str::eq_wide_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > ".gif"< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_GIF< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP8" class = "function-link" > < span class = "function-syntax" > Str::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / 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" > if< / span > < span class = "plain-syntax" > ((< / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )) == < / span > < span class = "character-syntax" > '.'< / span > < span class = "plain-syntax" > ) & & < / span >
< span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 1< / span > < span class = "plain-syntax" > )) == < / span > < span class = "character-syntax" > 'z'< / span > < span class = "plain-syntax" > ) & & < / span >
< span class = "plain-syntax" > (< / span > < a href = "4-chr.html#SP1" class = "function-link" > < span class = "function-syntax" > Characters::isdigit< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::at< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 2< / span > < span class = "plain-syntax" > )))) & & < / span >
< span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP8" class = "function-link" > < span class = "function-syntax" > Str::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > ) == < / span > < span class = "constant-syntax" > 3< / span > < span class = "plain-syntax" > ))< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_ZCODE< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP13" class = "function-link" > < span class = "function-syntax" > Str::get< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP11" class = "function-link" > < span class = "function-syntax" > Str::back< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-sm.html#SP10" class = "function-link" > < span class = "function-syntax" > Str::end< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / span > < span class = "plain-syntax" > ))) == < / span > < span class = "character-syntax" > 'x'< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FORMAT_PERHAPS_GLULX< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NORMALISED< / 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 > < span class = "identifier-syntax" > verdict< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
2020-04-24 23:06:02 +00:00
< p class = "commentary firstcommentary" > < a id = "SP10" > < / a > < b > § 10. Opening. < / b > These files are wrappers for < span class = "extract" > < span class = "extract-syntax" > fopen< / span > < / span > , the traditional C library call, but
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referring to the file by filename structure rather than a textual name. Note
that we must transcode the filename to whatever the locale expects before
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we call < span class = "extract" > < span class = "extract-syntax" > fopen< / span > < / span > , which is the main reason for the wrapper.
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > FILE< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::fopen< / span > < button class = "popup" onclick = "togglePopup('usagePopup10')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup10" > Usage of < span class = "code-font" > < span class = "function-syntax" > Filenames::fopen< / span > < / span > :< br / > Streams - < a href = "2-str.html#SP24" > § 24< / a > , < a href = "2-str.html#SP25" > § 25< / a > < br / > Text Files - < a href = "4-tf.html#SP1" > § 1< / a > , < a href = "4-tf.html#SP5_1" > § 5.1< / a > < br / > Binary Files - < a href = "6-bf.html#SP8" > § 8< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > usage< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > [4*< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / 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" > FN< / 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" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "4-sm.html#SP6" class = "function-link" > < span class = "function-syntax" > Str::copy_to_locale_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 4< / span > < span class = "plain-syntax" > *< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > FN< / 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 > < span class = "identifier-syntax" > fopen< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > usage< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > FILE< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Filenames::fopen_caseless< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > usage< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > [4*< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / 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" > FN< / 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" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "4-sm.html#SP6" class = "function-link" > < span class = "function-syntax" > Str::copy_to_locale_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 4< / span > < span class = "plain-syntax" > *< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > FN< / 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-cf.html#SP5" class = "function-link" > < span class = "function-syntax" > CIFilingSystem::fopen< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > usage< / 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 = "SP11" > < / a > < b > § 11. Comparing. < / b > Not as easy as it seems. The following is a slow but effective way to
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compare two filenames by seeing if they have the same canonical form
when printed out.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F1< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F2< / 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" > F1< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > F2< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > TRUE< / 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" > T1< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > T2< / 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" > T1< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F1< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > T2< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F2< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > = < / span > < a href = "4-sm.html#SP19" class = "function-link" > < span class = "function-syntax" > Str::eq< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > T1< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > T2< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > T1< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > T2< / 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 > < span class = "identifier-syntax" > rv< / 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 = "SP12" > < / a > < b > § 12. Timestamps and sizes. < / b > < / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "identifier-syntax" > time_t< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Filenames::timestamp< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > [4*< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / 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" > FN< / 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" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "4-sm.html#SP6" class = "function-link" > < span class = "function-syntax" > Str::copy_to_locale_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 4< / span > < span class = "plain-syntax" > *< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > time_t< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > t< / span > < span class = "plain-syntax" > = < / span > < a href = "1-wp.html#SP15" class = "function-link" > < span class = "function-syntax" > Platform::timestamp< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > FN< / 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 > < span class = "identifier-syntax" > t< / 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" > Filenames::size< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > [4*< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / 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" > FN< / 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" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < a href = "4-sm.html#SP6" class = "function-link" > < span class = "function-syntax" > Str::copy_to_locale_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > FN< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 4< / span > < span class = "plain-syntax" > *< / span > < span class = "constant-syntax" > MAX_FILENAME_LENGTH< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > t< / span > < span class = "plain-syntax" > = (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > ) < / span > < a href = "1-wp.html#SP15" class = "function-link" > < span class = "function-syntax" > Platform::size< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > transcoded_pathname< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > FN< / 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 > < span class = "identifier-syntax" > t< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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