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#!/bin/sh
set -eu
base="${TMPDIR-/tmp}/mcpu-cpp-int-digs-$$"
mkdir -p "$base"
trap 'rm -rf "$base"' EXIT HUP INT TERM
"$MCPU_CPP" --no-config -dMP < /dev/null > "$base/macros"
check_digs()
{
bits="$1"
int_digs="$2"
uint_digs="$3"
grep "^#define __INT${bits}_DECIMAL_DIG__ ${int_digs}$" "$base/macros" >/dev/null
grep "^#define __UINT${bits}_DECIMAL_DIG__ ${uint_digs}$" "$base/macros" >/dev/null
}
# Decimal digits of the numeric maxima only: no sign and no terminating NUL.
check_digs 8 3 3
check_digs 16 5 5
check_digs 32 10 10
check_digs 64 19 20
check_digs 128 39 39
check_digs 256 77 78
check_digs 512 154 155
check_digs 1024 308 309
check_digs 2048 617 617
check_digs 4096 1233 1234
check_digs 8192 2466 2467
check_digs 16384 4932 4933
check_digs 32768 9864 9865
check_digs 65536 19729 19729
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