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Robustify mpers.awk against input containing index loops

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Make mpers.awk check for potential index loops.  Such loops should not
normally happen, but mpers.awk will not go into infinite recursion if
they do.

* mpers.awk (enter, leave): New functions.
(what_is): Use them.
This commit is contained in:
Дмитрий Левин
2015-12-15 03:35:26 +00:00
parent 59992183a6
commit 54d18a279a
1 changed files with 21 additions and 4 deletions
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25
mpers.awk
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@ -15,9 +15,26 @@ function array_get(array_idx, array_member, array_return)
}
return array_return
}
function enter(array_idx)
{
if (called[array_idx]) {
printf("%s: index loop detected:", FILENAME) > "/dev/stderr"
for (item in called)
printf(" %s", item) > "/dev/stderr"
print "" > "/dev/stderr"
exit 1
}
called[array_idx] = 1
}
function leave(array_idx, to_return)
{
delete called[array_idx]
return to_return
}
function what_is(what_idx, type_idx, special, item, \
location, prev_location, prev_returned_size)
{
enter(what_idx)
special = array_get(what_idx, "special")
switch (special) {
case "base_type":
@ -52,7 +69,7 @@ function what_is(what_idx, type_idx, special, item, \
returned_size = to_return * returned_size
if ("" == to_return)
to_return = "00"
return to_return
return leave(what_idx, to_return)
break
case "structure_type":
print "struct {"
@ -107,18 +124,18 @@ function what_is(what_idx, type_idx, special, item, \
break
case "typedef":
type_idx = array_get(what_idx, "type")
return what_is(type_idx)
return leave(what_idx, what_is(type_idx))
break
case "member":
type_idx = array_get(what_idx, "type")
return what_is(type_idx)
return leave(what_idx, what_is(type_idx))
break
default:
type_idx = array_get(what_idx, "type")
what_is(type_idx)
break
}
return 0
return leave(what_idx, 0)
}
BEGIN {
print "#include <inttypes.h>"