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< / ul > < h2 > Foundation Module< / h2 > < ul >
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<!-- Weave of 'C Strings' 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#4" > Chapter 4: Text Handling< / a > < / li > < li > < b > C Strings< / b > < / li > < / ul > < / div >
< p class = "purpose" > A minimal library for handling C-style strings.< / p >
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< p class = "commentary firstcommentary" > < a id = "SP1" > < / a > < b > § 1. < / b > Programs using Foundation store text in < span class = "extract" > < span class = "extract-syntax" > text_stream< / span > < / span > structures almost all
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of the time, but old-style, null-terminated < span class = "extract" > < span class = "extract-syntax" > char *< / span > < / span > array strings are
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still occasionally needed.
< / p >
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< p class = "commentary" > We need to handle C strings long enough to contain any plausible filename, and
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any run of a dozen or so lines of code; but we have no real need to handle
strings of unlimited length, nor to be parsimonious with memory.
< / p >
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< p class = "commentary" > The following defines a type for a string long enough for our purposes.
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It should be at least as long as the constant sometimes called < span class = "extract" > < span class = "extract-syntax" > PATH_MAX< / span > < / span > ,
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the maximum length of a pathname, which is 1024 on Mac OS X.
< / p >
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< pre class = "definitions code-font" > < span class = "definition-keyword" > define< / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 8< / span > < span class = "plain-syntax" > *1024< / 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" > typedef< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > string< / span > < span class = "plain-syntax" > [< / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / span > < span class = "plain-syntax" > +1];< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP2" > < / a > < b > § 2. < / b > Occasionally we need access to the real, unbounded strlen:
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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" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > CStrings::strlen_unbounded< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > const< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / 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" > return< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > strlen< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > p< / 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. < / b > Any out-of-range access immediately halts the program; this is drastic, but
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an attempt to continue execution after a string overflow might conceivably
result in a malformatted shell command being passed to the operating system,
which we cannot risk.
< / 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" > CStrings::check_len< / 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" > CStrings::check_len< / span > < / span > :< br / > < a href = "4-cst.html#SP5" > § 5< / a > < / span > < / button > < 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 >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > ((< / span > < span class = "identifier-syntax" > n< / span > < span class = "plain-syntax" > > < / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / span > < span class = "plain-syntax" > ) || (< / span > < span class = "identifier-syntax" > n< / span > < span class = "plain-syntax" > < < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )) < / span > < a href = "3-em.html#SP2" class = "function-link" > < span class = "function-syntax" > Errors::fatal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "String overflow\n"< / 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 = "SP4" > < / a > < b > § 4. < / b > The following is then protected from reading out of range if given a
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non-terminated string, though this should never actually happen.
< / 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" > CStrings::len< / 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" > CStrings::len< / span > < / span > :< br / > < a href = "4-cst.html#SP5" > § 5< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > str< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > =0; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > < =< / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ++)< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > str< / 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 = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > str< / span > < span class = "plain-syntax" > [< / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / span > < span class = "plain-syntax" > ] = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / 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 > We then have a replacement for < span class = "extract" > < span class = "extract-syntax" > strcpy< / span > < / span > , identical except that it's
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bounds-checked:
< / 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" > CStrings::copy< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > to< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > from< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < a href = "4-cst.html#SP3" class = "function-link" > < span class = "function-syntax" > CStrings::check_len< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "4-cst.html#SP4" class = "function-link" > < span class = "function-syntax" > CStrings::len< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > from< / 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 = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > =0; ((< / 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" > i< / span > < span class = "plain-syntax" > < < / span > < span class = "constant-syntax" > MAX_STRING_LENGTH< / 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" > from< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ];< / 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 = "constant-syntax" > 0< / 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 = "SP6" > < / a > < b > § 6. < / b > String comparisons will be done with the following, not < span class = "extract" > < span class = "extract-syntax" > strcmp< / span > < / span > directly:
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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" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > CStrings::ne< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > A< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > B< / 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 = "4-cst.html#SP7" class = "function-link" > < span class = "function-syntax" > CStrings::cmp< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > A< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > B< / span > < span class = "plain-syntax" > ) == < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )?< / span > < span class = "identifier-syntax" > FALSE:TRUE< / 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 = "SP7" > < / a > < b > § 7. < / b > On the rare occasions when we need to sort alphabetically we'll also call:
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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" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > CStrings::cmp< / 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" > CStrings::cmp< / span > < / span > :< br / > < a href = "4-cst.html#SP6" > § 6< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > A< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > B< / 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" > A< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) || (< / span > < span class = "identifier-syntax" > A< / span > < span class = "plain-syntax" > [0] == < / 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 > < span class = "identifier-syntax" > B< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) || (< / span > < span class = "identifier-syntax" > B< / span > < span class = "plain-syntax" > [0] == < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > -1;< / 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" > B< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) || (< / span > < span class = "identifier-syntax" > B< / span > < span class = "plain-syntax" > [0] == < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > )) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "constant-syntax" > 1< / 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" > strcmp< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > A< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > B< / 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. < / b > And the following is needed to deal with extension filenames on platforms
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whose locale is encoded as UTF-8.
< / 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" > CStrings::transcode_ISO_string_to_UTF8< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > dest< / 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 = "identifier-syntax" > j< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > =0, < / span > < span class = "identifier-syntax" > j< / span > < span class = "plain-syntax" > =0; < / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ]; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ++) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > charcode< / span > < span class = "plain-syntax" > = (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > ) (((< / span > < span class = "reserved-syntax" > unsigned< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *)< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > )[< / span > < span class = "identifier-syntax" > i< / 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" > charcode< / span > < span class = "plain-syntax" > > = < / span > < span class = "constant-syntax" > 128< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > dest< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > j< / span > < span class = "plain-syntax" > ++] = (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > ) (< / span > < span class = "constant-syntax" > 0xC0< / span > < span class = "plain-syntax" > + (< / span > < span class = "identifier-syntax" > charcode< / span > < span class = "plain-syntax" > > > < / span > < span class = "constant-syntax" > 6< / span > < span class = "plain-syntax" > ));< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > dest< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > j< / span > < span class = "plain-syntax" > ++] = (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > ) (< / span > < span class = "constant-syntax" > 0x80< / span > < span class = "plain-syntax" > + (< / span > < span class = "identifier-syntax" > charcode< / span > < span class = "plain-syntax" > & < / span > < span class = "constant-syntax" > 0x3f< / 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 = "identifier-syntax" > dest< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > j< / span > < span class = "plain-syntax" > ++] = < / span > < span class = "identifier-syntax" > p< / span > < 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 = "plain-syntax" > < / span > < span class = "identifier-syntax" > dest< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > j< / span > < span class = "plain-syntax" > ] = < / span > < span class = "constant-syntax" > 0< / 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. < / b > I dislike to use < span class = "extract" > < span class = "extract-syntax" > strncpy< / span > < / span > because, and for some reason this surprises
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me every time, it truncates but fails to write a null termination character
if the string to be copied is larger than the buffer to write to: the
result is therefore not a well-formed string and we have to fix matters by
hand. This I think makes for opaque code. So:
< / 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" > CStrings::truncated_strcpy< / 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" > CStrings::truncated_strcpy< / span > < / span > :< br / > Debugging Log - < a href = "2-dl.html#SP6" > § 6< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > to< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / 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" > max< / 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 = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > =0; ((< / 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" > i< / span > < span class = "plain-syntax" > < < / span > < span class = "identifier-syntax" > max< / span > < span class = "plain-syntax" > -1)); < / 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" > from< / span > < span class = "plain-syntax" > [< / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ];< / 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 = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< nav role = "progress" > < div class = "progresscontainer" >
< ul class = "progressbar" > < li class = "progressprev" > < a href = "4-chr.html" > ❮ < / a > < / li > < li class = "progresschapter" > < a href = "P-abgtf.html" > P< / a > < / li > < li class = "progresschapter" > < a href = "1-fm.html" > 1< / a > < / li > < li class = "progresschapter" > < a href = "2-dl.html" > 2< / a > < / li > < li class = "progresschapter" > < a href = "3-em.html" > 3< / a > < / li > < li class = "progresscurrentchapter" > 4< / li > < li class = "progresssection" > < a href = "4-chr.html" > chr< / a > < / li > < li class = "progresscurrent" > cst< / li > < li class = "progresssection" > < a href = "4-ws.html" > ws< / a > < / li > < li class = "progresssection" > < a href = "4-sm.html" > sm< / a > < / li > < li class = "progresssection" > < a href = "4-tf.html" > tf< / a > < / li > < li class = "progresssection" > < a href = "4-taa.html" > taa< / a > < / li > < li class = "progresssection" > < a href = "4-pm.html" > pm< / a > < / li > < li class = "progresschapter" > < a href = "5-htm.html" > 5< / a > < / li > < li class = "progresschapter" > < a href = "6-bf.html" > 6< / a > < / li > < li class = "progresschapter" > < a href = "7-vn.html" > 7< / a > < / li > < li class = "progresschapter" > < a href = "8-ws.html" > 8< / a > < / li > < li class = "progressnext" > < a href = "4-ws.html" > ❯ < / a > < / li > < / ul > < / div >
< / nav > <!-- End of weave -->
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< / main >
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< / body >
< / html >