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< / ul > < h2 > Foundation Module< / h2 > < ul >
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<!-- Weave of 'Error Messages' 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 > Error Messages< / b > < / li > < / ul > < / div >
< p class = "purpose" > A basic system for command-line tool error messages.< / p >
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< ul class = "toc" > < li > < a href = "3-em.html#SP1" > § 1. Errors handler< / a > < / li > < li > < a href = "3-em.html#SP2" > § 2. Error messages< / a > < / li > < li > < a href = "3-em.html#SP4" > § 4. Deliberately crashing< / a > < / li > < li > < a href = "3-em.html#SP5" > § 5. Survivable errors< / a > < / li > < / ul > < hr class = "tocbar" >
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< p class = "commentary firstcommentary" > < a id = "SP1" > < / a > < b > § 1. Errors handler. < / b > The user can provide a routine to deal with error messages before they're
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issued. If this returns < span class = "extract" > < span class = "extract-syntax" > FALSE< / span > < / span > , nothing is printed to < span class = "extract" > < span class = "extract-syntax" > stderr< / span > < / span > .
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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 = "identifier-syntax" > errors_handler< / span > < span class = "plain-syntax" > )(< / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > ) = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > (*< / span > < span class = "identifier-syntax" > internal_errors_handler< / span > < span class = "plain-syntax" > )(< / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > ) = < / span > < span class = "identifier-syntax" > NULL< / 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" > Errors::set_handler< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / 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 = "reserved-syntax" > int< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > errors_handler< / 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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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Errors::set_internal_handler< / 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 = "reserved-syntax" > void< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *, < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > internal_errors_handler< / 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" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > problem_count< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / 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" > Errors::have_occurred< / 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" > Errors::have_occurred< / span > < / span > :< br / > Streams - < a href = "2-str.html#SP37" > § 37< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / 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" > problem_count< / 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 = "constant-syntax" > TRUE< / 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" > FALSE< / 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" > Errors::issue< / 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" > Errors::issue< / span > < / span > :< br / > < a href = "3-em.html#SP2" > § 2< / a > , < a href = "3-em.html#SP6" > § 6< / a > , < a href = "3-em.html#SP7" > § 7< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > fatality< / 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 > < 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" > errors_handler< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > = (*< / span > < span class = "identifier-syntax" > errors_handler< / span > < span class = "plain-syntax" > )(< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > fatality< / 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" > rv< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > STDERR< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%S"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / 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" > fatality< / span > < span class = "plain-syntax" > ) < / span > < a href = "3-em.html#SP4" class = "function-link" > < span class = "function-syntax" > Errors::die< / span > < / a > < span class = "plain-syntax" > (); < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > problem_count< / 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 = "SP2" > < / a > < b > § 2. Error messages. < / b > Ah, they kill you; or they don't. The fatal kind cause an exit code of 2, to
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distinguish this from a proper completion in which non-fatal errors occur.
These two routines (alone) can be caused by failures of the memory allocation
or streams systems, and therefore must be written with a little care to use
the temporary stream, not some other string which might need fresh allocation.
< / 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" > Errors::fatal< / 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" > Errors::fatal< / span > < / span > :< br / > Memory - < a href = "2-mmr.html#SP11_1" > § 11.1< / a > , < a href = "2-mmr.html#SP15" > § 15< / a > , < a href = "2-mmr.html#SP16_1" > § 16.1< / a > < br / > Streams - < a href = "2-str.html#SP34_1" > § 34.1< / a > , < a href = "2-str.html#SP35_3" > § 35.3< / a > < br / > C Strings - < a href = "4-cst.html#SP3" > § 3< / a > < br / > Binary Files - < a href = "6-bf.html#SP9" > § 9< / a > < br / > Build Files - < a href = "8-bf.html#SP7" > § 7< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / 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" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: fatal error: %s\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > Errors::fatal_with_C_string< / 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" > Errors::fatal_with_C_string< / span > < / span > :< br / > < a href = "3-em.html#SP3" > § 3< / a > < br / > Memory - < a href = "2-mmr.html#SP25_1" > § 25.1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > parameter< / 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" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: fatal error: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > parameter< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "\n"< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > Errors::fatal_with_text< / 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" > Errors::fatal_with_text< / span > < / span > :< br / > Command Line Arguments - < a href = "3-cla.html#SP8" > § 8< / a > , < a href = "3-cla.html#SP11" > § 11< / a > , < a href = "3-cla.html#SP13" > § 13< / a > < br / > Bibliographic Data for Webs - < a href = "8-bdfw.html#SP5" > § 5< / a > < br / > Build Files - < a href = "8-bf.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" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > parameter< / 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" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: fatal error: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > parameter< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "\n"< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > Errors::fatal_with_file< / 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" > Errors::fatal_with_file< / span > < / span > :< br / > Text Files - < a href = "4-tf.html#SP5_1" > § 5.1< / a > , < a href = "4-tf.html#SP5_2" > § 5.2< / a > , < a href = "4-tf.html#SP5_3_2" > § 5.3.2< / a > < br / > Epub Ebooks - < 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 > < br / > Binary Files - < a href = "6-bf.html#SP7" > § 7< / a > , < a href = "6-bf.html#SP8" > § 8< / a > , < a href = "6-bf.html#SP9" > § 9< / a > < br / > Build Files - < a href = "8-bf.html#SP4" > § 4< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / 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 = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: fatal error: %s: %f\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / 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 = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > Errors::fatal_with_path< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / 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 = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: fatal error: %s: %p\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / 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 > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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 > Assertion failures lead to the following:
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< / p >
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< pre class = "definitions code-font" > < span class = "definition-keyword" > define< / span > < span class = "identifier-syntax" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > ) < / span > < a href = "3-em.html#SP3" class = "function-link" > < span class = "function-syntax" > Errors::internal_error_handler< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > __FILE__< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > __LINE__< / span > < span class = "plain-syntax" > )< / 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" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Errors::internal_error_handler< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / 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" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > f< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > lc< / 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" > internal_errors_handler< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > (*< / span > < span class = "identifier-syntax" > internal_errors_handler< / span > < span class = "plain-syntax" > )(< / span > < span class = "identifier-syntax" > p< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > f< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > lc< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP2" class = "function-link" > < span class = "function-syntax" > Errors::fatal_with_C_string< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "internal error (%s)"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / 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 = "SP4" > < / a > < b > § 4. Deliberately crashing. < / b > It's sometimes convenient to get a backtrace from the debugger when an error
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occurs unexpectedly, and one way to do that is to force a division by zero.
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(This is only enabled by < span class = "extract" > < span class = "extract-syntax" > -crash< / span > < / span > at the command line and is for debugging only.)
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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 = "identifier-syntax" > debugger_mode< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > FALSE< / 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" > Errors::enter_debugger_mode< / 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" > Errors::enter_debugger_mode< / span > < / span > :< br / > Command Line Arguments - < a href = "3-cla.html#SP13_1" > § 13.1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > debugger_mode< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > printf< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "(Debugger mode enabled: will crash on fatal errors)\n"< / 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" > Errors::die< / 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" > Errors::die< / span > < / span > :< br / > < a href = "3-em.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > ) { < / span > < span class = "comment-syntax" > as void as it gets< / 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" > DL< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > STREAM_FLUSH< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DL< / 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" > debugger_mode< / 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 = "constant-syntax" > STDERR< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "(crashing intentionally to allow backtrace)\n"< / 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" > to_deliberately_crash< / 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" > printf< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "%d"< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > 1< / span > < span class = "plain-syntax" > /< / span > < span class = "identifier-syntax" > to_deliberately_crash< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "comment-syntax" > on a fatal exit, memory isn't freed, because that causes threading problems< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > exit< / span > < span class = "plain-syntax" > (2);< / 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. Survivable errors. < / b > The trick with error messages is to indicate where they occur, and we can
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specify this at three levels of abstraction:
< / 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" > Errors::nowhere< / 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" > Errors::nowhere< / 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" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP5" class = "function-link" > < span class = "function-syntax" > Errors::in_text_file< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Errors::in_text_file< / 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" > Errors::in_text_file< / span > < / span > :< br / > Command Line Arguments - < a href = "3-cla.html#SP11" > § 11< / a > < br / > Build Files - < a href = "8-bf.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_file_position< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > here< / 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" > here< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP6" class = "function-link" > < span class = "function-syntax" > Errors::at_position< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > here< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > text_file_filename< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > here< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > line_count< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP6" class = "function-link" > < span class = "function-syntax" > Errors::at_position< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / 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 >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Errors::in_text_file_S< / span > < button class = "popup" onclick = "togglePopup('usagePopup11')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup11" > Usage of < span class = "code-font" > < span class = "function-syntax" > Errors::in_text_file_S< / span > < / span > :< br / > Web Structure - < a href = "8-ws.html#SP7_3_2" > § 7.3.2< / a > , < a href = "8-ws.html#SP7_3_2_1" > § 7.3.2.1< / a > , < a href = "8-ws.html#SP7_3_3_2" > § 7.3.3.2< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_file_position< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > here< / 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" > here< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP6" class = "function-link" > < span class = "function-syntax" > Errors::at_position_S< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > here< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > text_file_filename< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > here< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > line_count< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP6" class = "function-link" > < span class = "function-syntax" > Errors::at_position_S< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / 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 >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP6" > < / a > < b > § 6. < / b > Which funnel through:
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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" > Errors::at_position< / span > < button class = "popup" onclick = "togglePopup('usagePopup12')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup12" > Usage of < span class = "code-font" > < span class = "function-syntax" > Errors::at_position< / span > < / span > :< br / > < a href = "3-em.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" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > file< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > line< / 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" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / 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" > file< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f, line %d: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > file< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > line< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > FALSE< / 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" > ERM< / 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" > Errors::at_position_S< / span > < button class = "popup" onclick = "togglePopup('usagePopup13')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup13" > Usage of < span class = "code-font" > < span class = "function-syntax" > Errors::at_position_S< / span > < / span > :< br / > < a href = "3-em.html#SP5" > § 5< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > filename< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > file< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > line< / 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" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / 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" > file< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%f, line %d: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > file< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > line< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%S\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > FALSE< / 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" > ERM< / 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. < / b > Lastly:
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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" > Errors::with_file< / span > < button class = "popup" onclick = "togglePopup('usagePopup14')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup14" > Usage of < span class = "code-font" > < span class = "function-syntax" > Errors::with_file< / span > < / span > :< br / > Text Files - < a href = "4-tf.html#SP5_1" > § 5.1< / a > , < a href = "4-tf.html#SP5_2" > § 5.2< / a > , < a href = "4-tf.html#SP5_3_2" > § 5.3.2< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / 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 = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: %f: %s\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > F< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > FALSE< / 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" > ERM< / 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" > Errors::with_text< / span > < button class = "popup" onclick = "togglePopup('usagePopup15')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup15" > Usage of < span class = "code-font" > < span class = "function-syntax" > Errors::with_text< / span > < / span > :< br / > Build Files - < a href = "8-bf.html#SP9" > § 9< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > char< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > T< / 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" > ERM< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "%s: "< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > PROGRAM_NAME< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > message< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > T< / 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" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "\n"< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "3-em.html#SP1" class = "function-link" > < span class = "function-syntax" > Errors::issue< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ERM< / span > < span class = "plain-syntax" > , < / span > < span class = "constant-syntax" > FALSE< / 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" > ERM< / 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 = "2-trs.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 = "progresscurrentchapter" > 3< / li > < li class = "progresscurrent" > em< / li > < li class = "progresssection" > < a href = "3-cla.html" > cla< / a > < / li > < li class = "progresssection" > < a href = "3-pth.html" > pth< / a > < / li > < li class = "progresssection" > < a href = "3-fln.html" > fln< / a > < / li > < li class = "progresssection" > < a href = "3-cf.html" > cf< / a > < / li > < li class = "progresssection" > < a href = "3-shl.html" > shl< / a > < / li > < li class = "progresssection" > < a href = "3-drc.html" > drc< / a > < / li > < li class = "progresssection" > < a href = "3-tm.html" > tm< / a > < / li > < li class = "progresschapter" > < a href = "4-chr.html" > 4< / 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 = "3-cla.html" > ❯ < / a > < / li > < / ul > < / div >
< / nav > <!-- End of weave -->
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< / main >
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< / body >
< / html >