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Now that the input_file structure is sufficiently fleshed out, just stop
EOF at the putback level, and make sure files at EOF STAY at EOF.
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- no need to record more, as this is just for diagnosis purpose. This
doesn't affect m4's main engine.
- don't free file names as a compromise: the only other options would be
to ref count them (not worth the complexity) or dup them systematically (ick).
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the file name and line number.
This yields more meaningful error messages, and the possibility for yet
more.
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Add missing prototypes,
Make local functions static,
Sort extern.h by file,
Constify all char * that can be,
Copy temp file name so that eval does not modify its arguments.
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repairs patterns such as
divert(6)
divert(7)
undivert(6)
divert(6)
which are not that frequent, but were *quite* thoroughly broken...
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Let indx match netbsd flavor, to simplify diffs.
Show how many quotes were not closed.
Increase stack slightly, now that we're no longer bound by argspace.
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A bit wasteful, but not too intrusive.
Also remove pushback buffer limitations, as this would be mostly useless
otherwise.
Incidentally, pushback buffer overflow detection in pbstr was wrong.
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Simply put, mkstemp/unlink/rewind has the proper semantics under Unix,
and so we don't have to keep track about temp file names and remove them.
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- use err.h and kill oops,
- use __progname and kill basename,
- let indx use strstr
- proper EOS decl
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that typedef 'short'. 'char' (which was previously used) because char
may be unsigned and ((char)EOF) != EOF if that is the case. That was
causing the (char)EOF (0xff) pushed back in main to be interepreted as
a character, and, in some cases, to be written to the output. 'short'
was used rather than 'signed char' because if the latter is used,
0xff characters in the input would confuse m4. (No point in introducing
(more?) 8-bit lossage.)
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