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git-svn-id: https://protobuf-c.googlecode.com/svn/trunk@262 00440858-1255-0410-a3e6-75ea37f81c3a
This commit is contained in:
lahiker42 2010-09-17 14:17:41 +00:00
parent 00b5c56f69
commit 3695444f6a
1 changed files with 110 additions and 0 deletions
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110
scripts/get-structure-packing-info Executable file
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@ -0,0 +1,110 @@
#! /bin/sh
die () {
echo "$1" 1>&2
exit 1
}
die_unless_set () {
eval "isset=\$$1"
test -z "$isset" && die "$1 not set"
}
# test_is_equal DEFINE_TYPE SIZEOF_TYPE EVAL_IF_TRUE
test_is_equal () {
# Write out C file
cat > test-compile-for-structure-packing-0.c <<EOF
#include <inttypes.h>
$1;
int main ()
{
/* Program does not compile iff alignof(int32_t) is 2 */
switch (0) { case $2: case sizeof(TYPE): ; }
}
EOF
# If it DOESN'T compile, then the values are equal.
$CC -o /dev/null test-compile-for-structure-packing-0.c > /dev/null 2>&1 || { eval "$3" ; }
rm -f test-compile-for-structure-packing-0.c
}
test_is_not_equal () {
# Write out C file
cat > test-compile-for-structure-packing-0.c <<EOF
#include <inttypes.h>
$1;
int main ()
{
/* Program does not compile iff alignof(int32_t) is 2 */
switch (0) { case $2: case sizeof(TYPE): ; }
}
EOF
# If it DOESN'T compile, then the values are equal.
$CC -o /dev/null test-compile-for-structure-packing-0.c > /dev/null 2>&1 && { eval "$3" ; }
rm -f test-compile-for-structure-packing-0.c
}
test_is_equal "typedef int TYPE" 2 "SIZEOF_INT=2"
test_is_equal "typedef int TYPE" 4 "SIZEOF_INT=4"
test_is_equal "typedef int TYPE" 8 "SIZEOF_INT=8"
die_unless_set SIZEOF_INT
test_is_equal "typedef void* TYPE" 2 "SIZEOF_POINTER=2"
test_is_equal "typedef void* TYPE" 4 "SIZEOF_POINTER=4"
test_is_equal "typedef void* TYPE" 8 "SIZEOF_POINTER=8"
die_unless_set SIZEOF_POINTER
test_is_not_equal "typedef float TYPE" 4 'die "expecting float to be 4 bytes"'
test_is_not_equal "typedef double TYPE" 8 'die "expecting double to be 4 bytes"'
test_is_equal "typedef struct { char c; int32_t i; }" 5 "ALIGNOF_INT32=1"
test_is_equal "typedef struct { char c; int32_t i; }" 6 "ALIGNOF_INT32=2"
test_is_equal "typedef struct { char c; int32_t i; }" 8 "ALIGNOF_INT32=4"
die_unless_set ALIGNOF_INT32
test_is_equal "typedef struct { char c; int64_t i; }" 9 "ALIGNOF_INT64=1"
test_is_equal "typedef struct { char c; int64_t i; }" 10 "ALIGNOF_INT64=2"
test_is_equal "typedef struct { char c; int64_t i; }" 12 "ALIGNOF_INT64=4"
test_is_equal "typedef struct { char c; int64_t i; }" 16 "ALIGNOF_INT64=8"
die_unless_set ALIGNOF_INT64
test_is_equal "typedef struct { char c; float i; }" 5 "ALIGNOF_FLOAT=1"
test_is_equal "typedef struct { char c; float i; }" 6 "ALIGNOF_FLOAT=2"
test_is_equal "typedef struct { char c; float i; }" 8 "ALIGNOF_FLOAT=4"
die_unless_set ALIGNOF_FLOAT
test_is_equal "typedef struct { char c; double i; }" 9 "ALIGNOF_DOUBLE=1"
test_is_equal "typedef struct { char c; double i; }" 10 "ALIGNOF_DOUBLE=2"
test_is_equal "typedef struct { char c; double i; }" 12 "ALIGNOF_DOUBLE=4"
test_is_equal "typedef struct { char c; double i; }" 16 "ALIGNOF_DOUBLE=8"
die_unless_set ALIGNOF_DOUBLE
case "$SIZEOF_POINTER" in
2)
test_is_equal "typedef struct { char c; void *i; }" 3 "ALIGNOF_POINTER=1"
test_is_equal "typedef struct { char c; void *i; }" 4 "ALIGNOF_POINTER=2"
;;
4)
test_is_equal "typedef struct { char c; void *i; }" 5 "ALIGNOF_POINTER=1"
test_is_equal "typedef struct { char c; void *i; }" 6 "ALIGNOF_POINTER=2"
test_is_equal "typedef struct { char c; void *i; }" 8 "ALIGNOF_POINTER=4"
;;
8)
test_is_equal "typedef struct { char c; void *i; }" 9 "ALIGNOF_POINTER=1"
test_is_equal "typedef struct { char c; void *i; }" 10 "ALIGNOF_POINTER=2"
test_is_equal "typedef struct { char c; void *i; }" 12 "ALIGNOF_POINTER=4"
test_is_equal "typedef struct { char c; void *i; }" 16 "ALIGNOF_POINTER=8"
;;
*)
die "bad SIZEOF_POINTER=$SIZEOF_POINTER"
esac
die_unless_set ALIGNOF_POINTER
case "$SIZEOF_INT" in
2) ALIGNOF_INT=$ALIGNOF_INT16 ;;
4) ALIGNOF_INT=$ALIGNOF_INT32 ;;
8) ALIGNOF_INT=$ALIGNOF_INT64 ;;
*) die "bad SIZEOF_INT=$SIZEOF_INT" ;;
esac
for a in SIZEOF_INT SIZEOF_POINTER \
ALIGNOF_INT16 ALIGNOF_INT32 ALIGNOF_INT64 ALIGNOF_INT ALIGNOF_POINTER
do
eval "v=\$$a"
echo "#define $a $v"
done