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Currently growstackto will repeatedly call growstackblock until
the requisite size is obtained. This is wasteful. This patch
changes growstackblock to take a minimum size instead.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch adds the growstackto helper which repeatedly calls
growstackblock until the requested size is reached.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The herefd hack goes back more than a decade. it limits the amount of
memory we have to allocate when expanding here-documents by writing the
result out from time to time. However, it's no longer safe because the
stack is used to place intermediate results too and there we certainly
don't want to write them out should we be short on memory.
In any case, with today's computers we can afford to keep the entire
result in memory and write them out at the end.
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This patch gets rid of the stack mark tracking hack by allocating a little
bit of stack memory if we're at risk of planting a stack mark which may be
grown later. To do this a new function pushstackmark is added which lets
the user pick a bigger amount to allocate since some users do that anyway
after setting a stack mark.
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The function grabstackblock is identical in semantics to stalloc within its
input constraints.
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Using char in the function argument causes unnecessary truncation to occur.
This patch changes it to an int.
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This change updates the BSD licence to the three-clause version since
NetBSD has already done so. This makes dash GPL-compatible.
It also adds Christos Zoulas (NetBSD ash maintainer) to the COPYING file.
I've added "copyright by Herbert Xu" to most files.
Finally all CVS IDs and inclusion of sys/cdefs.h have been removed.
The latter is needed for support of klibc.
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